US20080097523A1 - Surgical helical fastener with applicator - Google Patents
Surgical helical fastener with applicator Download PDFInfo
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- US20080097523A1 US20080097523A1 US11/978,893 US97889307A US2008097523A1 US 20080097523 A1 US20080097523 A1 US 20080097523A1 US 97889307 A US97889307 A US 97889307A US 2008097523 A1 US2008097523 A1 US 2008097523A1
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- fastener
- applicator
- tissue
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- rotator
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
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- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/0469—Suturing instruments for use in minimally invasive surgery, e.g. endoscopic surgery
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- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/128—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips
- A61B17/1285—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord for applying or removing clamps or clips for minimally invasive surgery
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- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06066—Needles, e.g. needle tip configurations
- A61B2017/06076—Needles, e.g. needle tip configurations helically or spirally coiled
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/0063—Implantable repair or support meshes, e.g. hernia meshes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T24/00—Buckles, buttons, clasps, etc.
- Y10T24/46—Pin or separate essential cooperating device therefor
- Y10T24/4693—Pin or separate essential cooperating device therefor having specific wire penetrating portion
- Y10T24/4695—Wire curved or bent
Definitions
- This invention relates to surgical fasteners and their associated applicators, and more particularly, surgically fastening material to tissue.
- Fasteners have been used surgically to eliminate the need for suturing, which is both time consuming and inconvenient.
- surgeon can use a stapler apparatus, i.e., a fastener implanting device loaded with surgical fasteners to accomplish in a few seconds what would have taken many minutes to perform by suturing. This reduces blood loss and trauma to the patient.
- Conventional surgical fasteners have been in the form of ordinary metal staples, which are bent by the delivery apparatus to hook together body tissue.
- conventional staples comprise a pair of legs joined together at one end by a crown.
- the crown may be a straight member connecting the legs or may form an apex.
- the legs may extend substantially perpendicular from the crown or at some angle therefrom. Irrespective of the particular configuration, however, conventional staples are designed so that they may be deformed to hold body tissue.
- the stapler applicators have conventionally embodied structure functioning to project the conventional staple into tissue as well as to deform the staple so that it is retained against the tissue.
- typical applicators include an anvil cooperating with means to eject the conventional staple from the applicator.
- the anvil can operate to deform the legs of the staple after they have passed through the body tissue.
- the anvil may deform the crown of the conventional staple so that its legs will project into the body tissue in a fashion so as to hold the staple against the tissue.
- conventional staples require deformation and must cooperate with applicators having an anvil or other means to deform the staples
- conventional applicators typically comprise complex structures and can be prohibitively expensive.
- Conventional applicators must embody structure functioning to not only eject the fasteners but to do so in a manner so that the fastener deforms properly and timely.
- conventional applicators must be equipped with structure functioning to move the anvil into and out of position so that when the fastener is ejected from the applicator, the anvil is properly positioned and once fastener deformation is complete, moves out of position, thereby allowing the process to be repeated.
- the anvil must be formed into a proper configuration so that fastener deformation can be repeated accurately.
- the force between the fastener and the anvil must be controlled so that repeated deformation is accomplished.
- the objectives of many inventions in this field have been to accomplish these goals by the simple manipulation of a single lever. It is to be appreciated, therefore, that the fastener applicators have become complex and expensive instruments.
- Two part fasteners have also been conventionally utilized, where a barbed staple is used in conjunction with a retaining piece to hold the staple in place.
- the two part staple comprises a crown or backspan and two barbed prongs which are engaged and locked into a separate retainer piece.
- the staple is pressed into the body tissue so that the barbs penetrate the tissue and emerge from the other side where they are then locked into the retainer piece. Retainers prevent the staple from working loose from the tissue.
- the two piece fasteners cannot be unlocked and are not removable.
- the two piece fasteners require the staple delivery apparatus to have access to both sides of the tissue.
- two piece fasteners are limited since they cannot be used where access to tissue is from one direction only.
- deformable surgical fasteners In those situations where access to body tissues is limited to one direction, as in grafting procedures, deformable surgical fasteners have been conventionally employed. As mentioned previously, however, the applicators commonly used in these situations embody an anvil cooperating with a fastener to deform it and consequently, tend to be of a complex design.
- a simple applicator that dispenses a surgical fastener having high surface area for retentive contact with tissue and that can be delivered into body tissue from one direction may be employed.
- the present invention embodies these characteristics.
- the invention includes a surgical fastener and an applicator used in delivering the fastener into body tissue.
- the fastener and applicator of the present invention may be used in a number of medical procedures including ligating tissue, hernia mesh repair, bladder neck suspension, and in conjunction with implant drug delivery systems or procedures involving positioning of surgical or implantable devices in a patient's body.
- the preferred embodiment of the surgical fastener of the present invention is formed into the configuration of a continuous helical coil.
- the continuous helical coil is longitudinally collapsible and expandable.
- At the distal end of the helical fastener is a point for enhancing penetration into tissue.
- the proximal end of the helical fastener has a T-bar which sections the diameter of the fastener, thereby providing a surface for receiving and transmitting longitudinal and rotational forces so that the fastener may be driven into tissue by a corkscrew action.
- the pitch and length of the helical fastener may vary upon the application as can its diameter and configuration of the most proximal and distal coils comprising the fastener. Additionally, the material selection and fastener stiffness may be selected with a particular application in mind.
- the fastener comprises a double continuous helical coil that is also longitudinally collapsible and expandable and may embody various configurations depending upon the application.
- the distal end of the double helical fastener comprises two points for enhancing penetration into tissue and its proximal end comprises a connector bar which connects the two helixes as well as sections the diameter of the double helical fastener.
- the surgical fastener further comprises a pivot post extending through the center of the fastener and operating to provide the fastener with a stable pivot. In any of the embodiments, one or more barbs may be employed near the point to enhance anchoring characteristics.
- a preferred embodiment of the fastener applicator of the present invention includes a proximal portion and a distal portion.
- the proximal portion is preferably fabricated to be a “reusable” component and the distal portion a “disposable” component. Alternatively, both the distal and proximal portion can be made disposable.
- the distal portion is elongate and embodies an outer tube housing an inner rotator, a lock clip/indicator and a load spring.
- the proximal portion includes a handle.
- a thread form comprising an interlock spring is provided within the outer tube.
- the rotator includes a structure running longitudinally along its length that functions to receive the T-bar or connector bar of the fastener and in this way, the rotator may hold a plurality of fasteners.
- the load spring applies a force against the lock clip/indicator operating to bias the plurality of springs distally within the outer tube and towards the nose piece.
- the thread form functions to engage the coils of the helical fasteners and when rotating the rotator, a fastener is driven from the distal end of the applicator.
- the distal end has various other structures functioning to engage the coils of the fastener and to drive them from the distal end of the applicator.
- the distal end comprises a nose piece protrusion for engaging the fastener.
- the proximal portion of the applicator has a handle and an actuator cooperating with the rotator.
- the proximal portion of the applicator embodies a lever pivotally attached about a midpoint to the handle.
- a first end of the lever is configured to be gripped by hand and a second end is adapted to engage a nut driver.
- the nut driver travels along a helical lead screw which is connected to the rotator.
- the lever comprises a midsection extension. Pivotally attached to the midsection extension of the lever is a spring loaded pawl adapted to releasably engage gear teeth formed in the interior of the handle.
- the spring loaded pawl prohibits the lever from backstroking until it has been completely depressed.
- the pawl clears the gear teeth and the spring, biasing the pawl, rotates the pawl away from the teeth, thereby allowing the lever to return to its undepressed condition.
- the lever is pivotally attached at a first end to the handle, the second end being adapted to engage the nut driver.
- this alternate embodiment of the proximal portion includes a clutch assembly or releasable connection between the lead screw and rotator and cooperating means to prohibit the lever from backstroking until it has been completely depressed.
- FIG. 1 depicts a perspective view of a fastener of the present invention, illustrating a side view of a helical fastener.
- FIG. 1A depicts another perspective view of the fastener of the present invention, illustrating an end view of the helical fastener.
- FIG. 1B depicts a schematic view of a fastener of the present invention, illustrating a substantially collapsed helical fastener with a relatively small gap that has been partially inserted into tissue.
- FIG. 1C depicts a schematic view of a fastener of the present invention, illustrating the helical fastener depicted in FIG. 1B completely inserted into tissue.
- FIG. 1D depicts a schematic view of a fastener of the present invention, illustrating a substantially collapsed helical fastener with a relatively large gap that has been partially inserted into the tissue.
- FIG. 1E depicts a schematic view of a fastener of the present invention, illustrating the helical fastener depicted in FIG. 1D completely inserted into tissue.
- FIG. 1F depicts a perspective view of another embodiment of the present invention, illustrating an end view of the helical fastener.
- FIG. 2 depicts a perspective view of another embodiment of the present invention, illustrating a double helical fastener.
- FIG. 2A is a front view of the double helical fastener of FIG. 2 .
- FIG. 2B is side view of the double helical fastener of FIG. 2 .
- FIG. 2C is a top view of the double helical fastener of FIG. 2 .
- FIG. 3 is a perspective view of yet another embodiment of the present invention, illustrating another design of a double helical fastener.
- FIG. 3A is a front view of the double helical fastener of FIG. 3 .
- FIG. 3B is a side view of the double helical fastener of FIG. 3 .
- FIG. 3C is a top view of the double helical fastener of FIG. 3 .
- FIG. 4 is a perspective view of the present invention, illustrating a helical fastener with a central post.
- FIG. 5 depicts a schematic cross-sectional view of an applicator of the present invention, illustrating a side view of the applicator.
- FIG. 6 is a schematic cross-sectional side view of a terminal end of the applicator.
- FIG. 6A is a schematic cross-sectional end view of a terminal end of the applicator.
- FIG. 7 is a schematic cross-sectional view of the terminal end of the applicator, illustrating the preferred embodiment of the terminal end.
- FIG. 7A is a schematic cross-sectional end view of the preferred embodiment of the terminal end of the application shown in FIG. 7 .
- FIG. 8 is a schematic cross-sectional view of the terminal end of the applicator, illustrating another embodiment of the terminal end.
- FIG. 8A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 8 .
- FIG. 9 is a schematic cross-sectional view of the terminal end of the applicator, illustrating yet another embodiment of the terminal end.
- FIG. 9A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 9 .
- FIG. 10 is a schematic cross-sectional view of the terminal end of the applicator, illustrating still yet another embodiment of the terminal end.
- FIG. 10A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 10 .
- FIG. 11 is a schematic cross-sectional view of the terminal end of the applicator, illustrating another embodiment of the terminal end.
- FIG. 11A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 11 .
- FIG. 12 is a schematic cross-sectional view of the terminal end of the applicator, illustrating a further embodiment of the terminal end.
- FIG. 12A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown in FIG. 12 .
- FIG. 13 is a schematic cross-sectional view of the terminal end of the applicator, illustrating a still further embodiment of the terminal end.
- FIG. 14 is a schematic cross-sectional view of the terminal end of the applicator, illustrating still yet another embodiment of the terminal end.
- FIG. 15 is a schematic cross-sectional view of another applicator of the present invention, illustrating a side view of the applicator.
- FIG. 16 is a schematic partial cross-sectional view of a releasable connection between the lead screw and rotator.
- FIG. 16A is schematic representation of a distal end of the lead screw, illustrating an end view of the lead screw.
- FIG. 16B is a schematic representation of the distal end of the lead screw, illustrating a side view of the lead screw depicted in FIG. 16 .
- FIG. 16C is a schematic representation of the proximal end of the rotator, illustrating a side view of the rotator.
- FIG. 16D is a schematic representation of the proximal end of the rotator, illustrating an end view of the rotator depicted in FIG. 16B .
- the invention is embodied in a continuous helical fastener and an applicator therefor.
- the helical fastener has a high retentive surface area and the applicator has a simple design and functions to dispense the helical fasteners, without substantially deforming the fasteners, into body tissue, access to which is from one direction only.
- Some conventional fasteners require deformation to hold tissue and are consequently limited since they require complex applicators to attach them into tissue.
- Other conventional fasteners lack high retentive surface area for securely holding tissue.
- Still other fastener/applicator systems require access to tissue from two directions in order to accomplish attaching a fastener to tissue.
- the helical fastener and applicator of the present invention provides a superior means to attach fasteners to tissue.
- FIGS. 1, 1A and 5 One embodiment of the present invention is embodied in a helical fastener 10 which is attached to tissue by employing a novel applicator 12 which rotates the fastener 10 into tissue.
- the dimensions and physical characteristics of the helical fastener 10 are selected to insure a secure attachment of the fastener 10 to tissue.
- the dimensions and physical characteristics of the applicator 12 utilized to dispense the fasteners 10 into tissue are dependent upon the application.
- the fastener 10 is formed into the configuration of a continuous helix and may have a depth 16 , a diameter 18 and a pitch 20 determined by the application.
- the continuous helix may be longitudinally collapsible and expandable.
- the cross-sectional profile of the continuous helix is substantially circular in the preferred embodiment but can be square, rectangular or triangular.
- the pre-formed pitch can be 0.050 inches.
- the pre-formed pitch can vary from 0 to a maximum of approximately 3.0 times the coil diameter.
- the final pitch 31 may be less than or greater than the pre-formed pitch. If the coil is made of rigid construction, as is also contemplated, pitch would be made substantially fixed.
- the diameter in the preferred embodiment may be 5 mm; however, designs ranging from 1 mm and up are contemplated. In practice, the depth 16 of the fastener 10 must be selected so that the extent of fastener penetration into tissue is sufficient to hold the fastener 10 in place.
- distal end 22 of the fastener 10 is to be configured such that a gap 23 exists between the most distal coil 27 (or first coil) of the fastener 10 and its adjacent coil.
- a gap 23 exists between the most distal coil 27 (or first coil) of the fastener 10 and its adjacent coil.
- the gap 23 that generally determines final pitch 31 . Accordingly, the magnitude of the gap 23 can be varied, depending upon the application, to achieve the desired final pitch 31 and penetration 29 in tissue. Thus, the greater the gap 23 , upon insertion of the fastener 10 in tissue, the greater the penetration 29 and final pitch 31 of the fastener 10 in tissue.
- the distal end 22 of the helical fastener 10 terminates with a point 24 .
- the point 24 may be sharp or blunt depending upon the tissue to which the fastener 10 will be affixed. Additionally, one or more barbs or a sharp point projecting in reverse direction to point 24 (not shown) can be added to fastener 10 near point 24 to enhance anchoring characteristics of the fastener.
- a proximal end 26 of the helical fastener 10 may comprise structure functioning to receive and transmit applied longitudinal forces.
- the most proximal coil is formed into a T-bar 33 that perpendicularly sections the diameter 18 of the fastener 10 . In alternate embodiments, it is also contemplated that the most proximal coil section the diameter 18 non-perpendicularly or be formed into a spiral 35 existing in a single plane (See FIG. 1F ).
- the fastener be made from semi-stiff implantable wire, such as titanium, wound into a helical shape.
- the helical fastener 10 may comprise plastic or absorbable materials. Examples of materials that can be used in constructing the helical fastener 10 include titanium, titanium alloys, stainless steel, nickel, chrome alloys and any other biocompatible implantable metals. Other options for materials are liquid crystal polymers, HDPE, polyglycolic acid, and polyglycolid hydroxgacetic acid. Further, it may also be desirable to coat the fastener, or a portion thereof, with a biocompatible lubricious material that provides for easier delivery of the fastener into tissue.
- the fastener 110 is formed into the configuration of a double helix (See FIGS. 2-2C ).
- the fastener 110 has increased retentive strength as well as means to balance the fastener 110 as it is pressed into tissue.
- the configuration of the double helical fastener 110 i.e., the pre-formed pitch and diameter, may be varied for a particular application and a barb may be employed to enhance anchoring in tissue.
- the materials contemplated are the same as those for the helical fasteners.
- the double helical fastener 110 is also longitudinally collapsible and expandable and its final pitch is dependent upon the gap 112 existing between the most distal coils 114 , 115 of the fastener 110 and their adjacent coils.
- proximal 118 and distal 120 ends of the double helical fastener 110 comprise structure to drive the fastener into tissue as well as tissue piercing structures.
- the proximal end 118 has a connector bar 122 sectioning the diameter of the fastener that connects one helical coil to another and functions to receive and transmit longitudinal forces.
- the distal end 120 terminates with two points 124 , 125 for piercing and facilitating the implantation of the fastener 110 into tissue.
- the double helical fastener 110 have a full turn design ( FIG. 22D ) as well as a half turn design ( FIGS. 3-3D ). It is to be understood, however, that the designs having more than one turn and having other increments of turns are contemplated. It is the applicator that will determine the required number of turns for a specific fastener 110 .
- the double helical fastener 110 is provided with a pivot post 130 having a pointed terminal end 132 .
- the pivot post 130 of this embodiment operates to provide the fastener 110 with a stabilizing element so that, as the fastener 110 is being turned, the helical coils cooperatively enter the tissue.
- the applicator 12 ( FIG. 5 ) comprises a proximal portion 28 having a handle 30 and an actuator 32 and a cooperating elongated distal portion or cannula 34 housing a plurality of fasteners.
- the fasteners are ejected, one by one, out of a distal portion 34 and into body tissue.
- the applicator 12 hereinafter described in more detail, is equally proficient in driving each of the embodiments of fasteners set forth above into tissue.
- the distal portion 34 comprises an outer tube 36 housing a rotator 38 , a lock/clip indicator 40 and a load spring 42 .
- Extending longitudinally along the rotator 38 is a groove 44 which operates to receive the most proximal coil sectioning the fastener.
- FIG. 6 shows only a single fastener (having a single helical design) retained by the rotator 38 , it is to be appreciated that the rotator 38 may receive a plurality of fasteners (having a single or double helical design), wherein each fastener has its last coil positioned within the rotator groove 44 .
- FIG. 6 shows only a single fastener (having a single helical design) retained by the rotator 38 , it is to be appreciated that the rotator 38 may receive a plurality of fasteners (having a single or double helical design), wherein each fastener has its last coil positioned within the rotator groove 44 .
- FIG. 6 shows only
- the rotator 38 has a cross-sectional profile approximately a “D”, wherein the flat portion operates to engage the coil sectioning the fasteners. Irrespective of the configuration of the rotator, however, the rotator is to embody structure functioning to engage a plurality of fasteners and to facilitate turning them into tissue.
- load spring 42 applies a force through the lock clip indicator 40 to bias the plurality of fasteners distally.
- the lock clip/indicator 40 may comprise a simple washer sized and shaped to engage the fasteners and rotator 38 as well as to receive forces from the load spring 42 .
- lock/clip indicator 40 serves as a jam stop to prevent further actuation by rotator 38 upon discharge of all fasteners by mating with, or abutting against, structure comprising the terminal end 50 and preventing further rotation.
- Lock/indicator 40 can be made of a color (or shape) to serve as an empty indicator notifying the user that no more fasteners are available.
- the load spring 42 is to be retained within the outer tube 36 and to have physical characteristics such that sufficient forces may be applied through a front end 43 to a last remaining fastener contained within the applicator 12 .
- a back end (not shown) of the load spring 42 may be placed against any stationery structure within the outer tube 36 , thereby providing a foundation against which the spring 42 may be compressed.
- the load spring 42 extends substantially the length of the distal portion 34 .
- the outer tube 36 is configured with a thread form 201 comprising an interlock spring 203 fixedly retained within the outer tube 36 and extending substantially the length thereof.
- the interlock spring 203 may be fixedly retained within the outer tube 36 by ensuring a tight interference between the parts or the interlock spring may be spot welded or equivalently bonded within the outer tube.
- the thread form 201 operates to guide the fasteners through the distal portion 34 and to eject them from the applicator 12 .
- a nose piece 48 attached at a terminal end 46 of the distal portion 34 may be a nose piece 48 .
- the nose piece 48 may further comprise a protrusion 50 extending perpendicularly and towards a longitudinal axis 52 of the distal portion 34 .
- This nose piece protrusion 50 also functions to engage the surgical fasteners and to force them from the terminal end 46 of the distal portion 34 as well as engaging lock/clip indicator 40 as described above.
- the distal portion embodies other structure or thread forms functioning to engage the surgical fasteners and guide them out of the applicator and into tissue (See FIGS. 9-14 ).
- the outer tube 36 is rolled at its terminal end 46 and a 180 DEG portion of the rolled terminal end is cut away. The remaining rolled portion engages the fastener while the portion cut away provides an exit for the fasteners.
- the embodiment depicted in FIGS. 10 and 10 A is similar to that of FIGS. 9 and 9 A, the difference being that instead of removing a portion of the rolled terminal end 46 , it is stamped or deformed to thereby provide an exit.
- FIGS. 12, 12A , 13 and 14 show yet another embodiment, wherein two longitudinally spaced apart stabilizing points 301 , 302 are formed 180 DEG from each other within the outer tube. These stabilizing points also operate to engage the fastener and guide it into tissue.
- FIGS. 12, 12A , 13 and 14 they each comprise a terminal end 46 formed with threads which operate to engage and eject a fastener.
- FIGS. 12 and 12 A are depicted threads machined or formed solely within the inside of the outer tube.
- FIG. 13 shows an internally threaded sleeve attached to the outside of the terminal end 46 of the outer tube 36 .
- FIG. 14 illustrates an applicator 12 provided with a terminal end 46 deformed so as to have internal and external threaded structures. Irrespective of the design chosen for the terminal end of the applicator, however, each of the designs are effective with a relatively small overall outer diameter, i.e., on the order of 5 mm.
- the actuator 32 functions to turn the rotator 38 .
- the distal end 22 of a fastener is threaded out of the terminal end 46 of the applicator 12 (see FIG. 5 ).
- a lever 54 is pivotally connected about a midpoint 56 to the handle 30 .
- a first end 58 of the lever 54 is to be configured for gripping by hand.
- a second end 60 of the lever is to be adapted to pivotally engage a nut driver 62 .
- the nut driver 62 of the applicator 12 travels upon a high helix lead screw 64 which is rotatably mounted within the proximal portion 28 .
- a longitudinal axis of the high helix lead screw 64 is coaxial with the longitudinal axis 52 extending through the distal portion 34 of the applicator 12 .
- the nut driver 62 travels along the lead screw 64 causing it to rotate through a connection of the lead screw 64 to the rotator 38 , the action of the lead screw causes the rotator to rotate.
- the lead screw 64 may be connected to the rotator 38 by any conventional means.
- the lead screw 64 can have an internal bore receiving and engaging an end of the rotator 38 .
- the length of travel of the nut driver 62 along the lead screw 64 is chosen such that it causes the rotator to rotate a predetermined number of times so that a single helical fastener 10 is ejected from the applicator 12 .
- the lever further comprises a midsection extension 66 .
- Pivotally attached to the midsection extension 66 of the lever 54 is contemplated to be a spring loaded pawl 68 adapted to releasably engage gear teeth 70 formed in the interior of the handle 30 .
- Spring loaded pawl 68 is configured to prohibit the lever 54 from backstroking until it has been completely depressed.
- the pawl 68 clears the gear teeth 70 and the spring biasing the pawl 68 rotates the pawl 68 away from the teeth 70 , thereby allowing the lever 54 to return to its undepressed condition.
- the nut driver 62 travels a pre-determined distance along the lead screw 64 , causing the rotator 38 to rotate a pre-determined number of revolutions corresponding to a number of turns of a particular helical fastener 10 .
- the fasteners retained by the rotator also rotate and the coils of the most distal fastener are threaded out of the terminal end 46 of the applicator 12 and into tissue.
- the spring loaded pawl 68 operates to hold the lever 54 stationery and will continue to function to hold the lever 54 stationery until the lever 54 has been completely depressed. In this way, the delivery of fasteners into body tissue is controlled so that only a single fastener may be completely ejected out of the applicator 12 and pressed into body tissue at a time.
- the proximal portion 28 is fabricated to have a reusable handle that can be re-sterilized, and the distal portion is made disposable.
- the distal portion would be discarded and replaced.
- the handle could be reused up to a limited number of procedures.
- a lever 354 is pivotally connected at a first end 355 to the handle 330 and biased to its undepressed position by a spring 357 .
- the mid-section 358 of the lower 354 is configured for gripping by hand.
- a second end 360 of the lever is to be adapted to pivotally engage a nut drive 362 .
- the nut driver 362 of the applicator 312 travels along a high helix lead screw 364 which is rotatably mounted within the proximal portion 328 .
- the nut driver travels along the lead screw 364 causing it to rotate and, through a clutch assembly or a releasable connection of the lead screw 364 to the rotator 38 , the action of the lead screw causes the rotator to rotate.
- the lever 354 has a mid-section extension 366 that cooperates with a spring biased latch pawl mechanism 368 fixed to the handle adapted to releasably engage teeth 370 formed on the mid-section extension 366 .
- the spring biased latch pawl is configured to prohibit the lever 354 from backstroking until it has been completely depressed.
- the latch pawl 368 clears the mid-section teeth 370 and the spring biased latch pawl 368 rotates away from the teeth, thereby allowing the lever 354 to return to its undepressed condition.
- the clutch assembly or releasable connection functions to transfer the rotation of the lead screw 364 to the rotator 38 , thereby causing the rotator to rotate. Additionally, upon complete depression of the lever, the clutch assembly operates to allow relative motion of the lead screw 364 and the rotator.
- the distal end 370 of the lead screw 364 has a connecting surface 372 equipped with leaf springs 374 , 376 each having an engaging face 377 and an internal bore 378 existing coaxially with a longitudinal axis of the lead screw.
- the proximal end 380 of the rotator 38 has a cooperating connecting surface 382 having ridges 384 for releasable engagement with the leaf springs 374 , 376 and an extension 386 adapted to fit within the internal bore of the lead screw connecting surface.
- the nut driver 362 travels a pre-determined distance along the lead screw 364 , causing the rotator 38 to rotate a pre-determined number of revolutions.
- the fasteners retained by the rotator also rotate and the coils of the most distal fasteners are threaded out of the applicator and into the tissue.
- the latch pawl mechanism 368 disengages from the teeth 370 and the lever 354 is returned to its undepressed position by spring 357 .
- the proximal portion of this embodiment functions to allow only a single fastener to be completely ejected from the applicator and be pressed into body tissue at a time.
- means to cause the rotator to rotate may comprise a single knob connected to a rotator which can be turned by hand.
- the revolving means may include a rack and gear structure or a set of beveled gears.
- the rotator may be internally threaded, wherein the threaded portions function to house as well as advance the helical fasteners 10 . Irrespective of the means or structure employed, however, it is contemplated that the number of revolutions of the rotator be set to a pre-determined parameter so that the delivery of helical fasteners to tissue may be controlled.
- the helical fastener in applicator of the present invention functions to securely attach a fastener with high retentive surface area to tissue from one direction through the utilization of an applicator having a simple design. It is also to be appreciated that the present invention may be utilized in a number of applications including ligating tissue, hernia mesh repair, bladder neck suspension, and in conjunction with implant drug delivery systems or procedures involving positioning of surgical or implantable devices in patient.
Abstract
Description
- This invention relates to surgical fasteners and their associated applicators, and more particularly, surgically fastening material to tissue.
- Fasteners have been used surgically to eliminate the need for suturing, which is both time consuming and inconvenient. In many applications the surgeon can use a stapler apparatus, i.e., a fastener implanting device loaded with surgical fasteners to accomplish in a few seconds what would have taken many minutes to perform by suturing. This reduces blood loss and trauma to the patient.
- Conventional surgical fasteners have been in the form of ordinary metal staples, which are bent by the delivery apparatus to hook together body tissue. Typically, conventional staples comprise a pair of legs joined together at one end by a crown. The crown may be a straight member connecting the legs or may form an apex. Moreover, the legs may extend substantially perpendicular from the crown or at some angle therefrom. Irrespective of the particular configuration, however, conventional staples are designed so that they may be deformed to hold body tissue.
- Accordingly, the stapler applicators have conventionally embodied structure functioning to project the conventional staple into tissue as well as to deform the staple so that it is retained against the tissue. Generally speaking, typical applicators include an anvil cooperating with means to eject the conventional staple from the applicator. In some applications, access to the body tissue from two opposite directions is available and the anvil can operate to deform the legs of the staple after they have passed through the body tissue. In applications where access to the tissue is from only one direction, the anvil may deform the crown of the conventional staple so that its legs will project into the body tissue in a fashion so as to hold the staple against the tissue.
- Since conventional staples require deformation and must cooperate with applicators having an anvil or other means to deform the staples, conventional applicators typically comprise complex structures and can be prohibitively expensive. Conventional applicators must embody structure functioning to not only eject the fasteners but to do so in a manner so that the fastener deforms properly and timely.
- In some applications, conventional applicators must be equipped with structure functioning to move the anvil into and out of position so that when the fastener is ejected from the applicator, the anvil is properly positioned and once fastener deformation is complete, moves out of position, thereby allowing the process to be repeated. Moreover, the anvil must be formed into a proper configuration so that fastener deformation can be repeated accurately. Further, the force between the fastener and the anvil must be controlled so that repeated deformation is accomplished. The objectives of many inventions in this field have been to accomplish these goals by the simple manipulation of a single lever. It is to be appreciated, therefore, that the fastener applicators have become complex and expensive instruments.
- Two part fasteners have also been conventionally utilized, where a barbed staple is used in conjunction with a retaining piece to hold the staple in place. Typically, the two part staple comprises a crown or backspan and two barbed prongs which are engaged and locked into a separate retainer piece. In use, the staple is pressed into the body tissue so that the barbs penetrate the tissue and emerge from the other side where they are then locked into the retainer piece. Retainers prevent the staple from working loose from the tissue. The two piece fasteners cannot be unlocked and are not removable.
- Like other conventional applications, however, the two piece fasteners require the staple delivery apparatus to have access to both sides of the tissue. Thus, as with the other conventional applications, two piece fasteners are limited since they cannot be used where access to tissue is from one direction only.
- In those situations where access to body tissues is limited to one direction, as in grafting procedures, deformable surgical fasteners have been conventionally employed. As mentioned previously, however, the applicators commonly used in these situations embody an anvil cooperating with a fastener to deform it and consequently, tend to be of a complex design.
- Some advancements have been made in this area so that applicators functioning to attach grafts to tissue, for instance, are not required to embody an anvil and may, therefore, have a more simple design. In particular, it has been suggested in the art to employ fasteners with barbs, thereby eliminating the need for deforming the fastener. These fasteners are limited, however, since the path created in the graft and tissue by the barbs as the fastener is pressed into the graft and tissue may allow the fastener to loosen its grip or to entirely back out of engagement. Moreover, due to their sole reliance upon barbs to retain tissue, the barb fasteners are further limited in that they may not have a great enough retentive surface area for securely holding tissue in place.
- To circumvent or overcome the problems and limitations associated with conventional fasteners and applicators, a simple applicator that dispenses a surgical fastener having high surface area for retentive contact with tissue and that can be delivered into body tissue from one direction may be employed. The present invention embodies these characteristics.
- The invention includes a surgical fastener and an applicator used in delivering the fastener into body tissue. The fastener and applicator of the present invention may be used in a number of medical procedures including ligating tissue, hernia mesh repair, bladder neck suspension, and in conjunction with implant drug delivery systems or procedures involving positioning of surgical or implantable devices in a patient's body.
- The preferred embodiment of the surgical fastener of the present invention is formed into the configuration of a continuous helical coil. The continuous helical coil is longitudinally collapsible and expandable. At the distal end of the helical fastener is a point for enhancing penetration into tissue. The proximal end of the helical fastener has a T-bar which sections the diameter of the fastener, thereby providing a surface for receiving and transmitting longitudinal and rotational forces so that the fastener may be driven into tissue by a corkscrew action. The pitch and length of the helical fastener may vary upon the application as can its diameter and configuration of the most proximal and distal coils comprising the fastener. Additionally, the material selection and fastener stiffness may be selected with a particular application in mind.
- In another embodiment of the surgical fastener, the fastener comprises a double continuous helical coil that is also longitudinally collapsible and expandable and may embody various configurations depending upon the application. Moreover, the distal end of the double helical fastener comprises two points for enhancing penetration into tissue and its proximal end comprises a connector bar which connects the two helixes as well as sections the diameter of the double helical fastener. In yet another embodiment, the surgical fastener further comprises a pivot post extending through the center of the fastener and operating to provide the fastener with a stable pivot. In any of the embodiments, one or more barbs may be employed near the point to enhance anchoring characteristics.
- A preferred embodiment of the fastener applicator of the present invention includes a proximal portion and a distal portion. The proximal portion is preferably fabricated to be a “reusable” component and the distal portion a “disposable” component. Alternatively, both the distal and proximal portion can be made disposable. The distal portion is elongate and embodies an outer tube housing an inner rotator, a lock clip/indicator and a load spring. The proximal portion includes a handle. In the preferred embodiment of the distal portion, a thread form comprising an interlock spring is provided within the outer tube. The rotator includes a structure running longitudinally along its length that functions to receive the T-bar or connector bar of the fastener and in this way, the rotator may hold a plurality of fasteners. The load spring applies a force against the lock clip/indicator operating to bias the plurality of springs distally within the outer tube and towards the nose piece. The thread form functions to engage the coils of the helical fasteners and when rotating the rotator, a fastener is driven from the distal end of the applicator. In other embodiments of the applicator, the distal end has various other structures functioning to engage the coils of the fastener and to drive them from the distal end of the applicator. In one other embodiment, the distal end comprises a nose piece protrusion for engaging the fastener.
- In order to cause the rotator to rotate, the proximal portion of the applicator has a handle and an actuator cooperating with the rotator. In a preferred embodiment, the proximal portion of the applicator embodies a lever pivotally attached about a midpoint to the handle. A first end of the lever is configured to be gripped by hand and a second end is adapted to engage a nut driver. The nut driver travels along a helical lead screw which is connected to the rotator. When the lever is squeezed by hand the nut driver travels along the lead screw causing it to rotate, and through the connection of the lead screw to the rotator, the action of the lead screw causes the rotator to rotate.
- Further, the lever comprises a midsection extension. Pivotally attached to the midsection extension of the lever is a spring loaded pawl adapted to releasably engage gear teeth formed in the interior of the handle. The spring loaded pawl prohibits the lever from backstroking until it has been completely depressed. Upon complete depression of the lever, the pawl clears the gear teeth and the spring, biasing the pawl, rotates the pawl away from the teeth, thereby allowing the lever to return to its undepressed condition.
- In another embodiment of the proximal portion of the applicator, the lever is pivotally attached at a first end to the handle, the second end being adapted to engage the nut driver. Further, rather than embodying a spring loaded pawl, this alternate embodiment of the proximal portion includes a clutch assembly or releasable connection between the lead screw and rotator and cooperating means to prohibit the lever from backstroking until it has been completely depressed.
- Other features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principals of the invention.
-
FIG. 1 depicts a perspective view of a fastener of the present invention, illustrating a side view of a helical fastener. -
FIG. 1A depicts another perspective view of the fastener of the present invention, illustrating an end view of the helical fastener. -
FIG. 1B depicts a schematic view of a fastener of the present invention, illustrating a substantially collapsed helical fastener with a relatively small gap that has been partially inserted into tissue. -
FIG. 1C depicts a schematic view of a fastener of the present invention, illustrating the helical fastener depicted inFIG. 1B completely inserted into tissue. -
FIG. 1D depicts a schematic view of a fastener of the present invention, illustrating a substantially collapsed helical fastener with a relatively large gap that has been partially inserted into the tissue. -
FIG. 1E depicts a schematic view of a fastener of the present invention, illustrating the helical fastener depicted inFIG. 1D completely inserted into tissue. -
FIG. 1F depicts a perspective view of another embodiment of the present invention, illustrating an end view of the helical fastener. -
FIG. 2 depicts a perspective view of another embodiment of the present invention, illustrating a double helical fastener. -
FIG. 2A is a front view of the double helical fastener ofFIG. 2 . -
FIG. 2B is side view of the double helical fastener ofFIG. 2 . -
FIG. 2C is a top view of the double helical fastener ofFIG. 2 . -
FIG. 3 is a perspective view of yet another embodiment of the present invention, illustrating another design of a double helical fastener. -
FIG. 3A is a front view of the double helical fastener ofFIG. 3 . -
FIG. 3B is a side view of the double helical fastener ofFIG. 3 . -
FIG. 3C is a top view of the double helical fastener ofFIG. 3 . -
FIG. 4 is a perspective view of the present invention, illustrating a helical fastener with a central post. -
FIG. 5 depicts a schematic cross-sectional view of an applicator of the present invention, illustrating a side view of the applicator. -
FIG. 6 is a schematic cross-sectional side view of a terminal end of the applicator. -
FIG. 6A is a schematic cross-sectional end view of a terminal end of the applicator. -
FIG. 7 is a schematic cross-sectional view of the terminal end of the applicator, illustrating the preferred embodiment of the terminal end. -
FIG. 7A is a schematic cross-sectional end view of the preferred embodiment of the terminal end of the application shown inFIG. 7 . -
FIG. 8 is a schematic cross-sectional view of the terminal end of the applicator, illustrating another embodiment of the terminal end. -
FIG. 8A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown inFIG. 8 . -
FIG. 9 is a schematic cross-sectional view of the terminal end of the applicator, illustrating yet another embodiment of the terminal end. -
FIG. 9A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown inFIG. 9 . -
FIG. 10 is a schematic cross-sectional view of the terminal end of the applicator, illustrating still yet another embodiment of the terminal end. -
FIG. 10A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown inFIG. 10 . -
FIG. 11 is a schematic cross-sectional view of the terminal end of the applicator, illustrating another embodiment of the terminal end. -
FIG. 11A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown inFIG. 11 . -
FIG. 12 is a schematic cross-sectional view of the terminal end of the applicator, illustrating a further embodiment of the terminal end. -
FIG. 12A is a schematic cross-sectional end view of the embodiment of the terminal end of the applicator shown inFIG. 12 . -
FIG. 13 is a schematic cross-sectional view of the terminal end of the applicator, illustrating a still further embodiment of the terminal end. -
FIG. 14 is a schematic cross-sectional view of the terminal end of the applicator, illustrating still yet another embodiment of the terminal end. -
FIG. 15 . is a schematic cross-sectional view of another applicator of the present invention, illustrating a side view of the applicator. -
FIG. 16 is a schematic partial cross-sectional view of a releasable connection between the lead screw and rotator. -
FIG. 16A is schematic representation of a distal end of the lead screw, illustrating an end view of the lead screw. -
FIG. 16B is a schematic representation of the distal end of the lead screw, illustrating a side view of the lead screw depicted inFIG. 16 . -
FIG. 16C is a schematic representation of the proximal end of the rotator, illustrating a side view of the rotator. -
FIG. 16D is a schematic representation of the proximal end of the rotator, illustrating an end view of the rotator depicted inFIG. 16B . - As is shown in the drawings, which are included for purposes of illustration and not by way of limitation, the invention is embodied in a continuous helical fastener and an applicator therefor. The helical fastener has a high retentive surface area and the applicator has a simple design and functions to dispense the helical fasteners, without substantially deforming the fasteners, into body tissue, access to which is from one direction only. Some conventional fasteners require deformation to hold tissue and are consequently limited since they require complex applicators to attach them into tissue. Other conventional fasteners lack high retentive surface area for securely holding tissue. Still other fastener/applicator systems require access to tissue from two directions in order to accomplish attaching a fastener to tissue. Thus, the helical fastener and applicator of the present invention provides a superior means to attach fasteners to tissue.
- One embodiment of the present invention (
FIGS. 1, 1A and 5) is embodied in ahelical fastener 10 which is attached to tissue by employing anovel applicator 12 which rotates thefastener 10 into tissue. The dimensions and physical characteristics of thehelical fastener 10 are selected to insure a secure attachment of thefastener 10 to tissue. Similarly, the dimensions and physical characteristics of theapplicator 12 utilized to dispense thefasteners 10 into tissue are dependent upon the application. - In a preferred embodiment, the
fastener 10 is formed into the configuration of a continuous helix and may have adepth 16, adiameter 18 and apitch 20 determined by the application. The continuous helix may be longitudinally collapsible and expandable. The cross-sectional profile of the continuous helix is substantially circular in the preferred embodiment but can be square, rectangular or triangular. In a particular application such as mesh anchoring for hernia repair, the pre-formed pitch can be 0.050 inches. However, the pre-formed pitch can vary from 0 to a maximum of approximately 3.0 times the coil diameter. In other embodiments, it is contemplated that thepitch 20 vary along the length of thefastener 10 so as to optimize the retaining force of thefastener 10. Moreover, since the continuous helical coil is preferably longitudinally collapsible and expandable, upon insertion into tissue, thefinal pitch 31 may be less than or greater than the pre-formed pitch. If the coil is made of rigid construction, as is also contemplated, pitch would be made substantially fixed. The diameter in the preferred embodiment may be 5 mm; however, designs ranging from 1 mm and up are contemplated. In practice, thedepth 16 of thefastener 10 must be selected so that the extent of fastener penetration into tissue is sufficient to hold thefastener 10 in place. - Moreover,
distal end 22 of thefastener 10 is to be configured such that agap 23 exists between the most distal coil 27 (or first coil) of thefastener 10 and its adjacent coil. As may be appreciated from the preferred embodiment ofFIGS. 1B through 1E , as thefastener 10 is pressed againsttissue 25, all of the coils substantially collapse except the mostdistal coil 27, leaving thegap 23 to determine the path thefastener 10 takes as it is rotated into thetissue 25 and more importantly, the extent ofpenetration 29 into thetissue 25 andfinal pitch 31 of thefastener 10 in tissue. AlthoughFIG. 1B shows substantially all of the coils being collapsed, it is to be appreciated that, depending upon the applicator utilized to implant thefastener 10, fewer coils than all of the coils may be collapsed at any one time. It remains, however, that since thefastener 10 is longitudinally collapsible and expandable, it is thegap 23 that generally determinesfinal pitch 31. Accordingly, the magnitude of thegap 23 can be varied, depending upon the application, to achieve the desiredfinal pitch 31 andpenetration 29 in tissue. Thus, the greater thegap 23, upon insertion of thefastener 10 in tissue, the greater thepenetration 29 andfinal pitch 31 of thefastener 10 in tissue. - In the preferred embodiment, the
distal end 22 of thehelical fastener 10 terminates with apoint 24. Thepoint 24 may be sharp or blunt depending upon the tissue to which thefastener 10 will be affixed. Additionally, one or more barbs or a sharp point projecting in reverse direction to point 24 (not shown) can be added tofastener 10near point 24 to enhance anchoring characteristics of the fastener. Aproximal end 26 of thehelical fastener 10 may comprise structure functioning to receive and transmit applied longitudinal forces. In the preferred embodiment, the most proximal coil is formed into a T-bar 33 that perpendicularly sections thediameter 18 of thefastener 10. In alternate embodiments, it is also contemplated that the most proximal coil section thediameter 18 non-perpendicularly or be formed into a spiral 35 existing in a single plane (SeeFIG. 1F ). - Concerning the material of the
helical fastener 10, it is contemplated in the preferred embodiment that the fastener be made from semi-stiff implantable wire, such as titanium, wound into a helical shape. In alternate embodiments, thehelical fastener 10 may comprise plastic or absorbable materials. Examples of materials that can be used in constructing thehelical fastener 10 include titanium, titanium alloys, stainless steel, nickel, chrome alloys and any other biocompatible implantable metals. Other options for materials are liquid crystal polymers, HDPE, polyglycolic acid, and polyglycolid hydroxgacetic acid. Further, it may also be desirable to coat the fastener, or a portion thereof, with a biocompatible lubricious material that provides for easier delivery of the fastener into tissue. - In another embodiment of the surgical fastener, the
fastener 110 is formed into the configuration of a double helix (SeeFIGS. 2-2C ). By embodying a double helix, thefastener 110 has increased retentive strength as well as means to balance thefastener 110 as it is pressed into tissue. As with thehelical fastener 10, the configuration of the doublehelical fastener 110, i.e., the pre-formed pitch and diameter, may be varied for a particular application and a barb may be employed to enhance anchoring in tissue. Moreover, the materials contemplated are the same as those for the helical fasteners. Further, the doublehelical fastener 110 is also longitudinally collapsible and expandable and its final pitch is dependent upon thegap 112 existing between the mostdistal coils fastener 110 and their adjacent coils. - Regarding the proximal 118 and distal 120 ends of the double
helical fastener 110, they comprise structure to drive the fastener into tissue as well as tissue piercing structures. Theproximal end 118 has aconnector bar 122 sectioning the diameter of the fastener that connects one helical coil to another and functions to receive and transmit longitudinal forces. Thedistal end 120 terminates with twopoints fastener 110 into tissue. - As may be appreciated by comparing
FIGS. 2-2D withFIGS. 3-3D , it is contemplated that the doublehelical fastener 110 have a full turn design (FIG. 22D ) as well as a half turn design (FIGS. 3-3D ). It is to be understood, however, that the designs having more than one turn and having other increments of turns are contemplated. It is the applicator that will determine the required number of turns for aspecific fastener 110. - In yet another embodiment of the surgical fastener, as shown in
FIG. 4 , the doublehelical fastener 110 is provided with apivot post 130 having a pointedterminal end 132. Thepivot post 130 of this embodiment operates to provide thefastener 110 with a stabilizing element so that, as thefastener 110 is being turned, the helical coils cooperatively enter the tissue. - The applicator 12 (
FIG. 5 ) comprises aproximal portion 28 having ahandle 30 and anactuator 32 and a cooperating elongated distal portion orcannula 34 housing a plurality of fasteners. In general, through the manipulation of theactuator 32, the fasteners are ejected, one by one, out of adistal portion 34 and into body tissue. Theapplicator 12, hereinafter described in more detail, is equally proficient in driving each of the embodiments of fasteners set forth above into tissue. - In more detail (See
FIGS. 6 and 6 A), thedistal portion 34 comprises anouter tube 36 housing arotator 38, a lock/clip indicator 40 and aload spring 42. Extending longitudinally along therotator 38 is agroove 44 which operates to receive the most proximal coil sectioning the fastener. AlthoughFIG. 6 shows only a single fastener (having a single helical design) retained by therotator 38, it is to be appreciated that therotator 38 may receive a plurality of fasteners (having a single or double helical design), wherein each fastener has its last coil positioned within therotator groove 44. Moreover, although not depicted inFIG. 3 , it is also contemplated that rather than embodying a groove, therotator 38 has a cross-sectional profile approximately a “D”, wherein the flat portion operates to engage the coil sectioning the fasteners. Irrespective of the configuration of the rotator, however, the rotator is to embody structure functioning to engage a plurality of fasteners and to facilitate turning them into tissue. - It is also to be appreciated that
load spring 42 applies a force through thelock clip indicator 40 to bias the plurality of fasteners distally. The lock clip/indicator 40 may comprise a simple washer sized and shaped to engage the fasteners androtator 38 as well as to receive forces from theload spring 42. Additionally, lock/clip indicator 40 serves as a jam stop to prevent further actuation byrotator 38 upon discharge of all fasteners by mating with, or abutting against, structure comprising theterminal end 50 and preventing further rotation. Lock/indicator 40 can be made of a color (or shape) to serve as an empty indicator notifying the user that no more fasteners are available. Other embodiments of theindicator 40 may be utilized as long as they function to transmit forces to bias the fasteners distally. Theload spring 42 is to be retained within theouter tube 36 and to have physical characteristics such that sufficient forces may be applied through afront end 43 to a last remaining fastener contained within theapplicator 12. A back end (not shown) of theload spring 42 may be placed against any stationery structure within theouter tube 36, thereby providing a foundation against which thespring 42 may be compressed. In a preferred embodiment, theload spring 42 extends substantially the length of thedistal portion 34. - In the preferred embodiment (
FIGS. 7 and 7 A), theouter tube 36 is configured with athread form 201 comprising aninterlock spring 203 fixedly retained within theouter tube 36 and extending substantially the length thereof. Theinterlock spring 203 may be fixedly retained within theouter tube 36 by ensuring a tight interference between the parts or the interlock spring may be spot welded or equivalently bonded within the outer tube. Thethread form 201 operates to guide the fasteners through thedistal portion 34 and to eject them from theapplicator 12. - In another embodiment of the applicator 12 (
FIGS. 8 and 8 A), attached at aterminal end 46 of thedistal portion 34 may be anose piece 48. Thenose piece 48 may further comprise aprotrusion 50 extending perpendicularly and towards a longitudinal axis 52 of thedistal portion 34. Thisnose piece protrusion 50 also functions to engage the surgical fasteners and to force them from theterminal end 46 of thedistal portion 34 as well as engaging lock/clip indicator 40 as described above. - In other embodiments of the
applicator 12, the distal portion embodies other structure or thread forms functioning to engage the surgical fasteners and guide them out of the applicator and into tissue (SeeFIGS. 9-14 ). InFIGS. 9 and 9 A, theouter tube 36 is rolled at itsterminal end 46 and a 180 DEG portion of the rolled terminal end is cut away. The remaining rolled portion engages the fastener while the portion cut away provides an exit for the fasteners. The embodiment depicted inFIGS. 10 and 10 A is similar to that ofFIGS. 9 and 9 A, the difference being that instead of removing a portion of the rolledterminal end 46, it is stamped or deformed to thereby provide an exit.FIGS. 11 and 11 A show yet another embodiment, wherein two longitudinally spaced apart stabilizingpoints FIGS. 12, 12A , 13 and 14, they each comprise aterminal end 46 formed with threads which operate to engage and eject a fastener. InFIGS. 12 and 12 A are depicted threads machined or formed solely within the inside of the outer tube.FIG. 13 shows an internally threaded sleeve attached to the outside of theterminal end 46 of theouter tube 36.FIG. 14 illustrates anapplicator 12 provided with aterminal end 46 deformed so as to have internal and external threaded structures. Irrespective of the design chosen for the terminal end of the applicator, however, each of the designs are effective with a relatively small overall outer diameter, i.e., on the order of 5 mm. - In order to eject surgical fasteners from the
distal portion 34, the actuator 32 functions to turn therotator 38. As the rotator turns, thedistal end 22 of a fastener is threaded out of theterminal end 46 of the applicator 12 (seeFIG. 5 ). - In the preferred embodiment of the
proximal portion 28 of the applicator 12 (SeeFIG. 5 ), alever 54 is pivotally connected about amidpoint 56 to thehandle 30. Afirst end 58 of thelever 54 is to be configured for gripping by hand. Asecond end 60 of the lever is to be adapted to pivotally engage anut driver 62. - The
nut driver 62 of theapplicator 12 travels upon a highhelix lead screw 64 which is rotatably mounted within theproximal portion 28. In the preferred embodiment, a longitudinal axis of the highhelix lead screw 64 is coaxial with the longitudinal axis 52 extending through thedistal portion 34 of theapplicator 12. Upon manipulation of thelever 54, thenut driver 62 travels along thelead screw 64 causing it to rotate through a connection of thelead screw 64 to therotator 38, the action of the lead screw causes the rotator to rotate. Thelead screw 64 may be connected to therotator 38 by any conventional means. For instance, thelead screw 64 can have an internal bore receiving and engaging an end of therotator 38. Further, the length of travel of thenut driver 62 along thelead screw 64 is chosen such that it causes the rotator to rotate a predetermined number of times so that a singlehelical fastener 10 is ejected from theapplicator 12. - Additionally, in the preferred embodiment, the lever further comprises a
midsection extension 66. Pivotally attached to themidsection extension 66 of thelever 54 is contemplated to be a spring loadedpawl 68 adapted to releasably engage gear teeth 70 formed in the interior of thehandle 30. Spring loadedpawl 68 is configured to prohibit thelever 54 from backstroking until it has been completely depressed. Upon complete depression of thelever 54, thepawl 68 clears the gear teeth 70 and the spring biasing thepawl 68 rotates thepawl 68 away from the teeth 70, thereby allowing thelever 54 to return to its undepressed condition. - In operation, upon complete depression of the
lever 54, thenut driver 62 travels a pre-determined distance along thelead screw 64, causing therotator 38 to rotate a pre-determined number of revolutions corresponding to a number of turns of a particularhelical fastener 10. As therotator 38 rotates, the fasteners retained by the rotator also rotate and the coils of the most distal fastener are threaded out of theterminal end 46 of theapplicator 12 and into tissue. Moreover, where thelever 54 is only partially depressed, the spring loadedpawl 68 operates to hold thelever 54 stationery and will continue to function to hold thelever 54 stationery until thelever 54 has been completely depressed. In this way, the delivery of fasteners into body tissue is controlled so that only a single fastener may be completely ejected out of theapplicator 12 and pressed into body tissue at a time. - In the preferred embodiment, the
proximal portion 28 is fabricated to have a reusable handle that can be re-sterilized, and the distal portion is made disposable. Thus, upon discharge of all thefasteners 10 fromdistal portion 34, the distal portion would be discarded and replaced. The handle could be reused up to a limited number of procedures. - In another embodiment of the
proximal portion 328, of the applicator 312 (FIG. 15 ), alever 354 is pivotally connected at afirst end 355 to thehandle 330 and biased to its undepressed position by aspring 357. Themid-section 358 of the lower 354 is configured for gripping by hand. Asecond end 360 of the lever is to be adapted to pivotally engage anut drive 362. - The
nut driver 362 of theapplicator 312 travels along a high helixlead screw 364 which is rotatably mounted within theproximal portion 328. Upon manipulation of thelever 354, the nut driver travels along thelead screw 364 causing it to rotate and, through a clutch assembly or a releasable connection of thelead screw 364 to therotator 38, the action of the lead screw causes the rotator to rotate. - Further, the
lever 354, has amid-section extension 366 that cooperates with a spring biasedlatch pawl mechanism 368 fixed to the handle adapted to releasably engageteeth 370 formed on themid-section extension 366. The spring biased latch pawl is configured to prohibit thelever 354 from backstroking until it has been completely depressed. Upon complete depression of thelever 354, thelatch pawl 368 clears themid-section teeth 370 and the springbiased latch pawl 368 rotates away from the teeth, thereby allowing thelever 354 to return to its undepressed condition. - As stated, there is a releasable connection between the
lead screw 364 and the rotator. The releasable connection provides the applicator with means to disengage the distal portion of the applicator from the proximal portion. In this way, the proximal portion can be re-used with various different designs of the proximal portion. Further, while thelever 354 is being depressed, the clutch assembly or releasable connection functions to transfer the rotation of thelead screw 364 to therotator 38, thereby causing the rotator to rotate. Additionally, upon complete depression of the lever, the clutch assembly operates to allow relative motion of thelead screw 364 and the rotator. - One such releasable connection contemplated is a conventional ratchet mechanism. As shown in
FIGS. 16-16D , thedistal end 370 of thelead screw 364 has a connectingsurface 372 equipped withleaf springs face 377 and aninternal bore 378 existing coaxially with a longitudinal axis of the lead screw. Theproximal end 380 of therotator 38 has a cooperating connectingsurface 382 havingridges 384 for releasable engagement with theleaf springs extension 386 adapted to fit within the internal bore of the lead screw connecting surface. As may be appreciated from the FIGS., as the lead screw turns so that theridges 384 contact the engaging faces 377 of theleaf springs lead screw 364 will cause therotator 38 to likewise rotate. Where the lead screw is turned in the opposite direction, theridges 384 will not engage the engaging face of the leaf springs and the motion of thelead screw 384 will not be transferred to therotator 38. - In this embodiment, upon complete depression of the
lever 354, thenut driver 362 travels a pre-determined distance along thelead screw 364, causing therotator 38 to rotate a pre-determined number of revolutions. As therotator 38 rotates, the fasteners retained by the rotator also rotate and the coils of the most distal fasteners are threaded out of the applicator and into the tissue. At this point, thelatch pawl mechanism 368 disengages from theteeth 370 and thelever 354 is returned to its undepressed position byspring 357. As with the previous embodiment of theproximal portion 28, the proximal portion of this embodiment functions to allow only a single fastener to be completely ejected from the applicator and be pressed into body tissue at a time. - In other embodiments, means to cause the rotator to rotate may comprise a single knob connected to a rotator which can be turned by hand. Additionally, the revolving means may include a rack and gear structure or a set of beveled gears. Further, instead of comprising a groove, the rotator may be internally threaded, wherein the threaded portions function to house as well as advance the
helical fasteners 10. Irrespective of the means or structure employed, however, it is contemplated that the number of revolutions of the rotator be set to a pre-determined parameter so that the delivery of helical fasteners to tissue may be controlled. - From the foregoing, it will be appreciated that the helical fastener in applicator of the present invention functions to securely attach a fastener with high retentive surface area to tissue from one direction through the utilization of an applicator having a simple design. It is also to be appreciated that the present invention may be utilized in a number of applications including ligating tissue, hernia mesh repair, bladder neck suspension, and in conjunction with implant drug delivery systems or procedures involving positioning of surgical or implantable devices in patient.
- While several particular forms of the invention have been illustrated and described, it will also be apparent that various modifications can be made without departing from the spirit and scope of the invention.
- Thus, it should be understood that various changes in form, detail and application of the present invention may be made without departing from the spirit and scope of this invention.
Claims (17)
Priority Applications (1)
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US11/978,893 US20080097523A1 (en) | 1994-08-05 | 2007-10-30 | Surgical helical fastener with applicator |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
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US08/286,878 US5582616A (en) | 1994-08-05 | 1994-08-05 | Surgical helical fastener with applicator |
US08/499,279 US6296656B1 (en) | 1994-08-05 | 1995-07-07 | Surgical helical fastener with applicator |
US09/968,100 US6562051B1 (en) | 1994-08-05 | 2001-10-01 | Surgical helical fastener with applicator |
US10/330,903 US6884248B2 (en) | 1994-08-05 | 2002-12-27 | Surgical helical fastener with applicator |
US10/755,427 US8579919B2 (en) | 1994-08-05 | 2004-01-12 | Surgical helical fastener with applicator |
US11/978,893 US20080097523A1 (en) | 1994-08-05 | 2007-10-30 | Surgical helical fastener with applicator |
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US10/755,427 Continuation US8579919B2 (en) | 1994-08-05 | 2004-01-12 | Surgical helical fastener with applicator |
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US08/286,878 Expired - Lifetime US5582616A (en) | 1994-08-05 | 1994-08-05 | Surgical helical fastener with applicator |
US08/499,279 Expired - Lifetime US6296656B1 (en) | 1994-08-05 | 1995-07-07 | Surgical helical fastener with applicator |
US08/772,143 Expired - Lifetime US5810882A (en) | 1994-08-05 | 1996-12-20 | Surgical helical fastener with applicator and method of use |
US08/812,958 Expired - Lifetime US5964772A (en) | 1994-08-05 | 1997-03-05 | Applicator for attaching fasteners to tissue |
US08/812,959 Expired - Lifetime US5824008A (en) | 1994-08-05 | 1997-03-05 | System for applying fasteners to tissue |
US09/968,100 Expired - Fee Related US6562051B1 (en) | 1994-08-05 | 2001-10-01 | Surgical helical fastener with applicator |
US10/330,903 Expired - Fee Related US6884248B2 (en) | 1994-08-05 | 2002-12-27 | Surgical helical fastener with applicator |
US10/755,427 Expired - Fee Related US8579919B2 (en) | 1994-08-05 | 2004-01-12 | Surgical helical fastener with applicator |
US11/978,893 Abandoned US20080097523A1 (en) | 1994-08-05 | 2007-10-30 | Surgical helical fastener with applicator |
Family Applications Before (8)
Application Number | Title | Priority Date | Filing Date |
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US08/286,878 Expired - Lifetime US5582616A (en) | 1994-08-05 | 1994-08-05 | Surgical helical fastener with applicator |
US08/499,279 Expired - Lifetime US6296656B1 (en) | 1994-08-05 | 1995-07-07 | Surgical helical fastener with applicator |
US08/772,143 Expired - Lifetime US5810882A (en) | 1994-08-05 | 1996-12-20 | Surgical helical fastener with applicator and method of use |
US08/812,958 Expired - Lifetime US5964772A (en) | 1994-08-05 | 1997-03-05 | Applicator for attaching fasteners to tissue |
US08/812,959 Expired - Lifetime US5824008A (en) | 1994-08-05 | 1997-03-05 | System for applying fasteners to tissue |
US09/968,100 Expired - Fee Related US6562051B1 (en) | 1994-08-05 | 2001-10-01 | Surgical helical fastener with applicator |
US10/330,903 Expired - Fee Related US6884248B2 (en) | 1994-08-05 | 2002-12-27 | Surgical helical fastener with applicator |
US10/755,427 Expired - Fee Related US8579919B2 (en) | 1994-08-05 | 2004-01-12 | Surgical helical fastener with applicator |
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EP (10) | EP0834285B1 (en) |
JP (2) | JP3691851B2 (en) |
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DE (7) | DE69531746T2 (en) |
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WO (1) | WO1996003925A1 (en) |
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