CA1317180C - Method and apparatus for applying anastomis device - Google Patents
Method and apparatus for applying anastomis deviceInfo
- Publication number
- CA1317180C CA1317180C CA000548389A CA548389A CA1317180C CA 1317180 C CA1317180 C CA 1317180C CA 000548389 A CA000548389 A CA 000548389A CA 548389 A CA548389 A CA 548389A CA 1317180 C CA1317180 C CA 1317180C
- Authority
- CA
- Canada
- Prior art keywords
- fingers
- anvil
- anvil assembly
- assembly
- set forth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title description 3
- 230000033001 locomotion Effects 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 230000003872 anastomosis Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 210000000936 intestine Anatomy 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 239000003356 suture material Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B17/115—Staplers for performing anastomosis in a single operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/11—Surgical instruments, devices or methods, e.g. tourniquets for performing anastomosis; Buttons for anastomosis
- A61B17/115—Staplers for performing anastomosis in a single operation
- A61B17/1155—Circular staplers comprising a plurality of staples
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A surgical stapling apparatus for applying a surgical fastener is disclosed. In particular, a two-part surgical fastener composed of an annular stapling part having projecting prongs and annular retaining board having an annular gap which receives the prongs. Barbs on the prongs serve to abut against a retaining ring on the retaining part to maintain a fixed relationship between the parts for stapling purposes. The surgical stapling apparatus comprises an anvil assembly on which the retaining part of the fastener is mounted as fingers which can be collapsed radially inwardly after stapling to permit ease of removal.
A surgical stapling apparatus for applying a surgical fastener is disclosed. In particular, a two-part surgical fastener composed of an annular stapling part having projecting prongs and annular retaining board having an annular gap which receives the prongs. Barbs on the prongs serve to abut against a retaining ring on the retaining part to maintain a fixed relationship between the parts for stapling purposes. The surgical stapling apparatus comprises an anvil assembly on which the retaining part of the fastener is mounted as fingers which can be collapsed radially inwardly after stapling to permit ease of removal.
Description
`- 1317180 This invention relates to a surgical stapling apparatus.
Heretofore, various types of surgical stapling devices have been known wherein a stapling function takes place at a location which is relatively remote from the location at which the stapling device is held and actuated by an operator. For example, linear closure surgical stapler devices are described in U.S. Patent 3,494,533 and circular anastomosis surgical stapler devices are described in U.S. Patents 4,304,236; 4,351,466; 4,473,077 and 4,488,523 as well as U.S. Design Patents 273,041 and 271,944~ Typically, the stapling devices described in these patents operate by placing tissue to be stapled in a clamped manner between an anvil assembly and a fastener holding assembly, both of which are located at the distal end of the instrument. The clamped tissue is stapled by driving one or more fasteners from the holding assembly so that the ends of the fasteners pass through the tissue and are formed properly by contact with the anvil assembly.
The forces required to operate the instrument are applied by the operator of the instrument to one or more actuator elements located at or near the proximal end of the instrument. The distal and proximal portions of the instrument are joined by a longitudinal connecting shaft structure along which the actuating forces and motions are transmitted to the distal operation elements. This type of construction, including relatively widely spaced distal and proximal portions, may be employed for any of se.veral reasons, such as the relative inaccessibility of the tissue to be stapled, the need for good visibility of the tissue during stapling, and the like. These known types of surgical stapler devices generally use a plurality of small and discrete fasteners re~uiring precise registration with the anvil assembly to ensure that proper fastener formation occurs during the stapling operation.
~9~
Accordingly, it is an object of the invention to provide a surgical stapling apparatus for applying a unitary surgical fastener having a multiplicity of fasteniny points.
It is another object o the invention to eliminate the need for a plurality of precisely registered small and discrete fasteners in anastomosis stapling devices.
It is another object of the invention to provide a surgical stapler which can be easily and quickly installed in tissue by a surgical stapling apparatus.
It is another object of the invention to provide a surgical stapling apparatus with an anvil head capable of functioning with a unitary surgical fastener.
It is another object of the invention to eliminate the need for a high degree of rotational accuracy in the registration of a fastener holder relative to an anvil assembly in an anastomosis stapling device.
Accordingly, the present invention provides an anvil assembly for the mounting of a surgical fastener.
The anvil assembly includes a plurality of radiating fingers which extend angularly of a longitudinal axis, an annular cutting block which is removably mounted on the fingers for engagement with an annular knife blade and means for biasing the fingers radially inwardly of the block in order to permit movement of the fingers radially inwardly in response to removal of the cutting block from the fingers. In one embodiment, the fingers are integral with a central hub and are resiliently deformable while the means for biasing the fingers inwardly constitutes an anvil head having an internal wall receiving the anvil with the fingers abutting the wall and a retainer which is movably mounted within the anvil head and anvil in order to abut the hub and tension the resilient fingers radially inwardly. In another embodiment, the anvil head has an annular recess while each finger is separately mounted .~
1 3 `1 7 1 ~ () within the recess. In this embodiment, means for biasing the fingers includes an axially movable retainer ring concentrically within the fingers and mounted on the anvil head and a circular spring encompassing the fingers within the recess of the anvil head in order to bias the ~ingers onto the retainer ring. In addition, each finger is provided with a recess so as to receive the retainer ring after axial movement of the ring in order to permit inward radial movement of the fingers under the action of the circular spring.
A surgical fastener to be mounted upon said anvil assembly may suitably be comprised of: 1) an annular stapling part having a plurality of axially extending circumferentially spaced prongs each of which has a sharp tip for piercing tissue; 2) an annular retaining part with an annular gap for receiving the prongs of the stapling part; and 3) catch means for holding the prongs in the retaining part in order to clamp pierced tissue therebetween. For example, the catch means may include a radially extending barb on at least one of the prongs and a retaining ring on the retaininy part for butting of each barb thereon.
The retaining ring may also include a cylindrical guide wall about the retaining ring in order to define an annular gap to receive the prongs of the stapling part.
Suitable means are also provided for securing the guide wall to the retaining ring.
The invention also provides a surgical stapling apparatus which is comprised of a central shaft, an anvil assembly mounted on the distal end of the shaft and a surgical fastener holding assembly mounted on the shaft for relative movement with the anvil assembly to releaseably retain two ends of tubular tissue therebetween. In this regard, the anvil assembly includes a plurality of radiating fingers extending angularly outwardly of the shaft, an annular cutting block removably mounted on the - 13171~0 fingers and means for biasing the fingers radially inwardly of the block. The holding assembly încludes an annular knife blade coaxially opposite the cutting block for severing tissue disposed therebetween. This blade also has an edge for penetrating and holding the block thereon whereby upon movement of the holding assembly and the anvil assembly from each other, the block is removed ~rom -the fingers to permi~ the fingers to move radially inwardly for passage through a stapled seam between the two ends of the tissue.
The aforesaid stapling apparatus permits the user to staple the tubular ends of a pair of vessels together by following the steps of clamping the tubular ends of the vessels between an anvil assembly and a surgical fastener holding assembly, driving an annular stapling part through the clamped ends of the tissue into an annular retaining part removably supported on the anvil assembly and severing the clamped ends on a circular cutting line disposed radially within the stapling part. Subsequently, the anvil assembly may be moved away from the stapled ends of the tissue to withdraw the anvil assembly from the annular retaining part, thereafter, collapsing the anvil assembly radially inwardly of the retaining part and the cutting line and then withdrawing the stapling , ~
1 3 1 7 ~ ~0 1 apparatus from the stapled-to~ether vessels~
These and other ob~ects and advantages of the 3 invention will become more apparent fxom the following 1~ detailed description taken in conjunction with the accompanving drawings wherein:
6 Fig. 1 illustrates a perspective view of a surgical 7 stapling appara~us constructed in accorflance with the invention ~3 in place within an intes~ine;
g Fig. 2 illustrates a ~erspective view of the distal 1~ end of the stapling apparatus prior to fastening;
11 Fig. 3 illustrates a view similar to Fig. 2 of the 12 distal end of the stanling apparatus during a staplinq 13 operation;
14 Fig. 4 illustrates a part sectional side view of the ~pparatus of Fig~ l;
lZ Fig. 5 illustrates an exploded view of the distal ~7 end of the apparatus of Fig. l;
18 Pig. 6 illustrates an exploded view of a surgical 19 ~astener, anvil assembly and holding assembly in accoxdance with the invention;
21 Fig. 7 illustrates a front view of an annular retaining 22 part in accordance with the invention;
23 Fig. 8 illustrates a front view of an annular stapling 24 part in accordance with the invention;
Fig. 9 illustrates an exploded view of the retaining 26 part and stapling part in accordance with the invention:
27 Fig. lG illustrates side views of the retaining part 28 and stapling part of Fig. 9;
29 Fig. 11 illustrates a view of the distal end of the 3 surgical stapling apparatus prior to stapling;
_5 _ 1 ~ 1 7 1 ~0 ~ Fig. 12 illustrates a cross sectional view of the 2 stapling components of the apparatus during an initial phase ~f stapling;
Fig. 13 illus~ra-tes a view similar to FigO 12 of the ~, stapling components after stapling;
Fig. 14 illustrates a view similar to Figs~ 12 and 13 7 during withdrawal of the anvil assemblv;
rO Fig. 15 illustrates an exploded view of the distal end g of a surgical apparatus employing a modlfied anvil assembly in accordance with the assembly~
1~ Fig. 16 illustrates a cross sectional view of the 12 distal end of the surgical apparatu- employing the anvil 13 assembly of Fig. 15 during a stapling operation;
14 Fig. 17 illustrates a view similar to Fig. 16 of the apparatus after stapling; and 1~ Fig. 18 illustrates a view similar to Figs. 16 and 17 17 after collapsing of the anvil assembly in accordance with the 18 invention.
19 Referring to Figs. 1 and 4, the surgical stapling ~o apparatus 1 is used, for example for ~he stapling of two ~1 ends 2, 4 of an in-testine wherein a section of the intestine ~ has been surgically removed between cut ends 6, 8. As 23 indicated in Fig. 1, the cut ends 6, 8 of the intestine are 24 generally tied with suture material 10, 12 with conventional purse-string suturing being used.
26 The staplin~ apparatus 1 includes a shaft 14 and a 27 hand screw 16 which is articulated to the shaft 14 in order to 28 move the shaft 14. As indicated in Fig. 4, the apparatus 1 29 includes an anvil assembly 17 which is mounted on a distal end of the shaft 14 and includes an anvil 18 which faces a surgical 1 ~1 7 1 ~0 1 fastener holding assembly 20 which is also mounted on the 2 shaft 14 fo~ ~elative movement with the anvil assemblv 17 to 3 maintain the two ends of the intestine areas 22, 2~ therebetween.
Heretofore, various types of surgical stapling devices have been known wherein a stapling function takes place at a location which is relatively remote from the location at which the stapling device is held and actuated by an operator. For example, linear closure surgical stapler devices are described in U.S. Patent 3,494,533 and circular anastomosis surgical stapler devices are described in U.S. Patents 4,304,236; 4,351,466; 4,473,077 and 4,488,523 as well as U.S. Design Patents 273,041 and 271,944~ Typically, the stapling devices described in these patents operate by placing tissue to be stapled in a clamped manner between an anvil assembly and a fastener holding assembly, both of which are located at the distal end of the instrument. The clamped tissue is stapled by driving one or more fasteners from the holding assembly so that the ends of the fasteners pass through the tissue and are formed properly by contact with the anvil assembly.
The forces required to operate the instrument are applied by the operator of the instrument to one or more actuator elements located at or near the proximal end of the instrument. The distal and proximal portions of the instrument are joined by a longitudinal connecting shaft structure along which the actuating forces and motions are transmitted to the distal operation elements. This type of construction, including relatively widely spaced distal and proximal portions, may be employed for any of se.veral reasons, such as the relative inaccessibility of the tissue to be stapled, the need for good visibility of the tissue during stapling, and the like. These known types of surgical stapler devices generally use a plurality of small and discrete fasteners re~uiring precise registration with the anvil assembly to ensure that proper fastener formation occurs during the stapling operation.
~9~
Accordingly, it is an object of the invention to provide a surgical stapling apparatus for applying a unitary surgical fastener having a multiplicity of fasteniny points.
It is another object o the invention to eliminate the need for a plurality of precisely registered small and discrete fasteners in anastomosis stapling devices.
It is another object of the invention to provide a surgical stapler which can be easily and quickly installed in tissue by a surgical stapling apparatus.
It is another object of the invention to provide a surgical stapling apparatus with an anvil head capable of functioning with a unitary surgical fastener.
It is another object of the invention to eliminate the need for a high degree of rotational accuracy in the registration of a fastener holder relative to an anvil assembly in an anastomosis stapling device.
Accordingly, the present invention provides an anvil assembly for the mounting of a surgical fastener.
The anvil assembly includes a plurality of radiating fingers which extend angularly of a longitudinal axis, an annular cutting block which is removably mounted on the fingers for engagement with an annular knife blade and means for biasing the fingers radially inwardly of the block in order to permit movement of the fingers radially inwardly in response to removal of the cutting block from the fingers. In one embodiment, the fingers are integral with a central hub and are resiliently deformable while the means for biasing the fingers inwardly constitutes an anvil head having an internal wall receiving the anvil with the fingers abutting the wall and a retainer which is movably mounted within the anvil head and anvil in order to abut the hub and tension the resilient fingers radially inwardly. In another embodiment, the anvil head has an annular recess while each finger is separately mounted .~
1 3 `1 7 1 ~ () within the recess. In this embodiment, means for biasing the fingers includes an axially movable retainer ring concentrically within the fingers and mounted on the anvil head and a circular spring encompassing the fingers within the recess of the anvil head in order to bias the ~ingers onto the retainer ring. In addition, each finger is provided with a recess so as to receive the retainer ring after axial movement of the ring in order to permit inward radial movement of the fingers under the action of the circular spring.
A surgical fastener to be mounted upon said anvil assembly may suitably be comprised of: 1) an annular stapling part having a plurality of axially extending circumferentially spaced prongs each of which has a sharp tip for piercing tissue; 2) an annular retaining part with an annular gap for receiving the prongs of the stapling part; and 3) catch means for holding the prongs in the retaining part in order to clamp pierced tissue therebetween. For example, the catch means may include a radially extending barb on at least one of the prongs and a retaining ring on the retaininy part for butting of each barb thereon.
The retaining ring may also include a cylindrical guide wall about the retaining ring in order to define an annular gap to receive the prongs of the stapling part.
Suitable means are also provided for securing the guide wall to the retaining ring.
The invention also provides a surgical stapling apparatus which is comprised of a central shaft, an anvil assembly mounted on the distal end of the shaft and a surgical fastener holding assembly mounted on the shaft for relative movement with the anvil assembly to releaseably retain two ends of tubular tissue therebetween. In this regard, the anvil assembly includes a plurality of radiating fingers extending angularly outwardly of the shaft, an annular cutting block removably mounted on the - 13171~0 fingers and means for biasing the fingers radially inwardly of the block. The holding assembly încludes an annular knife blade coaxially opposite the cutting block for severing tissue disposed therebetween. This blade also has an edge for penetrating and holding the block thereon whereby upon movement of the holding assembly and the anvil assembly from each other, the block is removed ~rom -the fingers to permi~ the fingers to move radially inwardly for passage through a stapled seam between the two ends of the tissue.
The aforesaid stapling apparatus permits the user to staple the tubular ends of a pair of vessels together by following the steps of clamping the tubular ends of the vessels between an anvil assembly and a surgical fastener holding assembly, driving an annular stapling part through the clamped ends of the tissue into an annular retaining part removably supported on the anvil assembly and severing the clamped ends on a circular cutting line disposed radially within the stapling part. Subsequently, the anvil assembly may be moved away from the stapled ends of the tissue to withdraw the anvil assembly from the annular retaining part, thereafter, collapsing the anvil assembly radially inwardly of the retaining part and the cutting line and then withdrawing the stapling , ~
1 3 1 7 ~ ~0 1 apparatus from the stapled-to~ether vessels~
These and other ob~ects and advantages of the 3 invention will become more apparent fxom the following 1~ detailed description taken in conjunction with the accompanving drawings wherein:
6 Fig. 1 illustrates a perspective view of a surgical 7 stapling appara~us constructed in accorflance with the invention ~3 in place within an intes~ine;
g Fig. 2 illustrates a ~erspective view of the distal 1~ end of the stapling apparatus prior to fastening;
11 Fig. 3 illustrates a view similar to Fig. 2 of the 12 distal end of the stanling apparatus during a staplinq 13 operation;
14 Fig. 4 illustrates a part sectional side view of the ~pparatus of Fig~ l;
lZ Fig. 5 illustrates an exploded view of the distal ~7 end of the apparatus of Fig. l;
18 Pig. 6 illustrates an exploded view of a surgical 19 ~astener, anvil assembly and holding assembly in accoxdance with the invention;
21 Fig. 7 illustrates a front view of an annular retaining 22 part in accordance with the invention;
23 Fig. 8 illustrates a front view of an annular stapling 24 part in accordance with the invention;
Fig. 9 illustrates an exploded view of the retaining 26 part and stapling part in accordance with the invention:
27 Fig. lG illustrates side views of the retaining part 28 and stapling part of Fig. 9;
29 Fig. 11 illustrates a view of the distal end of the 3 surgical stapling apparatus prior to stapling;
_5 _ 1 ~ 1 7 1 ~0 ~ Fig. 12 illustrates a cross sectional view of the 2 stapling components of the apparatus during an initial phase ~f stapling;
Fig. 13 illus~ra-tes a view similar to FigO 12 of the ~, stapling components after stapling;
Fig. 14 illustrates a view similar to Figs~ 12 and 13 7 during withdrawal of the anvil assemblv;
rO Fig. 15 illustrates an exploded view of the distal end g of a surgical apparatus employing a modlfied anvil assembly in accordance with the assembly~
1~ Fig. 16 illustrates a cross sectional view of the 12 distal end of the surgical apparatu- employing the anvil 13 assembly of Fig. 15 during a stapling operation;
14 Fig. 17 illustrates a view similar to Fig. 16 of the apparatus after stapling; and 1~ Fig. 18 illustrates a view similar to Figs. 16 and 17 17 after collapsing of the anvil assembly in accordance with the 18 invention.
19 Referring to Figs. 1 and 4, the surgical stapling ~o apparatus 1 is used, for example for ~he stapling of two ~1 ends 2, 4 of an in-testine wherein a section of the intestine ~ has been surgically removed between cut ends 6, 8. As 23 indicated in Fig. 1, the cut ends 6, 8 of the intestine are 24 generally tied with suture material 10, 12 with conventional purse-string suturing being used.
26 The staplin~ apparatus 1 includes a shaft 14 and a 27 hand screw 16 which is articulated to the shaft 14 in order to 28 move the shaft 14. As indicated in Fig. 4, the apparatus 1 29 includes an anvil assembly 17 which is mounted on a distal end of the shaft 14 and includes an anvil 18 which faces a surgical 1 ~1 7 1 ~0 1 fastener holding assembly 20 which is also mounted on the 2 shaft 14 fo~ ~elative movement with the anvil assemblv 17 to 3 maintain the two ends of the intestine areas 22, 2~ therebetween.
4 Referring to Fig. 4, the shaft 14 is provided with a 5 sc~ewthread 30 at the proximal end which mates in an internally 6 threaded sleeve extensio~ 32 of the hand screw 16~ The sleeve 7 extension 32 is secured to the hand screw 16 so that both turn 8 together and thus the rotation of the hand screw 16 causes 9 longitudinal movement of the shaft 14. By tightening the hand screw 16, the anvil assembly can be ~oved towards the holding 11 assembly 20 so that the tissue can be clam~ed therebetween 12 with proper spacing between the anvil assembly 17 and the ~3 holding assembly 20. Calibration means (not shown) may be 14 provided to ensure proper spacing, for example as described in ~.S. Vatent 4,473,077 1~ The apparatus 1 is also provided with a handle 36 and 17 a trigger 28 which is pivotally mounted on a pivot pin 40 secured 18 in the housing of the apparatus 1. A safetv latch 27 is also 19 pivotally mounted on a pivot pin 34 on the handle 36 in order to prevent pivoting of the trigger 28. In addition, the 21 trigger 28 is articulated in known manner, for example via a ~2 pusher 42 to a slider 44 disDosed about -the shaft 14. This 23 slider 44 abuts a compression sprin~ 46 in order to applv a 24 biasing force on a tube 48 concentric of the sleeve 14 in order to move the tube 48 distally upon actuation o the trigger 28.
2b The tube 48, in turn, cooperates with an actuator 50 in order to ~7 perform a stapling operation.
28 Referring to Figs. 4 and 5, the shaft 14 has a threaded 29 distal end on which the anvil assembly 17 is mounted in threaded manner. In addition, a bayonet mount 104 is secured, in known 1 31 7 ~ ~0 l manner on the tube 48. In this regard, ~he holding assembly 20 2 includes a sleeve at the proximal end which carries a pin or 3 fitting into the ba~onet connection of the mount 104.
4 As indicated in Fi~. 4, a sheath 102 is provided over the central part of the instrument and has a tubular portion 53 Fitting within the bayonet mount 104 (see F.ig. 12).
v~ Referring to Figs. 2 ~nd 3, when the ~pparatus is initially put in place, the cut ends 6, 8 of the body tissue are 9 drawn in about the shaft 14 with the anvil assembly l~ .in a spaced condition relative to the holding assembly 20.
ll During stapling, the anvil assembly 17 is drawn against the 12 holding assembly 20 so as to clamp the ends of the tissue between 13 the anvil assembly 17 and the holding assembly 20 (see Fig. 3).
l4 Referring to Figs. 6 and 12, the actuator means includes an actuator 50 which is abutted against the distal end of the tube 16 48 and is disposed within the holding assemblv 20. In this 17 respect, the holding assembly is ~rovided with a pad 51 which l8 ~rictionally retains the actuator 5~ in place until the actuator ~g .50 is driven clear of the pad 51 by the tube 48. The actuator 50 carries an annular push ring 54 as well as an annular 21 blade or scalpel 52 which is retained between the actuator 50 22 and push ring 54. In addition, a plastic spacer ring 56 is 23 concentrically disposed between the push ring 54 and the 24 annular scalpel 52. As indicated in Fig. 6, the push ring 54 is provided with a plurality of circumferentially disposed 26 slots at the distal end.
27 An annular stapling part 58 is mounted about the 28 spacer ring 56 and against the push ring 54 (see Fig. 12) and 29 has a plurality of axially extending circumferentially spaced prongs 60.
1 3 I 7 1 8~) 1 The anvil 18 is made of resilient material and has a 2 plurality of radiating fingers 80 extending angularly outwardly 3 from a central hub 82 concentrically disposed about the longitudinal axis of the shaft 14. In this regard, the anvil 18 ~ is made of one piece with several fingers 80. As indicated o in Fig. 6, the anvil 18 has a somewhat frustum-like shape with 7 the cylindrical hub 82 at the distal end. In addition, each 8 finger 80 tapers in bo~h thickness and width from the free end to g the hub 82. In addition, the free end of each finger 80 has an extension 78 which forms a basal ridge as well as an annular 11 reaction surface 77 within the extension 78.
1~ An annular cutting block 76 is removably mounted within 13 the outer ends of the fingers 80. That is, the cutting block 14 76 abuts against the reaction surfaces 77 of the fingers 80 within the extension 78. As indicated in Fig. 12, the cutting lS block 76 is aligned with the annular scalpel 52 and is made of a 17 material so as to be penetrated by the cutting edge of the 18 scalpel 52. The cutting block 76 is also shaped so as to be 19 fitted into and about the extensions 78 in a slide fit manner.
An annular retaining part 62 is also mounted at the 21 free ends of the finyers 80 of the anvil 18. As indicated, 22 the retaining part 62 includes an inner cylindrical guide wall 64 23 and an outer retaining ring 66 which are concentrically disposed 24 relative to each other to define an annular ga~ for receiving the prongs 60. Suitable means in the form of posts 68 (Fig. 8) 26 are provided to secure the retainin~ rings 66 to the cylindrical~
27 wall 64. An annular flange 67 is also provided between the 28 post 68 and the guide wall 64 ~Fig. 7).
29 Referring to Figs. 9 and 10, wherein like reference characters indicate like parts as above, each prong 60 of the ~ g _ 13171~0 1 s~apling part 58 has a sharp tip for piercing tissue while the 2 retaining par~ 62 is positioned to receive the pr~ngs 60. Catch 3 means are also provided for holding the prongs 60 in the ~ retaining part 62 in order i~o clamp the pierced ti,ssue there-between. As illustrated, ~he catch means includes a radially 6 extending barb 69 on each prong 60 with a proximally facing 7 surface 70 which can be engaged against the retaining ring 66 ~ of the retaininy part 62. As indicated, each barb 69 extends 9 radially outwardly of a prong 60 so that the proximally facing surface 70 can be engaged against the retaining ring 66.
11 The annular stapling part 58 and annular retaining part 12 62 form a surgical fastening 98 which is of relatively simple 13 construction. Both parts 58 62 can be rotated relative to the 14 other and need n~t be precisely registered in order to provide for stapling.
16 When the two parts 58, 62 are brought together, the 17 prongs 60 pierce the tissue and then enter into the gap between 18 the guide walls 64 and retaining ring 56. At this time, the 19 guide walls 64 and rings 66 temporarily deform due to the wedging action of the barbs 69. ~fter the barbs 69 clear the 21 retaining ring 66, the ring 66 and wall 62 snap back into their 22 normal relationship in which the surfaces 70 of the barbs 69 23 engage against the retaining ring 66 thus securing the parts 24 58, 62 together while also clamping the two ends of tissue together. Of note, the flange 67 protects uninvolved tissue 26 from ~he sharp ends of the prongs 60 ~see Fig. 13).
27 j Referrins to Figs. 6 and 12, the anvil assembly 17 28 also includes an anvil head 81 having an internal conical wall 29 which receives the anvil with the fingers 80 abutting against the wall. In addition, the anvil head 81 has a central shaft 86 _ 10 --1 3 1 7 1 ~0 1 about which the hub ~2 is mounted via an ~xial opening 84. The ~2 shaft 86 also has an external screw thread 88 on which a huh 3 retainer 92 is ~eaded via internal scrPw threads 94. The 4 hub retainer 92 is thus able to free~heel in relation to the anvil head 81, that is, the hub retainer 92 can be threaded into abuttment with the hub 82 with a greater or lesser degree o~
7 force. ln this way, the anvil head 81 and retainer 92 cooperate 8 to form a means for biasin~ the fingers 80 o~ the anvil 18 9 radially inwardly of the cuttin~ block 76 to permit movement of the fingers 80 radially inwardly in response to removal of the 11 cutting block 76 from the fingers 80. As indicated in Fig. 12, 12 cuttin~ block 76 holds the fingers ~0 in a tensioned state. In 13 addition, the fingers 80 are suitably shaped so as to hold the 14 retaining part 62 in a snap fit relation (see Fig. 12). When ~5 the cutting block 76 and retaining part 62 are in place, 16 dimensional stability is imparted to the resilient fingers 80.
17 As indicated in Fi~. 12, while the anvil 18 is made of 18 a plastic, the anvil head 81 and retainer ring 92 are made of a 19 metal, such as aluminum. Further, the anvil head 81 is provided with a threaded bore so as to be threaded onto the distal end of 21 the central shaft 14.
22 Referrlng to Fig. 11, in use, in order to staple the 23 tubular ends of the tissue together, the stapling apparatus 24 is inserted in a conventional manner. Thereafter, the ends of the tissue 2, 4 are pulled to~ether as indicated in Fig. 11 26 about the central shaft 14 so as to dispose two areas 22, 27 24 between the anvil assembly 17 and the fastener holdin~
28 assembly 20. Thereafter, the shaft 14 is moved proximally via 29 the hand screw 16 so as to move the anvil assembly 17 into a clamped position with the holding assembly 20. In this position, 13171~0 1 the areas 22, 24 of the tissue 2, ~ are clamped between 2 the anvil 18 and the holding assembly 20. Next, triggering ;~ oE the in~trument via the trigger 28 (see Fig. 1) causes the tube l~ 48 to be moved distally. This in turn moves the ac~uator 50 distally. As a result, the annular scalpel 52 severs the S clamped ends of the tissue on a circular cutting line 99 7 while penetrating intc the cutting block 76O At the same r~ time, the push ring 54 p~lshes the prong 60 oE the stapling par~
9 58 through the clamped ends of the tissue into the annular retaining part 62 with the barb 69 engaqing behind the retaining 11 ring 66 as indicated in Fig. 13.
12 Next, the anvil assembly 17 is moved away from the 13 holding assembly 20 by turning of the handscrew 16 [see Fig. 1~.
14 During this time, the annular cutting block 76 which has been imbedded by the annular scalpel 52 remains in place on the 16 scalpel 52 as indicated in Fig. 14. At the same time, the 17 annular stapling part 58 remains engaged in the retaining 18 part 62 so as to staple the tissue ends together in a seam as 19 indicated in Fig. 14. In addition, since the cutting block 76 has been withdrawn from the fingers ~0 of the anvil 18, 21 these fingers 80 collapse radially inwardly as also indicated 22 in Fig. 14. The degree of collapse of the fingers ~0 is such 23 that the fingers 80 fall inside of the cutting line 99 defined 24 by the seamed tissue. Thus, the staPling apparatus 1 may then be removed from within the stapled-together ends. Of note, 26 when the trigger 3B (see Fig. A) is released, the compression 27 spring 46 biases the slider 44 to return to a proximal position 28 which, in turn, pulls back the shaft 48 into a position as 29 shown in Fig. 14. The actuator 50 remains within the holding 3 assembly 20, for example, as indicated by means of a detent 13171~0 1 and a holding ring of the holding assembly 20.
2 The stapling ~art 58 and retaining part 62 ~ can be made of any suitable mat~rials, such as nylon, 4 polycarbonate or other material. If a non-permanent fastener 5 is to be used, these parts may be made of a tissue ~ absorbable polymer.
7 Referring to Figs. 15 and 18, wherein like reference 8 characters indicate like points as above, the stapling apparatus 9 may be provided with a modified anvil 118 for the stapling of the surgical fastener parts 58, 62. In this respect, the 11 anvil assembly has an anvil head 188 which is threaded onto a 12 threaded distal end of the shaft 14 and which includes an 13 elongated sleeve 182 with an annular recess defined by the 14 sleeve 182 and the outer peripherv of the anvil head 188.
As indicated in Fig. 16, the sleeve 182 may be abutted against 16 a shouldered portion of the shaft 14. In addition, a plurality 17 of individual fin~ers 180 are circumferentially disposed with 18 one end 181 within the recess of the anvil head 188. As shown in 19 Fig. 16, the distal end 181 of each finger 180 rests on a sloped surface on the sleeve 182 while a proximal end rests by way ~1 of plane suraces 184 on the outer surface of an axially movable 22 retainer ring 185 which is mounted on the sleeve 182. In 23 addition, a split circular spring 183 encompasses the fingers 24 180 and is disposed within a groove 184A in each finger so as to bias the fingers 180 onto the retainer ring 185. Each 26 finger 180 is also provided internally with an intermediately 27 disposed recess 187 whichis spacedaxially from the ring 185 and 28 which is sized to receive the ring 185 upon axial movement of 29 the ring 185 thereinto to permit inward radial movement of the finger 1~0 under the bias of the sPring 183.
~3l7lao 1 The fingers 180 may be made of plastic, as indicated, or may be made of anodized aluminum or other metals.
3 The fingers 180 of the anvil 118 are mounted within the anvil head 188 so as to be biased outwardly by the retaining ~ ring 185 against the interior surface of the anvil head 188.
6 The spring 183 which is in the form o a split ring serves to 7 bias the fingers 180 against the retaining ring 185. In this 8 respect, the fingers 180 tend to pivot about the ends 181 g (see Fig. 17) within the anvil head 188.
As described above, the anvil 118 carries an annular 11 cutting block 176 and an annular retaining part 62 of the 12 fastener at the proximal end.
13 Referring to Fig. 16, the actuator of 150 in addition 14 to carrying an annular scalpel 152 and the fastener holding ~5 assembly 20 also abuts a pusher 186 in the form of a sleeve at 16 a distal end. As indicated, the sleeve 186 has a recessed 17 distal end to slide over the sleeve 182 of the anvil head 188 in 18 order to abut against the retainer ring 185 when the actuator 19 lS0 is moved distally.
Referring to Fig. 16, 17 and 18, the operation of the 21 stapling apparatus is similar to that as described above. In 22 this respect, after the anvil assemblY and anvil head 118 have 23 been drawn towards the fastener holding assembly 20 to clamp the 24 tissue areas 22, 24 therebetween, the triyger (see Fig. 1) is 25 actuated to push the tube 48 and actuator 150 distally. At this 26 time, the pusher 186 slides over the sleeve 18~ of the anvil 27 head 188 while th~ scalpel 152 severs the tissue and penetrates 28 into the cutting bl~ck 176 an~ ~he prongs 60 of the stapliny 29 part 58 pierce the tissue and become retained in the retaining part 62 as indicated in Fig. 17. The motion of the actuator 150 ~3171~0 is such that the pusher 1~6 moves the retainer ring 185 into alignment with the recess 187 of the fingers 180.
Thus, the fingers 180 move under the bias of the spring 183 radially inwardly by pivoting about the ends 1810 Thereafter, the apparatus is manipulated as described above to displace the anvil 118 from the holding assembly 120 in order to insure displacement of the anvil 118 from the cutting block 176. At this time, the apparatus can be withdrawn from within the seamed tissue as indicated in Fiy. 18. In this respect, the cutting block remains on the scalpel 152 while the fingers 180 are collapsed about the retaining ring 185. At the same time, the sleeve 186 has been moved proximally a slight distance away from the retaining ring 185. In this condition, the outside diameter of the fingers 180 has been reduced so as to pass through the stapled-together tissues.
Of note, the anvil head 188 is sized to be smaller than the fastener 98 and the sleeve 182 is contoured so that the anvil fingers 180 are retained in a snap fit relationship.
The stapling apparatus of the present invention may employ a surgical fastener of two-part construction which can be readily manipulated and oriented in place for stapling of body tissue in an anastomosis procedure.
Because the fastener paxts are annular with the prongs of one part fitting into an annular groove of the other part, precise registration of the prongs relative to the annular gap is not required.
Furthermore, the invention provides an anvil assembly of relatively simple construction for holding fastener parts in place for stapling purposes while also permitting collapse of the anvil assembly for withdrawal after use. In this respect, the anvil assembly is reduced in outer contour so as to avoid any injury to the seam which has been formed by the surgical fastener.
\: ' 13171~3() The invention also provides a surgical stapling apparatus which is relatively simple to use. Further, the apparatus can be readily actuated in a single motion to effect stapling and thereafter, with little effort, be withdrawn from a vessel.
The stapling apparatus of the present invention may be used to effect the fastening together the ends of two tubular body organs in a relative minimum of time and with relatively minimal effort with respect to previously known techniques.
2b The tube 48, in turn, cooperates with an actuator 50 in order to ~7 perform a stapling operation.
28 Referring to Figs. 4 and 5, the shaft 14 has a threaded 29 distal end on which the anvil assembly 17 is mounted in threaded manner. In addition, a bayonet mount 104 is secured, in known 1 31 7 ~ ~0 l manner on the tube 48. In this regard, ~he holding assembly 20 2 includes a sleeve at the proximal end which carries a pin or 3 fitting into the ba~onet connection of the mount 104.
4 As indicated in Fi~. 4, a sheath 102 is provided over the central part of the instrument and has a tubular portion 53 Fitting within the bayonet mount 104 (see F.ig. 12).
v~ Referring to Figs. 2 ~nd 3, when the ~pparatus is initially put in place, the cut ends 6, 8 of the body tissue are 9 drawn in about the shaft 14 with the anvil assembly l~ .in a spaced condition relative to the holding assembly 20.
ll During stapling, the anvil assembly 17 is drawn against the 12 holding assembly 20 so as to clamp the ends of the tissue between 13 the anvil assembly 17 and the holding assembly 20 (see Fig. 3).
l4 Referring to Figs. 6 and 12, the actuator means includes an actuator 50 which is abutted against the distal end of the tube 16 48 and is disposed within the holding assemblv 20. In this 17 respect, the holding assembly is ~rovided with a pad 51 which l8 ~rictionally retains the actuator 5~ in place until the actuator ~g .50 is driven clear of the pad 51 by the tube 48. The actuator 50 carries an annular push ring 54 as well as an annular 21 blade or scalpel 52 which is retained between the actuator 50 22 and push ring 54. In addition, a plastic spacer ring 56 is 23 concentrically disposed between the push ring 54 and the 24 annular scalpel 52. As indicated in Fig. 6, the push ring 54 is provided with a plurality of circumferentially disposed 26 slots at the distal end.
27 An annular stapling part 58 is mounted about the 28 spacer ring 56 and against the push ring 54 (see Fig. 12) and 29 has a plurality of axially extending circumferentially spaced prongs 60.
1 3 I 7 1 8~) 1 The anvil 18 is made of resilient material and has a 2 plurality of radiating fingers 80 extending angularly outwardly 3 from a central hub 82 concentrically disposed about the longitudinal axis of the shaft 14. In this regard, the anvil 18 ~ is made of one piece with several fingers 80. As indicated o in Fig. 6, the anvil 18 has a somewhat frustum-like shape with 7 the cylindrical hub 82 at the distal end. In addition, each 8 finger 80 tapers in bo~h thickness and width from the free end to g the hub 82. In addition, the free end of each finger 80 has an extension 78 which forms a basal ridge as well as an annular 11 reaction surface 77 within the extension 78.
1~ An annular cutting block 76 is removably mounted within 13 the outer ends of the fingers 80. That is, the cutting block 14 76 abuts against the reaction surfaces 77 of the fingers 80 within the extension 78. As indicated in Fig. 12, the cutting lS block 76 is aligned with the annular scalpel 52 and is made of a 17 material so as to be penetrated by the cutting edge of the 18 scalpel 52. The cutting block 76 is also shaped so as to be 19 fitted into and about the extensions 78 in a slide fit manner.
An annular retaining part 62 is also mounted at the 21 free ends of the finyers 80 of the anvil 18. As indicated, 22 the retaining part 62 includes an inner cylindrical guide wall 64 23 and an outer retaining ring 66 which are concentrically disposed 24 relative to each other to define an annular ga~ for receiving the prongs 60. Suitable means in the form of posts 68 (Fig. 8) 26 are provided to secure the retainin~ rings 66 to the cylindrical~
27 wall 64. An annular flange 67 is also provided between the 28 post 68 and the guide wall 64 ~Fig. 7).
29 Referring to Figs. 9 and 10, wherein like reference characters indicate like parts as above, each prong 60 of the ~ g _ 13171~0 1 s~apling part 58 has a sharp tip for piercing tissue while the 2 retaining par~ 62 is positioned to receive the pr~ngs 60. Catch 3 means are also provided for holding the prongs 60 in the ~ retaining part 62 in order i~o clamp the pierced ti,ssue there-between. As illustrated, ~he catch means includes a radially 6 extending barb 69 on each prong 60 with a proximally facing 7 surface 70 which can be engaged against the retaining ring 66 ~ of the retaininy part 62. As indicated, each barb 69 extends 9 radially outwardly of a prong 60 so that the proximally facing surface 70 can be engaged against the retaining ring 66.
11 The annular stapling part 58 and annular retaining part 12 62 form a surgical fastening 98 which is of relatively simple 13 construction. Both parts 58 62 can be rotated relative to the 14 other and need n~t be precisely registered in order to provide for stapling.
16 When the two parts 58, 62 are brought together, the 17 prongs 60 pierce the tissue and then enter into the gap between 18 the guide walls 64 and retaining ring 56. At this time, the 19 guide walls 64 and rings 66 temporarily deform due to the wedging action of the barbs 69. ~fter the barbs 69 clear the 21 retaining ring 66, the ring 66 and wall 62 snap back into their 22 normal relationship in which the surfaces 70 of the barbs 69 23 engage against the retaining ring 66 thus securing the parts 24 58, 62 together while also clamping the two ends of tissue together. Of note, the flange 67 protects uninvolved tissue 26 from ~he sharp ends of the prongs 60 ~see Fig. 13).
27 j Referrins to Figs. 6 and 12, the anvil assembly 17 28 also includes an anvil head 81 having an internal conical wall 29 which receives the anvil with the fingers 80 abutting against the wall. In addition, the anvil head 81 has a central shaft 86 _ 10 --1 3 1 7 1 ~0 1 about which the hub ~2 is mounted via an ~xial opening 84. The ~2 shaft 86 also has an external screw thread 88 on which a huh 3 retainer 92 is ~eaded via internal scrPw threads 94. The 4 hub retainer 92 is thus able to free~heel in relation to the anvil head 81, that is, the hub retainer 92 can be threaded into abuttment with the hub 82 with a greater or lesser degree o~
7 force. ln this way, the anvil head 81 and retainer 92 cooperate 8 to form a means for biasin~ the fingers 80 o~ the anvil 18 9 radially inwardly of the cuttin~ block 76 to permit movement of the fingers 80 radially inwardly in response to removal of the 11 cutting block 76 from the fingers 80. As indicated in Fig. 12, 12 cuttin~ block 76 holds the fingers ~0 in a tensioned state. In 13 addition, the fingers 80 are suitably shaped so as to hold the 14 retaining part 62 in a snap fit relation (see Fig. 12). When ~5 the cutting block 76 and retaining part 62 are in place, 16 dimensional stability is imparted to the resilient fingers 80.
17 As indicated in Fi~. 12, while the anvil 18 is made of 18 a plastic, the anvil head 81 and retainer ring 92 are made of a 19 metal, such as aluminum. Further, the anvil head 81 is provided with a threaded bore so as to be threaded onto the distal end of 21 the central shaft 14.
22 Referrlng to Fig. 11, in use, in order to staple the 23 tubular ends of the tissue together, the stapling apparatus 24 is inserted in a conventional manner. Thereafter, the ends of the tissue 2, 4 are pulled to~ether as indicated in Fig. 11 26 about the central shaft 14 so as to dispose two areas 22, 27 24 between the anvil assembly 17 and the fastener holdin~
28 assembly 20. Thereafter, the shaft 14 is moved proximally via 29 the hand screw 16 so as to move the anvil assembly 17 into a clamped position with the holding assembly 20. In this position, 13171~0 1 the areas 22, 24 of the tissue 2, ~ are clamped between 2 the anvil 18 and the holding assembly 20. Next, triggering ;~ oE the in~trument via the trigger 28 (see Fig. 1) causes the tube l~ 48 to be moved distally. This in turn moves the ac~uator 50 distally. As a result, the annular scalpel 52 severs the S clamped ends of the tissue on a circular cutting line 99 7 while penetrating intc the cutting block 76O At the same r~ time, the push ring 54 p~lshes the prong 60 oE the stapling par~
9 58 through the clamped ends of the tissue into the annular retaining part 62 with the barb 69 engaqing behind the retaining 11 ring 66 as indicated in Fig. 13.
12 Next, the anvil assembly 17 is moved away from the 13 holding assembly 20 by turning of the handscrew 16 [see Fig. 1~.
14 During this time, the annular cutting block 76 which has been imbedded by the annular scalpel 52 remains in place on the 16 scalpel 52 as indicated in Fig. 14. At the same time, the 17 annular stapling part 58 remains engaged in the retaining 18 part 62 so as to staple the tissue ends together in a seam as 19 indicated in Fig. 14. In addition, since the cutting block 76 has been withdrawn from the fingers ~0 of the anvil 18, 21 these fingers 80 collapse radially inwardly as also indicated 22 in Fig. 14. The degree of collapse of the fingers ~0 is such 23 that the fingers 80 fall inside of the cutting line 99 defined 24 by the seamed tissue. Thus, the staPling apparatus 1 may then be removed from within the stapled-together ends. Of note, 26 when the trigger 3B (see Fig. A) is released, the compression 27 spring 46 biases the slider 44 to return to a proximal position 28 which, in turn, pulls back the shaft 48 into a position as 29 shown in Fig. 14. The actuator 50 remains within the holding 3 assembly 20, for example, as indicated by means of a detent 13171~0 1 and a holding ring of the holding assembly 20.
2 The stapling ~art 58 and retaining part 62 ~ can be made of any suitable mat~rials, such as nylon, 4 polycarbonate or other material. If a non-permanent fastener 5 is to be used, these parts may be made of a tissue ~ absorbable polymer.
7 Referring to Figs. 15 and 18, wherein like reference 8 characters indicate like points as above, the stapling apparatus 9 may be provided with a modified anvil 118 for the stapling of the surgical fastener parts 58, 62. In this respect, the 11 anvil assembly has an anvil head 188 which is threaded onto a 12 threaded distal end of the shaft 14 and which includes an 13 elongated sleeve 182 with an annular recess defined by the 14 sleeve 182 and the outer peripherv of the anvil head 188.
As indicated in Fig. 16, the sleeve 182 may be abutted against 16 a shouldered portion of the shaft 14. In addition, a plurality 17 of individual fin~ers 180 are circumferentially disposed with 18 one end 181 within the recess of the anvil head 188. As shown in 19 Fig. 16, the distal end 181 of each finger 180 rests on a sloped surface on the sleeve 182 while a proximal end rests by way ~1 of plane suraces 184 on the outer surface of an axially movable 22 retainer ring 185 which is mounted on the sleeve 182. In 23 addition, a split circular spring 183 encompasses the fingers 24 180 and is disposed within a groove 184A in each finger so as to bias the fingers 180 onto the retainer ring 185. Each 26 finger 180 is also provided internally with an intermediately 27 disposed recess 187 whichis spacedaxially from the ring 185 and 28 which is sized to receive the ring 185 upon axial movement of 29 the ring 185 thereinto to permit inward radial movement of the finger 1~0 under the bias of the sPring 183.
~3l7lao 1 The fingers 180 may be made of plastic, as indicated, or may be made of anodized aluminum or other metals.
3 The fingers 180 of the anvil 118 are mounted within the anvil head 188 so as to be biased outwardly by the retaining ~ ring 185 against the interior surface of the anvil head 188.
6 The spring 183 which is in the form o a split ring serves to 7 bias the fingers 180 against the retaining ring 185. In this 8 respect, the fingers 180 tend to pivot about the ends 181 g (see Fig. 17) within the anvil head 188.
As described above, the anvil 118 carries an annular 11 cutting block 176 and an annular retaining part 62 of the 12 fastener at the proximal end.
13 Referring to Fig. 16, the actuator of 150 in addition 14 to carrying an annular scalpel 152 and the fastener holding ~5 assembly 20 also abuts a pusher 186 in the form of a sleeve at 16 a distal end. As indicated, the sleeve 186 has a recessed 17 distal end to slide over the sleeve 182 of the anvil head 188 in 18 order to abut against the retainer ring 185 when the actuator 19 lS0 is moved distally.
Referring to Fig. 16, 17 and 18, the operation of the 21 stapling apparatus is similar to that as described above. In 22 this respect, after the anvil assemblY and anvil head 118 have 23 been drawn towards the fastener holding assembly 20 to clamp the 24 tissue areas 22, 24 therebetween, the triyger (see Fig. 1) is 25 actuated to push the tube 48 and actuator 150 distally. At this 26 time, the pusher 186 slides over the sleeve 18~ of the anvil 27 head 188 while th~ scalpel 152 severs the tissue and penetrates 28 into the cutting bl~ck 176 an~ ~he prongs 60 of the stapliny 29 part 58 pierce the tissue and become retained in the retaining part 62 as indicated in Fig. 17. The motion of the actuator 150 ~3171~0 is such that the pusher 1~6 moves the retainer ring 185 into alignment with the recess 187 of the fingers 180.
Thus, the fingers 180 move under the bias of the spring 183 radially inwardly by pivoting about the ends 1810 Thereafter, the apparatus is manipulated as described above to displace the anvil 118 from the holding assembly 120 in order to insure displacement of the anvil 118 from the cutting block 176. At this time, the apparatus can be withdrawn from within the seamed tissue as indicated in Fiy. 18. In this respect, the cutting block remains on the scalpel 152 while the fingers 180 are collapsed about the retaining ring 185. At the same time, the sleeve 186 has been moved proximally a slight distance away from the retaining ring 185. In this condition, the outside diameter of the fingers 180 has been reduced so as to pass through the stapled-together tissues.
Of note, the anvil head 188 is sized to be smaller than the fastener 98 and the sleeve 182 is contoured so that the anvil fingers 180 are retained in a snap fit relationship.
The stapling apparatus of the present invention may employ a surgical fastener of two-part construction which can be readily manipulated and oriented in place for stapling of body tissue in an anastomosis procedure.
Because the fastener paxts are annular with the prongs of one part fitting into an annular groove of the other part, precise registration of the prongs relative to the annular gap is not required.
Furthermore, the invention provides an anvil assembly of relatively simple construction for holding fastener parts in place for stapling purposes while also permitting collapse of the anvil assembly for withdrawal after use. In this respect, the anvil assembly is reduced in outer contour so as to avoid any injury to the seam which has been formed by the surgical fastener.
\: ' 13171~3() The invention also provides a surgical stapling apparatus which is relatively simple to use. Further, the apparatus can be readily actuated in a single motion to effect stapling and thereafter, with little effort, be withdrawn from a vessel.
The stapling apparatus of the present invention may be used to effect the fastening together the ends of two tubular body organs in a relative minimum of time and with relatively minimal effort with respect to previously known techniques.
Claims (14)
1. A surgical stapling apparatus comprising:
a central shaft;
an anvil assembly mounted on a distal end of said shaft, said anvil assembly including a plurality of radiating fingers extending angularly outwardly of said shaft, an annual cutting block removably mounted on said fingers and means for biasing said fingers radially inwardly of said block; and a surgical fastener holding assembly mounted on said shaft for relative movement with said anvil assembly to releaseably retain two ends of tubular tissue therebetween, said holding assembly including an annular knife blade coaxially opposite said cutting block for severing tissue disposed therebetween, said blade having an edge for penetrating and holding said block thereon whereby upon movement of said holding assembly and said anvil assembly from each other, said block is removed from said fingers to permit said fingers to move radially inwardly for passage through a stapled seam between the two ends of the tissue.
a central shaft;
an anvil assembly mounted on a distal end of said shaft, said anvil assembly including a plurality of radiating fingers extending angularly outwardly of said shaft, an annual cutting block removably mounted on said fingers and means for biasing said fingers radially inwardly of said block; and a surgical fastener holding assembly mounted on said shaft for relative movement with said anvil assembly to releaseably retain two ends of tubular tissue therebetween, said holding assembly including an annular knife blade coaxially opposite said cutting block for severing tissue disposed therebetween, said blade having an edge for penetrating and holding said block thereon whereby upon movement of said holding assembly and said anvil assembly from each other, said block is removed from said fingers to permit said fingers to move radially inwardly for passage through a stapled seam between the two ends of the tissue.
2. An apparatus as set forth in claim 1, wherein said holding assembly includes a removable annular stapling part having a plurality of coaxial prongs for piercing the tissue and said anvil assembly includes a removable annular retainer part mounted on said fingers about said block for receiving and holding said prongs.
3. An apparatus as set forth in claim 2, wherein said stapling part and said retaining part include catch means for holding said prongs in said retaining part to clamp the pierced tissue therebetween.
4. An apparatus as set forth in claim 1, wherein said anvil assembly further includes a central hub integrally joining said fingers with said fingers being resiliently deformable.
5. An apparatus as set forth in claim 4, wherein said means for biasing said fingers includes an anvil head threaded on said shaft with an internal conical wall abutting said fingers and a retainer movably mounted on said shaft within said fingers in abutment with said hub to tension said fingers radially inward.
6. An apparatus as set forth in claim 4, wherein said anvil assembly includes an anvil head having an annular recess receiving one end of each finger, an axially movable retainer ring concentrically within said fingers and mounted on said anvil head; and a circular spring encompassing said fingers within said recess to bias said fingers onto said retainer ring.
7. An apparatus as set forth in claim 6, wherein said holding assembly includes a tubular pusher about said shaft for abutting and pushing said retainer inwardly of said anvil assembly and wherein each finger has an intermediately disposed recess spaced axially from said ring and sized to receive said ring.
8. An anvil assembly for a surgical fastener comprising:
an anvil having a plurality of radiating fingers extending angularly outwardly of a longitudinal axis;
an annular cutting block removably mounted on said fingers for engagement with an annular knife blade; and means for biasing said fingers radially inwardly of said block to permit movement of said fingers radially inwardly in response to removal of said cutting block from said fingers.
an anvil having a plurality of radiating fingers extending angularly outwardly of a longitudinal axis;
an annular cutting block removably mounted on said fingers for engagement with an annular knife blade; and means for biasing said fingers radially inwardly of said block to permit movement of said fingers radially inwardly in response to removal of said cutting block from said fingers.
9. An anvil assembly as set forth in claim 8, which further includes a central hub wherein each said finger is integral with said hub and is resiliently deformable.
10. An anvil assembly as set forth in claim 9, wherein said means includes an anvil head having an internal conical wall receiving said anvil with said fingers abutting said wall and a retainer movably mounted within said anvil head and said anvil in abutment with said hub to tension said fingers radially inward.
11. An anvil assembly as set forth in claim 10, wherein said anvil head has a threaded bore for reception of a threaded shaft.
12. An anvil assembly as set forth in claim 8, which further comprises an anvil head having an annular recess receiving one end of each finger, an axially movable retainer ring concentrically within said fingers and mounted on said anvil head; and a circular spring encompassing said fingers within said recess to bias said fingers onto said retainer ring.
13. An anvil assembly as set forth in claim 12, wherein each finger has an intermediately disposed recess spaced axially from said ring and sized to receive said ring upon axial movement of said ring thereinto to permit inward radial movement of said finger.
14. An anvil assembly as set forth in claim 12, wherein each finger is made of aluminum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA000616440A CA1324549C (en) | 1986-10-17 | 1992-07-15 | Surgical fastener for a surgical stapling apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/920,581 US4752024A (en) | 1986-10-17 | 1986-10-17 | Surgical fastener and surgical stapling apparatus |
US920,581 | 1986-10-17 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000616440A Division CA1324549C (en) | 1986-10-17 | 1992-07-15 | Surgical fastener for a surgical stapling apparatus |
Publications (1)
Publication Number | Publication Date |
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CA1317180C true CA1317180C (en) | 1993-05-04 |
Family
ID=25443997
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA000548389A Expired - Lifetime CA1317180C (en) | 1986-10-17 | 1987-10-01 | Method and apparatus for applying anastomis device |
Country Status (2)
Country | Link |
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US (1) | US4752024A (en) |
CA (1) | CA1317180C (en) |
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US3494533A (en) * | 1966-10-10 | 1970-02-10 | United States Surgical Corp | Surgical stapler for stitching body organs |
US4304236A (en) * | 1977-05-26 | 1981-12-08 | United States Surgical Corporation | Stapling instrument having an anvil-carrying part of particular geometric shape |
US4603693A (en) * | 1977-05-26 | 1986-08-05 | United States Surgical Corporation | Instrument for circular surgical stapling of hollow body organs and disposable cartridge therefor |
US4198982A (en) * | 1978-03-31 | 1980-04-22 | Memorial Hospital For Cancer And Allied Diseases | Surgical stapling instrument and method |
US4351466A (en) * | 1980-10-16 | 1982-09-28 | United States Surgical Corporation | Disposable instrument for surgical fastening |
US4476863A (en) * | 1981-03-09 | 1984-10-16 | Kanshin Nikolai N | Surgical instrument for establishing circular coloanastomoses |
US4567891A (en) * | 1981-12-31 | 1986-02-04 | Kanshin Nikolai N | Device for establishing compression anastomoses |
SU1114405A1 (en) * | 1982-02-23 | 1984-09-23 | Всесоюзный научно-исследовательский и испытательный институт медицинской техники | Surgical suturing apparatus for placing compression anastomoses on the organs of digestive tract |
US4423730A (en) * | 1982-03-01 | 1984-01-03 | Shelhigh Inc. | Atriotomy button and implantation device |
US4473077A (en) * | 1982-05-28 | 1984-09-25 | United States Surgical Corporation | Surgical stapler apparatus with flexible shaft |
US4488523A (en) * | 1982-09-24 | 1984-12-18 | United States Surgical Corporation | Flexible, hydraulically actuated device for applying surgical fasteners |
US4505414A (en) * | 1983-10-12 | 1985-03-19 | Filipi Charles J | Expandable anvil surgical stapler |
IT1173284B (en) * | 1984-02-16 | 1987-06-18 | Riccardo Rosati | CIRCULAR MECHANICAL STAPLING MACHINE |
IT1196026B (en) * | 1984-02-16 | 1988-11-10 | Carlo Rebuffat | CIRCULAR ANASTOMOSIS PE DEVICE |
-
1986
- 1986-10-17 US US06/920,581 patent/US4752024A/en not_active Expired - Fee Related
-
1987
- 1987-10-01 CA CA000548389A patent/CA1317180C/en not_active Expired - Lifetime
Also Published As
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US4752024A (en) | 1988-06-21 |
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