CA2667723A1 - Surgical portal apparatus with waffle seal - Google Patents
Surgical portal apparatus with waffle seal Download PDFInfo
- Publication number
- CA2667723A1 CA2667723A1 CA002667723A CA2667723A CA2667723A1 CA 2667723 A1 CA2667723 A1 CA 2667723A1 CA 002667723 A CA002667723 A CA 002667723A CA 2667723 A CA2667723 A CA 2667723A CA 2667723 A1 CA2667723 A1 CA 2667723A1
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- CA
- Canada
- Prior art keywords
- portal
- seal
- surgical
- passage
- seal member
- 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.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3498—Valves therefor, e.g. flapper valves, slide valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3462—Trocars; Puncturing needles with means for changing the diameter or the orientation of the entrance port of the cannula, e.g. for use with different-sized instruments, reduction ports, adapter seals
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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
- A61B2017/00831—Material properties
- A61B2017/00862—Material properties elastic or resilient
Abstract
A surgical portal apparatus includes a portal housing, an elongated portal member connected to the portal housing and depending therefrom, and a seal member comprising a resilient material and being mounted to the portal housing. The portal housing and the portal member have an axial bore for reception and passage of a surgical object. The seal member includes leading and trailing faces and has inner portions defining a passage to permit passage of a surgical object. One of the leading and trailing faces defines a plurality of recessed cells formed within interconnected struts. The interconnected struts are relatively flexible to flex upon radial offset manipulation of the object to permit corresponding movement of the passage while substantially maintaining a seal about the surgical object. At least some of the recessed cells define a generally rectangular arrangement. Preferably, the leading end face of the seal member has the recessed cells.
Description
URGICAL PORTAL APPARATUS WITH WAFFLE SEAL
BACKGRO D
1. Technical ield The present disclosure relates to a surgical portal for accessing underlying body tissue to~permit the introduction of surgical objects in conjunction with a medical procedure. Mpre particularly, the present disclosure relates to a surgical portal including a seal defining a gridiron or waffle pattern adapted to flex and facilitate offset manipulation of a surgical object while substantially maintaining a sealing relation therewith.
BACKGRO D
1. Technical ield The present disclosure relates to a surgical portal for accessing underlying body tissue to~permit the introduction of surgical objects in conjunction with a medical procedure. Mpre particularly, the present disclosure relates to a surgical portal including a seal defining a gridiron or waffle pattern adapted to flex and facilitate offset manipulation of a surgical object while substantially maintaining a sealing relation therewith.
2. Discussion pf Related Art Surgical portals are employed in various minimally invasive procedures including lapa>aoscopic or endoscopic procedures. Such portals are inclusive of trocar cannulas, cathdters, or, in the event of a minimally invasive hand assist procedures, hand access devices: Surgical portals typically incorporate a seal mechanism to form a fluid II
tight seal abou~ an instrument or hand passed through the portal. The seal mechanisms, however, often are limited by their ability to sustain a seal when an instrument, particularly, a smaller diam ter instrument, is moved off-axis relative to a central axis of the portal.
Moreover, the eal mechanisms are also limited by their ability to sustain their integrity - --, ~ _ when the sur ical instrument is angulated. Such extreme ranges of motion of smaller diameter sur ical instruments within the portal can create a "cat eye" or crescent shaped gap about the instrument resulting in fluid loss (e.g., insufflation gas loss).
SUIVIlVIARY I~
Accordingly, the present disclosure is directed to a surgical portal apparatus.
The surgical ortal apparatus includes a portal ortal housing, an elongated portal member connected to he portal housing and depending therefrom, and a seal member comprising a resilient material and being mounted to the portal housing. The portal housing and the portal membejr have an axial bore for reception and passage of a surgical object. The seal member inclui'des leading and trailing faces and has inner portions defining a passage to permit passage of a surgical object. One of the leading and trailing faces defines a plurality of recessed cells formed within interconnected struts. The interconnected struts are relatively flexible to flex upon radial offset manipulation of the object to permit correspondiq movement of the passage while substantially maintaining a seal about the surgical object. At least some of the recessed cells define a generally rectangular arrangement. Preferably, the leading end face of the seal member has the recessed cells.
The trailing end face of the seal member may define a seal recess circumscribi4 the passage to facilitate reception and passage of the surgical object through the passage. he seal recess may be generally annular. The seal member may include an annular seal c llar depending from the trailing end face. The annular seal collar includes an internal wa 1 surface which may be tapered to facilitate aligrunent of the surgical object with the pass ge during introduction of the surgical object within the seal member. The trailing end face may include an internal tapered wall circumscribing the passage to facilitate alig ment of the surgical object with the passage during passage through the seal member.
The seal member may define an aperture therethrough functioning as the passage. The,seal member may comprise a gel material. A zero closure seal may be disposed with n the portal housing to substantially close the axial bore in the absence of the surgical object.
Other embodiments are also envisioned.
BRIEF DES~RIPTION OF THE DRAWINGS
Preferred embodiments of the present disclosure will be better appreciated by reference to the drawings wherein:
FIG.1 is a perspective view with parts separated of the surgical portal apparatus in accordance with the principles of the present disclosure illustrating, the seal assembly and the surgical portal assembly;
FIG. 2 is a side cross-sectional view of the seal assembly and the portal housing of the', surgical portal assembly;
FIG. 3 is a perspective view with parts separated of the seal assembly of the surgical portal'i apparatus;
FIGS. 4 and 5 are frontal and rear perspective views of the seal member of the seal assem~ly;
tight seal abou~ an instrument or hand passed through the portal. The seal mechanisms, however, often are limited by their ability to sustain a seal when an instrument, particularly, a smaller diam ter instrument, is moved off-axis relative to a central axis of the portal.
Moreover, the eal mechanisms are also limited by their ability to sustain their integrity - --, ~ _ when the sur ical instrument is angulated. Such extreme ranges of motion of smaller diameter sur ical instruments within the portal can create a "cat eye" or crescent shaped gap about the instrument resulting in fluid loss (e.g., insufflation gas loss).
SUIVIlVIARY I~
Accordingly, the present disclosure is directed to a surgical portal apparatus.
The surgical ortal apparatus includes a portal ortal housing, an elongated portal member connected to he portal housing and depending therefrom, and a seal member comprising a resilient material and being mounted to the portal housing. The portal housing and the portal membejr have an axial bore for reception and passage of a surgical object. The seal member inclui'des leading and trailing faces and has inner portions defining a passage to permit passage of a surgical object. One of the leading and trailing faces defines a plurality of recessed cells formed within interconnected struts. The interconnected struts are relatively flexible to flex upon radial offset manipulation of the object to permit correspondiq movement of the passage while substantially maintaining a seal about the surgical object. At least some of the recessed cells define a generally rectangular arrangement. Preferably, the leading end face of the seal member has the recessed cells.
The trailing end face of the seal member may define a seal recess circumscribi4 the passage to facilitate reception and passage of the surgical object through the passage. he seal recess may be generally annular. The seal member may include an annular seal c llar depending from the trailing end face. The annular seal collar includes an internal wa 1 surface which may be tapered to facilitate aligrunent of the surgical object with the pass ge during introduction of the surgical object within the seal member. The trailing end face may include an internal tapered wall circumscribing the passage to facilitate alig ment of the surgical object with the passage during passage through the seal member.
The seal member may define an aperture therethrough functioning as the passage. The,seal member may comprise a gel material. A zero closure seal may be disposed with n the portal housing to substantially close the axial bore in the absence of the surgical object.
Other embodiments are also envisioned.
BRIEF DES~RIPTION OF THE DRAWINGS
Preferred embodiments of the present disclosure will be better appreciated by reference to the drawings wherein:
FIG.1 is a perspective view with parts separated of the surgical portal apparatus in accordance with the principles of the present disclosure illustrating, the seal assembly and the surgical portal assembly;
FIG. 2 is a side cross-sectional view of the seal assembly and the portal housing of the', surgical portal assembly;
FIG. 3 is a perspective view with parts separated of the seal assembly of the surgical portal'i apparatus;
FIGS. 4 and 5 are frontal and rear perspective views of the seal member of the seal assem~ly;
FIGS. 6 and 7 are front and rear plan views of the seal member of the seal assembly;
FIG. 8 is a side plan view of the seal member; and FIGS. 9 and 10 are frontal and rear perspective views of an alternate embodiment o' the seal member of the seal assembly.
DETAILED ~ESCRIPTION OF THE EMBODIMENTS
The portal apparatus of the present disclosure is capable of accommodating objects of varying diameters, e.g., including instruments from about 4.5 millimeter (mm) to about 15 millimeter (mm), during a minimally invasive surgical procedure.
Moreover, the portal apparatus contemplates the introduction and manipulation of various types of surgical objects or instrumentation adapted for insertion through a trocar and/or cannula assembly while maintaining a fluid tight interface about the instrumentation to prevent gas and/or fluid leakage from the established pneumoperitoneum so as to preserve the atmospheric injtegrity of a surgical procedure. Specifically, the portal apparatus includes a seal assembly Which facilitates lateral and/or angular manipulation of the surgical instrument while also maintaining a seal about the instrument.
Examples of instrumentation contemplated for use with the portal apparatus include clip appliers, graspers, dissectors, retractors, staplers, laser probes, photographic devices, endos~opes and laparoscopes, tubes, obturators and the like. Such instruments will be collectively referred to herein as "instruments or instrumentation".
FIG. 8 is a side plan view of the seal member; and FIGS. 9 and 10 are frontal and rear perspective views of an alternate embodiment o' the seal member of the seal assembly.
DETAILED ~ESCRIPTION OF THE EMBODIMENTS
The portal apparatus of the present disclosure is capable of accommodating objects of varying diameters, e.g., including instruments from about 4.5 millimeter (mm) to about 15 millimeter (mm), during a minimally invasive surgical procedure.
Moreover, the portal apparatus contemplates the introduction and manipulation of various types of surgical objects or instrumentation adapted for insertion through a trocar and/or cannula assembly while maintaining a fluid tight interface about the instrumentation to prevent gas and/or fluid leakage from the established pneumoperitoneum so as to preserve the atmospheric injtegrity of a surgical procedure. Specifically, the portal apparatus includes a seal assembly Which facilitates lateral and/or angular manipulation of the surgical instrument while also maintaining a seal about the instrument.
Examples of instrumentation contemplated for use with the portal apparatus include clip appliers, graspers, dissectors, retractors, staplers, laser probes, photographic devices, endos~opes and laparoscopes, tubes, obturators and the like. Such instruments will be collectively referred to herein as "instruments or instrumentation".
In the following discussion, the term "proximal" or "trailing" will refer to the portion of' the portal apparatus nearest to the clinician during operation while the term "distal" or "loading" will refer to that portion of the portal apparatus most remote to the clinician.
Referring now to the drawings, in which like reference numerals identify identical or sq}bstantially similar parts throughout the several views, FIG. 1 illustrates the portal apparat s 100 of the present disclosure. Portal apparatus 100 includes portal ~
assembly 200'i and seal assembly 300. Seal assembly 300 may be an integral component of portal assemb y 200, or, in the alternative, may be releasably connectable to the portal assembly 200 via various contemplated means. Seal assembly 300 will be discussed in greater detail ~ereinbelow. Portal assembly 200 may be any member suitable for the intended purpbse of accessing a body cavity and typically defines a passageway permitting introduction of instruments or the clinician's hand therethrough. Portal assembly 200 is particularly adapted for use in laparoscopic surgery where the peritoneal cavity is insufflated witlh a suitable gas, e.g., CO2, to raise the cavity wall from the internal organs therein. Portal assembly 200 is typically used with an obturator assembly 400 which may be blunt, a non-bladed, or a sharp pointed instrument positionable within the passageway of the portal app~ratus 100. Obturator assembly 400 is utilized to penetrate the abdominal wall to introd ce the portal apparatus 100 through the abdominal wall, and then subsequently i removed from the portal assembly 200 to permit introduction of the surgical instru entation utilized to perform the procedure through the passageway. An example of sui able obturator assembly 400 is disclosed in commonly assigned U.S. Patent No. 6,497,71 to Green et al., the entire contents of which are incorporated herein by its entirety.
Portal assembly 200 includes portal housing 202 and portal member 204 connected to Ghe portal housing 202 and extending therefrom. Portal member 204 defines a longitudinal axis "k" extending along the length of the portal member 204.
Portal housing 202 and portal member 204 further define internal longitudinal passage 206 dimensioned to permit passag'p of surgical instrumentation. Portal member 204 may be formed of any suitable medi al grade material, such as stainless steel or other rigid materials, including polymeric maierials, such as polycarbonate, or the like. Portal member 204 may be transparent oropaque. The diameter of portal member 204 may vary, but, typically ranges from about 4.~ millimeters (mm) to about 15 millimeters (mm). Portal housing 202 and portal membet 204 may be separate components securely connected to each other, or, in the alternative may be a single monolithically formed unit.
Referring now to FIGS. 1-2, portal housing 202 defines a generally circular cross-section Ond possesses diametrically opposed leg portions 208. Zero closure sea1210 fabricated frorh a resilient material, e.g., rubber, is positioned within the interior of portal housing 202. ~ea1210 includes circumferential flange portion 210a which rests on a correspondingly dimensioned circumferential ledge 212 within portal housing 202. Seal 210 generally defines a duck bill shape having two planar tapering portions 216 which intersect at thOr distal ends to define slit 218. Slit 218 permits passage of the elongated object throug4 the seal 210, but, in the absence of an instrument, and particularly when portal membei 204 is positioned within an insufflated body cavity, slit 218 closes to seal . , _ _ longitudinal 11 assage 206. Seal 210 also includes at least one, preferably two, reinforcing ribs 220 to stabilize the seal. Ribs 220 are positioned to engage the instrument to guide the instrument th>rough slit 218 and prevent piercing of the seal 210 by the tip of the instrument.
Portal assembly 200 also includes stabilizing plate 220 which is positioned against flangel portion 210a of seal 208 to provide support for sea1208 during introduction and withdrawal of an elongated instrument. Stabilizing plate 220 includes two diametrically opposed extensions 222 (FIG. 1) which are received within the corresponding' ly dimensioned leg portions 228 of portal housing 202. In the preferred embodiment, stabilizing plate 220 is securely attached to the portal housing 202 at contact points along the extensions of the respective components by spot welding, adhesives or the like.
Stop cock valve 226 may be incorporated as part of portal housing 202 to permit the pas5age of insufflation gases through portal member 204 and into the body cavity. A suitajble valve for this purpose is available from the Burron OEM
Division of B.
Braun Medical, Inc. (Model No. 55401022).
Referring now to FIG. 3, in conjunction with FIG. 2, the seal assembly 300 of surgical po al apparatus 100 will be described in detail. Seal assembly 300 includes end cap 302, stabil zer plate 304, seal member 306 and seal housing 308. End cap 302, stabilizer plate; 304 and seal housing 308 form the outer seal body of seal assembly 300, . ~.
which house the sealing component, i.e., seal member 306.
End cap 302 is generally cylindrically-shaped and includes a proximal end portion 302a efining a diameter which is less than the diameter of the remaining portion of the end cap 302 and an inner peripheral ledge 310 which supports stabilizer plate 304.
~II
Stabilizer plat e 304 defines an aperture 312 and assists in supporting seal member 306 and retaining the sleal member 306 between end cap 302 and seal housing 308. Seal housing 308 includes ~entral opening 312, and defines inner annular rib 314. Seal housing 308 receives end p 302 when in the assembled condition to enclose the sealing components.
The distal end face of seal housing 308 includes two opposed rib portions 316 extending radially inwar4ly. Rib portions 316 assist in mounting seal assembly 300 to portal assembly 200 ps will be appreciated from the description provided below.
Referring now to FIGS. 4-8, in conjunction with FIGS. 2-3, seal member 306 will be discussed in detail. Seal member 306 is mounted within seal housing 308 by any conventioraal means. For example, seal member 306 may be secured within end cap 302 and securc d between inner peripheral ledge 310 and inner annular rib 314 of seal housing 308. Seal member 306 may be secured within seal housing 308 in a manner to prevent longital dinal or radial movement of the entire seal member, i.e., secured in fixed relation with e d cap 302 and seal housing 308.
eal member 306 is generally disk shaped and defines leading (distal) and trailing (proxi al) ends faces 318, 320. Trailing end face 320 includes an annular recess 322 generally concentrically arranged about seal axis "m". Annular recess 322 is in communicatic~n with central seal aperture or passage 324. Annular recess 322 may be adapted to receive and/or guide the surgical object toward seal aperture 324 during introduction of the surgical object.
Seal aperture 324 extends through leading and trailing end faces 318, 320 of seal member 300. Seal aperture 324 is defined within inner seal portions 326 (FIG. 2) and is adapted to expand upon insertion of the object whereby the inner seal portions 326 defining the soal aperture 324 establish a fluid tight seal about the surgical object.
Although shown as a circular in configuration, seal aperture 324 may assume the configuration including rectangular and may also be in the form of a slit.
Leading end face 318 defines a grid or waffle structure having a plurality of interconnecteo struts 328 with recesses 330 therebetween. Struts 328 preferably extend in perpendicular',arrangement to define rectangular or square recesses 330 at least adjacent central seal aplerture 324. Recesses 330 adjacent the outer periphery of seal member 306 may include ao arcuate outer side as provided by the circular periphery of the seal member.
Struts 328 define a lattice structure which is capable of flexing during offset or angular mapipulation of a surgical object and return to its original configuration upon removal of the object. Moreover, the lattice or waffle geometry assists in preventing "cat-eyeing" that is' caused by off-axis manipulation of the surgical object. In particular, struts 328 with the ssistance of recesses 330 are capable of flexing to permit seal aperture 326 to follow the of -set motion of the instrument.
i Seal member 306 may accommodate instruments ranging from 4.5 mm to about 12.5 mxn in diameter, to seal against a minimum pressure of 12 mm Hg provided by an insufflated body cavity and create very little frictional force with instruments inserted through the s$al member. Seal member 306 may be fabricated from suitable thermoplastic elastomers. In the alternative, seal member 306 may be fabricated from a low durometer thermoplasticjelastomer or a gel material. Other materials are also envisioned.
The assembly of seal assembly 300 now will be discussed. Stabilizer plate 304 is positioiied within end cap 302 such that the plate 304 rests on inner peripheral ledge 310 defined within the end cap 302. Thereafter, seal member 306 is positioned onto stabilizer plate 304. Seal housing 308 is positioned over the entire unit with the seal housing 308 receiving the distal portion of end cap 302. In this assembled condition, seal member 306 it trapped between inner peripheral ledge 310 of end cap 302 and annular rib 314 of seal hoiusing 308.
Seal assembly 300 now in its fully assembled condition can be mounted to portal assembly 200. With reference to FIGS. 1-3, assembled seal assembly 200 is detachably mqunted adjacent stabilizing plate 228 with the partial annular thread 228 (FIG.
2) of the stabiluzing plate 220 being received within peripheral groove 322 defined in seal housing 308. ~ea1 assembly 300 is rotated to cause engagement of the radially inwardly projecting rib portions 316 with partial annular thread 228 to releasably lock the seal assembly 200 to the cannula housing 202. Other means for detachably connecting the seal assembly 200 to cannula housing 202 can be readily determined by one skilled in the art such as screw threads, adhesives, bayonet locking, and the like.
FIGS. 9-10 illustrate an alternate embodiment of seal member 500. In accordance w4h this embodiment, seal member 500 includes leading and trailing end faces 502, 504. Tr~iling or proximal end face 504 includes an annular wall 506 depending therefrom. A nular wall 506 defines an enlarged aperture 508 for receiving the surgical object to guid the surgical object toward seal aperture 510. Annular wa11506 may include inner tapered all surface 512 to also assist in guiding the surgical object toward the seal axis "m". Traliling end face 504 further defines a tapered wall surface 514 circumscribing seal aperture $10 to guide the surgical object toward the aperture.
Leading end face 502 of seal member 500 includes a gridiron or waffle arrangement defined by a plurality of perpendicular struts 516 in intersecting relation.
Adjacent para'llel struts 516 are spaced a greater distance than the prior embodiment to define relatively enlarged rectangular recesses 518. This arrangement may provide greater flexibility thaii the embodiment of FIGS. 1- 8 to further assist or permit offset manipulation n f the surgical object.
!-Although the illustrative embodiments of the present disclosure have been described her in with reference to the accompanying drawings, it is to be understood that ., . ....,,'I_ _.. _ the disclosure is not limited to those precise embodiments, and that various other changes and modificat ons may be effected therein by one skilled in the art without departing from the scope or s irit of the disclosure.
Referring now to the drawings, in which like reference numerals identify identical or sq}bstantially similar parts throughout the several views, FIG. 1 illustrates the portal apparat s 100 of the present disclosure. Portal apparatus 100 includes portal ~
assembly 200'i and seal assembly 300. Seal assembly 300 may be an integral component of portal assemb y 200, or, in the alternative, may be releasably connectable to the portal assembly 200 via various contemplated means. Seal assembly 300 will be discussed in greater detail ~ereinbelow. Portal assembly 200 may be any member suitable for the intended purpbse of accessing a body cavity and typically defines a passageway permitting introduction of instruments or the clinician's hand therethrough. Portal assembly 200 is particularly adapted for use in laparoscopic surgery where the peritoneal cavity is insufflated witlh a suitable gas, e.g., CO2, to raise the cavity wall from the internal organs therein. Portal assembly 200 is typically used with an obturator assembly 400 which may be blunt, a non-bladed, or a sharp pointed instrument positionable within the passageway of the portal app~ratus 100. Obturator assembly 400 is utilized to penetrate the abdominal wall to introd ce the portal apparatus 100 through the abdominal wall, and then subsequently i removed from the portal assembly 200 to permit introduction of the surgical instru entation utilized to perform the procedure through the passageway. An example of sui able obturator assembly 400 is disclosed in commonly assigned U.S. Patent No. 6,497,71 to Green et al., the entire contents of which are incorporated herein by its entirety.
Portal assembly 200 includes portal housing 202 and portal member 204 connected to Ghe portal housing 202 and extending therefrom. Portal member 204 defines a longitudinal axis "k" extending along the length of the portal member 204.
Portal housing 202 and portal member 204 further define internal longitudinal passage 206 dimensioned to permit passag'p of surgical instrumentation. Portal member 204 may be formed of any suitable medi al grade material, such as stainless steel or other rigid materials, including polymeric maierials, such as polycarbonate, or the like. Portal member 204 may be transparent oropaque. The diameter of portal member 204 may vary, but, typically ranges from about 4.~ millimeters (mm) to about 15 millimeters (mm). Portal housing 202 and portal membet 204 may be separate components securely connected to each other, or, in the alternative may be a single monolithically formed unit.
Referring now to FIGS. 1-2, portal housing 202 defines a generally circular cross-section Ond possesses diametrically opposed leg portions 208. Zero closure sea1210 fabricated frorh a resilient material, e.g., rubber, is positioned within the interior of portal housing 202. ~ea1210 includes circumferential flange portion 210a which rests on a correspondingly dimensioned circumferential ledge 212 within portal housing 202. Seal 210 generally defines a duck bill shape having two planar tapering portions 216 which intersect at thOr distal ends to define slit 218. Slit 218 permits passage of the elongated object throug4 the seal 210, but, in the absence of an instrument, and particularly when portal membei 204 is positioned within an insufflated body cavity, slit 218 closes to seal . , _ _ longitudinal 11 assage 206. Seal 210 also includes at least one, preferably two, reinforcing ribs 220 to stabilize the seal. Ribs 220 are positioned to engage the instrument to guide the instrument th>rough slit 218 and prevent piercing of the seal 210 by the tip of the instrument.
Portal assembly 200 also includes stabilizing plate 220 which is positioned against flangel portion 210a of seal 208 to provide support for sea1208 during introduction and withdrawal of an elongated instrument. Stabilizing plate 220 includes two diametrically opposed extensions 222 (FIG. 1) which are received within the corresponding' ly dimensioned leg portions 228 of portal housing 202. In the preferred embodiment, stabilizing plate 220 is securely attached to the portal housing 202 at contact points along the extensions of the respective components by spot welding, adhesives or the like.
Stop cock valve 226 may be incorporated as part of portal housing 202 to permit the pas5age of insufflation gases through portal member 204 and into the body cavity. A suitajble valve for this purpose is available from the Burron OEM
Division of B.
Braun Medical, Inc. (Model No. 55401022).
Referring now to FIG. 3, in conjunction with FIG. 2, the seal assembly 300 of surgical po al apparatus 100 will be described in detail. Seal assembly 300 includes end cap 302, stabil zer plate 304, seal member 306 and seal housing 308. End cap 302, stabilizer plate; 304 and seal housing 308 form the outer seal body of seal assembly 300, . ~.
which house the sealing component, i.e., seal member 306.
End cap 302 is generally cylindrically-shaped and includes a proximal end portion 302a efining a diameter which is less than the diameter of the remaining portion of the end cap 302 and an inner peripheral ledge 310 which supports stabilizer plate 304.
~II
Stabilizer plat e 304 defines an aperture 312 and assists in supporting seal member 306 and retaining the sleal member 306 between end cap 302 and seal housing 308. Seal housing 308 includes ~entral opening 312, and defines inner annular rib 314. Seal housing 308 receives end p 302 when in the assembled condition to enclose the sealing components.
The distal end face of seal housing 308 includes two opposed rib portions 316 extending radially inwar4ly. Rib portions 316 assist in mounting seal assembly 300 to portal assembly 200 ps will be appreciated from the description provided below.
Referring now to FIGS. 4-8, in conjunction with FIGS. 2-3, seal member 306 will be discussed in detail. Seal member 306 is mounted within seal housing 308 by any conventioraal means. For example, seal member 306 may be secured within end cap 302 and securc d between inner peripheral ledge 310 and inner annular rib 314 of seal housing 308. Seal member 306 may be secured within seal housing 308 in a manner to prevent longital dinal or radial movement of the entire seal member, i.e., secured in fixed relation with e d cap 302 and seal housing 308.
eal member 306 is generally disk shaped and defines leading (distal) and trailing (proxi al) ends faces 318, 320. Trailing end face 320 includes an annular recess 322 generally concentrically arranged about seal axis "m". Annular recess 322 is in communicatic~n with central seal aperture or passage 324. Annular recess 322 may be adapted to receive and/or guide the surgical object toward seal aperture 324 during introduction of the surgical object.
Seal aperture 324 extends through leading and trailing end faces 318, 320 of seal member 300. Seal aperture 324 is defined within inner seal portions 326 (FIG. 2) and is adapted to expand upon insertion of the object whereby the inner seal portions 326 defining the soal aperture 324 establish a fluid tight seal about the surgical object.
Although shown as a circular in configuration, seal aperture 324 may assume the configuration including rectangular and may also be in the form of a slit.
Leading end face 318 defines a grid or waffle structure having a plurality of interconnecteo struts 328 with recesses 330 therebetween. Struts 328 preferably extend in perpendicular',arrangement to define rectangular or square recesses 330 at least adjacent central seal aplerture 324. Recesses 330 adjacent the outer periphery of seal member 306 may include ao arcuate outer side as provided by the circular periphery of the seal member.
Struts 328 define a lattice structure which is capable of flexing during offset or angular mapipulation of a surgical object and return to its original configuration upon removal of the object. Moreover, the lattice or waffle geometry assists in preventing "cat-eyeing" that is' caused by off-axis manipulation of the surgical object. In particular, struts 328 with the ssistance of recesses 330 are capable of flexing to permit seal aperture 326 to follow the of -set motion of the instrument.
i Seal member 306 may accommodate instruments ranging from 4.5 mm to about 12.5 mxn in diameter, to seal against a minimum pressure of 12 mm Hg provided by an insufflated body cavity and create very little frictional force with instruments inserted through the s$al member. Seal member 306 may be fabricated from suitable thermoplastic elastomers. In the alternative, seal member 306 may be fabricated from a low durometer thermoplasticjelastomer or a gel material. Other materials are also envisioned.
The assembly of seal assembly 300 now will be discussed. Stabilizer plate 304 is positioiied within end cap 302 such that the plate 304 rests on inner peripheral ledge 310 defined within the end cap 302. Thereafter, seal member 306 is positioned onto stabilizer plate 304. Seal housing 308 is positioned over the entire unit with the seal housing 308 receiving the distal portion of end cap 302. In this assembled condition, seal member 306 it trapped between inner peripheral ledge 310 of end cap 302 and annular rib 314 of seal hoiusing 308.
Seal assembly 300 now in its fully assembled condition can be mounted to portal assembly 200. With reference to FIGS. 1-3, assembled seal assembly 200 is detachably mqunted adjacent stabilizing plate 228 with the partial annular thread 228 (FIG.
2) of the stabiluzing plate 220 being received within peripheral groove 322 defined in seal housing 308. ~ea1 assembly 300 is rotated to cause engagement of the radially inwardly projecting rib portions 316 with partial annular thread 228 to releasably lock the seal assembly 200 to the cannula housing 202. Other means for detachably connecting the seal assembly 200 to cannula housing 202 can be readily determined by one skilled in the art such as screw threads, adhesives, bayonet locking, and the like.
FIGS. 9-10 illustrate an alternate embodiment of seal member 500. In accordance w4h this embodiment, seal member 500 includes leading and trailing end faces 502, 504. Tr~iling or proximal end face 504 includes an annular wall 506 depending therefrom. A nular wall 506 defines an enlarged aperture 508 for receiving the surgical object to guid the surgical object toward seal aperture 510. Annular wa11506 may include inner tapered all surface 512 to also assist in guiding the surgical object toward the seal axis "m". Traliling end face 504 further defines a tapered wall surface 514 circumscribing seal aperture $10 to guide the surgical object toward the aperture.
Leading end face 502 of seal member 500 includes a gridiron or waffle arrangement defined by a plurality of perpendicular struts 516 in intersecting relation.
Adjacent para'llel struts 516 are spaced a greater distance than the prior embodiment to define relatively enlarged rectangular recesses 518. This arrangement may provide greater flexibility thaii the embodiment of FIGS. 1- 8 to further assist or permit offset manipulation n f the surgical object.
!-Although the illustrative embodiments of the present disclosure have been described her in with reference to the accompanying drawings, it is to be understood that ., . ....,,'I_ _.. _ the disclosure is not limited to those precise embodiments, and that various other changes and modificat ons may be effected therein by one skilled in the art without departing from the scope or s irit of the disclosure.
Claims (11)
1. A surgical portal apparatus, which comprises:
a portal housing;
an elongated portal member connected to the portal housing and depending therefrom, the portal member defining a central longitudinal axis, the portal housing and the portal member having an axial bore for reception and passage of a surgical object; and a seal member comprising a resilient material and being mounted to the portal housing, the seal member including leading and trailing faces and having inner portions defining a passage to permit passage of the surgical object, one of the leading and trailing faces defining a plurality of recessed cells formed within interconnected struts, the interconnected struts being relatively flexible to flex upon radial offset manipulation of the object to permit corresponding movement of the passage while substantially maintaining a seal about the surgical object.
a portal housing;
an elongated portal member connected to the portal housing and depending therefrom, the portal member defining a central longitudinal axis, the portal housing and the portal member having an axial bore for reception and passage of a surgical object; and a seal member comprising a resilient material and being mounted to the portal housing, the seal member including leading and trailing faces and having inner portions defining a passage to permit passage of the surgical object, one of the leading and trailing faces defining a plurality of recessed cells formed within interconnected struts, the interconnected struts being relatively flexible to flex upon radial offset manipulation of the object to permit corresponding movement of the passage while substantially maintaining a seal about the surgical object.
2. The surgical portal apparatus according to claim 1 wherein at least some of the recessed cells define a generally rectangular arrangement.
3. The surgical portal apparatus according to claim 1 wherein the leading end face of the seal member has the recessed cells.
4. The surgical portal apparatus according to claim 3 wherein the trailing end face of the seal member defines a seal recess circumscribing the passage to facilitate reception and passage of the surgical object through the passage.
5. The surgical portal apparatus according to claim 4 wherein the seal recess is generally annular.
6. The surgical portal apparatus according to claim 3 wherein the seal member includes an annular seal collar depending from the trailing end face.
7. The surgical portal apparatus according to claim 6 wherein the annular seal collar includes an internal wall surface, the wall surface being tapered to facilitate alignment of the surgical object with the passage during introduction of the surgical object within the seal member.
8. The surgical portal apparatus according to claim 6 wherein the trailing end face includes an internal tapered wall circumscribing the passage to facilitate alignment of the surgical object with the passage during passage through the seal member.
9. The surgical portal apparatus according to claim 1 wherein the seal member defines an aperture therethrough, the aperture being the passage.
10. The surgical portal apparatus according to claim 1 wherein the seal member comprises a gel material.
11. The surgical portal apparatus according to claim 1 including a zero closure seal adapted to substantially close the axial bore in the absence of the surgical object.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7553308P | 2008-06-25 | 2008-06-25 | |
US61/075,533 | 2008-06-25 | ||
US12/468,133 US8012129B2 (en) | 2008-06-25 | 2009-05-19 | Surgical portal apparatus with waffle seal |
US12/468,133 | 2009-05-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2667723A1 true CA2667723A1 (en) | 2009-12-25 |
Family
ID=41448326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002667723A Abandoned CA2667723A1 (en) | 2008-06-25 | 2009-05-29 | Surgical portal apparatus with waffle seal |
Country Status (5)
Country | Link |
---|---|
US (1) | US8012129B2 (en) |
EP (1) | EP2147644A1 (en) |
JP (1) | JP5513019B2 (en) |
AU (1) | AU2009202289B2 (en) |
CA (1) | CA2667723A1 (en) |
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- 2009-06-09 AU AU2009202289A patent/AU2009202289B2/en not_active Ceased
- 2009-06-17 JP JP2009144299A patent/JP5513019B2/en not_active Expired - Fee Related
- 2009-06-23 EP EP09251621A patent/EP2147644A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
AU2009202289A1 (en) | 2010-01-14 |
JP2010005389A (en) | 2010-01-14 |
EP2147644A1 (en) | 2010-01-27 |
US8012129B2 (en) | 2011-09-06 |
AU2009202289B2 (en) | 2013-10-17 |
US20090326467A1 (en) | 2009-12-31 |
JP5513019B2 (en) | 2014-06-04 |
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