US20070119901A1 - Surgical fastener applying apparatus - Google Patents
Surgical fastener applying apparatus Download PDFInfo
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- US20070119901A1 US20070119901A1 US11/699,699 US69969907A US2007119901A1 US 20070119901 A1 US20070119901 A1 US 20070119901A1 US 69969907 A US69969907 A US 69969907A US 2007119901 A1 US2007119901 A1 US 2007119901A1
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- cartridge
- lock
- staples
- applying apparatus
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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
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
- A61B2017/0725—Stapler heads with settable gap between anvil and cartridge, e.g. for different staple heights at different shots
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
- A61B2017/07271—Stapler heads characterised by its cartridge
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B2017/320052—Guides for cutting instruments
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/03—Automatic limiting or abutting means, e.g. for safety
- A61B2090/038—Automatic limiting or abutting means, e.g. for safety during shipment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
- A61B2090/0801—Prevention of accidental cutting or pricking
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B90/08—Accessories or related features not otherwise provided for
- A61B2090/0814—Preventing re-use
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- 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
An improved surgical fastener applying apparatus includes a cartridge half-section and an anvil half-section with the cartridge and anvil half-sections being relatively movable from an unclamped position to a fully clamped position. The apparatus includes a replaceable staple cartridge assembly having a plurality of surgical staples and a pivotably mounted safety lock-out. The safety lock-out is pivotable between an initial position in which a relative movement of the cartridge and anvil half-sections to the fully clamped position is permitted and a blocking position in which a relative movement of the cartridge and anvil half-sections to return them to their fully clamped position after the plurality of staples have been at least partially fired is prevented. The apparatus further includes a pivotably mounted firing lever for moving a pair of camming surfaces longitudinally. In addition, each of the presently disclosed cartridge and anvil half-sections of the fastener applying apparatus includes a clamping lever, which clamping levers are configured and adapted to enable the applying apparatus to be opened by either one of the cartridge half-section and the anvil half-section.
Description
- The present application claims priority of U.S. provisional application Ser. No. 60/240,461 filed on Oct. 13, 2000, the entire contents of which are hereby incorporated by reference.
- 1. Technical Field
- The present disclosure relates to surgical fastener applying apparatus and more particularly to surgical fastener appliers for sequentially applying a plurality of surgical fasteners to body tissue.
- 2. Discussion of Related Art
- Surgical devices wherein tissue is first grasped or clamped between opposing jaw structures and then joined by means of surgical fasteners are well known in the art. In some such instruments a knife is provided to cut the tissue which has been joined by the fasteners. The fasteners are typically in the form of surgical staples however, other surgical fasteners may also be utilized, for example, clips or two part polymeric surgical fasteners.
- Instruments for applying surgical fasteners typically include two elongated beam members which are respectively used to capture or clamp tissue therebetween. Typically, one of the beam members carries a disposable cartridge which houses a plurality of staples arranged in at least two lateral rows while the other beam member comprises an anvil which defines a surface for forming the staple legs as the staples are driven from the cartridge. Where two part fasteners are used, this beam member carries the mating part, e.g. the receiver, to the fasteners driven from the cartridge. Generally, the staple formation process is effected by the interaction between a longitudinally moving camming surface and a series of individual staple pusher member. As the camming surface travels longitudinally through the cartridge carrying member, the individual pusher members are biased laterally acting upon the staples to sequentially eject them from the cartridge. A knife may travel with the pusher between the staple rows to longitudinally cut the tissue between the rows of formed staples. Examples of such instruments are disclosed in U.S. Pat. No. 3,079,606 and U.S. Pat No. 3,490,675.
- A later stapler disclosed in U.S. Pat. No. 3,499,591 applies a double row of staples on each side of the incision. This is accomplished by providing a cartridge assembly in which a cam member moves through an elongate guide path between two sets of staggered staple carrying grooves. Staple drive members are located within the grooves and are positioned in such a manner so as to be contacted by the longitudinally moving cam to effect ejection of the staples.
- It is an object of the present invention to provide a surgical fastener applying apparatus which apparatus will not fire if a disposable staple cartridge is not properly loaded within the apparatus or is not loaded in the apparatus at all.
- It is another object of the present invention to provide a surgical fastener applying apparatus which will not open during the firing stroke of the apparatus.
- It is a further object of the present invention surgical fastener applying apparatus which will not accept a completely fired or a partially fired disposable staple cartridge therein.
- It is yet another object of the present invention to provide a surgical fastener applying apparatus which will not fire while in an unclamped state.
- The presently disclosed apparatus includes a cartridge half-section and an anvil half-section with the cartridge and anvil half-sections being relatively movable from an unclamped position to a fully clamped position. The apparatus farther includes a replaceable staple cartridge assembly receivable in the cartridge half-section. The cartridge assembly includes a plurality of surgical staples abutting a plurality of staple pusher members and a pivotably mounted safety lock-out. The safety lock-out is pivotable between an initial position, which permits a relative movement of the cartridge and anvil half-sections to the fully clamped position, and a blocking position, which prevents a relative movement of the cartridge and anvil half-sections from returning to the fully clamped position after the plurality of staples have been at least partially fired. The apparatus further includes a pair of camming surface extensions extending from a cam bar channel and positioned within the cartridge half-section and a pivotably mounted firing lever operatively associated with the pair of camming surfaces to move the pair of camming surfaces longitudinally, thereby sequentially firing the plurality of surgical staples in a direction transverse to a direction of travel of the pair of camming surfaces.
- In addition, each of the presently disclosed cartridge and anvil half-sections of the fastener applying apparatus includes a clamping lever, which clamping levers are configured and adapted to enable the applying apparatus to be opened by either one of the cartridge half-section and the anvil half-section. The apparatus including a clamp latch configured and adapted to retain the clamp levers in a clamped orientation and a safety interlock assembly configured and adapted to prevent opening of either of the clamping levers after the firing lever has been moved distally.
- Various embodiments of the presently disclosed surgical fastener applying apparatus will be described herein with reference to the accompanying drawing figures wherein:
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FIG. 1 is a perspective view of one embodiment of a surgical fastener apparatus constructed in accordance with the present disclosure; -
FIG. 2 is a top plan view of the embodiment ofFIG. 1 ; -
FIG. 3 is a side elevation view of the embodiment ofFIG. 1 ; -
FIG. 4 is a side elevation view of the embodiment ofFIG. 1 taken from the opposite side of that shown inFIG. 3 ; -
FIG. 5 is a bottom plan view of the embodiment ofFIG. 1 ; -
FIG. 6 is a front elevation view of the embodiment ofFIG. 1 ; -
FIG. 7 is a rear elevation view of the embodiment ofFIG. 1 ; -
FIG. 8 is a perspective view of a disposable staple cartridge assembly of the presently disclosed surgical fastener applying apparatus; -
FIG. 9 is a perspective view with parts separated of the disposable staple cartridge assembly ofFIG. 8 ; -
FIG. 10 is a schematic view of a staple pusher pair; -
FIG. 11 is an enlarged left distal perspective view of a staple cartridge loading and lockout mechanism; -
FIG. 12 is an enlarged right side proximal perspective view of the loading and lockout mechanism ofFIG. 11 ; -
FIG. 13 is a perspective view with parts separated showing installation of a staple cartridge assembly on a cartridge half-section of the presently disclosed surgical fastener applying apparatus; -
FIG. 14 is an enlarged perspective view from the bottom of the loading and lockout mechanism with a staple cartridge in place thereon; -
FIG. 15 is an enlarged perspective view similar toFIG. 12 , with a staple cartridge in place; -
FIG. 16 is an enlarged side perspective view which shows the relative positioning of the loading and lockout mechanism with a staple cartridge installed and with an anvil half-section in place in a clamped condition; -
FIG. 17 is a perspective view which shows a surgical stapler apparatus after partial or complete firing in an unclamped condition with a staple cartridge safety lockout in a locked out position; -
FIG. 18 is an enlarged view of the indicated area of detail ofFIG. 17 ; -
FIG. 19 is a perspective view of the surgical stapler apparatus opened from an anvil half-section side with an anvil half-section clamp lever opened and a cartridge half-section clamp lever closed; -
FIG. 20 is a perspective view of the surgical stapler apparatus opened from a cartridge half-section side with a cartridge half-section clamp lever opened and an anvil half-section clamp lever closed; -
FIG. 21 is a perspective view with parts separated which shows the structural relationship of the various components of a clamp lever lockout and safety interlock mechanism; -
FIG. 22 is a plan view looking down on the anvil half-section of the surgical stapler apparatus with a firing lever in the proximal-most position; -
FIG. 23 is a cross-sectional view taken along section line 23-23 ofFIG. 22 ; -
FIG. 24 is an enlarged view of the indicated area of detail ofFIG. 23 ; -
FIG. 25 is an enlarged view of the indicated area of detail ofFIG. 23 ; -
FIG. 26 is a plan view similar toFIG. 22 , which shows the firing lever advanced distally a short distance; -
FIG. 27 is a cross-sectional view taken along section line 27-27 ofFIG. 26 ; -
FIG. 28 is an enlarged view of the indicated area of detail ofFIG. 27 ; -
FIG. 29 is an enlarged view of the indicated area of detail ofFIG. 27 ; -
FIG. 30 is a perspective view of the cartridge half-section of the surgical stapler apparatus; -
FIG. 31 is a perspective view of a disposable staple cartridge assembly according to an alternative embodiment of the present invention; -
FIG. 32 is a perspective view, with parts separated, of the disposable staple cartridge assembly ofFIG. 31 ; -
FIG. 33 is a perspective view of the disposable staple cartridge assembly as shown inFIG. 31 with the shipping wedge removed therefrom; -
FIG. 34 is a perspective view of a cartridge half-section according to the alternative embodiment of the present invention; -
FIG. 35 is an enlarged left distal perspective view of a staple cartridge loading and lockout mechanism; -
FIG. 36 is an enlarged right side proximal perspective view of the loading and lockout mechanism ofFIG. 35 ; -
FIG. 37 is an enlarged perspective view, as seen from the bottom of the loading and lock out mechanism, according to the alternative embodiment of the present invention, with a staple cartridge in place thereon; -
FIG. 38 is a partially exploded enlarged perspective view, as seen from the bottom of the loading and lock out mechanism shown inFIG. 38 ; -
FIG. 39 is an enlarged perspective view similar toFIG. 36 , with a staple cartridge in place; -
FIG. 40 is an enlarged side perspective view which shows the relative positioning of the loading and lockout mechanism with a staple cartridge installed and with an anvil half-section in place in a clamped condition; -
FIG. 41 is a perspective view of the surgical stapler apparatus opened from an anvil half-section side with an anvil half-section clamp lever opened and a cartridge half-section clamp lever closed; -
FIG. 42 is a perspective view of the surgical stapler apparatus opened from a cartridge half-section side with a cartridge half-section clamp lever opened and an anvil half-section clamp lever closed; -
FIG. 43 is a perspective view with parts separated which shows the structural relationship of the various components of a clamp lever lockout and safety interlock mechanism; -
FIG. 44 is a cross-sectional view of the surgical stapler taken along the longitudinal center line thereof; -
FIG. 45 is an enlarged view of the indicated area of detail ofFIG. 44 ; -
FIG. 46 is an enlarged view of the indicated area of detail ofFIG. 44 ; -
FIG. 47 is a cross-sectional view of the surgical stapler taken along the longitudinal center line thereof; -
FIG. 48 is an enlarged view of the indicated area of detail ofFIG. 47 ; -
FIG. 49 is an enlarged view of the indicated area of detail ofFIG. 47 ; -
FIG. 50 is a perspective view of the cartridge half-section of the surgical stapler apparatus after partial or complete firing with a staple cartridge safety lockout in a locked out position; and -
FIG. 51 is a perspective view of the surgical stapler apparatus opened from both the cartridge half-section side with the cartridge half-section clamp lever opened and from the anvil half-section side with the anvil half-section clamp lever opened. - Preferred embodiments of the presently disclosed surgical fastener apparatus will now be described in detail with reference to the drawing figures wherein like reference numerals identify similar or identical structural elements. As shown in the drawings and described throughout the following description, as is traditional when referring to relative positioning on a surgical instrument, the term “proximal” refers to the end of the apparatus which is closer to the user and the term “distal” refers to the end of the apparatus which is further away from the user.
- Referring initially to
FIG. 1 , an illustrative embodiment of the presently disclosed surgical fastener apparatus is illustrated therein and designated generally assurgical stapler 10.Surgical stapler 10 is particularly adapted to apply a plurality of adjacent rows of staples to body tissue clamped in between the instrument's two principle sections, a cartridge receiving half-section 12 and an anvil half-section 14. Typical applications of the presently disclosed surgical fastener apparatus are, for example, creating a hemostatic seal in general, thoracic, and urologic surgery for resection, transection and creation of anastomoses. Specific tissue structures in which the instrument may be used are, for example, the stomach, the large and small bowels, lungs and the esophagus. -
FIGS. 1-7 illustrate one preferred overall ornamental design for the presently disclosed surgical fastener applying apparatus wherein. Each of these various figures illustratessurgical stapler 10 with an anvil tip removed to illustrate the end cross-section profile of the anvil half-section. The anvil tip is the same as the tip on the distal end of the staple cartridge. - Referring to
FIGS. 8-10 ,surgical stapler 10 is designed for use with a disposable staple cartridge assembly such as single use disposable loading unit (“SULU”) 16 includes acartridge body 18, a plurality ofstaple pusher members 20, abottom cover 22, aknife 24 having an angled sharpenedleading edge 24 a, a plurality ofstaples 26, a pivotably mountedsafety lockout 28 and aremovable shipping wedge 30. As with known staple cartridge designs,cartridge body 18 has a plurality of rows ofstaple retaining slots 32 formed therein.Surgical stapler 10 may be manufactured and assembled in different sizes to receivedifferent size SULUs 16. For example,surgical stapler 10 can be made in different sizes to accept SULUs having staple line lengths of 60 mm, 80 mnm, and 100 mm. - Alternatively,
SULUs 16 may be adapted such that one commonsurgical stapler 10 will accept multiple different staple count SULUs. For example,SULUs 16 may be configured such that each different staple count SULU shares a commonsize cartridge body 18 to facilitate mounting onsurgical stapler 10. - In the illustrated embodiment, there are two staggered rows of
slots 32 formed on either side of a linear slottedtrack 34 which guidesknife 24 during its longitudinal movement. Asingle staple 26 is positioned in each ofslots 32. The staple rows preferably extend a distance distally beyond the distal end ofknife track 34 to facilitate staple formation beyond the stroke length ofknife 24. -
Staple pushers 20 are aligned one each withslots 32 such that asingle staple pusher 20 is positioned under the staple 26 retained inslot 32.Staple pushers 20 are formed such that they are attached to each other in groups of two offset oriented pusher pairs, shown schematically inFIG. 10 , and have an actuating surface connecting each pair of twopushers 20. - The pusher pairs are arranged in two series, one on each side of slotted
track 34, such that the actuating surfaces of each series of pusher pairs forms a line centered between the staggered row ofstaples 26. The actuating surfaces act as cam followers and interact with a pair of staggered camming surfaces 36, 38 (seeFIG. 11 ) extending from acam bar channel 40 to expel the pairs ofstaples 26 on each side of theknife track 34. As illustrated, camming surfaces 36, 38 form a single angle relative to horizontal. In certain application, for example, with staples having an unformed leg height of about 4.5 mm, camming surfaces 36, 38 may be formed of a plurality of angles to facilitate optimal staple deformation with a given firing force. Ascam bar channel 40 is moved distally this sequence is repeated until the distal movement ofcam bar channel 40 is either stopped intentionally by the user to form less than all ofstaples 26 or until all ofstaples 26 are expelled fromSULU 16. -
Bottom cover 22 partially encloses the bottom of a channel formed by the upper surface and side walls ofcartridge body 18. Alongitudinal ridge 22 a is formed on the upper surface ofbottom cover 22 and serves as a bearing surface forknife bearing channel 42 secured to the bottom edge ofknife 24 as it travels inknife track 34. A pair of slots are formed one on either side oflongitudinal ridge 22 a. The outer limit of each slot being defined by the outer wall ofcartridge body 18 on the respective side ofridge 22 a. These slots facilitate reciprocating longitudinal movement of thecamming surface extensions cam bar channel 40.Knife bearing channel 42 which is wider thanknife track 34, is secured to the bottom surface of the knife such that knife bearingchannel member 42 rides betweenknife track 34 andlongitudinal ridge 22 a ofbottom cover 22. In this manner,knife 24 is prevented from undergoing substantial vertical movement during longitudinal translation inknife track 34. -
Safety lockout 28 is pivotably disposed on the upper proximal end ofcartridge body 18 and is movable from a locked orientation to an unlocked orientation. Preferably,safety lockout 28 is biased away from the locked orientation towards an orientation substantially perpendicular to the longitudinal axis ofcartridge body 18. Any suitable bias member may be utilized such as, for example, springs 44, 46. To overcome the bias towards the perpendicular orientation,safety lockout 28 includes a transversehorizontal surface 28 a (seeFIG. 24 ) formed on the underside thereof which engages ahook 24 b formed on the upper edge surface ofknife 24. This cooperative engagement serves to retainsafety lockout 28 in the locked orientation whereinsafety lockout 28 coversknife 24. - When
surgical stapler 10 has been unclamped, as will be described in greater detail further herein, after either partial or complete firing,safety lockout 28 is biased to the perpendicular orientation (seeFIGS. 17 and 18 ), extending upwardly away from cartridge half-section 12. In this manner,surgical stapler 10 cannot be re-clamped until the partial or completely firedSULU 16 is removed and replaced with anew SULU 16.Safety lockout 28 also provides a cut-out grasping surface 28 b with whichSULU 16 may readily be removed fromsurgical stapler 10. - As previously noted,
shipping wedge 30 is removably attachable tocartridge body 18. When installed onSULU 16,shipping wedge 30 covers the entire surface area of thestaple rows 26 andknife track 34. Additionally,shipping wedge 30 includes anabutment 30 a extending upwardly and proximally from the upper proximal surface ofshipping wedge 30.Abutment 30 a in cooperation withsafety lockout 28 covers sharpeneddistal edge 24 a ofknife 24. This feature prevents the knife from being exposed to the user during handling ofSULU 16. Additionally,abutment 30 a prevents pivotal movement ofsafety lockout 28 from the locked orientation. Thus, even ifSULU 16 is properly loaded onsurgical stapler 10,staples 26 cannot be fired until shippingwedge 30 is first removed. - Shipping
wedge 30 also includes a post 30 b extending downwardly from the underside near the proximal end. Post 30 b fits into a complementary shapedopening 18 c formed incartridge body 18 at the proximal end ofknife track 34. Withshipping wedge 30 in place, post 30 b blocks potential distal movement ofknife 26. In an alternative embodiment,SULUs 16 may also be provided without a knife in applications where it is desirable to perform stapling without transection. In such an embodiment,knife 26 is replaced with a blank element to substitute for the knife to interact withsafety lockout 28. -
Cartridge body 18 is provided with several molded surfaces to facilitate mounting and alignment ofSULU 16 with respect to cartridge half-section 12 ofsurgical stapler 10. Such alignment facilitating surfaces may be formed at any suitable location on the various components ofcartridge body 18 to correspond with complementary surfaces on cartridge half-section 12. In the illustrated embodiment, locating/alignment feature surfaces 18 a are formed extending downwardly on either side ofSULU 16 near the proximal end thereof and moldedsurfaces 18 b are formed on either side ofcartridge body 18 near the distal end thereof. WhenSULU 16 is properly installed onsurgical stapler 10, surfaces 18 a seat in a pair ofnotches 48, 50 (seeFIG. 13 ) formed in cartridge half-section 12. - Referring to
FIGS. 11-16 , a loading and lockout mechanism forSULU 16 will now be described in detail. In these figures, achannel frame 12 a (seeFIG. 21 ) of cartridge half-section 12 is not shown so that the loading and lockout mechanism can be illustrated more clearly. The loading and lockout mechanism facilitates loading ofSULU 16 and prevents firing ofsurgical stapler 10 untilSULU 16 is properly loaded on cartridge half-section 12 andsurgical stapler 10 is properly clamped shut. The loading and lockout mechanism includes arocker 52 which is pivotably mounted tochannel frame 12 a (seeFIG. 21 ) of cartridge half-section 12 by way of transversely extendingpost portions 52 a seating in openings formed through the sidewalls ofchannel frame 12 a.Post portions 52 a are provided with angled downwardly oriented surfaces to facilitate assembly ofrocker 52 withchannel frame 12 a.Rocker 52 is preferably a molded plastic component and is provided with three slots, namely an open bottomedslots cam bar channel 40 and aclosed slot 52 d to permit passage of acenter bar 54. - As best shown in
FIGS. 12 and 14 ,rocker 52 is further provided with a downwardly extending blockingsurface 52 e which is in vertical alignment with an opening formed through the bottom surface ofcam bar channel 40 whencam bar channel 40 is in its proximal-most position.Rocker 52 is biased, by way of aspring 56 being disposed between downwardly extendingleg 52 f and anend wall 58 a of abeam member 58, toward a locked-out position wherein blockingsurface 52 e extends through opening 40 a. In this manner,cam bar channel 40 is prevented from distal longitudinal movement. In versions ofsurgical stapler 10 usingshorter SULUs 16,beam 58 may be eliminated. - Upon loading of
SULU 16 on cartridge half-section as shown inFIG. 15 and 16, the spring bias maintainsrocker 52 in the locked-out position. It is only when anvil half-section 14 is joined with cartridge half-section 12 and the half-sections clamped together thereby causing downwardly extendingleg portions 60 a formed on either side of anvil half-section channel member 60 to bias againstSULU 16, thatrocker 52 is urged to rotate by the camming action of proximal end surface ofSULU 16 against the distal end surface ofrocker 52. In this manner, blockingsurface 52 e is moved out of longitudinal alignment with opening 40 a ofcam bar channel 40 thereby permitting distal longitudinal movement thereof. - Referring to
FIGS. 17 and 18 , oncesurgical stapler 10 has been at least partially fired, if the instrument is opened,safety lockout 28 ofSULU 16 automatically moves to the perpendicular orientation due to the spring bias mounting thereof In this orientation,surgical stapler 10 cannot be re-clamped. Thus, if the user desires to apply further staples,SULU 16 must first be removed and replaced with anon-fired SULU 16. - Referring to
FIGS. 19-21 ,surgical stapler 10 is provided with dual selectable clamping levers 62, 64 and a pivotably mounted firinglever 65. Clamping levers 62, 64 provide the user with the uniquely novel option of openingsurgical stapler 10 from either half-section lever 65 provides the user with the ability to firesurgical stapler 10 from either the left or right side. - Clamping levers 62, 64 are pivotably mounted to cartridge half-
section 12 and anvil half-section 14, respectively. A pair of ergonomic contoured handles 66, 68 are secured to clampinglevers surgical stapler 10 by the user, a pair offriction enhancing inserts handles Inserts sections surgical stapler 10 with a one-handed operation to approximate the captured tissue. - Referring to
FIGS. 21-23 , 25-27 and 29, a clamp latch and safety interlock mechanism is provided at the proximal end ofsurgical stapler 10. The clamp latch and safety interlock mechanism serves to retainclamp levers clamp lever lever 65 is moved distally. Eachhalf section section 12 as shown inFIG. 21 . - The clamp latch and safety interlock mechanism includes a distal
clamp lever latch 74 and aproximal interlock latch 76 which is spring biased distally toward a latched position. Whensurgical stapler 10 is in the clamped configuration with firinglever 65 in the proximal-most position, afiring slide block 78 biases latch 76 proximally to overcome the distal spring bias, as shown inFIG. 25 , to positionledge 76 a out of lateral alignment withproximal ledge 74 a formed onlatch 74 thereby positioninglatch 76 in an unlatched position. In this position, the user my unclamp either clamplever finger pad portions 80 a, 80 b of latch handle,release member 80 which urges latch 74 proximally such that distal ledge 74 b is moved out of lateral alignment with the blocking structure formed on cartridge half-section 12 a or anvil half-section 14 a (not shown). - Once firing
lever 65 is moved distally to begin the firing sequence ofsurgical stapler 10, as shown inFIGS. 26, 27 and 29,slide block 78 also moves distally thereby removing the biasing force which overcame the distal spring bias oflatch 76. Thus,ledge 76 a moves in to lateral alignment withledge 74 a oflatch 74 thereby preventingclamp lever 62 from being opened until firinglever 65 is once again moved to the proximal-most position. The instrument is thereby prevented from opening during the firing stroke. - Upon initial distal movement, firing
lever 65 becomes locked-ut from pivotal movement by way of firinglever 65 being cammed downwardly to overcome an upward spring bias, as shown in the operationally progressive views ofFIGS. 25 and 29 . In particular, as best shown inFIG. 30 , recessednotches slide block 78, respectively depending upon whichside firing lever 65 is rotated to during firing. Firinglever 65 can be returned to the proximal-most position at any time during the firing stroke. Firinglever 65 must be returned to the proximal-most position before the levers can be released and the instrument unclamped. As described previously, if the instrument is opened after firing either partially or completely,safety lockout 28 onSULU 16 is configured to prevent the user from re-clamping the instrument. - Turning now to
FIGS. 31-51 , an alternative embodiment of a disposable staple cartridge assembly is generally shown as 116.Staple cartridge assembly 116 includes acartridge body 118, a plurality ofstaple pusher members 120, abottom cover 122, aknife 124 having an angled sharpenedleading edge 124 a, a plurality ofstaples 126, a pivotably mountedsafety lockout 128 and aremovable shipping wedge 130. As with known staple cartridge designs,cartridge body 118 has a plurality of rows ofstaple retaining slots 132 formed therein. - Alternatively,
cartridge assembly 116 may be adapted such that one common surgical stapler 100 (seeFIGS. 41 and 42 ) will accept multiple different staplecount cartridge assemblies 116. For example,cartridge assembly 116 may be configured such that each different staplecount cartridge assembly 116 shares a commonsize cartridge body 118 to facilitate mounting onsurgical stapler 100. - In the present illustrated embodiment, there are two staggered rows of
slots 132 formed on either side of a linear slottedtrack 134 which guidesknife 124 during its longitudinal movement. Asingle staple 126 is positioned in each ofslots 132. The staple rows preferably extend a distance distally beyond the distal end ofknife track 134 to facilitate staple formation beyond the stroke length ofknife 124. Staple-pushers 120 are formed such that they are attached to each other in groups of two offset oriented pusher pairs. - The pusher pairs are arranged in two series, one on each side of slotted
track 134, such that the actuating surfaces of each series of pusher pairs forms a line centered between the staggered row ofstaples 126. The actuating surfaces act as cam followers and interact with a pair of staggered camming surfaces 136 and 138 (seeFIGS. 34-36 ) extending from a pair of cam bars 140 to expel the pairs ofstaples 126 on each side of theknife track 134. As illustrated, camming surfaces 136 and 138 form a single angle relative to horizontal. As eachcam bar 140 is moved distally this sequence is repeated until the distal movement of eachcam bar 140 is either stopped intentionally by the user to form less than all ofstaples 126 or until all ofstaples 126 are expelled fromcartridge assembly 116. -
Bottom cover 122 partially encloses the bottom of a channel formed by the upper surface and side walls ofcartridge body 118. Alongitudinal ridge 122 a is formed on the upper surface ofbottom cover 122 and serves as a bearing surface forknife bearing channel 142, secured to the bottom edge ofknife 124, asknife 124 travels inknife track 134. A pair of slots are formed one on either side oflongitudinal ridge 122 a. The outer limit of each slot being defined by the outer wall ofcartridge body 118 on the respective side ofridge 122 a. These slots facilitate reciprocating longitudinal movement of thecamming surface extensions cam bar 140.Knife bearing channel 142 which is wider thanknife track 134, is secured to the bottom surface of the knife such that knife bearingchannel member 142 rides between-knife track 134 andlongitudinal ridge 122 a ofbottom cover 122. In this manner,knife 124 is prevented from undergoing substantial vertical movement during longitudinal translation inknife track 134. -
Safety lockout 128 is pivotably disposed on the upper proximal end ofcartridge body 118 and is movable from a locked orientation to an unlocked orientation. Preferably,safety lockout 128 is biased away from the locked orientation towards an orientation substantially perpendicular to the longitudinal axis ofcartridge body 118. Any suitable bias member may be utilized such as, for example,spring 144. To overcome the bias towards the perpendicular orientation,safety lockout 128 includes a transversehorizontal surface 128 a (seeFIG. 45 ) formed on the underside thereof which engages ahook 124 b formed on the upper edge surface ofknife 124. This cooperative engagement serves to retainsafety lockout 128 in the locked orientation whensafety lockout 128 coversknife 124. - When
surgical stapler 100 has been unclamped, as will be described in greater detail further herein, after either partial or complete firing,safety lockout 128 is biased to the perpendicular orientation (seeFIG. 50 ), extending upwardly away from cartridge half-section 112. In this manner,surgical stapler 100 cannot be re-clamped until the partial or completely firedcartridge assembly 116 is removed and replaced with anew cartridge assembly 116.Safety lockout 128 also provides a cut-out grasping surface 128 b with whichcartridge assembly 116 may readily be removed fromsurgical stapler 100. - As previously noted,
shipping wedge 130 is removably attachable tocartridge body 118. When installed oncartridge assembly 116,shipping wedge 130 covers the entire surface area of thestaple rows 126 andknife track 134.Shipping wedge 130 includes apost 130 b extending downwardly from the underside near the proximal end thereof.Post 130 b fits into a complementary shapedopening 118 c formed incartridge body 118 at the proximal end ofknife track 134. Withshipping wedge 130 in place, post 130 b blocks potential distal movement ofknife 126.Post 130 b maintainsknife 134 retained withinsafety lockout 128 thereby ensuring that the sharpeneddistal edge 124 a ofknife 124 is covered. Once again,cartridge assembly 116 may be provided without a knife in applications where it is desirable to perform stapling without transection. In such an embodiment,knife 126 is replaced with a blank element to substitute for the knife to interact withsafety lockout 128. -
Cartridge body 118 includes a series of finger grips 127 formed along the upper sides of thebody 118 near a proximal end thereof. The finger grips 127 assist the user in gripping thecartridge assembly 116 for both installation and removal of thecartridge assembly 116 from the cartridge half-section 112.Cartridge body 118 also includes a pair ofresilient friction fingers 129 disposed on either side near a proximal end thereof.Friction fingers 129 are configured and adapted to project outwardly from thecartridge body 118 and to frictionally engage the inner surface of the cartridge half-section 112. In this manner, thefriction fingers 129 prevent thecartridge assembly 116 from falling out of the cartridge half-section 112. - Referring to
FIGS. 35-40 , a loading and lockout mechanism forcartridge assembly 116 will now be described in detail. The loading and lockout mechanism facilitates loading ofcartridge assembly 116 and prevents firing ofsurgical stapler 100 untilcartridge assembly 116 is properly loaded on cartridge half-section 112 andsurgical stapler 100 is properly clamped shut. The loading and lockout mechanism includes arocker 152 which is pivotably mounted to achannel frame 112 a (seeFIG. 43 ) of cartridge half-section 112 by way of transversely extendingpost portions 152 a seating in openings formed through the sidewalls ofchannel frame 112 aPost portions 152 a are provided with angled downwardly oriented surfaces to facilitate assembly ofrocker 152 withchannel frame 112 a.Rocker 152 is preferably a molded plastic component and is provided with three slots, namely an open bottomedslots cam bar channel 140 and aclosed slot 152 d to permit passage of acenter bar 154. - As best shown in
FIGS. 37 and 39 ,rocker 152 is further provided with a downwardly extendingblocking surface 152 e which is in vertical alignment with anopening 140 a formed through the bottom surface of eachcam bar 140 when eachcam bar 140 is in its proximal-most position.Rocker 152 is biased, by way of aspring 156 which is disposed on transversely extendingpost portion 152 a and between aridge 152 f formed on a side of therocker 152 and upper surface of the cartridge half section 112 (seeFIG. 35 ), toward a locked-out position wherein blockingsurface 152 e extends through opening 140 a In this manner, eachcam bar 140 is prevented from distal longitudinal movement. - Upon loading
cartridge assembly 116 on cartridge half-section 112 as shown inFIGS. 37-40 and, the spring bias maintainsrocker 152 in the locked-out position. It is only when anvil half-section 114 is joined with cartridge half-section 112 and the half-sections clamped together thereby causing downwardly extendingleg portions 160 a formed on either side of anvil half-section channel member 160 to bias againstcartridge assembly 116, thatrocker 152 is urged to rotate by the camming action of proximal end surface ofcartridge assembly 116 against the distal end surface ofrocker 152. In this manner, blockingsurface 152 e is moved out of longitudinal alignment with opening 140 a of eachcam bar 140 thereby permitting distal longitudinal movement thereof. - Similar to the first embodiment, once
surgical stapler 100 has been at least partially fired, if the instrument is opened,safety lockout 128 ofcartridge assembly 116 automatically moves to the perpendicular orientation due to the spring bias mounting thereof. In this orientation,surgical stapler 100 cannot be re-clamped. Thus, if the user desires to apply further staples, fired or partially firedcartridge assemblies 116 must first be removed and replaced with anon-fired cartridge assembly 116. - Referring to
FIGS. 41 and 42 ,surgical stapler 100 is provided with dual selectable clamping levers 162 and 164 and a pivotably mountedfiring lever 165. Like clampinglevers levers surgical stapler 100 from either half-section lever 165 provides the user with the ability to firesurgical stapler 100 from either the left or right side. - Clamping
levers section 112 and anvil half-section 114, respectively. Clampinglevers section 114, as seen inFIG. 41 , the cartridge half-section 112, as seen inFIG. 42 , or simultaneously from both the cartridge half-section 112 and the anvil half-section 114, as seen inFIG. 51 . A pair of ergonomic contoured handles 166 and 168 are secured to clampinglevers surgical stapler 100 by the user, a pair offriction enhancing inserts handles - Unlike the first embodiment, the
surgical stapler 100 according to the alternative embodiment does not have a safety interlock mechanism. In this manner, the user can open thesurgical stapler 100 after a complete or partial firing of thecartridge assembly 116. Referring now toFIGS. 43-49 , a clamp latch mechanism, according to the alternative embodiment, is provided at the proximal end ofsurgical stapler 100 which serves to retainclamp levers half section section 112. - As shown in
FIG. 43 , the clamp latch mechanism includes a distalclamp lever latch 174 formed at a proximal end of the cartridge half-section 112 and latchhandle release member 180 operatively coupled to a proximal end ofclamp lever 162. Latchhandle release member 180 is spring biased proximally toward a latched position and is provided with acatch 132 or engagingclamp lever latch 174. In order to releaseclamp lever 162, the user pressesrelease member 180 in the distal direction, thereby disengagingcatch 182 fromlatch 174. - In order to prevent inadvertent opening of the
clamp lever 162,release member 180 is provided with aprojection 184 extending downwardly from a proximal end thereof, whichprojection 184 is seated within aguard 186 formed at the proximal end of thelever 162. It is envisioned that theguard 186 can be integral with thehandles guard 186 and thereby depress therelease member 180. - Further, as seen in
FIG. 43 ,surgical stapler 100 is provided with a firinglever slide block 188.Slide block 188 includes ahub 190 projecting therefrom and configured and adapted to be received in apivot hole 192 formed in firinglever 165.Slide block 188 is configured and adapted to be slidably received in either the cartridge half-section 112 or the anvil half-section 114. In use, the firinglever 165 is pivotable abouthub 190 thereby providing the user with the ability to manipulate thefiring lever 165 from either side of thesurgical stapler 100. - As seen in
FIGS. 41-43 and 50,surgical stapler 100 is provided with a staplegap adjustment mechanism 200 which enables eachstapler 100 to be manufactured and assembled with a very precise staple gap between the cartridge assembly and the anvil structure of the surgical stapler. The staplegap adjustment mechanism 200 is the subject of commonly owned and co-pending U.S. provisional patent application, Ser. No. ______, filed on Oct. 5, 2001, entitled “Surgical Stapling Apparatus”, attorney docket number 203-3067, the entire contents of which are incorporated herein by reference. According to the present embodiment,gap adjustment mechanism 200 includes a pair ofupstanding hinge plates 202 formed along the sides of the cartridge half-section 112 and aneccentric cam 206. Eachhinge plate 202 is provided with a coaxial throughhole 204 formed therein and is configured and adapted to receive theeccentric cam 206 therein. In use, as theeccentric cam 206 is rotated, theeccentric cam 206 presses against the anvil half-section 114 until the desired staple gap between the anvil half-section 114 and thecartridge half section 112 is achieved. At which point theeccentric cam 206 is fixedly secured in the throughholes 204. - It will be understood that various modifications may be made to the embodiments of the surgical fastener applying apparatus disclosed herein. Therefore, the above description should not be construed as limiting, but merely as exemplifications of preferred embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the present disclosure.
Claims (16)
1-8. (canceled)
9. A surgical fastener applying apparatus, comprising:
a cartridge half-section and an anvil half-section, the cartridge half-section and anvil half-section being relatively movable from an unclamped position to a clamped position; and
a loading unit receivable in the cartridge half-section and having a plurality of staples and a plurality of staple pusher members;
the cartridge half-section having:
a frame;
a member being longitudinally movable through the loading unit to interact with the plurality of staple pusher members to fire the staples; and
a lockout mechanism arranged to block advancement of the member in a locked-out position of the lockout mechanism;
whereupon both loading of the loading unit in the surgical fastener applying apparatus and clamping of the cartridge and anvil half-sections moves the lockout mechanism to an unlocked position to allow advancement of the member.
10. The surgical fastener applying apparatus of claim 9 , wherein the member is a cam bar slidably coupled to said cartridge half-section, wherein said cam bar includes a pair of camming surface extensions for interacting with the staple pusher members to fire the staples.
11. The surgical fastener applying apparatus of claim 10 , wherein the lockout mechanism includes a rocker pivotably mounted to said cartridge half-section, said rocker including a downwardly extending blocking surface and being biased toward a locked-out position, wherein said blocking surface engages said member to prevent a longitudinal movement of said cam bar arrangement and said camming surface extensions.
12. The surgical fastener applying apparatus of claim 9 , wherein said anvil half-section includes a downwardly extending portion configured and adapted to engage the loading unit, the loading unit urging said lockout mechanism to rotate.
13. A surgical fastener applying apparatus, comprising:
a cartridge half-section and an anvil half-section, the cartridge half-section and anvil half-section being relatively movable from an unclamped position to a clamped position; and
a replaceable staple cartridge assembly selectively receivable in the cartridge half-section, the replaceable staple cartridge assembly including:
a plurality of surgical staples;
a plurality of staple pusher members; and
a lock-out, the lock-out being movable between an initial substantially horizontal position and a vertical blocking position extending between the cartridge and anvil half-sections, wherein the lock-out prevents the cartridge half-section and anvil half-section from returning to the clamped position after the plurality of staples have been at least partially fired.
14. The surgical fastener applying apparatus of claim 13 , wherein the lock-out includes a transverse horizontal surface formed on an underside thereof, the transverse horizontal surface engaging a hook formed on an upper edge surface of a knife thereby retaining said lock-out in said blocking position.
15. The surgical fastener applying apparatus of claim 14 , wherein said lock-out moves to said blocking position upon an unclamping of the cartridge and anvil half-sections after the plurality of staples have been at least partially fired.
16. The surgical fastener applying apparatus of claim 13 , wherein the lock-out is confined between planes defined by opposed lateral side walls of said replaceable staple cartridge assembly when in the initial and blocking positions.
17. A surgical fastener applying apparatus, comprising:
a cartridge half-section and an anvil half-section, the cartridge half-section and anvil half-section being relatively movable from an unclamped position to a clamped position; and
a replaceable staple cartridge assembly selectively receivable in the cartridge half-section, the replaceable staple cartridge assembly including:
a plurality of surgical staples;
a plurality of staple pusher members; and
a lock-out movable between an initial position permitting a relative movement of the cartridge half-section and anvil half-section to said clamped position and a blocking position preventing a relative movement of said cartridge half-section and anvil half-section to said clamped position after said plurality of staples have been at least partially fired, wherein the lock-out is confined between planes defined by opposed lateral side walls of said cartridge half-section when in the initial and blocking positions.
18. The surgical fastener applying apparatus of claim 17 , wherein the lock-out includes a transverse horizontal surface formed on an underside thereof, the transverse horizontal surface engaging a hook formed on an upper edge surface of a knife thereby retaining said lock-out in the blocking position.
19. The surgical fastener applying apparatus of claim 17 , wherein the lock-out moves to the blocking position upon an unclamping of the cartridge and anvil half-sections after the plurality of staples have been at least partially fired.
20. The surgical fastener applying apparatus of claim 17 , wherein the lock-out is confined between planes defined by opposed lateral side walls of said replaceable staple cartridge assembly when in the initial and blocking position.
21. A replaceable staple cartridge assembly for use in a surgical fastener applying apparatus having a cartridge half-section and an anvil half-section, the cartridge half-section and anvil half-section being relatively movable from an unclamped position to a clamped position, wherein the replaceable staple cartridge assembly comprises:
a plurality of surgical staples;
a plurality of staple pusher members; and
a lock-out movable between an initial position permitting a relative movement of the cartridge half-section and anvil half-section to said clamped position and a blocking position preventing a relative movement of said cartridge half-section and anvil half-section to said clamped position after said plurality of staples have been at least partially fired, wherein the lock-out is confined between planes defined by opposed lateral side walls of said replaceable staple cartridge assembly when in the initial and blocking positions.
22. A replaceable staple cartridge assembly for use in a surgical fastener applying apparatus having a cartridge half-section and an anvil half-section, the cartridge half-section and anvil half-section being relatively movable from an unclamped position to a clamped position, wherein the replaceable staple cartridge assembly comprises:
a plurality of surgical staples;
a plurality of staple pusher members; and
a lock-out movable between an initial position permitting a relative movement of the cartridge half-section and anvil half-section to the clamped position and a blocking position preventing a relative movement of the cartridge half-section and anvil half-section to said clamped position after said plurality of staples have been at least partially fired, wherein the lock-out is confined between planes defined by opposed lateral side walls of the cartridge half-section when in the initial and blocking position.
23. The replaceable staple cartridge assembly of claim 22 , wherein the lock-out is interposed between planes defined by opposed lateral side walls of said replaceable staple cartridge assembly when in the initial and blocking positions.
Priority Applications (1)
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US11/356,912 US7293685B2 (en) | 2000-10-13 | 2006-02-16 | Surgical fastener applying apparatus |
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US12/186,269 Expired - Fee Related US7721933B2 (en) | 2000-10-13 | 2008-08-05 | Surgical fastener applying apparatus |
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