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Articulating surgical stapling instrument incorporating a two-piece e-beam firing mechanism

a firing mechanism and surgical stapling technology, applied in the field of surgical instruments, can solve the problems of complicated approaches to articulating surgical stapling and severing instruments, and achieve the effects of reducing cross sectional area and the ability to flex, enhancing use of articulating surgical instruments, and ensuring the accuracy of articulation

Inactive Publication Date: 2011-06-23
CILAG GMBH INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]The invention overcomes the above-noted and other deficiencies of the prior art by providing a firing mechanism that affirmatively vertically spaces an end effector of a surgical stapling and severing instrument. Thus, the instrument structurally assures adequate spacing to achieve proper stapling, even in instances where too little tissue is clamped in the end effector. Integrally forming these features into an E-beam that includes a cutting edge realizes consistent spacing and performance as the E-beam fires through an end effector such as a severing and stapling assembly. Further, proximally attaching a separate, thinned firing bar to the E-beam enhances use in articulating surgical instruments wherein reduced cross sectional area and the ability to flex in a plane of articulation are desirable.
[0013]In one aspect of the invention, a surgical instrument includes a handle portion operable to produce a firing motion that actuates an implement portion. This implement portion has an elongate channel that receives a staple cartridge opposed by a pivotally attached anvil. A firing device includes a distally presented cutting edge longitudinally received between the elongate channel and the anvil, an upper member engageable to the anvil channel, a lower member engaging the channel slot, and a middle member operable to actuate the wedge sled, which is integral to the staple cartridge. The middle member advantageously opposes pinching of the end effector, assuring proper staple formation even when an otherwise too small amount of tissue has been clamped. These spacing and cutting features are advantageously formed into an E-beam while flexibility for articulation is provided by a thinned firing bar attached to the E-beam.

Problems solved by technology

Approaches to articulating a surgical stapling and severing instrument tend to be complicated by integrating control of the articulation along with the control of closing the end effector to clamp tissue and fire the end effector (i.e., stapling and severing) within the small diameter constraints of an endoscopic instrument.

Method used

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  • Articulating surgical stapling instrument incorporating a two-piece e-beam firing mechanism
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  • Articulating surgical stapling instrument incorporating a two-piece e-beam firing mechanism

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Embodiment Construction

[0034]In FIGS. 1-3, a surgical stapling instrument 10 has at its distal end an end effector, depicted as a staple applying assembly 12, spaced apart from a handle 14 (FIG. 2) by an elongate shaft 16. The staple applying assembly 12 includes a staple channel 18 for receiving a replaceable staple cartridge 20. Pivotally attached to the staple channel 18 is an anvil 22 that clamps tissue to the staple cartridge 20 and serves to deform staples 23 (FIG. 3) driven up from staple holes 24 in the staple cartridge 20 against staple forming recesses 26 (FIG. 6) in an anvil undersurface 28 into a closed shape. When the staple applying assembly 12 is closed, its cross sectional area, as well as the elongate shaft 16 are suitable for insertion through a small surgical opening, such as through a cannula of a trocar (not shown).

[0035]With particular reference to FIG. 1, correct placement and orientation of the staple applying assembly 12 is facilitated by controls on the handle 14. In particular, ...

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Abstract

A surgical severing and stapling instrument, suitable for laparoscopic and endoscopic clinical procedures, clamps tissue within an end effector of an elongate channel pivotally opposed by an anvil. An E-beam firing bar moves distally through the clamped end effector to sever tissue and to drive staples on each side of the cut. The E-beam firing bar affirmatively spaces the anvil from the elongate channel to assure properly formed closed staples, especially when an amount of tissue is clamped that is inadequate to space the end effector. In particular, an upper pin of the firing bar longitudinally moves through an anvil slot and a channel slot is captured between a lower cap and a middle pin of the firing bar to assure a minimum spacing. Forming the E-beam from a thickened distal portion and a thinned proximal strip enhances manufacturability and facilitates use in such articulating surgical instruments.

Description

[0001]The present application is a continuation of and claims the benefit from U.S. patent application Ser. No. 11 / 538,154, filed Oct. 3, 2006, entitled “ARTICULATING SURGICAL STAPLING INSTRUMENT INCORPORATING A TWO-PIECE FIRING MECHANISM”, to Shelton, IV et al. which claims the benefit of the U.S. provisional patent application entitled “SURGICAL INSTRUMENT INCORPORATING AN ELECTRICALLY ACTUATED ARTICULATION MECHANISM”, to Shelton, Ser. No. 60 / 591,694, filed on 28 Jul. 2004 and which is a continuation-in-part patent application of the U.S. nonprovisional patent application entitled “SURGICAL STAPLING INSTRUMENT INCORPORATING AN E-BEAM FIRING MECHANISM” to Shelton et al., Ser. No. 10 / 443,617, filed on 20 May 2003, the disclosures of which are each hereby incorporated by reference in their respective entireties.FIELD OF THE INVENTION[0002]The present invention relates in general to surgical instruments that are suitable for endoscopically inserting an end effector that is actuated by...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/068A61B17/072
CPCA61B17/07207A61B2017/320052A61B2017/2927A61B17/072A61B17/320092A61B34/30A61B34/37A61B50/20A61B50/36A61B2017/00017A61B2017/00398A61B2017/00473A61B2017/00734A61B2017/0688A61B2017/07271A61B2017/07278A61B2017/2923A61B18/1445A61B2017/07285A61B2018/00607A61B2018/0063A61B2018/1455A61B2090/0807A61B2017/320093A61B17/04A61B17/115A61B17/122A61B2034/302A61B2017/320094A61B2017/320095A61B2017/320097A61B17/064A61B17/068A61B17/0682A61B17/105A61B2017/07257
Inventor SHELTON, IV, FREDERICK E.SETSER, MICHAEL E.WEISENBURGH, II, WILLIAM B.
Owner CILAG GMBH INT
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