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US8181840: Tissue tensioner assembly and approximation mechanism for surgical stapling device

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Filing Information

Inventor(s) Keith L. Milliman ·
Assignee(s) Tyco Healthcare Group LP ·
Primary Examiner Lindsay Low ·
Application Number US11081373
Filing date 03/16/2005
Issue date 05/22/2012
Prior Publication Data
Predicted expiration date 12/14/2029
Patent term adjustment 1734
U.S. Classifications 227/179.1  · 227/19  · 227/175.1  ·
International Classifications A61B17068  · A61B17115  ·
Kind CodeB2
Related U.S. Application DataThis application claims priority from U.S. Provisional Application Ser. No. 60/554,556, filed Mar. 19, 2004, and from U.S. Provisional Application Ser. No. 60/554,562, filed Mar. 19, 2004, the contents of which are incorporated by reference in their entirety.
13 Claims, 32 Drawings


Abstract

A surgical stapling device having an approximation mechanism for treating hollow tissue organs is provided. The stapling device includes a handle, a body portion extending distally from the handle, a distal head portion at a distal end of the body portion, and an approximation mechanism. The head portion includes an anvil assembly having an anvil head and an anvil shaft. The approximation mechanism includes a rotatable approximation knob, a first member, and a second member. The rotatable approximation knob is operably connected to the first member to effect movement the first member over a first distance. The second member is rotatably coupled to a proximal end of the anvil shaft of the anvil assembly to operably connect the anvil shaft to the first member such that movement of the first member over the first distance effects movement of the anvil shaft in relation to the first member over a second distance.

Independent Claims | See all claims (13)

  1. 1. A surgical stapling device comprising: an elongated body portion; a distal head portion including an anvil assembly and a shell assembly supported on the distal end of the elongated body portion, the anvil assembly including an anvil head assembly and an anvil shaft, the shell assembly supporting a plurality of staples, the anvil assembly being movable in relation to the shell assembly between spaced and approximated positions; and an approximation mechanism including a rotatable approximation knob, a drive member, and an extension mechanism, the approximation knob being operably connected to the drive member and being actuable to effect axial movement of the drive member over a first distance; wherein the extension mechanism operably connects the drive member to the anvil shaft such that axial movement of the drive member over the first distance effects axial movement of the anvil shaft over a second distance which is greater than the first distance.

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Other Publications

European Search Report for EP 05 00 5966, date of Mailing Aug. 19, 2005 (3 pgs).
European Search Report for EP 05 00 5966, date of Completion of the search Oct. 17, 2005 (6 pgs).

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8308044 Tyco Healthcare Group LP Frank J. Viola Nov 2012
US8662371 --
US8678264 --

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