Surgical stapling device

• US 8,181,838 B2
• Filed: 08/31/2009
• Issued: 05/22/2012
• Est. Priority Date: 09/10/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Milliman, Keith L., Hessler, Thomas R., Wenchell, Thomas
• Primary Examiner(s): Smith, Scott A.
• Application Number:
  US12/550,443
• Publication Number:
  US 20100089971A1
• Time in Patent Office: 995 Days
• Field of Search: 227/19, 227/176.1, 227/175.1, 227/180.1, 227/178.1
• US Class Current: 227/175.1
• CPC Class Codes: A61B 1/31 for the rectum, e.g. proctoscopes, sigmoidoscopes , colonoscopes
• CPC Class Codes: A61B 17/0482 Needle or suture guides guides for drills, pins or wire A61B17/17; for puncturing needles A61B17/3403
• CPC Class Codes: A61B 17/06166 Sutures suture materials A61L17/00; manufacture of artificial threads D01D; treatment of threads D06M
• CPC Class Codes: A61B 17/068 Surgical staplers , e.g. containing multiple staples or clampsstaplers containing only one staple A61B17/10; magazines or containers for staples A61B17/105; for performing anastomosis A61B17/115; staplers in general B25C5/00
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/115 Staplers for performing anastomosis in a single operation
• CPC Class Codes: A61B 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/07257 characterised by its anvil
• CPC Class Codes: A61B 2017/1142 Purse-string sutures
• CPC Class Codes: A61B 2018/005 Rectum
• CPC Class Codes: A61B 2090/062 penetration depth
• CPC Class Codes: A61B 2090/08021 of the patient or his organs
• CPC Class Codes: A61B 2090/0811 for the position of a particular part of an instrument with respect to the rest of the instrument, e.g. position of the anvil of a stapling instrument
• CPC Class Codes: A61B 34/76 Manipulators having means for providing feel, e.g. force or tactile feedback

Abstract

A surgical stapling device an elongated body portion having proximal and distal portions, and a head portion positioned adjacent the distal portion of the elongated body portion. The head portion includes a shell assembly and an anvil assembly movable relative to the shell assembly between un-approximated and approximated positions. The anvil assembly includes a center rod and an anvil head connected to the center rod. The center rod includes at least one aperture extending transversely therethrough and configured and dimensioned to receive a flexible member such that the flexible member extends transversely through the center rod.

Claims

1. A surgical stapling device, including:

an elongated body portion having proximal and distal portions; and

a head portion positioned adjacent the distal portion of the body portion, the head portion including a shell assembly and an anvil assembly movable relative to the shell assembly between unapproximated and approximated positions, the anvil assembly including an anvil head and a center rod extending from the anvil head, the center rod including a first annular engagement member and a second annular engagement member, and a drive screw with proximal and distal ends extending at least partially through the body portion, and an anvil retainer being operably connected to the drive screw and configured and dimensioned to at least partially receive the center rod and the first annular engagement member therein, wherein the drive screw moves the anvil assembly between the unapproximated and approximated positions, the first annular engagement member being configured to engage an annular recess of the anvil retainer to attach the center rod to the anvil retainer and the second annular member being configured to frictionally engage the shell assembly to enhance stability of the anvil assembly on the anvil retainer.

2. The surgical stapling device of claim 1, wherein the anvil retainer is secured to the drive screw via a connector including a central body, a first extension extending proximally from the central body, and a second extension extending distally from the central body.

3. The surgical stapling device of claim 2, wherein the first extension is positioned within the distal end of the drive screw and the second extension is positioned within the proximal end of the anvil retainer.

4. The surgical stapling device of claim 3, wherein the first extension and drive screw include corresponding throughbores configured and dimensioned to receive a first pin and the second extension and the anvil retainer include corresponding throughbores configured and dimensioned to receive a second pin to thereby connect the second extension to the anvil retainer.

5. The surgical stapling device of claim 1, wherein the shell assembly includes a boss and the second annular member engages the boss.

6. The anvil assembly of claim 1, wherein the second annular member comprises an interference member.

7. The surgical stapling device of claim 6, wherein the shell assembly includes a boss, and the interference member comprises an annular ring, the annular ring engageable with the boss.

8. The surgical stapling device of claim 1, wherein the center rod includes a plurality of splines for alignment of the center rod with a shell assembly of the surgical stapling device, the splines being positioned between the first and second annular members.

9. An anvil assembly comprising an anvil head and a center rod extending from the anvil head, the center rod including a first annular engagement member and a second annular engagement member spaced distally from the first annular engagement member, the first annular engagement member being configured to engage an annular recess of an anvil retainer of a surgical stapling device to attach the center rod to the anvil retainer and the second annular member being configured to engage a shell assembly of the surgical stapling device to enhance stability of the anvil assembly on the anvil retainer.

10. The anvil assembly of claim 9, further comprising a marker on the center rod.

11. The anvil assembly of claim 9, wherein the center rod extends proximally from the anvil head a distance greater than or equal to three inches.

12. The anvil assembly of claim 9, wherein the center rod includes a plurality of splines for alignment of the center rod with a shell assembly of the surgical stapling device, the splines being positioned between the first and second annular members.

13. The anvil assembly of claim 12, wherein the second annular member engages a boss of the shell assembly.

14. The anvil assembly of claim 9, wherein the second annular member comprises an interference member.