Raised boss for staple guide

• US 8,011,554 B2
• Filed: 01/06/2009
• Issued: 09/06/2011
• Est. Priority Date: 01/09/2008
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Inventors: Milliman, Keith L.
• Primary Examiner(s): Nash; Brian D
• Application Number:
  US12/348,953
• Publication Number:
  US 20090173767A1
• Time in Patent Office: 973 Days
• Field of Search: 227/179.1, 227/19, 227/175.1
• US Class Current: 227/179.1
• 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 2017/07257 characterised by its anvil

Abstract

A surgical stapling device including a handle assembly, a body portion, and a head portion is disclosed. The handle assembly includes a firing trigger. The body portion extends distally from the handle assembly. The head portion includes an anvil assembly and a shell assembly. The anvil assembly is movable in relation to the shell assembly between spaced and approximated positions. The shell assembly includes a pusher and an inner guide portion. The pusher includes at least one slot therein and is movable in relation to the anvil assembly between retracted and extended positions. The inner guide portion is disposed adjacent at least a portion of the pusher and includes a raised boss extending therefrom. The raised boss is configured to shroud the slot in the pusher when the pusher is in the retracted position.

Claims

1. A surgical stapling device comprising:

a handle assembly including a firing trigger;

a body portion extending distally from the handle assembly;

a head portion including an anvil assembly and a shell assembly, the anvil assembly being movable in relation to the shell assembly between spaced and approximated positions, the shell assembly including;

a pusher including at least one slot therein, the pusher being movable in relation to the anvil assembly between retracted and extended positions; and

an inner guide portion disposed adjacent at least a portion of the pusher, the inner guide portion including a raised boss extending therefrom and being affixed thereto, the raised boss being configured to shroud the at least one slot in the pusher when the pusher is in the retracted position, wherein a proximal portion of the raised boss is tapered and wherein a distal portion of the raised boss is not tapered.

2. The surgical stapling device of claim 1, wherein a distal end of the raised boss is substantially aligned in a longitudinal direction with a distal end of the pusher when the pusher is in the retracted position.

3. The surgical stapling device of claim 2, wherein the raised boss is integrally formed with the inner guide portion.

4. The surgical stapling device of claim 3, further including a tapered portion disposed on the inner guide portion.

5. The surgical stapling device of claim 1, wherein the raised boss is integrally formed with the inner guide portion.

6. The surgical stapling device of claim 1, further including a tapered portion disposed on the inner guide portion.

7. The surgical stapling device of claim 1, further including an approximation mechanism including an anvil retainer for supporting the anvil assembly.

8. The surgical stapling device of claim 1, further including an indicator positioned on the handle assembly, the indicator being movable from a first position to a second position in response to movement of at least one of the anvil assembly and cartridge assembly to the approximated position to provide a visual indication to a surgeon that the head portion is in the approximated position.

9. The surgical stapling device of claim 1, further including a lens positioned to at least partially cover the indicator, the lens being formed from a magnification material.

10. A surgical stapling device according to claim 1 , further including an approximation mechanism positioned at least partially within the handle assembly and extending at least partially through the body portion, the approximation mechanism having a distal end adapted to engage the anvil assembly, the approximation mechanism being movable within the device to move the anvil assembly between the spaced position and the approximated position in relation to the shell assembly.

11. The surgical stapling device of claim 10, further including an indicator positioned on the handle assembly. the indicator being movable from a first position to a second position in response to movement of at least one of the anvil assembly and cartridge assembly to the approximated position to provide a visual indication to a surgeon that the head portion is in the approximated position, wherein the approximation mechanism is operably associated with the indicator such that movement of the approximation mechanism effects movement of the indicator.

12. A surgical stapling device according to claim 1, wherein the shell assembly is configured to support an annular array of staples.

13. A surgical stapling device according to claim 1, wherein the raised boss is ring-like.

14. A surgical stapling device according to claim 1, wherein the raised boss extends distally from a distal-most end of the inner guide portion.

15. A surgical stapling device according to claim 1, wherein the raised boss includes a tissue-contacting surface.