Anvil-mounted dissecting tip for surgical stapling device

• US 8,496,153 B2
• Filed: 03/29/2007
• Issued: 07/30/2013
• Est. Priority Date: 03/29/2007
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Demmy, Todd, Olson, Lee Ann
• Primary Examiner(s): Lopez, Michelle
• Application Number:
  US11/729,686
• Publication Number:
  US 20080237297A1
• Time in Patent Office: 2,315 Days
• Field of Search: 227/176.1, 227/180.1, 227/19, 227/175.1
• US Class Current: 227/176.1
• 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 17/072 for applying a row of staples in a single action , e.g. the staples being applied simultaneously
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 2017/07214 Stapler heads
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2929 with a head rotatable about the longitudinal axis of the shaft
• CPC Class Codes: A61B 2017/320044 Blunt dissectors

Abstract

A surgical stapling device including a handle assembly, an endoscopic portion and an end effector is disclosed. The endoscopic portion extends distally from the handle assembly and defines a first longitudinal axis. The end effector defines a second longitudinal axis and includes an anvil assembly and a cartridge assembly. The anvil assembly is supported adjacent a distal end of the endoscopic portion and includes a dissecting tip extending therefrom. The cartridge assembly is pivotably mounted adjacent the distal end of the endoscopic portion. The cartridge assembly is mounted for pivotal movement in relation to the anvil assembly between open and approximated positions.

Claims

1. A surgical stapling device, comprising:

a handle assembly;

an endoscopic portion extending distally from the handle assembly and defining a first longitudinal axis; and

an end effector defining a second longitudinal axis, the end effector including;

an anvil assembly supported adjacent a distal end of the endoscopic portion and including a dissecting tip having an inner surface extending therefrom;

a cartridge assembly pivotally mounted adjacent the distal end of the endoscopic portion and being mounted for pivotal movement in relation to the anvil assembly between open and approximated positions, wherein the anvil assembly is fixed from movement with respect to the cartridge assembly, and wherein a distal-most end of the dissecting tip extends distally beyond a distal-most end of the cartridge assembly, the inner surface of the dissecting tip extending toward the cartridge assembly.

2. The surgical stapling device of claim 1, wherein at least a portion of the dissecting tip is substantially aligned with the first longitudinal axis when the cartridge assembly is in the open position.

3. The surgical stapling device of claim 1, wherein the dissecting tip is fixed from movement with respect to the cartridge assembly when the cartridge assembly is in the open position.

4. The surgical stapling device of claim 1, wherein the end effector is movable from a first position in which the second longitudinal axis is substantially aligned with the first longitudinal axis to at least a second position in which the second longitudinal axis is disposed at an angle to the first longitudinal axis.

5. The surgical stapling device of claim 1, wherein the dissecting tip tapers from a first width at a proximal portion to a second width at a distal portion and wherein the first width is wider than the second width.

6. The surgical stapling device of claim 1, wherein the dissecting tip is configured to puncture tissue.

7. The surgical stapling device of claim 1, wherein the cartridge assembly includes a camming surface thereon.

8. The surgical stapling device of claim 1, wherein a proximal portion of the dissecting tip is integral with a portion of the anvil assembly.

9. The surgical stapling device of claim 1, wherein a proximal portion of the dissecting tip is affixed to a portion of the anvil assembly.

10. The surgical stapling device of claim 1, wherein an inner facing surface of the dissecting tip is substantially parallel to a portion of the cartridge assembly.

11. The surgical stapling device of claim 1, wherein an inner facing surface of the dissecting tip is angled distally downward towards the cartridge assembly.

12. A disposable loading unit for use with an endoscopic surgical stapling device, the disposable loading unit comprising:

a proximal body portion configured for attachment to a portion of the surgical stapling device, the proximal body portion defining a first longitudinal axis; and

an end effector attached to a distal portion of proximal body portion, the end effector defining a second longitudinal axis and the end effector including;

an anvil assembly including a dissecting tip, an inner facing surface of the dissecting tip being angled distally downward towards the cartridge assembly; and

a cartridge assembly mounted for movement with respect to the anvil assembly between an open position and an approximated position, wherein the anvil assembly is fixed from movement with respect to the cartridge assembly.

13. The disposable loading unit of claim 12, wherein the end effector is pivotably attached to the proximal body portion.

14. The disposable loading unit of claim 12, wherein at least a portion of the dissecting tip is substantially aligned with the first longitudinal axis when the cartridge assembly is in the open position.

15. The disposable loading unit of claim 12, wherein the dissecting tip is fixed from movement with respect to the cartridge assembly when the cartridge assembly is in the open position.

16. The disposable loading unit of claim 12, wherein the end effector is movable from a first position in which the second longitudinal axis is substantially aligned with the first longitudinal axis to at least a second position in which the second longitudinal axis is disposed at an angle to the first longitudinal axis.

17. The disposable loading unit of claim 12, wherein the cartridge assembly includes a camming surface thereon.

18. The disposable loading unit of claim 12, wherein a proximal portion of the dissecting tip is affixed to a portion of the anvil assembly.

19. The disposable loading unit of claim 12, wherein the inner facing surface of the dissecting tip is substantially parallel to a portion of the cartridge assembly.

20. The disposable loading unit of claim 12, wherein a distal-most end of the dissecting tip extends distally beyond a distal-most end of the cartridge assembly.