Circular stapler

• US 9,155,536 B1
• Filed: 04/26/2011
• Issued: 10/13/2015
• Est. Priority Date: 04/26/2011
• Status: Active Grant

• Current Assignee: Aesculap AG (B. Braun Holding GmbH & Co. KG)
• Original Assignee: Cardica Incorporated
• Inventors: Hausen, Bernard A., Knodel, Bryan D.
• Primary Examiner(s): Long, Robert
• Application Number:
  US13/094,814
• Time in Patent Office: 1,631 Days
• Field of Search: 2271751-1821
• US Class Current: 1/1
• CPC Class Codes: A61B 17/0644 penetrating the tissue, deformable to closed position
• 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 17/1155 Circular staplers comprising a plurality of staples
• CPC Class Codes: A61B 2017/07221 curved
• CPC Class Codes: A61B 2017/07285 characterised by its cutter
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter

Abstract

An exemplary circular stapler may include an anvil; a staple holder connected to the anvil; and a feeder belt ring held within the staple holder, the feeder belt ring including staples frangibly affixed thereto. An exemplary surgical method for treating tissue may include possessing an anvil, a staple holder connected to the anvil, and a feeder belt ring held within the staple holder, the feeder belt ring including a plurality of staples frangibly affixed thereto; clamping tissue between the anvil and staple holder; and sequentially deforming and then breaking from the feeder belt ring at least two staples.

Claims

1. A circular stapler, comprising:

an anvil;

a staple holder connected to said anvil; and

a feeder belt ring held within said staple holder, said feeder belt ring including a plurality of staples frangibly affixed thereto, the staple holder configured to hold the plurality of staples about a longitudinal axis of a shaft coupled to the anvil, each of the plurality of staples extending parallel to the longitudinal axis.

2. The surgical apparatus of claim 1, wherein said feeder belt ring defines a circular aperture at the center thereof.

3. The surgical apparatus of claim 1, further comprising a wedge ring rotatable relative to said feeder belt ring, and a wedge connected to said wedge ring, wherein rotation of said wedge ring and said wedge deploys and then breaks off at least one said staple from said feeder belt ring.

4. The surgical apparatus of claim 3, wherein said wedge is an active wedge.

5. The surgical apparatus of claim 3, wherein said rotation is substantially 360 degrees.

6. The surgical apparatus of claim 1, wherein at least two separate rows of said staples extend from said feeder belt ring.

7. The circular stapler of claim 1, further comprising a wedge configured to separate each of the plurality of staples from the feeder belt ring.

8. The circular stapler of claim 1, further comprising a wedge ring and a wedge, the wedge ring configured to pull the wedge along a circular path defined by the wedge ring, so as to deploy the plurality of staples.

9. The circular stapler of claim 1, a wedge ring coupled to a wedge, the wedge ring defining a circle concentric with the feeder belt ring.

10. A surgical stapler, comprising:

an anvil;

a staple holder coupled to said anvil, the staple holder configured to hold a plurality of staples in a ring formation about a longitudinal axis of a shaft coupled to the anvil, each of the plurality of staples extending parallel to the axis; and

a wedge movably coupled to the staple holder so that the wedge rotates around the longitudinal axis to deploy the plurality of staples in a sequential manner around the longitudinal axis.

11. The surgical stapler of claim 10, further comprising a wedge ring coupled to the wedge, the wedge ring centered on the axis.

12. The surgical stapler of claim 10, wherein the wedge is configured to separate each of the plurality of staples from the staple holder.

13. The surgical stapler of claim 10, further comprising a feeder belt ring having the plurality of staples frangibly attached thereto.

14. The surgical stapler of claim 10, wherein the wedge is positioned at a predetermined radius from the axis and is configured to travel about the axis at the predetermined radius.

15. The surgical stapler of claim 10, further comprising a wedge ring, with the wedge coupled to the wedge ring, wherein the wedge ring rotates about the axis.

16. A surgical apparatus, comprising:

a shaft, having a longitudinal axis;

an anvil coupled to the shaft;

a staple holder coupled to the shaft, the staple holder configured to hold a plurality of staples in a feeder belt ring about the longitudinal axis, each of the plurality of staples extending parallel to the longitudinal axis; and

a wedge movably coupled to the shaft so that the wedge circulates about the longitudinal axis to detach the plurality of staples from the feeder belt ring in a sequential manner around the longitudinal axis.

17. The surgical apparatus of claim 16, further comprising a wedge ring coupled to the wedge, wherein the wedge ring includes one of:

a complete ring;

or an arcuate section of a ring.

18. The surgical apparatus of claim 16, wherein the wedge includes a plurality of wedges.

19. The surgical apparatus of claim 16, wherein the wedge controls formation and separation of each of the plurality of staples.

20. The surgical apparatus of claim 16, further comprising a wedge ring coupled to the wedge, wherein the wedge includes a plurality of wedges and wherein rotation of the wedge ring about the axis by less than or equal to 180 degrees deploys and breaks off all of the plurality of staples.