Multiple fire endoscopic stapling mechanism

• US 5,246,156 A
• Filed: 09/12/1991
• Issued: 09/21/1993
• Est. Priority Date: 09/12/1991
• Status: Expired due to Term

• Current Assignee: Ethicon Incorporated (Johnson & Johnson)
• Original Assignee: Ethicon Incorporated (Johnson & Johnson)
• Inventors: Bedi, James J., Privitera, Salvatore, Bishop, Gregory D., Okorocha, Livyn O., Sherrill, Michael, Sambi, Narinderjit S., Rothfuss, Robert G.
• Primary Examiner(s): Yost, Frank T.
• Assistant Examiner(s): RADA, RINALDI I
• Application Number:
  US07/759,014
• Time in Patent Office: 740 Days
• Field of Search: 227/19, 227/176, 227/177
• US Class Current: 227/176.1
• CPC Class Codes: A61B 17/0644 penetrating the tissue, deformable to closed position
• CPC Class Codes: A61B 17/0684 having a forming anvil staying above the tissue during stapling
• CPC Class Codes: A61B 17/105 Wound clamp magazines for packaging sharps A61B50/3001

Abstract

A unique hernia repair stapler is described which allows the forming of staples to attach prosthetics to tissue, or to approximate herniated tissue. The staple is useful in endoscopic operations and may be rotatable or stationary. The stapler has a unique forming and ejecting mechanism; as well, there is the availability of a loading mechanism useful for both cartridges and magazines of staples. An improved staple shape allows for better staple alignment, especially in a multiple load device.

Claims

1. A stapling mechanism comprising:

a firing mechanism capable of moving along a longitudinal path defining a longitudinal axis;

a staple closing mechanism attached to said firing mechanism, said closing mechanism capable of closing staples;

a cartridge attached to said firing mechanism and said cartridge placed along said longitudinal axis and containing said firing mechanism; and

said cartridge containing a stack of staples arranged from a distalmost staple closest said staple closing mechanism to a proximal staple, each of said staples comprising a crown with a tissue facing distal side and a proximal side, and having two ends;

each said crown end having a notch, said notch comprising an indentation in said crown toward said distal side and away form said proximal side; and

a pair of legs, each leg attached to said notch and extending therefrom, and each leg having a sharpened distal end and said staples arranged such that each of said staples lie along said axis with the leg distal ends of a proximal staple contacting the corresponding crown notches of an adjacent distal staple; and

a transfer mechanism engageable with said firing mechanism and capable of transferring a staple from said staple stack and into said path, and comprising a lifter positioned in said cartridge and moveable transverse to said longitudinal axis, said lifter having a sloped surface, and the distalmost staple in said stack engageable with said sloped surface to move from said stack and into said path; and

wherein

said cartridge is circular and is capable of being placed in a trocar tube 10 mm in diameter.

2. The stapler of claim 1 wherein said staple stack is contained in a track formed within said cartridge and said staples are constrained in said stack by a planar face on said lifter, and said cartridge further including a driver formed as part of said firing mechanism and engageable with the forwardmost staple on said stack engaged with said planar face on said lifter, such that said driver is capable of stripping said staple from said lifter, moving said stale along said sloped surface, and positioning said staple into the path of said firing mechanism.

3. The staple of claim 2 further including a stop means on said lifter, said stop means engageable with said driver when there are no longer any staples loaded in said cartridge.

4. The stapling mechanism of claim 1 further defined as an endoscopic stapling mechanism, containing an endoscopic portion, said endoscopic portion containing said cartridge, said firing mechanism and said transfer mechanism;

and said stapling mechanism containing an actuating mechanism attached to said firing mechanism.

5. The stapler of claim 4 wherein said cartridge is rotatable about said longitudinal axis.

6. The stapler of claim 5 wherein said actuating mechanism is a trigger.

7. An endoscopic cartridge comprising:

a firing mechanism capable of moving along a longitudinal path and defining a longitudinal axis and containing a driver and an anvil;

a stack of staples placed along said longitudinal axis;

a transfer mechanism engageable with said firing mechanism and capable of transferring a staple from said staple stack and into said path, and comprising a lifter positioned in said cartridge and moveable transverse to said longitudinal axis, said lifter having a sloped surface, and the distalmost staple in said stack engageable with said sloped surface to move from said stack and into said path; and

wherein

said cartridge is circular and is capable of being placed in a trocar tube 10 mm in diameter.

8. The cartridge of claim 7 further comprising a planar face on said lifter, such that said driver is engageable with the forwardmost staple on said stack engaged with said planar face on said lifter, such that said driver is capable of stripping said staple from said lifter, moving said staple along said sloped surface, and positioning said staple on said anvil for forming.

9. The cartridge of claim 8 further including a stop means on said lifter, said stop means engageable with said driver when there are no longer any staples loaded in said cartridge.

10. A surgical stapler comprising the cartridge of claim 7 and further containing an actuating mechanism attached to said cartridge.

11. The stapler of claim 10 wherein said actuating mechanism is a trigger.

12. The stapler of claim 10 wherein said cartridge is rotatable about said longitudinal axis.

13. The cartridge of claim 7 wherein the staples of said stack are arranged such that each said staple contains a crown with a tissue facing distal side and a proximal side, and having two ends;

each said crown having a notch, said notch comprising an indentation in said crown toward said distal side and away from said proximal side; and

a pair of legs, each leg attached to said notch and extending therefrom, and each leg having a sharpened distal end;

and said staples arranged such that each of said staples lie along said axis with the leg distal ends of a proximal staple contacting the notches of an adjacent distal staple.