POWERED SURGICAL CUTTING AND STAPLING APPARATUS WITH MANUALLY RETRACTABLE FIRING SYSTEM

• US 20160174984A1
• Filed: 02/26/2016
• Published: 06/23/2016
• Est. Priority Date: 10/10/2008
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery LLC (Johnson & Johnson)
• Inventors: Smith, Bret W., Abbott, Daniel J., Schwemberger, Richard F., Shelton, Frederick E. IV, Boudreaux, Chad P., Swensgard, Brett E., Laurent, Ryan J.
• Granted Patent: US 10,149,683 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 17/0686 having a forming anvil staying below the tissue during stapling
• 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 17/10 for applying or removing wound clamps, e.g. containing only one clamp or staple A61B17/076 takes precedence; containing multiple wound clamps A61B17/068; Wound clamp magazines containers, packaging elements or packages specially adapted for particular articles or with special means for dispensing contents B65D83/00, B65D85/00
• CPC Class Codes: A61B 17/105 Wound clamp magazines for packaging sharps A61B50/3001
• CPC Class Codes: A61B 2017/00398 using powered actuators, e.g. stepper motors, solenoids
• CPC Class Codes: A61B 2017/00734 battery operated
• CPC Class Codes: A61B 2017/07214 Stapler heads
• CPC Class Codes: A61B 2017/2923 Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2927 the angular position of the head being adjustable with respect to the shaft
• CPC Class Codes: A61B 2017/2946 Locking means
• CPC Class Codes: A61B 2017/320052 Guides for cutting instruments by marking A61B2090/395
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

In one general aspect, various embodiments of the present invention can include a motorized surgical cutting and fastening instrument having a drive shaft, a motor selectively engageable with the drive shaft, and a manual return mechanism configured to operably disengage the motor from the drive shaft and retract the drive shaft. In at least one embodiment, a surgeon, or other operator of the surgical instrument, can utilize the manual return mechanism to retract the drive shaft after it has been advanced, especially when the motor, or a power source supplying the motor, has failed or is otherwise unable to provide a force sufficient to retract the drive shaft.

Claims

1-24. -24. (canceled)

25. A surgical fastening apparatus, comprising:

an end effector, comprising a firing member movable between a starting position and an ending position within said end effector;

a rotary drive shaft operably interfacing with said movable firing member such that rotation of said rotary drive shaft in a first rotary output direction causes said movable firing member to linearly advance in a distal direction within said end effector and rotation of said rotary drive shaft in a second rotary output direction causes said movable firing member to linearly retract in a proximal direction within said end effector;

a motor mechanically coupleable with said rotary drive shaft such that operation of said motor in a first rotary input direction causes said rotary drive shaft to rotate in said first rotary output direction and operation of said motor in a second rotary input direction causes said rotary drive shaft to rotate in said second rotary output direction; and

a manually actuatable bailout system configured to selectively mechanically decouple said motor from said rotary drive shaft and manually apply rotary control motions to said rotary drive shaft in said second rotary input direction.

26. The surgical fastening apparatus of claim 25, wherein said firing member comprises a cutting member and wherein a drive nut operably interfaces said rotary drive shaft with said cutting member.

27. The surgical fastening apparatus of claim 26, wherein said rotary drive shaft comprises a helical thread formed on an outer surface thereof and in threaded engagement with said drive nut.

28. The surgical fastening apparatus of claim 25, wherein said motor comprises a rotary drive gear and wherein said manually actuatable bailout system comprises:

a pinion gear movable between an engaged position wherein said pinion gear is in meshing engagement with said rotary drive gear and a disengaged position wherein said pinion is disengaged from said rotary drive gear; and

means for selectively retaining said pinion gear in said engaged position, said means for selectively retaining automatically moving said pinion gear to said disengaged position upon actuation of said means for selectively retaining.

29. The surgical fastening apparatus of claim 25, wherein said motor comprises an electric motor powered by a battery and wherein said manually actuatable bailout system is configured to selectively electrically decouple said electric motor from said battery.

30. The surgical fastening apparatus of claim 29, wherein said battery cannot apply a voltage potential to said electric motor when said bailout system has electrically disconnected said battery from said electric motor.

31. The surgical fastening apparatus of claim 25, wherein said end effector comprises:

a first jaw;

a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position; and

a fastener cartridge comprising a plurality of fasteners removably stored therein.

32. The surgical fastening apparatus of claim 31, wherein said fastener cartridge is supported by said second jaw.

33. The surgical fastening apparatus of claim 25, wherein said motor is supported in a handle and wherein said manually actuatable bailout system is supported by said handle.

34. The surgical fastening apparatus of claim 33, wherein said movable firing member linearly moves along a shaft axis and wherein said manually actuatable bailout system comprises a retraction lever movably supported on said handle, said retraction lever being manually movable along another axis that is transverse to said shaft axis.

35. A surgical fastening apparatus, comprising:

an end effector, comprising;

a first jaw;

a second jaw, wherein said first jaw is movable relative to said second jaw between an open position and a closed position; and

a fastener cartridge comprising a plurality of fasteners removably stored therein; and

a firing member movable between a starting position and an ending position within said end effector and wherein said surgical fastening apparatus further comprises;

a handle;

a rotary drive shaft operably interfacing with said movable firing member such that rotation of said rotary drive shaft in a first rotary output direction causes said movable firing member to linearly advance in a distal direction within said end effector and rotation of said rotary drive shaft in a second rotary output direction causes said movable firing member to linearly retract in a proximal direction within said end effector;

an electric motor supported by said handle and being mechanically coupleable with said rotary drive shaft such that operation of said motor in a first rotary input direction causes said rotary drive shaft to rotate in said first rotary output direction and operation of said motor in a second rotary input direction causes said rotary drive shaft to rotate in said second rotary output direction;

a battery supported by said handle and being configured to supply power to said electric motor; and

a manually actuatable bailout system supported by said handle and being configured to selectively mechanically decouple said electric motor from said rotary drive shaft and manually apply rotary control motions to said rotary drive shaft in said second rotary input direction.

36. The surgical fastening apparatus of claim 35, wherein said fastener cartridge is supported by said second jaw.

37. The surgical fastening apparatus of claim 35, wherein said movable firing member linearly moves along a shaft axis and wherein said manually actuatable bailout system comprises a retraction lever movably supported on said handle, said retraction lever being manually movable along another axis that is transverse to said shaft axis.

38. A surgical fastening apparatus, comprising:

an end effector, comprising a firing member movable between a starting position and an ending position within said end effector;

a rotary drive shaft operably interfacing with said movable firing member such that rotation of said rotary drive shaft in a first rotary output direction causes said movable firing member to linearly advance in a distal direction within said end effector and rotation of said rotary drive shaft in a second rotary output direction causes said movable firing member to linearly retract in a proximal direction within said end effector;

a motor mechanically coupleable with said rotary drive shaft such that operation of said motor in a first rotary input direction causes said rotary drive shaft to rotate in said first rotary output direction and operation of said motor in a second rotary input direction causes said rotary drive shaft to rotate in said second rotary output direction; and

a manually actuatable means for selectively mechanically decoupling said motor from said rotary drive shaft and manually applying rotary control motions to said rotary drive shaft in said second rotary input direction.

39. The surgical fastening apparatus of claim 38, wherein said firing member comprises a cutting member and wherein a drive nut operably interfaces said rotary drive shaft with said cutting member.

40. The surgical fastening apparatus of claim 39, wherein said rotary drive shaft comprises a helical thread formed on an outer surface thereof and in threaded engagement with said drive nut.

41. The surgical fastening apparatus of claim 38, wherein said motor comprises an electric motor powered by a battery and wherein said manually actuatable means is configured to selectively electrically decouple said electric motor from said battery.

42. The surgical fastening apparatus of claim 41, wherein said battery cannot apply a voltage potential to said electric motor when said manually actuatable means has electrically disconnected said battery from said electric motor.