Surgical instrument having a common trigger for actuating an end effector closing system and a staple firing system

• US 20080296345A1
• Filed: 06/04/2007
• Published: 12/04/2008
• Est. Priority Date: 06/04/2007
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Timm, Richard W., Shelton, Frederick E. IV
• Granted Patent: US 7,819,299 B2
• Time in Patent Office: Days
• US Class Current: 227/176.1
• CPC Class Codes: A61B 17/07207 the staples being applied sequentially
• CPC Class Codes: A61B 17/2909 Handles
• CPC Class Codes: A61B 2017/00367 Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like
• CPC Class Codes: A61B 2017/2923 Toothed members, e.g. rack and pinion
• CPC Class Codes: A61B 2017/2925 Pistol grips

Abstract

A surgical instrument including a trigger which can be configured to close a jaw member upon a first actuation of the trigger and advance a staple driver and/or cutting member upon a subsequent, or second, actuation of the trigger. Such a surgical instrument can allow a surgeon to position the surgical instrument in a surgical site and close the jaw member with an initial actuation of the trigger without deploying any staples into, or incising, the tissue. As a result, the surgeon can manipulate the position of the surgical instrument and then actuate the trigger a second time to deploy staples into, and/or incise, the tissue. In at least one such embodiment, the first actuation of the trigger which closes the jaw member can also unlock a firing drive configured to advance the staple driver and cutting member during the second actuation of the trigger.

Claims

1. A surgical instrument, comprising:

a handle;

a trigger operably coupled to said handle;

a closure drive operatively engaged with said trigger, wherein said closure drive is configured to generate a closing motion upon a first actuation of said trigger;

a firing drive, wherein said firing drive is not operably engaged with said trigger prior to said first actuation of said trigger, wherein said firing drive is configured to engage said trigger as a result of said first actuation, and wherein said firing drive is configured to generate a firing motion upon a second actuation of said trigger;

an elongate shaft assembly coupled to said handle, wherein said elongate shaft assembly is operably engaged with said firing drive; and

an end effector coupled to said elongate shaft assembly, said end effector comprising;

an elongate channel configured to operably support a staple cartridge therein;

an anvil movably coupled to said elongate channel, wherein said anvil is operably engaged with said closure drive and is movably responsive to said closing motion; and

a cutting member operably supported within said elongate channel, wherein said cutting member is operably engaged with said elongate shaft assembly and is responsive to said firing motion from said firing drive.

2. The surgical instrument of claim 1, wherein said firing drive is further configured to generate a retraction motion upon an other actuation of said trigger, and wherein said cutting member is responsive to said retraction motion from said firing drive.

3. The surgical instrument of claim 1, wherein said elongate shaft assembly includes a rotatable drive shaft, and wherein said firing drive is configured to transmit rotary firing motion to said drive shaft.

4. The surgical instrument of claim 1, wherein said trigger further includes a trigger gear portion, wherein said firing drive further includes a drive gear and an intermediate gear, wherein said drive gear is operatively engaged with said elongate shaft assembly to transmit said firing motion to said cutting member, wherein said intermediate gear is not operably engaged with said drive gear prior to said first actuation of said trigger, and wherein said intermediate gear is operably engaged with said trigger gear portion and said drive gear as a result of said first actuation of said trigger.

5. The surgical instrument of claim 4, wherein said intermediate gear includes a first ratchet face, wherein said drive gear further includes a second ratchet face, and wherein said firing drive further includes a spring configured to bias said first ratchet face of said intermediate gear into operative engagement with said second ratchet face of said drive gear.

6. The surgical instrument of claim 4, wherein said firing drive further includes a spring configured to bias said intermediate gear into operative engagement with said drive gear, wherein said closure drive further includes a cam, and wherein said cam is configured to bias said intermediate gear out of engagement with said drive gear prior to said first actuation of said trigger and release said intermediate gear prior to said second actuation of said trigger.

7. The surgical instrument of claim 6, wherein said cam is movable between a first position and a second position as a result of said first actuation of said trigger, and wherein said closure drive further includes a lock configured to hold said cam in said second position during said second actuation of said trigger.

8. The surgical instrument of claim 7, wherein said firing drive is further configured to generate a retraction motion upon an other actuation of said trigger, wherein said cutting member is responsive to said retraction motion from said firing drive, wherein said firing drive is configured to release said cam from said lock as a result of said other actuation, wherein said closure drive further includes a return spring connected to said cam and said handle, and wherein said return spring is configured to return said cam to said first position.

9. The surgical instrument of claim 8, wherein said firing drive is further configured to disengage said intermediate gear from said drive gear as a result of said other actuation of said trigger and reposition said cam to bias said intermediate gear out of operative engagement with said drive gear.

10. A method for processing an instrument for surgery, the method comprising:

obtaining the surgical instrument of claim 1;

sterilizing the surgical instrument; and

storing the surgical instrument in a sterile container.

11. A surgical instrument, comprising:

a handle;

a trigger operably coupled to said handle;

a closure drive operatively engaged with said trigger, wherein said closure drive is configured to generate a closing motion upon a first actuation of said trigger;

a firing drive operatively engaged with said trigger, wherein said firing drive is configured to generate a firing motion upon a second actuation of said trigger, and wherein said firing drive is further configured to generate a retraction motion upon an other actuation of said trigger;

an elongate shaft assembly coupled to said handle, wherein said elongate shaft assembly is operably engaged with said firing drive; and

an end effector coupled to said elongate shaft assembly, said end effector comprising;

an elongate channel configured to operably support a staple cartridge therein;

an anvil movably coupled to said elongate channel, wherein said anvil is operably engaged with said closure drive and is movably responsive to said closing motion; and

a cutting member operably supported within said elongate channel, wherein said cutting member is operably engaged with said elongate shaft assembly and is responsive to said firing and said retraction motions from said firing drive.

12. The surgical instrument of claim 11, wherein said closure drive further includes a cam operably engaged with said trigger, wherein said closure drive further includes a drive link operably engaged with said cam and said anvil, and wherein said cam is configured to motivate said drive link upon said first actuation of said trigger and pivot said anvil into a closed position.

13. The surgical instrument of claim 12, wherein said cam is movable between a first position and a second position as a result of said first actuation of said trigger, and wherein said closure drive further includes a lock configured to retain said cam in said second position during said second actuation of said trigger.

14. The surgical instrument of claim 13, wherein said firing drive is configured to release said cam from said lock as a result of said other actuation, wherein said closure drive further includes a return spring connected to said cam and said handle, and wherein said return spring is configured to return said cam to said first position.

15. The surgical instrument of claim 12, wherein said firing drive further includes a drive member operably engaged with said elongate shaft assembly, and wherein said drive member is selectively engaged with said trigger to transmit said firing motion to said cutting member.

16. The surgical instrument of claim 15, wherein said cam is configured to bias said firing drive out of engagement with said trigger in a first condition and release said firing drive to engage said trigger in a second condition.

17. The surgical instrument of claim 11, wherein said firing drive is not operably engaged with said trigger prior to said first actuation of said trigger, and wherein said firing drive is configured to engage said trigger as a result of said first actuation.

18. A method for processing an instrument for surgery, the method comprising:

obtaining the surgical instrument of claim 11;

sterilizing the surgical instrument; and

storing the surgical instrument in a sterile container.

19. A surgical instrument, comprising:

a handle;

a trigger operably coupled to said handle;

a closure drive operatively engaged with said trigger, wherein said closure drive is configured to generate a closing motion upon a first actuation of said trigger;

a firing drive operatively engaged with said trigger, wherein said firing drive is configured to generate a firing motion upon a second actuation of said trigger, and wherein said firing drive is further configured to generate a second firing motion upon a third actuation of said trigger;

an elongate shaft assembly coupled to said handle, wherein said elongate shaft assembly is operably engaged with said firing drive; and

an end effector coupled to said elongate shaft assembly, said end effector comprising;

an elongate channel configured to operably support a staple cartridge therein;

an anvil movably coupled to said elongate channel, wherein said anvil is operably engaged with said closure drive and is movably responsive to said closing motion; and

a cutting member operably supported within said elongate channel, wherein said cutting member is operably engaged with said elongate shaft assembly and is responsive to said first and second firing motions from said firing drive.

20. A method for processing an instrument for surgery, the method comprising:

obtaining the surgical instrument of claim 19;

sterilizing the surgical instrument; and

storing the surgical instrument in a sterile container.