Slide-activated cutting assembly

• US 7,384,421 B2
• Filed: 09/30/2005
• Issued: 06/10/2008
• Est. Priority Date: 10/06/2004
• Status: Expired due to Fees

• Current Assignee: Covidien AG (Medtronic Plc)
• Original Assignee: Sherwood Services AG
• Inventors: Hushka, Dylan
• Primary Examiner(s): Johnson, III; Henry M
• Application Number:
  US11/239,767
• Publication Number:
  US 20060074416A1
• Time in Patent Office: 984 Days
• Field of Search: 606 41- 52
• US Class Current: 606/51
• 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 18/1445 at the distal end of a shaft, e.g. forceps or scissors at the end of a rigid rod
• CPC Class Codes: A61B 2018/00601 Cutting
• CPC Class Codes: A61B 2018/00946 slidable
• CPC Class Codes: A61B 2018/1412 Blade
• CPC Class Codes: A61B 2018/1455 having a moving blade for cutting tissue grasped by the jaws

Abstract

An endoscopic bipolar forceps is provided. The forceps includes a housing, a shaft, a drive assembly, a handle assembly and a slide activated cutting assembly. The shaft is affixed to the housing and comprises an end effector assembly comprising two jaw members at its distal end. The drive assembly is configured to move the end effector assembly. The handle assembly is in mechanical cooperation with the drive assembly. The slide-activated cutting assembly is disposed at least partially within the housing and move a knife rod comprising a knife blade at its distal end to cut tissue along a tissue seal. A source of electrosurgical energy is adapted to connect to each jaw member to enable them to conduct energy through tissue to affect a tissue seal.

Claims

1. An endoscopic bipolar forceps, comprising:

a housing;

a shaft affixed to the housing comprising an end effector assembly comprising two jaw members at a distal end thereof, the shaft defining a longitudinal axis;

a drive assembly configured to move at least a portion of the end effector assembly;

a handle assembly comprising a movable handle adapted to force a drive flange of the movable handle into mechanical cooperation with the drive assembly to move at least a portion of the end effector assembly; and

a slide-activated cutting assembly disposed at least partially within the housing adapted to move a knife rod comprising a knife blade at a distal end thereof to cut tissue along a tissue seal, the slide-activated cutting assembly further including;

a slide trigger configured to be pushed distally to move the knife rod distally;

a knife slide adapted to facilitate translation of the knife rod, a proximal portion of the knife slide being in mechanical engagement with the slide trigger and a distal portion of the knife slide being in mechanical engagement with the knife rod;

a collar clamp operatively connected to the knife slide adapted to maintain alignment of the knife slide during translation of the knife rod; and

wherein a source of electrosurgical energy is adapted to connect to each jaw member such that the jaw members are capable of conducting energy through tissue held therebetween to effect a tissue seal.

2. The endoscopic bipolar forceps according to claim 1, wherein the slide trigger is configured to be pulled proximally to move the knife rod proximally.

3. The endoscopic bipolar forceps according to claim 1, wherein the slide trigger comprises a generally arcuate-shaped finger rest.

4. The endoscopic bipolar forceps according to claim 1, wherein the slide-activated cutting assembly further comprises a spring in mechanical engagement with the knife slide which biases the knife slide in a proximal position.

5. The endoscopic bipolar forceps according to claim 1, further comprising a rotating assembly adapted to rotate the jaw members about the longitudinal axis defined by the shaft.

6. The endoscopic bipolar forceps according to claim 1, further comprising a switch disposed within the housing and in electromechanical cooperation with a source of electrosurgical energy, the switch allowing a user to selectively supply bipolar energy to the jaw members to effect the tissue seal.

7. The endoscopic bipolar forceps according to claim 1, wherein the drive assembly comprises a reciprocating sleeve that is adapted to, upon activation of the movable handle, translate one of the jaw members relative to the other jaw member.

8. The endoscopic bipolar forceps according to claim 1, wherein the slide assembly comprises at least one spring adapted to bias the knife rod proximally.

9. The endoscopic bipolar forceps according to claim 1, wherein the forceps is further defined by being in-line.

10. A slide-activated cutting assembly for use with a surgical instrument, comprising:

a slide trigger comprising a flange; and

a knife assembly comprising a knife slide, a cutter collar, a knife rod and a collar clamp, the knife slide comprising a proximal portion in mechanical cooperation with the flange of the slide trigger and a distal portion, the cutter collar being operatively connected with the distal portion of the knife slide, the knife rod extending distally from the cutter collar, the collar clamp which maintains alignment of the knife assembly during translation of the knife rod and being positioned adjacent the cutter collar,

wherein the slide trigger and the knife assembly mutually cooperate to translate the knife rod upon translation of the slide trigger.

11. The slide-activated cutting assembly according to claim 10, wherein the slide trigger comprises a generally arcuate finger rest.

12. The slide-activated cutting assembly according to claim 10, further comprising a knife blade supported on the knife rod.

13. The slide-activated cutting assembly according to claim 10, further comprising a spring adapted to bias the knife assembly proximally.