Through the scope tension member release clip

• US 8,088,061 B2
• Filed: 01/30/2009
• Issued: 01/03/2012
• Est. Priority Date: 09/30/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Wells, Brian Keith, Wolf, Lance Alan, Furnish, Gregory R., Abramov, Vasily P., Kelly, William C. Mers, Durgin, Russell F.
• Primary Examiner(s): KASZTEJNA, MATTHEW JOHN
• Application Number:
  US12/362,610
• Publication Number:
  US 20090138028A1
• Time in Patent Office: 1,068 Days
• Field of Search: 600/104, 606/151, 606157-158, 606/142
• US Class Current: 600/104
• CPC Class Codes: A61B 17/122 Clamps or clips , e.g. for the umbilical cord for the vas deferens A61F6/206
• CPC Class Codes: A61B 17/1227 Spring clips
• CPC Class Codes: A61B 17/1285 for minimally invasive surgery
• CPC Class Codes: A61B 2017/003 Steerable
• CPC Class Codes: A61B 2017/00845 of moving parts with respect to each other
• CPC Class Codes: A61B 2017/00849 with respect to tissue, e.g. hollow organs
• CPC Class Codes: A61B 2017/12004 for haemostasis, for prevention of bleeding
• CPC Class Codes: A61B 2017/292 connection of actuating rod to handle, e.g. ball end in recess
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61B 2090/037 with a frangible part, e.g. by reduced diameter
• CPC Class Codes: A61B 2090/038 during shipment
• CPC Class Codes: A61B 34/76 Manipulators having means for providing feel, e.g. force or tactile feedback

Abstract

An apparatus for deployment of a hemostatic clip comprises a handle assembly, a shaft connected to a distal portion thereof and a clip assembly releasably coupled to a distal portion of the shaft. The clip assembly includes clip arms and a capsule cooperating with the clip arms to provide a first user feedback indicating a decision configuration of the clip assembly. In addition, the apparatus includes a control wire including a ball connector, the control wire extending from the handle assembly and coupled to the clip assembly by the ball connector to maintain the clip assembly coupled to the shaft, wherein the ball connector is detachable from the clip assembly to provide a second user feedback indicating separation of the clip assembly from the shaft.

Claims

1. Apparatus for deployment of a hemostatic clip, comprising:

a handle assembly;

a shaft connected to a distal portion of the handle assembly;

a clip assembly releasably coupled to the shaft; and

a control wire including a ball connector, the control wire being coupled to the clip assembly by the ball connector to maintain the clip assembly coupled to the shaft, wherein the ball connector is detachable from the control wire to provide a first user feedback indicating separation of the clip assembly from the shaft.

2. The apparatus according to claim 1, wherein the clip assembly includes clip arms and a capsule cooperating with the clip arms to provide a second user feedback indicating a decision configuration of the clip assembly.

3. The apparatus according to claim 2, wherein the clip arms further comprise stop shoulders engaging a distal end of the capsule to provide the second user feedback during proximal movement of the control wire.

4. The apparatus according to claim 2, wherein the decision configuration indicates a position of the control wire beyond which further proximal movement of the control wire precludes return of the clip arms to an open configuration by a reversed movement of the control wire.

5. The apparatus according to claim 2, wherein the capsule further comprises:

a yoke including a ball cavity and being slidable within the capsule, the yoke receiving the ball connector in the ball cavity; and

a tension member releasably connected to the yoke, the tension member being connected to the clip arms and biasing the clip arms toward an open configuration, wherein the tension member releases from the yoke when the control wire is moved proximally beyond the position at which the second user feedback is provided.

6. The apparatus according to claim 5, wherein the tension member and the yoke are releasably connected to one another by a male C section member and a female C section member.

7. The apparatus according to claim 6, wherein a separation of the yoke and the tension member occurs by one of fracture and deformation of the male C section member.

8. The apparatus according to claim 7, wherein a separation of the yoke and the tension member occurs when a tension on the control wire is at least a predetermined separation tension.

9. The apparatus according to claim 8, wherein the separation tension is at least approximately 4 lbf.

10. The apparatus according to claim 8, wherein the separation tension is less than approximately 12 lbf.

11. The apparatus according to claim 5, wherein a separation of the yoke and the tension member locks the clip arms in a closed configuration by sliding the tension member and the clip arms proximally within the capsule.

12. The apparatus according to claim 5, wherein a separation of the yoke and the tension member allows proximal movement of the yoke to release the capsule from a bushing of the shaft.

13. The apparatus according to claim 5, wherein distal movement of the control wire, before separation of the yoke from the tension member, slides the clip arms distally out of the capsule into an open configuration.

14. The apparatus according to claim 2, wherein the second feedback includes a tactile feedback.

15. The apparatus according to claim 2, wherein the second feedback includes an aural feedback.

16. The apparatus according to claim 1, wherein the control wire extends from the handle assembly.

17. The apparatus according to claim 1, further comprising:

an over sheath movable between a first position covering the shaft and the clip assembly and a second position uncovering the clip assembly.

18. The apparatus according to claim 17, further comprising:

an over sheath stop engageable on the shaft to prevent movement of the over sheath to the second position.