Through the scope tension member release clip

• US 7,452,327 B2
• Filed: 09/30/2004
• Issued: 11/18/2008
• Est. Priority Date: 09/30/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Durgin, Russell F., Furnish, Gregory R., Wells, Brian Keith, Wolf, Lance Alan, Kelly, William C. Mers, Abramov, Vasily P.
• Primary Examiner(s): KASZTEJNA, MATTHEW JOHN
• Application Number:
  US10/955,624
• Publication Number:
  US 20050080440A1
• Time in Patent Office: 1,510 Days
• Field of Search: 606/151, 606157-158, 606/142, 600/104
• US Class Current: 600/104
• CPC Class Codes: A61B 17/0682 for applying U-shaped staples or clamps, e.g. without a forming anvil
• CPC Class Codes: A61B 17/083 Clips, e.g. resilient
• 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 2034/715 Cable tensioning mechanisms for removing slack
• 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 34/71 Manipulators operated by drive cable mechanisms
• CPC Class Codes: A61B 34/76 Manipulators having means for providing feel, e.g. force or tactile feedback

Abstract

A hemostatic clip assembly for mounting on a delivery device comprises a capsule and a clip slidably mounted within the capsule so that, when the clip is drawn proximally into the capsule, arms of the clip are drawn together to a closed position, an abutting surface of at least one of the arms contacting a corresponding surface of the capsule when the clip is drawn to a predetermined position within the capsule to provide a first user feedback indicating closure of the clip in combination with a tension member connected to the clip arms and biasing the clip arms toward an open, tissue receiving configuration and a yoke slidably received within the capsule and releasably coupled to the tension member, the yoke including a ball cavity for receiving a ball connector of a control element of the delivery device to maintain the clip assembly coupled to the delivery device, wherein the control element is frangible to detach the yoke from the delivery device and to provide a second user feedback and, wherein release of the yoke from the tension member provides a third user feedback.

Claims

1. A hemostatic clip assembly for mounting on a delivery device comprising:

a capsule;

a clip slidably mounted within the capsule so that, when the clip is drawn proximally into the capsule, arms of the clip are drawn together to a closed position, an abutting surface of at least one of the arms contacting a corresponding surface of the capsule when the clip is drawn to a predetermined position within the capsule to provide a first user feedback indicating closure of the clip;

a tension member connected to the clip arms; and

a yoke slidably received within the capsule and releasably coupled to the tension member, the yoke including a ball cavity for receiving a ball connector of a control element of the delivery device to maintain the clip assembly coupled to the delivery device, wherein the control element is frangible to detach the yoke from the delivery device and to provide a second user feedback and, wherein release of the yoke from the tension member provides a third user feedback.

2. The clip assembly according to claim 1, wherein the yoke includes a tapered proximal end which, when the yoke is extended distally out of a distal end of the capsule, engages the distal end of the capsule to facilitate drawing of the yoke proximally back into the capsule.

3. The clip assembly according to claim 1, wherein the first user feedback indicates a position at which, further proximal movement of the control element will preclude a return of the clip arms to the open configuration by a reversed movement of the control element.

4. The clip assembly according to claim 1, wherein a first one of the tension member and the yoke includes a male C section member and the other of the tension member and the yoke includes a female C section member releasably receiving the male C section member.

5. The clip assembly according to claim 4, wherein separation of the yoke from the tension member occurs by one of fracture and deformation of the male C section member.

6. The clip assembly according to claim 5, wherein the yoke and tension members separate only when subject to a tension of at least a predetermined separation tension.

7. The clip assembly according to claim 4, wherein the separation tension is at least approximately 4 lbf.

8. The clip assembly according to claim 7, wherein the separation tension is less than approximately 12 lbf.

9. The clip assembly according to claim 1, wherein separation of the yoke from the tension member locks the clip arms in a closed configuration.

10. The clip assembly according to claim 1, wherein separation of the yoke from the tension member allows further proximal movement of the yoke to release the capsule from the control element.

11. The clip assembly according to claim 1, wherein, before separation of the yoke from the tension member, distal movement of a control wire slides the clip arms distally Out of the capsule into the open configuration.

12. The clip assembly according to claim 1, wherein the first feedback includes one of tactile and aural feedback.

13. The clip assembly according to claim 1, wherein the capsule includes a plurality of tab receiving openings formed adjacent a proximal end thereof, the tab receiving openings being oriented at an angle relative to an axis of the capsule.

14. The clip assembly according to claim 1, wherein the clip arms are biased toward an open position.

15. The clip assembly according to claim 1, wherein the capsule includes a camming surface which, when the clip is moved distally out of the capsule, move the clip arms to an open position.