Surgical trocar having obturator handle with flexible contact portion

• US 5,997,510 A
• Filed: 04/09/1998
• Issued: 12/07/1999
• Est. Priority Date: 03/26/1997
• Status: Expired due to Term

• Current Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Original Assignee: Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Inventors: Schwemberger, Richard F.
• Primary Examiner(s): Coggins, Wynn Wood
• Assistant Examiner(s): Blyveis, Deborah
• Application Number:
  US09/057,687
• Time in Patent Office: 607 Days
• Field of Search: 604/164, 604/171, 604/174, 604/180, 604/280, 604/264, 604/192, 604/198, 604/263, 604/162, 606/184
• US Class Current: 604/164.11
• CPC Class Codes: A61B 17/3496 Protecting sleeves or inner probes; Retractable tips for protecting body piercing guide needles A61M25/0612
• CPC Class Codes: A61B 17/3498 Valves therefor, e.g. flapper valves, slide valves haemostasis valves A61M39/06; check valves A61M39/24

Abstract

A surgical trocar has a cannula assembly including a sleeve having a proximal end, a distal end and a passageway therethrough. A housing having an opening is located at the proximal end of the sleeve and is aligned with the passageway of the sleeve. The trocar also includes an obturator assembly which is insertable in the cannula assembly. The obturator assembly includes a handle having an opening therein and a flexible contact portion which is outwardly deflectable from the handle. The obturator assembly also includes an obturator having a proximal end connected to the handle and a distal end opposite the proximal end. A penetrating tip is located at the shaft distal end for penetrating tissue. A protector having a distal end is slidably disposed around the obturator shaft for covering the penetrating tip. The protector has an aperture at its distal end for permitting the penetrating tip to pass therethrough. The protector proximal end is movable against the flexible contact portion of the obturator handle to expose the penetrating tip when a proximal force is asserted against the protector.

Claims

1. An obturator assembly comprising:

a handle having an opening therein and a flexible contact portion, said flexible contact portion being outwardly deflectable from said handle;

an obturator shaft extending through said handle opening and having a proximal end fixed to said handle and a distal end having a penetrating tip thereon;

a protector slidably disposed around said obturator shaft and also extending through said handle opening for covering said penetrating tip of said obturator shaft, said protector having an aperture at a distal end thereof for permitting said penetrating tip of said obturator shaft to pass therethrough, said protector also having a proximal end movable against said flexible contact portion of said handle to a retracted position in order to expose said penetrating tip when a proximal force is placed against said protector.

2. The obturator assembly according to claim 1, wherein said contact portion comprises a pair of deflectable members.

3. The obturator assembly according to claim 2, wherein each deflectable member has an inner surface thereon.

4. The obturator assembly according to claim 3, wherein said proximal end of said protector is slidably movable against said inner surfaces of said deflectable members.

5. The obturator assembly according to claim 4, wherein said proximal end of said protector outwardly deflects said deflectable members away from said obturator shaft.

6. A surgical trocar comprising:

a cannula assembly including a sleeve having a proximal end and a distal end and a passageway therethrough, said cannula assembly also including a housing having an opening and being located at said proximal end of said sleeve, said housing opening being aligned with said passageway of said sleeve;

an obturator assembly insertable into said cannula assembly and including a handle having a handle opening therein and a flexible contact portion, said flexible contact portion being outwardly deflectable from said handle, an obturator shaft extending through said handle opening and having a proximal end fixed to said handle and a distal end having a penetrating tip thereon;

a protector slidably disposed around said obturator shaft and also extending through said handle opening for covering said penetrating tip of said obturator shaft, said protector having an aperture at a distal end thereof for permitting said penetrating tip of said obturator shaft to pass therethrough, said protector also having a proximal end movable against said flexible contact portion of said handle to a retracted position in order to expose said penetrating tip when a proximal force is placed against said protector.

7. The surgical trocar according to claim 6, wherein said contact portion comprises a pair of deflectable members.

8. The surgical trocar according to claim 7, wherein each deflectable member has an inner surface thereon.

9. The surgical trocar according to claim 8, wherein said proximal end of said protector is slidably movable against said inner surfaces of said deflectable members.

10. The surgical trocar according to claim 9, wherein said proximal end of said protector outwardly deflects said deflectable members away from said obturator shaft.

11. The surgical trocar according to claim 10, wherein said protector includes a boss for contacting said handle when said protector is retracted to said retracted position.

12. The surgical trocar according to claim 11, including a seal assembly located in said opening of said housing.

13. The surgical trocar according to claim 12, wherein said housing includes at least one slot and said handle includes at least one pin detachably engageable with said at least one slot for locking said handle to said housing.

14. The surgical trocar according to claim 13 wherein said penetrating tip includes a flat blade.

15. The surgical trocar according to claim 14, wherein said protector includes a dilation section at said distal end of said protector.

16. The surgical trocar according to claim 15, wherein said sleeve includes a helical thread on an exterior surface of said sleeve.