Operating trocar

• US 6,863,674 B2
• Filed: 12/23/2002
• Issued: 03/08/2005
• Est. Priority Date: 12/28/2001
• Status: Expired due to Term

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Kogasaka, Takahiro, Kasahara, Hideyuki
• Primary Examiner(s): RODRIGUEZ, CRIS LOIREN
• Application Number:
  US10/328,237
• Publication Number:
  US 20030125666A1
• Time in Patent Office: 806 Days
• Field of Search: 606/108, 606/170, 606/167, 606184-186, 606/1, 604/117, 604/164.01, 604/264, 604174-180, 604104-109, 604/164.04, 604/169.09, 604/167.01, 604/167.02, 604/167.06, 128/DIG.26, 600/114
• US Class Current: 606/108
• CPC Class Codes: A61B 17/3421 Cannulas
• CPC Class Codes: A61B 2017/3492 against the outside of the body

Abstract

An operating trocar according to the invention includes a guide tube inserted through a body surface to introduce an endoscope and an operating instrument into a living body, and a flange portion provided on the guide tube to make a predetermined angle with a plane approximately perpendicular to an axial direction of the guide tube, the flange portion being fixed to an outer surface of the body surface. Preferably, the operating trocar also includes a gastightness retaining portion provided in the guide tube to retain gastightness between a circumferential surface of an internal hole of the guide tube and a medical instrument such as an endoscope and an operating instrument inserted in the internal hole of the guide tube.

Claims

1. A trocar for endoscopic operation, comprising:

a guide tube for introducing a medical instrument into a living body, the guide tube having a straight shape relative to a longitudinal axis; and

a flange provided on an outer circumference of the guide tube, the flange having a contact surface which comes into contact with an outer surface of a living body, the flange being oblique with respect to the longitudinal axis of the guide tube and positioned at a location other than at a proximal and distal end of the guide tube such that a portion of the guide tube is exposed outside the outer surface of the living body when the trocar is inserted therein.

2. A trocar according to claim 1, wherein the guide tube and the flange are integrally formed.

3. A trocar according to claim 1, wherein at least a portion of the trocar is formed of an elastic material.

4. A trocar according to claim 1, further comprising a fixing portion for fixing the trocar to the living body.

5. A trocar according to claim 4, wherein the fixing portion is an adhesive layer provided on the contact surface of the flange.

6. A trocar according to claim 4, wherein the fixing portion is an adhesive sheet having at least a portion wider in area than the flange and adhered to a surface of the flange opposite to the contact surface.

7. A trocar according to claim 4, wherein the fixing portion is a band extending from the flange.

8. A trocar according to claim 1, wherein the flange has at least one hole through which to pass a suture.

9. A trocar according to claim 1, wherein the flange is removably secured to the guide tube.

10. A trocar according to claim 1, wherein a gastightness retaining member is provided in an interior of the guide tube.

11. A trocar according to claim 1, wherein the wall thickness of the flange differs from that of the guide tube.