Surgical trocar and spike assembly

• US 5,368,607 A
• Filed: 10/06/1992
• Issued: 11/29/1994
• Est. Priority Date: 02/19/1991
• Status: Expired due to Term

• Current Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Original Assignee: Dexide, Inc.
• Inventors: Freitas, Michael
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US07/957,206
• Time in Patent Office: 784 Days
• Field of Search: 604/22, 604/23, 604/26, 604/167, 604/170, 604/172, 604/751, 604/753, 604/754, 604/164, 604/272-274, 604/51, 606/167-172, 128/751-754
• US Class Current: 606/172
• 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 2017/00477 Coupling A61B2017/0046 takes precedence
• CPC Class Codes: A61B 2017/3454 Details of tips
• CPC Class Codes: A61B 2090/08021 of the patient or his organs

Abstract

A surgical trocar instrument is provided which includes a trocar spike designed to prevent coring of the needlepoint of a trocar tube and which is secured to a knob or holding assembly in a manner that the trocar tube resists relative rotational movement and the spike assembly is biased outwardly of the needlenose of the trocar tube, but the bias may be overcome upon insertion of the trocar tube through a cavity wall, with the bias moving the spike assembly outwardly of the trocar tube to prevent coring during additional surgical maneuvers.

Claims

1. A surgical trocar spike for penetration through a body wall and into a body cavity, the spike comprising:

a cylindrical housing including an inboard end and an outboard open end, said cylindrical housing defining an elliptical configuration terminating in a sharpened needle point at the outboard end of said cylindrical housing; and

coring prevention means received within said cylindrical housing and biased for extension outboard-most of said needle point for urging solid materials away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said body wall; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of said cylindrical housing.

2. A surgical trocar spike concentrically insertable through a tubular trocar housing for penetration of the spike and housing through a body wall and into a body cavity, the spike comprising:

a cylindrical housing including an inboard end and an outboard open end extendable through said trocar housing, said cylindrical housing defining a sharpened needle point at the outboard-most end of said cylindrical housing; and

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said body wall; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of said cylindrical housing.

3. A surgical trocar spike for penetration through a body wall and into a bodily cavity, the spike comprising:

a cylindrical housing including an inboard end and an outboard open end, said cylindrical housing defining a sharpened needle point at the outboard-most end of said cylindrical housing; and

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of said cylindrical housing.

4. A surgical instrument introducible through a trocar, said trocar having an elongate tubular housing having a first open end portion for positioning through a body wall and a second open end portion for introduction and removal of auxiliary surgical devices therethrough while said open end portion is positioned through the body wall, said surgical instrument comprising:

a cylindrical housing including an inboard end and an outboard open end extendable through said second opposite open end of said trocar, said cylindrical housing defining an elliptical configuration terminating in a sharp needle point at the outboard-most end of said cylindrical housing;

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of said cylindrical housing.

5. A surgical instrument comprising:

an elongated trocar tubular housing having a first open end portion for positioning through a body wall and a second opposite open end portion for introduction and removal of auxiliary surgical devices therethrough while said first open end portion is positioned through the body wall; and

an elongate trocar spike assembly concentrically insertable through said second open end and comprising;

a cylindrical housing including an inboard end and an outboard open end extendable through said second opposite open end of said trocar housing, said cylindrical housing defining a sharp needle point at the outboard-most end of said cylindrical housing;

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending though said open end of said cylindrical housing.

6. A surgical instrument comprising:

an elongated trocar tubular housing having a first open end portion for positioning through a body wall and a second opposite open end portion for introduction and removal of auxiliary surgical devices therethrough while said first open end portion is positioned through the body wall; and

an elongate trocar spike assembly concentrically insertable through said second open end and comprising;

a cylindrical housing including an inboard end and an outboard open end extendable through said second opposite open end of said trocar housing, said cylindrical housing defining a sharp needle point at the outboard-most end of said cylindrical housing; and

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of said cylindrical housing.

7. A surgical trocar instrument for penetration through a body wall and into a bodily cavity the instrument comprising:

a cylindrical housing including an inboard end and an outboard open end, said cylindrical housing defining an elliptical configuration terminating in a sharp needle point at the outboard-most end of said cylindrical housing;

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said cavity away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said cavity; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a plow-shaped end extending though said open end of said cylindrical housing, said beveled, tissue-penetrating end comprising a plurality of face members terminating in a blunt nose portion and a rib element separating said contoured face members.

8. A surgical trocar spike for penetration through a body wall and into a bodily cavity, the trocar spike comprising:

a cylindrical housing including an inboard end and an outboard open end, said cylindrical housing defining a sharp needle point at the outboard-most end of said cylindrical housing; and

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending though said open end of said cylindrical housing, said tissue penetrating end comprising a plurality of face members terminating in a blunt nose portion and converging to define a rib element.

9. A surgical trocar spike for penetration through a body wall and into a body cavity, the spike comprising:

a cylindrical housing including an inboard end and an outboard open end extendable through said second opposite open end of said trocar housing, said cylindrical housing defining a sharp needle point at the outboard-most end of said cylindrical housing; and

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall wherein said coring prevention means includes a beveled, tissue penetrating end comprising a plurality of face members terminating in a blunt nose portion and converging to define a rib element.

10. A surgical instrument introducible through a trocar, said trocar having an elongate tubular housing having a first open end portion for positioning through a body wall and a second opposite open end portion for introduction and removal of auxiliary surgical devices therethrough while said first open end portion is positioned through the body wall, said surgical instrument comprising:

a cylindrical housing including an inboard end and an outboard open end extendable through said second opposite open end of said trocar housing, said cylindrical housing defining an elliptical configuration terminating in a sharp needle point at the outboard-most end of said cylindrical housing;

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending though said open end of said cylindrical housing, said beveled, tissue-penetrating end comprising a plurality of face members terminating in a blunt nose portion and converging to define a rib element.

11. A surgical instrument comprising:

an elongated trocar tubular housing having a first open end portion for positioning through a body wall and a second opposite open end portion for introduction and removal of auxiliary surgical devices therethrough while said first open end portion is positioned through the body wall; and

an elongate trocar spike assembly concentrically insertable thorough said second open end and comprising;

a cylindrical housing including an inboard end and an outboard open extendable through said second opposite open end of said trocar housing, said cylindrical housing defining a sharp needle point at the outboard-most end of said cylindrical housing;

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said solid material interior of said body wall; and

means for applying a concentric bias between said cylindrical housing and said coring prevention means, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of said cylindrical housing, said beveled, tissue-penetrating end comprising a plurality of face members terminating in a blunt nose portion and converging to define a rib element.

12. A surgical instrument comprising:

an elongated trocar tubular housing having a first open end portion for positioning through a body wall and a second opposite open end portion introduction and removal of auxiliary surgical devices therethrough while said first open end portion is positioned through the body wall;

an elongate trocar spike assembly concentrically insertable through said second open end and comprising;

a cylindrical housing including an inboard end and an outboard open end extendable through said second opposite open end of said trocar housing, said cylindrical housing defining a sharp needle point at the outboard-most end of said cylindrical housing; and

coring prevention means received within said cylindrical housing and biased for extension outboard of said needle point for urging solid material interior of said body wall away from said needle point and said open end of said cylindrical housing while said cylindrical housing is moved through said body wall, wherein said coring prevention means includes a beveled, tissue-penetrating end extending through said open end of cylindrical housing, said plow-shaped end comprising a plurality of face members terminating in a blunt nose portion and converging to define a rib element.