Surgical trocar and spike assembly
First Claim
Patent Images
1. A surgical trocar 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;
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 an elliptical configuration terminating in 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 plow-shaped end extending through said open end of said cylindrical housing.
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Accused Products
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.
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Citations
23 Claims
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1. A surgical trocar 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;
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 an elliptical configuration terminating in 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 plow-shaped end extending through said open end of said cylindrical housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 11)
- 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;
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8. A surgical trocar 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;
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; 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 through said open end of said cylindrical housing.
- 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;
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9. A surgical trocar instrument, comprising:
- an elongated trocar 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;
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 plow-shaped end extending through said open end of said cylindrical housing.
- an elongated trocar 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;
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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 open end portion for introduction and removal of auxiliary surgical therethrough while said first open end portion is positioned through the body wall, said 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 for 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 an elliptical configuration terminating in 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 plow-shaped end extending through said open end of said cylindrical housing. - View Dependent Claims (12, 13, 14, 15, 16, 17)
- an elongated trocar tubular housing having a first open end portion for positioning through a body wall and a second opposite open end for introduction and removal of auxiliary surgical devices therethrough while said first open end portion is positioned through the body wall;
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18. The 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;
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; 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 through said open end of said cylindrical housing.
- 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;
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19. 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;
an elongate trocar spike assembly concentrically insertable through said second open end and comprising a cylindrical housing 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 plow-shaped end extending through said open end of said cylindrical housing.
- 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;
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20. A surgical trocar 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;
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 an elliptical configuration terminating in 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, the bias on said coring prevention means being overcome to move said coring prevention means inwardly relative to said cylindrical housing and away from said needle point by introduction of said cylindrical housing through said body wall said bias moving said coring prevention means toward said needle point and positioning said coring prevention means outboard of said needle point subsequent to introduction through said body wall, and further including means positioned around the inboard end of said cylindrical housing for hand positioning of said cylindrical housing through said trocar housing, including locking means defined on said coring prevention means and said means defined around the inboard end of said cylindrical housing, for locking interengagement therebetween, said means positionable around the inboard end defining a bore therethrough for receipt of indicating end members of said locking means when the bias on said coring prevention means is overcome and said coring prevention means is moved inwardly relative to said cylindrical housing.
- 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;
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21. A surgical trocar 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;
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; and
means for applying a concentric bias between said cylindrical housing and said coring prevention means, the bias on said coring prevention means being overcome to move said coring prevention means inwardly relative to said cylindrical housing and away from said needle point by introduction of said cylindrical housing through said body wall, said bias moving said coring prevention means toward said needle point and positioning said coring prevention means outboard of said needle point subsequent to introduction through said body wall, and further including means positioned around the inboard end of said cylindrical housing for hand positioning of said cylindrical housing through said trocar housing, including locking means defined on said coring prevention means and said means defined around the inboard end of said cylindrical housing, for locking interengagement therebetween, said means positionable around the inboard end defining a bore therethrough for receipt of indicating end members of said locking means when the bias on said coring prevention means is overcome and said coring prevention means is moved inwardly relative to said cylindrical housing.
- 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;
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22. A surgical trocar 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;
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, the bias on said coring prevention means being overcome to move said coring prevention means inwardly relative to said cylindrical housing and away from said tip by introduction of said cylindrical housing through said body wall, said bias moving said coring prevention means toward said needle point and positioning said coring prevention means outboard of said needle point subsequent to introduction through said body wall, and further including means positioned around the inboard end of said cylindrical housing for hand positioning of said cylindrical housing through said trocar housing, including locking means defined on said coring prevention means and said means defined around the inboard end of said cylindrical housing, for locking interengagement therebetween, said means positionable around the inboard end defining a bore therethrough for receipt of indicating end members of said locking means when the bias on said coring prevention means is overcome and said coring prevention means is moved inwardly relative to said cylindrical housing.
- 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;
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23. 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 first open end portion is positioned through the body wall, said 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;
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 an elliptical configuration terminating in a sharp needlepoint 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, the bias on said coring prevention means being overcome to move said coring prevention means inwardly relative to said cylindrical housing and away from said needle point by introduction of said cylindrical housing through said body wall, said bias moving said coring prevention means toward said needle point and positioning said coring prevention means outboard of said, needle point subsequent to introduction through said body wall, and further including means positioned around the inboard end of said cylindrical housing for hand positioning of said cylindrical housing through said trocar housing, including locking means defined on said coring prevention means and said means defined around the inboard end of said cylindrical housing, for locking interengagement therebetween, said means positionable around the inboard end defining a bore therethrough for receipt of indicating end members of said locking means when the bias on said coring prevention means is overcome and said coring prevention means is moved inwardly relative to said cylindrical housing.
- 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;
Specification