Safety penetrating instrument with penetrating member protected after penetration to predetermined depth
First Claim
1. A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprisinga cannula having a distal end for introduction in the anatomical cavity, a proximal end for being disposed externally of the anatomical cavity and a lumen between said distal and proximal ends of said cannula;
- a penetrating member disposed in said lumen of said cannula and having a distal end for penetrating the anatomical cavity wall;
protection means for placing said safety penetrating instrument in a protected state where said distal end of said penetrating member is in a protected, non-exposed position; and
trigger means proximally movable during penetration of the anatomical cavity wall for triggering said protection means to place said safety penetrating instrument in said protected state upon said trigger means moving proximally a predetermined distance whereby, when said predetermined proximal distance corresponds to the thickness of the anatomical cavity wall, said safety penetrating instrument will be placed in said protected state when said portal sleeve distal end enters the anatomical cavity.
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Accused Products
Abstract
A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity includes a cannula having a distal end for introduction in the anatomical cavity, a penetrating member disposed in the cannula and having a distal end for penetrating the anatomical cavity wall protection means for placing the safety penetrating instrument in a protected state where the penetrating member distal end is protected and not exposed and trigger means proximally movable during penetration of the anatomical cavity wall for triggering the protection means to place the safety penetrating instrument in the protected state upon the trigger means moving a predetermined proximal distance. Where the predetermined proximal distance corresponds to the thickness of the anatomical cavity wall, the safety penetrating instrument will be placed in the protected state upon introduction of the cannula distal end in the anatomical cavity. A method of forming a portal in an anatomical cavity wall includes the steps of penetrating the anatomical cavity wall with a safety penetrating instrument and triggering the safety penetrating instrument to move to a protected state where a penetrating member of the safety penetrating instrument is protected upon movement of a trigger member of the safety penetrating instrument a predetermined proximal distance corresponding to the thickness of the anatomical cavity wall.
111 Citations
27 Claims
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1. A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprising
a cannula having a distal end for introduction in the anatomical cavity, a proximal end for being disposed externally of the anatomical cavity and a lumen between said distal and proximal ends of said cannula; -
a penetrating member disposed in said lumen of said cannula and having a distal end for penetrating the anatomical cavity wall; protection means for placing said safety penetrating instrument in a protected state where said distal end of said penetrating member is in a protected, non-exposed position; and trigger means proximally movable during penetration of the anatomical cavity wall for triggering said protection means to place said safety penetrating instrument in said protected state upon said trigger means moving proximally a predetermined distance whereby, when said predetermined proximal distance corresponds to the thickness of the anatomical cavity wall, said safety penetrating instrument will be placed in said protected state when said portal sleeve distal end enters the anatomical cavity. - View Dependent Claims (2, 3, 4, 5)
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6. A safety penetrating instrument for penetrating an anatomical cavity wall to gain access to an anatomical cavity comprising
a cannula having a distal end for introduction in the anatomical cavity, a proximal end and a lumen between said distal and proximal ends of said cannula; -
a penetrating member disposed in said lumen of said cannula and having a distal end for penetrating the anatomical cavity wall; retracting means for moving said penetrating member proximally from an extended position where said penetrating member distal end is disposed distally of said cannula distal end to a retracted position where said penetrating member distal end is disposed within said cannula distal end; locking means for locking said penetrating member in said extended position; and a trigger member movable a predetermined proximal distance during penetration of the anatomical cavity wall for triggering release of said locking means to permit said retracting means to move said penetrating member from said extended position to said retracted position, said predetermined distance corresponding to the thickness of the anatomical cavity wall to allow said penetrating member to be moved to said retracted position upon introduction of said cannula distal end in the anatomical cavity. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A method of forming a portal in the wall of an anatomical cavity comprising the steps of
penetrating the anatomical cavity wall with a penetrating member of a safety penetrating instrument having a protective state where the penetrating member is protected and a trigger member movable proximally a proximal distance corresponding to the thickness of the anatomical cavity wall; - and
triggering the safety penetrating instrument to move to the protective state when the trigger member has moved the proximal distance. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21)
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22. A method of penetrating tissue comprising the steps of
penetrating the tissue with the distal end of a penetrating member of a safety penetrating instrument including a cannula receiving the penetrating member and adapted to remain in the tissue after the penetrating member is withdrawn from the cannula; - and
triggering the safety penetrating instrument to move the safety penetrating instrument to a protective state where the penetrating member is protected as soon as a trigger member of the safety penetrating instrument has moved proximally a distance corresponding to a desired predetermined depth of penetration by the safety penetrating instrument into the tissue. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification