Retractable safety penetrating instrument for portal sleeve introduction
First Claim
1. A retractable safety penetrating instrument for forming a portal communicating with a cavity in the body to allow passage of instruments for performing least invasive medical procedures comprisinga hollow portal sleeve for providing a passage through a cavity wall and having a distal end for positioning in the body cavity, a proximal end for positioning externally of the body cavity and a lumen extending between said distal and proximal ends;
- a penetrating member disposed in said lumen of said sleeve and having a distal end for penetrating the cavity wall;
means for biasing said penetrating member distally within said lumen of said sleeve to an extended position where said penetrating member distal end protrudes beyond said sleeve distal end;
retracting means for moving said penetrating member proximally relative to said sleeve from said extended position to a retracted position to prevent contact of said penetrating member distal end with tissue;
trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said penetrating member distally within said lumen of said sleeve;
means for selectively moving said penetrating member from said retracted position to said extended position, said means for selectively moving including a knob on said penetrating member, a hub mounting said penetrating member and a slot in said hub for receiving said knob, said knob being movable along said slot to move said penetrating member from said retracted position to said extended position; and
means for selectively locking said penetrating member in said extended position for preventing proximal movement of said penetrating member.
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Accused Products
Abstract
A retractable safety penetrating instrument for introducing a portal sleeve into a cavity in the body includes a portal sleeve and a penetrating member disposed within the portal sleeve and supported in a manner to automatically move proximally from an extended position wherein a sharp distal end of the penetrating member protrudes from the portal sleeve to a retracted position wherein the sharp distal end of the penetrating member is protected in response to distal movement of the retractable safety penetrating instrument upon penetration into a cavity in the body. A retracting mechanism moves the penetrating member proximally and is normally locked in a position preventing proximal movement of the penetrating member and is released by distal movement of an operating member to trigger retraction of the penetrating member.
75 Citations
2 Claims
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1. A retractable safety penetrating instrument for forming a portal communicating with a cavity in the body to allow passage of instruments for performing least invasive medical procedures comprising
a hollow portal sleeve for providing a passage through a cavity wall and having a distal end for positioning in the body cavity, a proximal end for positioning externally of the body cavity and a lumen extending between said distal and proximal ends; -
a penetrating member disposed in said lumen of said sleeve and having a distal end for penetrating the cavity wall; means for biasing said penetrating member distally within said lumen of said sleeve to an extended position where said penetrating member distal end protrudes beyond said sleeve distal end; retracting means for moving said penetrating member proximally relative to said sleeve from said extended position to a retracted position to prevent contact of said penetrating member distal end with tissue; trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said penetrating member distally within said lumen of said sleeve; means for selectively moving said penetrating member from said retracted position to said extended position, said means for selectively moving including a knob on said penetrating member, a hub mounting said penetrating member and a slot in said hub for receiving said knob, said knob being movable along said slot to move said penetrating member from said retracted position to said extended position; and means for selectively locking said penetrating member in said extended position for preventing proximal movement of said penetrating member. - View Dependent Claims (2)
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Specification