Automatic retractable safety penetrating instrument
First Claim
1. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in the body comprisingsleeve means 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 sleeve means ends;
- a penetrating member disposed in said lumen of said sleeve means and having a longitudinal axis and a sharp distal end for penetrating the cavity wall;
retracting means for moving said sharp distal end of said penetrating member proximally relative to said sleeve means from an extended position where said sharp distal end protrudes beyond said sleeve means distal end to a retracted position to prevent contact of said sharp distal end with tissue; and
locking and releasing means mounted for axial rotation relative to said penetrating member and about said longitudinal axis for automatically actuating said retracting means to move said sharp distal end of said penetrating member to the retracted position in response to axial rotation of said locking and releasing means automatically upon said sleeve means distal end entering the body cavity.
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Accused Products
Abstract
An automatic retractable safety penetrating instrument includes a sleeve for being introduced in a body cavity and a penetrating member disposed within the sleeve and having a sharp distal tip for penetrating a wall of the cavity. A retracting mechanism biases the penetrating member to a retracted position wherein the sharp distal tip is in a safe, protected position, and the penetrating member is movable distally from the retracted position to an extended position wherein the sharp distal tip extends beyond a distal end of the sleeve. The penetrating member is automatically locked against movement to the retracted position upon axial rotation of a locking and releasing mechanism in response to movement of the penetrating member to the extended position. An operating member is biased to move distally upon the sleeve distal end entering the body cavity such that the locking and releasing mechanism is axially rotated in response to distal movement of the operating member. Rotation of the locking and releasing mechanism upon the sleeve distal end entering the body cavity causes the penetrating member to be released for movement to the retracted position. Upon release of the penetrating member, the retracting mechanism automatically moves the penetrating member to the retracted position with the sharp distal tip in the safe, protected position. A method of establishing communication with an anatomical cavity utilizing an automatic retractable safety penetrating instrument including a sleeve and a penetrating member disposed in the sleeve includes the steps of forcing the automatic retractable safety penetrating instrument through tissue to enter the anatomical cavity and rotating a mechanism of the instrument about a longitudinal axis of the penetrating member to unlock the penetrating member causing movement of the penetrating member to a retracted position in response to entry of the automatic retractable safety penetrating instrument into the anatomical cavity.
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Citations
39 Claims
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1. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in the body comprising
sleeve means 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 sleeve means ends; -
a penetrating member disposed in said lumen of said sleeve means and having a longitudinal axis and a sharp distal end for penetrating the cavity wall; retracting means for moving said sharp distal end of said penetrating member proximally relative to said sleeve means from an extended position where said sharp distal end protrudes beyond said sleeve means distal end to a retracted position to prevent contact of said sharp distal end with tissue; and locking and releasing means mounted for axial rotation relative to said penetrating member and about said longitudinal axis for automatically actuating said retracting means to move said sharp distal end of said penetrating member to the retracted position in response to axial rotation of said locking and releasing means automatically upon said sleeve means distal end entering the body cavity. - View Dependent Claims (2, 3, 4, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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5. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in the body comprising
a 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 sleeve ends; -
a penetrating member disposed in said lumen of said sleeve and having a longitudinal axis and a sharp distal end for penetrating the cavity wall; retracting means for moving said sharp distal end of said penetrating member proximally relative to said sleeve from an extended position where said sharp distal end protrudes beyond said sleeve distal end to a retracted position to prevent contact of said sharp distal end with tissue, said retracting means including a retracting member for carrying said penetrating member and biasing means for biasing said retracting member in a proximal direction; locking and releasing means rotatable about said longitudinal axis for automatically actuating said retracting means to move said sharp distal end of said penetrating member to the retracted position in response to axial rotation of said locking and releasing means upon said sleeve distal end entering the body cavity, said locking and releasing means including means for preventing movement of said retracting member in the proximal direction in the extended position, said retracting member including a retraction plate having an opening therein receiving said locking and releasing means, said movement preventing means including protrusion means on said locking and releasing means for engaging said retraction plate in the extended position; and slot means in said retraction plate along said opening for being aligned with said protrusion means upon rotation of said locking and releasing means in response to said sleeve distal end entering the body cavity to permit movement of said retracting member in the proximal direction. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification