Automatic retractable safety penetrating instrument for portal sleeve introduction
First Claim
1. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in a body comprisinga sleeve for providing a passage through a cavity wall and having a distal end for positioning in a body cavity, a proximal end for positioning externally of the body cavity and a lumen between said distal and proximal ends;
- a penetrating member disposed in said lumen and having a distal end for penetrating the cavity wall;
a retracting mechanism coupled with said penetrating member for biasing said distal end of said penetrating member to move proximally relative to said sleeve from a penetrating member extended position wherein said distal end of said penetrating member protrudes distally beyond said distal end of said sleeve to a penetrating member retracted position wherein said distal end of said penetrating member is disposed in said sleeve;
a probe disposed within said penetrating member and having a distal end;
means for biasing said probe distally relative to said penetrating member to a probe extended position wherein said distal end of said probe protrudes distally beyond said distal end of said sleeve, said means for biasing permitting said probe to move proximally relative to said penetrating member from said probe extended position to a probe retracted position in response to resistance of the cavity wall during penetrating and causing said probe to move distally from said probe retracted position towards said probe extended position upon entry of said distal end of said sleeve in the body cavity; and
a locking and releasing mechanism locking said penetrating member in said penetrating member extended position and automatically releasing said penetrating member to be moved by said retracting mechanism from said penetrating member extended position to said penetrating member retracted position in response to distal movement of said probe from said probe retracted position toward said probe extended position.
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Accused Products
Abstract
An automatic 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.
150 Citations
19 Claims
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1. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in a body comprising
a sleeve for providing a passage through a cavity wall and having a distal end for positioning in a body cavity, a proximal end for positioning externally of the body cavity and a lumen between said distal and proximal ends; -
a penetrating member disposed in said lumen and having a distal end for penetrating the cavity wall; a retracting mechanism coupled with said penetrating member for biasing said distal end of said penetrating member to move proximally relative to said sleeve from a penetrating member extended position wherein said distal end of said penetrating member protrudes distally beyond said distal end of said sleeve to a penetrating member retracted position wherein said distal end of said penetrating member is disposed in said sleeve; a probe disposed within said penetrating member and having a distal end; means for biasing said probe distally relative to said penetrating member to a probe extended position wherein said distal end of said probe protrudes distally beyond said distal end of said sleeve, said means for biasing permitting said probe to move proximally relative to said penetrating member from said probe extended position to a probe retracted position in response to resistance of the cavity wall during penetrating and causing said probe to move distally from said probe retracted position towards said probe extended position upon entry of said distal end of said sleeve in the body cavity; and a locking and releasing mechanism locking said penetrating member in said penetrating member extended position and automatically releasing said penetrating member to be moved by said retracting mechanism from said penetrating member extended position to said penetrating member retracted position in response to distal movement of said probe from said probe retracted position toward said probe extended position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An automatic retractable safety penetrating instrument for introducing a sleeve into a cavity in a body comprising
a sleeve for providing a passage through a cavity wall and having a distal end for positioning in a body cavity, a proximal end for positioning externally of the body cavity and a lumen between said distal and proximal ends; -
a penetrating member disposed in said lumen and having a distal end for penetrating the cavity wall; a retracting mechanism biasing said distal end of said penetrating member to move proximally relative to said sleeve from a penetrating member extended position wherein said distal end of said penetrating member protrudes distally beyond said distal end of said sleeve to a penetrating member retracted position wherein said distal end of said penetrating member is disposed in said sleeve; a probe disposed within said penetrating member and having a distal end; means for biasing said probe distally relative to said penetrating member to a probe extended position wherein said distal end of said probe protrudes distally beyond said distal end of said sleeve, said means for biasing permitting said probe to move proximally relative to said penetrating member from siad probe extended position to a probe retracted position in response to resistance of the cavity wall during penetration and causing said probe to move distally from said probe retracted position toward said probe extended position upon entry of said distal end of said sleeve in the body cavity; a locking and releasing mechanism locking said penetrating member in said penetrating member extended position and releasing said penetrating member to be moved by said retracting mechanism from said penetrating member extended position to said penetrating member retracted position; a trigger triggering said locking and releasing mechanism to release said penetrating member for movement by said retracting mechanism from said penetrating member extended position to said penetrating member retracted position automatically in response to movement of said probe from said probe retracted position toward said probe extended position. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for introducing a sleeve of an automatic retractable safety penetrating instrument into a cavity in a body comprising the steps of
contacting a wall of the body cavity with the distal end of a probe causing the probe to move proximally relative to the sleeve of the automatic retractable safety penetrating instrument; -
penetrating the cavity wall with the distal end of a penetrating member disposed within the sleeve and having a lumen receiving the probe; entering the body cavity with the distal end of the sleeve; biasing the probe to cause the probe to move distally in response to entry of the distal end of the sleeve in the body cavity; automatically retracting the penetrating member to move the distal end of the penetrating member proximally into the sleeve in response to distal movement of the probe upon the distal end of the sleeve entering the body cavity. - View Dependent Claims (16, 17, 18, 19)
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Specification