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 and a hollow proximal end;
a hub mounting said proximal end of said penetrating member and having proximal wall;
retracting means for moving said penetrating member proximally relative to said sleeve from an extended position where said penetrating member distal end protrudes beyond said sleeve distal end to a retracted position to prevent contact of said penetrating member distal end with tissue, said retracting means including means for biasing said penetrating member in a proximal direction;
a guide tube secured to said hub and extending from said hub proximal wall into said penetrating member proximal end for guiding proximal movement of said penetrating member therealong; and
trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said retractable safety penetrating instrument distally upon said sleeve distal end entering the body cavity whereby said distal end of said penetrating member is protected from inadvertent contact with tissue in the body cavity.
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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.
86 Citations
27 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 and a hollow proximal end; a hub mounting said proximal end of said penetrating member and having proximal wall; retracting means for moving said penetrating member proximally relative to said sleeve from an extended position where said penetrating member distal end protrudes beyond said sleeve distal end to a retracted position to prevent contact of said penetrating member distal end with tissue, said retracting means including means for biasing said penetrating member in a proximal direction; a guide tube secured to said hub and extending from said hub proximal wall into said penetrating member proximal end for guiding proximal movement of said penetrating member therealong; and trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said retractable safety penetrating instrument distally upon said sleeve distal end entering the body cavity whereby said distal end of said penetrating member is protected from inadvertent contact with tissue in the body cavity. - View Dependent Claims (2, 6, 7, 8, 9, 10, 13, 15, 16)
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3. 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 and a hollow proximal end; a hub mounting said proximal end of said penetrating member, said hub including cylindrical member means extending into said penetrating member proximal end for guiding proximal movement of said penetrating member; retracting means for moving said penetrating member proximally relative to said sleeve from an extended position where said penetrating member distal end protrudes beyond said sleeve distal end to a retracted position to prevent contact of said penetrating member distal end with tissue, said retracting means including means for biasing said penetrating member in a proximal direction, said biasing means including a spring disposed within said penetrating member proximal end concentrically around said cylindrical member means; and trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said retractable safety penetrating instrument distally upon said sleeve distal end entering the body cavity whereby said distal end of said penetrating member is protected from inadvertent contact with tissue in the body cavity. - View Dependent Claims (4, 5)
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11. 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, said distal end of said portal sleeve including a peripheral edge; -
a penetrating member disposed in said lumen of said sleeve and having a distal end for penetrating the cavity wall and a proximal end, said distal end of said penetrating member including an end surface tapering to a sharp tip and a cylindrical body joined to said end surface at a junction; a hub mounting said proximal end of said penetrating member; means for biasing said penetrating member distally in said lumen of said sleeve to an extended position where said distal end of said penetrating member is disposed distally of said sleeve distal end and for allowing proximal movement of said penetrating member relative to said sleeve against said distal bias in response to a proximal force from tissue contact at said distal end of said penetrating member during penetration of the cavity wall; retracting means for automatically moving said penetrating member proximally relative to said sleeve to a retracted position to prevent contact of said distal end of said penetrating member with tissue in response to movement of said penetrating member distally by said distal bias upon removal of the proximal force from tissue contact upon entry into the anatomical cavity; and a stop disposed at said proximal end of said penetrating member for limiting proximal movement of said penetrating member against said distal bias, said junction being aligned with said peripheral edge when said penetrating member moves proximally against said distal bias, as limited by said stop, in response to a proximal force from tissue contact at said distal end of said penetrating member to present a substantially smooth profile during penetration of the cavity wall. - View Dependent Claims (12, 14, 17, 18, 24, 25, 26, 27)
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- 19. A retractable safety penetrating instrument as recited in claim 176 wherein said latch includes a spring.
Specification