Trocar with safety shield
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 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 portal sleeve and having a sharp distal end for penetrating the cavity wall;
a safety shield disposed between said portal sleeve and said penetrating member and having a distal end protruding beyond the sharp distal end of the penetrating member;
retracting means for moving said penetrating member proximally relative to said portal sleeve from an extended position where said sharp distal end protrudes beyond said portal sleeve distal end to is a retracted position to prevent contact of said sharp distal end with tissue; and
trigger means for automatically actuating said retracting means to move said penetrating member to a retracted position in response to movement of said safety shield distally upon said portal sleeve distal end entering the body cavity whereby said sharp 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 with safety shield for introducing a portal sleeve into a cavity in the body includes a portal sleeve, a trocar disposed within the portal sleeve and a safety shield disposed between the portal sleeve and the trocar and having a distal end biased to protrude beyond a sharp distal end of the trocar. The trocar is supported in a manner to automatically move proximally from an extended position wherein the sharp distal end protrudes from the portal sleeve to a retracted position wherein the sharp distal end is protected within the retractable safety penetrating instrument in response to distal movement of the safety shield upon penetration into a cavity in the body. A retracting mechanism moves the trocar proximally and is normally locked in a position preventing proximal movement of the trocar and is released by distal movement of an operating member to trigger retraction of the trocar.
127 Citations
40 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 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 portal sleeve and having a sharp distal end for penetrating the cavity wall; a safety shield disposed between said portal sleeve and said penetrating member and having a distal end protruding beyond the sharp distal end of the penetrating member; retracting means for moving said penetrating member proximally relative to said portal sleeve from an extended position where said sharp distal end protrudes beyond said portal sleeve distal end to is a retracted position to prevent contact of said sharp distal end with tissue; and trigger means for automatically actuating said retracting means to move said penetrating member to a retracted position in response to movement of said safety shield distally upon said portal sleeve distal end entering the body cavity whereby said sharp distal end of said penetrating member is protected from inadvertent contact with tissue in the body cavity. - View Dependent Claims (2, 3)
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4. 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 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 portal sleeve and having a sharp distal end for penetrating the cavity wall and a hollow proximal end; a safety shield disposed between said portal sleeve and said penetrating member and having a distal end protruding beyond the sharp distal end of the penetrating member; retracting means for moving said penetrating member proximally relative to said portal sleeve from an extended position where said sharp distal end protrudes beyond said portal sleeve distal end to a retracted position to prevent contact of said sharp distal end with tissue, said retracting means including means for biasing said penetrating member in a proximal direction; means engageable with said retracting means for preventing movement of said penetrating member in the proximal direction; trigger means for automatically actuating said retracting means to move said penetrating member to a retracted position in response to movement of said safety shield distally upon said portal sleeve distal end entering the body cavity whereby said sharp distal end of said penetrating member is protected from inadvertent contact with tissue in the body cavity, said trigger means including means for automatically disengaging said movement preventing means; and hub means for mounting said proximal end of said penetrating member and cylindrical member means secured to said hub means and extending into said penetrating member proximal end for guiding proximal movement of said penetrating member. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. 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 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 portal sleeve and having a sharp distal end for penetrating the cavity wall; a safety shield disposed between said portal sleeve and said penetrating member and having a distal end protruding beyond said sharp distal end of said penetrating member; retracting means for moving said safety shield and penetrating member proximally relative to said portal sleeve from an extended position where said distal ends of said safety shield and penetrating member protrude beyond said portal sleeve distal end to a retracted position within said portal sleeve; and trigger means including an operating member movable proximally as said penetrating member penetrates the cavity wall and movable distally thereafter, said trigger means being responsive to said distal movement of said operating member to actuate said retracting means to move said safety shield and penetrating member to said retracted position. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. 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 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 exteriorly of the body cavity and a lumen extending between said distal and proximal ends; -
a penetrating member disposed in said lumen of said portal sleeve and having a sharp distal end for penetrating the cavity wall; a safety shield disposed in said lumen of said portal sleeve between said portal sleeve and said penetrating member and having a distal end; means for biasing said safety shield distally within said lumen of said portal sleeve to an extended position where said safety shield distal end protrudes beyond said sharp distal end of said penetrating member; retracting means for moving said penetrating member proximally relative to said portal sleeve to a retracted position within said retractable safety penetrating instrument in response to distal movement of said safety shield upon penetration into the body cavity; and trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said safety shield distally upon said portal sleeve distal end entering the body cavity whereby said penetrating member is moved to said retracted position prior to said safety shield distal end protruding beyond said sharp distal end of said penetrating member. - View Dependent Claims (37, 38, 39)
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40. 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 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 exteriorly of the body cavity and a lumen extending between said distal and proximal ends; -
a penetrating member disposed in said lumen of said portal sleeve and having a sharp distal end for penetrating the cavity wall; a safety shield disposed in said lumen of said portal sleeve between said portal sleeve and said penetrating member and having a distal end; means for biasing said safety shield distally within said lumen of said portal sleeve to an extended position where said safety shield distal end protrudes beyond said sharp distal end of said penetrating member; retracting means for moving said penetrating member proximally relative to said portal sleeve to a retracted position within said retractable safety penetrating instrument in response to distal movement of said safety shield upon penetration into the body cavity; trigger means for automatically actuating said retracting means to move said penetrating member to said retracted position in response to movement of said safety shield distally upon said portal sleeve distal end entering the body cavity whereby said penetrating member to moved to said retracted position prior to said safety shield protruding beyond said sharp distal end of said penetrating member; means for selectively moving said penetrating member form said retracted position to said extended position; hub means for mounting said penetrating member and wherein said means for selectively moving includes knob means on said penetrating member and slot means in said hub means for receiving said knob means, said knob means being movable along said slot means to move said penetrating member form said retracted position to said extended position; and means for selectively locking said penetrating member in said extended position, said means for locking including a locking member pivotally mounted on said hub means for being selectively moved into a position preventing proximal movement of said knob means along said slot means.
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Specification