Automatic retractable trocar with safety shield and method of use
First Claim
1. A method of forming a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps ofpenetrating the cavity wall with a sharp tip of a penetrating member disposed within a portal sleeve to position a distal end of the portal sleeve within the cavity;
- automatically extending a safety shield to an extended position with a distal end of the safety shield protecting the sharp tip of the penetrating member and protruding beyond the distal end of the portal sleeve a distance corresponding to a size of a potential space to be formed between the tissue and the cavity wall; and
contacting the tissue with the distal end of the safety shield to move the tissue away from the cavity wall to form a space having a size between the tissue and the cavity wall corresponding to the distance.
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Accused Products
Abstract
An automatic retractable safety trocar instrument includes a portal sleeve, a trocar disposed within the portal sleeve and a safety shield disposed between the portal sleeve and the trocar. The trocar is movable automatically from an operative position wherein a sharp distal end of the trocar protrudes from the portal sleeve to a retracted position wherein the sharp distal end is protected within the instrument upon penetration into a cavity in the body. The safety shield is automatically movable proximally from an extended position during penetration of tissue and distally toward the extended position upon introduction of a distal end of the portal sleeve in an anatomical cavity such that a distal end of the safety shield contacts tissue within the cavity and moves the tissue away from the cavity wall. A method of creating a space between a wall of an anatomical cavity and a layer of tissue within the cavity includes penetrating the cavity wall with the sharp tip of a penetrating member disposed within a portal sleeve to position a distal end of the portal sleeve within the cavity and extending a safety shield to protrude beyond the sharp tip and the cavity wall whereby a blunt distal end of the safely shield moves the tissue away from the wall maintaining a space between the tissue and the wall.
141 Citations
60 Claims
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1. A method of forming a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
penetrating the cavity wall with a sharp tip of a penetrating member disposed within a portal sleeve to position a distal end of the portal sleeve within the cavity; -
automatically extending a safety shield to an extended position with a distal end of the safety shield protecting the sharp tip of the penetrating member and protruding beyond the distal end of the portal sleeve a distance corresponding to a size of a potential space to be formed between the tissue and the cavity wall; and contacting the tissue with the distal end of the safety shield to move the tissue away from the cavity wall to form a space having a size between the tissue and the cavity wall corresponding to the distance. - View Dependent Claims (2, 3, 4)
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5. A method of maintaining a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
penetrating the cavity wall with a sharp tip of a penetrating member disposed within a portal sleeve to position a distal end of the portal sleeve within the cavity; -
automatically extending a safety shield to protrude beyond the sharp tip of the penetrating member and the cavity wall upon positioning of the portal sleeve distal end within the cavity; and contacting the layer of tissue with the blunt end of the safety shield and moving the tissue away from the wall with the blunt end of the safety shield in response to automatic extension of the safety shield to maintain a space between the tissue and the wall. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A retractable safety penetrating instrument for penetration into an anatomical cavity comprising
a portal sleeve having a distal end and a proximal end; -
a penetrating member slidably disposed in said portal sleeve and having a sharp distal end for penetrating tissue; a safety shield disposed between said portal sleeve and said penetrating member and having a distal end; retracting means for automatically moving said sharp distal end from an operative position wherein said sharp distal end protrudes beyond said portal sleeve distal end to a retracted, protected position wherein said sharp distal end is disposed proximally of said operative position in response to penetration of said portal sleeve distal end into an anatomical cavity; and extending means for automatically extending said safety shield to an extended position wherein said safety shield distal end protrudes beyond said portal sleeve distal end in response to penetration of said portal sleeve distal end into the anatomical cavity. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A retractable safety penetrating instrument for forming a portal communicating with a cavity in the body to allow passage of instruments for penetrating 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; retracting means for moving said penetrating member proximally relative to said portal sleeve from an operative position wherein 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; a safety shield disposed between said portal sleeve and said penetrating member and having a distal end normally protruding distally beyond the distal end of the portal sleeve, said safety shield being movable proximally from the normally protruding position during penetration of the cavity wall and movable distally thereafter toward the normally protruding position; and trigger means for automatically actuating said retracting means to move said penetrating member to the retracted position in response to distal movement of said safety shield, relative to said portal sleeve, upon said portal sleeve distal end entering the body cavity. - View Dependent Claims (28, 29)
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30. A method of maintaining a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
biasing a safety shield to normally protrude beyond a sharp tip of a penetrating member disposed within a portal sleeve; -
moving the safety shield against the bias to expose the sharp tip of the penetrating member, said step of moving including forcing the safety shield against the cavity wall to overcome the bias with a force from the cavity wall and limiting movement of the safety shield against the bias, said step of limiting including preventing further movement of the safety shield against the bias upon alignment of the safety shield with a distal end of the portal sleeve; penetrating the cavity wall with the sharp tip of the penetrating member to position the distal end of the portal sleeve within the cavity; and automatically extending the safety shield to protrude beyond the sharp tip of the penetrating member and the cavity wall upon positioning of the portal sleeve distal end within the cavity whereby a blunt distal end of the safety shield contacts the layer of tissue and moves the tissue away from the wall maintaining a space between the tissue and the wall.
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31. A method of maintaining a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
biasing a safety shield to normally protrude beyond a sharp tip of a penetrating member disposed within a portal sleeve; -
moving the safety shield against the bias to expose the sharp tip of the penetrating member, said step of moving including forcing the safety shield against the cavity wall to overcome the bias with a force from the cavity wall and limiting movement of the safety shield against the bias, said step of limiting including preventing further movement of the safety shield against the bias upon alignment of the safety shield with a distal end of the penetrating member; penetrating the cavity wall with the sharp tip of the penetrating member to position a distal end of the portal sleeve within the cavity; and automatically extending the safety shield to protrude beyond the sharp tip of the penetrating member and the cavity wall upon positioning of the portal sleeve distal end within the cavity whereby a blunt distal end of the safety shield contacts the layer of tissue and moves the tissue away from the wall maintaining a space between the tissue and the wall.
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32. A method of maintaining a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
biasing a safety shield disposed within a portal sleeve to normally protrude beyond a sharp tip of a penetrating member received in a lumen of the safety shield; -
moving the safety shield against the bias to expose the sharp tip of the penetrating member, said step of moving including forcing the safety shield against the cavity wall to overcome the bias with a force from the cavity wall; penetrating the cavity wall with the sharp tip of the penetrating member to position a distal end of the portal sleeve within the cavity; automatically extending the safety shield to protrude beyond the sharp tip of the penetrating member and the cavity wall upon positioning of the portal sleeve distal end within the cavity whereby a blunt distal end of the safety shield contacts the layer of tissue and moves the tissue away from the wall maintaining a space between the tissue and the wall, said step of automatically extending includes moving the safety shield toward the normally protruding position with the bias upon removal of the force from the cavity wall; and completely withdrawing the penetrating member from the lumen of the safety shield leaving the distal end of the safety shield within the anatomical cavity. - View Dependent Claims (33, 34, 35)
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36. A method of maintaining a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
penetrating the cavity wall with a sharp tip of a penetrating member disposed within a portal sleeve to position a distal end of the portal sleeve within the cavity; -
automatically retracting the penetrating member to a safety protected position wherein the sharp tip is not exposed within the anatomical cavity upon positioning of the portal sleeve distal end within the cavity; and automatically extending a safety shield to protrude beyond the sharp tip of the penetrating member and the cavity wall upon positioning of the portal sleeve distal end within the cavity whereby a blunt distal end of the safety shield contacts the layer of tissue and moves the tissue away from the wall maintaining a space between the tissue and the wall. - View Dependent Claims (37, 38)
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39. A method of forming a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
biasing a safety shield disposed between a portal sleeve and a penetrating member to an extended position wherein a distal end of the safety shield protects a sharp tip of the penetrating member and protrudes beyond a distal end of the portal sleeve a distance corresponding to a size of a potential space to be formed between the tissue and the cavity wall; -
moving the safety shield to a retracted position against the bias to expose the sharp tip of the penetrating member, said step of moving including aligning the distal end of the safety shield with the penetrating member and the portal sleeve to create a substantially smooth profile with the penetrating member and the distal end of the portal sleeve, and wherein the penetrating member includes a trocar having a conical distal end proximally joined to a cylindrical neck at a junction and a conical shoulder proximally joining the neck to a trocar body and the safety shield includes a conical distal end having an angular inner surface segment and a cylindrical inner surface segment extending distally from the angular inner surface segment to a distal peripheral edge, said step of aligning including positioning the angular inner surface segment to extend along the conical trocar shoulder, the cylindrical inner surface segment to extend along the trocar neck and the distal peripheral edge at the junction; penetrating the cavity wall with the sharp tip of the penetrating member to position the distal end of the portal sleeve within the cavity; automatically extending the safety shield to the extended position; and contacting the tissue with the distal end of the safety shield to move the tissue away from the cavity wall to form a space having a size between the tissue and the cavity wall corresponding to the distance.
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40. A method of forming a space between a wall of an anatomical cavity and a layer of tissue within the cavity comprising the steps of
biasing a safety shield disposed between a portal sleeve and a penetrating member to an extended position with a distal end of the safety shield protecting a sharp tip of the penetrating member and protruding beyond a distal end of the portal sleeve a distance corresponding to a size of a potential space to be formed between the tissue and the cavity wall; -
moving the safety shield to a retracted position against the bias to expose the sharp tip of the penetrating member, the penetrating member being movable between a retracted position with the sharp tip disposed within the portal sleeve and an operative position with the sharp tip disposed beyond the distal end of the portal sleeve; setting the penetrating member in the operative position; penetrating the cavity wall with the sharp tip of the penetrating member to position the distal end of the portal sleeve within the cavity; automatically extending the safety shield to the extended position; and contacting the tissue with the distal end of the safety shield to move the tissue away from the cavity wall to form a space having a size between the tissue and the cavity wall corresponding to the distance. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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Specification