Trocar anchor
First Claim
1. A trocar access assembly for providing access to an internal worksite through an opening in tissue, the trocar access assembly comprising:
- an access member including an elastic anchor section and a self-adjusting sheath tube, the sheath tube being mounted to the anchor section and defining a lumen therethrough for reception of a surgical object, the sheath tube being movable between an initial position, where the sheath tube extends proximally from the anchor section and externally of the tissue, and an actuated position, where the sheath tube extends distally from the anchor section to be at least partially received within the opening in the tissue such that the sheath tube is at least partially positioned beneath the tissue, the anchor section being dimensioned and adapted to at least partially expand upon movement of the sheath tube to the actuated position to define an expanded segment adjacent the sheath tube, the expanded segment extending radially outwardly relative to the sheath tube and within the internal worksite to be in contacting engagement with internal tissue surfaces that form the opening, to thereby facilitate retention of the access member relative to the tissue.
2 Assignments
0 Petitions
Accused Products
Abstract
Apparatus and methods for providing access to a body cavity without substantial loss of inflation gas therein. The apparatus includes an access assembly that has a tubular member having a proximal end, a distal end, an elastic portion interposed the proximal end and the distal end, and a lumen therethrough. An anchor sleeve is disposed coaxially over the tubular member and has a radially expandable region. The anchor sleeve is moveable between an axially elongated configuration and an axially shortened configuration and is biased toward the axially shortened configuration by a force exerted by the elastic portion of the tubular member. The axially shortened configuration corresponds to the anchor sleeve being in the fully deployed position. Methods for providing anchored access to a cavity within a patient are also disclosed.
228 Citations
21 Claims
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1. A trocar access assembly for providing access to an internal worksite through an opening in tissue, the trocar access assembly comprising:
an access member including an elastic anchor section and a self-adjusting sheath tube, the sheath tube being mounted to the anchor section and defining a lumen therethrough for reception of a surgical object, the sheath tube being movable between an initial position, where the sheath tube extends proximally from the anchor section and externally of the tissue, and an actuated position, where the sheath tube extends distally from the anchor section to be at least partially received within the opening in the tissue such that the sheath tube is at least partially positioned beneath the tissue, the anchor section being dimensioned and adapted to at least partially expand upon movement of the sheath tube to the actuated position to define an expanded segment adjacent the sheath tube, the expanded segment extending radially outwardly relative to the sheath tube and within the internal worksite to be in contacting engagement with internal tissue surfaces that form the opening, to thereby facilitate retention of the access member relative to the tissue. - View Dependent Claims (2, 3, 4, 5)
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6. A surgical access assembly for providing access to an internal worksite through an opening in tissue, the surgical access assembly comprising:
an access member including an elastic anchor section and a self-adjusting sheath tube, the sheath tube extending from the anchor section and defining a lumen therethrough configured and dimensioned to receive a surgical instrument, the access member being repositionable during use between an initial position, wherein the anchor section is configured and dimensioned for positioning adjacent an outer surface of a patient'"'"'s tissue and the sheath tube extends proximally from the anchor section and externally of the tissue, and at least one subsequent position, wherein the sheath tube extends distally from the anchor section and beneath the tissue, wherein transitioning from the initial position to the at least one subsequent position creates a proximally directed biasing force in the anchor section whereby a contacting segment of the anchor section is defined, the contacting segment being configured and dimensioned to exert a proximally directed force on an inner surface of the tissue forming an opening to anchor the contacting portion and form a substantially fluid-tight seal between the self-adjusting sheath tube and the tissue. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An access assembly for providing access to an internal worksite through an opening in tissue, the access assembly comprising:
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an anchor section formed from a resilient material, the anchor section being configured and dimensioned for positioning adjacent an outer surface of the tissue; a self-adjusting sheath tube disposed concentrically within the anchor section and defining a lumen therethrough; and an obturator having proximal and distal ends and being removably positionable within the lumen of the sheath tube, the distal end of the obturator being engagable with a portion of the sheath tube whereby distal advancement of the obturator through the tissue facilitates expansion of the anchor section such that the anchor section is at least partially positioned within the opening and beneath the tissue such that the anchor section contacts internal tissue surfaces adjacent the opening to maintain positioning of the access assembly. - View Dependent Claims (18, 19, 20, 21)
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Specification