Method for anchoring and sealing a cannula assembly to the body of a patient
AssigneeApollo Camera, LLC
InventorsJohn I. Shipp, Jeffrey White
Life of this patent
Estimating the term…
Abstract
A cannula assembly for use in laproscopic surgery includes a cannula having a proximal end for use in orientating the assembly into an abdominal cavity, a distal end for insertion into a patient, and a passage through which surgical instruments can be inserted. An expandable feature in the form of an anchor is located toward the distal end of the cannula and is selectively expandable and collapsible. The feature in its expanded state prevents withdrawal of the cannula. A collar is pushed distally until it releasably cinches to the outside of the abdominal cavity thereby creating an airtight seal and stabilizing the assembly. The collar has a friction fit with the cannula designed to prevent excessive force against the cavity walls.
Claims19
A cannula assembly having a proximal end, a distal end, and a longitudinal axis passing through the proximal and distal ends, said cannula assembly comprising:
- an inner sleeve having an interior surface and an exterior surface;
- an outer sleeve having an interior surface adapted for slidable engagement with said exterior surface of said inner sleeve, said outer sleeve being fixedly attached to said inner sleeve away from the proximal end of said cannula assembly, said outer sleeve including a movable portion defined intermediate the proximal end and the distal end, a stationary portion distal of said movable portion, an exterior surface, and an anchor defined on said exterior surface, said anchor, upon movement of said movable portion toward the distal end into contact with said stationary portion, being radially expandable from a retracted position along the longitudinal axis to an expanded position to anchor said cannula assembly to a patient;
- and
- a collar having an internal surface adapted to form a friction fit with said exterior surface of said outer sleeve to permit said collar to move the movable portion of said outer sleeve relative to said inner sleeve toward the distal end and move said anchor from the retracted position to the expanded position when said collar is moved toward the distal end, the friction fit being configured, after said anchor is expanded to the expanded position, to prevent said collar from moving relative to said outer sleeve toward the proximal end.
A cannula assembly having a proximal end, a distal end, and a longitudinal axis passing through the proximal and distal ends, said cannula assembly comprising:
- an inner sleeve having an interior surface and an exterior surface;
- an outer sleeve having an interior surface adapted for slidable engagement with said exterior surface of said inner sleeve, said outer sleeve being joined to said inner sleeve away from the proximal end of said cannula assembly, said outer sleeve including a movable portion defined intermediate the proximal end and the distal end, a stationary portion distal of said movable portion an exterior surface, and an anchor defined on said exterior surface, said anchor, upon movement of said movable portion toward the distal end into contact with said stationary portion, being radially expandable from a retracted position along the longitudinal axis to an expanded position to anchor said cannula assembly to a patient;
- and
- a collar having an internal surface adapted to form a friction fit with said exterior surface of said outer sleeve to permit said collar to move the movable portion of said outer sleeve relative to said inner sleeve toward the distal end and move said anchor from the retracted position to the expanded position when said collar is moved toward the distal end, the friction fit being configured, after said anchor is expanded to the expanded position, to prevent said collar from moving relative to said outer sleeve toward the proximal end, said collar has a first portion located in a plane extending along the longitudinal axis, the first portion of the collar being movable from at least a first position in the plane to a second position in the plane via the axial movement of the collar.
Dependencies are inferred from the claim text.