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US 2011/0087167 A1Published application
Trocar with retention cannula
AssigneeApplied Medical Resources Corporation
InventorsJeremy J. Albrecht, Gary M. Johnson, Matthew M. Becerra, Travis King, Donald L. Gadberry, Isabel Simons
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Abstract
A trocar comprises a retention cannula comprising an inverted or incised retention pattern disposed thereon. Embodiments of the incised cannula exhibit reduced tissue trauma compared with screw-threaded cannula, improved fixation and/or retention compared with an unthreaded cannula, and good sealing between the cannula and the incision.
Claims16
A trocar comprising:
- a retention cannula comprising:
- a proximal end, a distal end, and a longitudinal axis;
- a cannula wall defining a lumen extending between the proximal end and the distal end;
- a tip disposed at the distal end of the cannula,
- a cannula body between the proximal end of the cannula and the tip;
- and
- an inverted, tissue retention pattern extending into the wall of the cannula body,
- wherein an outer diameter of the inverted pattern is not greater than an outer diameter of the cannula body;
- and
- a seal assembly coupled to the proximal end of the cannula.
7 more elements
A trocar comprising:
- a retention cannula comprising:
- a tubular body having a proximal end, a distal end, a lumen extending between the proximal end and the distal end, an outer diameter, and a longitudinal axis;
- a tip disposed at the distal end of the tubular body, and
- a tissue retention channel extending radially into the tubular body and having a root surface with a diameter less than the diameter of the tubular body, the tissue retention channel comprising:
- a first plurality of thread roots extending generally perpendicular to the longitudinal axis of the tubular body;
- and
- a second plurality of thread roots each having a retention segment extending generally perpendicular to the longitudinal axis of the tubular body and a flow channel extending generally transverse to the longitudinal axis of the tubular body;
- and
- a seal assembly coupled to the proximal end of the cannula.
6 more elements
Dependencies are inferred from the claim text.