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US 2014/0276945 A1Published application
Trocar cannula assembly with low profile insertion configuration and method of manufacture
AssigneeApplied Medical Resources Corporation
InventorsBoun Pravong, Kennii Pravongviengkham, Eduardo Bolanos, Joel B. Velasco
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Abstract
A cannula assembly having a retention member and a method of manufacture of the cannula assembly is provided. The cannula assembly includes a cannula and a sleeve disposed around the cannula from a proximal end to a distal end. The sleeve can include a balloon formed by a stretch blow molding process following local heating once advanced over the cannula. Once formed, the balloon can be conditioned to constrict against the cannula. A conditioning aid can be advanced over the balloon when it is still formable to constrict the balloon against the cannula.
Claims5
A cannula assembly comprising:
- a cannula having a proximal end, a distal end opposite the proximal end, and a lumen extending from the proximal end to the distal end along a longitudinal axis, the lumen configured to receive a surgical instrument therein, the cannula comprising:
- a generally tubular cannula body having an exterior surface and a first outer diameter;
- and
- an annular recess formed in the exterior surface of the cannula body adjacent the distal end of the cannula, the annular recess transverse to the longitudinal axis, the annular recess having a second outer diameter smaller than the first outer diameter of the cannula body;
- and
- a sleeve having a proximal end and a distal end, the sleeve disposed around the cannula from adjacent the proximal end of the cannula to the annular recess, the sleeve comprising:
- an elongate tubular body;
- a balloon positioned distal the elongate tubular body;
- and
- a chamfered leading edge at the distal end of the sleeve.
7 more elements
A cannula assembly comprising:
- a cannula having a proximal end, a distal end opposite the proximal end, and a lumen extending from the proximal end to the distal end along a longitudinal axis, the lumen configured to receive a surgical instrument therein, the cannula comprising:
- a generally tubular cannula body having an exterior surface and a first outer diameter;
- and
- an annular recess formed in the exterior surface of the cannula body adjacent the distal end of the cannula, the annular recess transverse to the longitudinal axis, the annular recess having a second outer diameter smaller than the first outer diameter of the cannula body, and the annular recess having a textured surface adapted to receive an adhesive;
- and
- a sleeve having a proximal end and a distal end, the sleeve disposed around the cannula from adjacent the proximal end of the cannula to the annular recess, the sleeve comprising:
- an elongate tubular body;
- and
- a balloon positioned distal the elongate tubular body.
6 more elements
A cannula assembly comprising:
- a cannula having a proximal end, a distal end opposite the proximal end, and a lumen extending from the proximal end to the distal end along a longitudinal axis, the lumen configured to receive a surgical instrument therein, the cannula comprising:
- a generally tubular cannula body having an exterior surface and a first outer diameter;
- and
- an annular recess formed in the exterior surface of the cannula body adjacent the distal end of the cannula, the annular recess transverse to the longitudinal axis, the annular recess having a second outer diameter smaller than the first outer diameter of the cannula body;
- a sleeve having a proximal end and a distal end, the sleeve disposed around the cannula from adjacent the proximal end of the cannula to the annular recess, the sleeve comprising:
- an elongate tubular body;
- and
- a balloon positioned distal the elongate tubular body;
- and
- a conditioning aid removably disposed around the balloon, the conditioning aid sized to compress the balloon proximally along the exterior surface of the generally tubular cannula body in a snug fit defining a low diameter insertion profile.
7 more elements
A method of making a cannula assembly having an inflatable balloon comprising:
- positioning a generally tubular sleeve having a proximal end and a distal end over a cannula having a proximal end and a distal end, the cannula comprising an elongate cannula body with an annular groove formed in the cannula body at the distal end of the cannula;
- bonding the proximal end and the distal end of the sleeve to the cannula;
- locally heating a predetermined length of the tubular sleeve adjacent the distal end of the tubular sleeve;
- applying an source of inflation fluid to the tubular sleeve to form a balloon adjacent the distal end of the tubular sleeve;
- and
- after forming the balloon and while the balloon retains residual heat from the local heating, conditioning the balloon to constrict against the cannula.
3 more elements
Dependencies are inferred from the claim text.