Caps for sealing a cannula assembly
AssigneeOwens Precision Systems, Inc.
InventorsLanis P. Pfoslgraf, Gene T. Kyburz
Life of this patent
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Abstract
A cannula cap for sealing a cannula assembly during insufflatory surgery, the cap comprising an endwall made of elastomeric material and a sidewall. The cap is sized and configured to fit to the instrument entrance of a cannula in a relative gas-tight relationship. The endwall of the cap may be apertured to permit entry and exit of a trocar or other surgical instrument without significant interruption of the seal. Another embodiment provides an adaptor cap also comprising an endwall made of an elastomeric material and a sidewall, the adaptor cap arranged to be fitted to the cannula cap for temporary insertion and withdrawal of instruments of relatively small diameter without removal of the cannula cap.
Claims18
An apparatus for sealing a cannula during an insufflatory surgical procedure, the cannula comprising an entrance defined by a marginal end surface for receiving surgical instruments, the apparatus comprising:
- a cannula cap comprising a sidewall and at least a partially elastomeric endwall for enclosing the entrance, the elastomeric endwall having an inwardly projecting convex area, the cannula cap adapted for engagement with the entrance of the cannula so as to provide a relatively gas-tight seal;
- and
- an adapter cap having a sidewall and an endwall, the endwall being substantially planar and perpendicular to the sidewall and comprised at least partially of an elastomeric material, the adapter cap sealingly engaged to the cannula cap and free of engagement with the cannula, the adapter cap allowing the insertion of a relatively smaller surgical instrument than that capable without the adapter cap while maintaining the relative gas-tight seal.
An apparatus for sealing an end of a cannula, said apparatus comprising:
- an adaptor cap and a cannula cap, the cannula and adaptor caps each comprising a sidewall and at least a partially elastomeric end wall, the partially elastomeric end wall of the cannula cap having an inwardly projecting convex surface, the adaptor cap sidewall attached to the cannula cap end wall effectively extending the sidewall of the cannula cap thereby forming a relatively tight gas-sealing relationship with the cannula cap, and the end wall of the adaptor cap adapted for receiving a surgical instrument in a relatively tight gas-sealing engagement.
A cannula cap assembly for sealing a cannula used during surgical procedures, the cannula comprising an entrance defined by a marginal end surface for receiving surgical instruments, the cap assembly comprising:
- A. a first cannula cap comprising:
- (1) a rigid first sidewall;
- (2) a first end wall extending from said first sidewall, said first end wall comprising at least partially of an elastomeric material different than the material of the rigid first sidewall;
- (3) an inwardly projecting, pyramidal-like portion extending from said first end wall, said pyramidal-like portion formed of elastomeric material and having an inwardly projecting convex area with a slit therein to allow the insertion of a surgical instrument in a substantially sealed arrangement;
- B. a second cannula cap comprising:
- (1) a second sidewall;
- and
- (2) a second end wall extending from said second sidewall, said second end wall comprising at least partially of an elastomeric material and adapted for receiving a smaller surgical instrument in a relatively tight, gas-sealing engagement;
- C. wherein said second cannula cap is fitted to said first cannula cap to form a substantially gas-tight seal.
A cannula cap assembly for sealing a cannula used during surgical procedures, the cannula comprising an entrance defined by a marginal end surface for receiving surgical instruments, the cap assembly comprising:
- A. a first cannula cap comprising:
- (1) a rigid first sidewall;
- (2) a first end wall extending from said first sidewall, said first end wall comprising at least partially of an elastomeric material different than the material of the rigid first sidewall;
- and
- (3) a first inwardly projecting, pyramidal-like portion extending from said first end wall, said first pyramidal-like portion formed of elastomeric material and having at least two cannula cap flaps to allow the insertion of a surgical instrument in a substantially sealed arrangement;
- B. a second cannula cap comprising:
- (1) a second sidewall;
- and
- (2) a second end wall extending from said second sidewall, said second end wall comprising at least partially of an elastomeric material and adapted for receiving a smaller surgical instrument in a relatively tight, gas-sealing engagement;
- C. wherein said second cannula cap is fitted to said first cannula cap to form a substantially gas-tight seal.
Dependencies are inferred from the claim text.