Catheter introducer having toroidal valve
First Claim
1. A catheter introducer which comprises a tubular sheath having an axis and a housing carried on one end thereof, said housing enclosing a flexible-walled toroidal member defining a central aperture aligned with the tubular sheath axis, said central aperture being normally closed but penetrable by a catheter in sealing manner as the catheter is advanced through said catheter sheath introducer, said normally closed central aperture being surrounded by an elastic sleeve carried by said toroidal member to bias said central aperture into closed position.
3 Assignments
0 Petitions
Accused Products
Abstract
A catheter introducer defines a tubular sheath with a housing on one end thereof, with the housing enclosing a fluid-filled, elastic-walled toroidal member defining a central aperture aligned with the tubular sheath axis. The central aperture is normally closed, being retained in the closed position by an elastic sleeve carried by the toroidal member. The central aperture is penetrable by a catheter in sealing manner as the catheter is advanced through the catheter sheath introducer.
304 Citations
10 Claims
- 1. A catheter introducer which comprises a tubular sheath having an axis and a housing carried on one end thereof, said housing enclosing a flexible-walled toroidal member defining a central aperture aligned with the tubular sheath axis, said central aperture being normally closed but penetrable by a catheter in sealing manner as the catheter is advanced through said catheter sheath introducer, said normally closed central aperture being surrounded by an elastic sleeve carried by said toroidal member to bias said central aperture into closed position.
- 6. A catheter introducer which comprises a tubular sheath having a housing carried on one end thereof, said housing enclosing an elastic-walled toroidal member which is filled with a compressible fluid, said toroidal member defining a central aperture aligned with the tubular sheath axis, said central aperture being normally closed, said normally closed central aperture being surrounded by an elastic sleeve carried by said toroidal member to bias the central aperture into closed position, said central aperture being penetrable by a catheter in sealing manner with stretching of said elastic sleeve as the catheter is advanced through the catheter sheath introducer.
Specification