Bidirectional check valve catheter
First Claim
1. A bidirectionally valved catheter comprising:
- at least one elongated, flexible tubular element defining a lumen extending along an axis substantially parallel to the central axis of said tubular element and adapted for selective flow of fluid therein between a proximal end and a distal end of said tubular element, anda first bidirectional check valve assembly coupled to said lumen and disposed near said distal end of said tubular element, said valve assembly including an aspiration valve for fluid inflow from outside to inside said tubular element and an infusion valve for fluid outflow from inside to outside said tubular element, said aspiration valve including a sleeve valve positioned near said distal end, and said infusion valve including a slit valve at said distal end.
9 Assignments
0 Petitions
Accused Products
Abstract
A valved catheter is disclosed having an elongated, flexible tubular element defining a lumen extending along an axis substantially parallel to the central axis of the tubular element, and a bidirectional check valve assembly near its distal end which controls fluid flow in the tubular element. The valve assembly includes an aspiration valve offset from the tip of the distal end and an infusion valve formed at the tip of the distal end. The aspiration valve is generally defined by port(s) in the tubular element and a sleeve within the element underlying the ports, where the sleeve normally closes the ports. The aspiration valve permits fluid flow from the bloodstream into the element when the static fluid pressure inside the distal end is lower than the static fluid pressure outside the aspiration valve by an amount sufficient to displace the sleeve to allow fluid flow through the ports. The infusion valve includes a throat formed in the distal end which tapers down to a mouth formed by jaws at the tip. The mouth is essentially closed to fluid inflow from the patient into the tubular element and normally closed to fluid outflow from the tubular element into the patient. The infusion valve permits fluid infusion into the bloodstream when the static fluid pressure inside of the tubular element sidtal end is higher than the static fluid pressure outside of the infusion valve by an amount sufficient to force the mouth open. A bidirectionally valved multiple lumen catheter is also disclosed.
444 Citations
12 Claims
-
1. A bidirectionally valved catheter comprising:
-
at least one elongated, flexible tubular element defining a lumen extending along an axis substantially parallel to the central axis of said tubular element and adapted for selective flow of fluid therein between a proximal end and a distal end of said tubular element, and a first bidirectional check valve assembly coupled to said lumen and disposed near said distal end of said tubular element, said valve assembly including an aspiration valve for fluid inflow from outside to inside said tubular element and an infusion valve for fluid outflow from inside to outside said tubular element, said aspiration valve including a sleeve valve positioned near said distal end, and said infusion valve including a slit valve at said distal end. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A multiple lumen, bidirectionally valved catheter comprising:
-
an elongated flexible tubular element defining a plurality of lumens extending along axes substantially parallel to the central axis of said tubular element and adapted for selective flow of fluid therein between a proximal end and a distal end of said tubular element, and a plurality of bidirectional check valve assemblies, each of said assemblies being associated with one of said lumens and including an aspiration valve for fluid inflow from outside said tubular element to inside said associated lumen and an infusion valve for fluid outflow from inside said associated lumen to outside said tubular element, and being coupled to said associated lumen and disposed near said distal end of said tubular element, wherein for one or more of said valve assemblies, said aspiration valve including a sleeve valve positioned near said distal end, and said infusion valve including a slit valve at said distal end. - View Dependent Claims (12)
-
Specification