Valve for a catheter assembly
First Claim
Patent Images
1. A catheter comprisinga hub;
- a catheter secured to and extending from said hub to define a flow path;
a tube secured to and within said hub to define a flow path, said tube being coaxial with said catheter; and
an elastomeric valve mounted on one end of said tube remote from said catheter and within said hub, said valve having a sheath disposed over said tube in overlying relation and having a closed end defining a wall to seal said one end of said tube against a flow of blood from said catheter and a sleeve concentrically mounted on said sheath, said sleeve begin, radially stretched on said sheath to maintain a circumferentially applied compressive force on said wall of said sheath.
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Abstract
The valve for a catheter includes an elasotmeric sheath for mounting over the end of the tube within a catheter assembly to prevent a backflow of blood. The valve also includes a sleeve of rubber or plastic which fits over the end of the sheath and which is resiliently expanded when the sheath is mounted on the tube so as to impart a circumferentially applied compressive force on the closed end of the sheath. The sleeve serves to maintain the wall in a sealed condition after a needle has been pierced through the wall and is subsequently removed.
266 Citations
15 Claims
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1. A catheter comprising
a hub; -
a catheter secured to and extending from said hub to define a flow path; a tube secured to and within said hub to define a flow path, said tube being coaxial with said catheter; and an elastomeric valve mounted on one end of said tube remote from said catheter and within said hub, said valve having a sheath disposed over said tube in overlying relation and having a closed end defining a wall to seal said one end of said tube against a flow of blood from said catheter and a sleeve concentrically mounted on said sheath, said sleeve begin, radially stretched on said sheath to maintain a circumferentially applied compressive force on said wall of said sheath. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In combination
a catheter assembly having a hub and a catheter secured to and extending from said hub to define a flow path, a tube secured to and within said hub coaxially of said catheter, and an elastomeric valve on one end of said tube, said valve having a wall disposed transversely of said tube to seal said one end of said tube against a flow of blood from said catheter and a sleeve disposed about said wall to maintain a circumferentially applied compressive force on said wall; - and
a needle assembly having a needle piercing said wall and disposed coaxially within said tube and said catheter, said needle being disposed to extend into said catheter. - View Dependent Claims (8, 9, 10)
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11. In combination,
a catheter assembly having a hub, a catheter secured to and extending from said hub to define a flow path and a tube secured to and within said hub coaxially of said catheter; -
a male luer connector having a longitudinal bore slidably receiving one end of said tube therein in seal-tight relation and a forward end matingly received in said hub; an elastomeric sheath mounted on said one end of said tube and being compressed between said forward end of said male luer connector and an interior of said hub, said sheath being expandable into a position sealing over said one end of said tube upon removal of said male luer connector from said catheter to seal said tube end against a flow of blood from said catheter; and a sleeve concentrically mounted on said sheath, said sleeve being radially stretched on said sheath in said position to maintain a circumferentially applied compressive force on said sheath to seal said tube end against a flow of blood from said catheter. - View Dependent Claims (12, 13)
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14. A valve for sealing one end of a tube, said valve comprising,
an elastomeric sheath for sliding over one end of the tube, said sheath having a closed end defining a wall to seal the end of the tube against a flow of blood from the tube and to permit penetration of a needle therethrough; - and
an elastomeric sleeve concentrically mounted on said sheath, said sleeve being radially stretched with said sheath being mounted on the tube to apply a circumferential compressive force on said wall of said sheath to maintain said wall in a sealed condition after removal of a needle therefrom. - View Dependent Claims (15)
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Specification