Pressure activated safety valve with anti-adherent coating
First Claim
Patent Images
1. A pressure activated valve comprising:
- a valve housing defining a lumen for receiving bodily fluids therein;
a flexible membrane disposed in the valve housing, the flexible membrane including a slit extending therethrough so that the flexible membrane may be moved between an open and a closed configuration based on fluid pressure within the lumen; and
a first nonthrombogenic coating formed on fluid contacting surfaces of the flexible membrane.
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Abstract
A pressure activated valve comprises a valve housing defining a lumen for receiving bodily fluids therein and a flexible membrane disposed in the valve housing. The flexible membrane includes a slit extending therethrough so that the flexible membrane may be moved between an open and a closed configuration based on fluid pressure within the lumen. A nonthrombogenic coating may be formed on fluid contacting surfaces of the flexible membrane.
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Citations
21 Claims
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1. A pressure activated valve comprising:
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a valve housing defining a lumen for receiving bodily fluids therein;
a flexible membrane disposed in the valve housing, the flexible membrane including a slit extending therethrough so that the flexible membrane may be moved between an open and a closed configuration based on fluid pressure within the lumen; and
a first nonthrombogenic coating formed on fluid contacting surfaces of the flexible membrane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A dialysis catheter comprising:
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an elongated body having a proximal end connectable to a dialysis machine and a distal end adapted for insertion into a blood vessel;
a lumen extending through the elongated body between the proximal and distal ends;
a valve disposed within the lumen for controlling a flow of blood therethrough; and
a nonthrombogenic coating applied to blood contacting surfaces of the valve. - View Dependent Claims (11, 12, 13)
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14. A medical device comprising:
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a lumen extending therethrough, a distal end of the device being adapted to fluidly connect the lumen to a blood vessel;
a valve disposed within the lumen for controlling a flow of blood therethrough; and
a nonthrombogenic coating disposed on at least a portion of blood contacting surfaces of the device. - View Dependent Claims (15, 16, 17)
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18. A pressure activated valve comprising:
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a valve housing defining a lumen for receiving bodily fluids therein; and
a flexible member disposed in the valve housing, the flexible member comprising a plurality of flexible membranes stacked on one another, each of the flexible membranes including at least one slit extending therethrough so that each flexible membrane may be moved between an open and a closed configuration based on fluid pressure within the lumen, wherein when all of the flexible membranes are moved to an open position, the flexible member is open to permit fluid flow through the housing. - View Dependent Claims (19, 20, 21)
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Specification