Blood aspiration system and methods of use
First Claim
1. Apparatus suitable for providing variable rates of aspiration to a working lumen of a catheter, the apparatus comprising:
- a manifold having an inlet port, an outlet port, a slide valve slidingly disposed therebetween, the slide valve having an open position and a closed position, and a first check valve disposed within the manifold and in fluid communication with the inlet port, wherein the inlet port is in fluid communication with the working lumen of the catheter;
a pump coupled to the manifold, the pump having a housing defining a pump lumen and a plunger disposed within the lumen, the pump coupled to the manifold so that the plunger contacts and retains the slide valve in the open position when the plunger is fully depressed in the pump lumen;
a spring in operative association with the slide valve to bias the slide valve to a closed position;
wherein proximally retracting the plunger moves the slide valve to the closed position and causes fluid to enter the pump lumen, whereby proximally retracting the plunger varies the rate of aspiration in the working lumen of the catheter, and wherein distally advancing the plunger causes fluid in the pump lumen to exit through the outlet port.
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Accused Products
Abstract
The present invention is directed to a blood aspiration system that is configured to enable various types of aspiration through a working lumen of a catheter. The blood aspiration system facilitates natural aspiration by providing a circuit between a patient'"'"'s arterial and venous vasculature, and also comprises a manually actuated pump configured to selectively vary rates of aspiration in the working lumen. The blood aspiration system further comprises an external port that allows suction-assisted aspiration or infusion through the working lumen, and further comprises a detachable filter that removes emboli prior to reperfusing blood into a patient'"'"'s venous vasculature.
236 Citations
24 Claims
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1. Apparatus suitable for providing variable rates of aspiration to a working lumen of a catheter, the apparatus comprising:
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a manifold having an inlet port, an outlet port, a slide valve slidingly disposed therebetween, the slide valve having an open position and a closed position, and a first check valve disposed within the manifold and in fluid communication with the inlet port, wherein the inlet port is in fluid communication with the working lumen of the catheter; a pump coupled to the manifold, the pump having a housing defining a pump lumen and a plunger disposed within the lumen, the pump coupled to the manifold so that the plunger contacts and retains the slide valve in the open position when the plunger is fully depressed in the pump lumen; a spring in operative association with the slide valve to bias the slide valve to a closed position; wherein proximally retracting the plunger moves the slide valve to the closed position and causes fluid to enter the pump lumen, whereby proximally retracting the plunger varies the rate of aspiration in the working lumen of the catheter, and wherein distally advancing the plunger causes fluid in the pump lumen to exit through the outlet port. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. Method for providing variable rates of aspiration to a working lumen of a catheter, the method comprising:
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providing apparatus comprising a manifold having an inlet port in fluid communication with the working lumen of the catheter, an outlet port, a slide valve slidingly disposed therebetween and operable between an open position and a closed position, a spring in operative association with the slide valve to bias the slide valve to the closed position, and a first check valve disposed within the manifold and in fluid communication with the inlet port, the apparatus further comprising a pump coupled to the manifold, the pump including a housing having a pump lumen and a plunger disposed within the pump lumen, the pump coupled to the manifold so that the plunger contacts and retains the slide valve in the open position when the plunger is fully depressed in the pump lumen; proximally retracting the plunger to move the slide valve to the closed position and to cause fluid to enter the pump lumen, whereby proximally retracting the plunger causes the spring to urge the slide valve to the closed position and varies the rate of aspiration in the working lumen of the catheter; and distally advancing the plunger to cause fluid in the pump lumen to exit through the outlet port. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification