Interventional procedure drive and control system
First Claim
1. A method for infusing and aspirating fluids into and out of a living being, comprising:
- (a) providing a pumping system comprising;
(i) a means of infusing a liquid into said patient;
(ii) a means of aspirating a fluid from said patient, each of said means comprising a positive displacement pump other than a peristaltic type pump, said positive displacement pump having an inlet and an outlet side;
(iii) an aspiration pathway containing a fluid consisting essentially of liquid during use;
(iv) a shut-off valve located on said inlet side of said aspirating means pump, said shut-off valve arranged to close off a pathway of said liquid when the pump is stopped; and
(v) means for controlling said pumps;
(b) connecting said infusion pathway and said aspiration pathway to said living being to create a fluid circuit;
(c) first energizing said aspirating means; and
(d) subsequently energizing said infusing means such that a flow rate of infusate is less than a flow rate of aspirate.
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Accused Products
Abstract
A pumping system for use in medical applications where liquids must be infused and aspirated from a mammalian patient, and whose economics are such that it is cost effective to simply dispose of it after a single use. The system features positive displacement pump(s) such as reciprocating pump(s) containing a damping mechanism to dampen out the peaks and valleys in the fluid pressure that is pumped, which is important for preventing cavitation. The system furthermore features a shut-off valve on the extraction side so that certain injected fluids such as contrast medium, are not immediately pumped out of the patient. In a preferred embodiment, the system also features means for independently controlling the fluid pressure/volume on the infusion and extraction sides, self-priming capability, a continuous fluid path, and visual air bubble detection, with viewports located at important points in the fluid path, such as at pumps and valves.
39 Citations
20 Claims
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1. A method for infusing and aspirating fluids into and out of a living being, comprising:
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(a) providing a pumping system comprising; (i) a means of infusing a liquid into said patient; (ii) a means of aspirating a fluid from said patient, each of said means comprising a positive displacement pump other than a peristaltic type pump, said positive displacement pump having an inlet and an outlet side; (iii) an aspiration pathway containing a fluid consisting essentially of liquid during use; (iv) a shut-off valve located on said inlet side of said aspirating means pump, said shut-off valve arranged to close off a pathway of said liquid when the pump is stopped; and (v) means for controlling said pumps; (b) connecting said infusion pathway and said aspiration pathway to said living being to create a fluid circuit; (c) first energizing said aspirating means; and (d) subsequently energizing said infusing means such that a flow rate of infusate is less than a flow rate of aspirate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification