Interventional procedure drive and control system
First Claim
1. A pumping system for use in medical applications where fluids are infused into and aspirated from a living being, said system comprising:
- (a) a means of infusing a liquid into said patient;
(b) 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;
(c) an aspiration pathway containing a fluid consisting essentially of liquid;
(d) 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
(e) means of controlling said pump.
1 Assignment
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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.
22 Citations
25 Claims
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1. A pumping system for use in medical applications where fluids are infused into and aspirated from a living being, said system comprising:
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(a) a means of infusing a liquid into said patient; (b) 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; (c) an aspiration pathway containing a fluid consisting essentially of liquid; (d) 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 (e) means of controlling said pump. - View Dependent Claims (2, 3, 4)
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5. A pumping system for use in medical applications where fluids are infused into and aspirated from a living being, said system comprising:
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(a) a means of infusing a liquid into said patient; (b) a means of aspirating a fluid, said fluid being removed 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; (c) an aspiration pathway containing a fluid consisting essentially of liquid; (d) 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 (e) means of controlling said pumps, wherein said infusion means and said extraction means are provided by separate pumps, and further wherein said pumps are driven by motors, said motors comprising speed sensors. - View Dependent Claims (6, 7)
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8. A pumping system for use in medical applications where fluids are infused into and aspirated from a living being, said system comprising:
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(a) a means for infusing a liquid into said patient along an infusion pathway; (b) a means for aspirating a fluid from said patient along an aspiration pathway, 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, wherein at least said aspirating means comprises a shut-off valve located on the inlet side of said pump for aspirating; (c) a damper apparatus for smoothing out an instantaneous flow rate fluctuation of the pumped liquid, said damper apparatus comprising a compliant element that adjusts a volume of at least one of said infusion pathway and said aspiration pathway in response to a pressure fluctuation of said pumped liquid; and (d) means of controlling said infusing means and aspirating means. - View Dependent Claims (9, 10)
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11. A pumping system for use in medical applications where fluids are infused into and aspirated from a living being, said system comprising:
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(a) a means for infusing a liquid into said patient; (b) a means for aspirating a fluid from said patient, wherein said aspirating means operates at a pressure that is sub-atmospheric, each of said means consisting essentially of a positive displacement pump other than a peristaltic type pump; (c) a combined damper apparatus and shut-off valve located on said aspirating portion of said system; and (d) means of controlling said pumps. - View Dependent Claims (12)
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13. A pumping system for use in medical applications where fluids are infused into and aspirated from a living being, said system comprising:
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(a) an aspiration pathway containing a fluid consisting essentially of liquid; (a) a means for infusing a liquid into said patient; (b) a means for aspirating a fluid from said patient, said fluid consisting essentially of a liquid, 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; (c) a shut-off valve located on said inlet side of said aspirating means pump, said shut-off valve arranged to close off a flow of liquid when the pump is stopped; and (d) means for controlling said pumps. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification