Apparatus for controlling the supplying of intravenous fluids
First Claim
1. Apparatus for supplying a fluid to a patient, comprising in combinationa reservoir containing a quantity of said fluid,an outlet port from said reservoir,a cannula for insertion into said patient,conduit means connected between said outlet port and said cannula,flow control means connected in said conduit means for controlling the rate of flow of fluid. through said conduit means,transducer means connected between said outlet port and said flow control means for outputting a first signal representative of the pressure in said conduit means upstream of said flow control means,means for outputting a second signal representative of a manually set flow rate,computer means responsive to said first and second signals for operating said flow-control means for maintaining the rate of flow of said fluid through said conduit at said manually set flow rate, anda drip chamber connected in said conduit means between said flow control means and said cannula.
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Accused Products
Abstract
Intravenous fluid is supplied under the control of a microprocessor from a reservoir to a cannula through a flow member and a flow control device which responds, via the microprocessor, to the line pressures upstream and downstream of the control device. First and second transducers and first and second check valves are connected respectively upstream and downstream of the control device, and a constant flow resistance device is connected in series with the flow-control device to enhance the accuracy of the system.
207 Citations
7 Claims
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1. Apparatus for supplying a fluid to a patient, comprising in combination
a reservoir containing a quantity of said fluid, an outlet port from said reservoir, a cannula for insertion into said patient, conduit means connected between said outlet port and said cannula, flow control means connected in said conduit means for controlling the rate of flow of fluid. through said conduit means, transducer means connected between said outlet port and said flow control means for outputting a first signal representative of the pressure in said conduit means upstream of said flow control means, means for outputting a second signal representative of a manually set flow rate, computer means responsive to said first and second signals for operating said flow-control means for maintaining the rate of flow of said fluid through said conduit at said manually set flow rate, and a drip chamber connected in said conduit means between said flow control means and said cannula.
Specification