Gel-filled blood pressure transducer
First Claim
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1. A reusable pressure transducer comprising:
- a body having a recess terminating in an opening surrounded by a rim, said body having an outer surface;
a flexible diaphragm placed over said rim to enclose said recess;
said body having a hole spaced from said diaphragm, said hole connecting the outer surface of said body to said recess;
a pressure sensor mounted on said outer surface over said hole;
and a dielectric gel completely filling said recess and hole and in contact with both said diaphragm and said pressure sensor whereby pressure on said diaphragm will be communicated through said gel to said sensor, said dielectric gel slightly distending said diaphragm.
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Abstract
A reusable pressure transducer for use with a detachable dome. The pressure transducer includes a body having a recess with an opening covered by a flexible diaphragm. The body has a hole opposite the flexible diaphragm and a sensor placed over the hole. A dielectric gel fills the recess to transmit to the sensor variations in pressure imparted to the diaphragm.
76 Citations
6 Claims
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1. A reusable pressure transducer comprising:
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a body having a recess terminating in an opening surrounded by a rim, said body having an outer surface; a flexible diaphragm placed over said rim to enclose said recess; said body having a hole spaced from said diaphragm, said hole connecting the outer surface of said body to said recess; a pressure sensor mounted on said outer surface over said hole; and a dielectric gel completely filling said recess and hole and in contact with both said diaphragm and said pressure sensor whereby pressure on said diaphragm will be communicated through said gel to said sensor, said dielectric gel slightly distending said diaphragm. - View Dependent Claims (2)
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3. The method of making a transducer comprising the steps of:
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forming a body with a cavity opening at one side and a first bore extending from said cavity to another side of said body; forming a filling bore to said cavity; enclosing said opening with a flexible diaphragm; mounting a sensor assembly over said first bore; filling said cavity with a curable liquid through said filling bore; plugging said filling bore, the quantity of liquid in said cavity distending said diaphragm upon plugging of said filling bore; and curing said liquid to form a gel. - View Dependent Claims (4, 5, 6)
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Specification