Pressure measurement device
First Claim
1. An apparatus for measuring physiological pressure comprising:
- a pressure transmitting catheter having a lumen filled with a pressure transmitting medium;
a transducer in communication with the pressure transmitting medium to provide a pressure signal representing variations in the physiological pressure on an electrical wire;
signal processing circuitry coupled to the electrical wire to process the pressure signal; and
a housing holding the signal processing circuitry and the transducer;
wherein the pressure transmitting catheter includes a first layer material surrounding the lumen and at least one additional layer of material surrounding the first layer material, wherein the at least one additional layer of material has at least one material with a different hardness than the first layer of material.
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Accused Products
Abstract
A device measures pressures in animals and humans and includes a pressure transmission catheter (PTC) filled with a pressure transmitting medium and implantable in an area in having a physiological pressure. A transducer communicates with the pressure transmitting medium to provide a pressure signal representing variations in the physiologic pressure on electrical wires. A connecting catheter carries the electrical wires to signal processing and telemetry circuitry, which transmits a telemetry signal representing the pressure signal to a receiver external to the animal or human. A housing holds the signal processing and telemetry circuitry, but the transducer is remote from the housing. The device is particularly useful in measuring venous pressure, pulmonary pressure, bladder pressure, or intracranial pressure without significant head pressure artifact and with a sufficient dynamic response. One embodiment of the PTC includes a multi-durometer stem.
104 Citations
34 Claims
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1. An apparatus for measuring physiological pressure comprising:
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a pressure transmitting catheter having a lumen filled with a pressure transmitting medium;
a transducer in communication with the pressure transmitting medium to provide a pressure signal representing variations in the physiological pressure on an electrical wire;
signal processing circuitry coupled to the electrical wire to process the pressure signal; and
a housing holding the signal processing circuitry and the transducer;
wherein the pressure transmitting catheter includes a first layer material surrounding the lumen and at least one additional layer of material surrounding the first layer material, wherein the at least one additional layer of material has at least one material with a different hardness than the first layer of material. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for measuring physiological pressure comprising:
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a pressure transmission catheter having a lumen filled entirely with a pressure transmitting gel and implantable in an area having a physiological pressure;
a transducer in communication with the pressure transmitting gel and coupled to an electrical wire to provide a pressure signal representing variations in the physiologic pressure on the electrical wire;
signal processing circuitry coupled to the electrical wire to receive the pressure signal and provide a signal representing the pressure signal; and
a housing for holding the signal processing circuitry and transducer. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus for measuring physiological pressure comprising:
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a pressure transmission catheter having a lumen filled with a pressure transmitting medium and implantable in an area having a physiological pressure;
a transducer in communication with the pressure transmitting medium and coupled to an electrical wire for providing a signal representing variations in the physiologic pressure on the electrical wire; and
a connecting catheter carrying the electrical wire to a location remote from the transducer. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An apparatus for measuring physiological pressure comprising:
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a pressure transmission catheter having a lumen filled entirely with a pressure transmitting gel and implantable in an area having a physiological pressure; and
a transducer in communication with the pressure transmitting gel and coupled to an electrical wire to provide a signal on the electrical wire which represents variations in the physiologic pressure. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
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Specification