Combined flow, pressure and temperature sensor
AssigneeRadi Medical Systems AB
InventorLeif Smith
Life of this patent
Estimating the term…
Abstract
The invention relates to a device for measuring pressure, temperature and flow velocity. It comprises a sensor (6) with a sensor support body (13) provided with a diaphragm (15) covering a cavity (14) formed in the support body (13). A pressure sensitive element (41) is mounted on the diaphragm, for recording pressure. Furthermore, a temperature sensitive resistor (42) mounted in the vicinity of and having known temperature dependences, for recording temperature. It also comprises an electrical circuit (43, 44, 45, 46) selectively outputting signals from either of the pressure sensitive element and the temperature sensitive resistor.
Claims17
A device for biological pressure and temperature measurements, comprising:
- a guide wire;
- a pressure sensor mounted on the guide wire;
- a temperature sensor mounted on the guide wire in the vicinity of the pressure sensor;
- and
- an electronic circuit to generate and output an indication of temperature based on signals from the temperature sensor, wherein the electronic circuit further outputs an indication of a flow parameter of a flowing fluid based on signals from the temperature sensor.
A device for biological measurements, comprising:
- a guide wire;
- a pressure sensor mounted on the guide wire;
- and
- a flow sensor mounted on the guide wire,
- wherein the flow sensor is configured to sense a flow of fluid based on a temperature change, wherein the temperature change is indicated by a difference between a measured resistance of the flow sensor and a static resistance of the flow sensor that would be expected when there is no flow.
A device for biological measurement, comprising:
- a guide wire;
- a pressure sensor mounted on the guide wire;
- and
- a temperature sensitive resistor mounted on the guide wire,
- wherein the temperature sensitive resistor is configured to sense a flow of fluid in a vessel of a body based on a temperature change, wherein the temperature change is indicated by a difference between a measured resistance of the resistor and a static resistance of the resistor that would be expected when there is no flow.
Dependencies are inferred from the claim text.