Pressure sensor
AssigneeRadi Medical Systems AB
InventorsLeif Smith, Sauli Tulkki
Life of this patent
Estimating the term…
Abstract
A sensor and insertion assembly 2 is used for intravascular measurement of pressure in a living body. The assembly includes, a sensor chip 6 having a substrate body 8 with a recess covered by a pressure sensitive film 10 thereby forming a cavity 12. A piezoelectric element, preferably in the form of a piezoelectric film 14, is arranged in connection with the pressure sensitive film, and energy is applied to the piezoelectric element such that acoustic waves are generated in the element. The piezoelectric element is arranged to generate an output signal, representing the pressure at the film, in dependence on the measured properties of the acoustic waves related to the deflection of the pressure sensitive film.
Claims37
Pressure sensor comprising:
- a sensor chip having a substrate body that comprises a recess covered by a pressure sensitive film such that a cavity is formed,
- a piezoelectric element arranged in connection with said pressure sensitive film, and
- an insulating film isolating the pressure sensitive film from the substrate body,
- wherein said piezoelectric element is adapted to receive energy from an energy source such that acoustic waves are generated in said piezoelectric element, and
- wherein the piezoelectric element is arranged to generate an output signal, representing a pressure at the film, in dependence on measured properties of the acoustic waves related to a deflection of the pressure sensitive film.
Sensor and insertion assembly for intravascular measurement of pressure in a living body, comprising:
- an insertion device configured to insert the pressure sensor in a living body;
- wherein the pressure sensor comprises a sensor chip having a substrate body that comprises a recess covered by a pressure sensitive film such that a cavity is formed,
- wherein a piezoelectric element is arranged in connection with said pressure sensitive film, and said piezoelectric element is adapted to receive energy from an energy source such that acoustic waves are generated in said piezoelectric element, and
- wherein the piezoelectric element is arranged to generate an output signal, representing a pressure at the film, in dependence on measured properties of the acoustic waves related to a deflection of the pressure sensitive film.
Dependencies are inferred from the claim text.