Implantable cardiovascular sensor
AssigneeIP2Ipo Innovations Limited
InventorsMohammad Reza Bahmanyar, Christopher Neil McLeod
Life of this patent
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Abstract
An implantable cardiovascular pressure sensor comprising a rigid enclosure sealed by a flexible membrane; and an elongate compliant member comprising a piezoelectric material, the member having a width and a length greater than the width, and two ends separated by the length and two sides separated by the width; wherein the flexible membrane is coupled to the elongate compliant member to transfer external fluid pressure load to the elongate compliant member to cause deflection of the elongate compliant member in response to changes in the external fluid pressure; the pressure sensor further comprising a first acoustic wave device provided by the piezoelectric material of the elongate compliant member for sensing said deflection.
Claims17
An implantable cardiovascular pressure sensor comprising:
- a rigid enclosure sealed by a flexible membrane;
- and
- an elongate compliant member comprising a piezoelectric material, the member having a width and a length greater than the width, and two ends separated by the length and two sides separated by the width, the elongate compliant member further comprising a top face and a bottom face, the bottom face facing into a cavity of the rigid enclosure;
- wherein the flexible membrane is coupled to the elongate compliant member to transfer external fluid pressure load to the elongate compliant member to cause deflection of the elongate compliant member in response to changes in the external fluid pressure;
- the pressure sensor further comprising:
- a first surface acoustic wave device disposed on the bottom face of the elongate compliant member, for sensing said deflection,
- wherein the two ends of the elongate compliant member are supported on or rigidly fixed to the rigid enclosure and the two sides are not rigidly connected to the rigid enclosure to provide that deflection of the elongate compliant member is a beam deflection.
An implantable cardiovascular pressure sensor comprising:
- a rigid enclosure sealed by a flexible membrane;
- and
- an elongate compliant member comprising a piezoelectric material, the member having a width and a length greater than the width, and two ends separated by the length and two sides separated by the width;
- wherein the flexible membrane is coupled to the elongate compliant member to transfer external fluid pressure load to the elongate compliant member to cause deflection of the elongate compliant member in response to changes in the external fluid pressure;
- the pressure sensor further comprising:
- a first acoustic wave device provided by the piezoelectric material of the elongate compliant member for sensing said deflection,
- wherein the deflection of the elongate compliant member comprises a beam deflection,
- wherein the flexible membrane comprises a strain relief,
- wherein the two sides of the elongate compliant member are not supported on and not rigidly fixed to the rigid enclosure, and
- wherein the two sides of the elongate compliant member are connected to the rigid enclosure by the strain relief.
Dependencies are inferred from the claim text.