Perivascular pressure sensor and sensing system

摘要

An embodiment of the invention is an in-vivo blood pressure sensor device including a strain transducer and flexible biocompatible material that carries the strain transducer. The flexible biocompatible material is configured to encircle the outside of a blood vessel when surgically installed. A preferred embodiment in-vivo blood pressure sensor device of the invention includes a strain transducer carried by a flexible biocompatible ring that is configured to be surgically installed to encircle a blood vessel. The device also includes passive circuitry encased in biocompatible material for sensing strain in the strain transducer and for providing data to an external reader. The passive circuitry is also configured to be surgically installed in a subject. The device further includes a telemetry coil encased in biocompatible material and configured to be surgically installed in a subject, to receive power via inductive coupling to an external reader, to supply power to the passive circuitry and to act as an antenna for communications with an external reader.