PRESSURE SENSOR FOR INTRODUCTION TO THE HUMAN CIRCULAR SYSTEM Russian patent published in 2023 - IPC A61B5/215 A61M25/01 G01K1/26 G01L9/00 

FIELD: medicine.

SUBSTANCE: pressure sensor for insertion into the human circulatory system, a method for measuring pressure, an implantable medical device, and a pressure sensor reading system. The pressure sensor is a passive sensor and contains a housing, a magnetomechanical oscillation generator, a torque recovery unit. The body contains a diffusion-blocking layer covering a part of the body and configured to maintain a predetermined pressure inside the body. The oscillation generator is designed to convert an external magnetic or electromagnetic excitation field into a mechanical oscillation of a magnetic object and contains a magnetic object that provides a constant magnetic torque inside the housing. The housing part is flexible to allow changes in external pressure to be converted into changes in the mechanical vibration of the magnetic object. The magnetic object is positioned inside the housing in such a way that it can rotate beyond the equilibrium orientation if an external magnetic or electromagnetic excitation field acts on the magnetic object. The torque recovery unit contains an additional magnetic object for creating a magnetic field in such a position of the magnetic object that it provides a restoring torque. The torque recovery unit is configured to provide a recovery torque to return the magnetic object to an equilibrium orientation. The pressure sensor is designed in such a way that changes in external pressure can be converted into changes in resonant frequency. The implantable medical device includes a pressure sensor. The reading system contains a field generator, a converter, a processor and is designed for wireless reading of pressure sensor readings. The field generator is designed to generate a magnetic or electromagnetic excitation field to induce mechanical oscillations of the magnetic object of the pressure sensor. The transducer is designed to convert the magnetic or electromagnetic field generated by induced mechanical vibrations of the magnetic object of the pressure sensor into electrical response signals. The processor is designed to determine the pressure value based on electrical response signals. The processor is configured to apply a compensation algorithm to correct the determination of the pressure value for the dependence of the electrical response signals on the distance between the pressure sensor and the field generator, the phase of the mechanical oscillation of the magnetic object, the orientation of the housing relative to the reading system, the amplitude of the mechanical oscillation of the magnetic object. When executing the method, an excitation field is generated to induce mechanical oscillations of the magnetic object of the pressure sensor. Transform the field into response signals. The pressure value is determined based on the electrical response signals.

EFFECT: pressure measurement sensor is provided for introduction into a human circulatory system, improving the accuracy of pressure measurement using such a sensor.

15 cl, 34 dwg