1 results about "Korotkoff sounds" patented technology

This disclosure relates to a blood pressure monitor and a method for detecting the working status of a blood pressure detection circuit. The blood pressure monitor includes: a signal generation circuit for generating an excitation signal; a blood pressure detection circuit including a piezoelectric Korotkoff sound sensor electrically connected to the signal generation circuit and outputting a response signal based on the excitation signal; a differential circuit electrically connected to the piezoelectric Korotkoff sound sensor for acquiring the response signal and performing differential processing on the acquired response signal and a reference signal to obtain a differential result; and a processing circuit electrically connected to the differential circuit for determining the working status of the blood pressure detection circuit based on the differential result. This disclosure verifies the working status of the blood pressure detection circuit by acquiring the response signal generated by the excitation, thereby enabling the blood pressure monitor to perform a self-test of the blood pressure detection circuit before blood pressure measurement, thus determining in advance whether the blood pressure monitor can detect blood pressure normally.