Electronic blood pressure measuring apparatus

Claim 1

In an electronic pressure measuring apparatus comprising pressure detecting means operatively connected with a cuff for detecting a pressure at the cuff, Korotkoff sound detecting means associated with the cuff for detecting any Korotkoff sound output signal and verifying means operative in response to the Korotkoff sound detecting means output signal generated by the Korotkoff sound detecting means for determining systolic and diastolic blood pressures, the improvement comprising signal detecting means for detecting the generation of a Korotkoff sound detecting means output signal by said Korotkoff sound detecting means and generating a signal detecting means output signal and indicator means operative in response to said signal detecting means output signal for displaying the generation of said Korotkoff sound detecting means output signal, wherein said signal detecting means includes a check switch and an AND circuit adapted to receive both an output signal from said check switch and said Korotkoff sound detecting means output signal, the check switch further being adapted so that prior to a blood pressure measurement the check switch is closed and remains in an "on" position for a predetermined time period, and wherein said signal detecting means further includes a display means operative in response to the AND circuit that signals the generation of said Korotkoff sound detecting means output signal by said indicator means as a warning signal of an improper measurement condition.