| 摘要 |
<p>Blood pressure measuring equipment comprises a sleeve (1) with an inflatable air chamber (31) and a microphone (33), and an appliance (3) for measurement and indication of systolic and diastolic blood blood pressure. Sound signals delivered by the microphone (33) during measurement are fed through filter means (51) to a discriminator (53) which generates a pulse for each Korotkoff sound. Diastolic pressure is measured on the last pulse that is formed with the air chamber decreasing. The transfer function of the filter means (51) can be changed in such a manner that diastolic pressure is measured selectably at the so-called fourth or fifth Korotkoff sound eg. by using a transfer function characterised by an enhanced lower frequency transmission to detect the softer fifth Korotkoff sound. In this manner, the blood pressure measurement can be adapted to the individual characteristics of a patient. <IMAGE></p> |
