| 摘要 |
The proposed oscillometric method of determining haemodynamic indicators in the arterial circulation of a patient involves recording pressure pulse waves (3) in a main vessel (1) which is subjected to linearly changing pressure (2) in a measurement pressure cuff (10). On the basis of this, a closed profile (ABCDLKFE) is formed during one measurement cycle, the profile consisting of the straight lines (A B), (B C), and (C D) in the diastolic part of the oscillometric curve (4) and of the lines (E F), (F K) and (K L) in the systolic part. The intersection points (B), (C), (F) and (K) indicate arterial pressure, while the amplitude values (Cc) and (Bb) of the pulse waves (3) in the profile define the geometrical parameters (dS) and (S) of the main artery (1) in question. The measurement system for applying this method has a linear amplitude conversion characteristic and a rectilinear horizontal amplitude-frequency characteristic in a frequency range of between approximately 0 and 50 Hz across the entire signals conversion, amplification and recording channel.
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