Reliability and Quality of Complex Systems
Background. Relevance and objectives. The reliability of pressure transmission from the artery wall to the hydrocuff during decompression significantly depends on the values of the amplitude-frequency characteristics of the pulse waves. Low-frequency bandpass filters remove part of the useful high-f...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penza State University Publishing House
2025-02-01
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| Series: | Надежность и качество сложных систем |
| Subjects: | |
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| Summary: | Background. Relevance and objectives. The reliability of pressure transmission from the artery wall to the hydrocuff during decompression significantly depends on the values of the amplitude-frequency characteristics of the pulse waves. Low-frequency bandpass filters remove part of the useful high-frequency signal along with noise. This leads to errors in determining the transfer function of the artery-tissue-hydrocuff system, established in the identification process. The article is devoted to determining the amplitude-frequency characteristics of pulse waves generated by the hydrocuff during decompression. It has been established that the high sensitivity of the hydrocuff tonometer allows detecting and highlighting high-frequency spectral characteristics in the signals of the hydrocuff pressure sensor. Materials and methods. The process of transmitting the pressure generated by the pulse wave in the artery to the pressure sensor is considered as a process of propagation of elastic disturbances in the wave channel, which includes the walls of the brachial artery, the musculoskeletal tissues of the shoulder, the cuff, the connecting tube and the pressure sensor. To prove the presence of a high-frequency component in the pressure sensor signals, the singular value decomposition procedure was used. Results and conclusions. Comparison of the air and liquid working environment showed that the transmission coefficient of the water channel, in the working frequency range, is approximately 17 times greater than the transmission coefficient of the air channel, and the phase distortion coefficient is four times smaller. The highfrequency spectrum of the signal lies within the range from 100 to 400 Hz. |
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| ISSN: | 2307-4205 |