Characteristics of pulse-waveform and laser-Doppler indices in frozen-shoulder patients
| Autor: | Chao Tsung Chen, Feng Cheng Lin, Chung Hua Hsu, Han Si Chiu, Hsin Hsiu |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
business.industry
Pulse (signal processing) 0206 medical engineering Biomedical Engineering Frozen shoulder Health Informatics 02 engineering and technology Blood flow Laser Doppler velocimetry medicine.disease 020601 biomedical engineering 03 medical and health sciences 0302 clinical medicine Blood pressure Amplitude Photoplethysmogram Signal Processing Medicine Waveform sense organs business 030217 neurology & neurosurgery Biomedical engineering |
| Zdroj: | Biomedical Signal Processing and Control. 56:101718 |
| ISSN: | 1746-8094 |
| Popis: | This study tested the hypothesis that measuring and analyzing the arterial pulse waveform and the skin-surface blood flow makes it possible to noninvasively discriminate the different microcirculatory states of patients with frozen shoulder (FS). Radial blood pressure waveform (BPW), finger photoplethysmography (PPG), and skin-surface laser Doppler flowmetry (LDF) signals were measured noninvasively on the back of the hand in 25 FS and 18 control subjects. Beat-to-beat, spectral, and variability analyses were applied to the 3-minute-long recorded signals. Significant intergroup differences were found in the BPW, PPG, and LDF indices. For example, the amplitude indices of the predominant (lower-frequency) BPW components were significantly larger in FS subjects than controls. Some of the PPG phase-angle variability indices were significantly larger on the diseased side than on the contralateral side. The present results illustrate that LDF indices can be used to evaluate the blood-flow-perfusion responses and their regulation, and that pulse-waveform indices can help to evaluate changes in the arterial pulse-wave transmission condition and its regulation in FS. Moreover, the trends in the changes in certain spectral pulse-waveform indices were similar for the wrist BPW and finger PPG signals. These findings could facilitate the development of a rapid, inexpensive, and objective technique for evaluating the blood-flow responses induced by FS. |
| Databáze: | OpenAIRE |
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