Effects of different contacting pressure on the transfer function between finger photoplethysmographic and radial blood pressure waveforms
Effects of different contacting pressure on the transfer function between finger photoplethysmographic and radial blood pressure waveforms
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DOI：
10.1177/0954411910396288
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发表时间：
2011-01-01
期刊：
影响因子：
1.8
通讯作者：
Wu, T-L
中科院分区：
文献类型：
--
作者：
Hsiu, H.;Hsu, C-L;Wu, T-L
背景：血压（BP）波形被建议反映全身血供分布，但其无创评估在实际应用中不够用户友好。本文作者研究了BP与光容积脉搏波（PPG）波形之间的相关性，目的是确定接触压力刺激（PS）的最佳范围，从而在其谐波参数中产生可靠的传递函数。方法：对45名健康志愿者同时进行无创测量手指PPG和桡动脉血压信号。在手指上施加0 ~ 200 mmHg的PS，记录1分钟的数据序列。在频域分析中，对计算得到的BP和PPG波形的振幅比或前五次谐波进行线性回归。结果：在60 mmhgp组，BP-PPG回归的幅度比最高，Bland-Altman分析也验证了两者之间的一致性。结论：本研究通过频域分析研究了BP与PPG波形的相关性。压力诱导的血管舒张反应的差异是应用不同ps获得的不同BP-PPG波形相关性的基础。无创提取的PPG参数有助于提供一种更容易获得桡动脉血压波形的方法，从而扩大血压波形分析的应用范围。
Background: The blood pressure (BP) waveform is suggested to reflect the whole-body blood supply distribution, but its non-invasive assessment is not sufficiently user friendly for practical applications. The present authors studied the correlation between BP and photo-plethysmography (PPG) waveforms, with the aim of determining the optimal range for contact pressure stimulation (PS) to produce a reliable transfer function in their harmonic parameters. Methods: Finger PPG and radial-artery BP signals were measured simultaneously and non-invasively on healthy volunteers (n = 45). PS of 0-200 mmHg was applied to the finger, and 1 min data sequences were recorded. In frequency-domain analysis, linear regression was applied to the calculated amplitude ratios or the first five harmonics between BP and PPG waveforms. Results: In the 60 mmHgPS group, the BP-PPG regression of amplitude ratios was highest, and the agreements between them were also the best verified by Bland-Altman analysis. Conclusion: In the present study, frequency-domain analysis was performed to study the correlation between BP and PPG waveforms. Differences in pressure-induced-vasodilation responses underlie the different BP-PPG waveform correlations obtained by applying different PSs. The non-invasively derived PPG parameters might help to provide an easier method to acquire the radial-artery BP waveform, and hence broaden the application of BP waveform analysis.