研究目的
Investigating the bilateral differences in second derivative photoplethysmography signals and their relationship with arterial stiffness.
研究成果
Bilateral differences in SDPPG signals, specifically higher amplitudes of waves a and c in the right hand, indicate potential use as a non-invasive indicator of arterial stiffness. Further studies with larger and diverse samples are recommended.
研究不足
The study was limited to 30 subjects and did not include individuals with cardiovascular diseases. The results may not be generalizable to all populations.
1：Experimental Design and Method Selection:
The study used second derivative photoplethysmography (SDPPG) to record signals from both hands. Signals were processed to extract wave amplitudes (a, b, c, d, e).
2：Sample Selection and Data Sources:
30 subjects with no diagnosed diseases, aged between 18 and 99 years, were selected.
3：List of Experimental Equipment and Materials:
SDPPG sensors, data acquisition system, MATLAB for signal processing.
4：Experimental Procedures and Operational Workflow:
SDPPG signals were recorded from left and right index fingers. Signals were filtered and normalized. Wave amplitudes were extracted and compared between hands.
5：Data Analysis Methods:
Statistical analysis using paired t-tests to compare amplitudes between left and right hands.
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