ArticleSensors (Basel, Switzerland)2021
Effects of Contact Pressure in Reflectance Photoplethysmography in an In Vitro Tissue-Vessel Phantom.
Article in Sensors (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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Who cites it
16 citing papers in PubMed.
- Real-Time SpOSensors (Basel, Switzerland) · 2026Article
- Mechanical Contact Conditions in Wearable Reflectance Photoplethysmography: Scoping Review.JMIR mHealth and uHealth · 2026Article
- Reliable wrist PPG monitoring by mitigating poor skin sensor contact.Scientific reports · 2025Article
- Development of a dynamic pulsatile phantom for the photoplethysmographic waveform at the radial artery.Journal of biomedical optics · 2025Article
- Exploration of the Conditions for Occurrence of Photoplethysmographic Signal Inversion above the Dorsalis Pedis Artery.Sensors (Basel, Switzerland) · 2024Article
- Development and characterization of silicone-based tissue phantoms for pulse oximeter performance testing.Journal of biomedical optics · 2024Article
- Evaluating Vascular Depth-Dependent Changes in Multi-Wavelength PPG Signals Due to Contact Force.Sensors (Basel, Switzerland) · 2024Article
- Tissue mimicking materials and finger phantom design for pulse oximetry.Biomedical optics express · 2024Article
- Customisable Silicone Vessels and Tissue Phantoms for In Vitro Photoplethysmography Investigations into Cardiovascular Disease.Sensors (Basel, Switzerland) · 2024Article
- Arterial stiffness assessment using PPG feature extraction and significance testing in an in vitro cardiovascular system.Scientific reports · 2024Article
- Photoplethysmography for the Assessment of Arterial Stiffness.Sensors (Basel, Switzerland) · 2023Review
- The 2023 wearable photoplethysmography roadmap.Physiological measurement · 2023Review
- Changes in beat-to-beat blood pressure and pulse rate variability following stroke.Scientific reports · 2023Article
- Recent Progress in Flexible and Wearable All Organic Photoplethysmography Sensors for SpOAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2023Review
- A new method of continuous blood pressure monitoring using multichannel sensing signals on the wrist.Microsystems & nanoengineering · 2023Article
- Intra-beat biomarker for accurate continuous non-invasive blood pressure monitoring.Scientific reports · 2022Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
With the continued development and rapid growth of wearable technologies, PPG has become increasingly common in everyday consumer devices such as smartphones and watches. There is, however, minimal knowledge on the effect of the contact pressure exerted by the sensor device on the PPG signal and how it might affect its morphology and the parameters being calculated. This study explores a controlled in vitro study to investigate the effect of continually applied contact pressure on PPG signals (signal-to-noise ratio (SNR) and 17 morphological PPG features) from an artificial tissue-vessel phantom across a range of simulated blood pressure values. This experiment confirmed that for reflectance PPG signal measurements for a given anatomical model, there exists an optimum sensor contact pressure (between 35.1 mmHg and 48.1 mmHg). Statistical analysis shows that temporal morphological features are less affected by contact pressure, lending credit to the hypothesis that for some physiological parameters, such as heart rate and respiration rate, the contact pressure of the sensor is of little significance, whereas the amplitude and geometric features can show significant change, and care must be taken when using morphological analysis for parameters such as SpO2 and assessing autonomic responses.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.