Contact probe pressure effects in skin multi-spectral photoplethysmography
Abstract
A novel technique ensuring parallel recording of reflection photoplethysmography signals in broad spectral range has been tested for assessment of pressure-induced vascular changes at various depths from the skin surface. PPG signals have been simultaneously detected at three combinations of the cw laser wavelengths 405 nm, 532 nm, 645 nm, 807 nm and 1064 nm. The PPG baseline responses to the probe-skin contact pressure changes and shapes of the PPG pulses originated from the same heartbeat but recorded at different wavelengths have been detected and analyzed.
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For shorter wavelengths, the occlusion pressure was lower, as more superficial arterioles with low mean arterial pressure were in the light path at these wavelengths.
“For shorter wavelengths, the occlusion pressure was lower, as more superficial arterioles with low MAP were in the light path at these wavelengths.”
From Sources of inaccuracy in photoplethysmography for continuous cardiovascular monitoring (2021) · cites this paper as [210]
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The Impact of Contact Force on Signal Quality Indices in Photoplethysmography Measurements
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Core body temperature estimation model with thermal contact resistance compensation
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An in vitro testing system for wrist-worn PPG devices
Bodwell, E., Nguyen, M., Fine, J. N., Scott, K. P., McShane, M. J., & Coté, G. L. (2022) · Optical Diagnostics and Sensing: Toward Point-of-Care Diagnostics · doi:10.1117/12.2607969 · Cited by 2 · see citing works
- Authors
- Spigulis, J., Gailite, L., Erts, R., & Lihachev, A.
- Affiliations
- University of Latvia (LV)
- ORCID
- Lihachev, Alexey
- Venue
- Diagnostic Optical Spectroscopy in Biomedicine IV
- Publisher
- OSA
- Published
- 2007
- Pages
- 6628_55
- OpenAlex
- W3182056462
- Cited by
- 7
- References
- 0
- Citations by year
- 2024: 3 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 1
- FWCI
- 0.00
- Type
- conference paper
- Language
- en
- Open access
- closed
- Locations
- Diagnostic Optical Spectroscopy in Biomedicine (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Non-Invasive Vital Sign Monitoring
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Optical Imaging and Spectroscopy Techniques
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Heart Rate Variability and Autonomic Control
- Keywords
- photoplethysmography, multi-wavelength PPG, contact pressure, vascular response, laser wavelength
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