Paperdoi:10.3390/s23115016

Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure

Venue listed2023Added Oct 29, 2026

Authors: Jorge Herranz Olazábal, Ilde Rosa Lorato, Jesse Kling, Marc Verhoeven, Fokko Pieter Wieringa, Chris A. Van Hoof, Willem Verkruijsse, Evelien Hermeling (Imec the Netherlands; Philips (Netherlands))

Sensors 23(11):5016, 2023

Publisher PubMed Cite

CC BY 4.0 (OpenAlex)

Jorge Herranz Olazabal et al., "Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure", doi:10.3390/s23115016, CC BY 4.0

TL;DR

Ten people did a cold pressor test (hand in ice water) to cut finger blood flow while speckle plethysmography (SPG) and PPG were recorded from the same video at 639 and 850 nm. Both signals weakened, but SPG kept a significantly higher and more stable signal-to-noise ratio than PPG throughout and showed richer harmonics.

Form factor: finger

Abstract

Speckle Plethysmography (SPG) and Photoplethysmography (PPG) are different biophotonics technologies that allow for measurement of haemodynamics. As the difference between SPG and PPG under low perfusion conditions is not fully understood, a Cold Pressor Test (CPT—60 s full hand immersion in ice water), was used to modulate blood pressure and peripheral circulation. A custom-built setup simultaneously derived SPG and PPG from the same video streams at two wavelengths (639 nm and 850 nm). SPG and PPG were measured at the right index finger location before and during the CPT using finger Arterial Pressure (fiAP) as a reference. The effect of the CPT on the Alternating Component amplitude (AC) and Signal-to-Noise Ratio (SNR) of dual-wavelength SPG and PPG signals was analysed across participants. Furthermore, waveform differences between SPG, PPG, and fiAP based on frequency harmonic ratios were analysed for each subject (n = 10). Both PPG and SPG at 850 nm show a significant reduction during the CPT in both AC and SNR. However, SPG showed significantly higher and more stable SNR than PPG in both study phases. Harmonic ratios were found substantially higher in SPG than PPG. Therefore, in low perfusion conditions, SPG seems to offer a more robust pulse wave monitoring with higher harmonic ratios than PPG.

Verbatim from the publisher's DOI record (opens in a new tab) · Publisher licence: https://creativecommons.org/licenses/by/4.0/

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Tasks & signals

Signals

PPG fiAP ref SPG

Keywords

Speckle PlethysmographyCold PressorLow PerfusionSnrHarmonicsImec

How it works

Wavelengths: 639 nm, 850 nm

Cite this paper

Cite this paper with the fields recorded here. Check it against the publisher before submitting.

Olazábal, J. H., Lorato, I. R., Kling, J., Verhoeven, M., Wieringa, F. P., Van Hoof, C. A., Verkruijsse, W., & Hermeling, E. (2023). Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure. Sensors , 2023, 23(11), 5016. https://doi.org/10.3390/s23115016

Olazábal, Jorge Herranz, Ilde Rosa Lorato, Jesse Kling, Marc Verhoeven, Fokko Pieter Wieringa, Chris A. Van Hoof, Willem Verkruijsse, and Evelien Hermeling. 2023. "Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure." Sensors , 2023 23 (11): 5016. https://doi.org/10.3390/s23115016.

Olazábal, J. H., Lorato, I. R., Kling, J., Verhoeven, M., Wieringa, F. P., Van Hoof, C. A., Verkruijsse, W. and Hermeling, E. (2023) 'Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure', Sensors , 2023, 23(11), p. 5016. doi: 10.3390/s23115016.

Olazábal, Jorge Herranz, et al. "Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure." Sensors , 2023, vol. 23, no. 11, 2023, p. 5016. https://doi.org/10.3390/s23115016.

J. H. Olazábal et al., "Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure," Sensors , 2023, vol. 23, no. 11, p. 5016, 2023, doi: 10.3390/s23115016.

@article{olazabal2023comparison,
  title         = {{Comparison between Speckle Plethysmography and Photoplethysmography during Cold Pressor Test Referenced to Finger Arterial Pressure}},
  author        = {Olazábal, Jorge Herranz and Lorato, Ilde Rosa and Kling, Jesse and Verhoeven, Marc and Wieringa, Fokko Pieter and Van Hoof, Chris A. and Verkruijsse, Willem and Hermeling, Evelien},
  year          = {2023},
  journal       = {Sensors , 2023},
  volume        = {23},
  number        = {11},
  pages         = {5016},
  doi           = {10.3390/s23115016}
}

Oct 29, 2026Added to the ChatPPG research hub