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Paperdoi:10.1364/BOE.482740

Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy

Venue listed2023Added Oct 29, 2026

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Authors: Ariane Garrett, Byungchan Kim, Edbert Jarvis Sie, Nil Z. Gurel, Francesco Marsili, David A. Boas, Darren M. Roblyer (Boston University)

Biomedical Optics Express 14(4):1594, 2023

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TL;DR

Speckle contrast optical spectroscopy (SCOS) records both a PPG-like blood-volume signal and a blood-flow index from the same light. On the finger and wrist of 13 people, blood-flow features correlated with blood pressure slightly better than PPG features, and features combining flow and volume correlated best (R = −0.59).

  • Form factor: wrist

Abstract

Non-invasive continuous blood pressure monitoring remains elusive. There has been extensive research using the photoplethysmographic (PPG) waveform for blood pressure estimation, but improvements in accuracy are still needed before clinical use. Here we explored the use of an emerging technique, speckle contrast optical spectroscopy (SCOS), for blood pressure estimation. SCOS provides measurements of both blood volume changes (PPG) and blood flow index (BFi) changes during the cardiac cycle, and thus provides a richer set of parameters compared to traditional PPG. SCOS measurements were taken on the finger and wrists of 13 subjects. We investigated the correlations between features extracted from both the PPG and BFi waveforms with blood pressure. Features from the BFi waveforms were more significantly correlated with blood pressure than PPG features (

R  = − 0.55, p  = 1.1 × 10 −4

for the top BFi feature versus

R  = − 0.53, p  = 8.4 × 10 −4

for the top PPG feature). Importantly, we also found that features combining BFi and PPG data were highly correlated with changes in blood pressure (

R  = − 0.59,

p

= 1.7 × 10 −4

). These results suggest that the incorporation of BFi measurements should be further explored as a means to improve blood pressure estimation using non-invasive optical techniques.

Verbatim from the publisher's DOI record (opens in a new tab) · Publisher licence: https://doi.org/10.1364/OA_License_v2#VOR-OA

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Tasks & signals

Tasks

Blood pressure

Signals

PPGBPBFiSCOS

Keywords

Speckle PlethysmographyCuffless BPWristBoston UniversityMeta

How it works

How Method works: Setup → Method → TargetSetup: Signals (SCOS, PPG, BFi, BP ref); Wavelengths (laser (λ not in abstract)); Form factor (wrist). Method: Method. Target: Blood pressure.SetupSignals: SCOS, PPG, BFi, BP refSignalsSCOS, PPG, BFi, BP refWavelengths: laser (λ not in abstract)Wavelengthslaser (λ not in abstract)Form factor: wristForm factorwristMethodMethodTargetBlood pressureBlood pressure
Wavelengths
laser (λ not in abstract)

Cite this paper

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

Garrett, A., Kim, B., Sie, E. J., Gurel, N. Z., Marsili, F., Boas, D. A., & Roblyer, D. M. (2023). Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy. Biomedical Optics Express , 2023, 14(4), 1594. https://doi.org/10.1364/BOE.482740
Garrett, Ariane, Byungchan Kim, Edbert Jarvis Sie, Nil Z. Gurel, Francesco Marsili, David A. Boas, and Darren M. Roblyer. 2023. "Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy." Biomedical Optics Express , 2023 14 (4): 1594. https://doi.org/10.1364/BOE.482740.
Garrett, A., Kim, B., Sie, E. J., Gurel, N. Z., Marsili, F., Boas, D. A. and Roblyer, D. M. (2023) 'Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy', Biomedical Optics Express , 2023, 14(4), p. 1594. doi: 10.1364/BOE.482740.
Garrett, Ariane, et al. "Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy." Biomedical Optics Express , 2023, vol. 14, no. 4, 2023, p. 1594. https://doi.org/10.1364/BOE.482740.
A. Garrett et al., "Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy," Biomedical Optics Express , 2023, vol. 14, no. 4, p. 1594, 2023, doi: 10.1364/BOE.482740.
@article{garrett2023simultaneous,
  title         = {{Simultaneous photoplethysmography and blood flow measurements towards the estimation of blood pressure using speckle contrast optical spectroscopy}},
  author        = {Garrett, Ariane and Kim, Byungchan and Sie, Edbert Jarvis and Gurel, Nil Z. and Marsili, Francesco and Boas, David A. and Roblyer, Darren M.},
  year          = {2023},
  journal       = {Biomedical Optics Express , 2023},
  volume        = {14},
  number        = {4},
  pages         = {1594},
  doi           = {10.1364/BOE.482740}
}

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