What question did this study set out to answer?

To evaluate the validity and quantitative accuracy of laser-Doppler velocimetry compared to plethysmography for measuring skin blood flow changes during thermal stress.

March 1, 1984Journal of Applied Physiology

Laser-Doppler measurement of skin blood flow: comparison with plethysmography

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To evaluate the validity and quantitative accuracy of laser-Doppler velocimetry compared to plethysmography for measuring skin blood flow changes during thermal stress.
Assessed skin blood flow in four men across five trials during whole-body heating (39°C skin temperature for 50–70 min) using simultaneous laser-Doppler flowmetry and forearm plethysmography.
Measured baseline and mechanically occluded laser-Doppler values across six forearm sites under normothermic conditions in four men.
Laser-Doppler flow correlated strongly with total forearm blood flow within individual trials (r = 0.94–0.98), though regression slopes varied from 40 to 122 mV·ml⁻¹·100 ml·min across trials.
Regional measurements across six forearm sites revealed a 1.8- to 5.7-fold variation in laser-Doppler flow within individual subjects.
Extrapolated laser-Doppler values at zero forearm blood flow ranged from 246 to 599 mV above baseline probe levels, whereas mechanical occlusion values ranged from 110 to 230 mV.

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Implication

Experimental study demonstrates strong relative correlation but high regional variability between laser-Doppler flowmetry and plethysmography in healthy men, indicating challenges for absolute...

Cite This Study

Johnson et al. (1984) studied this question.

synapsesocial.com/papers/6a6f778d31a3df824327d66a https://doi.org/10.1152/jappl.1984.56.3.798

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Implication

Experimental study demonstrates strong relative correlation but high regional variability between laser-Doppler flowmetry and plethysmography in healthy men, indicating challenges for absolute...

Laser-Doppler measurement of skin blood flow: comparison with plethysmography

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Discussion

Implication

Cite This Study

Laser-Doppler measurement of skin blood flow: comparison with plethysmography

Key Points

Discussion

Implication

Cite This Study

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