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Toe pressure determination by audiophotoplethysmography

A Fronek¹, V Blazek, B Curran

¹Department of Surgery, University of California, San Diego, La Jolla 92093-0643.

Journal of Vascular Surgery

|August 1, 1994

Summary

Audio-photoplethysmography offers a reliable method for measuring toe pressure without a recorder, proving effective in both healthy individuals and those with arterial occlusive disease.

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Area of Science:

Vascular Medicine
Diagnostic Technology

Background:

Toe pressure measurement is crucial for diagnosing peripheral arterial disease.
Traditional methods often require cumbersome recording equipment.

Purpose of the Study:

To assess the efficacy of audio-photoplethysmography for toe pressure measurement.
To determine if this method can be used without a recorder.

Main Methods:

A portable photoplethysmograph with audio output was utilized.
Results were compared against a standard commercial photoplethysmograph with a recorder.

Main Results:

Measurements were taken from 31 control subjects and 62 patients with arterial occlusive disease.
Audio-photoplethysmography showed insignificant differences and very good correlation with the standard method.
Average toe pressures were 95.9 mm Hg (audio) vs. 103.5 mm Hg (standard) in controls, and 61.6 mm Hg (audio) vs. 65.3 mm Hg (standard) in patients.

Conclusions:

Audio-photoplethysmography is a valid and reliable tool for toe pressure measurement.
The absence of a recorder simplifies the procedure, potentially increasing its use in clinical practice.

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