ArticleAnnals of biomedical engineering2026
Smartphone-based Assessment of Vasomotor Function via Fingertip Arteriolar Elasticity Using the Volume-Oscillometric Method with Green Light Photoplethysmography.
Article in Annals of biomedical engineering, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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3 authors.
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Abstract
purposeVasomotor function plays a critical role in blood pressure (BP) regulation and organ perfusion, and its dysfunction is a major risk factor for cardiovascular disease. Despite the clinical importance of early detection, no noninvasive, quantitative, and widely accessible method for evaluating vasomotor function currently exists. To address this gap, we propose a novel smartphone-based technique for assessing vasomotor activity by measuring fingertip arteriolar elasticity.
methodsA smartphone (iPhone) equipped with green light photoplethysmography (gPPG) was coupled to a detachable fingertip pressurization unit to enable volume-oscillometric measurement of arteriolar BP and elasticity indices (stiffness and distensibility) as functions of distending pressure. Vasoconstriction was induced by cold stimulation to validate the method.
resultsThirteen healthy volunteers underwent measurements before and during cold water immersion of the contralateral hand. The method successfully quantified arteriolar BP and elasticity indices, revealing significant increases in stiffness and decreases in distensibility (p < 0.01), consistent with expected vasoconstrictive responses.
conclusionThis smartphone-based approach demonstrates feasibility as a practical, noninvasive, and accessible tool for assessing vasomotor activity. With further validation in larger cohorts, it may enable early detection of vasomotor dysfunction and support cardiovascular disease prevention through convenient self-assessment.
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