Local orthostatic maneuver in the optical diagnosis of peripheral blood oxygenation

Sylwester Nowocień

doi:10.1117/12.2525929

21 June 2019 Local orthostatic maneuver in the optical diagnosis of peripheral blood oxygenation

Sylwester Nowocień

Proceedings Volume 11060, Optical Methods for Inspection, Characterization, and Imaging of Biomaterials IV; 110601I (2019) https://doi.org/10.1117/12.2525929
Event: SPIE Optical Metrology, 2019, Munich, Germany

Abstract

The main goal of this work was to verify the hypothesis about the possibility of inducing small artificial venous pulsations in the terminal area of the forearm vascular tree by using a local orthostatic maneuver. That pulsations could be used for measurement, of the regional venous blood oxygenation (rSvO₂) without any additional apparatus as it is practiced in the classic occlusion method. The complexity of the research object, as well as dynamically changing environmental and hemodynamic conditions that occurs in this type of measurement, significantly impedes the comprehensive analysis of anatomical reactions occurring during the implementation of the mentioned maneuver. For that reason, research was done by the modified HOMS model. The basic variant of the chosen model was expanded by a quasi–hydrostatic factor P_h(t) affecting on the area under consideration. The extension was realized by using the complex θ_δ[abc]function, defined in details in chapter 3. The results obtained during the work indicate the possibility of obtaining venular quasi–pulsations several times higher (modulation ratio M_V ≈ 30%) than the arterial pulsations observed for the typical pulse oximetry (typical M_A = 1 ÷ 2%). This confirms the hypothesis given in the introduction and proves the possibility of inducing pulsations with using the local orthostatic maneuver. Moreover, obtained values of the coefficient MV show the potential possibility of the empirical detection with using standard pulse oximetry tools.

Citation Download Citation

Sylwester Nowocień "Local orthostatic maneuver in the optical diagnosis of peripheral blood oxygenation", Proc. SPIE 11060, Optical Methods for Inspection, Characterization, and Imaging of Biomaterials IV, 110601I (21 June 2019); https://doi.org/10.1117/12.2525929

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KEYWORDS

Blood

Photoplethysmography

Analytical research

Oximetry

Oxygen

Hemodynamics

Metrology

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