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Multispectral Optoacoustic Tomography for Functional Imaging in Vascular Research
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What Does the Photoplethysmography Add to Laser Doppler Flowmetry During the Brachial Artery Occlusion Test?

Vasily Karpov1, Alexey Glazkov1, Denis Lapitan1

  • 1Laboratory of Medical and Physics Research, Moscow Regional Research and Clinical Institute ("MONIKI") Named After M.F. Vladimirsky, Moscow, Russia.

Journal of Biophotonics
|August 31, 2026
PubMed

Keywords:
arterial occlusionblood flowlaser Doppler flowmetrylocal hemodynamicsmicrocirculatory bedoptical fluctuation flowmetryperfusionphotoplethysmographyraw signal

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Blood pressure measurement is a fundamental clinical procedure, providing crucial data for assessing cardiovascular health. Among the various sites for this measurement, the brachial and popliteal arteries are predominantly utilized due to their accessibility and the reliability of their readings. This lesson delves into the anatomical significance, methodology, and considerations of measuring blood pressure at these locations.
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Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...
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