Pulse Wave Analysis Digital Plethysmography Finger Plethysmography Accelerated Plethysmography Clinical Bottom Line - The Simple Explanation
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چکیده
The digital plethysmograph is a secondary output of the pulse oximeter, which is commonly used to measure arterial blood saturation (SaO2)61. Digital plethysmography provides noninvasive, continuous, and real-time measurement of arterial pressure with infrared light transmitted through a digit (finger or toe)62. This technique acquires the digital volume pulse (DVP), a waveform that estimates pulse wave velocity (PWV). Blood pressure is a component of the PWV, which is the standard measure of arterial stiffness (a major CVD risk factor)63,64. DVP measured by digital plethysmography has been shown to be a reliable and reproducible technique for indirectly determining arterial stiffness indices (SI)65.
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We investigated a non-invasive measurement for changes in finger blood flow during wakefulness and sleep. Changes in finger blood flow, reflected by pulse wave amplitude (PWA) derived from finger plethysmography, were compared with changes in forearm vascular flow assessed by venous occlusion plethysmography after intra-arterial infusion of norepinephrine (NE), phentolamine, and isoproterenol (...
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