and deoxygenated hemoglobin. A pulseoximetercontains 2 high-intensity, monochromatic, light-emitting diodes (LEDs); 1 emitting red light (660 nm) and the second infrared (940 nm). A photodetector, usually locate
How does a pulse oximeter function? A pulse oximeter works by passing a beam of red and infrared light through a pulsating capillary bed. The ratio of red to infrared blood light transmitted gives a measure of the oxygen saturation of the blood. The oximeter works on the principle that the ...
The pulse oximeter uses a special type of light to see how much oxygen is in the red blood cells traveling through the blood vessels under your skin. The test is painless and quick. In just a few seconds, the device will show your heart rate and oxygen saturation level — the percentage...
theoximeter’sdisplaythroughelectroniccircuitsandamicroprocessor. DiagramofOperationPrinciple 1.RedandInfrared-rayEmissionTube 2.RedandInfrared-rayReceiptTube PrecautionsForUse 1Beforeuse,carefullyreadthemanual. 2Operationofthefingertippulseoximetermaybeaffectedbytheuseofanelectrosurgicalunit(ESU). ...
[59] found that a PI < 2 was related to increased bias in SpO2 and arterial oxygen saturation on three types of pulse oximeters. For CBG, Desachy et al. [60] found that a low PI was independently associated with poor capillary glucose test strip performance. The accuracy of the ...
(PWTT). This technique is predicated on the notion that the time fromcardiac contractionto the generation of a pulse is inversely related to CO. The PWTT can be measured as the time from the electrocardiogram R-wave peak to the rise point of the pulse oximeter waveform (the point at which...