The pulse oximeter is a small, clip-like device. It attaches to a body part, most commonly to a finger. Medical professionals often use them in critical care settings like emergency rooms or.
[Source 15)] Causes of intermittent drop-outs or inability to read pulse oximeter SpO2. It is common knowledge that an attenuated and/or inconsistent wave tracing generated by pulse oximeters displayed on intensive care unit monitors is an indication that the SpO2 reading is unreliable or may become so, i.e., increased drop outs or false transient SpO2 changes.
Principles of pulse oximetry. The technique of pulse oximetry has been previously described [].Using spectrophotometric methodology, pulse oximetry measures oxygen saturation by illuminating the skin and measuring changes in light absorption of oxygenated (oxyhemoglobin) and deoxygenated blood (reduced hemoglobin) using two light wavelengths: 660 nm (red) and 940 nm (infrared) [1,2] (Fig. 1).
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