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A pulse oximeter probe applied to a person's finger. A pulse oximeter is a medical device that indirectly monitors the oxygen saturation of a patient's blood (as opposed to measuring oxygen saturation directly through a blood sample) and changes in blood volume in the skin, producing a photoplethysmogram that may be further processed into other measurements. [4]
[1] [2] A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. [3] A conventional pulse oximeter monitors the perfusion of blood to the dermis and subcutaneous tissue of the skin. Finger pulse oximeter. With each cardiac cycle the heart pumps blood to the periphery. Even though ...
Pulse oximetry is a method used to estimate the percentage of oxygen bound to hemoglobin in the blood. [10] This approximation to SaO 2 is designated SpO 2 (peripheral oxygen saturation). The pulse oximeter is a small device that clips to the body (typically a finger, an earlobe or an infant's foot) and displays its reading, or transfers it to ...
1. Pulse oximeter 2. Non-invasive blood pressure monitoring 3. Inspired and expired oxygen, carbon dioxide, nitrous oxide and vapour 4. Airway pressure 5. A nerve stimulator whenever a muscle relaxant is used 6. Temperature (pre-op) and for any procedure >30 min anaesthesia duration B. Recovery from anaesthesia. 1. Pulse oximeter 2.
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Recommended Pulse Oximeters. Prices for pulse oximeters range from about $30 for a cheap no-name model up to $300 or more for a professional model.
Oximeter works on the principle of photoplethysmography. Specifically, the working of the oximeter is based on the difference in the light absorption spectrum of oxyhemoglobin and deoxyhemoglobin. Oxyhemoglobin absorbs more infrared light (wavelength of 940 nm) while deoxyhemoglobin absorbs more red light (wavelength of 660 nm).