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_____ is non-invasive method allowing the monitoring of the saturation of a patient’s hemoglobin.

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_____ is non-invasive method allowing the monitoring of the saturation of a patient’s hemoglobin.

(a) Ear Oximetry

(b) Pulse Oximetry

(c) Skin-Reflectance Oximetry

(d) Intravascular Oximetry

I have been asked this question during an internship interview.

My query is from Pulse Oximeter topic in section Oximeters of Biomedical Instrumentation

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Right answer is (b) Pulse Oximetry

To elaborate: Pulse oximetry is a non-invasive method allowing the monitoring of the saturation of a patient’s hemoglobin. A pulse oximeter shows the percentage of arterial hemoglobin in the oxyhemoglobin (HbO2) and hemoglobin (Hb). These observations:

A = -logT = log I0/I =ɛDC.

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