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What is used in modern instrument for intravascular oximetry?

(a) photodiode

(b) red and infrared LED’s

(c) optical fibre

(d) phototransistor

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Right choice is (c) optical fibre

Best explanation: For intravascular oximetry, modern instruments make use of optical fibres to guide the light signal inside the vessel and the reflected light from the red blood cells back to the light detector.

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