Anaes Vivas · Measurement & monitoring physics
Equipment viva — the pulse oximeter probe
An equipment viva on the pulse oximeter — the two LEDs (red 660 nm, infrared 940 nm), the photodetector, the pulsatile-addition method, and the calibration range.
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Prompt
A finger pulse oximeter probe and a monitor showing the plethysmograph and the saturation. Describe how it works, what the two LEDs do, and how it isolates the arterial signal.
Stimulus
This is a finger pulse oximeter probe, and the monitor shows the plethysmograph and the saturation reading. Describe how it works, what the two light sources do, and how it isolates the arterial saturation.
References2ShowHide
- [1]Moon K, et al. Pulse oximetry - a perioperative perspective. Diagnostics, 2026.PMID 42351472
- [42351473]Bersten AD, Soni N (eds) Oh's Intensive Care Manual. 8th edition, Elsevier, 2018.