The waveform displayed by a pulse oximeter is called a:

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Multiple Choice

The waveform displayed by a pulse oximeter is called a:

Explanation:
The pulse oximeter waveform comes from photoplethysmography, which tracks changes in blood volume in the tissue with each heartbeat. This trace is called a plethysmographic waveform, or pleth for short. It reflects arterial pulse and peripheral perfusion, not electrical activity, CO2, or lung volumes. It’s not an electrocardiogram, which shows the heart’s electrical signals; it’s not a capnograph, which displays a CO2 waveform; and it’s not a spirogram, which comes from spirometry showing airflow and lung volumes.

The pulse oximeter waveform comes from photoplethysmography, which tracks changes in blood volume in the tissue with each heartbeat. This trace is called a plethysmographic waveform, or pleth for short. It reflects arterial pulse and peripheral perfusion, not electrical activity, CO2, or lung volumes.

It’s not an electrocardiogram, which shows the heart’s electrical signals; it’s not a capnograph, which displays a CO2 waveform; and it’s not a spirogram, which comes from spirometry showing airflow and lung volumes.

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