Low signal strength on a plethysmogram may indicate which of the following?

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Quizplus · Accepted Answer

Because of this technique, the pulse oximeter also provides a plethysmogram displayed on almost all bedside monitor which is a vital piece of information-its amplitude indicates the confidence in the signal, and therefore the oximetry reading. A blunted plethysmogram should diminish confidence in the oximetry reading, which often varies widely when signal strength is low. Most often, signal strength is low due to either probe malposition, or else poor perfusion, low stroke volume, or elevated SVR.

Low Signal Strength on a Plethysmogram May Indicate Which of the Following