Which device measures oxygen saturation during anesthesia?

Which device measures oxygen saturation during anesthesia?

• A. Pulse oximeter
• B. Sphygmomanometer
• C. ECG
• D. Capnograph

Answer: (A)

Measuring oxygen saturation during anesthesia is done with a pulse oximeter. This noninvasive device clips onto a finger, toe, or earlobe and uses two light wavelengths to estimate how much hemoglobin in the arterial blood is carrying oxygen. It tracks the pulsatile blood flow to provide a real-time SpO2 reading, which closely reflects the arterial oxygen saturation and helps clinicians detect hypoxemia quickly so they can adjust oxygen delivery or ventilation as needed. The other devices monitor different things: a sphygmomanometer checks blood pressure, an ECG follows the heart’s electrical activity, and a capnograph measures end-tidal carbon dioxide to assess ventilation. Remember that pulse oximetry can be affected by factors like poor perfusion, nail polish, motion, or certain blood abnormalities that alter the reading.

Measuring oxygen saturation during anesthesia is done with a pulse oximeter. This noninvasive device clips onto a finger, toe, or earlobe and uses two light wavelengths to estimate how much hemoglobin in the arterial blood is carrying oxygen. It tracks the pulsatile blood flow to provide a real-time SpO2 reading, which closely reflects the arterial oxygen saturation and helps clinicians detect hypoxemia quickly so they can adjust oxygen delivery or ventilation as needed.

The other devices monitor different things: a sphygmomanometer checks blood pressure, an ECG follows the heart’s electrical activity, and a capnograph measures end-tidal carbon dioxide to assess ventilation. Remember that pulse oximetry can be affected by factors like poor perfusion, nail polish, motion, or certain blood abnormalities that alter the reading.