Which technique is used to assess a patient's oxygen saturation?

Pulse oximetry is the technique used to assess a patient's oxygen saturation by measuring the amount of oxygen carried by hemoglobin in the blood. This non-invasive method utilizes a sensor typically placed on a fingertip or earlobe, which emits light wavelengths that pass through the skin and into the blood vessels. By analyzing the absorption of these wavelengths, the device can accurately determine the ratio of oxygenated to deoxygenated hemoglobin, providing a real-time measurement of oxygen saturation as a percentage.

This method is widely appreciated for its ease of use, rapid results, and ability to monitor oxygen saturation continuously, making it a critical tool in various clinical settings, including anesthesia.