What is the primary function of a pulse oximeter during anaesthesia?

• A. To monitor heart rate
• B. To check blood glucose levels
• C. To continuously monitor oxygen saturation levels
• D. To assess blood pressure

Answer: (C)

The primary function of a pulse oximeter during anaesthesia is to continuously monitor oxygen saturation levels in the blood. This device is crucial in ensuring that the patient is receiving an adequate supply of oxygen throughout the surgical procedure. By measuring the percentage of hemoglobin that is saturated with oxygen, the pulse oximeter helps anaesthetists detect hypoxemia (low blood oxygen levels) early. This real-time monitoring allows for prompt interventions to maintain appropriate oxygen levels, crucial for patient safety under anaesthesia.

While monitoring heart rate, blood glucose levels, and blood pressure are important components of patient monitoring during anaesthesia, they do not directly relate to the function of a pulse oximeter. The specific role of the pulse oximeter is focused solely on assessing oxygen saturation, making it an indispensable tool for ensuring the well-being of patients in an anaesthetic environment.