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Why is monitoring the FIO2 important during anesthesia?

  1. To assess metabolic rate

  2. To ensure proper ventilation

  3. To prevent hypercapnia

  4. To maintain proper oxyhemoglobin saturation

The correct answer is: To maintain proper oxyhemoglobin saturation

Monitoring the fractional inspired oxygen (FIO2) during anesthesia is crucial for maintaining proper oxyhemoglobin saturation. Oxyhemoglobin saturation refers to the percentage of hemoglobin in the blood that is saturated with oxygen. During surgical procedures, it is essential for the patient to receive adequate oxygen to ensure that tissues and organs are well-oxygenated. Anesthesia can affect the patient's respiratory drive and the ability to ventilate properly. By accurately monitoring FIO2, anesthesia providers can ensure that the patient is receiving an appropriate concentration of oxygen, particularly in environments where oxygen availability may be compromised or where a patient’s ability to breathe spontaneously is reduced. This monitoring helps to adjust the oxygen levels delivered to the patient, ensuring that their blood oxygen levels remain within a safe range, thus preventing conditions related to inadequate oxygenation, such as hypoxia. Inadequate monitoring or mismanagement of FIO2 can lead to adverse effects on the patient, including global tissue hypoxia and potential damage to vital organs. Maintaining optimal oxyhemoglobin saturation is vital for overall patient safety and outcomes during and after anesthesia.