Which of the following is explicitly listed as a standard monitor in AANA guidelines?

• A. Pulse Oximetry
• B. Ventilation by clinical observation only
• C. Temperature check with a thermometer
• D. Blood pressure palpation

Answer: (A)

Focusing on continuous, objective patient monitoring is the key idea. Pulse oximetry is explicitly listed as a standard monitor because it provides real-time, noninvasive measurement of oxygen saturation and pulse rate, allowing immediate detection of hypoxemia or circulatory problems during anesthesia. This continuous data helps guide timely interventions to keep the patient safe.

The other options don’t meet the standard in the same way. Ventilation by clinical observation only relies on subjective assessment and may miss early problems with ventilation or airway patency; objective ventilation monitoring (like capnography) is preferred to give a clear readout of CO2 levels. Temperature monitoring with a thermometer isn’t universally designated as a standard monitor for all anesthesia cases in the guidelines, though it can be important in certain situations. Palpation of blood pressure alone doesn’t provide continuous, quantitative data and can miss rising or falling pressures; continuous noninvasive blood pressure monitoring (or an arterial line when indicated) is the standard practice.