Before a case, what safety checks should be performed on the anesthesia machine?

• A. Verify oxygen supply, gas pressures, leak test, battery/power status, functional monitors, suction, and correct circuit connections.
• B. Only check the battery status.
• C. Only check oxygen supply.
• D. Verify only the patient identity.

Answer: (A)

Before a case, ensuring the anesthesia machine is safe means confirming all essential systems are ready for reliable gas delivery and patient monitoring. Start with the oxygen supply and gas pressures to guarantee the machine can deliver the correct oxygen concentration and flow; this prevents hypoxemia and ensures proper ventilation. A leak test is then performed to verify there are no hidden leaks in the breathing circuit, connections, or vaporizers, so the system remains airtight and predictable during use. Checking the battery or power status is crucial for backup power if mains power fails, protecting ventilation and monitoring continuity. Functional monitors must be tested so alarms and readings (like capnography, pulse oximetry, ECG, blood pressure, etc.) accurately reflect the patient’s status. Suction readiness is important to clear the airway or manage secretions during induction and emergence. Finally, confirming correct circuit connections and proper assembly (breathing circuit, reservoir bag, connections to the patient, and scavenging) avoids misassembly and disconnections that could jeopardize ventilation.

This comprehensive approach is why it’s the best answer: it covers oxygen delivery, circuit integrity, power reliability, patient monitoring, airway management readiness, and correct assembly. Focusing on only one aspect—battery, oxygen, or identity—leaves the machine or patient vulnerable in other crucial areas.