RMGA Emergency Procedures 5 — Questions and Answers
Question 1: An oxygen-enriched environment is detected in a patient room due to an undetected leak. Which fire hazard precaution is MOST critical?
- Increase humidity in the room to suppress fire risk
- Remove all ignition sources including electrical equipment and prohibit smoking (Correct answer)
- Install additional sprinkler heads above the oxygen outlet
- Allow the room to ventilate naturally over several hours before investigating
Correct answer: Remove all ignition sources including electrical equipment and prohibit smoking
Oxygen-enriched atmospheres dramatically accelerate fire ignition and spread; removing all ignition sources is the most critical immediate precaution.
Question 2: During a mass casualty incident, the medical air system is insufficient to support the surge in ventilator demand. Which backup strategy is NFPA 99-compliant?
- Use compressed nitrogen as a substitute for medical air in ventilators
- Deploy NFPA 99-compliant reserve cylinders of medical air and notify all clinical staff (Correct answer)
- Reduce ventilator flow settings to stretch the available supply
- Connect portable compressors of any grade to the piped system to boost pressure
Correct answer: Deploy NFPA 99-compliant reserve cylinders of medical air and notify all clinical staff
NFPA 99 permits reserve cylinder supply as an emergency backup; only medical-grade compressed air may be used for patients, and staff must be notified of the supply change.
Question 3: A source alarm for 'Medical Vacuum Low' appears during a shift change. The on-coming RMGA finds one of two vacuum pumps is offline. What is the correct escalation path?
- Document the alarm and wait for biomedical engineering's regular morning rounds
- Immediately attempt to restore the offline pump and notify clinical leadership of the reduced redundancy (Correct answer)
- Shut down the vacuum system to prevent overloading the remaining pump
- Increase pipeline pressure to compensate for the reduced vacuum capacity
Correct answer: Immediately attempt to restore the offline pump and notify clinical leadership of the reduced redundancy
Restoring the offline pump restores full redundancy, and notifying clinical leadership ensures preparedness if vacuum levels drop further during repair.
Question 4: A medical gas area alarm activates showing 'Oxygen Low Pressure' for the NICU. The RMGA verifies the zone valve is open and the source pressure is adequate. What is the most likely cause?
- The alarm panel calibration has drifted and needs recalibration
- Excessive demand in the NICU is exceeding line capacity or a pressure regulator has failed closed (Correct answer)
- The bulk liquid oxygen storage is empty
- The NICU alarm panel is cross-connected to a different zone
Correct answer: Excessive demand in the NICU is exceeding line capacity or a pressure regulator has failed closed
When source pressure is adequate and the valve is open, low zone pressure indicates either demand exceeding line capacity or a failed-closed downstream pressure regulator.
Question 5: Following an emergency repair of a medical gas pipeline, which test must be completed per NFPA 99 before the system is returned to service?
- A 15-minute flow rate test at the nearest outlet
- Cross-connection testing, purity testing, and pressure testing per NFPA 99 Section 5.1 (Correct answer)
- A visual inspection and leak test with soapy water only
- An alarm panel functional test at the nursing station
Correct answer: Cross-connection testing, purity testing, and pressure testing per NFPA 99 Section 5.1
NFPA 99 mandates cross-connection, purity, and pressure verification tests after any pipeline repair to ensure patient safety before restoration.
Question 6: A facility is transitioning from liquid oxygen to cylinder manifold supply during a scheduled bulk tank maintenance. What must the RMGA verify before allowing clinical use?
- Only that the manifold regulator output pressure matches the piped system specification
- That the manifold is properly connected, regulators are set, purity is confirmed, and clinical areas are notified of the supply change (Correct answer)
- That all cylinder valves are fully open and the manifold alarm is silenced
- That the oxygen supplier has delivered at least 50 cylinders before switchover
Correct answer: That the manifold is properly connected, regulators are set, purity is confirmed, and clinical areas are notified of the supply change
A verified connection, proper regulator settings, confirmed gas purity, and clinical staff notification are all required before returning patients to the alternate supply.
Question 7: An RMGA responds to an alarm indicating that medical air dew point has exceeded the maximum permitted level. What is the primary patient safety risk?
- Increased fire hazard in the piped medical air system
- Moisture in the medical air lines can damage ventilators and deliver contaminated air to patients (Correct answer)
- Medical air will become flammable at high dew points
- High dew point indicates the medical air contains excess oxygen
Correct answer: Moisture in the medical air lines can damage ventilators and deliver contaminated air to patients
Excessive moisture in medical air can damage ventilators, cause bacterial growth, and deliver contaminated air to patients, making dew point control a critical patient safety parameter.
RMGA Emergency Procedures 5
An oxygen-enriched environment is detected in a patient room due to an undetected leak.
Which fire hazard precaution is MOST critical?