Anesthesia machines: Prevention, diagnosis, and management of malfunctions
- Robert Loeb, MD
Robert Loeb, MD
- Professor of Anesthesiology
- University of Florida College of Medicine
Anesthetic care is provided using an anesthesia machine and integrated monitors (ie, the anesthesia workstation (figure 1)) that include systems for:
●Blending a precision mixture of respiratory and anesthetic gases (anesthesia machine and vaporizers)
●Dispensing those gases to the patient (anesthesia breathing system)
●Delivering positive pressure ventilation (anesthesia ventilator)
●Removing waste gases (scavenger system)To continue reading this article, you must log in with your personal, hospital, or group practice subscription. For more information on subscription options, click below on the option that best describes you:
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- STANDARDIZED ANESTHESIA MACHINE CHECKOUT
- Anesthesia machine checkout procedures: General principles
- American Society of Anesthesiologists Anesthesia Machine Checkout
- - Items to be completed daily
- - Items to be completed before each anesthetic
- ANESTHESIA WORKSTATION ALARMS
- MALFUNCTION OF ANESTHESIA MACHINE COMPONENTS
- Loss of electrical supply
- Compressed gas supply malfunction
- Compressed gas flowmeter malfunction
- Proportioning system or fail-safe valve malfunction
- Vaporizer malfunction
- Circle breathing system malfunction
- - Breathing system leak
- - Breathing system obstruction
- - Carbon dioxide absorbent exhaustion or toxicity
- - Valve malfunctions
- Adjustable pressure-limiting valve
- Unidirectional (inspiratory and expiratory) valves
- Positive end-expiratory pressure valve
- Ventilator malfunction
- Waste gas disposal (scavenger) system malfunction
- Mapleson breathing system malfunction
- - Modified Mapleson D (Bain) circuit
- - Mapleson E (T-piece) circuit
- MALFUNCTION OF INTEGRATED ANESTHESIA MONITORS
- Oxygen analyzer
- Capnometer and respiratory gas analyzers
- Airway pressure and flow measurements
- - Airway pressure
- - Airway flow
- BACKUP EQUIPMENT FOR OXYGENATION AND VENTILATION
- SUMMARY AND RECOMMENDATIONS