Mechanical ventilation | |
- False alarm – threshold set too high
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- Pressure sensor tube disconnect or obstruction
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- False alarm – high threshold (eg, neonate)
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- Malfunctioning flow sensor (eg, due to moisture or broken filament)
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- Capnometer sample line crack or disconnect
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- Breathing system obstruction
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- Large cuff leak (no exhaled gas into breathing system)
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- Apnea-pressure and apnea-flow and apnea-CO2
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- Breathing system disconnect
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- Ventilator turned off or cycling failure malfunction
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- Lower airway suction (gastric tube in trachea, tracheal/bronchial suction)
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Spontaneous or manual ventilation | |
- False alarm – When switching from mechanical to spontaneous ventilation (apnea-pressure not applicable in spontaneous mode)
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- False alarm – high threshold (neonate)
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- Incomplete endotracheal tube kink or obstruction
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- Breathing system disconnect with patient still connected to CO2 sampling site
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- Malfunctioning flow sensor (eg, due to moisture or broken filament)
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- Capnometer sample line crack or disconnect
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- Breathing system obstruction
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- Airway (ETT or LMA) obstruction
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- Breathing system disconnect
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- Lower airway suction (gastric tube in trachea, tracheal/bronchial suction)
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