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Using Ventilator Graphics to Identify Patient - Ventilator AsynchronyJon O Nilsestuen PhD RRT FAARC and Kenneth D Hargett RRTI ntroductionTrigger Asynchrony (Phase 1)Trigger Asynchrony Can Occur in Any Ventilation ModeFlow Asynchrony (Phase 2)Volume Ventilation With a Fixed Flow PatternPressure Ventilation With Variable FlowTermination Asynchrony (Phase 3)Delayed TerminationPremature TerminationExpiratory Asynchrony (Phase 4)SummaryPatient- Ventilator interaction can be described as the relationship between 2 respiratory pumps: (1) thepatient s pulmonary system, which is controlled by the neuromuscular system and influenced by themechanical characteristics of the lungs and thorax, and (2) the Ventilator , which is controlled by theventilator settings and the function of the flow valve. When the 2 pumps function in synchrony, everyphase of the breath is perfectly matched. Anything that upsets the harmony between the 2 pumps resultsin asynchrony and causes Patient discomfort and unnecessarily increases work of breathing.
Using Ventilator Graphics to Identify Patient-Ventilator Asynchrony Jon O Nilsestuen PhD RRT FAARC and Kenneth D Hargett RRT Introduction Trigger Asynchrony (Phase 1)
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