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Anaesth Intensive Care · Mar 2021
Patient-ventilator dyssynchrony in the intensive care unit: A practical approach to diagnosis and management.
- Brandon Oto, Janet Annesi, and Raymond J Foley.
- Adult Critical Care, UConn Health, Farmington, USA.
- Anaesth Intensive Care. 2021 Mar 1; 49 (2): 86-97.
AbstractPatient-ventilator dyssynchrony or asynchrony occurs when, for any parameter of respiration, discordance exists between the patient's spontaneous effort and the ventilator's provided support. If not recognised, it may promote oversedation, prolong the duration of mechanical ventilation, create risk for lung injury, and generally confuse the clinical picture. Seven forms of dyssynchrony are common: (a) ineffective triggering; (b) autotriggering; (c) inadequate flow; (d) too much flow; (e) premature cycling; (f) delayed cycling; and (g) peak pressure apnoea. 'Reverse triggering' also occurs and may mimic premature cycling. Correct diagnosis of these phenomena often permits management by simple ventilator optimisation rather than by less desirable measures.
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