Consequences of Patient-Ventilator Discordance

Area of Science:

• Critical Care Medicine
• Respiratory Physiology

Background:

• Patient-ventilator asynchrony (PVA) impact on clinical outcomes remains debated.
• Initial studies linked PVA to adverse events but had limitations in scope and duration.
• Recent research identified new asynchrony types (e.g., reverse triggering) and outcome modifiers (e.g., clustering).

Purpose of the Study:

• To review the clinical outcomes associated with PVA.
• To explore the effects of ventilator over- and under-assistance on patient outcomes.
• To synthesize current understanding of PVA's role in diaphragm function and clinical results.

Main Methods:

• Literature review of studies on patient-ventilator interaction.
• Analysis of research identifying novel asynchrony patterns and their clinical relevance.
• Synthesis of evidence on diaphragm response to varying ventilator support levels.

Main Results:

• PVA can be associated with both negative and positive clinical outcomes.
• Ventilator over- and under-assistance can alter diaphragm structure and function.
• Asynchronies occurring in clusters and reverse triggering represent significant clinical considerations.

Conclusions:

• The clinical significance of PVA is complex and context-dependent.
• Understanding patient inspiratory effort relative to ventilator support is crucial.
• Further research is needed to optimize ventilator settings and minimize adverse PVA effects.