Adaptive support ventilation with percutaneous dilatational tracheotomy: a clinical study

Area of Science:

• Critical Care Medicine
• Respiratory Physiology
• Mechanical Ventilation

Background:

• Percutaneous dilatational tracheotomy (PDT) is a common ICU procedure.
• Mechanical ventilation settings require careful management during PDT.
• Adaptive Support Ventilation (ASV) aims to automate ventilation adjustments.

Purpose of the Study:

• To evaluate the need for minute ventilation adjustments with ASV during PDT.
• To assess the impact of endoscopic guidance on ASV performance.
• To determine the frequency of pressure limit adjustments during PDT with ASV.

Main Methods:

• Observational study of 34 ICU patients undergoing PDT with endoscopic guidance.
• Minute ventilation was not altered during the endoscopic phase.
• ASV pressure limits were adjusted as needed; post-tracheostomy, ventilation adjusted if Paco(2) deviated by >=0.5 kPa.

Main Results:

• ASV failed to maintain minute ventilation in 74% of patients during endoscopy, necessitating pressure limit adjustments.
• In 26% of patients, minute ventilation adjustments were required post-tracheostomy to maintain target Paco(2) levels.
• The majority of patients required intervention beyond standard ASV settings during PDT.

Conclusions:

• ASV settings, particularly pressure limits, frequently require manual adjustment during PDT with endoscopic guidance.
• Standard ASV may not be sufficient to manage ventilation during the complexities of PDT.
• Further research into optimizing ASV protocols for interventional procedures is warranted.