Obesity Clinical Trial
Official title:
Efficacy of Volume Targeted Pressure Support Ventilation vs. Pressure Support Ventilation in Patients With Acute Respiratory Failure at Risk of Obstructive Apneas or Obesity Hypoventilation
This study compares a volume targeted pressure support non-invasive ventilation with an automatic PEP regulation (AVAPS-AE mode) to a pressure support non-invasive ventilation (S/T mode) in patients with acute hypercapnic respiratory failure with acidosis. This study focuses on patients at risk of obstructive apneas or obesity-hypoventilation syndrom (BMI≥30 kg/m²). Half of participants (33 patients) will receive non invasive ventilation with AVAPS-AE mode, the other half will receive non-invasive ventilation with S/T mode.
So far, in respiratory intensive care units, the usual treatment of patients with acute
hypercapnic respiratory failure with acidosis is non-invasive ventilation set with a pressure
support mode (S/T or VS/AI mode depending on the ventilator manufacturer).
AVAPS-AE mode is a volume targeted pressure support mode with an automatic PEP. With the
forced oscillations method, the ventilator is able to detect the obstruction and the
resistances of upper airways.
It allows the ventilator to change its pressure settings to keep the targeted volume and
avoid apneas and hypoventilation.
That is why in patients with a BMI > 30 kg/m², at risk of obesity hypoventilation syndrom or
obstructive apneas, this ventilation mode may be interesting.
AVAPS-AE has been evaluated in the home ventilation showing it is as efficient as S/T mode in
controlling PaCO2.
However it has never been compared to S/T mode in acute respiratory failure care.
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