About this trial
To investigate global and regional changes in lung ventilation and perfusion induced by prone position in ARDS patients assessed by 3D-EIT. And to investigate the difference between 2D-EIT and 3D-EIT in prone position monitoring.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
patients on mechanical ventilation.
Diagnosis of ARDS was based on the Berlin definition
Patients in need of prone position because of clinical condition
Disqualifiers
Under 18 years of age.
Pregnant women;
Ribcage malformation
Any contraindication to the use of EIT (e.g. automatic implantable cardioverter defibrillator, and implantable pumps).
Trial population
Patients with ARDS on mechanical ventilation
Trial design
Case-control
Prospective
Treatments tested in this trial
Prone position
BehavioralPatients were ventilated based on the ARDS-Net recommendations . Patients were kept in a supine position. The process of lung ventilation and perfusion assessment was as follows: 1. PEEP was determined by the attending doctor and was kept the same during the supine and prone period. 2. 3D-EIT was used to monitor the ventilation and perfusion of ARDS patients at three timepoints: T1: supine position, T2: prone position at 30min, T3: prone position over 10 hours.
Treatment groups
Trial outcomes
Primary outcomes
Regional ventilation monitored by EIT
Using EIT to monitor the regional ventilation during supine and prone position, to monitor the ventilation distribution change.
Regional perfusion monitored by EIT
Using EIT to monitor the regional perfusion during supine and prone position, to monitor the ventilation distribution change.
V/Q monitored by EIT
Ventilation and perfusion monitored by EIT in supine and prone position. To evaluate the V/Q match, deadspace and shunt lung region.
Secondary outcomes
Respiratory system compliance
Monitor the respiratory system compliance during supine and prone position
SpO2
Monitor the SpO2 during supine and prone position
Sponsors and contacts
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