The purpose of this study was to determine the appropriate positive end-expiratory pressure (PEEP) using electrical impedance tomography (EIT) in children under general anesthesia and to investigate whether there is a difference between the supine and prone positions.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
33
1. General anesthesia is done in routine manner 2. A sensor for electrical impedance tomography (EIT) is applied around the patient's chest. 3. In supine position, lung recruitment maneuver is done, followed by decremental PEEP trial. Based on EIT parameter, optimal PEEP which induces minimal overdistension and collapse of lungs is determined. 4. One hour after prone position, optimal PEEP is determined again.
Hee-Soo Kim
Seoul, South Korea
Optimal PEEP level at spine position
Optimal PEEP level (cmH2O) determination using electrical impedance tomography at supine position
Time frame: 10 minutes after intubation (supine)
Optimal PEEP level at prone position
Optimal PEEP level (cmH2O) determination using electrical impedance tomography at prone position
Time frame: 1 hour after prone positioning (prone)
Dynamic compliance measured using Electrical impedance tomography
ventilation/pressure (ml/cmH2O)
Time frame: until 1 hour after prone positioning
regional ventilation delay measured using Electrical impedance tomography
ventilation time delay during one breath (no unit)
Time frame: until 1 hour after prone positioning
pulmonary opening pressure measured using Electrical impedance tomography
alveoli opening pressure (cmH2O)
Time frame: until 1 hour after prone positioning
atelectasis/overdistension ratio measured using Electrical impedance tomography
The degree comparing atelectasis and overdistension (no unit)
Time frame: until 1 hour after prone positioning
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