The goal of this interventional study is to learn about the effects of different positions on the occurrence, regional distribution and reversibility of atelectasis by using a PulmoVista 500 monitor (Dräger. 23542 Lübeck), during general anesthesia with mechanical ventilation. The main questions it aims to answer are: * The increase in atelectasis after induction of general anesthesia in supine and Trendelenburg position compared with baseline (spontaneous breathing) * The eventual possibility of reversal of atelectasis caused by general anesthesia and Trendelenburg position by reverse Trendelenburg position and recruitment manœuvre. Participants will be adult, autonomous and able to express their will, undergoing elective gynecological or urological surgery in the extended Trendelenburg position.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
DIAGNOSTIC
Masking
TRIPLE
Enrollment
40
performance of a recruitment maneuver of 30 cm H20 for 30 seconds and measurement of electrical impedance
Place the patient in the reverse trendelenburg position and measuring the electrical impedance after 5 minutes
HUB Hôpital Erasme
Brussels, Anderlecht, Belgium
RECRUITINGthe percentage of atelectasis after induction of general anesthesia (Time 1)
percentage
Time frame: from the base measure to time 1 (10 minutes)
the percentage of atelectasis after being positioned in the trendelenburg position (Time 2)
percentage
Time frame: from the base measure to time 2 (15 minutes)
The eventual possibility of reversal of atelectasis by reverse Trendelenburg position and recruitment maneuver (Time 3)
percentage
Time frame: from the base measure to time 3 (20 minutes)
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