Atelectasis after induction of general anesthesia is common even in healthy patients and is clinically problematic, especially in obese patients. We aim to investigate whether preoxygenation with high-flow nasal oxygen during anesthesia induction reduces atelectasis in obese patients.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
TRIPLE
Enrollment
92
preoxygenation using high-flow nasal oxygen, FiO2 1.0, 40 L/min, 3 min
preoxygenation using facemask, FIO2 1.0, fresh gas flow 10 L/min, 3 min
SMG - SNU Boramae Medical Center
Seoul, South Korea
RECRUITINGLung ultrasound score
modified LUSS
Time frame: Immediately after anesthesia induction
Incidence of atelectasis
Time frame: Immediately after anesthesia induction
PaO2 to FiO2 ratio and PaCO2
Time frame: Immediately after anesthesia induction
Hemodynamic variables
Blood pressure, heart rate, pulse oximetry
Time frame: During anesthesia induction
Patient Satisfaction Score
Time frame: During preoxygenation
Lung ultrasound score
Time frame: In the PACU after surgery
Incidence of Spo2 less than 95%
Time frame: during 48 hours postoperatively
Maximum body temperature
Time frame: during hospitalization up to 1 week
Incidence of postoperative pulmonary complications
Time frame: during hospitalization up to 1 week
length of hospital stay
Time frame: up to 1 year
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