Comparison of the incidence of atelectasis according to ventilator application methods during general anesthesia for bariatric surgery

Optimal timing of “Recruitment” maneuver on arterial oxygenation in obese patients undergoing bariatric surgery

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

CRIS

Registry ID

KCT0010262

Enrollment

Registered

2025-03-06

Start date

2025-03-10

Completion date

Unknown

Last updated

2025-12-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None listed

Interventions

Others : Ventilator settings are adjusted to achieve a tidal volume of 6 mL/kg based on ideal body weight (IBW), calculated as 50 kg (45.5 kg for females) + 0.91 × (height - 152.4 cm). Positive end-ex

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients aged 19–65 years, classified as American Society of Anesthesiologists (ASA) physical status II–III, with a body mass index (BMI) of 30 or higher who consent to participate in the study.

Exclusion criteria

Exclusion criteria: Patients scheduled for emergency surgery, those with contraindications to recruitment maneuver (e.g., emphysema, hemodynamic instability), patients with respiratory or cardiac diseases, those using medications that affect respiratory function (such as salbutamol, budesonide, or formoterol), patients classified as ASA IV or higher, those who continued smoking up to one week before surgery, patients with a history of thoracic surgery, and those planned for postoperative transfer to the intensive care unit

Design outcomes

Primary

Measure	Time frame
Difference in atelectasis occurrence observed on postoperative CXR	—

Secondary

Measure	Time frame
Difference in PaO2/FiO2 in the recovery room based on the timing of the recruitment maneuver.;Difference in PaO2/FiO2 during surgery based on time points;Difference in arterial blood gas (pH, pO2, pCO2, HCO3, lactate) during surgery based on time points;Difference in respiratory mechanics (compliance, peak inspiratory pressure (PIP), plateau pressure (Pplateau), airway resistance (Raw)) during surgery based on time points;Difference in hemodynamic parameters (SBP, DBP, MAP, HR) during surgery based on time points;Difference in the incidence of postoperative respiratory complications (e.g., pneumonia)	—

Measure

Time frame

Difference in PaO2/FiO2 in the recovery room based on the timing of the recruitment maneuver.;Difference in PaO2/FiO2 during surgery based on time points;Difference in arterial blood gas (pH, pO2, pCO2, HCO3, lactate) during surgery based on time points;Difference in respiratory mechanics (compliance, peak inspiratory pressure (PIP), plateau pressure (Pplateau), airway resistance (Raw)) during surgery based on time points;Difference in hemodynamic parameters (SBP, DBP, MAP, HR) during surgery based on time points;Difference in the incidence of postoperative respiratory complications (e.g., pneumonia)

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Countries

Korea, Republic of

Contacts

Public ContactHyunyoung Seong

Korea University Anam Hospital

hello406@naver.com+82-2-920-5632

Outcome results