NCT07041567

İn This Study, Patients Undergoing Bariatric Surgery Will be Divided Into Two Groups. The Control Group Will Receive Normal-flow, While the Study Group Will Receive Low-flow Inhalational Anesthesia. The Aim is to Compare the Incidence of Postop Atelectasis-between the Two Groups Using USG Evaluation

THE EFFECT OF LOW-FLOW-ANESTHESİA ON POSTOPERATİVE ATELECTASİS İN PATİENTS UNDERGOİNG BARİATRİC SURGERY: AN EVALUATİON USİNG ULTRASOUND

• Status: Not Yet Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 60 (estimated)
• Sponsor: Istanbul University · Academic / Other
• Sex: All
• Age: 18 Years – 65 Years
• Healthy volunteers: Not accepted

Summary

This study is a clinical trial and its purpose is to evaluate the effect of low and normal flow anesthesia on atelectasis formation in patients undergoing bariatric surgery by ultrasonography. In this study, lung ultrasounds and respiratory function tests will be performed on volunteers before and after surgery. These procedures are completely painless and safe. No invasive procedure will be performed in the study; the methods used do not pose any additional risk other than existing treatment procedures.

Conditions

• Atelectasis
• Pulmonary Complications
• Ultrasonography

Interventions

Type	Name	Description
OTHER	Inhalational anesthesia	In Group D, patients undergoing bariatric surgery will receive low-flow inhalational anesthesia (0.5-1 L/min) with sevoflurane. The aim is to evaluate whether the reduced fresh gas flow rate decreases the incidence of postoperative atelectasis, assessed via pulmonary ultrasonography. In Group N, patients undergoing bariatric surgery will receive standard-flow inhalational anesthesia (2-4 L/min) with sevoflurane. This group serves as the comparator to evaluate the impact of flow rate on postoperative atelectasis incidence.

Timeline

• Start date: 2025-06-20
• Primary completion: 2026-01-31
• Completion: 2026-01-31
• First posted: 2025-06-27
• Last updated: 2025-06-27