Surgical Positions and Postoperative Atelectasis: A Lung Ultrasound Study

Starting soon

Conditions studied: Lung Ultrasound, Atelectasis

In brief

The aim of this study is to prospectively evaluate the effect of surgical position on the development of postoperative atelectasis in patients undergoing surgery in supine, prone, lateral decubitus, and lithotomy positions using lung ultrasonography (LUS), and to investigate whether there is a difference between these positions.

Key facts

Study ID: NCT07654153
Run by: Cumhuriyet University
People needed: 100
Starts: 2026-07-20
Expected to finish: 2027-08-01
Last updated by the study team: 2026-07-21

Who can join

Age: 18 and older, up to 80. Sex: any. Healthy volunteers: accepted.

You may qualify if…

Being between 18-80 years of age
Having ASA I-III status
Planning elective surgery under general anesthesia
Agreeing to participate in the study and signing the consent form

You may not qualify if…

Patients requiring emergency surgery
Patients with ASA IV or higher
Presence of a known serious preoperative lung disease (COPD, Asthma, Pneumonia, Pleural effusion, Pneumothorax, Interstitial lung disease, Bronchiectasis, etc.)
History of neuromuscular disease
Body Mass Index (BMI) > 35 kg/m² (Morbid obesity)
Presence of chest wall deformity or skin lesions that would obstruct LUS imaging
Cases with an operative duration of less than 60 minutes or more than 300 minutes
Patients with a history of thoracotomy, sternotomy, or prior open thoracic surgery
Patients with alcohol or drug dependence
Patients with significant anemia
Patients who are pregnant or lactating
Patients who develop laryngospasm following extubation
Refusal to provide consent or inability to cooperate

Where it is running

Sivas Cumhuriyet University — Sivas, Sivas, Turkey (Türkiye)

Full record on ClinicalTrials.gov

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