CBL Mode in Clinical Teaching of Bedside Lung Ultrasound in Intensive Care Unit: A Randomized Controlled Study

This single-center randomized controlled educational trial will be conducted in the Intensive Care Unit (ICU) of the First Affiliated Hospital of Wannan Medical College, China. The study aims to compare the effectiveness of Case-Based Learning (CBL) and traditional lecture-based teaching in bedside lung ultrasound (BLUE) education for residents and medical students participating in critical care rotations.

Participants will be randomized in a 1:1 ratio by computer-generated sequence into either the CBL group or the traditional teaching group. Both groups will receive a total of 8 hours of instruction delivered in two 4-hour sessions during their ICU rotation period.

In the CBL group, teaching will be guided by authentic clinical cases that include varied respiratory pathologies (e.g., pneumonia, pneumothorax, pulmonary edema). Each case will involve small-group discussion of diagnostic reasoning, interpretation of ultrasound findings, and supervised scanning practice at the bedside. Instructors will facilitate feedback and reflective learning, integrating theoretical concepts with clinical application.

In the traditional teaching group, participants will attend classroom lectures on ultrasound principles and watch instructor-led demonstrations of standardized BLUE examination techniques. Short hands-on practice sessions will follow under supervision but without case-based discussion or peer-feedback components.

All teaching sessions will be delivered by faculty certified in critical ultrasonography, using standardized instruction materials and the same ultrasound equipment and scanning protocols across groups. Data collection will occur within one week after completion of the teaching intervention. Primary outcomes include Objective Structured Clinical Examination (OSCE) score reflecting image acquisition, interpretation, and clinical reasoning. Secondary outcomes comprise written knowledge test scores and learner-reported measures of learning motivation and satisfaction.