Gentler breathing during bypass may shield diaphragm after heart surgery

This study looked at whether using low tidal volume (gentle) ventilation during heart-lung bypass surgery helps preserve diaphragm movement and reduce lung problems after surgery. Sixty adults having elective coronary artery bypass surgery were randomly assigned to receive either gentle ventilation or no ventilation (standard care) during bypass. Researchers measured diaphragm motion with ultrasound and tracked complications like collapsed lung, fluid buildup, and pneumonia.