Gentler breathing during bypass may protect the diaphragm

This study looked at whether using low tidal volume (gentle) ventilation during heart-lung bypass surgery helps preserve diaphragm movement in 60 adults having coronary artery bypass grafting. Participants were randomly assigned to receive either gentle ventilation or no ventilation (standard care) during bypass. Researchers measured diaphragm motion with ultrasound and tracked lung complications, time on a breathing tube, and ICU stay. The goal is to see if this simple change can improve recovery after heart surgery.