Spine surgery study: does body position change how lungs react to breathing help?

This study looked at 30 adults having major spine surgery to see how a breathing technique called alveolar recruitment maneuver (ARM) affects the lungs and heart when done in different body positions. ARMs help keep lungs open during surgery. The researchers compared doing ARM while patients lay on their stomach (prone) versus on their back (supine). They measured breathing and heart data before, during, and after the maneuver. The goal is to learn how position changes the body's response, so future surgeries can be safer.