Perforation of the bowel during SWL in prone position.

Perforation of the small bowel during SWL is reported for the first time. The patient was treated in the prone position for a ureteral stone with 4500 shockwaves. There were no underlying or predisposing factors for the damage to the gut with the exception of the large number of shockwaves at a high energy setting. It is concluded that SWL in the prone position with shockwaves traversing the peritoneal cavity carries a risk of damage to the bowel. A reduction of the number of shockwaves and the energy level should be considered in this setting.