Complex sentence: Obstructing stones that are too large to be removed or broken mechanically by ERCP may be managed by extracorporeal shock wave lithotripsy, a technique that uses acoustic shock waves administered outside the body to break down the stones.
Split into simpler sentences: Obstructing stones that are too large to be removed or broken mechanically by ERCP may be managed by extracorporeal shock wave lithotripsy. This technique uses acoustic shock waves administered outside the body to break down the stones.