Using ESWL, the hard pancreatic stones can be crushed into a powder from outside without any external cut. It uses electromagnetic shock wave technology and pulverises the stones into a powder of less than 5mm size. Once this is done, the crushed stones can be removed using an endoscopic technique called ERCP.Using ESWL, the hard pancreatic stones can be crushed into a powder from outside without any external cut. It uses electromagnetic shock wave technology and pulverises the stones into a powder of less than 5mm size. Once this is done, the crushed stones can be removed using an endoscopic technique called ERCP.