Modification of Dornier HM-4 lithotriptor for pediatric extracorporeal shockwave lithotripsy

Extracorporeal shockwave lithotripsy has enjoyed increasing acceptance and utility in pediatric urology. The Dornier HM-4 lithotriptor has had good results in adults, but the gantry design does not allow smaller children to be treated. We have employed a specially designed yet simple 'spacer' to allow smaller children to be treated safely. The device may also have application in older patients with deformities who could not be treated in the past.