Access to a greater area of surgical site with minimally invasive procedure is obtained by using two sets of sequentially placed tissue dilators oriented with their axes in a plane parallel to the spinal axis and a final non-circular dilator encompassing the two sets, followed by a non-circular tubular...http://www.google.es/patents/US20060247651?utm_source=gb-gplus-sharePatente US20060247651 - Oval dilator and retractor set and method
Número de solicitud: 11/478,041 Número de publicación: US 2006/0247651 A1 Fecha de presentación: 29 Jun 2006 Patente emitida: US7618431 ( Fecha de emisión 17 Nov 2009)
