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.fr/patents/US20060247651?utm_source=gb-gplus-shareBrevet US20060247651 - Oval dilator and retractor set and method
Numéro de demande: 11/478,041 Numéro de publication: US 2006/0247651 A1 Date de dépôt: 29 juin 2006 Brevet délivré: US7618431 ( Date de délivrance 17 nov. 2009)
