A working channel for spinal surgery includes a body having a distal end, a proximal end and an interior lumen traversing through the elongate body. The elongate body generally has a parallelogram-shaped cross-section. Another working channel for spinal surgery includes a flared upper section having...http://www.google.es/patents/US7651499?utm_source=gb-gplus-sharePatente US7651499 - Working channel for minimally invasive spine surgery
Working channel for minimally invasive spine surgery
