LEESBURG, Va.--(BUSINESS WIRE)--K2M, Inc., the spinal device company developing innovative and simplified solutions for the treatment of complex spinal pathologies and procedures, today announced the introduction of a revolutionary minimally invasive approach to dynamic fixation of the spine. The POTOMAC™ Rod System and the SERENGETI™ Minimally Invasive Retractor System have received CE Mark clearance for international distribution to expand the global presence of K2M technologies.