[Reduction and positioning of cervical spine injuries]

Prerequisites for successful reduction of cervical spine injuries are an exact analysis and classification of every lesion. In locked dislocations disc protrusion should be excluded prior to reduction by MRI or CT-scan. For manual reduction and closed manipulation by the trauma surgeon we use a halo-ring which is applied in local anaesthesia and fluoroscopic control. The anatomic position is maintained by a halo-fixator until surgery. Skeletal traction is used mainly for locked dislocations and late malalignements. Traction is provided by a halo-ring and weights up to 20 kg. Repeated clinical and neurological examinations are necessary to rule out overdistraction of the spine or neurologic deterioration. The weight may be reduced after reduction to 2 kg. For intraoperative positioning and reduction of cervical spine injuries we designed a special device which is connected to the halo ring and allows to fix the head and spine in any desired position. It may be used in prone or supine position of the patient. Operative reductions are rarely necessary on the cervical spine. Typical indication are fractures of posterior elements of the spine preventing closed reduction. Reduction manoeuvers depend on the kind of injury and are mainly composed of traction and a reversal of the trauma mechanism. The most severe complication is a neurologic deterioration. Reports in literature about 13 patients having sustained such a fate are showing the following: In most cases disc material dislocated in the spinal canal during reduction could be made responsible for the catastrophic course. Especially at risk are patients with open reduction from a posterior approach.