Retrospective analysis of hinge technique for head trauma or stroke.

Hinge technique is a new method for cerebral decompression that allows the bone flap to move outward in response to brain swelling and essentially allows reconstruction of the cranial vault as a minor procedure under local anesthesia. This retrospective study assessed outcomes following the use of this new decompressive technique. During an approximately 7-year period (June 2004 to March 2011), 58 patients who had suffered head trauma or stroke underwent cerebral decompression using the hinge technique or conventional decompressive craniectomy. Patients were assessed with the Glasgow Coma Scale (GCS), the Glasgow Outcome Scale (GOS), and the modified Rankin scale (mRS). Twenty-one patients (16 males, 5 females; age range, 21-78 yrs; mean age, 57.4 ± 15.5 yrs) underwent cerebral decompression using the hinge technique, and 37 patients (18 males, 19 females; age range, 5-83 yrs; mean age, 54.1 ± 20.9 yrs) underwent conventional decompressive craniectomy. There was no significant difference in preoperative GCS or postoperative GOS or mRS between the two groups. Six patients in the decompressive craniectomy group and none of the patients in the hinge technique group developed bone flap infection (p = 0.02). The bone flap was removed in two cases in the hinge technique group due to low cerebral perfusion pressure as well as elevated intracranial pressure (ICP). The hinge technique with ICP monitoring was effective and safe for management for head trauma or stroke and was not associated with bone flap infection.