RT Journal Article SR Electronic T1 Prognosis of patients with bilateral fixed dilated pupils secondary to traumatic extradural or subdural haematoma who undergo surgery: a systematic review and meta-analysis JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 654 OP 659 DO 10.1136/emermed-2014-204260 VO 32 IS 8 A1 John Scotter A1 Susan Hendrickson A1 Hani J Marcus A1 Mark H Wilson YR 2015 UL http://emj.bmj.com/content/32/8/654.abstract AB Primary objective To review the prognosis of patients with bilateral fixed and dilated pupils secondary to traumatic extradural (epidural) or subdural haematoma who undergo surgery.Methods A systematic review and meta-analysis was performed using random effects models. The Cochrane Central Register of Controlled Trials and PubMed databases were searched to identify relevant publications. Eligible studies were publications that featured patients with bilateral fixed and dilated pupils who underwent surgical evacuation of traumatic extra-axial haematoma, and reported on the rate of favourable outcome (Glasgow Outcome Score 4 or 5).Results Five cohort studies met the inclusion criteria, collectively reporting the outcome of 82 patients. In patients with extradural haematoma, the mortality rate was 29.7% (95% CI 14.7% to 47.2%) with a favourable outcome seen in 54.3% (95% CI 36.3% to 71.8%). In patients with acute subdural haematoma, the mortality rate was 66.4% (95% CI 50.5% to 81.9%) with a favourable outcome seen in 6.6% (95% CI 1.8% to 14.1%).Conclusions and implications of key findings Despite the poor overall prognosis of patients with closed head injury and bilateral fixed and dilated pupils, our findings suggest that a good recovery is possible if an aggressive surgical approach is taken in selected cases, particularly those with extradural haematoma.Trial registration number CRD42013005198.