Diagnosis of alcohol ingestion in mild head injuries.

42 per cent of a consecutive series of patients with mild head injuries with concussion were found to have positive blood-alcohol tests. There were errors in the clinical diagnosis of alcohol ingestion among patients with both positive and negative blood-alcohols. Medicolegal questions have so dominated the problems of diagnosing alcohol ingestion as to prevent doctors considering its clinical importance. The value of a laboratory test giving an immediate reading is emphasised.