Breath alcohol analysis in the Accident and Emergency Department.

Breath alcohol analysis was undertaken in 1044 consecutive patients aged over 15 years attending the Accident and Emergency (A and E) Department of a rural district general hospital during a 50-day period. 16.5 per cent of all patients had the smell of alcohol on their breath, with 10.2 per cent of the patients recording a breath alcohol level equivalent to a blood level of 80 mg/100 ml or more. One-third of all patients attending between 9 pm and midnight, and almost two-thirds of patients attending between midnight and 3 am had positive breath tests. Positive breath tests were most likely in males, patients with head injuries, with overdoses, in victims of assault and in patients with a depressed conscious level, irrespective of cause. Clinical estimation of intoxication by alcohol may be accurate in the co-operative patient, but in the patient with a head injury or with a depressed conscious level from another cause, this is more difficult. Breath alcohol analysis is rapid, not-invasive, accurate and of clinical value in these and other high-risk patients attending hospital as emergencies.