'Refusing treatment--please see': an analysis of capacity assessments carried out by a liaison psychiatry service.

The assessment of capacity to consent to a healthcare decision is an important part of day-to-day work in general hospitals. The role of liaison psychiatric services in assessment of capacity has not been well studied in British practice. We looked at all such referrals (35) to a liaison psychiatric service in a teaching hospital in the course of one year. The commonest referrals were regarding capacity to consent to a therapeutic procedure, followed by post-discharge placement and ability to self-discharge. Organic mental disorders were the most frequent cause of incapacity. 20 (57%) of the referrals were for patients who had refused the intervention in question, and in 12 of these the contentious issue was resolved. Liaison psychiatric services can be useful not only in offering a second opinion or clarifying the influence of psychopathology on decision-making ability but also mediating between the patient and the clinical team.