Patients who experience Transient Ischaemic Attack (TIA) should be assessed and treated in a specialist clinic to reduce risk of further TIA or stroke. But referrals are often delayed. We aimed to identify published studies describing pathways for emergency assessment and referral of patients with suspected TIA at first medical contact: primary care; ambulance services; and emergency department.
We conducted a scoping literature review. We searched four databases (PubMed, CINAHL, Web of Science, Scopus). We screened studies for eligibility. We extracted and analysed data to describe setting, assessment and referral processes reported in primary research on referral of suspected TIA patients directly to specialist outpatient services.
We identified eight studies in nine papers from five countries: 1/9 randomized trial; 6/9 before-and-after designs; 2/9 descriptive account. Five pathways were used by family doctors and three by Emergency Department (ED) physicians. None were used by paramedics. Clinicians identified TIA patients using a checklist incorporating the ABCD2 tool to describe risk of further stroke, online decision support tool or clinical judgement. They referred to a specialist clinic, either directly or via a telephone helpline. Anti-platelet medication was often given, usually aspirin unless contraindicated. Some patients underwent neurological and blood tests before referral and discharge. Five studies reported reduced incident of stroke at 90 days, from 6–10 percent predicted rate to 1.2-2.1 percent actual rate. Between 44 percent and 83 percent of suspected TIA cases in these studies were directly referred to stroke clinics through the pathways.
Research literature has focused on assessment and referral by family doctors and ED physicians to reduce hospitalization of TIA patients. No pathways for paramedic use were reported. Since many suspected TIA patients present to ambulance services, effective pre-hospital assessment and referral pathways are needed. We will use review results to develop a paramedic referral pathway to test in a feasibility trial.
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