Abstract WP48: How To Optimize Population Access To Acute Stroke Expertise

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Objective: Many U.S. emergency departments (EDs) lack access to stroke neurologists to support decision-making for thrombolytics and identification of thrombectomy-eligible patients. We outline a strategy to identify hospitals where telestroke might improve access and estimate potential gains in both the number of patients receiving reperfusion treatment and lives saved. Methods: We identified all EDs that provided ischemic stroke care for a Medicare beneficiary during 2018. We then excluded those with clear stroke expertise or with another ED with stroke expertise within 20 miles. At these EDs, we used annual ischemic stroke volumes and previously-derived risk ratios to quantify estimated marginal benefits (additional patients receiving reperfusion and additional lives saved) with the introduction of telestroke. Results: Among 4657 US EDs that provided stroke care in 2018, 1057 had limited stroke capabilities in their ED or within 20 miles. Of these 1057 EDs, 83.1% were in rural communities, and they cared for a median of 6 ischemic stroke patients per year. We estimate telestroke introduction to all 1057 would lead to 164 (95% CI 93-247) additional patients receiving reperfusion treatment and 90 (95% CI 2-180) additional lives saved annually (Figure). If only 263 EDs in the the top quartile of marginal benefit were targeted, this would capture over half of the estimated benefits. Conclusions: We estimate that approximately a quarter of U.S. EDs, primarily small rural EDs, would benefit most from new telestroke capacity. Our strategy may be used to improve stroke systems of care and maximize specialist access for the U.S. population.