Background: Feasibility of performing MRI first for suspected hyperacute stroke patients in real-world practice has not been fully examined. Moreover, most past studies of reducing door-to-needle time (DNT) in intravenous thrombolysis were conducted using CT. The aim of this study was to evaluate the feasibility of an MRI-first policy and examine the effects of a quality improvement (QI) process for reducing DNT using MRI.
Methods: From January 2014 to August 2015, consecutive acute stroke patients who were treated with thrombolysis were prospectively enrolled into the present study. In principle, multimodal 1.5T-MRI was performed first for patients with suspected acute stroke. A step-by-step QI process for decreasing DNT, including prenotification by the emergency medical service, limiting the MRI sequence, and introduction of a rapid examination tool, was also implemented during this period. Time metrics for thrombolysis were compared between specific time periods.
Results: A total of 73 patients (27 women; median age 74years) were included in the present study. More than 80% of the patients were screened with MRI. More patients were managed with the MRI-first policy in the late phase (p=0.018). DNT (83min in the early phase, 68min in the middle phase, and 54min in the late phase, p<0.001) was significantly reduced across phases. The percentage of patients with DNT<60min increased significantly across time periods (p<0.001).
Conclusion: An MRI-first policy was feasible, and DNT was substantially reduced with a QI process. This process may be applicable to other hospitals.
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