Results of a 1-year quality-improvement process to reduce door-to-needle time in acute ischemic stroke with MRI screening

ObjectiveTo determine the effects of a 1-year quality-improvement (QI) process to reduce door-to-needle (DTN) time in a secondary general hospital in which multimodal MRI screening is used before tissue plasminogen activator (tPA) administration in patients with acute ischemic stroke (AIS).MethodsThe QI process was initiated in January 2015. Patients who received intravenous (iv) tPA < 4.5 h after AIS onset between 26 February 2015 to 25 February 2016 (during implementation of the QI process; the “2015 cohort”) were identified (n = 130), and their demographic and clinical characteristics and timing metrics compared with those of patients treated by iv tPA in 2014 (the “2014 cohort”, n = 135).ResultsOf the 130 patients in the 2015 cohort, 120 (92.3%) of them were screened by MRI. The median DTN time was significantly reduced by 30% (from 84 min in 2014 to 59 min; P < 0.003), while the proportion of treated patients with a DTN time ≤ 60 min increased from 21% to 52% (P < 0.0001). Demographic and baseline characteristics did not significantly differ between cohorts, and the improvement in DTN time was associated with better outcomes after discharge (patients with a 0-2 score on the modified rankin scale: 59% in the 2015 cohort vs 42.4% in the 2014 cohort; P < 0.01). During the 1-year QI process, the median DTN time decreased by 15% (from 65 min in the first trimester to 55 min in the last trimester; P ≤ 0.04) with a non-significant 1.5-fold increase in the proportion of treated patients with a DTN time ≤ 60 min (from 41% to 62%; P = 0.09).ConclusionIt is feasible to deliver tPA to patients with AIS within 60 min in a general hospital, using MRI as the routine screening modality, making this QI process to reduce DTN time widely applicable to other secondary general hospitals.