Abstract P2: Results of a Prospective Observational Cohort Study of Tenecteplase as Standard of Care Stroke Thrombolytic
Background: Our 10-hospital network (2 CSCs, 2PSCs, 6 non-SCs) switched our standard stroke thrombolytic from alteplase (ALT) to tenecteplase (TNK; 0.25 mg/kg) in September 2019. Methods: We designed a two-year prospective cohort analysis of key processes and clinical outcomes for TNK-treated patients with planned quarterly assessments of feasibility and safety. The TNK cohort is compared to the retrospective historical cohort of all unique patients at these hospitals treated with ALT during the prior 2-year period (n=354). Analysis were taken from a local REDcap registry that recorded data fields required for Stroke Center certification and submission to Get-With-The Guidelines (GWTG). Interim results through three quarters ending June 30, 2020. Results: 151 patients were treated with TNK. The samples TNK v ALT were well matched on age (median, IQR) 66.0 (55.0, 76.0) v 67.0 (55.0, 78.8) and NIHSS at admission (median, IQR), 8 (4, 13) v 8 (4, 15). Symptomatic ICH (ECASS 3 definition) occurred in 2.0% of TNK and 2.3% of ALT treated patients; all but one symptomatic ICH occurred in patients treated with both thrombolytic and endovascular therapies. All cause in-hospital mortality was 3.3% and 6.8%, respectively. No differences were observed in early outcomes of discharge to home (52%, 53%) or independent ambulation (46%, 45%). Day 90 Rankin Score (last observation carried forward for missing values) was available only for TNK: mRS 0-1 in 46.4% (95%CI 38.6%-54.3%), 0-2 in 55.6% (95%CI 47.7%-63.3%). A significantly greater proportion of patients were treated with the lytic within 45 minutes of hospital arrival after the switch to TNK using Get-With-The-Guidelines DTN time criteria (Table), most notably at the primary stroke centers. Conclusions: To date, the transition to TNK was associated with reductions in DTN times and in Drip-and-Ship transfer times (see related abstract). No differences were seen on early indices of safety or efficacy.