Abstract WP042: Impact of Mobile Intensive Care Nurse Reported Los Angeles Motor Scale score on Door to Device time for thrombectomy in acute ischemic stroke

Background and Purpose: Mechanical thrombectomy (MT) is the treatment standard for large vessel occlusion (LVO) stroke. In 2019, the American Heart Association (AHA) launched Target: Stroke Phase III , setting a goal to achieve Door to Device (DTD) within 90 minutes for patients who arrive from the field. The Los Angeles Motor Scale (LAMS) is a validated prehospital tool shown to predict anterior LVOs with high sensitivity and specificity, facilitating early identification of LVOs. At our institution, the Emergency Department (ED) Mobile Intensive Care Nurses (MICNs) calculate LAMS based on Emergency Medical Service (EMS) report and alerts the stroke team to mobilize prior to patient arrival. This study aims to determine if prenotification with a high LAMS score is associated with shorter DTD times for MT. Methods: We performed a retrospective study of ischemic stroke patients brought in by EMS with a calculated LAMS score from January 2022- June 2025. The inclusion criteria includes (1) stroke caused by LVO confirmed on CTA, (2) arrival from the field via EMS, and (3) documented first pass for MT. Patients with documented reasons for DTD delay, outlined by Get With The Guidelines criteria, were excluded. Demographic, clinical, and imaging data was collected via chart review. Both univariate and multivariant analyses were applied to assess associations. A p-value