“…The introduction of new stent-retriever thrombectomy techniques has encouraged several study groups to develop a simple stroke scale design to detect LVOs to reroute this patient group directly to comprehensive stroke centers that have neuroradiological intervention capability. These scales have included NIHSS (Brott et al 1989), shortened NIHSS (Tirschwell et al 2002), the Los Angeles Motor Scale (Llanes et al 2004), the 3-Item Stroke Scale (Singer et al 2005), Cincinnati Prehospital Stroke Severity Scale (Katz et al 2015), Recogntion of Stroke in the Emergency Room (Nor et al 2005), Rapid Arterial Occlusion Evaluation Scale (RACE) (de la Ossa et al 2013), Field Assessment Stroke Triage for Emergency Destination (Lima et al 2016) and the Prehospital Acute Stroke Severity Scale (Hastrup et al 2016). The highest accuracy has been reached with NIHSS and RACE, but the suggested cut-off values would still result in a loss of opportunity for over 20% of patients.…”