Stroke severity quantification by critical care physicians in a mobile stroke unit.
European Journal of Emergency Medicine · 2017-12-15 · Method & validation
Abstract
BACKGROUND: Cerebral revascularization in acute stroke requires robust diagnostic tools close to symptom onset. The quantitative National Institute of Health Stroke Scale (NIHSS) is widely used in-hospital, whereas shorter and less specific stroke scales are used in the prehospital field. This study explored the accuracy and potential clinical benefit of using NIHSS prehospitally. PATIENTS AND METHODS: Thirteen anesthesiologists trained in prehospital critical care enrolled patients with suspected acute stroke in a mobile stroke unit. NIHSS was completed twice in the acute phase: first prehospitally and then by an on-call resident neurologist at the receiving hospital. The agreement between prehospital and in-hospital NIHSS scores was assessed by a Bland-Altman plot, and inter-rater agreement for predefined clinical categories was tested using Cohen's κ. RESULTS: This Norwegian Acute Stroke Prehospital Project study included 40 patients for analyses. The mean numerical difference between prehospital and in-hospital NIHSS scores was 0.85, with corresponding limits of agreement from - 5.94 to 7.64. Inter-rater agreement (κ) for the corresponding clinical categories was 0.38. A prehospital diagnostic workup (NIHSS and computed tomographic examination) was completed in median (quartiles) 10 min (range: 7-14 min). Time between the prehospital and in-hospital NIHSS scores was median (quartiles) 40 min (32-48 min). CONCLUSION: Critical care physicians in a mobile stroke unit may use the NIHSS as a clinical tool in the assessment of patients experiencing acute stroke. The disagreement in NIHSS scores was mainly for very low values and would not have changed the handling of the patients.
Abstract © the authors or publisher, via PubMed. Reuse and removal
Tags
Mobile stroke unit · Prehospital physicians · Time intervals · Triage instruments
Related articles
- Treatment first, transport second: rethinking stroke management with mobile stroke units-A systematic review and meta-analysis of controlled trials. (Front Neurol, 2026)
- A Randomized Trial of Telemedicine Models of Care on a Mobile Stroke Unit. (NEJM Evid, 2026)
- Stroke triage using the FAST-ED score shortens process times in large vessel occlusion strokes in a physician staffed pre-hospital emergency medical (PHEM) system. (Eur Stroke J, 2025)
- Ultraearly thrombolysis by an anesthesiologist in a mobile stroke unit: A prospective, controlled intervention study. (Eur J Neurol, 2021)
- Implementation of a Prehospital Stroke Triage System Using Symptom Severity and Teleconsultation in the Stockholm Stroke Triage Study. (JAMA Neurol, 2020)
- Evaluation of a score for the prehospital distinction between cerebrovascular disease and stroke mimic patients. (Int J Stroke, 2019)