Characteristics of patients who had a stroke not initially identified during emergency prehospital assessment: A systematic review

Stephanie P. Jones*, Janet E. Bray, Josephine M.E. Gibson, Graham McClelland, Colette Miller, Chris I. Price, Caroline L. Watkins

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

18 Citations (Scopus)
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Background Around 25% of patients who had a stroke do not present with typical € face, arm, speech' symptoms at onset, and are challenging for emergency medical services (EMS) to identify. The aim of this systematic review was to identify the characteristics of acute stroke presentations associated with inaccurate EMS identification (false negatives). 

Method We performed a systematic search of MEDLINE, EMBASE, CINAHL and PubMed from 1995 to August 2020 using key terms: stroke, EMS, paramedics, identification and assessment. Studies included: patients who had a stroke or patient records; ≥18 years; any stroke type; prehospital assessment undertaken by health professionals including paramedics or technicians; data reported on prehospital diagnostic accuracy and/or presenting symptoms. Data were extracted and study quality assessed by two researchers using the Quality Assessment of Diagnostic Accuracy Studies V.2 tool. 

Results Of 845 studies initially identified, 21 observational studies met the inclusion criteria. Of the 6934 stroke and Transient Ischaemic Attack patients included, there were 1774 (26%) false negative patients (range from 4 (2%) to 247 (52%)). Commonly documented symptoms in false negative cases were speech problems (n=107; 13%-28%), nausea/vomiting (n=94; 8%-38%), dizziness (n=86; 23%-27%), changes in mental status (n=51; 8%-25%) and visual disturbance/impairment (n=43; 13%-28%). 

Conclusion Speech problems and posterior circulation symptoms were the most commonly documented symptoms among stroke presentations that were not correctly identified by EMS (false negatives). However, the addition of further symptoms to stroke screening tools requires valuation of subsequent sensitivity and specificity, training needs and possible overuse of high priority resources.

Original languageEnglish
Pages (from-to)387-393
Number of pages7
JournalEmergency Medicine Journal
Issue number5
Early online date19 Feb 2021
Publication statusPublished - 1 May 2021
Externally publishedYes

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