Leathley Michael J, Jones Stephanie P, Gibson Josephine M E, Ford Gary A, McAdam Joanna J, Quinn Tom, Watkins Caroline L
Clinical Practice Research Unit, University of Central Lancashire, Preston, UK.
Stroke Research Group, Institute for Ageing and Health, Newcastle, UK.
Emerg Med J. 2014 Oct;31(e1):e25-8. doi: 10.1136/emermed-2013-202752. Epub 2013 Jul 13.
Identifying 'true stroke' from an emergency medical services (EMS) call is challenging, with over 50% of strokes being misclassified. In a previous study, we examined the relationship between callers' descriptions of stroke symptoms to the emergency medical dispatcher and the subsequent classification and prioritisation of EMS response. The aim of this subsequent study was to explore further the use of keywords by callers when making emergency calls, comparing stroke and non-stroke calls.
All non-stroke calls to one EMS dispatch centre between 8 March 2010 and 14 March 2010 were analysed. These were compared with the stroke calls made to one EMS dispatch centre between 1 October 2006 and 30 September 2007. Content analysis was used to explore the problems described by the caller, and findings were compared between non-stroke and stroke calls.
277 non-stroke calls were identified. Only eight (3%) callers mentioned stroke, 12 (4%) and 11 (4%) mentioned limb weakness and speech problems, respectively, while no caller mentioned more than one classic stroke symptom. This contrasted with 473 stroke calls, where 188 (40%) callers mentioned stroke, 70 (15%) limb weakness and 72 (15%) speech problems, and 14 (3%) mentioned more than one classic stroke symptom.
People who contact the EMS about non-stroke conditions rarely say stroke, limb weakness, speech problems or facial weakness. These words are more frequently used when people contact the EMS about stroke, although many calls relating to stroke patients do not mention any of these keywords.
从紧急医疗服务（EMS）呼叫中识别“真正的中风”具有挑战性，超过50%的中风被错误分类。在之前的一项研究中，我们研究了呼叫者向紧急医疗调度员描述中风症状与随后EMS响应的分类和优先级之间的关系。这项后续研究的目的是进一步探讨呼叫者在拨打紧急电话时使用关键词的情况，比较中风呼叫和非中风呼叫。
分析了2010年3月8日至2010年3月14日期间拨打一个EMS调度中心的所有非中风呼叫。将这些呼叫与2006年10月1日至2007年9月30日期间拨打一个EMS调度中心的中风呼叫进行比较。采用内容分析法探讨呼叫者描述的问题，并比较非中风呼叫和中风呼叫的结果。
共识别出277个非中风呼叫。只有8名（3%）呼叫者提到中风，分别有12名（4%）和11名（4%）提到肢体无力和言语问题，而没有呼叫者提到不止一种典型的中风症状。这与473个中风呼叫形成对比，其中188名（40%）呼叫者提到中风，70名（15%）提到肢体无力，72名（15%）提到言语问题，14名（3%）提到不止一种典型的中风症状。
就非中风情况联系EMS的人很少提到中风、肢体无力、言语问题或面部无力。当人们就中风联系EMS时，这些词的使用频率更高，尽管许多与中风患者相关的呼叫没有提到这些关键词中的任何一个。
