Townend Michael Liam, Byers Sonia
Northumbria Healthcare NHS Foundation Trust.
Leica Biosystems, Newcastle University.
Br Paramed J. 2018 Jun 1;3(1):16-22. doi: 10.29045/14784726.2018.06.3.1.16.
To assess the accuracy of visual estimation of external blood loss by UK pre-hospital clinicians and to comment on its value during handover.
A sample of 104 pre-hospital clinicians were shown eight staged scenarios showing varying amounts of blood loss and asked to estimate the amount of blood loss depicted. Participants included a range of pre-hospital clinicians from both NHS ambulance trusts and Helicopter Emergency Medical Services.
A wide distribution of estimates and therefore percentage error was observed in our study. Pre-hospital clinicians are inaccurate when estimating external blood loss at scene, regardless of training and skill level.
Visual estimation of blood loss is too inaccurate to be considered clinically worthwhile. Greater research focus is needed to investigate and validate better measures of blood loss that can be utilised in the pre-hospital and emergency medicine environment. Until evidence-based methods of estimation can be implemented, this information should not be included in hospital handovers.
评估英国院前临床医生对外部失血视觉估计的准确性，并评论其在交接过程中的价值。
向104名院前临床医生展示了八个呈现不同失血量的分阶段场景，并要求他们估计所描绘的失血量。参与者包括来自国民保健服务（NHS）救护车信托机构和直升机紧急医疗服务部门的一系列院前临床医生。
在我们的研究中观察到估计值分布广泛，因此百分比误差也很大。无论培训和技能水平如何，院前临床医生在现场估计外部失血时都不准确。
失血的视觉估计过于不准确，以至于在临床上不值得考虑。需要更多的研究关注来调查和验证可用于院前和急诊医学环境的更好的失血测量方法。在能够实施基于证据的估计方法之前，此信息不应包含在医院交接中。
