Estimated caseload for a rotary wing prehospital extra-corporeal cardio-pulmonary resuscitation service in North West England: A retrospective eligibility study

IF 2.4 Q3 CRITICAL CARE MEDICINE Resuscitation plus Pub Date : 2025-03-26 DOI:10.1016/j.resplu.2025.100948

John Weeks , Steve Bell , Thomas Nelson , Ian Tyrrell-Marsh

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Abstract

Background

Prehospital Extra-Corporeal Membrane Oxygenation Cardiopulmonary Resuscitation (ECPR) has the potential to improve survival from out of hospital cardiac arrest (OHCA). This study aims to estimate the potential caseload for an airborne ECPR service for refractory cardiac arrest in adults in North West England.

Methods

A retrospective analysis was carried out on cardiac arrest patients attended by The North West Air Ambulance Charity (NWAA) team, examining the time taken from the 999 call to emergency services, to team arrival at patient, this was used to create a mathematical model for travel times.

Secondly, a retrospective review of cardiac arrest cases attended by The North West Ambulance Service (NWAS) was performed. Two sets of criteria were applied to examine if prehospital cardiac arrest patients would be eligible for ECPR; a locally defined set (LIC), and an in-hospital criteria (AIC). Combined with our travel time model, we estimated the number of patients the service might see.

Results

Time taken for the NWAA team to reach cardiac arrest patients was given by the formula y = 0.2237x + 20.135 and there was a moderate linear distance and time correlation. 85 and 78 patients per annum would have been eligible, using the LIC and AIC, respectively. Using an estimated 30% survival rate 21.6–23.1 lives could be saved annually.

Conclusion

The two different criteria produced similar estimates of caseload. An ECPR service in this region would expect to treat to 1.4–1.5 patients per week, depending on the criteria used.

Trial registration

Not applicable.

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英格兰西北部旋翼式院前体外心肺复苏服务的估计工作量：回顾性资格研究

背景院前体外膜肺氧合心肺复苏（ECPR）有可能提高院外心脏骤停（OHCA）患者的存活率。本研究旨在估算在英格兰西北部为难治性心脏骤停的成人提供空中心肺复苏服务的潜在病例数。方法首先，对西北空中救护慈善机构（NWAA）团队救治的心脏骤停患者进行回顾性分析，研究从999电话呼叫急救服务到团队到达患者身边所需的时间，并以此建立一个行程时间数学模型。我们采用了两套标准来审查院前心脏骤停患者是否符合 ECPR 条件：一套是当地定义的标准（LIC），另一套是院内标准（AIC）。结合我们的交通时间模型，我们估算出了该服务可能接诊的患者人数。结果西北地区急救中心团队到达心脏骤停患者所需的时间为 y = 0.2237x + 20.135，距离与时间呈中度线性相关。根据 LIC 和 AIC，每年分别有 85 和 78 名患者符合条件。结论两种不同的标准得出的病例量估计值相似。该地区的 ECPR 服务预计每周可治疗 1.4-1.5 名患者，具体取决于所使用的标准。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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