Aim

To investigate whether live video streaming from the bystander’s smartphone to a medical dispatcher can improve the quality of bystander cardiopulmonary resuscitation (CPR) in out-of-hospital cardiac arrest (OHCA).

Methods

After CPR was initiated, live video was added to the communication by the medical dispatcher using smartphone technology. From the video recordings, we subjectively evaluated changes in CPR quality after the medical dispatcher had used live video to dispatcher-assisted CPR (DA-CPR). CPR quality was registered for each bystander and compared with CPR quality after video-instructed DA-CPR. Data were analysed using logistic regression adjusted for bystander’s relation to the patient and whether the arrest was witnessed.

Results

CPR was provided with live video streaming in 52 OHCA calls, with 90 bystanders who performed chest compressions. Hand position was incorrect for 38 bystanders (42.2%) and improved for 23 bystanders (60.5%) after video-instructed DA-CPR. The compression rate was incorrect for 36 bystanders (40.0%) and improved for 27 bystanders (75.0%). Compression depth was incorrect for 57 bystanders (63.3%) and improved for 33 bystanders (57.9%). The adjusted odds ratios for improved CPR after video-instructed DA-CPR were; hand position 5.8 (95% CI: 2.8–12.1), compression rate 7.7 (95% CI: 3.4–17.3), and compression depth 7.1 (95% CI: 3.9–12.9). Hands-off time was reduced for 34 (37.8%) bystanders.

Conclusions

Live video streaming from the scene of a cardiac arrest to medical dispatchers is feasible. It allowed an opportunity for dispatchers to coach those providing CPR which was associated with a subjectively evaluated improvement in CPR performance.

中文翻译：

---

来自旁观者智能手机的实时视频以改善心肺复苏

目的

调查从旁观者的智能手机到医疗调度员的实时视频流是否可以提高院外心脏骤停 (OHCA) 中旁观者心肺复苏 (CPR) 的质量。

方法

启动 CPR 后，医疗调度员使用智能手机技术将实时视频添加到通信中。从视频记录中，我们主观评估了 医疗调度员使用实时视频进行调度员辅助 CPR (DA-CPR)后 CPR 质量的变化。为每个旁观者登记心肺复苏质量，并与视频指导的 DA-CPR 后的心肺复苏质量进行比较。使用逻辑回归分析数据，并根据旁观者与患者的关系以及是否目击逮捕进行了调整。

结果

在 52 个 OHCA 呼叫中为 CPR 提供了实时视频流，90 名旁观者进行了胸外按压。在视频指导的 DA-CPR 后，38 名旁观者 (42.2%) 的手部位置不正确，23 名旁观者 (60.5%) 的手部位置有所改善。36 位旁观者 (40.0%) 的压缩率不正确，27 位旁观者 (75.0%) 的压缩率有所提高。57 名旁观者 (63.3%) 的按压深度不正确，33 名旁观者 (57.9%) 的按压深度有所改善。视频指导的 DA-CPR 后改善 CPR 的调整优势比是；手位置 5.8（95% CI：2.8-12.1），按压率 7.7（95% CI：3.4-17.3），按压深度 7.1（95% CI：3.9-12.9）。34 名 (37.8%) 旁观者的交接时间减少了。

结论

从心脏骤停现场到医疗调度员的实时视频流是可行的。它允许调度员有机会指导那些提供 CPR 的人员，这与主观评估的 CPR 性能改进相关。