Avalanche transceiver search times during avalanche companion rescue – A prospective randomized single-blinded cross-over simulation study

IF 2.4 Q3 CRITICAL CARE MEDICINE

Resuscitation plus Pub Date : 2025-08-19 DOI:10.1016/j.resplu.2025.101065

Bernd Wallner , Simon Woyke , Manuel Winkler , Fabio Caramazza , Ivo B. Regli , Gabriel Putzer , Giacomo Strapazzon , Markus Falk , Hermann Brugger , Katharina Hüfner , Peter Mair

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引用次数: 0

Abstract

Background

The aim of this study was to analyse the influence of voice navigation in a new generation of transceivers on the time and success rate of transceiver search in a simulated avalanche rescue scenario.

Methods

Fifty participants performed two randomized test runs, using two different transmitters with and without voice navigation. Primary outcome was success rate, total transceiver search and total location time, secondary outcome parameters comprised predefined time intervals (coarse search time, fine search time, probing time) and deviations from the recommended standard search procedure.

Results

The study shows comparable results in success rate, total transceiver search time (111.1 s ± SD84.3 s) and total location time (134.4 s ± SD 112.6 s) for trials with and without voice navigation. Wrong initial search direction was corrected earlier in trials with voice (49.6 ± 6.9 s versus 93.7 ± 18.4 s p = 0.011). Participants were significantly faster in the second search trial (first 203.0 s versus 143.2 s; p = 0.002), a learning effect, more pronounced with voice navigation (voice 119.8 s vs. no-voice 164.8 s; p = 0.014). Deviations from the recommended standard search procedure were common (55 % of trials), without any difference between voice and no-voice navigation.

Conclusions

This study demonstrated a wide inter-individual variation in total transceiver search times and total location time in participants without experience. Voice navigation did not result in a significant reduction of transceiver search times but led to a faster correction of a wrong initial search direction and improved the learning effect significantly in second trials. Voice navigation could possibly optimize performance in participants without prior experience in stressful situations.

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雪崩同伴救援期间的雪崩收发器搜索时间-一项前瞻性随机单盲交叉模拟研究

本研究的目的是分析在模拟雪崩救援场景中，新一代收发机语音导航对收发机搜索时间和成功率的影响。方法50名参与者随机进行两次试验，分别使用两种不同的带和不带语音导航的发射器。主要指标为成功率、总收发器搜索时间和总定位时间，次要指标包括预定义的时间间隔（粗搜索时间、细搜索时间、探测时间）和与推荐的标准搜索程序的偏差。结果有语音导航和无语音导航的成功率、总收发器搜索时间（111.1 s±SD84.3 s）和总定位时间（134.4 s±SD 112.6 s）具有可同性。在语音试验中，错误的初始搜索方向被纠正得更早（49.6±6.9秒vs 93.7±18.4秒p = 0.011）。参与者在第二次搜索试验中明显更快（第一次203.0秒对143.2秒，p = 0.002），学习效果在语音导航中更为明显（语音119.8秒对无语音164.8秒，p = 0.014）。与推荐的标准搜索程序的偏差是常见的（55%的试验），语音和非语音导航之间没有任何差异。结论本研究表明，在没有经验的参与者中，总收发器搜索时间和总定位时间存在很大的个体差异。语音导航没有导致收发器搜索次数的显著减少，但导致错误的初始搜索方向的更快纠正，并且在第二次试验中显著提高了学习效果。语音导航可能会优化没有压力环境经验的参与者的表现。

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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