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      Severe Hypothermia Management in Mountain Rescue: A Survey Study

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          Abstract

          Podsiadło, Paweł, Tomasz Darocha, Sylweriusz Kosiński, Kinga Sałapa, Mirosław Ziętkiewicz, Tomasz Sanak, Rachel Turner, and Hermann Brugger. Severe hypothermia management in mountain rescue: A survey study. High Alt Med Biol 18:411–416, 2017.

          Introduction: Severe hypothermia is a rare but demanding medical emergency. Although mortality is high, if well managed, the neurological outcome of survivors can be excellent. The aim of the study was to assess whether mountain rescue teams (MRTs) are able to meet the guidelines in the management of severe hypothermia, regarding their equipment and procedures.

          Methods: Between August and December 2016, an online questionnaire, with 24 questions to be completed using Google Forms, was sent to 123 MRTs in 27 countries.

          Results: Twenty-eight MRTs from 10 countries returned the completed questionnaire. Seventy-five percent of MRTs reportedly provide advanced life support (ALS) on-site and 89% are regularly trained in hypothermia management. Thirty-two percent of MRTs transport hypothermic patients in cardiac arrest to the nearest hospital instead of an Extracorporeal Life Support facility; 39% are equipped with mechanical chest compression devices; 36% measure core body temperature on-site and no MRT is equipped with a device to measure serum potassium concentration on-site in avalanche victims.

          Conclusions: Most MRTs are regularly trained in the treatment of severe hypothermia and provide ALS. The majority are not equipped to follow standard procedural guidelines for the treatment of severely hypothermic patients, especially with cardiac arrest. However, the low response rate—23% (28/123)—could have induced a bias.

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          Most cited references23

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          Part 12: cardiac arrest in special situations: 2010 American Heart Association Guidelines for Cardiopulmonary Resuscitation and Emergency Cardiovascular Care.

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            Prolonged extracorporeal membrane oxygenation-assisted support provides improved survival in hypothermic patients with cardiocirculatory arrest.

            Extracorporeal circulation is considered the gold standard in the treatment of hypothermic cardiocirculatory arrest; however, few centers use extracorporeal membrane oxygenation instead of standard extracorporeal circulation for this indication. The aim of this study was to evaluate whether extracorporeal membrane oxygenation-assisted resuscitation improves survival in patients with hypothermic cardiac arrest. A consecutive series of 59 patients with accidental hypothermia in cardiocirculatory arrest between 1987 and 2006 were included. Thirty-four patients (57.6%) were resuscitated by standard extracorporeal circulation, and 25 patients (42.4%) were resuscitated by extracorporeal membrane oxygenation. Accidental hypothermia was caused by avalanche in 22 patients (37.3%), drowning in 22 patients (37.3%), exposure to cold in 8 patients (13.5%), and falling into a crevasse in 7 patients (11.9%). Multivariate logistic regression analysis was used to compare extracorporeal membrane oxygenation with extracorporeal circulation resuscitation, with adjustment for relevant parameters. Restoration of spontaneous circulation was achieved in 32 patients (54.2%). A total of 12 patients (20.3%) survived hypothermia. In the extracorporeal circulation group, 64% of the nonsurviving patients who underwent restoration of spontaneous circulation died of severe pulmonary edema, but none died in the extracorporeal membrane oxygenation group. In multivariate analysis, extracorporeal membrane oxygenation-assisted resuscitation showed a 6.6-fold higher chance for survival (relative risk: 6.6, 95% confidence interval: 1.2-49.3, P = .042). Asphyxia-related hypothermia (avalanche or drowning) was the most predictive adverse factor for survival (relative risk: 0.09, 95% confidence interval: 0.01-0.60, P = .013). Potassium and pH failed to show statistical significance in the multivariate analysis. Extracorporeal rewarming with an extracorporeal membrane oxygenation system allows prolonged cardiorespiratory support after initial resuscitation. Our data indicate that prolonged extracorporeal membrane oxygenation support reduces the risk of intractable cardiorespiratory failure commonly observed after rewarming.
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              Resuscitation of avalanche victims: Evidence-based guidelines of the international commission for mountain emergency medicine (ICAR MEDCOM): intended for physicians and other advanced life support personnel.

              In North America and Europe ∼150 persons are killed by avalanches every year. The International Commission for Mountain Emergency Medicine (ICAR MEDCOM) systematically developed evidence-based guidelines and an algorithm for the management of avalanche victims using a worksheet of 27 Population Intervention Comparator Outcome questions. Classification of recommendations and level of evidence are ranked using the American Heart Association system. If lethal injuries are excluded and the body is not frozen, the rescue strategy is governed by the duration of snow burial and, if not available, by the victim's core-temperature. If burial time ≤35 min (or core-temperature ≥32 °C) rapid extrication and standard ALS is important. If burial time >35 min and core-temperature 35 min, serum potassium >12 mmol L(-1), risk to the rescuers is unacceptably high or a valid do-not-resuscitate order exists. Management should include spinal precautions and other trauma care as indicated. Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.
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                Author and article information

                Journal
                High Alt Med Biol
                High Alt. Med. Biol
                ham
                High Altitude Medicine & Biology
                Mary Ann Liebert, Inc. (140 Huguenot Street, 3rd FloorNew Rochelle, NY 10801USA )
                1527-0297
                1557-8682
                01 December 2017
                01 December 2017
                01 December 2017
                : 18
                : 4
                : 411-416
                Affiliations
                [ 1 ]Polish Society for Mountain Medicine and Rescue , Szczyrk, Poland.
                [ 2 ]Polish Medical Air Rescue , Warsaw, Poland.
                [ 3 ]Department of Anaesthesiology and Intensive Care, Medical University of Silesia , Katowice, Poland.
                [ 4 ]Department of Anesthesiology and Intensive Care, Pulmonary Hospital , Zakopane, Poland.
                [ 5 ]Tatra Mountain Rescue Service , Zakopane, Poland.
                [ 6 ]Department of Bioinformatics and Telemedicine, Jagiellonian University Medical College , Kraków, Poland.
                [ 7 ]Department of Anaesthesiology and Intensive Care, Jagiellonian University Medical College , Kraków, Poland.
                [ 8 ]Department of Disaster Medicine and Emergency Care, Jagiellonian University Medical College , Kraków, Poland.
                [ 9 ]EURAC Institute of Mountain Emergency Medicine , Bolzano, Italy.
                [ 10 ]Medical University of Innsbruck , Innsbruck, Austria.
                Author notes
                Address correspondence to: Tomasz Darocha, MD, PhD, Polish Medical Air Rescue Ksiezycowa 5, 01-934 Warsaw, Poland

                E-mail: t.darocha@ 123456lpr.com.pl
                Article
                10.1089/ham.2017.0090
                10.1089/ham.2017.0090
                5743028
                28968162
                51ecf5cb-0ddf-4001-b78b-2745007d33f0
                © Paweł Podsiadło et al., 2017; Published by Mary Ann Liebert, Inc.

                This article is available under the Creative Commons License CC-BY-NC ( http://creativecommons.org/licenses/by-nc/4.0). This license permits non-commercial use, distribution and reproduction in any medium, provided the original work is properly cited. Permission only needs to be obtained for commercial use and can be done via RightsLink.

                History
                : 16 July 2017
                : 22 August 2017
                Page count
                Figures: 2, Tables: 1, References: 25, Pages: 6
                Categories
                Scientific Articles

                emergency medicine,extracorporeal membrane oxygenation,hypothermia,mountain rescue,resuscitation,rewarming

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