• Geoffrey Comp, Paul Pugsley, David Sklar, Murtaza Akhter, Megan McElhinny, Ethan Erickson, Bryan Feinstein, Molly Enenbach, Lindsay Williams, Jacquelyn Pearlmutter, and Jeffrey R Stowell.
• Valleywise Health Medical Center, Department of Emergency Medicine, Phoenix, AZ; Creighton University School of Medicine-Phoenix, Department of Emergency Medicine, Phoenix, AZ; University of Arizona College of Medicine-Phoenix, Department of Emergency Medicine, Phoenix, AZ. Electronic address: geoffbc@gmail.com.
• Ann Emerg Med. 2024 Sep 23.

AbstractThe growing prevalence of heat stroke as a public health issue, exacerbated by climate change and increasing global temperatures, demands an immediate and strategic response to prevent weather-related morbidity and mortality. Heat stroke results from the body's inability to cope with excessive heat, leading to systemic inflammatory responses, cellular apoptosis, and potential multiorgan dysfunction or failure. However, little information explicitly outlines how to perform cold-water immersion in the emergency department (ED), including potential patient selection, how much water or ice to use, target temperatures, when to stop, and complications or challenges with the process. This narrative explores implementing a comprehensive protocol for total-body cold-water immersion developed in an ED setting, a method proven effective in rapidly reducing core body temperatures, with the goal of reducing mortality and morbidity rates associated with heat-related illnesses. The protocol involves immediate temperature assessment, followed by cold-water immersion for patients with altered mental status and core temperatures above 40 °C. Discussion about the development of the process and results from applying the protocol during the summer of 2023, including cooling rates and patient outcomes, is also included. Additionally, the article addresses challenges and lessons learned during the protocol's implementation, emphasizing the importance of multidisciplinary collaboration, staff education, and the adaptation of ED infrastructure to support this lifesaving treatment based on its use during the last 3 years. The successful resolution of the presented cases, along with the protocol's potential for widespread adoption, illustrates the critical role of cold-water immersion in enhancing ED responses to heat stroke, offering a blueprint for future research and the development of similar protocols across health care settings. This work contributes to the evolving landscape of emergency medicine and aligns with the global effort to combat the adverse health effects of climate change.Copyright © 2024 American College of Emergency Physicians. Published by Elsevier Inc. All rights reserved.

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