Whole-body cooling effectiveness of cold intravenous saline following exercise hyperthermia: a randomized trial

Heat Stroke Management Updates: A Description of the Development of a Novel in-Emergency Department Cold-Water Immersion Protocol and Guide for Implementation

The 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.

Management of Heat-Related Illness and Injury in the ICU: A Concise Definitive Review

OBJECTIVES

The increasing frequency of extreme heat events has led to a growing number of heat-related injuries and illnesses in ICUs. The objective of this review was to summarize and critically appraise evidence for the management of heat-related illnesses and injuries for critical care multiprofessionals.

DATA SOURCES

Ovid Medline, Embase, Cochrane Clinical Trials Register, Cumulative Index to Nursing and Allied Health Literature, and ClinicalTrials.gov databases were searched from inception through August 2023 for studies reporting on heat-related injury and illness in the setting of the ICU.

STUDY SELECTION

English-language systematic reviews, narrative reviews, meta-analyses, randomized clinical trials, and observational studies were prioritized for review. Bibliographies from retrieved articles were scanned for articles that may have been missed.

DATA EXTRACTION

Data regarding study methodology, patient population, management strategy, and clinical outcomes were qualitatively assessed.

DATA SYNTHESIS

Several risk factors and prognostic indicators for patients diagnosed with heat-related illness and injury have been identified and reported in the literature. Effective management of these patients has included various cooling methods and fluid replenishment. Drug therapy is not effective. Multiple organ dysfunction, neurologic injury, and disseminated intravascular coagulation are common complications of heat stroke and must be managed accordingly. Burn injury from contact with hot surfaces or pavement can occur, requiring careful evaluation and possible excision and grafting in severe cases.

CONCLUSIONS

The prevalence of heat-related illness and injury is increasing, and rapid initiation of appropriate therapies is necessary to optimize outcomes. Additional research is needed to identify effective methods and strategies to achieve rapid cooling, the role of immunomodulators and anticoagulant medications, the use of biomarkers to identify organ failure, and the role of artificial intelligence and precision medicine.