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Beekman R, Kim N, Nguyen C, McGinniss G, Deng Y, Kitlen E, Garcia G, Wira C, Khosla A, Johnson J, Miller PE, Perman SM, Sheth KN, Greer DM, Gilmore EJ. Temperature Control Parameters Are Important: Earlier Preinduction Is Associated With Improved Outcomes Following Out-of-Hospital Cardiac Arrest. Ann Emerg Med 2024:S0196-0644(24)00340-8. [PMID: 39033449 DOI: 10.1016/j.annemergmed.2024.06.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 05/20/2024] [Accepted: 06/07/2024] [Indexed: 07/23/2024]
Abstract
STUDY OBJECTIVE Temperature control trials in cardiac arrest patients have not reliably conferred neuroprotective benefit but have been limited by inconsistent treatment parameters. To evaluate the presence of a time dependent treatment effect, we assessed the association between preinduction time and clinical outcomes. METHODS In this retrospective, single academic center study between 2014 and 2022, consecutive out-of-hospital cardiac arrest (OHCA) patients treated with temperature control were identified. Preinduction was defined as the time from hospital arrival to initiation of a closed-loop temperature feedback device [door to temperature control initiation time], and early door to temperature control device time was defined a priori as <3 hours. We assessed the association between good neurologic outcome (cerebral performance category 1 to 2) and door to temperature control device time using logistic regression. The proportion of patients who survived to hospital discharge was evaluated as a secondary outcome. A sensitivity analysis using inverse probability treatment weighting, created using a propensity score, was performed to minimize measurable confounding. RESULTS Three hundred and forty-seven OHCA patients were included; the early door to temperature control device cohort included 75 (21.6%) patients with a median (interquartile range) door to temperature control device time of 2.50 (2.03 to 2.75) hours, whereas the late door to temperature control device cohort included 272 (78.4%) patients with a median (interquartile range) door to temperature control device time of 5.18 (4.19 to 6.41) hours. In the multivariable logistic regression model, early door to temperature control device time was associated with improved good neurologic outcome and survival before [adjusted odds ratio (OR) (95% confidence interval) 2.36 (1.16 to 4.81) and 3.02 (1.54 to 6.02)] and after [adjusted OR (95% confidence interval) 1.95 (1.19 to 3.79) and 2.14 (1.33 to 3.36)] inverse probability of treatment weighting, respectively. CONCLUSION In our study of OHCA patients, a shorter preinduction time for temperature control was associated with improved good neurologic outcome and survival. This finding may indicate that early initiation in the emergency department will confer benefit. Our findings are hypothesis generating and need to be validated in future prospective trials.
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Affiliation(s)
- Rachel Beekman
- Department of Neurology, Yale School of Medicine, New Haven, CT.
| | - Noah Kim
- Department of Neurology, Yale School of Medicine, New Haven, CT; Geisel School of Medicine, Dartmouth College, Hanover, NH
| | | | - George McGinniss
- Department of Emergency Medicine, Yale School of Medicine, New Haven, CT
| | - Yanhong Deng
- Yale Center for Analytical Sciences, Yale School of Public Health, New Haven, CT
| | - Eva Kitlen
- Department of Neurology, Yale School of Medicine, New Haven, CT; UCSF School of Medicine, University of California San Francisco, San Francisco, CA
| | - Gabriella Garcia
- Department of Neurology, Yale School of Medicine, New Haven, CT; Department of Neurology, University of Pennsylvania, Philadelphia, PA
| | - Charles Wira
- Department of Emergency Medicine, Yale School of Medicine, New Haven, CT
| | - Akhil Khosla
- Department of Pulmonary Critical Care, Yale School of Medicine, New Haven, CT
| | | | - P Elliott Miller
- Section of Cardiovascular Medicine, Department of Internal Medicine, Yale School of Medicine, New Haven, CT
| | - Sarah M Perman
- Department of Emergency Medicine, Yale School of Medicine, New Haven, CT
| | - Kevin N Sheth
- Department of Neurology, Yale School of Medicine, New Haven, CT
| | - David M Greer
- Department of Neurology, Boston University Medical Center, Boston, MA
| | - Emily J Gilmore
- Department of Neurology, Yale School of Medicine, New Haven, CT
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Beekman R, Khosla A, Buckley R, Honiden S, Gilmore EJ. Temperature Control in the Era of Personalized Medicine: Knowledge Gaps, Research Priorities, and Future Directions. J Intensive Care Med 2024; 39:611-622. [PMID: 37787185 DOI: 10.1177/08850666231203596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Hypoxic-ischemic brain injury (HIBI) is the leading cause of death and disability after cardiac arrest. To date, temperature control is the only intervention shown to improve neurologic outcomes in patients with HIBI. Despite robust preclinical evidence supporting hypothermia as neuroprotective therapy after cardiac arrest, there remains clinical equipoise regarding optimal core temperature, therapeutic window, and duration of therapy. Current guidelines recommend continuous temperature monitoring and active fever prevention for at least 72 h and additionally note insufficient evidence regarding temperature control targeting 32 °C-36 °C. However, population-based thresholds may be inadequate to support the metabolic demands of ischemic, reperfused, and dysregulated tissue. Promoting a more personalized approach with individualized targets has the potential to further improve outcomes. This review will analyze current knowledge and evidence, address research priorities, explore the components of high-quality temperature control, and define critical future steps that are needed to advance patient-centered care for cardiac arrest survivors.
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Affiliation(s)
- Rachel Beekman
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
| | - Akhil Khosla
- Department of Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Ryan Buckley
- Department of Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Shyoko Honiden
- Department of Medicine, Yale University School of Medicine, New Haven, CT, USA
| | - Emily J Gilmore
- Department of Neurology, Yale University School of Medicine, New Haven, CT, USA
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Miao B, Skaar JR, O'Hara M, Post A, Kelly T, Abella BS. A Systematic Literature Review to Assess Fever Management and the Quality of Targeted Temperature Management in Critically Ill Patients. Ther Hypothermia Temp Manag 2024; 14:68-79. [PMID: 37219898 DOI: 10.1089/ther.2023.0015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2023] Open
Abstract
Targeted temperature management (TTM) has been proposed to reduce mortality and improve neurological outcomes in postcardiac arrest and other critically ill patients. TTM implementation may vary considerably among hospitals, and "high-quality TTM" definitions are inconsistent. This systematic literature review in relevant critical care conditions evaluated the approaches to and definitions of TTM quality with respect to fever prevention and the maintenance of precise temperature control. Current evidence on the quality of fever management associated with TTM in cardiac arrest, traumatic brain injury, stroke, sepsis, and critical care more generally was examined. Searches were conducted in Embase and PubMed (2016 to 2021) following PRISMA guidelines. In total, 37 studies were identified and included, with 35 focusing on postarrest care. Frequently-reported TTM quality outcomes included the number of patients with rebound hyperthermia, deviation from target temperature, post-TTM body temperatures, and number of patients achieving target temperature. Surface and intravascular cooling were used in 13 studies, while one study used surface and extracorporeal cooling and one study used surface cooling and antipyretics. Surface and intravascular methods had comparable rates of achieving target temperature and maintaining temperature. A single study showed that patients with surface cooling had a lower incidence of rebound hyperthermia. This systematic literature review largely identified cardiac arrest literature demonstrating fever prevention with multiple TTM approaches. There was substantial heterogeneity in the definitions and delivery of quality TTM. Further research is required to define quality TTM across multiple elements, including achieving target temperature, maintaining target temperature, and preventing rebound hyperthermia.
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Affiliation(s)
| | | | | | - Andrew Post
- Trinity Life Sciences, Waltham, Massachusetts, USA
| | - Tim Kelly
- Becton Dickinson, Franklin Lakes, New Jersey, USA
| | - Benjamin S Abella
- Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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Ahn SJ, Kim YH, Lee JH, Lee DW, Hwang SY, Lee BK, Cho IS, Oh SH, Cha K. Relationship between cooling time and neurological outcomes in targeted temperature management. Acad Emerg Med 2022; 29:729-735. [PMID: 35064724 DOI: 10.1111/acem.14440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/19/2021] [Accepted: 01/10/2022] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The relationship between cooling time (CT) variables and neurological outcomes is controversial. We evaluated the relationship between CT and neurological outcomes in out-of-hospital cardiac arrest (OHCA) patients treated with targeted temperature management (TTM). METHODS We conducted a multicenter, prospective, and registry-based study of OHCA survivors treated with TTM. CT was defined as the time from restoration of spontaneous circulation to achievement of the target temperature. The primary outcome was a favorable neurological outcome at 6 months. Multilevel logistic regression analysis was performed to test the relationship between CT and the primary outcome. RESULTS Overall, the favorable neurological outcome rates at 6 months were 29.8% in 937 patients. When CT was stratified into categories of 0-3, 3.1-6, 6.1-9, 9.1-12, and >12 h, according to 3-h intervals, the primary outcome rates were 8.2%, 22.7%, 35.5%, 44.7%, and 44.5%, respectively (p < 0.001). Significant differences were not found in multilevel logistic regression analysis; the adjusted odds ratios (95% confidence interval) of each category for the primary outcome compared to the 0-3-h group were 0.81 (0.32 to 2.04), 0.77 (0.30 to 2.01), 1.26 (0.43 to 3.68), and 1.06 (0.37 to 3.06). CONCLUSIONS We did not find a relationship between CT and neurological outcomes at 6 months.
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Affiliation(s)
- Seong Jun Ahn
- Department of Emergency Medicine, Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
| | - Yong Hwan Kim
- Department of Emergency Medicine, Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
| | - Jun Ho Lee
- Department of Emergency Medicine, Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
| | - Dong Woo Lee
- Department of Emergency Medicine, Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
| | - Seong Youn Hwang
- Department of Emergency Medicine, Samsung Changwon Hospital Sungkyunkwan University School of Medicine Changwon South Korea
| | - Byung Kook Lee
- Department of Emergency Medicine, Chonnam National University Hospital Chonnam National University Medical School Gwangju South Korea
| | - In Soo Cho
- Department of Emergency Medicine Hanil General Hospital Seoul South Korea
| | - Sang Hoon Oh
- Department of Emergency Medicine, Seoul St. Mary's Hospital The Catholic University of Korea College of Medicine Seoul South Korea
| | - Kyoung‐Chul Cha
- Department of Emergency Medicine Yonsei University Wonju College of Medicine Wonju South Korea
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Comparison of hydrogel pad and water-circulating blanket cooling methods for targeted temperature management: A propensity score-matched analysis from a prospective multicentre registry. Resuscitation 2021; 169:78-85. [PMID: 34678333 DOI: 10.1016/j.resuscitation.2021.10.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND Various methods have been used to control body temperature in targeted temperature management (TTM), but few studies have compared specific subtypes of surface cooling systems. The aim of this study was to compare the efficiencies and neurological outcomes between hydrogels pad and water-circulating blanket cooling methods. METHODS We conducted a multicentre, prospective, registry-based study of out-of-hospital cardiac arrest patients treated with TTM between 2015 and 2018. We compared the neurological outcomes, efficacies for cooling, and adverse events between patients who received TTM using a hydrogel pad and water-circulating blanket cooling. Patients were one-to-one matched using propensity scores to adjust for differences in the baseline characteristics of each cooling method. The primary outcome was a favourable neurological outcome at 6 months. RESULTS We included 1,132 patients in the analysis, 870 of whom underwent hydrogel pad cooling, and the remaining 262 underwent water-circulating blanket cooling. In the unmatched cohort, a greater number of adverse events occurred in the water-circulating blanket group. The favourable neurologic outcome rates at 6 months were similar between the hydrogel pad group and the water circulating blanket group (30.2% vs. 29.8%, p = 0.939). In the propensity-matched cohort, which included 184 pairs, the rates of adverse events between the two groups were similar. The similarity of favourable neurologic outcome rates at 6 months between the two groups persisted (28.8% vs. 29.9%, p = 0.819). CONCLUSION Neurological outcomes and adverse events between the hydrogel pad cooling and water-circulating blanket cooling groups were similar.
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Taccone FS, Lascarrou JB, Skrifvars MB. Targeted temperature management and cardiac arrest after the TTM-2 study. Crit Care 2021; 25:275. [PMID: 34348777 PMCID: PMC8336232 DOI: 10.1186/s13054-021-03718-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 07/29/2021] [Indexed: 12/21/2022] Open
Affiliation(s)
- Fabio Silvio Taccone
- Department of Intensive Care, Erasme Hospital, Université Libre de Bruxelles (ULB), Route de Lennik, 808, 1070, Brussels, Belgium.
| | | | - Markus B Skrifvars
- Department of Emergency Care and Services, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
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