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Heat related illness

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https://www.readbyqxmd.com/read/29122180/associations-between-heat-exposure-vigilance-and-balance-performance-in-summer-tree-fruit-harvesters
#1
June T Spector, Jennifer Krenz, Miriam Calkins, Dawn Ryan, Jose Carmona, Mengjie Pan, Anna Zemke, Paul D Sampson
BACKGROUND: We sought to evaluate potential mediators of the relationship between heat exposure and traumatic injuries in outdoor agricultural workers. METHODS: Linear mixed models were used to estimate associations between maximum work-shift Wet Bulb Globe Temperature (WBGTmax) and post-shift vigilance (reaction time) and postural sway (total path length) in a cross-sectional sample of 46 Washington State tree fruit harvesters in August-September 2015. RESULTS: The mean (SD) WBGTmax was 27...
February 2018: Applied Ergonomics
https://www.readbyqxmd.com/read/29090983/assessment-of-occupational-exposure-to-heat-stress-and-solar-ultraviolet-radiation-among-groundskeepers-in-an-eastern-north-carolina-university-setting
#2
Nicole Beck, Jo Anne G Balanay, Terri Johnson
Groundskeepers spend most of the year working outdoors, exposing them to heat and solar ultraviolet (UV) radiation and increasing their risk to related adverse health effects. Various studies on heat and UV exposures in different occupations have been published, but those on groundskeepers are rare. The purpose of this study was to assess the exposure to heat stress and solar UV radiation among groundskeepers in an eastern North Carolina university setting. Wet bulb globe temperature (WBGT) index using a heat stress monitor and UV effective irradiance (UVeff) index using a digital UV meter were recorded in various work areas 3 times a day (morning, noon, afternoon) and during 3 seasons (spring, summer, fall)...
November 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/29075863/copeptin-reflects-physiological-strain-during-thermal-stress
#3
Michael John Stacey, Simon K Delves, Sophie E Britland, Adrian J Allsopp, Stephen J Brett, Joanne L Fallowfield, David R Woods
PURPOSE: To prevent heat-related illnesses, guidelines recommend limiting core body temperature (T c) ≤ 38 °C during thermal stress. Copeptin, a surrogate for arginine vasopressin secretion, could provide useful information about fluid balance, thermal strain and health risks. It was hypothesised that plasma copeptin would rise with dehydration from occupational heat stress, concurrent with sympathoadrenal activation and reduced glomerular filtration, and that these changes would reflect T c responses...
October 27, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29074022/a-field-study-of-the-effectiveness-and-practicality-of-a-novel-hybrid-personal-cooling-vest-worn-during-rest-in-hong-kong-construction-industry
#4
Albert P C Chan, Ying Zhang, Faming Wang, Francis F K Wong, Daniel W M Chan
A novel hybrid cooling vest (HCV) incorporated with phase change materials (PCMs) and ventilation fans has been developed for construction workers in Hong Kong to attenuate heat stress and prevent heat-related illnesses, and its effectiveness and practicality have been validated in this study. A total of 140 wear trials involving of 140 workers were conducted in Hong Kong construction sites during the summer time. Each wear trial involves a two-day wear test, of which one day workers wore the HCV (denoted as VEST) during resting, and another day they wore traditional workwear (denoted as CON)...
December 2017: Journal of Thermal Biology
https://www.readbyqxmd.com/read/29063376/recurrent-heat-shock-impairs-the-proliferation-and-differentiation-of-c2c12-myoblasts
#5
Daniel J Bolus, Gobinath Shanmugam, Madhusudhanan Narasimhan, Namakkal S Rajasekaran
Heat-related illness and injury are becoming a growing safety concern for the farmers, construction workers, miners, firefighters, manufacturing workers, and other outdoor workforces who are exposed to heat stress in their routine lives. A primary response by a cell to an acute heat shock (HS) exposure is the induction of heat-shock proteins (HSPs), which chaperone and facilitate cellular protein folding and remodeling processes. While acute HS is well studied, the effect of repeated bouts of hyperthermia and the sustained production of HSPs in the myoblast-myotube model system of C2C12 cells are poorly characterized...
October 24, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/29036206/risk-characterization-of-hospitalizations-for-mental-illness-and-or-behavioral-disorders-with-concurrent-heat-related-illness
#6
Michael T Schmeltz, Janet L Gamble
BACKGROUND: Many studies have found significant associations between high ambient temperatures and increases in heat-related morbidity and mortality. Several studies have demonstrated that increases in heat-related hospitalizations are elevated among individuals with diagnosed mental illnesses and/or behavioral disorders (MBD). However, there are a limited number of studies regarding risk factors associated with specific mental illnesses that contribute, at least in part, to heat-related illnesses (HRI) in the United States...
2017: PloS One
https://www.readbyqxmd.com/read/29024370/classification-of-heat-related-illness-symptoms-among-florida-farmworkers
#7
Abby D Mutic, Jacqueline M Mix, Lisa Elon, Nathan J Mutic, Jeannie Economos, Joan Flocks, Antonio J Tovar-Aguilar, Linda A McCauley
BACKGROUND: Farmworkers working in hot and humid environments have an increased risk for heat-related illness (HRI) if their thermoregulatory capabilities are overwhelmed. The manifestation of heat-related symptoms can escalate into life-threatening events. Increasing ambient air temperatures resulting from climate change will only exacerbate HRI in vulnerable populations. We characterize HRI symptoms experienced by farmworkers in three Florida communities. METHODS: A total of 198 farmworkers enrolled in 2015-2016 were asked to recall if they experienced seven HRI symptoms during the previous work week...
October 12, 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/29020197/sickle-cell-trait-and-heat-injury-among-u-s-army-soldiers
#8
D Alan Nelson, Patricia A Deuster, Francis G O'Connor, Lianne M Kurina
There is concern that sickle cell trait increases risk of exertional collapse, a primary cause of which is heat injury. However, no population-based studies among active individuals have addressed this, representing a critical evidence gap. We conducted a retrospective cohort study of sickle cell trait-tested African American soldiers on active-duty in the U.S. Army anytime between January 2011 and December 2014. Using Cox proportional hazards models and adjusting for demographic and medical factors, we observed no significant associations between sickle cell trait and either mild heat injury (hazard ratio (HR), 1...
August 17, 2017: American Journal of Epidemiology
https://www.readbyqxmd.com/read/28955973/fasting-induces-prominent-proteomic-changes-in-liver-in-very-long-chain-acyl-coa-dehydrogenase-deficient-mice
#9
Wei Wang, Johan Palmfeldt, Al-Walid Mohsen, Niels Gregersen, Jerry Vockley
Very long chain acyl-CoA dehydrogenase (VLCAD) deficiency (VLCADD) is a clinically heterogeneous disorder of mitochondrial fatty acid β-oxidation usually identified through newborn screening. Genotype-phenotype correlations have been defined, but considerable clinical heterogeneity still exists. Symptoms are often induced by physiological stress such as fasting or intercurrent illness, setting it as an important example of environmental effects altering clinical course in an individual with a genetic disease...
December 2016: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28910548/time-of-day-effects-of-exposure-to-solar-radiation-on-thermoregulation-during-outdoor-exercise-in-the-heat
#10
Hidenori Otani, Takayuki Goto, Heita Goto, Minayuki Shirato
High solar radiation has been recognised as a contributing factor to exertional heat-related illness in individuals exercising outdoors in the heat. Although solar radiation intensity has been known to have similar time-of-day variation as body temperature, the relationship between fluctuations in solar radiation associated with diurnal change in the angle of sunlight and thermoregulatory responses in individuals exercising outdoors in a hot environment remains largely unknown. The present study therefore investigated the time-of-day effects of variations in solar radiation associated with changing solar elevation angle on thermoregulatory responses during moderate-intensity outdoor exercise in the heat of summer...
September 14, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28910461/exertional-heat-illness-resulting-in-acute-liver-failure-and-liver-transplantation
#11
Benjamin Boni, Christopher Amann Amann
Heat illness remains a large medical burden for militaries around the world. Mitigating the incidence as well as the complications of heat illness must remain on the forefront of operational planning when operating in hot environments. We report the case of a 27-year-old male U.S. Marine who sustained a heat-related illness resulting in fulminant liver failure and permanent disability. The patient was transferred from the field to a civilian hospital. On hospital day 5, liver failure was identified. The patient was transferred to a transplant center, where he successfully received a liver transplant...
2017: Journal of Special Operations Medicine: a Peer Reviewed Journal for SOF Medical Professionals
https://www.readbyqxmd.com/read/28885961/effectiveness-of-ice-sheet-cooling-following-exertional-hyperthermia
#12
Cory L Butts, Debora L Spisla, J D Adams, Cody R Smith, Kathleen M Paulsen, Aaron R Caldwell, Matthew S Ganio, Brendon P McDermott
BACKGROUND: The procedure of wrapping a heat casualty in ice-water soaked bed sheets to reduce core temperature has received little investigation, despite the practice and recommendation for its use in some military settings. Thus, the purpose of this study was to investigate the cooling efficacy of ice-sheet cooling (ISC) following exertional hyperthermia. METHODS: 13 (11 males, 2 females) participants (age = 23 ± 3 years, height = 176.5 ± 10.3 cm, mass = 78...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28885960/international-classification-of-disease-coding-of-exertional-heat-illness-in-u-s-army-soldiers
#13
David W DeGroot, Gordon Mok, Nathanael E Hathaway
INTRODUCTION: The severity of exertional heat illnesses (EHI) ranges from relatively minor heat exhaustion to potentially life-threatening heat stroke. Epidemiological surveillance of the types of and trends in EHI incidence depends on application of the appropriate International Classification of Disease, 9th Revision (ICD-9) diagnostic code. However, data examining whether the appropriate EHI ICD-9 code is selected are lacking. The purpose of this study was to determine whether the appropriate ICD-9 code is selected in a cohort of EHI casualties...
September 2017: Military Medicine
https://www.readbyqxmd.com/read/28877241/real-time-surveillance-of-heat-related-morbidity-relation-to-excess-mortality-associated-with-extreme-heat
#14
Robert W Mathes, Kazuhiko Ito, Kathryn Lane, Thomas D Matte
The impact of heat on mortality is well documented but deaths tend to occur after (or lag) extreme heat events, and mortality data is generally not available for timely surveillance during extreme heat events. Recently, systems for near-real time surveillance of heat illness have been reported but have not been validated as predictors of non-external cause of deaths associated with extreme heat events. We analyzed associations between daily weather conditions, emergency medical system (EMS) calls flagged as heat-related by EMS dispatchers, emergency department (ED) visits classified as heat-related based on chief complaint text, and excess non-external cause mortality in New York City...
2017: PloS One
https://www.readbyqxmd.com/read/28858055/thermoregulatory-and-perceptual-effects-of-a-percooling-garment-worn-underneath-an-american-football-uniform
#15
Megan L Keen, Kevin C Miller, Micah N Zuhl
Keen, ML, Miller, KC, and Zuhl, MN. Thermoregulatory and perceptual effects of a percooling garment worn underneath an American football uniform. J Strength Cond Res 31(11): 2983-2991, 2017-American football athletes are at the highest risk of developing exertional heat illness (EHI). We investigated whether percooling (i.e., cooling during exercise) garments affected perceptual or physiological variables in individuals exercising in the heat while wearing football uniforms. Twelve male participants (age = 24 ± 4 year, mass = 80...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28829536/pediatric-heat-related-illness-recommendations-for-prevention-and-management-digest
#16
Roberta J Dunn, Tommy Y Kim, Pradip Chaudhari
Infants, children, and adolescents are at increased risk for heat-related illness due to their inability to remove themselves from dangerous environments. Evidence shows that morbidity and mortality from heat illness is related to the length of time core temperature is elevated, so rapid reduction and accurate serial measurements are crucial to prevention of organ system damage and death. The primary methods of patient cooling are conduction (ice-water immersion, cold packs) and convection (moisture and moving air)...
August 22, 2017: Pediatric Emergency Medicine Practice
https://www.readbyqxmd.com/read/28822935/assessing-urban-population-vulnerability-and-environmental-risks-across-an-urban-area-during-heatwaves-implications-for-health-protection
#17
H L Macintyre, C Heaviside, J Taylor, R Picetti, P Symonds, X-M Cai, S Vardoulakis
Heatwaves can lead to a range of adverse impacts including increased risk of illness and mortality; the heatwave in August 2003 has been associated with ~70,000 deaths across Europe. Due to climate change, heatwaves are likely to become more intense, more frequent and last longer in the future. A number of factors may influence risks associated with heat exposure, such as population age, housing type, and location within the Urban Heat Island, and such factors may not be evenly distributed spatially across a region...
January 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28815911/rural-health-service-managers-perspectives-on-preparing-rural-health-services-for-climate-change
#18
Rachael Purcell, Joe McGirr
OBJECTIVE: To determine health service managers' (HSMs) recommendations on strengthening the health service response to climate change. DESIGN: Self-administered survey in paper or electronic format. SETTING: Rural south-west of New South Wales. PARTICIPANTS: Health service managers working in rural remote metropolitan areas 3-7. MAIN OUTCOME MEASURES: Proportion of respondents identifying preferred strategies for preparation of rural health services for climate change...
August 17, 2017: Australian Journal of Rural Health
https://www.readbyqxmd.com/read/28806486/farmworker-vulnerability-to-heat-hazards-a-conceptual-framework
#19
Valerie Vi Thien Mac, Linda A McCauley
PURPOSE: To review factors that impact the effect of hot environments on the human body in order to develop a conceptual model of human biological response. METHODS: The organizing concept for the model development was the multilevel integration of three major factors, exposure to heat, sensitivity and adaptive capacity, and the heat stress response. Exposure of a vulnerable occupational group was used to illustrate the components of the model. FINDINGS: Components of this framework include the hazard (environmental heat stress), vulnerability factors (workplace exposure, sensitivity and adaptive capacity), and the heat stress response...
November 2017: Journal of Nursing Scholarship
https://www.readbyqxmd.com/read/28748745/histamine-poisoning-from-insect-consumption-an-outbreak-investigation-from-thailand
#20
Summon Chomchai, Chulathida Chomchai
BACKGROUND: Insect consumption is a common practice in the Asian culture and all over the world. We are reporting an outbreak investigation of histamine poisoning from ingestion of fried insects. METHODS: On 24 July 2014, a group of students at a seminar presented to Angthong Provincial Hospital, Thailand, with pruritic rash after ingesting snacks consisting of fried insects from a vendor. We initiated an outbreak investigation with retrospective cohort design and collected samples of remaining foods for analyses...
July 27, 2017: Clinical Toxicology
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