Mathematical Analysis of Extremity Immersion Cooling for Brain Temperature Management PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
Due to low heat conductivity of body tissue, head surface cooling methods for management of the brain temperature during medical treatments often have limited utility. As blood flow rates and surface-to-volume ratios are generally high in the extremities, heat exchange between the body and the environment through the extremities is an important path for heat exchange. This study examines the effects of cold-water extremity immersion on brain temperature by simulation modeling. The work is based on a six-cylinder thermoregulatory model that predicts human thermoregulatory responses to heat, cold, and water immersion. An arteriovenous anastomosis (AVA) response algorithm was added to the base model. Arteriovenous anastomoses are assumed to be controlled by a combination of core and skin temperatures. Our series of simulation scenarios consists of resting in a hot environment (40 degrees C, 75% relative humidity) until the brain temperature rises to 39 degrees C, then continuing the rest for 1 h under one of the following treatments: (A) no cooling; (B) hands immersed in 10 degrees C; (C) feet immersed in 10 degrees C water; (D) hands/feet immersed in 10 degrees C water. The simulation results indicate that within the first 30 min, the hands, feet, or hands/feet immersion cooling resulted in brain temperature drops of 1.7 degrees C, 2.4 degrees C, and 3.3 degrees C, respectively, which correspond to cooling rates of 0.03 degrees C/min, 0.04 degrees C/min, and 0.05 degrees C/min. The predicted values show that extremity immersion cooling is a viable mechanism for simple and effective control of brain temperature.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 5
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Book Description
Due to low heat conductivity of body tissue, head surface cooling methods for management of the brain temperature during medical treatments often have limited utility. As blood flow rates and surface-to-volume ratios are generally high in the extremities, heat exchange between the body and the environment through the extremities is an important path for heat exchange. This study examines the effects of cold-water extremity immersion on brain temperature by simulation modeling. The work is based on a six-cylinder thermoregulatory model that predicts human thermoregulatory responses to heat, cold, and water immersion. An arteriovenous anastomosis (AVA) response algorithm was added to the base model. Arteriovenous anastomoses are assumed to be controlled by a combination of core and skin temperatures. Our series of simulation scenarios consists of resting in a hot environment (40 degrees C, 75% relative humidity) until the brain temperature rises to 39 degrees C, then continuing the rest for 1 h under one of the following treatments: (A) no cooling; (B) hands immersed in 10 degrees C; (C) feet immersed in 10 degrees C water; (D) hands/feet immersed in 10 degrees C water. The simulation results indicate that within the first 30 min, the hands, feet, or hands/feet immersion cooling resulted in brain temperature drops of 1.7 degrees C, 2.4 degrees C, and 3.3 degrees C, respectively, which correspond to cooling rates of 0.03 degrees C/min, 0.04 degrees C/min, and 0.05 degrees C/min. The predicted values show that extremity immersion cooling is a viable mechanism for simple and effective control of brain temperature.
Author: N. Hayashi
Publisher: Springer Science & Business Media
ISBN: 4431539611
Category : Medical
Languages : en
Pages : 352
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Book Description
The International Brain Hypothermia Symposium 2004, held in Tokyo, was a forum for many of the world’s leading researchers and clinicians to present and discuss developments on the cutting edge of this most promising of neurological therapies. With a view to sharing this knowledge and encouraging the spread of new techniques, the editors have compiled these proceedings covering the latest technology and methods. Topics include brain thermo-pooling, hemoglobin-dysfunction-associated neuronal hypoxia, intensive care management of brain hypothermia for severely brain-injured patients, new findings not yet recorded in animal models, and control of hypothermia-associated immune crises. Also included are advanced clinical results from trauma, stroke, and cardiac arrest patients. The result is a volume that will be a valuable resource for professionals in the fields of emergency treatment, critical medicine, and neurosurgery.
Author: Tobias Cibis
Publisher: Springer Nature
ISBN: 3030969215
Category : Technology & Engineering
Languages : en
Pages : 349
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Book Description
This book brings together in-depth information on a wide array of bio-engineering topics and their application to enhance human health, performance, comfort, and survival in extreme environments. Contributions from biomedical engineering, information systems, medicine and physiology, and medical engineering are presented in relation to a broad range of harsh and extreme environmental scenarios, including underwater, terrestrial (both natural and man-made), and space travel. Physicians, engineers, and scientists, as well as researchers and graduate students, will find the book to be an invaluable resource. Details effects of extreme environments on human physiology; Presents human-environment interaction in different scenarios; Overview of engineering challenges and problems in extreme environments.
Author: Theodoros Aslanidis
Publisher: BoD – Books on Demand
ISBN: 1838805184
Category : Medical
Languages : en
Pages : 140
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Book Description
Heart rate variability (HRV) is considered a reliable reflection of the many physiological factors modulating the normal rhythm of the heart. It reflects autonomic nervous system (ANS) function, and as such, it is used in numerous fields of medicine. Written by experts in the field, this book provides a comprehensive overview of HRV. The first section is dedicated to technical themes related to monitoring and the variables recorded. The second section highlights use of HRV in hypothermia. Finally, the third section covers general aspects of HRV application.
Author: Lawrence E. Armstrong
Publisher: Human Kinetics
ISBN: 9780736037716
Category : Medical
Languages : en
Pages : 300
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Book Description
The only text to focus exclusively on heat-related illnesses. Full of practical advice for professionals in a variety of medical, academic, & commercial settings. Learn how to identify, treat & prevent exertional heat illnesses & ensure your sporting events are safe.
Author: Hermann Brugger
Publisher: Edra
ISBN: 8821447340
Category : Medical
Languages : en
Pages : 1331
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Book Description
Mountain emergency medicine has seen exponential development due to the ever increasing number of people who hike or trek as well as practice extreme sports. Emergency physicians and nurses need to be equipped with the necessary training to be able to manage “on the field” accidents and sicknesses as well as their own physical security. Theoretical knowledge is generally of high level but practical expertise is dangerously lacking in many operators. Furthermore, treatment modalities on the field have not been completely codified and are not supported by internationally-accepted guidelines. This book is the first to offer a complete and thorough approach to this field of Emergency Medicine based on the latest research findings.
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1160
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Book Description
Author:
Publisher:
ISBN:
Category : Aviation medicine
Languages : en
Pages : 224
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Book Description
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Author: Webb
Publisher: Oxford University Press
ISBN: 0198855435
Category : Medical
Languages : en
Pages : 1961
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Book Description
Now in paperback, the second edition of the Oxford Textbook of Critical Care is a comprehensive multi-disciplinary text covering all aspects of adult intensive care management. Uniquely this text takes a problem-orientated approach providing a key resource for daily clinical issues in the intensive care unit. The text is organized into short topics allowing readers to rapidly access authoritative information on specific clinical problems. Each topic refers to basic physiological principles and provides up-to-date treatment advice supported by references to the most vital literature. Where international differences exist in clinical practice, authors cover alternative views. Key messages summarise each topic in order to aid quick review and decision making. Edited and written by an international group of recognized experts from many disciplines, the second edition of the Oxford Textbook of Critical Careprovides an up-to-date reference that is relevant for intensive care units and emergency departments globally. This volume is the definitive text for all health care providers, including physicians, nurses, respiratory therapists, and other allied health professionals who take care of critically ill patients.
Author: National Institute for Occupational Safety and Health (U.S.)
Publisher: National Institute on Drug Abuse
ISBN: 9780160946561
Category : Health & Fitness
Languages : en
Pages : 202
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Book Description
Occupational exposure to heat can result in injuries, disease, reduced productivity, and death. To address this hazard, the National Institute for Occupational Safety and Health (NIOSH) has evaluated the scientific data on heat stress and hot environments and has updated the Criteria for a Recommended Standard: Occupational Exposure to Hot Environments [NIOSH 1986a]. This updated guidance includes information about physiological changes that result from heat stress, and relevant studies such as those on caffeine use, evidence to redefine heat stroke, and more. Related products: Weather & Climate collection is available here: https://bookstore.gpo.gov/catalog/weather-climate Emergency Management & First Responders can be found here: https://bookstore.gpo.gov/catalog/emergency-management-first-responders Fire Management collection is available here: https://bookstore.gpo.gov/catalog/fire-management
