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Author Bräuer, Anselm ♦ Bovenschulte, Henning ♦ Perl, Thorsten ♦ Zink, Wolfgang ♦ English, Michael John Murray ♦ Quintel, Michael
Source World Health Organization (WHO)-Global Index Medicus
Content type Text
Publisher Lippincott Williams & Wilkins
File Format HTM / HTML
Language English
Difficulty Level Medium
Subject Domain (in DDC) Social sciences ♦ Social problems & services; associations ♦ Social welfare problems & services ♦ Natural sciences & mathematics ♦ Life sciences; biology ♦ Physiology & related subjects ♦ Natural history of organisms ♦ Technology ♦ Medicine & health ♦ Human physiology ♦ Personal health & safety ♦ Pharmacology and therapeutics ♦ Diseases ♦ Agriculture & related technologies ♦ Manufacture for specific uses ♦ Precision instruments & other devices
Subject Domain (in MeSH) Eukaryota ♦ Organisms ♦ Pathological Conditions, Signs and Symptoms ♦ Diseases ♦ Therapeutics ♦ Investigative Techniques ♦ Equipment and Supplies ♦ Analytical, Diagnostic and Therapeutic Techniques and Equipment ♦ Physical Phenomena ♦ Biological Phenomena ♦ Biological Sciences ♦ Technology, Industry, and Agriculture ♦ Technology and Food and Beverages ♦ Environment and Public Health ♦ Health Care
Subject Keyword Discipline Anesthesiology ♦ Bedding And Linens ♦ Heating ♦ Instrumentation ♦ Hypothermia ♦ Prevention & Control ♦ Manikins ♦ Rewarming ♦ Air ♦ Equipment Design ♦ Humans ♦ Models, Theoretical ♦ Temperature ♦ Thermodynamics ♦ Evaluation Studies ♦ Journal Article ♦ Research Support, Non-u.s. Gov't
Abstract BACKGROUND: Forced-air warming has gained acceptance as an effective means to prevent perioperative hypothermia. However, little is known about the influence of air flow and air temperature at the nozzle and the influence of heat distribution in the blankets on the efficacy of these systems. METHODS: We conducted a manikin study with heat flux transducers using five forced-air warming systems to determine the factors that are responsible for heat transfer from the blanket to the manikin. RESULTS: There was no relation between air temperature at the nozzle of the power unit and the resulting heat transfer. There was also no relation between the air flow at the nozzle of the power unit and the resulting heat transfer. However, all blankets performed best at high air flows above 19 L/s. The heat exchange coefficient, the mean temperature gradient between the blanket and the manikin correlated positively with the resulting heat transfer and the difference between the minimal and maximal blanket temperature correlated negatively with the resulting heat transfer. CONCLUSIONS: The efficacy of forced-air warming systems is primarily determined by the blanket. Modern power units provide sufficient heat energy to maximize the ability of the blanket to warm the patient. Optimizing blanket design by optimizing the mean temperature gradient between the blanket and the manikin (or any other surface) with a very homogeneous temperature distribution in the blanket will enable the manufacturers to develop better forced-air warming systems.
Description Country affiliation: Germany
Author Affiliation: Bräuer A ( Department of Anesthesiology, University of Göttingen, Göttingen, Germany. abraeue@gwdg.d)
ISSN 00032999
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Reading ♦ Research ♦ Self Learning
Interactivity Type Expositive
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2009-01-01
Publisher Place United States
e-ISSN 15267598
Journal Anesthesia & Analgesia
Volume Number 108
Issue Number 1


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Source: WHO-Global Index Medicus