| Effects of Pharyngeal Cooling on Brain Temperature in Primates and Humans: A Study for Proof of Principle. | |
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MedLine Citation:
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PMID: 22555255 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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BACKGROUND:: Pharyngeal cooling decreases brain temperature by cooling carotid arteries. This study was designed to evaluate the principle of pharyngeal cooling in monkeys and humans. METHODS:: Monkeys (n = 10) were resuscitated following 12 min of cardiac arrest. Pharyngeal cooling (n = 5), in which cold saline (5°C) was perfused into the cuff at the rate of 500 ml/min, was initiated simultaneously with the onset of resuscitation for 30 min. Patients (n = 3) who were in an intensive care unit were subjected to 30 min of pharyngeal cooling under propofol anesthesia. RESULTS:: In the animal study, core brain temperature was significantly decreased compared with that in the control group by 1.9°C (SD = 0.8, P < 0.001) and 3.1°C (SD = 1.0, P < 0.001) at 10 min and 30 min after the onset of cooling, respectively. The cooling effect was more evident in an animal with low postresuscitation blood pressure. Total dose of epinephrine, number of direct current shocks, and recovery of blood pressure were not different between the two groups. The pharyngeal epithelium was microscopically intact on day 5. In the clinical study, insertion of the cuff and start of perfusion did not affect heart rate or blood pressure. Tympanic temperature was decreased by 0.6 ± 0.1°C/30 min without affecting bladder temperature. The pharynx was macroscopically intact for 3 days. CONCLUSIONS:: Pharyngeal cooling rapidly and selectively decreased brain temperature in primates and tympanic temperature in humans and did not have adverse effects on return of spontaneous circulation, even when initiated during cardiac arrest in primates. |
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Authors:
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Yoshimasa Takeda; Hiroshi Hashimoto; Koji Fumoto; Tetsuya Danura; Hiromichi Naito; Naoki Morimoto; Hiroshi Katayama; Soichiro Fushimi; Akihiro Matsukawa; Aiji Ohtsuka; Kiyoshi Morita |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-5-2 |
Journal Detail:
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Title: Anesthesiology Volume: - ISSN: 1528-1175 ISO Abbreviation: - Publication Date: 2012 May |
Date Detail:
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Created Date: 2012-5-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1300217 Medline TA: Anesthesiology Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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* Associate Professor, § Postgraduate, §§ Professor, Department of Anesthesiology, Okayama University Medical School, Okayama, Japan. † Leader, Daiken Medical Co., Osaka, Japan. ‡ Associate Professor, Department of Science and Technology, Hirosaki University, Hirosaki, Japan. ‖ Head of Emergency Center, Emergency Center, Tsuyama Central Hospital, Tsuyama, Japan. # Professor, Department of Anesthesiology, Kawasaki Medical School, Okayama, Japan. ** Assistant Professor, †† Professor, Department of Pathology & Experimental Medicine, Okayama University Medical School. ‡‡ Professor, Department of Human Morphology, Okayama University Medical School. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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