Document Detail

Effect of shivering on brain tissue oxygenation during induced normothermia in patients with severe brain injury.
MedLine Citation:
PMID:  19821062     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: We analyzed the impact of shivering on brain tissue oxygenation (PbtO(2)) during induced normothermia in patients with severe brain injury. METHODS: We studied patients with severe brain injury who developed shivering during induced normothermia. Induced normothermia was applied to treat refractory fever (body temperature [BT] > or =38.3 degrees C, refractory to conventional treatment) using a surface cooling device with computerized adjustment of patient BT target to 37 +/- 0.5 degrees C. PbtO(2), intracranial pressure, mean arterial pressure, cerebral perfusion pressure, and BT were monitored continuously. Circulating water temperature of the device system was measured to assess the intensity of cooling. RESULTS: Fifteen patients (10 with severe traumatic brain injury, 5 with aneurysmal subarachnoid hemorrhage) were treated with induced normothermia for an average of 5 +/- 2 days. Shivering caused a significant decrease in PbtO(2) levels both in SAH and TBI patients. Compared to baseline, shivering was associated with an overall reduction of PbtO(2) from 34.1 +/- 7.3 to 24.4 +/- 5.5 mmHg (P < 0.001). A significant correlation was found between the magnitude of shivering-associated decrease of PbtO(2) (DeltaPbtO(2)) and circulating water temperature (R = 0.82, P < 0.001). CONCLUSION: In patients with severe brain injury treated with induced normothermia, shivering was associated with a significant decrease of PbtO(2), which correlated with the intensity of cooling. Monitoring of therapeutic cooling with computerized thermoregulatory systems may help prevent shivering and optimize the management of induced normothermia. The clinical significance of shivering-induced decrease in brain tissue oxygenation remains to be determined.
Mauro Oddo; Suzanne Frangos; Eileen Maloney-Wilensky; W Andrew Kofke; Peter D Le Roux; Joshua M Levine
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Neurocritical care     Volume:  12     ISSN:  1556-0961     ISO Abbreviation:  Neurocrit Care     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-05     Completed Date:  2010-05-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101156086     Medline TA:  Neurocrit Care     Country:  United States    
Other Details:
Languages:  eng     Pagination:  10-6     Citation Subset:  IM    
Department of Neurosurgery, University of Pennsylvania Medical Center, Philadelphia, PA, USA.
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MeSH Terms
Body Temperature Regulation / physiology*
Brain / physiopathology*
Brain Injuries / physiopathology*
Critical Care
Cryotherapy / instrumentation*
Fever / physiopathology*,  therapy
Hypoxia, Brain / physiopathology
Middle Aged
Oxygen Consumption / physiology*
Shivering / physiology*
Young Adult

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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