Background: Hyperbaric oxygen (HBO) therapy of cerebral ischemia has been evaluated in a number of human and animal studies; however, there is presently no consensus on its efficacy. Methods: We present a review of animal and human studies on HBO therapy of cerebral ischemia as well as present potential mechanisms of action of HBO. Results: Animal studies of HBO have shown promise by reducing infarct size and improving neurologic outcome. HBO has also been shown to inhibit inflammation and apoptosis after cerebral ischemia. Early reports in humans also suggested benefit in stroke patients treated with HBO. Recent randomized, controlled human studies, however, have not shown benefit, although all were limited by small sample size. Important differences between animal and human studies suggest HBO might be more effective in stroke within the first few hours and at a pressure of 2–3 ATA. Conclusions: The clinical usefulness of HBO in the treatment of cerebral ischemia is not yet certain. Attention to emerging pathophysiologic data should be taken into consideration in design of any future clinical trials of HBO in acute ischemic stroke.
Michel T. Torbey, MD, MPH, FAHA
Medical College of Wisconsin
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Milwaukee, WI 53226 (USA)
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Received: December 21, 2004
Accepted: June 17, 2005
Published online: October 17, 2005
Number of Print Pages : 10
Number of Figures : 1, Number of Tables : 5, Number of References : 86
Vol. 20, No. 6, Year 2005 (Cover Date: Released November 2005)
Journal Editor: Bogousslavsky, J. (Lausanne)
ISSN: 1015–9770 (print), 1421–9786 (Online)
For additional information: http://www.karger.com/ced
Article / Publication Details
Published online: 11/23/2005
Issue release date: November 2005
Number of Print Pages: 10
Number of Figures: 1
Number of Tables: 5
ISSN: 1015-9770 (Print)
eISSN: 1421-9786 (Online)
For additional information: http://www.karger.com/CED
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