Near infrared spectroscopy is being used to monitor mixed cerebral oxygen saturation intraoperatively. In 2 patients receiving surgical treatment for acute aortic dissection, cerebral hypoperfusion was detected by near infrared spectroscopy (INVOS3100, Somanetics Corporation, Troy, MI, USA) and corrected accordingly. Near infrared spectroscopy may help to prevent serious neuropsychiatric complications in surgery for aortic arch dissection.
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