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Canadian Journal of Anesthesia, Vol 40, 709-713, Copyright © 1993 by Canadian Anesthesiologists' Society

ARTICLES

Cortical blood flow response to hypercapnia during anaesthesia in Moyamoya disease

K Kurehara, H Ohnishi, H Touho, H Furuya and T Okuda
Department of Anaesthesiology, Osaka Neurological Institute, Japan.

Cortical blood flow (CoBF) was measured continuously by the laser-Doppler method to evaluate the effect of hypercapnia on cortical blood flow during ten surgical procedures in ten young patients (mean +/- SD 9.3 +/- 6.4 yr) with Moyamoya disease. The CoBF was 42.8 +/- 13.4 (ml.100 g-1.min-1) during normocapnia (PaCO2 = 39.0 +/- 2.4 mmHg), and 38.7 +/- 14.4 during hypercapnia (PaCO2 = 47.1 +/- 2.5 mmHg). There was a decrease in CoBF with hypercapnia (P < 0.05) so that the normal CoBF response to hypercapnia was impaired during surgery in the patients with Moyamoya disease. He concluded that patients with Moyamoya disease have a precarious cerebral circulation and hypercapnia may be detrimental to the cortical circulation. This suggests that normocapnia is preferable to hypercapnia in patients with Moyamoya disease during anaesthesia.




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Copyright © 1993 by the Canadian Anesthesiologists' Society.