ICP during anaesthesia with sevoflurane: a dose-response study. Effect of hypocapnia
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Updated: Oct 28, 2026

Hypercapnic Hyperventilation to Accelerate Emergence from Inhaled Volatile Anesthetics: A Practical Method Using Standard Hospital Equipment
Published on: June 26, 2026
G E Cold1, H Bundgaard, G von Oettingen
1Department of Neuroanaesthesia, Aarhus University Hospital, Denmark.
Abstract:
In patients with a supratentorial cerebral tumor, an increase in sevoflurane concentration from 1.5% (0.7 MAC) to 2.5% (1.3 MAC) did not change the intracranial pressure (ICP) significantly (12 to 14 mm Hg (medians)). However, a significant increase in cerebral blood flow (CBF) from 29 to 39 ml/100 g/min (medians) was disclosed. During administration of sevoflurane 1.5% and 2.5%, a significant decrease in ICP (3.5 and 3.0 mm Hg (median) respectively) was found when PaCO2 was decreased by 0.8 kPa.
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