“…Both prolonged halothane and isoflurane anesthesia reduce the clearance of ICG in linear fashion [13,21], presumably resulting from the effects of the anesthetic agents on systemic and splanchnic vessels [6]. In our study, propofol, which has no significant effect on the extraction rate of ICG during prolonged anesthesia [30], was used. However, administration of drugs at the onset of anesthesia or hyperventilation might also affect splanchnic blood flow.…”