Physiological and pharmacological variability in estimated hepatic blood flow in man.
1 Changes in hepatic blood flow have been estimated by measurement of single-dose indocyanine green kinetics in groups of healthy individuals. 2 The effects of change in posture, exercise and ingestion of milk on estimated hepatic blood flow have been assessed. 3 The erect posture and exercise significantly decreased ICG clearance. However, no consistent change was noted after ingestion of milk. 4 The effects of the adrenoceptor blocking drugs phenoxybenzamine, propranolol and labetalol on hepatic blood flow were also assessed. 5 Propranolol and labetalol caused a significant fall in ICG clearance in the supine position. Phenoxybenzamine did not show a consistent change. 6 Posture, exercise and adrenoceptor blockade appear to be important variables affecting hepatic blood flow. They should be considered when kinetics of high-clearance drugs are measured, and may provide a useful model for the assessment of the effects of alterations in hepatic blood flow on the clearance of drugs.
D000317:Adrenergic alpha-Antagonists / Q000494:pharmacology; D000319:Adrenergic beta-Antagonists / Q000494:pharmacology; D000328:Adult; D000818:Animals; D004032:Diet; D005260:Female; D006801:Humans; D007208:Indocyanine Green; D008102:Liver Circulation / Q000187:drug effects*; D008297:Male; D008892:Milk; D005082:Physical Exertion; D011187:Posture
D000317:Adrenergic alpha-Antagonists; D000319:Adrenergic beta-Antagonists; D007208:Indocyanine Green