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Quantitative Analysis of Liver Function in Percutaneous Transhepatic Biliary Drainage Patients

The diagnostic usefulness of Tc-99m DISIDA cholescintigraphy as a predictor of eventual catheter and hepatic function in patients who have undergone percutaneous transhepatic biliary drainage (PTBD) for extrahepatic biliary obstruction was evaluated. Twentynine cholescintigrams were performed in 14 patients. The examinations were divided into two groups: Group A (N=17), in which the patient's clinical status deteriorated within two to three days post-PTBD, and Group B (N=12), in which the patients did well clinically post- PTBD. No significant difference between the two groups was demonstrated by visual analysis of the analog images or by analysis of serum bilirubin levels. A computer program, developed by the authors, quantitates several parameters of DISIDA kinetics, reflecting hepatic function based upon compartmental analysis. A significant difference (P<.001) was demonstrated between the mean transport constants (blood clearance constant=k1; hepatic clearance constant=k2) for the two groups. It is concluded that serum bilirubin levels and visual inspection of analog images are inadequate independent predictors of hepatic function in patients post PTBD. The transport constants k1, and k2 are quantitative parameters of hepatic function that may be of prognostic value in patients post PTBD.