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Clinical Application of Cytochrome a(+az) Assay of Mitochondria from Liver Specimens:An Aid in Determining Metabolic Tolerance of Liver Remnant for Hepatic Resection

Measurement of cytochrome a(+a(3)) contents in liver mitochondria was made on 52 biopsy specimens of patients with liver tumor. Patients having higher cytochrome a(+a(3)) contents in mitochondria from remaining liver than those of normal human liver mitochondria could survive well major liver resections whether or not associated with liver cirrhosis. However, patients with cytochrome a(+a(3)) contents less than 0.5 x 10(-10) moles per mg protein showed a high rate of postoperative complication (80%) and death (40%) in spite of minor operation. In routinely used liver function tests such as serum albumin, A/G ratio, SGOT, total bilirubin, prothrombin time, BSP and TTT, there were no significant differences between patients with cytochrome a(+a(3)) contents more than 0.5 x 10(-10) moles per mg protein and those less than 0.5. The results indicate that routine laboratory studies do not have much diagnostic value in estimation of a marked decrease of mitochondrial cytochrome a(+a(3)) contents. It is suggested that the measurements of cytochrome a(+a(3)) of the remnant liver should be done prior to a contemplated major resection.