Abstract
SummaryA new photometer for the measurement of dark‐adaptation time is described. By its means a prolonged adaptation time has been demonstrated in eases of obstructive jaundice, andevidence is given that this finding is an indication of deficient absorption of vitaminThe serum phosphatase is raised in cases of biliary obstruction and reasons are given for the belief that this is an indication of deficient absorption of vitamin in such cases.The observation of other workers that vitamin K also is deficiently absorbed by the jaundiced patient is discussed, and the method of correcting these various deficiencies by the oral administration of bile salts and vitamin concentrates is described. The importance of applying this method in the preoperative treatment of patients suffering from obstructive jaundice is indicated.
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