The venous drainage of the apical segment of the right lower pulmonary lobe

Fifty right lungs taken from dead human bodies of both sexes (30 male, 20 female), whose ages ranged from 16 to 81 years, were studied. The left atrium, pulmonary veins and right main bronchus were injected with a 65% solution of Duracryl and then digested in sulphuric acid. The specimens were examined to determine the number and tributaries of the apical segmental veins of the lower lobe. Their length was 36 mm at the most and their diameter 8 mm. Four atypical kinds of tributaries from other segments were distinguished in every fourth case examined, and 5 kinds of accessory veins opening into the immediate veins were present, likewise in every fourth case examined.