Author Question: Via what pathway does much of the bronchial venous drainage occur? a. Bronchial veins emptying ... (Read 22 times)

LaDunn · **on:** Jul 16, 2018

Via what pathway does much of the bronchial venous drainage occur?

a. Bronchial veins emptying into the inferior vena cava
b. Bronchopulmonary veins emptying into pulmonary veins
c. Direct connections between bronchial and pulmonary arteries
d. Thebesian venous drainage into the heart chambers

Question 2

What does the detection of lymphatic channels on standard chest radiographs indicate?

a. Abnormally low pressures in the lymphatic channels
b. Anastomoses with the pulmonary circula-tion
c. Normal fibrotic changes that occur with aging
d. System that is overwhelmed by excessive fluid

Sweetkitty24130 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: B
Bronchial venous blood drains through the azygos, hemiazygos, and intercostal veins to the right atrium, and some drains through the pulmonary capillaries to the pulmonary veins and to the left atrium.

Answer to Question 2

ANS: D
Lymphatic channels are usually not visible on chest radiographs. They may be detected if they are distended or thickened by disease. The butterfly pattern that radiates from the hilar region of both lungs during acute development of pulmonary edema is thought to largely be the result of interstitial and lymph vessel distension with fluid. In this situation, the lymphatic drainage sys-tem has been overwhelmed by a sudden and excessive surge of fluid from the circulation. The development of a pleural effusion is also evidence that the lymphatic system is unable to remove excess fluid in the lung.