Studies of the origin of pulmonary blood flow heterogeneity have highlighted the significant role of vessel branching structure on flow distribution. To enable more detailed investigation of structure-function relationships in the pulmonary circulation, an anatomically based finite element model of the arterial and venous networks has been developed to more accurately reflect the geometry found...

• The existence of brouchopulmonary anastomoses has led to the general belief that the blood from the aorta and bronchial arteries can reach the pulmonary vessels and left atrium. There is reasonable evidence to suggest that the reverse can occur. Three observations pertain to the flow of blood from the pulmonary artery to the bronchial veins and right atrium: (a) In 1931 Berry and Daly perfuse...

In the work described in this paper, a method has been developed for direct microscopic observation of the smaller blood vessels of the mammalian lung in the unopened thorax. The behavior of these vessels and the flow of blood through them have been studied under a variety of conditions. We were particularly interested in their normal behavior, in the question of intermittence of the flow of bl...

Cardiovascular diseases (CVD) are a universal health problem that defined the situations impact on heart or blood vessels, it is related to overgrowth and accumulation of fatty deposits within lumen arteries which might lead formation clots (cardiovascular disease, 2018). Also, CVD can be described as group vascular disorders include coronary artery peripheral deep vein thrombosis, pulmonary em...

This study presents a theoretical model of combined series and parallel perfusion in the human pulmonary acinus that maintains computational simplicity while capturing some important features of acinar structure. The model provides a transition between existing models of perfusion in the large pulmonary blood vessels and the pulmonary microcirculation. Arterioles and venules are represented as ...

As pulmonary CT has a lot of noise produced by thoracic imaging and partial volume effect, it is difficult that the computer segments out the correct blood vessels for plain thoracic CT. Therefore, after a deep investigation into the enhancement, segmentation methods and the upgrading ability of fractional differential operation, the paper proposes an automatic segmentation method for pulmonary...

BACKGROUND Lymphatic vessels play a pivotal role in fluid drainage and egress of immune cells from the lung. However, examining murine lung lymphatics is hampered by the expression of classical lymph endothelial markers on other cell types, which hinders the unambiguous identification of lymphatics. The expression of CD90/Thy-1 on lymph endothelium was recently described and we therefore examin...

In complete transposition of the great vessels the pulmonary and systemic circulations exist as two separate circuits. Although the pulmonary and the systemic blood flows may vary widely, the effective pulmonary blood flow is often small (Shaher, 1964). While the acid-base balance in the systemic circuit has been studied by several workers (Sunico, Harned, and Ordway, 1960; Gootman, Scarpelli, ...