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BRONCHOPULMONARY ANASTOMOSES IN FŒETAL, NEWBORN AND ADULT ANIMALS
Author(s) -
Barer Gwenda R.
Publication year - 1966
Publication title -
quarterly journal of experimental physiology and cognate medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0033-5541
DOI - 10.1113/expphysiol.1966.sp001830
Subject(s) - anastomosis , puppy , medicine , anatomy , pulmonary artery , bronchial artery , cardiology , surgery , biology , lung , ecology
Anastomoses between the bronchial and pulmonary arteries were studied by means of neoprene casts and by injection of a radiopaque substance or dyes. In fœtal lambs and newborn kittens and puppies there were numerous precapillary connections between the two arterial systems, the bronchial arteries appearing as branches of the pulmonary artery. In lambs a few weeks old and in adult cats there were coiled constricted connections between the two arteries. In two adult dogs no precapillary anastomoses were found, but in an 8 weeks old puppy there were constricted anastomoses. No evidence was found suggesting that a great deal of blood flows through these connections in life, but they are probably the basis of some of the shunts which develop in disease. It is suggested that there may be frequent communication between the two arterial systems in fœtal life while the pressure is the same in both, but that after birth the connections close down to different degrees in different species.