TITLE

A METHOD OF STUDYING THE LIVING LUNG IN THE CLOSED THORAX, AND SOME PRELIMINARY OBSERVATIONS

AUTHOR(S)
Krahl, Vernon E.
PUB. DATE
April 1963
SOURCE
Angiology;Apr1963, Vol. 14 Issue 4, p149
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
1. Some of the limitations of observations made upon fixed and stained sections of lung tissue are mentioned. 2. The need for studies on the living lung in the closed thorax is stressed and a method for making such observations is described. 3. Excursions of the caudal margin of the rabbit's lung as viewed through the thoracic window vary from a few millimeters in quiet respiration to 1 cm or more in deepest respiratory efforts. 4. Closely adjacent areas of lung tissue may not move to the same extent nor in the same direction during respiratory excursions of the lung. The technical problems imposed by lung movements are considered and sonic methods of overcoming these difficulties are suggested. 5. The rabbit's thin pulmonary pleura permits visualization of subpleural vessels, alveolar sacs and alveoli. 6. Arterioles that reach the lung surface near the margin of a lobe are illustrated and described. Their branches arising at points of bifurcation enclose acute angles that become larger upon inspiration and smaller upon expiration. 7. The last of the branches to arise as a result of bifurcation of their parent vessels give off the minute twigs (arterioles, precapillaries) that supply the pulmonary capillary networks. These small offsets to the capillary nets arise at right angles from the last small distributing arterioles. The functional significance of the mode of branching is discussed. 8. The reactions of connective tissue and bone to the presence of the steel thoracic window are described. The formation of connective tissue growths between diaphragm and lung, and between the lung and window are described. These growths are not as troublesome and do not appear as early if appropriate caution is exercised during installation of the window. 9. Suggestions are made for the use of the thoracic window as a means of making in vivo studies of several organs other than the lung, including the heart, coronary circulation, intestines, and the gravid uterus.
ACCESSION #
16388299

 

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