Open AccessVascular Casting of Adult and Early Postnatal Mouse Lungs for Micro-CT Imaging
Author(s) -
Russell H. Knutsen,
Leah M. Gober,
Joseph Sukinik,
Danielle Donahue,
Elise K. Kronquist,
Mark Levin,
Sean E. McLean,
Beth A. Kozel
Publication year - 2020
Publication title -
journal of visualized experiments
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.596
H-Index - 91
ISSN - 1940-087X
DOI - 10.3791/61242
Subject(s) - lung , medicine , pulmonary artery , vascular resistance , blood flow , biomedical engineering , catheter , pulmonary vasculature , vascular network , radiology , blood pressure , anatomy , cardiology
Blood vessels form intricate networks in 3-dimensional space. Consequently, it is difficult to visually appreciate how vascular networks interact and behave by observing the surface of a tissue. This method provides a means to visualize the complex 3-dimensional vascular architecture of the lung. To accomplish this, a catheter is inserted into the pulmonary artery and the vasculature is simultaneously flushed of blood and chemically dilated to limit resistance. Lungs are then inflated through the trachea at a standard pressure and the polymer compound is infused into the vascular bed at a standard flow rate. Once the entire arterial network is filled and allowed to cure, the lung vasculature may be visualized directly or imaged on a micro-CT (µCT) scanner. When performed successfully, one can appreciate the pulmonary arterial network in mice ranging from early postnatal ages to adults. Additionally, while demonstrated in the pulmonary arterial bed, this method can be applied to any vascular bed with optimized catheter placement and endpoints.