A method of making a cast in synthetic resin of the bronchial arteries.

A corrosion cast of the bronchial arteries provides a useful method of demonstrating their origin and distribution. A cast of the bronchial tree is made at the same time to show the position of the arteries. The cast produced by the method described here is limited to the principal branches of these arteries, the finer terminal twigs being lost. However, as these terminal twigs follow closely the branches of the bronchial tree, this defect is not important. The technique described below for preparing a cast of the bronchial arteries and the bronchial tree gives only the details for the injection of the arteries, as the technique for preparing a cast of the bronchial tree has been fully described (Tompsett, 1952). MATERIAL