Page 334 - Small Animal Internal Medicine, 6th Edition

306 PART II Respiratory System Disorders

VetBooks.ir

c b
TW

BAL

FIG 20.20
The region of the lower respiratory tract that is sampled by bronchoalveolar lavage (BAL)
in comparison with the region sampled by tracheal wash (TW). The solid line (b) within
the airways represents a bronchoscope or a modified feeding tube. The open lines (c)
represent the tracheal wash catheter. Bronchoalveolar lavage yields fluid representative of
the deep lung, whereas tracheal wash yields fluid representative of processes involving
major airways, including diffuse bronchitis, bacterial bronchopneumonia, and aspiration
pneumonia.

FIG 20.21
The region of the lower respiratory tract presumed to be sampled by nonbronchoscopic
bronchoalveolar lavage in cats using an endotracheal tube.