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HIGH‐RESOLUTION COMPUTED TOMOGRAPHY BRONCHIAL LUMEN TO PULMONARY ARTERY DIAMETER RATIO IN ANESTHETIZED VENTILATED CATS WITH NORMAL LUNGS
Author(s) -
Reid Lauren E.,
Ray Dillon A.,
Hathcock John T.,
Brown Lawrence A.,
Tillson Michael,
Wooldridge Anne A.
Publication year - 2011
Publication title -
veterinary radiology and ultrasound
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.541
H-Index - 60
eISSN - 1740-8261
pISSN - 1058-8183
DOI - 10.1111/j.1740-8261.2011.01870.x
Subject(s) - medicine , bronchiectasis , cats , lumen (anatomy) , bronchus , lung , diameter ratio , bronchial artery , bronchography , pulmonary artery , computed tomographic , nuclear medicine , high resolution computed tomography , anatomy , high resolution , radiology , computed tomography , respiratory disease , cardiology , physics , mechanics , remote sensing , geology
High‐resolution computed tomography ( CT ) is the preferred noninvasive tool for diagnosing bronchiectasis in people. A criterion for evaluating dilation of the bronchus is the bronchial lumen to pulmonary artery diameter (bronchoarterial ratio [ BA ratio]). A ratio of >1.0 in humans or >2.0 in dogs has been suggested as a threshold for identifying bronchiectasis. The purpose of this study was to establish the BA ratio in normal cats. Fourteen specific pathogen‐free cats were selected for analysis of thoracic CT images. The BA ratios of the lobar bronchi of the left cranial (cranial and caudal parts), right cranial, right middle, left caudal, and right caudal lung lobes were measured. The mean of the mean BA ratio of all lung lobes was 0.71 ± 0.05. Individual BA ratios ranged from 0.5 to 1.11. Comparing individual lobes for each cat, there was no significant difference ( P = 0.145) in mean BA ratio between lung lobes. A mean BA ratio for these normal cats was 0.71 ± 0.1, which suggests an upper cut‐off normal value > 0.91 (mean ± 2 standard deviations) between normal and abnormal cats.