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COMPUTED TOMOGRAPHY AND BLOOD GAS ANALYSIS OF ANESTHETIZED BLOODHOUNDS WITH INDUCED PNEUMOTHORAX
Author(s) -
Walker Michael,
Hartsfield Sandee,
Matthews Nora,
White George,
Slater Margaret,
Thoos Jane
Publication year - 1993
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.1740-8261.1993.tb01515.x
Subject(s) - medicine , pneumothorax , atelectasis , thorax (insect anatomy) , lung , arterial blood , functional residual capacity , anesthesia , heart rate , nuclear medicine , blood pressure , lung volumes , radiology , anatomy
Increasingly severe degrees of pneumothorax were produced in 6 adult anesthetized bloodhounds. Computed tomography (CT) of the thorax was performed on each dog to evaluate the effects of pneumo thorax on thoracic and on pulmonary cross‐sectional area (TA and PA). Arterial PO 2 (PaO 2 ) and PCO 2 (PaCO 2 ), heart rate (HR), and mean arterial blood pressure (MAP) were determined and related to the severity of pneumothorax. Volumes of air equal to 1, 1.5 and 2 times functional residual capacity of the lung produced approximately 33%, 40%, and 50% reductions in pulmonary area respectively. These amounts of atelectasis correspond to a radiographically “moderate” degree of pneumothorax. As severity of pneumothorax increased, thoracic area consistently increased, PaO 2 consistently decreased, and PaCO 2 consistently increased, with all being statistically significant relationships (p<0.0001); but HR and MAP were variable and showed no statistical correlation to the degree of pneumothorax (p>0.2).