Lung lobe torsion (LLT) is a pulmonary condition characterized by twisting of a lobe around its bronchovascular pedicle. This causes bronchial obstruction and pulmonary flow compromise, resulting in congestion of the lung lobe. Progressive lobar congestion leads to parenchymal and alveolar edema, hemorrhage and necrosis. While LLT is considered rare in dogs, it is life-threatening and require surgical approach. Therefore, this condition has to be accurately distinguished from others with similar signs that not require surgery. Thoracic radiographs and ultrasonography may be nonspecific, computed tomography is useful but requires a specialized equipment and general anesthesia. Lack of contrast enhancement after contrast medium administration during CT study can be seen when a lung lobe is completely rotated. Contrastenhanced ultrasonography (CEUS) has been described as a valuable imaging method for the study of the vascularity of the peripheral lung consolidation in humans. Compared to contrast-enhanced CT, CEUS is less expensive, does not require anesthesia and ionizing radiation, and eliminates the contraindications of iodinated contrast media. The purpose of this study was to describe CEUS findings in a group of dogs with confirmed LLT. We hypothesized that CEUS may provide useful findings in the diagnosis of twisted lung lobe. The results demonstrated that CEUS may provide useful information and should be considered in the diagnostic algorithm in dogs with LLT.

CONTRAST-ENHANCED ULTRASONOGRAPHIC FINDINGS IN DOGS WITH LUNG LOBE TORSION

CAIVANO, DOMENICO;BIRETTONI, Francesco;BUFALARI, Antonello;ANGELI, Giovanni;GIORGI, MARIA ELENA;PATATA, VALENTINA;PORCIELLO, Francesco
2015

Abstract

Lung lobe torsion (LLT) is a pulmonary condition characterized by twisting of a lobe around its bronchovascular pedicle. This causes bronchial obstruction and pulmonary flow compromise, resulting in congestion of the lung lobe. Progressive lobar congestion leads to parenchymal and alveolar edema, hemorrhage and necrosis. While LLT is considered rare in dogs, it is life-threatening and require surgical approach. Therefore, this condition has to be accurately distinguished from others with similar signs that not require surgery. Thoracic radiographs and ultrasonography may be nonspecific, computed tomography is useful but requires a specialized equipment and general anesthesia. Lack of contrast enhancement after contrast medium administration during CT study can be seen when a lung lobe is completely rotated. Contrastenhanced ultrasonography (CEUS) has been described as a valuable imaging method for the study of the vascularity of the peripheral lung consolidation in humans. Compared to contrast-enhanced CT, CEUS is less expensive, does not require anesthesia and ionizing radiation, and eliminates the contraindications of iodinated contrast media. The purpose of this study was to describe CEUS findings in a group of dogs with confirmed LLT. We hypothesized that CEUS may provide useful findings in the diagnosis of twisted lung lobe. The results demonstrated that CEUS may provide useful information and should be considered in the diagnostic algorithm in dogs with LLT.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11391/1351599
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