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  • Title: Utility of point-of-care lung ultrasound for monitoring cardiogenic pulmonary edema in dogs.
    Author: Murphy SD, Ward JL, Viall AK, Tropf MA, Walton RL, Fowler JL, Ware WA, DeFrancesco TC.
    Journal: J Vet Intern Med; 2021 Jan; 35(1):68-77. PubMed ID: 33270302.
    Abstract:
    BACKGROUND: Point-of-care lung ultrasound (LUS) is an effective tool to diagnose left-sided congestive heart failure (L-CHF) in dogs via detection of ultrasound artifacts (B-lines) caused by increased lung water. HYPOTHESIS/OBJECTIVES: To determine whether LUS can be used to monitor resolution of cardiogenic pulmonary edema in dogs, and to compare LUS to other indicators of L-CHF control. ANIMALS: Twenty-five client-owned dogs hospitalized for treatment of first-onset L-CHF. METHODS: Protocolized LUS, thoracic radiographs (TXR), and plasma N-terminal pro-B-type natriuretic peptide were performed at hospital admission, hospital discharge, and recheck examinations. Lung ultrasound findings were compared between timepoints and to other clinical measures of L-CHF. RESULTS: From time of hospital admission to discharge (mean 19.6 hours), median number of LUS sites strongly positive for B-lines (>3 B-lines per site) decreased from 5 (range, 1-8) to 1 (range, 0-5; P < .001), and median total B-line score decreased from 37 (range, 6-74) to 5 (range, 0-32; P = .002). Lung ultrasound indices remained improved at first recheck (P < .001). Number of strong positive sites correlated positively with respiratory rate (r = 0.52, P = .008) and TXR edema score (r = 0.51, P = .009) at hospital admission. Patterns of edema resolution differed between LUS and TXR, with cranial quadrants showing more significant reduction in B-lines compared to TXR edema score (80% vs 29% reduction, respectively; P = .003). CONCLUSIONS AND CLINICAL IMPORTANCE: Lung ultrasound could be a useful tool for monitoring resolution of pulmonary edema in dogs with L-CHF.
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