Lung Ultrasound May Be Superior to Chest X-Ray for Diagnosing Lung complcations
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The day may soon come when chest x-ray meets the same fate as the abdominal x-ray — useful only for detection of radio-opaque foreign bodies. This intriguing study requires external validation, but suggests that ultrasound may be superior to x-ray for diagnosing pneumonia — a finding that would have major implications for diagnostic imaging use in developed and developing countries alike.
Lung ultrasound can detect pneumothorax and pulmonary edema, but limited data exist to quantify its accuracy for diagnosing pneumonia. In a prospective study, investigators compared lung ultrasound to chest computed tomography (CT) and chest x-ray among adult patients presenting with unexplained respiratory symptoms to an academic emergency department in Italy.It is also found that after Lung surgery ,pneumonia and others are better diagnosed by USG of Lung than X-ray or ct scan.
CT served as the gold standard for diagnosis of an infiltrate consistent with pneumonia. Patients were enrolled when a CT scan was planned. Bedside lung ultrasound was performed within 3 hours of the CT scan by either emergency physicians or internists, and chest x-ray was performed at the discretion of the treating physician.
During the 8-month study period, 285 patients underwent CT and ultrasound, and, of these, 190 also had a chest x-ray. Chest CT was positive for pneumonia in 87 patients. Sensitivity for diagnosing pneumonia was significantly higher with ultrasound than x-ray (81% vs. 64%), while specificities were statistically similar (94% and 90%).
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