| Objective:The purpose of this study is to evaluate the diagnostic value of color Doppler ultrasound for pneumonia,and to analyze the graphic features of pneumonia in ultrasound examination.Methods:Prospective study method is used to select patients with suspected pneumonia admitted to our hospital from September 2018 to August 2019,and 102 cases meeting the inclusion and exclusion criteria are screened.Among the 102 cases,45 were males and 57 were females.The ages ranged from 21 to 82 years,with an average age of 41.5years.All patients undergo routine blood tests,procalcitonin,C-reactive protein,color Doppler ultrasound of the lungs(hereinafter referred to as lung ultrasound),and chest CT examinations,Chest X-ray examination of some patients.Review patients electronic medical records,clinical laboratory management system and imaging system,collect patients’ data: general information,clinical manifestations,laboratory examination(the levels of blood routine、plasma procalcitonin、C-reactive protein),lung ultrasound and chest imaging results(including chest CT and X-ray)and build database.The diagnostic criteria for pneumonia refer to the latest guidelines for the diagnosis and treatment of adult community-acquired pneumonia and hospital-acquired pneumonia.The imaging examination of this study used chest CT as the criterion.The clinical diagnosis is based on those with clinical manifestations consistent with pneumonia(fever or recent cough,sputum,or exacerbation of existing respiratory disease symptoms),lung signs(pulmonary consolidation signs and / or smell of wet rales),and positive laboratory test.To explore the sensitivity and specificity of color Doppler ultrasound in the diagnosis of pneumonia,compare the coincidence rates of lung ultrasound,chest X-ray,and clinical diagnostic criteria in the diagnosis of pneumonia,and analyze the characteristics of pneumonia on ultrasound images.Statistical analysis was performed on the obtained data,and the count data was expressed as a composition ratio(%),using the χ2 test,the test level α = 0.05,and P<0.05 was considered statistically significant.Results:The imaging examination of this study used chest CT as the criterion and unilateral lung as the observation unit,the diagnostic sensitivity and specificity of pulmonary ultrasound for pneumonia were 85.0% and 89.3%,respectively.The area under the receiver operating characteristic curve is 0.822(95% confidence interval,0.749 to 0.895).Thirty patients with pneumonia underwent chest X-ray examination.Compared with pulmonary ultrasound,the diagnostic coincidence rate was low(79.1%VS 90.1%),but the difference was not statistically significant(P = 0.28).In the diagnosis of pneumonia,the coincidence rate of lung ultrasound diagnosis was higher than the clinical diagnosis standard of pneumonia based on clinical manifestations,lung signs,and laboratory test results(85.1% VS 50.5%),and the difference was statistically significant(P = 0.0003).The sonogram of pneumonia showed that the diagnostic sensitivity of subpleural consolidation was higher than that of B-line,and the pleural line was low(86.7% VS 95% VS 95%),but the specificity(86.7% VS78.6% VS 76.2%),about The index(0.760 VS 0.736 VS 0.713)is higher than the latter two.Conclusion:Lung ultrasound has a high sensitivity and specificity in diagnosing pneumonia.Compared with chest X-rays,the diagnostic coincidence rate is high,but the difference between the two is not statistically significant.Compared with the standard clinical diagnosis of pneumonia based on relevant clinical manifestations,lung signs,and positive laboratory test result,the coincidence rate of LUS diagnosis is high,and the difference is statistically significant.The diagnosis value of subpleural consolidation is the best in the diagnosis of pneumonia,and it is of great significance in diagnosis of pneumonia.Compared with chest imaging,lung ultrasound has the advantages of non-radiative,real-time dynamic,bedside,and good blood flow signal display,which has good clinical value in the diagnosis of pneumonia. |
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