INDUCED SPUTUM IN DIAGNOSIS OF SMEAR-NEGATIVE PULMONARY TUBERCULOSIS, CLINICAL AND SUBCLINICAL CHARACTERISTICS OF DIAGNOSED PATIENTS
Main Article Content
Abstract
Background: Induced sputum has been shown to be a safe, easy-to-implement, high-value, low-invasive method that can be repeated and cheaply. Therefore, it can be used to diagnose smear-negative pulmonary tuberculosis, which often had poor clinical symptoms, and difficult in definitive diagnosis, complicated and often requires expensive modern technology. We conducted this study with 2 purposes: 1) Describe some features of the induced sputum technique in smear-negative diagnosis, 2) Analyze some clinical and subclinical characteristics of patients with smear-negative pulmonary tuberculosis. Methods: A cross-sectional study design was used in patients suspected pulmonary tuberculosis, who had at least 2 spontaneous sputum smear - negative. Results: 309 patients participated in the study, of which induced sputum successful rate was 98.1%. The rate of complications was 13.6%, the most common one was mild dyspnea (88.1%). Of the 298 patients eligible for analysis, 45 were diagnosed with pulmonary tuberculosis via MGIT (+). The Kappa between induced sputum and bronchoscopy was 0.81, p = 0.0000, the two methods had almost perfect agreement. Clinical symptoms such as fatigue, weight loss, sweating, and typical X-ray images such as infiltration and calcified fibrosis are significant different in patients with pulmonary tuberulosis (p <0.05). Conclusion: Induced sputum was safe; the successful rate of the procedure was high. Induced sputum had a very good agreement with bronchoscopy on the diagnosis of pulmonary tuberculosis. Some of the valuable clinical and subclinical features in the diagnosis of smear-negative pulmonary tuberculosis were fatigue, weight loss, sweat theft, and X-rays with infiltrated and calcified fibrosis.
Article Details
Keywords
Induced sputum, pulmonary tuberculosis, smear negative
References

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