ObjectiveTo evaluate the diagnostic value of computer tomography (CT)-guided percutaneous lung biopsy and tissue culture in pulmonary diseases. MethodsAfter the preoperative evaluation, 48 patients underwent CT-guided percutaneous lung biopsy were analyzed, and 16 patients accepted tissue culture. The clinical significance of combined diagnostic rate of histopathology and tissue culture was investigated. ResultsAll patients were punctured successfully. The pathological diagnosis confirmed 26 (54.2%) cases with malignant lesions and 16 (33.3%) cases with benign lesions. Six cases could not be pathological diagnosed. The pathological diagnostic rate was 87.5%. Sixteen patients accepted tissue culture. Among them 3 cases with benign lesions were cultured. The positive rate of tissue culture was 18.8%, and improved to 30.0% in the patients with benign lesion. The combined diagnostic rate of histopathology and tissue culture was 89.6%. In addition, the accuracy rate of pathological diagnosis in the group of lung nodules was 95.0%, higher than the others. The accuracy rate of pathological diagnosis in lung nodules of 2cm~3cm in diameter was 100.0%, and the positive rate of tissue culture in lung lump of 3cm~5cm in diameter was 25.0%. The incidence of pneumothorax and hemorrhage was 14.6%. ConclusionsCT-guided percutaneous lung biopsy is a safe and effective diagnostic method. For pulmonary infectious diseases, combination of CT-guided percutaneous lung biopsy and tissue culture can improve the early diagnostic rate.
Objective To observe the changes and influencing factors on pulse oxygen saturation and hemoglobin in Tibetan residents of 4 200 meters above sea level. Methods The health examination data of the Tibetan village residents were collected in Rerong Country, Shannan Prefecture of Tibet autonomous region from January 4 to February 4, 2012. And the information of pulse oxygen saturation was recorded at the same time. The residents were categorized by sex, age and smoking history to observe the difference in each group. Results The clinical data of 234 healthy Tibetan residents were collected with average age of (37.9±13.9) years old, and 97 were male (41.5%). There were no difference in pulse oxygen saturation [(86.1±3.4)% and (86.0±4.7)%, P=0.784) between male and female residents, and heart rate of the male was less than that of the female [(77.9±9.8) bpm and (81.1±12.1) bpm, P=0.036], while the hemoglobin content was higher in male residents [(164.5±15.4) g/L and (139.1±19.2) g/L, P=0.000). With the increase of age, especially in the group older than 60 years, the pulse oxygen saturation significantly decreased (P=0.003), while hemoglobin content showed a gradual increase trend (P=0.000). And in the group which smoking history more than 20 pack-years, the pulse oxygen saturation was lesser than the other groups, and the hemoglobin content increased (P=0.000). Conclusions The pulse oxygen saturation level of Tibetan residents of 4 200 meters above sea level is negatively correlated with age and smoking history, and the level of hemoglobin is positively correlated with age and smoking history. In resting state, there is no significant difference in heart rate between the groups divided by ages.