Objective To research high efficiency ,safety and complications of transbronchial needle aspiration biopsy under the guidance of ultrasound bronchoscope (EBUS‐TBNA ) in the early stage diagnosis of pulmonary disease .Methods Totally 28 patients showed intrathoracic mass or mediastinal lymph nodes by chest CT treated from May 2013 to May 2014 underwent EBUS‐TBNA ,and conducted biopsy for pathological examination .Results Among all the 28 patients ,23 patients underwent EBUS‐ TB‐NA ,10 patients were diagnosed as lung cancer ,4 patients had metastatic tumors ,3 patients were diagnosed lymphoma ,3 people were tuberculosis ,2 people were sarcoidosis ,1 patients with inflammatory .The EBUS‐TBNA diagnosis rate of malignant tumor was 74 .0% ,and the diagnosis rate was significantly higher than expectation (53 .2% ,P<0 .01) .The accuracy of EBUS‐TBNA diagno‐sis was as follow :91 .0% for lung cancer ,100 .0% for lymphoma ,75 .0% for metastatic tumor;75 .0% for tuberculosis ,50 .0% for sarcoidosis ,and 100 .0% for inflammatory lesions .Among all EBUS‐TBNA patients ,only two patients had mild hypoxia and one patient had bleeding .Conclusion EBUS‐TBNA was an effective ,minimally invasive ,safe means of inspection for the early diagnosis of respiratory diseases ,especially of mediastinal mass .

By analyzing the situation of market competition by modern hospitals, the paper identifies the core competitiveness of the hospital as the key force to be nurtured and promoted by the hospital in its competition in the medical services market; the basic force that spaces out service levels and profits of hospitals at the same level; the unique cultural force shaped by the hospital in a long period of time; the dynamic force rising constantly to mans needs for medical and health care; the main force driving the sustainable development of the hospital in market competition. The paper also proposes five major core competitive capacities to be especially nurtured and promoted by the hospital, viz. the integrative capacity in management, the influencing capacity of specialized fields, the fighting capacity of the team, the cohesive capacity of culture, and the scheming capacity for marketing.