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Medical thoracoscopy can be performed for diagnostic as well as therapeutic purposes. Thoracoscopy in the diagnosis of pleural diseases is highly sensitive for detecting pleural neoplasia with negative pleural fluid cytology and in the diagnosis of tuberculosis. The indication of thoracoscopy in patients with pleural effusion has been optimized. In some studies medical thoracoscopy has been claimed a useful diagnostic tool with a very low rate of complications. However the investigators do not know its safety on high risk patients. Because many patients having suspected malignancy have bed conditions due to other health problems such as coronary heart diseases, COPD, arrythmia, hypoxemia. In this study the investigators aimed to test the safety of medical thoracoscopy in the patients with high risk for complications.
Number of Participants with Adverse Events as a Measure of Safety and Tolerability [ Time Frame: 6 years ]
All participants will have been followed for side effects of medical thoracoscopy. All side effects established in the special forms designed for this study. Side effects measured and recorded according to each characteristic such as pain, air leakege, pneumothorax, empyema, local infection, haemorragy etc.
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