Thoracoscopy: technique and results in eighteen patients with pleural effusion.

Eighteen patients with pleural effusion were examined. Nine patients had malignant neoplasm and in one the pleura was diffusely involved. Nine patients had pleural effusion of inflammatory origin.

Hemodynamic changes in chronic obstructive pulmonary disease.

Right cardiac catheterization was performed in 136 patients with chronic obstructive pulmonary disease. Forty-three of these patients had a second study a mean of 25 months later (range, 18 to 38 months). The changes in hemodynamic data over a period of 25 months were small.