The same is done in pleural effusion cases but with directing the tube downwards, backwards and medially then closing the tube with a clamp till u connect it to the underwater seal then draining only 1000-1200 cc (to prevent pulmonary edema) then closing the tube again with re-draining 400 cc every 2 hrs till the flow is decreased to leave the tube opened till full drainage then pleuredesis is done when the fluid flow decreases less than 100 cc/d with total lung inflation.
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