<prompt> Regarding rheumatic pleural effusion. what is not truePH less than 7.2LDH greater than 700Glucose greater than 50ADH level 50mgdl  <response>: Pleural fluid studies The typical rheumatoid effusion is a sterile exudative fluid with low pH 7.3, low glucose 60 mg. dL-1 and elevated lactate dehydrogenase may be 700 IU. Rheumatoid factor is often present in pleural fluid, and may be higher than serum levels. Ref Davidson edition23rd pg 530 