Regarding rheumatic pleural effusion. what is not true: (A) PH less than 7.2, (B) LDH greater than 700, (C) Glucose greater than 50, (D) ADH level >50mg/dl
Answer is C. 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