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  #1  
Old 02-25-2010
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Lungs Lactate dehydrogenase level in pleural fluid

A 65 year old smoker with a three month history of a dry cough develops bilateral pleural effusions. Thoracocentesis reveals a pleural effusion with a Lactic Acid Dehydrogenase level which is is less than 50% of the serum Lactic Acid Dehydrogenase level.
This suggests that:

A- Patient is probably a diabetic
B- Protein content of the fluid is mostly less than 4 g/dl
C- Bronchogenic carcinoma
D- The specific gravity of the fluid is likely less than 1.02
E- Patient developed empyema
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  #2  
Old 02-26-2010
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Quote:
Originally Posted by MLE-Love View Post
A 65 year old smoker with a three month history of a dry cough develops bilateral pleural effusions. Thoracocentesis reveals a pleural effusion with a Lactic Acid Dehydrogenase level which is is less than 50% of the serum Lactic Acid Dehydrogenase level.
This suggests that:

A- Patient is probably a diabetic
B- Protein content of the fluid is mostly less than 4 g/dl
C- Bronchogenic carcinoma
D- The specific gravity of the fluid is likely less than 1.02
E- Patient developed empyema
I think it's E.
Becoz Measuring LDH in fluid aspirated from a pleural effusion (or pericardial effusion) can help in the distinction between exudates (actively secreted fluid, e.g. due to inflammation) or transudates (passively secreted fluid, due to a high hydrostatic pressure or a low oncotic pressure). LDH is elevated (>200 U/l) in an exudate and low in a transudate. In empyema, the LDH levels generally will exceed 1000 U/l.
Ref:http://en.wikipedia.org/wiki/Lactate_dehydrogenase
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  #3  
Old 05-05-2010
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I would select D bcs it's a transudative effusion so sp.gravity should be less than 1.02
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Old 06-07-2010
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i think the answer is B
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  #5  
Old 05-28-2011
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from qtn it looks like pleural effusion is transudative so i will go with option B, and also tel me wat is rite ans?
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