The protein level in pleural fluid helps differentiate between transudates and exudates, indicating different underlying conditions.
To properly interpret the protein level in pleural fluid, it's important to consider the patient's serum total protein level as well. The protein level aids in determining whether the fluid is a transudate or an exudate. Here’s a breakdown based on the reference provided:
- Transudate: If the patient's serum total protein is normal and the pleural fluid protein is less than 25 g/L, the fluid is classified as a transudate.
- Exudate: If the pleural fluid protein is greater than 35 g/L, the fluid is classified as an exudate.
In essence, the pleural fluid protein level, interpreted in conjunction with the serum total protein level, is a valuable tool in diagnosing the etiology of pleural effusions.
