What does a pleural effusion look like?
What does a pleural effusion look like? Pleural effusions appear white on X-rays, while air space looks black. If a pleural effusion is likely, you may get more X-ray films while you lie on your side. These can show if the fluid flows freely within the pleural space. How much pleural fluid is normal? In a healthy human, the pleural space contains a small amount of fluid (about 10 to 20 mL), with a low protein concentration (less than 1.5 g/dL). Pleural fluid is filtered at the parietal pleural level from systemic microvessels to the extrapleural interstitium and into the...