![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-U11arjXexDPiUEhcRoArt2hIYbhQAMV5uzrXIskoxelanx97kP3THdhQ5u2hDN3NXjvPU6PeRZ0iA3BnKW-UOWYRPSoRWLOUqluhNBsgsYb9u_pWpAvpShH5ah2h7sQHwwx7MU99-1gb/s400/CXR+8-10-52.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOBbHUjhXHBIYXHLhJFgX6u9M4MzWa1J01qyEqSWMd7SOzAlnmp6uaDxkBx4YhKIAa_KnCpEGftRKEIp6L3hZIjSR0ddQLHO8LBjH2Ohk_0XgRrdhhVpzZ2PU12-GAC70TVXYOp3YSh5t4/s400/Pleural+effusion+both+side.jpg)
Moderate to large pleural effusions will found homogenous increase in density over the lower lung fields on a supine chest radiograph
About 200 ml of fluid is required to be visible on a PA view but just 50 ml will cause costo-phrenic blunting on a lateral view
Transudates usually occur bilaterally because of the systemic nature of the causative disorders
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi7uxonPFsTrynzZ92KfvjIBWQhRxK1YiSGAB-auzgdFhLLesezNVI1MFtvvv7HPdBBfsUuXFmUDRwMdt8OlVewol649CkqCq3eUzYnu2Ah5UFgAE_yAO0PqEGP5Xz7JP1jIjIktWKvcovc/s400/Pleural+effusion.gif)
The British Thoracic Society suggest that 'aspiration should not be performed for bilateral effusions in a clinical setting strongly suggestive of a pleural transudate, unless there are atypical features or they fail to respond to therapy'
เหมือนมี oligemia at LUL field dx acute PE ddx ARDS
ตอบลบheart failure, ARDS , severe pneumonia
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