Resp investigations Flashcards
1
Q
When is a fluid exudate from pleural tap according to lights criteria
A
pleural fluid to serum protein > 0.5
pleural fluid to serum LDH > 0.6
pleural fluid LDH value is > two-thirds upper limit of the normal serum value
2
Q
What is lights criteria used for
A
Determine if pleural fluid is an exudate or transudate
3
Q
What is considered in lights criteria
A
Serum to pleural fluid protein ration
Serum to pleural fluid LDH level
Pleural fluid LDH value vs normal
4
Q
What protein level is diagnostic of exudate vs transudate in fluid
A
> 30g/L = exudate
<30g/L = transudate
