[mammoset]

Hi everyone,
I'm new in neuro, just would like to ask few things:
1. There are 2 ways to drain the invasive drains such as active and passive. Why some of the drains can't drain actively eg. EVD and how about subgaleal drain ? What kind of drain that we should't drain in active way ? Is there necessary to milk the drain so frequent post-operatively in craniotomy or cranietomy ?

2. What is the maximum amount can we drain the CSF per day in adult and pediatric and neonates as well.

3. What test would be idealy to perform when we suspect the pt has CSW, DI and SIADH. How to differentiate them ? Which is the most frequent to occur in head injury pt and post cranio pt.

Your help would be much appreciated. Hope to hear from you. Thanks.
Regards,
Mammoset