We've been having a debate at work on setting up the ventriculostomy with the external transducer to measure the ICP. We're a small hospital and don't get many ventriculostomies, but we've had several lately. On one we were told not to inflate the pressure bag on the external transducer because with it inflated it gives a continuous flush of approximately 3 cc/hr. I completely took the pressure bag off so that it would not be accidently inflated. The next one we get, we're told to inflate the pressure bag because it won't transduce if it's not inflated. Some say you can do that as long as you roller clamp it off so that they won't get the flush, others say leave it open and it won't flush anything if the pigtail isn't pulled. Also, if you're going to clamp it off what's the point of the pressure bag? I was just wondering what some of you neuro ICU nurses say since you probably deal with these a lot more often than we do. I hope my question makes sense.