have any have u guys had the bolt (messuring fluid levels) after lp shunt surgery x my doc informed me today that this is a high posability in my case x

I have not had to do that one, yet, but my doc has talked about it too. It is not common, but does happen, that the ICP reading in the back can be significantly different that the pressure in the brain. It is my understanding that the only way to find out for certain is to do the ICP bolt.