lidocaine

[Jonathan Rolt]

Does anyone know how long injected lidocaine takes to absorb?  I have a few 
pts that require lido almost all the way down to the vein before thet can 
tolerate the procedure, but then I get a white out on the screen of the 
ultrasound. I seen the IR doc do  it before and have no problems? Do you 
then have to move up the vein until you can see again and just make a longer 
angle through the  spot? Or is there a time frame, after so many minutes the 
view comes back?  We end up sending some of them down to the OR and they end 
up with a surgical central line which could be prevented if I can figure 
this out. Also does any one have the OR put in lines under 
sedation/conscious sedation I would like to be able to look into that . Have 
the MD order/do the sedation  but still go with a PICC whether its done by 
us or not.