I work on a med/surg floor and have a few patients come up with epidurals and require astromorph injections every few hours for pain control. When injecting it, I've heard both that you take a syringe, pull back to see if you get any return (some say you should get nothing, others say you may get a very small amount, but never continue if you get a lot), then do you just unscrew the syringe after pulling back or push the small amount of fluid or nothing back in before injecting the astromorph (I've heard and seen both). After that step, we then inject the astromorph. I saw a person check for return and then push the small amount of fluid back in, but when injecting the astromorph, the patient had some pain, but subsided quickly. There was no air in the astromorph syringe which was drawn using a filtered needle. Want details on this and can't find it anywhere. Thanks.