i don't recall seeing a video on this or i'd have posted it. check out the links on post #6 of this sticky thread:
fyi. . .i was an iv therapist for many years as well as a practicing rn. i always aspirated to get a see that i was getting a small amount of blood before i injected. i drew back enough to get a little bit of a streak of blood into the clear part of the extension tubing or the base of the syringe. reason: to verify that i am in the vein. every chemotherapy nurse i know of does this too. reason: extravasation is a nasty business and once it happens you're stuck with dealing with it--best to prevent it from occurring. you don't necessarily need to do this with a iv that has iv fluids infusing, but i did just for my own verification as iv lines do infiltrate and still look like they are infusing if they are going at a slow rate. i currently have a picc line for chemotherapy. every nurse who accesses my line aspirates the line to make sure they get a blood return before they flush it with saline or start my chemo infusion. it's a beautiful thing to see that streak of blood coming through the line.
from intravenous therapy: clinical principles and practice
, by judy terry, leslie baranowski, rose anne lonsway and carolyn hedrick, published by the intravenous nurses society, 1995:
(page 194) "direct injection, also known as iv push or bolus, is the administration of a drug directly into the venous access device or through the proximal injection port on a continuous infusion. the purpose is to achieve rapid serum concentrations, but this may be accompanied by a greater risk of adverse effects. instead of regulating the rate of administration by the infusion rate, direct injection only requires the time it takes to push the plunger on the syringe.. many drugs have maximum rates at which they may be administered, so the rate of the injection must be timed and the drug injected in increments. because the drug may be incompatible with the infusing solution or heparin may be present in the intermittent device, the vascular access device should be flushed with normal saline before and after injecting the drug."
i'm looking at a couple of books i have that have the iv bolus injection procedure in them and none of them say to aspirate for blood prior to injection, but. . .i would still do it. having worked with ivs for many years, it is still one of the best ways i know to confirm patency of the iv. just be prudent and don't pull up buckets of blood!