Aspiration Question.

How far do you guys pull back on the plunger when you aspirate? I only pull back until I'm sure I see air. The instant a bit of air bubble appears to be entering the syringe, as long as there is no blood, I inject. Someone told me to pull back more, but is there any need?

I don't think there is need for it. Just pull it back a little till you see some bubble.

I agree,no need to create more vacuum than that.

The second that you pull back and if your in a vein... you'll see blood! If not go for it.. but watch movig the pin in and out while aspirating.

I take it you have never hit one yet. ..LOL. It doesn't take much of a pull back. If you are in a vein you won't really pull a vacuum and the pressure that's required to pull back will be signiicantly less. You'll see the plastic tip of the syringe turn dark red and blood will start to fill the main syringe very quickly. It' unmistakable.
-TAZ

re TAZ

Yes I think it's real. In fact I have no big experience, but I think that the high pressure requested to push or pull the oil is due to the bottle-neck represented by the needle. I have done a test of that. With a 21 needle I pull in the syrynge some olive oil, then I push out the air. So I put the needle in a glass of water and I try to aspirate. After a brief high pressure pulling, the water flow into the syrynge quite easily. So because only the oil in the needle (about 0.01ml) create the high-pressure of injection I SUPPOSE that a little rear-shift of the piston is sufficient to empty the needle and from here, if we are in a vein, it's quite easy(whit a normal pressure) pull into the syr. the blood.
This is only an "in vitro" test, I'm not completely sure of that.

In fact the problem could be another. When we self-insert the needle in our ass it's difficult to aspirate 'cause the syringe could slide a little between our fingers(oh shit!). Another important fact is that the needle could trepass or just touch a vein, damaging it.
In these cases, I don't know.

It is for this reason that basskiller suggest to move the pin(needle) in and out??? Is it a good technique?

As soon

well.

Thanks Chemical It's not to move the needle during the injection I have misunderstood it.

Indeed the injection is a critical operation that need the best understanding and clearness.
Your experience and care is precious for us all.

Thanks a lot.

Now is it really true you die if you inject into a small vein?

yea just till you see some bubbles and no blood.

I usually don't pull back more than .5cc. And then let the plunger go back on its own. This can only be done on glutes for me. So I only do it 50% of the time. I love doing Delts.

www.spotinjections.com stick with the legs and gults and maybe the shoulder

I AGREE, GO UNTIL YOU SEE THE BUBBLE, IF YOU SEE BLOOD, THAN I HOPE ITS MORPHINE OR NUBAIN IN THAT SYRINGE. LOL. JK, DONT MESS WITH THAT CRAP.

Like Khan said, DON'T MOVE THE PIN BACK AND FORTH! See my previous thread titled "I thought I was going to die last night."