Necessary to inject AIR into VIAL before drawing??

jfreshxo · Aug 30, 2014

I see ppl who will want to draw up 1ml, so they take their needle and pull the plunger to have 1ml of air, then they stick the needle in the vial and inject the air into the vial to create pressure right? Why do we need to create pressure? Is the reason we do this is it makes it easier to draw it up or what? Is it necessary? Thanks

Guillotine · Aug 30, 2014

I'm not expert on the physics, bit yes, makes it easier to draw the oil out. Without injection some air into.vial, vial has vaccuuum effect where it sucks on the oil, makes it harder to pull out in my experience. Which sux when pulling from 2 vials of diff gear same pin.

jfreshxo · Aug 30, 2014

Guillotine said:
I'm not expert on the physics, bit yes, makes it easier to draw the oil out. Without injection some air into.vial, vial has vaccuuum effect where it sucks on the oil, makes it harder to pull out in my experience. Which sux when pulling from 2 vials of diff gear same pin.

Well even when I did inject air into the vial, when I was drawing it up, it wasn't really any easier. didn't notice any difference

Guillotine · Aug 30, 2014

jfreshxo said:
Well even when I did inject air into the vial, when I was drawing it up, it wasn't really any easier. didn't notice any difference

Really? When i do it, the oil sort of starts inserting itself when in flip.vial upsidedown.

jfreshxo · Aug 30, 2014

Guillotine said:
Really? When i do it, the oil sort of starts inserting itself when in flip.vial upsidedown.

It doesn't matter if I inject the air into the oil or the vial that has no oil in it right? maybe i'm not pushing enough air in. How much do you think I should?

Davidoff · Aug 30, 2014

I go .25 ish past my draw point.

Guillotine · Aug 30, 2014

jfreshxo said:
It doesn't matter if I inject the air into the oil or the vial that has no oil in it right? maybe i'm not pushing enough air in. How much do you think I should?

I angle the needle along the edge of vial and slowly inject air along then glass. Learned this from hcg where you don't want to hurt the compound.

I usually do #air in = #oil out + 0.1mL

Since oil thicker air

Xsbobber · Aug 30, 2014

It also depends on the size of the vial and draw needle. When I use 10ml vials I have to inject air or I'll get the vacuum. In the bigger 25ml vials it's not such a big deal. Especially when you've used some of the oil already.

nuttz51 · Aug 30, 2014

I only inject .5 of air. That's all you need to make that vacuum effect. If you put too much air in pressure will be high in there and oil will seep out the sides of the needle when you're drawinf

Warriorblaze · Aug 30, 2014

I inject .1-.2ml more air than the amount of gear I plan on drawing. It's never a problem unless you're drawing 2cc or more from a new vial.

heckler7 · Aug 30, 2014

I can see how this is confusing use this equation when drawing oils for propper ml's to inject. dont forget about adding extra for ester lenght and half life

teezhay · Aug 30, 2014

heckler7 said:
I can see how this is confusing use this equation when drawing oils for propper ml's to inject. dont forget about adding extra for ester lenght and half life

I concur, but that should come as no surprise to anyone who has followed my years of vocal advocacy for Hecklesian physiotrometry. Kudos, Heckler.

uberdawg · Aug 30, 2014

I do this all the time. From what Ive noticed it makes it easier to draw especially when the vial is fuller. Once the vial becomes less full it gets a little harder from. My experience anyway.

BlizzardMan8890 · Sep 1, 2014

If i want. 1 ml i put. 2 ml air in vial. And yes it makes it way easier to draw oil

Necessary to inject AIR into VIAL before drawing??

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