shooting water?

[juicyfruit71]

maybe this is a very dumb question but could you draw say 1/10cc of water up in a syringle before drawing the oil so that the water is left in the needle but all oil gets pushed out? and maybe only a tiny bit of water is injected

I'm still trying to figure why you're asking this question? Are you really concerned about the miniscule amount of oil that's left in the pin???

[AnonEagle]

I'm still trying to figure why you're asking this question? Are you really concerned about the miniscule amount of oil that's left in the pin???

seriously he's right its not that big of a deal. a 23g 1.5" pin will retain 0.00303ml of substance... if you're shooting 250mg/ml test for example, you would lose 0.757mg of test.

if that really bothers you, take the vets advice and keep a small air bubble at the top of the syringe. it will have the exact effect you are looking for.

[Bonaparte]

seriously he's right its not that big of a deal. a 23g 1.5" pin will retain 0.00255ml of substance... if you're shooting 250mg/ml test for example, you would lose 0.638mg of test.

It's actually .1 or .15ml, which does add up. This is why I use an air bubble (and not some stupid water trick that wouldn't work).

[AnonEagle]

It's actually .1 or .15ml, which does add up. This is why I use an air bubble (and not some stupid water trick that wouldn't work).

how do you figure?

23G needle Inside Diameter: 0.318mm (0.0125 inches)
needle length: 38.1mm (1.5 inches)
Volume=pi*h*r^2
V=(3.14159265)*(0.0381m)*(0.000159)^2
V=0.00000000303 cubic meters
V=0.00303 ml

but i'll admit I use the air bubble too, but it's always been pretty much for peace of mind. can't go wrong with it; i heard it's taught to the nursing majors at my school to do it that way

edit: woops i believe i used a slightly different gauge at first, my first post has been edited to avoid confusion. however, the difference was minimal.

[juicyfruit71]

how do you figure?

23G needle Inside Diameter: 0.318mm (0.0125 inches)
needle length: 38.1mm (1.5 inches)
Volume=pi*h*r^2
V=(3.14159265)*(0.0381m)*(0.000159)^2
V=0.00000000303 cubic meters
V=0.00303 ml

but i'll admit I use the air bubble too, but it's always been pretty much for peace of mind. can't go wrong with it; i heard it's taught to the nursing majors at my school to do it that way

edit: woops i believe i used a slightly different gauge at first, my first post has been edited to avoid confusion. however, the difference was minimal.

Damn, we gotta math major in here! The bubble thing sounds solid, but I'm afraid of bubbles....I'll pass on the 0.00303 ml, thank you.

[Someguy123]

how do you figure?

23G needle Inside Diameter: 0.318mm (0.0125 inches)
needle length: 38.1mm (1.5 inches)
Volume=pi*h*r^2
V=(3.14159265)*(0.0381m)*(0.000159)^2
V=0.00000000303 cubic meters
V=0.00303 ml

but i'll admit I use the air bubble too, but it's always been pretty much for peace of mind. can't go wrong with it; i heard it's taught to the nursing majors at my school to do it that way

edit: woops i believe i used a slightly different gauge at first, my first post has been edited to avoid confusion. however, the difference was minimal.

except youre forgetting about that whole 1/10th of a cc in the tip of the syringe, before it even gets to filling the pin. pull out a syringe and look at it. below the zero mark, is a big space where you connect the pin.

[Noles12]

how do you figure?

23G needle Inside Diameter: 0.318mm (0.0125 inches)
needle length: 38.1mm (1.5 inches)
Volume=pi*h*r^2
V=(3.14159265)*(0.0381m)*(0.000159)^2
V=0.00000000303 cubic meters
V=0.00303 ml

but i'll admit I use the air bubble too, but it's always been pretty much for peace of mind. can't go wrong with it; i heard it's taught to the nursing majors at my school to do it that way

edit: woops i believe i used a slightly different gauge at first, my first post has been edited to avoid confusion. however, the difference was minimal.

you do realize the oil is not only in the needle itself. It sits in the top part also that connects it to the syringe. From personal experience, out of my 10ml vial i usually lose about .5-1ml when i dont use an air bubble. So i assume there is about .05 ml to .1 ml from each ml that i lose in an injection

[Bonaparte]

how do you figure?

23G needle Inside Diameter: 0.318mm (0.0125 inches)
needle length: 38.1mm (1.5 inches)
Volume=pi*h*r^2
V=(3.14159265)*(0.0381m)*(0.000159)^2
V=0.00000000303 cubic meters
V=0.00303 ml

but i'll admit I use the air bubble too, but it's always been pretty much for peace of mind. can't go wrong with it; i heard it's taught to the nursing majors at my school to do it that way

edit: woops i believe i used a slightly different gauge at first, my first post has been edited to avoid confusion. however, the difference was minimal.

Haha. What a good example of overthinking things. Like the other guys pointed out, regular syringes (unlike slin pins) have what is called a "dead-space", and that is what wastes .1ml of oil.

[AnonEagle]

Haha. What a good example of overthinking things. Like the other guys pointed out, regular syringes (unlike slin pins) have what is called a "dead-space", and that is what wastes .1ml of oil.

yes see my next post a couple posts down.

[Bonaparte]

yes see my next post a couple posts down.

Gotcha. It's all good.

[ottomaddox]

Exactly! C'mon really, OP you're way over teching the situation.

I'm still trying to figure why you're asking this question? Are you really concerned about the miniscule amount of oil that's left in the pin???