Wow! I don’t use anything larger than a 25 Gauge for anything. No, I do not heat my oil for any injections.
It is much easier to push through a 27 Gauge with a 1 mL barrel, but I have successfully used a 3 mL barrel with the 27 Gauge many times. Sure, it may take a little longer and warm oil will help, but I don’t find it necessary.
I just got some 26 gauge and did an injection with my biceps and it is so much better than 23 gauge…wish I had of started using them earlier lol!
Bill and BBB I am an engineer and I never thought I would see fluid mechanics being applied to injections haha…I like this!
I am surprised you guys haven’t brought up frictional force (in this case kinetic friction) yet :)[/quote]
Yeah, I draw with a 23 Gauge. One of the few cases where smaller is better. Ha!
You know, I’m not sure you are 100% accurate Bill. If you were only speaking of the needle, I believe you would be right. We are, however, talking about a complete system. This system involves two pipes of different diameters and lengths, where the second pipe, the needle, represents only a fraction of the total length of the system.
While I do believe it would be slightly more difficult to push through a needle that is the same diameter, yet twice as long, I do not believe it would be twice as hard, when speaking of hand/finger force applied.
My fluid mechanics is rusty, maybe you could help juice82, but I believe, along with a little home experimentation and guesstimation, you could apply Bernoulli’s Equation to figure this out. I don’t believe friction would be a necessary evil for our purposes and could be negated.
Maybe I’ll try it later to see what I can come up with.