[quote]Shadow Hunter36 wrote:
I just recently started using 25G exclusively. When you’re actually injecting, it’s a little bit slower with a smaller pin. But I don’t think it really matters what gauge when you’re aspirating since nothing is going through the needle.
What brand barrels are you using? I’ve noticed the Exel’s are a bit sticky and harder to use than Terumo. They just don’t seem to glide as easy for some reason. Even my Terumo 29G slin pins shoot fast and smooth considering the size.
It could just be in my head. But maybe change brands just to see how it works for you.[/quote]
Yeah, I love how easy the 25G go into the skin and muscle. In my experience needle gauge does matter for aspirating since I squeeze a tiny droplet out the end of the needle when I prep it.
That provides lubrication and prevents injecting air. It also makes for oil in the needle which has to be moved when you aspirate. Hence the resistance.
I use B-D barrells. They seem to be very good quality. I noticed the resistance is the oil going through the small gauge needle when I emptied my pre-filled syringes to be filtered. It was really hard to squeeze the oil out of 25G needles to the point that I changed the needle to a larger gauge to accomplish that task.
Anyway, practice makes perfect as they say…