TheLobster
Subscriber
HelloThat's slow. A strong vacuum will suck in 2 mL in a second.
Edit: maybe that's normal speed for an insulin pin. I usually use 21 gauge and it's much faster.
The air passing through an insulin needle is not the same as the air passing through a regular injection needle.
An insulin needle is 0.25–0.23 mm, while a regular injection needle is 0.7–0.8 mm.
They expect the air being drawn from the vial to pass through a small insulin needle in the same way it does through a larger regular needle....
The flow of air through a needle depends on its internal diameter, which directly affects the rate at which air can pass through. Since insulin needles are significantly narrower than regular needles, the air flow is restricted, making the process slower or less efficient. This is why regular needles are generally used for drawing air or liquid from vials
Thank you
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