Flag to Ensure In Vein and No BlockageFlag as usual to ensure that needle is properly inside a vein.Blood entering syringe shows that you are in vein, and that the needle tip is clear of blockage. You can now begin injecting. Keep a slow but steady pressure upon plunger as you inject. You want the liquid to keep flowing. Do not re-boot. Just inject it all in one smooth go. If you are missing you will instantly see because surrounding tissue will immediately react and ballon.
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