Blood sampling ... the jugular vein. The jugular vein is typically located by counting nine ventral scales cranial to the heart 2. The sample is collected by blindly inserting the needle.

If a medical professional has ever had a hard time getting a needle ... the veins and arteries beneath it in three dimensions. This allows medical professionals to find exactly the blood vessel ...

The investigator places the rat in a plastic restraining tube with its ... As soon as blood backflush is visible (when only the very tip of the needle is in the vein), the investigator tilts ...

but it felt significantly different for me than when they had to poke around my veins.” Becton, a Franklin Lakes, N.J., ...

Intravenous injection is a commonly used method of directly injecting drugs into blood vessels ... effect of the needle can ...