Which vein is a common blood collection site in rats?

• A. Jugular vein
• B. Lateral Tail Vein
• C. Retro-orbital bleed
• D. Lateral Saphenous Vein

Answer: (A)

The key idea is that site choice for rat blood collection depends on how much blood you need and how often you’ll sample. The jugular vein is a common pick because it is a large, accessible vessel in the neck, allowing you to withdraw relatively larger volumes and to obtain multiple samples over time with proper technique and restraint. This makes it especially useful for routine hematology panels, serum chemistries, or studies requiring serial sampling.

Other sites are chosen for different needs: the lateral tail vein is often used for smaller, quick draws or when a non-terminal method is preferred, though it may yield smaller volumes and can be more variable. The retro-orbital route is generally discouraged due to welfare concerns and regulatory restrictions. The lateral saphenous vein can be used for small to moderate volumes and for certain procedures, but it’s not as commonly relied upon for larger-volume sampling as the jugular.