Techniques for blood collection from the rat include puncture of the heart, retro-orbital plexus, jugular vein, saphenous vein, tail blood vessels, carotid artery, abdominal aorta, and vena cava.

of blood collection for rodents" (Reinhardt ... Blood sampling from the retro-orbital plexus, the saphenous vein and the tail vein in rats: comparative effects on selected behavioural and blood ...

The authors present a technique for establishing a virtually stress-free dual-catheter system in rats, allowing researchers ... compounds and frequent collection of blood samples.