Which vein would you prepare for intravenous access in a guinea pig?

• A. Saphenous
• B. Jugular
• C. Cephalic
• D. Femoral

Answer: (A)

The hind limb superficial vein, known as the saphenous vein, is the go-to for IV access in a guinea pig. It sits just under the skin on the hind leg, so it’s easy to see and cannulate when the animal is gently restrained. This makes rapid administration of fluids or drugs straightforward with minimal distress and fewer complications than deeper, harder-to-reach veins. The jugular vein can be used for longer infusions or larger volumes, but it’s deeper and more technically demanding in guinea pigs, with higher risk of local trauma or bleeding. The cephalic vein is another peripheral option, but it can be smaller and less reliable in guinea pigs than the saphenous. The femoral vein is less favored due to accessibility and higher chances of complications. So, the saphenous vein offers a reliable, efficient site for peripheral IV access in this species.