Tail vein

Overview of the tail vein and its use in medical procedures

Tail Vein

The tail vein is a prominent blood vessel located in the tails of certain animals, most notably rodents such as mice and rats. It is commonly used in laboratory settings for various experimental procedures, including blood sampling and intravenous injection.

A researcher performing a tail vein injection on a laboratory mouse.

Anatomy

The tail vein runs along the length of the tail and is easily accessible due to its superficial location. It is a continuation of the caudal vein, which is part of the venous system that returns deoxygenated blood to the heart. The tail vein is often preferred for procedures because it minimizes stress and discomfort to the animal compared to other methods of venous access.

Procedures

Blood Sampling

Blood sampling from the tail vein is a common technique used in preclinical research to monitor biomarkers or pharmacokinetics. The procedure involves restraining the animal and using a small needle to puncture the vein, allowing for the collection of blood samples.

Intravenous Injection

Intravenous injection via the tail vein is a method used to administer substances directly into the bloodstream. This technique is often employed in toxicology studies and drug delivery research. The procedure requires careful handling to ensure accurate delivery and to minimize distress to the animal.

Advantages

The use of the tail vein for these procedures offers several advantages:

• Accessibility: The tail vein is easily accessible and visible, making it a convenient site for repeated access.
• Reduced Stress: Procedures performed on the tail vein are generally less stressful for the animal compared to other methods.
• Minimal Training Required: With proper training, researchers can quickly learn to perform tail vein procedures effectively.

Related pages

• Intravenous therapy
• Laboratory animal science
• Pharmacokinetics
• Toxicology