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.

The animal test involved the introduction of the agent into the tail vein of a rat, followed by an ultrasound exam of the heart. The result: While the image without a contrast agent lacked most ...