Final answer:
Lymphangiography is the procedure that requires contrast medium to be delivered into the lymphatic vessels. It is a diagnostic procedure used to evaluate the lymphatic system and diagnose lymphatic disorders.
Step-by-step explanation:
The procedure that requires contrast medium to be delivered into the lymphatic vessels is lymphangiography. Lymphangiography is a diagnostic procedure used to evaluate lymphatic vessels and diagnose lymphatic disorders. It involves injecting a contrast medium into the lymphatic vessels, usually through a small needle, and then taking X-ray images to visualize the lymphatic system.
The contrast medium helps to highlight the lymphatic vessels and identify any abnormalities or blockages in the system. This procedure can help diagnose conditions such as lymphedema, lymphangioma, and lymphatic malformations.
Examples of contrast media used in lymphangiography include lipiodol, Omnipaque, and ethiodized oil. The contrast medium is usually injected into the lymphatic vessels directly or through a lymph node.