Doyen Mayo-Robson visceral clamps are primarily used for?

Doyen Mayo-Robson visceral clamps are specifically designed for the purpose of occluding or clamping off sections of the viscera during surgical procedures. These clamps are able to securely grasp and temporarily occlude blood vessels or structures within the abdominal cavity without causing significant damage to the tissue. This function is crucial during surgeries as it allows the surgeon to manage the blood flow and maintain a clear surgical field, which enhances visibility and control over the operative area.

The unique design of these clamps enables them to encompass a broader surface area while applying uniform pressure, which is essential for safely occluding visceral structures. Thus, their primary application in facilitating visceral occlusion is well recognized in veterinary and surgical procedures, confirming that option B is indeed the correct choice.