When the healthy lymphatic system is overwhelmed and the lymphatic load of water exceeds the Transport Capacity with LTV maxed out, this is called:

• A. Dynamic insufficiency
• B. Mural insufficiency
• C. Mechanical insufficiency
• D. Combined insufficiency

Answer: (A)

The main idea being tested is how to tell apart edema that comes from too much lymph load versus edema caused by a damaged lymphatic system. Dynamic insufficiency describes a situation in which the lymphatic vessels and pumps are still functioning, but the amount of lymph that needs to be moved is greater than what the system can handle. When the transport capacity reaches its limit (LTV maxed out) and the load keeps rising, the system is overwhelmed not because the vessels are damaged, but because the demand exceeds the functional capacity of a healthy system. That’s why this scenario fits dynamic insufficiency: the lymphatics are healthy, but the workload is too high for them to manage.

In contrast, mechanical or mural insufficiency would involve structural problems that reduce transport capacity itself (damaged vessels or valves), and a combined insufficiency would involve both overload and structural limitation.