Which of the following is a correct pairing of a lymphatic impairment type and its definition?

• A. Dynamic insufficiency: Lymph load exceeds transport capacity with LTV maxed
• B. Mechanical insufficiency: Lymphatic load is less than transport capacity
• C. Mural insufficiency: Transport capacity increases with time
• D. Combined insufficiency: None of the above

Answer: (A)

The main idea is that lymphatic impairment is about the balance between how much lymph the tissues produce (the load) and how much the lymphatic system can move (the transport capacity). Dynamic insufficiency means the lymphatic load exceeds transport capacity even when the system is working at full ability—the transport is maxed, yet the input is too high, leading to edema. That’s why this pairing is correct: it captures an overload state with normal or peak transport capacity.

The other descriptions don’t fit as well. Mechanical insufficiency involves reduced transport capacity due to damage or obstruction, so edema can occur even if the load isn’t excessively high. Mural insufficiency refers to changes in the vessel wall that affect transport over time, not a simple overload at maximum capacity. A combined insufficiency would require both high load and reduced transport capacity; the option described here doesn’t reflect that scenario.