Dynamic insufficiency is characterized by

• A. Healthy lymphatic system is overwhelmed, high volume insufficiency
• B. Low lymph production
• C. Blockage of lymphatics
• D. Normal lymph flow

Answer: (A)

Dynamic insufficiency occurs when the lymphatic system is functioning normally but is overwhelmed by a higher-than-usual lymph load. In this situation, lymph production or return is increased—due to activity, heat, inflammation, or other factors—so the transport capacity, though intact, can’t keep up, leading to edema. There’s no blockage or structural damage to the lymphatics; the vessels can transport lymph, they’re just overloaded. This differs from mechanical insufficiency, where transport capacity is reduced because of blockage or damage, and from low lymph production, which wouldn’t overwhelm a healthy system. So the best description is a healthy lymphatic system overwhelmed by a high-volume lymph load.