Complex sentence: This maneuver is very useful to study deep vein flow and to detect valvular insufficiency, mainly at the popliteal level, and is used when legs are painful or very edematous (swollen with fluid).
Split into simpler sentences: This maneuver is very useful for studying deep vein flow and detecting valvular insufficiency, mainly at the popliteal level. It is used when legs are painful or very edematous (swollen with fluid).