title: Noninvasive evaluation of venous insufficiency: photoplethysmography versus strain gauge plethysmography.
mesh_terms: D002196:Capillaries / Q000503:physiopathology; D006801:Humans; D007866:Leg / Q000098:blood supply; D010991:Plethysmography; D013924:Thrombophlebitis / Q000503:physiopathology; D014689:Venous Insufficiency / Q000503:physiopathology*