Respected Me Smith, see if you ask my opinion I will not suggest any instrument for edema reduction, although no practitioner will prescribe you to buy such instrument. see this edema to reduce good amount of effort we need to put. machine will reduce edema temporary and only post operative case for short periods of time can be use. excellent treatment is YOU go for physical therapy exercises, with out self exercise edema will not resolved completely. daily do yogasanas and physical therapy exercises like burgers exercise, good amount of elevation, daily massage from peripheral to Central regional by therapist, ankle toe pumping exercises. compression bandages also help in reducing edema. so please forget to buy any machine and waste your money. you can do a lot with exercise which will give you results slowly but permanently. I hope you have satisfied with this answer.