In the 60s my uncle Benny had one of those.

As I remember it he bought it in a Swedish specialty shop. Funny, I don't remember him having any wounds. But he might have kept it hidden. He kept a lot of things private. He seemed very pleased with it. You could hear him pumping the vacuum and moaning. Evidently helping the healing process feels good. He always seemed a little more relaxed after one of those treatments.