Well, yeah. Adipocytes multiply when you get fat. But when you lose weight, they don't apoptose, they just shrink in volume by giving up their lipid stores.
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The problem is that when you kill an adipocyte, it releases all of its triglycerides, which are then free to move around the blood stream. But when blood triglyceride levels are high and there isn't significant oxidation, other metabolic processes are triggered to start to store them. So you kill an adipocyte, release the triglycerides, which get reabsorbed into still living adipocytes, which now get engorged and then multiply again, replacing the fat cells that have been killed.
After learning quite a bit about these processes, I think these devices might actually be useful, not for losing fat, but by eliminating this sort of fat memory. In other words, they should be used after significant weight loss, because adipocytes are relatively empty and externally triggered apoptosis can kill the cells without releasing significant quantities of triglycerides which can be reabsorbed and trigger adipocyte mitosis. I think this would effectively reset that person to a state as if they had never been fat in the first place. Thoughts?
Bear in mind, dialysis does work, however it certainly does not work as well as we hope it should. Dialysis, in all of its different forms, takes a huge toll on the body, and dialysis itself significantly increases mortality; it is also an invasive intervention.
All that being said, we certainly should be doing more research on this.