Not at all. Physics is physics, it doesn't magically stop just because it's in the body. Just because we put two identical things into use doing 2 different t

Not at all. Physics is physics, it doesn't magically stop just because it's in the body. Just because we put two identical things into use doing 2 different things, doesn't mean they're not the same. A person with a back ache could be prescribed aspirin. Another person with blood clots could also be prescribed aspirin. Clinically these are very different things. The aspirin, and the factory that makes it, and the biochemistry by which it works, is the same. Blood pumps are blood pumps, aspirin is aspirin. What you do with them clinically, and how, can vary widely. Agreed. But that doesn't mean the chemistry, physics, engineering behind them does too.