Nuwellis Inc (NASDAQ:NUWE) stock is on fire. Shares of the tiny medical device maker surged more than 100% in pre-market trading Tuesday and were still up around 85% by 10 AM ET in early trading, as investors piled into a rare microcap healthcare narrative: patents, a boardroom reset, and a niche Big Pharma largely ignored.For a company with a market value near $2 million, that's a powerful cocktail.A Boardroom Reset Fuels SpeculationLate last week, Nuwellis disclosed a sweeping board shakeup, with three lo ...