You have my sympathy.

NAC. Obviously do the research relevant to the person's condition. But if it's the vac, NAC will be a key part of breaking up blood clots. If already hospitalized, ECMO might be a way to make it happen. As another user suggested, search here using the term 'detox' for a lot of useful discussion.

There are also lots of things besides ventilators to help breathing. Nebulized hydrogen peroxide for one. But they're in the hospital, so their protocol will reign without a friendly doctor to champion your cause with an exception, unless they are moved.

NAC. Obviously do the research relevant to the person's condition. But if it's the vac, NAC will be a key part of breaking up blood clots. If already hospitalized, ECMO might be a way to make it happen. As another user suggested, search here using the term 'detox' for a lot of useful discussion.