Blood clots in severe Covid-19 patients leave clinicians with clues about the illness — but no proven treatments
Doctors treating the sickest Covid-19 patients have zeroed in on a new phenomenon: Some people have developed widespread blood clots, their lungs peppered with tiny blockages that prevent oxygen from pumping into the bloodstream and body.
A number of doctors are now trying to blast those clots with tPA, or tissue plasminogen activator, an antithrombotic drug typically reserved for treating strokes and heart attacks. Other doctors are eyeing the blood thinner heparin as a potential way to prevent clotting before it starts.
