Pill vs. shot: which blood thinner better prevents deadly clots after emergency surgery?

This study compares two blood thinners—rivaroxaban (a pill) and enoxaparin (a shot)—to see which works better at preventing dangerous blood clots in the legs after emergency abdominal surgery. About 212 adults will take one of the two medicines daily for 7 days after surgery. Researchers will use ultrasound scans to check for clots and monitor for side effects like bleeding.