Patient was noted to have a significant drop in activated clotting time which was unchanged with increasing heparin from 20 units/kg/hr to 50 units/kg/hr.Additionally a clot in the mediastinal chest tube formed.Antithrombin iii given as an additional treatment for decreased activated clotting time.The heparin syringe needed to be changed for the 24 hour change.At this time it was noted that the syringe pump tubing had cracked and the heparin was leaking into the floor, not being infused into the patient.New tubing was placed and activated clotting time returned to baseline.
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