Pt was on a heparin drip that was started.One hour later the dose was changed and co signed by 2 rn's.The dose was 2037 units/hr running at 20ml/hr.No changes had been made to the pump, line or dose.When in the room around 5 and a half hours later the pump beeped and i was shocked to see that the entire 250ml bag had run out.The pt had possibly received more heparin than ordered.I drew a ptt which came back >200.Heparin was stopped, dr notified.Pump has been sent for maintence to see where the error occurred.
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