A Laboratory Technician Notifies a Nurse That a Patient Who

A laboratory technician notifies a nurse that a patient who is receiving an IV heparin drip per weight-based protocol at a rate of 700 units/hour has an activated partial thromboplastin time (aPTT)of 130 seconds (control is 35 seconds).Which intervention by the nurse is most appropriate initially? 1)Continue the heparin at the current rate to maintain a therapeutic response. 2)Monitor the patient for any symptoms of bleeding while the infusion is maintained. 3)Prepare an injection of vitamin K for emergency injection. 4)Stop heparin for 1 hour, repeat aPTT, and restart the infusion based on the new aPTT.