I'd like to thank all of you for taking the time to reply tom my question. We have a set protocol where I work. We keep it at the front of the chart so we never have to call a Dr. again it's already a set order on what to do.(i.e.) If the pt's ptt came back at 41.8 (Canada) we would give the pt a 2500 unit bolus and increase to gtt rate by 4 gtts. Then we would do a follow up ptt in 6 hrs. I really like our system now we don't have to bother doctors in the middle of the night since we started this system. Yes we still give the bolus of heparin while the pt is stillon the i.v. heparin. Ontario, CanadaQUOTE]Originally posted by oramar: