a client is receiving 5% dextrose injection 500 ml iv with heparin sodium 25,000 units at 1,000 unit/hour per protocol for acute coronary syndrome (acs). the client's partial thromboplastin time (ptt) is 76 seconds. based on the acs protocol, the infusion should be decreased by 100 units/hour for a ptt between 71 to 80 seconds. the nurse should program the infusion pump to deliver how many ml/hour? (enter numeric value only, whole number.)