NCLEX-PN

Answer: B - An aPTT value that greater than 1.5 but less than 2.5 of the client’s pretreatment level is the target of the therapy. With a baseline of 25 seconds, the client’s therapeutic response must fall between 37.5 and 62.5 seconds. The nurse should expect the physician to decrease the flow rate of the heparin infusion if the client’s level is determined to be greater than 62.5 seconds.