Final answer:
The normal range for aPTT on heparin therapy is 1.5 to 2.5 times the control value. If a patient's aPTT falls within this range, the therapy is effective. If the aPTT is below the normal range, the heparin dosage may need adjustment.
Step-by-step explanation:
The normal range for activated partial thromboplastin time (aPTT) of someone on heparin therapy is generally 1.5 to 2.5 times the control value. The control value refers to the time it takes for the blood to clot without any anticoagulant medications.
If a patient's aPTT falls within this range, it indicates that the level of heparin in their blood is within the therapeutic range and the therapy is effective. The nurse should continue monitoring the patient's aPTT regularly to ensure the heparin dosage is appropriate.
However, if the aPTT is below the normal range, it suggests that the heparin dose may be too low, and the patient's blood may not be adequately anticoagulated. In this case, the nurse should consult with the healthcare provider to adjust the heparin dosage accordingly.