The nurse is caring for a patient on bed rest. The patient receives low dose heparin daily for the prevention of DVTs. The nurse notes that the patient's aPTT level is within normal range. Which of the following aPTT levels is normal?


•Normal range of aPTT is 30-40 seconds.

•The activated partial thromboplastin time (aPTT) has replaced partial thromboplastin time (PTT). They both measure the efficacy of the intrinsic and common coagulation pathways.

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