Final answer:
The activated partial thromboplastin time (aPTT) should be assessed daily for patients receiving anticoagulant therapy.
Step-by-step explanation:
The activated partial thromboplastin time (aPTT) is a blood test used to evaluate the effectiveness of the blood's clotting process.
In most cases, aPTT is assessed on a regular basis, depending on the medical condition and treatment being administered. Typically, patients receiving anticoagulant therapy, such as heparin, will have their aPTT assessed at least once a day. This allows healthcare providers to monitor the therapeutic effect and adjust the dosage if necessary.
Therefore, the correct answer is a) Daily. It is important to note that the frequency of aPTT assessment may vary based on individual circumstances, so it is always best to follow the guidance of a healthcare professional.