A nurse is assessing a client's understanding of a surgical procedure prior to witnessing their signature on the informed consent form. The nurse determines that the client does not understand what the procedure will involve. Which of the following actions should the nurse take?

Choice A rationale:

Administering phenytoin IV no faster than 100 mg/min is crucial to prevent adverse effects such as cardiovascular collapse or severe hypotension. Rapid administration of phenytoin can cause cardiac arrhythmias and should be avoided.

Choice B rationale:

Monitoring plasma phenytoin levels to establish the therapeutic range is a necessary action in managing the client's seizure disorder, but it does not pertain to the specific administration of phenytoin via intermittent bolus.

Choice C rationale:

Adding the medication to the existing IV solution is not appropriate for phenytoin administration. Phenytoin should be administered separately and not mixed with other IV solutions to maintain its stability and prevent interactions.

Choice D rationale:

Monitoring the client for hypertension is not directly related to the administration of phenytoin via intermittent bolus. Hypertension is not a common adverse effect of this medication. However, blood pressure should be monitored as part of routine care for any client on antiepileptic therapy.

Choice A rationale:

A PT (Prothrombin Time) of 12 seconds is not indicative of the effectiveness of heparin therapy for a pulmonary embolism. PT measures the extrinsic pathway of the coagulation cascade, and it is more relevant to monitor in patients on warfarin therapy.

Choice B rationale:

The aPTT (Activated Partial Thromboplastin Time) of 75 seconds is the correct choice as it reflects the effectiveness of unfractionated heparin therapy. Heparin works by inhibiting clotting factors in the intrinsic pathway, and the aPTT is used to monitor heparin's anticoagulant effect. The normal range for aPTT is typically 25-35 seconds.

Choice C rationale:

An INR (International Normalized Ratio) of 1.1 is not the appropriate parameter to assess the effectiveness of heparin therapy. INR is primarily used to monitor the effectiveness of oral anticoagulants like warfarin, not heparin.

Choice D rationale:

The platelet count of 200,000/mm² is not a suitable parameter to evaluate the effectiveness of heparin therapy. Platelet count is important for assessing the risk of bleeding or clotting disorders but does not directly measure the impact of heparin on clotting factors.