A nurse is providing teaching to the guardians of a newborn about measures to prevent sudden infant death syndrome (SIDS). Which of the following guardian statements indicates an understanding of the teaching?

- A is correct because aPTT (activated partial thromboplastin time) measures the effectiveness of heparin therapy and guides dosage adjustments.

- B is incorrect because PT (prothrombin time) measures the effectiveness of warfarin therapy, not heparin.

- C is incorrect because INR (international normalized ratio) is a standardized version of PT that also monitors warfarin therapy, not heparin.

- D is incorrect because WBC count (white blood cell count) measures the body's immune response and has no relation to heparin therapy.

A. "Limit each of the client's visitors to 2 hr per day."
This is incorrect. While visitors should have their exposure limited, the recommended duration is typically much shorter (around 30 minutes to 1 hour), not 2 hours. This is to reduce radiation exposure.

B. "Instruct visitors to stay 1 m (3.3 feet) away from the client."
This is correct. For clients undergoing brachytherapy with a low-dose radiation implant, visitors should maintain a safe distance, usually at least 6 feet (1.8 meters), but some guidelines may state a minimum of 3.3 feet (1 meter) for safety, depending on the specific radiation dose and facility protocols.

C. "Attach a dosimeter to the client's gown."
This is incorrect. Dosimeters are generally worn by healthcare providers, not the patient. The primary purpose is to measure the radiation exposure of healthcare workers, not the patient.

D. "Strain the client's urine."
This is incorrect. Straining urine is not necessary for a patient undergoing brachytherapy. However, it may be important to monitor the urine for signs of radiation leakage, but straining is not a routine part of care.