Correct Answer: A

Rationale: To calculate the expected delivery date using Nagele's rule, begin by subtracting 3 months from the first day of the last menstrual period (April 12th), which results in January 12th. Then, add 7 days. Therefore, the expected delivery date would be January 19th (0119). This calculation method helps healthcare professionals estimate the client's due date.

Correct Answer: B

Rationale: Administering the feeding over 30 minutes helps prevent complications such as aspiration. Placing the child in an upright position after the feeding is recommended to reduce the risk of aspiration. It is essential to change the feeding bag and tubing every 3 days to maintain asepsis and prevent infections. Warming the formula in a warm water bath is the correct method as using a microwave can create hot spots that may burn the child's mouth or throat.

Correct Answer: D

Rationale: When caring for a client receiving brachytherapy, it is crucial to handle radioactive sources appropriately. Discarding the radioactive source in a biohazard bag is essential to prevent exposure to radiation. Cleaning equipment before removal, limiting client's visitors, or discarding linens in a double bag are not specific to the management of radioactive sources in brachytherapy.

Correct Answer: B

Rationale: When a client requests the creation of a living will, the nurse's priority is to evaluate the client's understanding of life-sustaining measures. This involves ensuring that the client comprehends the implications of various life-sustaining interventions and can make informed decisions about their care preferences in the event they are unable to communicate them later. It is crucial for the nurse to assess the client's comprehension to ensure that the living will accurately reflects the client's wishes and values.

Correct Answer: A

Rationale: Substernal retractions are a concerning sign of respiratory distress and can indicate acute chest syndrome, a severe complication of sickle-cell anemia. It results from vaso-occlusion in the pulmonary vasculature, leading to impaired oxygenation. Prompt reporting of this symptom is crucial for early intervention to prevent further complications. Hematuria, a high temperature, and sneezing are not specific manifestations of acute chest syndrome and would not warrant immediate notification to the provider in this context.