Correct Answer: B

Rationale: When captopril, an ACE inhibitor, is combined with lithium, it can lead to lithium accumulation. Therefore, monitoring lithium levels is crucial to prevent toxicity. While ACE inhibitors like captopril can cause hyperkalemia, renal insufficiency, and hypotension, the risk of these effects is not increased by the combination of lithium and captopril.

Correct Answer: D

Rationale: Patients experiencing priapism from sildenafil should seek immediate medical attention. Priapism is a serious condition where an erection lasts longer than 4 hours, and if left untreated, it can lead to irreversible damage to the penile tissue, potentially causing permanent erectile dysfunction. Therefore, prompt intervention is crucial to prevent long-term complications.

Correct Answer: D

Rationale: When caring for an infant with a colostomy, it is essential to apply barrier ointment to the skin around the stoma. This helps in preventing skin breakdown and irritation caused by exposure to stool or urine. Changing the ostomy pouch as needed, using appropriate cleaning supplies such as warm water and mild soap (avoiding harsh chemicals like alcohol), and ensuring gentle cleaning of the stoma with a soft cloth or gauze are also important steps in colostomy care. Using baby wipes may not be recommended as they can contain chemicals that may irritate the sensitive skin around the stoma.

Correct Answer: B

Rationale: Administering the vaccine intramuscularly to a child with hemophilia is preferred to reduce the risk of bleeding. Hemophiliac individuals have a decreased ability to form blood clots, and administering vaccines intramuscularly reduces the risk of bleeding compared to subcutaneous administration. Using an appropriate needle length and applying pressure to the site post-injection are important steps, but choosing the intramuscular route is crucial in this case to minimize bleeding complications.

Correct Answer: A

Rationale: The Peabody Developmental Motor Scale (PDMS-2) is specifically designed to assess the motor development of infants and young children, making it the most appropriate choice for evaluating a 2-month-old infant in a high-risk clinic setting.