A 17-year-old boy is admitted in sickle cell crisis. Which of the ff. events most likely contributed to the onset of the crisis?

Correct Answer: C

Rationale: The correct answer is C: He walked home in a cold rain. Walking in cold rain can lead to vasoconstriction, which impairs blood flow, increasing the likelihood of a sickle cell crisis in individuals with sickle cell disease. This can cause red blood cells to sickle and block blood vessels, leading to pain and tissue damage. Choices A, B, and D do not directly affect the physiology of sickle cell disease and are less likely to trigger a crisis.

Correct Answer: B

Rationale: The correct answer is B. This statement shows an understanding of reducing HIV transmission by promoting harm reduction strategies like needle exchange programs, which help prevent sharing of contaminated needles. This approach is evidence-based and effective in reducing the spread of HIV among injection drug users. Choice A is incorrect because breastfeeding by HIV-positive mothers can transmit the virus to infants. Choice C is incorrect as birth control pills do not protect against HIV, only against pregnancy. Choice D is incorrect as natural skin condoms do not provide the same level of protection against HIV as latex condoms do.

Correct Answer: B

Rationale: The correct answer is B: All women over age 40 should have an annual mammogram. The American Cancer Society recommends annual mammograms starting at age 40 for women with an average risk of breast cancer. This is based on evidence showing that regular mammograms starting at age 40 help in early detection and improve outcomes. Choice A is incorrect because the recommended age is 40, not 30. Choice C is incorrect as it focuses only on family history, while screening guidelines are based on overall risk factors. Choice D is incorrect because feeling at risk alone is not a sufficient indication for annual mammograms without considering other risk factors.

Correct Answer: B

Rationale: Step 1: Providing a solution of hydrogen peroxide and water as a mouth rinse helps in reducing the pain of stomatitis by promoting oral hygiene and preventing infections. Step 2: Hydrogen peroxide has antimicrobial properties that can help in reducing bacteria in the mouth, which can worsen stomatitis. Step 3: Rinsing with this solution can also help in cleansing the oral mucosa and reducing inflammation, thereby decreasing pain. Step 4: This intervention directly addresses the nursing diagnosis of impaired oral mucous membrane and is focused on symptom management. Summary: A: Recommending the client to discontinue chemotherapy is not a feasible option as it is essential for treating cancer. C: Monitoring platelet and leukocyte counts is important but does not directly address the pain of stomatitis. D: Checking for signs and symptoms is necessary but does not provide direct relief for the pain of stomatitis.

Correct Answer: D

Rationale: The correct answer is D: Leucovorin. Leucovorin is given during methotrexate therapy to protect normal cells by acting as a rescue agent that helps to reduce the toxic effects of methotrexate. It works by enhancing the efficacy of methotrexate in cancer cells while reducing its toxicity in normal cells. Probenecid (A) is not used to protect normal cells during methotrexate therapy. Cytarabine (B) and Thioguanine (C) are other chemotherapeutic agents and are not typically given to protect normal cells during methotrexate therapy.