Correct Answer: D

Rationale: The correct answer is D: Assess the integrity of the patients oral mucosa regularly. Myelosuppression leads to decreased white blood cells, increasing infection risk. The oral mucosa can be a common site for infections. Regular assessment helps in early detection and intervention. A: Encouraging small meals does not directly address infection risk in myelosuppressed patients. B: Providing skin care is important for overall patient care but does not directly address the leading cause of infection-related death. C: Assisting with hygiene is important but does not specifically target the leading cause of infection-related death in oncology patients.

Correct Answer: A

Rationale: The correct answer is A: At the time of menses. This is because breasts are less lumpy and tender during this time, making it easier to detect abnormalities. Performing BSE at other times may lead to false alarms due to hormonal changes. Choice B is incorrect because timing matters for accurate results. Choice C is incorrect as weekly BSE is unnecessary and may cause unnecessary anxiety. Choice D is incorrect as breasts are more lumpy and tender post-menses, potentially making it harder to detect abnormalities.

Correct Answer: B

Rationale: The correct answer is B: Initiate high-flow oxygen therapy. Dyspnea in a patient with lung cancer can be caused by hypoxia due to compromised lung function. High-flow oxygen therapy can help improve oxygenation and alleviate dyspnea. Administering a bolus of normal saline (A) would not directly address the underlying cause of dyspnea. Administering high doses of opioids (C) may lead to respiratory depression and should be used cautiously in patients experiencing dyspnea. Administering bronchodilators and corticosteroids (D) may be appropriate for certain types of dyspnea, but in this case, addressing hypoxia with high-flow oxygen therapy is the most appropriate initial nursing action.

Correct Answer: B

Rationale: The correct answer is B: Undercooked ground beef. Escherichia coli is commonly found in undercooked ground beef, especially if it is contaminated during processing. Ground beef must be cooked to a safe internal temperature to kill any harmful bacteria. Improperly home-canned food (choice A) can also cause foodborne illnesses, but E. coli is more commonly associated with undercooked ground beef. Soft cheese (choice C) is often linked to Listeria contamination, not E. coli. Custard (choice D) is a less likely source of E. coli compared to undercooked ground beef.

Correct Answer: C

Rationale: The correct answer is C because anesthetics used during surgery can decrease bladder contractility, leading to urinary retention. By inserting an indwelling catheter, the nurse ensures proper drainage of urine and prevents bladder distention. This helps to maintain the patient's comfort and prevent complications such as urinary retention and potential bladder injury. Choice A is incorrect because inserting a catheter is not primarily to prevent uncontrollable voiding during surgery. Choice B is incorrect as local trauma does not promote excessive urine incontinence necessitating catheterization. Choice D is incorrect because the primary purpose of catheter insertion is not to prevent interruption of the procedure by bathroom breaks.