Correct Answer: A

Rationale: To prevent unnecessary hypoxia during suctioning of a tracheostomy, the nurse must apply suction for no more than 10 seconds. Prolonged suctioning can lead to hypoxia by removing too much oxygen from the patient. Maintaining a sterile technique (choice B) is important to prevent infection but does not directly relate to preventing hypoxia. Lubricating the catheter tip (choice C) helps with the insertion process but does not specifically address hypoxia prevention. Withdrawing the catheter in a circular motion (choice D) is not a standard practice during tracheostomy suctioning and does not contribute to preventing hypoxia.

Correct Answer: D

Rationale: Grilled chicken breast is a high-protein, low-fiber food that is well-tolerated by clients with Crohn's disease. Crohn's disease is an inflammatory bowel disease that often requires a low-fiber diet to reduce irritation to the digestive tract. Vanilla milkshake is high in dairy and sugar content, which may trigger symptoms in some individuals with Crohn's disease. Buttered popcorn and broccoli are high in fiber, which can be difficult for individuals with Crohn's disease to digest and may exacerbate symptoms.

Correct Answer: C

Rationale: The most crucial information to prevent the spread of lice in schools is to avoid sharing hats, scarves, and combs. This is important as lice can easily spread through shared personal items. Choices A, B, and D are not as critical as choice C in preventing the spread of lice. Reapplication of treatment, boiling or steaming bedding and clothing, and using nit combs are important but not as crucial as avoiding the sharing of personal items.

Correct Answer: A

Rationale: The correct answer is A: Eggs. Eggs are a good protein source and are less likely to cause blockage or odor issues in clients with colostomies. Grapes, pasta, and dried fruits can be problematic for individuals with colostomies as they may cause digestive issues, blockages, or increased gas production. Grapes have skins that are hard to digest, pasta can cause constipation or blockage, and dried fruits are high in fiber which can lead to blockages.

Correct Answer: C

Rationale: The correct answer is C: Chloride. Chloride levels are typically low in cases of hyponatremia, as it often accompanies sodium loss. Magnesium (choice A) is not directly related to hyponatremia. Calcium (choice B) and Potassium (choice D) levels are usually not significantly affected by hyponatremia, making them less likely to be below the expected reference range in this scenario.