Correct Answer: C

Rationale: To calculate the mL needed, divide the total dose by the dose per mL. In this case, 40 mg divided by 10 mg/mL equals 4 mL. Therefore, the nurse should administer 4 mL per dose. Choice A, 2 mL, is incorrect because it would only deliver 20 mg of furosemide, which is half the required dose. Choices B and D are also incorrect as they do not provide the accurate amount needed to achieve the 40 mg dosage.

Correct Answer: B

Rationale: A footboard is the correct choice to prevent plantar flexion contractures by maintaining proper alignment of the feet. Plantar flexion contractures involve the foot pointing downward, and a footboard helps keep the foot in a neutral position. Choice A, the sheepskin heel pad, is used for pressure ulcer prevention and comfort but does not specifically address plantar flexion contractures. Choice C, the trochanter roll, is used for hip positioning, not foot alignment. Choice D, the abduction pillow, is used to maintain proper positioning of the legs but does not directly address plantar flexion contractures.

Correct Answer: B

Rationale: Covering the tracheostomy when outside is crucial as it helps prevent dust and other irritants from entering the airway, reducing the risk of complications. Cleaning with alcohol (choice A) can be too harsh for the skin around the tracheostomy site. While replacing the tube weekly (choice C) is important, it is typically done by healthcare providers. Using tap water to clean (choice D) is not recommended as it may introduce contaminants to the tracheostomy site.

Correct Answer: D

Rationale: The correct strategy to include in the teaching after a gastrectomy is to avoid drinking liquids with meals. This helps prevent dumping syndrome, a condition characterized by rapid emptying of undigested food and fluids from the stomach into the small intestine. Choices A, B, and C are incorrect. Drinking fluids between meals is appropriate to maintain hydration, eating three large meals can exacerbate dumping syndrome, and lying down after meals is not recommended as it can increase the risk of reflux.

Correct Answer: D

Rationale: The correct answer is D because rotating injection sites prevents tissue damage and ensures better absorption of insulin. Option A is incorrect as injecting insulin into the thigh before exercise can lead to hypoglycemia. Option B is incorrect as skipping meals can cause blood sugar levels to drop dangerously low. Option C is incorrect as insulin should not be stored in the freezer as it can alter its effectiveness.