Correct Answer: A

Rationale: The first step in the nursing process is to obtain information about the client. This step involves gathering data through assessment to understand the client's needs, health status, and preferences. Developing a care plan (Choice B) comes after the assessment phase. Implementing interventions (Choice C) and evaluating client outcomes (Choice D) occur in subsequent stages of the nursing process. Therefore, the correct initial step is to gather information about the client to form a foundation for providing individualized care.

Correct Answer: D

Rationale: Hydrocolloid dressings are ideal for promoting healing by secondary intention in wound infections. These dressings create a moist environment that supports autolytic debridement and facilitates the healing process. Dry gauze dressings (Option A) may lead to adherence, causing trauma upon removal and disrupting the wound bed. Wet-to-dry dressings (Option B) are primarily used for mechanical debridement and can be painful during dressing changes. Transparent film dressings (Option C) are more suitable for superficial wounds with minimal exudate and are not typically used for wound infections requiring healing by secondary intention.

Correct Answer: B

Rationale: The correct answer is B: Watermelon. Watermelon is high in potassium, which is important to eat daily when taking furosemide to prevent hypokalemia. Furosemide is a diuretic that can lead to potassium loss, so consuming potassium-rich foods like watermelon helps maintain adequate potassium levels. Spaghetti, chicken, and tomatoes are not as high in potassium and therefore not as beneficial in preventing hypokalemia related to furosemide use.

Correct Answer: B

Rationale: Positioning the client with the affected side down following irrigation is crucial as it helps facilitate drainage of the dislodged cerumen and any remaining irrigation solution. This position allows gravity to assist in the removal of the loosened debris. Wearing sterile gloves is a standard precaution in healthcare procedures to prevent infection but is not specific to ear irrigation. Using body-temperature water or a solution at a slightly warmer temperature is recommended to prevent vertigo and discomfort, so using cool fluid is incorrect. Pulling the pinna upward and backward, not downward, straightens the ear canal for adults to facilitate the irrigation process, making choice D incorrect.

Correct Answer: D

Rationale: Maintaining sterile technique when handling a central venous catheter is crucial in preventing infections. This action helps minimize the introduction of pathogens into the catheter site, reducing the risk of contamination and subsequent infection. Changing the catheter dressing every 72 hours, while important, does not directly address the prevention of infection at the insertion site. Flushing the catheter with heparin solution daily helps prevent occlusion but does not primarily focus on infection prevention. Ensuring the catheter is clamped when not in use is essential for preventing air embolism but does not directly relate to infection control.