Correct Answer: B

Rationale: Administering oxygen via nasal cannula (B) is the priority intervention for a client with COPD exacerbation to improve oxygenation. In COPD exacerbation, there is impaired gas exchange leading to hypoxemia, making oxygen therapy the initial priority. Administering bronchodilators (A) helps with bronchodilation but should come after ensuring adequate oxygenation. Encouraging coughing and deep breathing (C) and positioning the client in high Fowler's position (D) are also beneficial interventions, but the first step is to address the oxygenation needs of the client.

Correct Answer: B

Rationale: Acknowledging the client's feelings with empathy is essential in the early stage of adjustment to a colostomy surgery. By saying 'It must be difficult to have this kind of surgery,' the nurse validates the client's emotions and opens up a channel for further communication. Choice A is incorrect because agreeing with the client's denial is not therapeutic and may hinder acceptance. Choice C is inappropriate as it disregards the client's emotional state and autonomy. Choice D involves the surgeon and is not the nurse's role in addressing the client's emotional needs.

Correct Answer: B

Rationale: The most critical reason for initiating intravenous infusions in the upper extremities of adults is to reduce the risk of thrombosis (B). Venous return is typically better in the upper extremities, decreasing the likelihood of thrombus formation, which could be life-threatening if dislodged. Although superficial veins are easily found in the feet and ankles (A), this is not the primary reason for choosing the upper extremities. Handling a leg or foot with an IV (C) is not significantly more challenging than handling an arm or hand. The depth of veins in the feet and ankles (D) does not primarily determine the site for IV placement.

Correct Answer: C

Rationale: Coughing, vomiting, and suctioning can precipitate displacement of the tip of the small-bore feeding tube upward into the esophagus, placing the client at increased risk for aspiration. Checking the sample of fluid withdrawn from the tube (after clearing the tube with 30 ml of air) for acidic (stomach) or alkaline (intestine) values is a more sensitive method for these tubes. The nurse should assess tube placement in this way before taking any other action to ensure the tube is still in the correct position and prevent potential complications. Choice A is incorrect because further assessment is needed due to the risk of tube displacement. Choice B is incorrect as stopping the feeding and involving the family is premature without confirming tube placement. Choice D is incorrect as injecting air and auscultating for gurgling is not the recommended method to confirm tube placement.

Correct Answer: B

Rationale: After applying gloves to irrigate an indwelling urinary catheter using an open technique, the next step for the nurse is to draw up the irrigating solution into the syringe. This step is crucial as it ensures that the solution is ready to be instilled through the catheter to maintain its patency and prevent blockages. Option A is incorrect as emptying the client's urinary drainage bag is not the immediate next step in the irrigation process. Option C is incorrect as securing the client's catheter to the drainage tubing is not necessary at this stage. Option D is incorrect as the question pertains to the action immediately after applying gloves and does not involve instilling the irrigating solution yet.