Correct Answer: C

Rationale: Pursed-lip breathing is used to increase the amount of carbon dioxide exhaled (C) in clients with chronic obstructive pulmonary disease (COPD). By doing so, it helps prevent air trapping and enhances gas exchange, ultimately improving respiratory efficiency. While removing secretions (A), reducing air trapping (B), and slowing the respiratory rate (D) can be associated benefits, the primary goal of pursed-lip breathing is to optimize carbon dioxide elimination and enhance breathing mechanics.

Correct Answer: A

Rationale: Before initiating a new medication, the nurse should conduct a thorough assessment of the client to identify any pre-existing health conditions or risk factors that could be affected by the medication. This assessment helps in establishing a baseline for monitoring potential side effects and determining the medication's appropriateness for the client.

Correct Answer: A

Rationale: Epigastric pain that radiates to the back (A) is the hallmark assessment finding of acute pancreatitis. The pancreas lies retroperitoneally in the upper abdomen, so inflammation often causes severe epigastric pain that radiates through to the back. Abdominal pain with guarding (B), nausea and vomiting (C), and increased bowel sounds (D) can also be present in acute pancreatitis but are less specific and may be seen in various other gastrointestinal conditions.

Correct Answer: B

Rationale: To calculate the infusion rate, set up a ratio proportion problem: 50 ml/20 min = x ml/60 min. Cross multiply to solve: 50 60 / 20 = 150 ml/hr. Therefore, the infusion pump should be set to deliver the secondary infusion at a rate of 150 ml/hr.

Correct Answer: D

Rationale: After testing the catheter balloon for patency, the nurse should proceed to apply a sterile lubricant to the end of the catheter. This lubrication helps facilitate the insertion of the catheter smoothly. Placing a sterile drape under the client's buttocks should have been done prior to this step. Discarding the gloves and applying new sterile gloves is not necessary at this point in the procedure. Instructing the client to inhale and exhale slowly is not part of the immediate steps for inserting an indwelling urinary catheter.