单选题 The nurse is providing postoperative care for a client recovering from abdominal surgery. The client is receiving morphine through a client-controlled analgesia pump. Which finding would indicate that the client is obtaining adequate pain relief?
A. Awakening several times during the night to redose.
B. Respiratory rate of 10 breaths/minute.
C. Pain rating of 2 or 3 on a scale of 0 to 10.
D. Complaint of itching as an adverse effect of the analgesia.

【正确答案】 C

【答案解析】A rating of 2 or 3 on a scale of 0 to 10 is considered mild pain, which is to be expected after abdominal surgery. Redosing during the night, which disrupts sleep, is a disadvantage of this method and doesn't indicate adequate or inadequate pain relief. A depressed respiratory rate of 10 breaths/minute is an adverse effect of an opiate analgesic rather than indication of comfort. Itching is a common adverse effect and bears no relationship to pain relief.