The nurse is caring for a client who underwent a lumbar laminectomy 2 days ago. Which of the following findings should the nurse consider abnormal ？（）
A．More back pain than the first postoperative day.
B．Paresthesia in the dermatomes near the wounds.
C．Urinary retention or incontinence.
D．Temperature of 99.2°F(37.3℃).
参考答案：C
解析：
Urinary retention or incontinence may indicate cauda equina syndrome, which requires immediate surgery. An increase in pain on the second postoperative day is common because the long-acting local anesthetic, which may have been injected during surgery, will wear off. While paresthesia is common after surgery, progressive weakness or paralysis may indicate spinal nerve compression. A mild fever is also common after surgery but is considered significant only if it reaches 101°F(38.3℃).