单选题
The nurse is preparing to give a 9-year-old client a preoperative IM injection. Which size needle should the nurse use?
A. 22G,
.
B. 22G, 1".
C. 20G,
A. 22G,
.B. 22G, 1".
C. 20G,
【正确答案】
B
【答案解析】The nurse should first evaluate the muscle mass and amount of subcutaneous fat and then select the correct size needle. Without more information, the nurse would select the 22G, 1" needle, appropriate for an average-sized school-age child. The 20G, 1" needle would be unnecessarily large. The 22G, 
needle would be too long. The 20G, 
needle would be too long. The 20G,