问题
单项选择题
The nurse is preparing to administer a unit of blood to a client who is anemic. After its removal from the refrigerator, the blood should be administered within
A．1 hour.
B．2 hours.
C．4 hours.
D．6 hours.
答案
参考答案：C
解析：After the blood is removed from the refrigerator, it must be administered within 4 hours. Refrigeration delays the growth of bacteria in the blood. Options A and B are incorrect because the client could experience fluid overload if the blood is administered too rapidly. Option D is incorrect because of the extended time out of refrigeration and risk of contamination and growth of bacteria.