问题
单项选择题
Which of the following laboratory tests should be monitored closely by the nurse while the client is receiving heparin therapy()
A. International normalized ratio (INR).
B. Activated partial thromboplastin time (APTT).
C. Prothrombin time (PT).
D. Thrombin time.
答案
参考答案：B
解析：
Activated partial thromboplastin time (APTT) is used to measure the clotting status when the client is receiving heparin.
