问题
单项选择题
A client has a perforated nasal septum. The nurse correctly judges the client to be a user of which of the following substances
A. Heroin.
B. Cocaine.
C. LS
D.D. Marijuan
答案
参考答案：B
解析：Nasal septal perforation is associated with cocaine uses. When the cocaine is inhaled into the nares, it causes vasoconstriction and impairs the blood supply to the septurn. With frequent repeated use, this leads to tissue necrosis.