问题
单项选择题
The nurse is performing a painless, noninvasive procedure to measure arterial oxygen saturation (SaO2). What procedure is it
A. Incentive spirometry.
B. Arterial blood gas (ABG) measurement.
C. Peak flow measurement.
D. Pulse oximetry.
答案
参考答案：D
解析：Pulse oximetry is a noninvasive procedure in which a small sensor is positioned over a pulsating vascular bed. It can be used during transport and causes the client no discomfort. An incentive spirometer is used to assist the client with deep breathing after surgery. ABG measurement can measure SaO2, but this is an invasive procedure that can be painful. Some clients with asthma use peak flow meters to measure levels of expired air.