如果SpO2的波型是穩定，可判讀的情況下，使用皮下血氧濃度監測儀(pulse oximeter)優於動脈血氧分析(Arterial Blood Gas, ABG)。原因如下：
1、 Saturation is a more direct measurement of tissue oxygen delivery than PaO2.
2、 ABG is a painful and expensive test.
3、One ABG typically leads to a cascade of ABGs, multiplying costs and blood loss.
4、ABGs may be contaminated with venous blood.
5、Point-of-care ABG monitors calculate oxygen saturation, rather than measuring it directly.
6、Obtaining an ABG may delay management.
7、PaO2 values are easily misunderstood.
8、Measuring the A-a gradient is over-utilized and potentially misleading.
9、ABG only measures oxygenation at a single time point.
10、Changes in PaO2 are widely misinterpreted.
#SpO2
#PaO2
#PulseOximeter
#ArterialBloodGas
#ABG
10 reasons oximetry beats ABG for testing oxygenation -by @PulmCrit
http://emcrit.org/pulmcrit/pulse-oximetry/
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