From: Continuous noninvasive hemoglobin monitoring estimates timing for detecting anemia better than clinicians: a randomized controlled trial
SpHb monitoring group
Standard care group
p
PPV of a decrease in CoOxHb > 1 g/dl
93.3%
54.5%
0.002
PPV of CoOxHb falling to 10 g/dl
86.7%
50.0%
0.015
CoOxHb < 7 g/dl, n
0
1