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Non-linear imputation of arterial oxygen from peripheral saturations

Non-linear imputation of arterial oxygen from peripheral saturations
Measured SpO2 (%) Imputed PaO2 (mmHg)
100* 167*
99* 132*
98* 104*
97* 91*
96 82
95 76
94 71
93 67
92 64
91 61
90 59
89 57
88 55
87 53
86 51
85 50
84 49
83 47
82 46
81 45
80 44
79 43
78 42
77 42
76 41
75 40
74 39
73 39
72 38
71 37
70 37
* Generally considered unreliable on the basis of the sigmoidal shape of the hemoglobin-oxygen dissociation curve.
¶ Based on SpO2 99.5%.
From: Brown SM, Duggal A, Hou PC, et al. Nonlinear Imputation of PaO2/FIO2 From SpO2/FIO2 Among Mechanically Ventilated Patients in the ICU: A Prospective, Observational Study. Crit Care Med 2017; 45:1317. DOI: 10.1097/CCM.0000000000002514. Supplemental material available at http://links.lww.com/CCM/C658. Copyright © 2017 Society of Critical Care Medicine. Reproduced with permission from Wolters Kluwer Health. Unauthorized reproduction of this material is prohibited.
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