Table 3 Time (in min) to reach specified SpO2 levels after birth.
| Study | Gestation (weeks) | Type of oximeter | Sensor location | n | Resuscitation | SpO2 | Comments | |||
|---|---|---|---|---|---|---|---|---|---|---|
| >75% | >80% | >90% | 95% | |||||||
| Toth et al22 | ⩾35 | Nellcor N‐3000 | Preductal | 50 | No infant received oxygen | NA | NA | NA | 12 (2–55)* | 48 spontaneous deliveries, 2 vacuum extraction |
| Postductal | 50 | 14 (3–55)* | ||||||||
| Kamlin et al18 | ⩾31 | Masimo Radical | Preductal | 175 | No infant received oxygen | NA | NA | 5.8 (3.2)† Range 1.3–20.2 | NA | 51 preterm |
| 124 term infants | ||||||||||
| Kopotic and Lindner25 | < 30 | Masimo Radical | Preductal | 15 | Infants initially received 100% oxygen then oxygen adjusted according to SpO2 measurements | NA | 4.4 (1.9–40)‡ | NA | NA | |
| Vento et al31 | > 37 | Not reported | Not reported | 22 | Control group | NA | NA | 0.9 (0.4)† | NA | Non‐asphyxiated |
| 55 | Air | 2.0 (0.7)† | Infants with asphyxia | |||||||
| 52 | 100% oxygen | 1.8 (0.9)† | ||||||||
| Rao and Ramji16 | ⩾31 | Novametrix 515A | Preductal | 95 | Infants with asphyxia randomised to receive air or 100% oxygen during resuscitation | 5 (3–7.25)§ | NA | 7.3 (4.5–11)§ | NA | Infants with asphyxia enrolled in the Resair 2 study |
| 30 | Not reported | 2.8 (1.6–4.4)§ | NA | 4.3 (2.9–5.8)§ | NA | Non‐asphyxiated control group | ||||
| Saugstad et al32 | ⩾31 | Not reported | Not reported | 103 | Air | 1.5 (1.4–1.6)§ | NA | NA | NA | Infants with asphyxia enrolled in the Resair 2 study |
| 109 | 100% oxygen | 2.5 (1.9–3.1)§ | ||||||||
NA, not applicable, SpO2, saturation by pulse oximetry.
*Mean (range); †mean (SD); ‡median (range); §median (95% CI).