Table 4.
Intervention characteristics and improvement of FHR tracing to Category I
| Any intervention (N = 2,251) | Oxygen (N = 1,698) | IVF bolus (N = 659) | Amnioinfusion (N = 240) | Tocolytic (N = 45) | |
|---|---|---|---|---|---|
| Improvement to Category I at any point within 60 minutes | 1,433 (63.7) | 1,105 (65.1) | 442 (67.1) | 125 (52.1) | 27 (60) |
| Improvement to Category I between 30 and 60 minutes | 1,136 (50.5) | 872 (51.4) | 357 (54.2) | 105 (43.8) | 22 (49) |
| Cesarean delivery decision within 60 minutes* | 77 (3.4) | 51 (3.0) | 26 (4.0) | 11 (4.6) | 7 (16) |
| Operative vaginal delivery within 60 minutes† | 92 (4.1) | 78 (4.6) | 29 (4.4) | 3 (1.3) | 1 (2) |
| First Stage Only | (N = 2,012) | (N = 1,496) | (N = 602) | (N = 237) | (N = 42) |
| Improvement to Category I at any point within 60 minutes | 1,362 (67.7) | 1,046 (69.9) | 425 (70.6) | 125 (52.7) | 25 (60) |
| Improvement to Category I between 30 and 60 minutes | 1,090 (54.2) | 835 (55.8) | 344 (57.1) | 105 (44.3) | 21 (50) |
| Cesarean delivery decision within 60 minutes* | 67 (3.3) | 45 (3.0) | 19 (3.2) | 11 (4.6) | 7 (17) |
| Operative vaginal delivery within 60 minutes† | 24 (1.2) | 19 (1.3) | 12 (2.0) | 2 (0.8) | 1 (2) |
| Second Stage Only | (N = 239) | (N = 202) | (N = 57) | (N = 3) | (N = 3) |
| Improvement to Category I at any point within 60 minutes | 71 (29.7) | 59 (29.2) | 17 (30) | 0 (0) | 2 (67) |
| Improvement to Category I between 30 and 60 minutes | 46 (19.3) | 37 (18.3) | 13 (23) | 0 (0) | 1 (33) |
| Cesarean delivery decision within 60 minutes* | 10 (4.2) | 6 (3.0) | 7 (12) | 0 (0) | 0 (0) |
| Operative vaginal delivery within 60 minutes† | 68 (28.5) | 59 (29.2) | 17 (30) | 1 (33) | 0 (0) |
IVF = intravenous fluid
Data are n (%)
*
Decision for cesarean delivery for non-reassuring fetal status made within 60 minutes of the intervention.
†
Vacuum- or forceps- assisted delivery for non-reassuring fetal status within 60 minutes of the intervention.