Case study No | Successful (S) and unsuccessful (U) AVB with Odon and mode of birth | Observation | Women | Interviews Operator | Midwife | Device issues |
1 | U—forceps | O1 | W1 | D1 | M1 | |
2 | U—forceps | D2 | M2 | |||
Fundal pressure during device application tried | ||||||
3 | S—Odon | D2 | M2 M3 | |||
Deflation of the air cuff when only part of the blue line was seen introduced | ||||||
4 | S—Odon | D2 | M4 | |||
5 | U—forceps | D1 | M2 | |||
6 | S—Odon | D2* | ||||
7 | U—forceps | O2 | W2 | D1 | M5 | AD |
Accidental pressing of the deflation button first noted | ||||||
Altered the angle of device insertion | ||||||
Application during a maternal contraction introduced, use of fundal pressure removed | ||||||
8 | S—Odon | O3 | W3 | D2 | M6 | AD |
Opened the sleeve handles during descent to monitor progression of fetal head first noted | ||||||
9 | U—forceps | O4 | W4 | D1 | ||
10 | S—Odon | D2 | M7 | |||
11 | S—Odon | O5 | W5 | D1 | M8 | AD |
12 | S—Odon | O6 | W6 | D1 | M9 | AD |
13 | S—Odon | O7 | W7 | D3 | M2 | |
14 | U—failed rotational forceps, emergency caesarean section | D1 | M7 | AD | ||
15 | U—forceps | D2 | M4 | |||
16 | U—forceps | O8 | W8 | D2 | M10 | IBP |
17 | S—Odon | D1 | ||||
18 | S—Odon | D3 | M11 | |||
19 | S—Odon | D4 | SST | |||
20 | U—rotational forceps | D4 | IBP | |||
21 | U—emergency caesarean section | D3 | M6 | |||
22 | U—forceps | D4 | ||||
23 | U—forceps | D1 | M6 | IBP | ||
24 | S—Odon | D1 | ||||
25 | U—forceps | D4 | ||||
26 | U—forceps | D4 | ||||
27 | S—Odon | D1 | AD | |||
28 | U—forceps | D1 | ||||
29 | S—Odon | D5 | ||||
30 | U—forceps | D1 | ||||
31 | U—forceps | D4 | IBP | |||
32 | U—forceps | D1 | ||||
33 | S—Odon | D5 | ||||
34 | S—Odon | D2 | ||||
35 | S—Odon | D2 | ||||
36 | U—forceps | D4 | ||||
Odon Summit held | ||||||
37 | U—forceps | D1 | ||||
38 | S—Odon | D4 | ||||
39 | S—Odon | D4 | M6 | |||
40 | U—forceps | D3 |
Bold italic steps denote key stages in the study that impacted on technique.
*Qualitative interview from obstetrician not obtained for this birth.
AD, accidental deflation; AVB, assisted vaginal birth; D, obstetrician; IBP, ineffective bulb pump; M, midwife; O, observation; SST, significant sleeve tear; W, woman.