Table 2

Summary of 40 cases investigating the Odon Device with adaptations made to device technique

Case study NoSuccessful (S) and unsuccessful (U) AVB with Odon and mode of birthObservationWomenInterviews OperatorMidwifeDevice issues
1U—forcepsO1W1D1M1
2U—forcepsD2M2
Fundal pressure during device application tried
3S—OdonD2M2
M3
Deflation of the air cuff when only part of the blue line was seen introduced
4S—OdonD2M4
5U—forcepsD1M2
6S—OdonD2*
7U—forcepsO2W2D1M5AD
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
8S—OdonO3W3D2M6AD
Opened the sleeve handles during descent to monitor progression of fetal head first noted
9U—forcepsO4W4D1
10S—OdonD2M7
11S—OdonO5W5D1M8AD
12S—OdonO6W6D1M9AD
13S—OdonO7W7D3M2
14U—failed rotational forceps, emergency caesarean sectionD1M7AD
15U—forcepsD2M4
16U—forcepsO8W8D2M10IBP
17S—OdonD1
18S—OdonD3M11
19S—OdonD4SST
20U—rotational forcepsD4IBP
21U—emergency caesarean sectionD3M6
22U—forcepsD4
23U—forcepsD1M6IBP
24S—OdonD1
25U—forcepsD4
26U—forcepsD4
27S—OdonD1AD
28U—forcepsD1
29S—OdonD5
30U—forcepsD1
31U—forcepsD4IBP
32U—forcepsD1
33S—OdonD5
34S—OdonD2
35S—OdonD2
36U—forcepsD4
Odon Summit held
37U—forcepsD1
38S—OdonD4
39S—OdonD4M6
40U—forcepsD3
  • 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.