*Qualitative interview from Obstetrician not obtained for this birth
O = observation, W = woman, D = Obstetrician, M = Midwife
AD = accidental deflation, IBP = ineffective bulb pump, SST =
significant sleeve tear
Bold italic steps = key stages in the study that
impacted on technique
Table 2 Original components of
application of the Odon Device for an assisted vaginal birth