Deflating the air cuff
The original IFU stated that ‘once you see the blue deflation line completely’ the air cuff should be deflated. By the third attempted birth it became apparent to the observer that this was too late and actually, the optimum time for air cuff deflation seemed to be when any section of the blue line could be seen:
O5: ‘Noticed that it was not the anterior blue deflation line that the operator was looking at the deflate but the posterior deflation line, due to the fact that there is an acute J curve and anterior line not seen. Will need to change this in training.’
This was rapidly disseminated and adopted by all operators.