Think about the following example of a summative (AoP) OSATS encounter.
You observe a ST4 trainee performing a direct OA ventouse delivery for slow progress in the second stage.
You have checked the examination findings and:
- the vertex is at +2 station
- minimal caput
- no moulding.
The trainee makes an appropriate clinical assessment and the correct decision regarding mode of delivery. They ensure the bladder is empty and apply the cup safely. The baby is delivered after three pulls.
- the first two pulls are smooth but slightly upward on the ventouse before the vertex has passed the pubic arch for the first two pulls
- the third pull is correct
- the cup placement on the baby’s head is slightly left of centre on the vertex
- the trainee has not checked their cup application on the baby’s head after suturing the perineum.
In a discussion after, the trainee mentions that they were unaware that the first two pulls were not correct, and the third pull was corrected by chance.