Sir,
We welcome Gurol‐Urganci I and Bidwell et al’s evaluation of the impact
of the care bundle to reduce obstetric anal sphincter injury (OASI)
published in your August edition last year.[1] The article reports
much needed evidence on the efficacy of an intervention that has already
taken hold in many maternity services across the country.
Despite the article’s timely nature, we would like to voice our
disappointment in the quality of the evidence of support for the care
bundle Meulen and Thakar et al provide, and the recommendations made.
The article fails to consider important evidence in this area of
maternity care prompting this response. In particular, the authors miss
the opportunity to contextualise the relatively low-level evidence they
take from five articles – reporting three Scandinavian cohort studies
and one educational intervention study on manual assistance during the
final part of the second stage of labour (including gripping the baby’s
chin through the perineum) - with the compelling findings from the
Cochrane review on Perineal techniques during the second stage of
labour for reducing perineal trauma. [2] This omission is important
because the Cochrane review indicates that warm compresses have a bigger
positive effect on OASI than the OASI care bundle reported by Meulen and
Thakar et al’s. Furthermore, the Cochrane review provides evidence
suggesting that hands off the perineum may protect women from
episiotomy; an outcome which Meulen and Thakar et al acknowledge
remained unchanged despite the third component in the care bundle aiming
to ‘use of episiotomy when clinically indicated’. The selective nature
of the evidence quoted, undermines the credibility of inferences that
can be made from the findings. We suggest therefore, that caution should
be taken when reading the authors conclusions.
Our second concern rests upon the authors failure to account for the
surprisingly small positive effect of the care bundle compared with the
Scandinavian studies they quote. Meulen and Thakar et al report a 0.3%
decrease in OASI compared with a 3.6% reduction;[3]
3% reduction;[4] a 2.6% reduction for low risk women;[5] and a
2.1% reduction in the various observational studies [6] Such a
small effect in an open trial could easily be caused by ascertainment
bias. Again, the quality of the previous Scandinavian studies make
interpretation difficult but the marked difference in results between
Scandinavia and England suggests caution should be taken when reading
the authors conclusions.
Our final concern pertains to women’s experience of the care bundle. Not
only is the acceptability of the intervention not considered in this
evaluation – a significant oversight given the conspicuous lack of
evidence on this – there are ethical issues within the evaluation that
deserve attention. The intervention description in figure 1 claims that
women were informed about what could be done to reduce OASI. This does
not appear to be entirely true given the lack of consideration of warm
compresses and hands off to protect against episiotomy. Even more
unsettling is the statement ‘MPP should be used unless the woman
objects’, implying little consideration for autonomy and informed
consent.
For the above reasons, we are not only disappointed with the BJOG
article but with the professional stakeholder investment in the
intervention which seems to have been widely and uncritically supported,
with some support even being somewhat evangelical, despite the limited
evidence for support.
Signatures,