Abstract
Objective. To determine whether Kiellands forceps rotational delivery causes a significant reduction in fetal pH or base excess, as compared to a control group delivered using non-rotational forceps.
Design. A prospective observational study. Setting. A teaching hospital labor ward in the UK.
Methods. Fetal blood sampling was performed prior to delivery by Kiellands forceps (n=26) or by non-rotational forceps (n=24). Following delivery, the umbilical vein was sampled. Outcome measures. The changes in fetal pH and base excess.
Results. No significant changes in pH were noted in fetuses delivered using Kiellands forceps or in those delivered using Neville Barnes forceps. However, whilst no changes in base-excess were found in the fetuses delivered using Neville Barnes forceps, there were significant changes in base-excess in those fetuses delivered using Kiellands forceps.
Conclusion. This small study suggests that delivery by Kiellands forceps may result in a significant deterioration in fetal acid-base balance.