Aim: The objective of this study was to evaluate the risk factors
for operative vaginal delivery and to propose a new nomogram
for predicting the risk. Methods: We retrospectively
analyzed the data of 1,955 pregnancies that occurred in
our clinic between the years 2007 and 2008. Included were
singleton pregnancies with labor diagnosis after the 36th
gestational week in which spontaneous or operative vaginal
deliveries occurred. In this study, the operative delivery was
carried out exclusively by vacuum extraction. Results: After
univariate analysis and multivariate logistic regression stepwise
model selection, maternal age, nulliparity, medically assisted
procreation, gestational age at birth, male fetus, epidural
analgesia and medical induction of labor were found
to be the most predictive variables for operative vaginal delivery.
Considering these factors we propose a new nomogram
for an objectified determination of the risk of operative
vaginal delivery. Conclusions: The new nomogram we propose
could be an important tool for an objectified determination
of the risk of operative vaginal delivery by vacuum
extraction in individualized patient counseling