How safe is GP obstetrics? An assessment of antenatal risk factors and perinatal outcomes in one rural practice.

INTRODUCTION

Approximately one-fifth of Western Australian women deliver their babies in rural and remote regions of the state. The medical workforce caring for these women is predominantly non-specialist GP obstetricians. This article explores how safe is rural GP obstetrics. It reviews one rural obstetric practice in detail. In particular it asks these questions: What are the antenatal risk factors? What are the obstetric outcomes for the mother? What are the obstetric outcomes for the baby?

METHODS

This study is an audit of the author's obstetric practice over a two-year period from July 2007 to June 2009. The audit criteria included all obstetric patients managed by the author through to delivery and immediate post-partum care. Hospital and practice notes for 195 singleton pregnancies were reviewed. Antenatal risk factors, intrapartum events and immediate post-partum events for all patients cared for by the author through to delivery were recorded and compared with averages for Western Australia from published 2007 figures.

RESULTS

The maternal population had mean age of 28.5 years, 2.1% were Aboriginal. Body mass index (BMI) at booking was a mean of 27.1 (range 18-40). Those with a BMI > 40 were referred elsewhere. Significant antenatal risks included smoking (14.9%), previous caesarean section (14.4%), hypertension (13.3%), pre-eclampsia (5.1%) and gestational diabetes (8.2%). Intrapartum there were high rates of induction (33.5%), epidural/spinal (34.7%) and shoulder dystocia (3.6%). Type of delivery was predominantly spontaneous vaginal (65.6%), vacuum (14.9%), forceps (2.6%), elective caesarean (9.7%) and non-elective caesarean (8.7%). Post-partum events included post-partum haemorrhage (10.3%), transfusion (1.5%), retained placenta (2.1%), neonatal jaundice (21.1%), neonatal seizures (1.5%) neonatal sepsis (1.5%) and neonatal special care or intensive care (SCU/NICU) admission (9.8%).

CONCLUSIONS

The audit population was a group of relatively low risk pregnant women. Despite referral of more complicated patients to specialist services either in Kalgoorlie or to Perth, there remained a significant number of women who developed antenatal risk factors. There was a high rate of induction of labour, which reflected the high rates of hypertension and diabetes, both relative indicators for induction at term. There was a reassuringly high rate of spontaneous vaginal delivery and low rates of elective and non-elective caesarian section. Post-partum clinically significant events still occurred for mother and baby, although not at rates higher than expected elsewhere. The results of this audit show that in a rural setting where options for referral may be less than in an urban setting, it is still possible to practice obstetrics safely. These results support the hypothesis that it is safe to practice GP obstetrics particularly in a rural setting. An unexpected result in this audit was the high rate of gestational diabetes, which is significantly greater than the average published for Western Australia. Further investigation of rates of gestational diabetes in other rural populations is warranted to explore this further.