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Measuring postpartum uterine contractions during the third stage of labour: a pilot study, using a novel minimally invasive technique

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DOI: 10.4236/ojog.2011.13023    3,979 Downloads   7,082 Views  

ABSTRACT

Objectives: To determine the feasibility of measuring intra-uterine pressure prior to placental delivery, using a novel minimally invasive method. Design: A prospective exploratory physiological study. Methods: Thirty-six low risk women undergoing normal vaginal delivery were randomly allocated to four groups. Group A received 600 mcg rectal misoprostol; group B received 600 mcg oral misoprostol; group C received 10 international units oxytocin intramuscularly after delivery of the anterior shoulder; group D received intramuscular oxytocin, 30 minutes after delivery of the baby. A calibrated catheter-tip intrauterine pressure transducer was used to measure the intrauterine pressure. This was introduced into the placenta via the umbilical vein, and recorded on a standard tocograph. Results: It was technically easy to introduce the catheter through the umbilical vessels in all mothers. On assessment of the tocograms, it was possible to interpret 95 out of 108 recordings (88%). Conclusions: This study demonstrated the simplicity of a novel, minimally invasive method of measuring the duration and frequency of postpartum uterine contractions prior to delivery of the placenta.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Akin, B. , Justus, H. and Cheryl, N. (2011) Measuring postpartum uterine contractions during the third stage of labour: a pilot study, using a novel minimally invasive technique. Open Journal of Obstetrics and Gynecology, 1, 128-130. doi: 10.4236/ojog.2011.13023.

References

[1] Chong, Y.S., Chua, S., El-Refaey, H., Choo, W.L., Chanrachakul, B., Tai, B.C., Rodeck, C. and Arulkumaran, S. (2001) Postpartum intrauterine pressure studies of the uterotonic effect of oral misoprostol and intramuscular syntometrine. An International Journal of Obstetrics and Gynaecology, 108, 41-47.
[2] Choo, W.L., Chua, S., Chong, Y.S., Vanaja, K., Oei, P.L., Ho, L.M., Roy, A.C. and Arulkumaran, S. (1998) Correlation of change in uterine activity to blood loss in the third stage of labour. Gynecology and Obstetrics Investigation, 46, 178-180. doi:10.1159/000010028

  
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