Comparison between early versus delayed breaking of the waterbag (amniotic sac) in terms of labour duration in childbirth
| ISRCTN | ISRCTN59705367 |
|---|---|
| DOI | https://doi.org/10.1186/ISRCTN59705367 |
| ClinicalTrials.gov (NCT) | Nil known |
| Clinical Trials Information System (CTIS) | Nil known |
| Protocol serial number | NMRR-20-1797-55559 |
| Sponsor | University Malaya Medical Centre |
| Funder | University Malaya Medical Centre |
- Submission date
- 20/09/2020
- Registration date
- 22/09/2020
- Last edited
- 29/01/2021
- Recruitment status
- No longer recruiting
- Overall study status
- Completed
- Condition category
- Pregnancy and Childbirth
Plain English summary of protocol
Background and study aims
Labour induction — also known as inducing labour — is the stimulation of uterine contractions during pregnancy before labour begins on its own to achieve a vaginal birth. A health care provider might recommend labour induction for various reasons, primarily when there's a concern for a mother's health or a baby's health. One of the most important factors in predicting the likelihood of successful labour induction is how soft and distended the opening of the womb (cervix) is.
The frequency of induction of labour has dramatically risen over the last decades. Mechanical induction using an inflatable balloon on a tube placed into the cervix (Foley catheter) is a common induction method. Typically, patients who are induced with a Foley catheter will not have a contraction on their own, therefore the usage of the drug 'oxytocin' combined with artificial rupture of the amniotic sac (waterbag that surrounds the baby) is usually needed to initiate labour. (Oxytocin is a drug that can make contractions stronger and more regular and can start to work quite quickly).
The aim of this study is to investigate the hypothesis that early artificial opening of the amniotic sac (amniotomy) and immediate oxytocin will shorten labour duration.
Who can participate?
Women who have not previously given birth (nulliparous) who are over 37 weeks pregnant and planned for induction with a Foley catheter.
What does the study involve?
Participants will be randomly allocated to receive immediate amniotomy and administration of oxytocin or will receive oxytocin and amniotomy after 4 hours, or earlier if warranted. After the delivery, participants will be asked to provide their level of satisfaction with the delivery.
What are the possible benefits and risks of participating?
Benefits: The procedure may shorten the birth process and improve satisfaction in the birth process. Information obtained from this study will help to improve the management of labour in the future.
Risks: Amniotomy can cause some pain and discomfort. Oxytocin can cause changes in fetal heart monitoring. Major complications are not anticipated.
Where is the study run from?
University Malaya Medical Centre (Malaysia)
When is the study starting and how long is it expected to run for?
April 2020 to March 2021 (updated 29/01/2021, previously: January 2021)
Who is funding the study?
University Malaya Medical Centre (Malaysia)
Who is the main contact?
Nur Adlyn Binti Hasan
adlynhasan@gmail.com.my
Contact information
Public
Kompleks Wanita dan Kanak-Kanak
University Malaya Medical Centre
Kuala Lumpur
50603
Malaysia
| Phone | +60 (0)3 7949 4422 |
|---|---|
| adlyn@ummc.edu.my |
Study information
| Primary study design | Interventional |
|---|---|
| Study design | Single- center interventional randomized controlled trial |
| Secondary study design | Randomised controlled trial |
| Study type | Participant information sheet |
| Scientific title | Immediate oxytocin and early amniotomy versus immediate oxytocin and delayed amniotomy following cervical ripening with foley catheter in nulliparous women |
| Study objectives | Nulliparous receiving titrated oxytocin infusion after Foley ripening for labour induction, concurrent amniotomy (with the start of oxytocin infusion) compared to delayed amniotomy will shorten the interval to delivery. |
| Ethics approval(s) | Approved 12/09/2020, Medical Research Ethics Committee, University Malaya Medical Centre (Lembah Pantai, 59100 Kuala Lumpur, Malaysia; +60 379493209; ummc@ummc.edu.my), ref: 2020623-8808 |
| Health condition(s) or problem(s) studied | induction of labour in nulliparous pregnant women |
| Intervention | All nulliparous women having Foley catheter insertion are recruited in our delivery suite and antenatal ward. Eligible women will be provided with a patient information sheet and written consent will be taken. After the removal of the Foley catheter or spontaneous expulsion of the catheter, the vaginal examination will be performed, and those women with cervical dilatation of ≥3cm will be randomized to either early amniotomy and oxytocin group or oxytocin and delayed amniotomy group. The randomisation will be carried out by sealed envelope. Women who in the early amniotomy group will have amniotomy done followed by IV oxytocin administration. Women in the delayed amniotomy group will receive IV oxytocin and planned amniotomy after 4 hours, or earlier if warranted. All the primary and secondary outcomes are collected after delivery. |
| Intervention type | Mixed |
| Primary outcome measure(s) |
Intervention to delivery interval measured as the time (min) from oxytocin initiation to delivery of the baby |
| Key secondary outcome measure(s) |
Maternal outcome: |
| Completion date | 31/03/2021 |
Eligibility
| Participant type(s) | Patient |
|---|---|
| Age group | Adult |
| Lower age limit | 18 Years |
| Sex | Female |
| Target sample size at registration | 140 |
| Key inclusion criteria | 1. Female aged 18 years and above 2. Nulliparous 3. Gestational age of ≥37 weeks at enrolment Scheduled induction of labour (Gestational age estimations supported by ultrasonographic dating) 4. Planned labour induction 5. Singleton pregnancy 6. Cephalic presentation 7. Women who had a cervical ripening with Foley catheter only and favourable cervix with cervical dilatation of 3 cm or greater (suitable for amniotomy) with contraction every 1 to 5 min 8. Intact membranes 9. Reassuring cardiotocogram |
| Key exclusion criteria | 1. Previous uterine incision/ injury (caesarean delivery, myomectomy, perforation) 2. Gross fetal anomaly 3. Contraindication for vaginal birth 4. Fetal weight clinically estimated to be ≤2 kg or ≥4kg before induction and confirmed by ultrasound 5. Ruptured membranes |
| Date of first enrolment | 25/09/2020 |
| Date of final enrolment | 31/03/2021 |
Locations
Countries of recruitment
- Malaysia
Study participating centre
Kuala Lumpur
50603
Malaysia
Results and Publications
| Individual participant data (IPD) Intention to share | Yes |
|---|---|
| IPD sharing plan summary | Available on request |
| IPD sharing plan | The datasets generated and/or analysed during the current study will available upon request from the principal investigator (Nur Adlyn Hasan; adlyn@ummc.edu.my) after the overall trial end date. Datasets are confidential and any data sharing will have to go through the Medical Research Ethics Committees at University Malaya Medical Centre. |
Study outputs
| Output type | Details | Date created | Date added | Peer reviewed? | Patient-facing? |
|---|---|---|---|---|---|
| Participant information sheet | Participant information sheet | 11/11/2025 | 11/11/2025 | No | Yes |
Editorial Notes
29/01/2021: The following changes were made to the trial record:
1. The recruitment end date was changed from 31/01/2021 to 31/03/2021.
2. The overall end date was changed from 31/01/2021 to 31/03/2021.
3. The intention to publish date was changed from 31/01/2022 to 31/03/2022.
4. The plain English summary was updated to reflect these changes.
05/10/2020: The recruitment start date was changed from 01/10/2020 to 25/09/2020.
21/09/2020: Trial’s existence confirmed by University of Malaya Medical Centre
