Trial of Magnesium Sulfate Tocolysis Versus Nifedipine Tocolysis in Women With Preterm Labor

November 6, 2009 updated by: University of Cincinnati

Randomized Double-Blinded Trial of Magnesium Sulfate Tocolysis Versus Nifedipine Tocolysis in Women With Preterm Labor Between 24 to 32 6/7 Weeks' Gestation

Primary Hypothesis:

Acute tocolysis (48 hours) using oral nifedipine is more effective than intravenous magnesium sulfate in prolonging pregnancy in women with preterm labor with intact membranes between 24 and 32 6/7 weeks' gestation.

Study Overview

Status

Terminated

Conditions

Intervention / Treatment

Detailed Description

Primary Objective:

To compare the efficacy of oral nifedipine versus IV magnesium sulfate on the rate of preterm delivery at <37 weeks in women with preterm labor between 24 and 32 6/7 weeks gestation.

Secondary Objective:

  1. To compare maternal side effects between the two tocolytic agents
  2. To compare neonatal morbidities between the two study groups.

Study Type

Interventional

Enrollment (Actual)

33

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Ohio
      • Cincinnati, Ohio, United States, 45219
        • University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

15 years to 50 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  • Women in preterm labor between 24 to 32 6/7 weeks' gestation with intact membranes with an age range of 15 to 50 years old.

Exclusion Criteria:

  • Cervical dilatation of ≥ 6 cm
  • Maternal contraindication to tocolysis
  • Known fetal anomalies
  • Suspected chorioamnionitis
  • Nonreassuring fetal heart tracing
  • Vaginal bleeding due to placenta previa or abruptio placenta
  • Preterm premature rupture of membranes
  • Prolapsed membranes
  • Human immunodeficiency virus positive
  • Multiple gestation
  • Patients on procardia within 24 hours of po intake
  • Magnesium sulfate tocolysis prior to randomization
  • Patient refusal

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Active Comparator: 1
Intravenous magnesium sulfate or placebo
Drug: Magnesium sulfate
Intravenous magnesium sulfate 6g bolus, then increased by 1 g/hour till a maximum of 5g/hour; gradually wean down to 2 g/hour for a total of 48 hours once uterine contractions is < 6/hour.
Active Comparator: 2
Oral nifedipine or placebo
Drug: Oral Nifedipine or placebo
Oral nifedipine or placebo at 20 mg every 30 minutes for the first hour, then 20 mg every 3 to 6 hours not to exceed 180 mg in 24 hours, keep maintenance dose at 20 mg every 3 to 6 hours for a total of 48 hours if uterine contractions is < 6/hour.
Other Names:
  • Oral procardia

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Delivery <37 weeks' gestation, Delivery <34 weeks' gestation, Delivery <32 weeks' gestation
Time Frame: 4 years
4 years

Secondary Outcome Measures

Outcome Measure
Time Frame
Maternal complications associated with each drugs. Neonatal morbidities associated with prematurity
Time Frame: 4 years and 9 months
4 years and 9 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Cincinnati

Collaborators

University Hospital

Investigators

  • Principal Investigator: Baha Sibai, MD, University of Cincinnati

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2006

Primary Completion (Actual)

October 1, 2009

Study Completion (Actual)

October 1, 2009

Study Registration Dates

First Submitted

March 21, 2006

First Submitted That Met QC Criteria

March 21, 2006

First Posted (Estimate)

March 23, 2006

Study Record Updates

Last Update Posted (Estimate)

November 9, 2009

Last Update Submitted That Met QC Criteria

November 6, 2009

Last Verified

November 1, 2009

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 05-12-27-01

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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