Up-Down Oxytocin Infusion

November 1, 2011 updated by: Ronald George, IWK Health Centre

Up-down Determination of the ED90 of Oxytocin Infusions for the Prevention of Postpartum Uterine Atony in Parturients Undergoing Cesarean Delivery

This study is designed to determine the minimum effective dose (ED90) of infusions of oxytocin for the prevention of uterine atony / postpartum hemorrhage and the need for additional uterotonics, in low risk parturients presenting for an elective CD.

The primary outcome measure is the response of effective uterine contraction as either satisfactory or unsatisfactory as determined by the obstetrician blinded to the oxytocin infusion dose. Secondary outcomes will include need for additional uterotonics, calculated intra-operative blood loss and presence of oxytocin related adverse effects.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

40

Phase

  • Phase 4

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

  • Canada
    • Nova Scotia
      • Halifax, Nova Scotia, Canada, B3K 6R8
        • IWK Health Centre

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

Female

Description

Inclusion Criteria:

  1. Non-emergent cesarean delivery with planned spinal anesthesia (i.e. elective planned cesarean delivery for malposition, patient choice, cervical pelvic disproportion, previous cesarean delivery and other diagnosis that require a predetermined cesarean delivery)
  2. American Society of Anesthesia physical status class I & II (ASA I - Healthy, ASA II - mild and controlled systemic disease, eg. controlled essential hypertension)
  3. Age ≥ 18 years
  4. Term gestational age (≥ 37 weeks)
  5. English-speaking

Exclusion Criteria:

  1. Morbid Obesity (Body Mass Index ≥ 45 kg/m2) (Morbidly obese parturients require a dose of local anesthetic less than the standardized dose in this study and the blood pressure cuff occasionally needs to be replaced by an intraarterial catheter due to limitations in size)
  2. Laboring women
  3. Urgent or emergency cesarean delivery
  4. Severe hypertensive disease of pregnancy defined as systolic blood pressure (SBP) > 160mmHg, diastolic blood pressure (DBP) > 110mmHg and/or requiring antihypertensive treatment or associated with significant proteinuria
  5. Severe maternal cardiac disease
  6. Subjects predisposed to uterine atony and postpartum hemorrhage (i.e. placenta previa, multiple gestation, macrosomia, polyhydramnios, uterine abnormalities, or bleeding diathesis, > 2 previous CD)
  7. Fetal anomalies /Intrauterine Fetal Demise
  8. Failed spinal anesthesia
  9. Patient enrollment in another study involving a study medication within 30 days of CD
  10. Any other physical or psychiatric condition which may impair their ability to cooperate with study data collection

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: Prevention
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: A
Drug: Oxytocin infusion
Up-down dosing determination

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
The primary outcome measure is the response of effective uterine contraction as either satisfactory or unsatisfactory as determined by the obstetrician blinded to the oxytocin infusion dose.
Time Frame: 3 minutes
3 minutes

Secondary Outcome Measures

Outcome Measure
Time Frame
Secondary outcomes will include need for additional uterotonics, calculated intra-operative blood loss and presence of oxytocin related adverse effects.
Time Frame: 2 days
2 days

Collaborators and Investigators

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

Sponsor

IWK Health Centre

Investigators

  • Principal Investigator: Ronald B George, MD FRCPC, IWK

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

June 1, 2008

Primary Completion (Actual)

August 1, 2008

Study Completion (Actual)

August 1, 2008

Study Registration Dates

First Submitted

October 27, 2008

First Submitted That Met QC Criteria

November 4, 2008

First Posted (Estimate)

November 5, 2008

Study Record Updates

Last Update Posted (Estimate)

November 2, 2011

Last Update Submitted That Met QC Criteria

November 1, 2011

Last Verified

November 1, 2008

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IWK-4329-2008

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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