- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03948932
Cervix Uteri "Resistance" Measurements
Cervical "Resistance" Measurements - a Novel Method for Evaluation of Cervical "Ripeness" Prior to Labor Induction
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The investigators routinely use the Cook balloon catheter 13 for mechanical induction of labor 10-11 - this is a medical grade, double balloon catheter, comprised of a slender, flexible tube open at one end and closed at the opposite end; an inflatable distal balloon fixed to the tube at its closed end and designed to be inflated in the uterus; an inflatable proximal balloon located slightly below the uterine balloon (labeled as the cervical balloon).
The catheter will be inserted according to the manufacturer's instructions with the patient in a lithotomy position under visualization of the cervix. When both balloons are inserted, the uterine balloon will be inflated through valve V1; using 40 ml of sterile saline solution. With a slight downward pull on the catheter, the cervical balloon will be located inside the cervix. In order to measure the cervical resistance, the investigators will connect a sensitive, passive pressure gauge to the cervical inflated balloon with the use of a by a bi-directional valve. At this point the investigators will gradually inflate the cervical balloon via valve V2 with 80 ml of sterile saline solution. The cervical resistance will be measured and documented every 10 ml. Finally, the uterine balloon will be further inflated with additional saline to a volume of 40 ml. (as per our standard mechanical induction protocol). The investigators believe that this system provides an objective and quantifiable evaluation of the pressure exerted on the cervical balloon as it is gradually inflated. As the cervical stiffness ("resistance") increases the pressure within the cervical balloon will be higher with a given volume of fluid within it. Therefore, the investigators define cervical resistance as the pressure vs. volume curve within the cervical balloon.
A group of 100 patients, (50 multiparas & 50 nulliparas) with an obstetrical or medical indication for induction of labor will be recruited and consented for participation in this study. A transvaginal ultrasound will be performed prior to the initiation of the procedure to exclude placenta previa and to confirm a vertex presentation. Cervical length and angle will be recorded. All women will undergo a pelvic examination in order to obtain an initial Bishop Score.
Study Type
Enrollment (Anticipated)
Contacts and Locations
Study Locations
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-
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Haifa, Israel
- Recruiting
- Rambam Health Care Campus
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Obstetrical or medical indication for induction of labor
- Unfavorable cervix
- Gestational age between 24 - 42 weeks
- Singleton pregnancy
Exclusion Criteria:
- Any contraindication for vaginal delivery
- Rupture of membranes
- Fetal malformations incompatible with life
- Amnionitis
- Genital viral infection (HIV, HCV, HBV)
Study Plan
How is the study designed?
Design Details
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Volume versus pressure
Time Frame: From patient admission up to 24 hours postpartum.
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To define pressure versus volume characteristics of the expanding uterine cervical balloon.
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From patient admission up to 24 hours postpartum.
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Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (ACTUAL)
Primary Completion (ANTICIPATED)
Study Completion (ANTICIPATED)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (ACTUAL)
Study Record Updates
Last Update Posted (ACTUAL)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Other Study ID Numbers
- 0246-16-RMB
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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