The Role of Fetal Ductus Arteriosus in Predicting Spontaneous Labour at Term
Primary Purpose
Ductus Arteriosus
Status
Withdrawn
Phase
Not Applicable
Locations
Study Type
Interventional
Intervention
Ultrasound examination
Sponsored by
About this trial
This is an interventional diagnostic trial for Ductus Arteriosus
Eligibility Criteria
Inclusion criteria:
- Low risk singleton pregnancy at 40 weeks gestation.
Exclusion criteria:
- Smoking
- Underlying cardiac or respiratory illness
- Fetal growth restriction
- Medicated gestational hypertension or evolving preeclampsia
- Gestational diabetes controlled with insulin or oral medications
- Use of steroids for lung maturation in the current pregnancy
- Known major congenital anomalies.
Sites / Locations
Arms of the Study
Arm 1
Arm Type
Other
Arm Label
Ultrasound examination
Arm Description
Participants will undergo an ultrasound examination at 40 weeks gestation to assess the fetal ductus arteriosis.
Outcomes
Primary Outcome Measures
Fetal ductus arteriosus changes
To prospectively assess whether any changes in blood flow in the fetal ductus arteriosus exist at 40 weeks' gestation.
Secondary Outcome Measures
Time to delivery
To investigate whether there is an association between the ductus arteriosus blood flow and the time to delivery interval at 40 weeks' gestation.
Full Information
1. Study Identification
Unique Protocol Identification Number
NCT03073460
Brief Title
The Role of Fetal Ductus Arteriosus in Predicting Spontaneous Labour at Term
Official Title
The Role of Fetal Ductus Arteriosus in Predicting Spontaneous Labour at Term
Study Type
Interventional
2. Study Status
Record Verification Date
April 2020
Overall Recruitment Status
Withdrawn
Why Stopped
Not able to recruit any participants
Study Start Date
June 2, 2016 (Anticipated)
Primary Completion Date
March 28, 2020 (Actual)
Study Completion Date
March 28, 2020 (Actual)
3. Sponsor/Collaborators
Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Unity Health Toronto
4. Oversight
Studies a U.S. FDA-regulated Drug Product
No
Studies a U.S. FDA-regulated Device Product
No
Data Monitoring Committee
No
5. Study Description
Brief Summary
The exact mechanism stimulating the parturition in humans is still relatively unknown. Prostaglandins, by mediating cervical ripening and early stimulation of myometrial contractions, are likely to play a major role in the parturition process. Much of the unique fetal circulation is facilitated by the ductus arteriosus. Patency of the ductus arteriosus in utero is primarily maintained via prostaglandins which are highly expressed by smooth muscle cells located in the media of the ductus arteriosus. The aim of the study is to prospectively observe fetal ultrasound changes related to the ductus arteriosus. The primary objective is to prospectively assess, whether any changes in the fetal ductus arteriosus parameters exist at 40 weeks' gestation. The secondary objective is to investigate whether there is an association between the ductus arteriosus parameters and the time to delivery interval at 40 weeks' gestation.
Detailed Description
The rationale is to assess whether physiological responses that occur around the time of delivery, in both the mother and the fetus (elevated prostaglandins level), can be quantified using ultrasound of the fetal ductus arteriosus.
Whether or not the DA plays an active physiological role in the initiation of parturition is still unknown. Since prostaglandins are physiologically highly expressed within the fetal ductus arteriosus and also linked to some critical steps throughout parturition, it is hypothesized that structural and doppler flow pattern variations of the ductus arteriosus exist in the period surrounding the birth. These changes might occur before or after the intrinsic rise of prostaglandins and could be quantified using prenatal ultrasound of the fetal DA.
Identifying new physiological based variables that can assist in predicting the onset of labour, as the one suggested in the current study, is thus of great importance and may provide invaluable information into the overall future care and decision making during pregnancy, especially around the time of delivery. It may assist in creating future recommendations for pregnant women and improved healthcare standards during the delivery process.
6. Conditions and Keywords
Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Ductus Arteriosus
7. Study Design
Primary Purpose
Diagnostic
Study Phase
Not Applicable
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
N/A
Enrollment
0 (Actual)
8. Arms, Groups, and Interventions
Arm Title
Ultrasound examination
Arm Type
Other
Arm Description
Participants will undergo an ultrasound examination at 40 weeks gestation to assess the fetal ductus arteriosis.
Intervention Type
Other
Intervention Name(s)
Ultrasound examination
Intervention Description
This exam is performed at 40 weeks gestation
Primary Outcome Measure Information:
Title
Fetal ductus arteriosus changes
Description
To prospectively assess whether any changes in blood flow in the fetal ductus arteriosus exist at 40 weeks' gestation.
Time Frame
40 weeks gestation
Secondary Outcome Measure Information:
Title
Time to delivery
Description
To investigate whether there is an association between the ductus arteriosus blood flow and the time to delivery interval at 40 weeks' gestation.
Time Frame
From 40 weeks gestation to delivery
10. Eligibility
Sex
Female
Gender Based
Yes
Gender Eligibility Description
Women with a singleton pregnancy
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion criteria:
Low risk singleton pregnancy at 40 weeks gestation.
Exclusion criteria:
Smoking
Underlying cardiac or respiratory illness
Fetal growth restriction
Medicated gestational hypertension or evolving preeclampsia
Gestational diabetes controlled with insulin or oral medications
Use of steroids for lung maturation in the current pregnancy
Known major congenital anomalies.
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Howard Berger, MD
Organizational Affiliation
Unity Health Toronto
Official's Role
Principal Investigator
12. IPD Sharing Statement
Plan to Share IPD
No
Learn more about this trial
The Role of Fetal Ductus Arteriosus in Predicting Spontaneous Labour at Term
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