Ductus ArteriosusNCT03073460
The Role of Fetal Ductus Arteriosus in Predicting Spontaneous Labour at Term
A study testing Ultrasound examination in people with Ductus Arteriosus, run by Unity Health Toronto.
Trial 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. Read more about this study
- Who is it for?
- Any age, women only
- Conditions the study is for
- Ductus Arteriosus
- What is being tested?
- Ultrasound examination
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 0 participants
- Where
- No sites listed yet
- Study dates
- 2 Jun 2016to 28 Mar 2020
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- Women only
- No healthy volunteers
- Child, Adult, Older adult
Who may be able to join
- Low risk singleton pregnancy at 40 weeks gestation.
Who cannot join
- 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.
About this study
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.
Read the 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.
- Conditions
- Ductus Arteriosus
- Being tested
- Ultrasound examination
- Medical subject headings
- Ductus Arteriosus, Patent
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Ultrasound examinationOther
This exam is performed at 40 weeks gestation
| Study group | Role | What they receive |
|---|---|---|
| Ultrasound examination | Other | Participants will undergo an ultrasound examination at 40 weeks gestation to assess the fetal ductus arteriosis. Receives: Other: Ultrasound examination |
What is being measured
The primary outcome is the main question the study is designed to answer.
Fetal ductus arteriosus changes
To prospectively assess whether any changes in blood flow in the fetal ductus arteriosus exist at 40 weeks' gestation.
Measured: 40 weeks gestation
Secondary outcomes (1)
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.
Measured: From 40 weeks gestation to delivery
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Mar 2017
- Study start2 Jun 2016 (estimated)
- Primary completion28 Mar 2020
- Study completion28 Mar 2020
Why it stopped: Not able to recruit any participants
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Ductus ArteriosusStudies of the same condition, open and under way.
- More trials run by Unity Health TorontoThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 0 participants (actual)
Sponsor and investigators
- Lead sponsor
- Unity Health Toronto
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
- Investigators
- Howard Berger, MD, Principal investigator, Unity Health Toronto
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03073460
- Sponsor's protocol ID
- 16-037
- Status last verified
- Apr 2020
- First submitted
- 15 Feb 2017
- Last updated
- 30 Apr 2020
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 30 Apr 2020. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Role of Fetal Ductus Arteriosus in Predicting Spontaneous Labour at Term
- ClinicalTrials.gov ID
- NCT03073460
- Acronym / sponsor ID
- 16-037
- Conditions
- Ductus Arteriosus
- Study type
- Interventional
- Recruitment status
- WithdrawnReason stopped: Not able to recruit any participants
- Enrolment
- 0 participants (actual)
- Lead sponsor
- Unity Health TorontoUniversity, hospital or other
- Study start
- 2 Jun 2016 (estimated)
- Primary completion
- 28 Mar 2020 (actual)
- Study completion
- 28 Mar 2020 (actual)
- First posted
- 8 Mar 2017 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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.
Study design
- Primary purpose
- Diagnosis
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Ultrasound examination | Other | Other: Ultrasound examinationParticipants will undergo an ultrasound examination at 40 weeks gestation to assess the fetal ductus arteriosis. |
Who may qualify
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
Key inclusion criteria (1 listed)
- Low risk singleton pregnancy at 40 weeks gestation.
Key exclusion criteria (7 listed)
- Smoking
- Underlying cardiac or respiratory illness
- Fetal growth restriction
- Medicated gestational hypertension or evolving preeclampsia
- Gestational diabetes controlled with insulin or oral medications
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Ultrasound examinationThis exam is performed at 40 weeks gestation | Other | Ultrasound examination |
Primary outcome
Fetal ductus arteriosus changes
Time frame: 40 weeks gestation
To prospectively assess whether any changes in blood flow in the fetal ductus arteriosus exist at 40 weeks' gestation.
1 secondary outcome
Time to delivery
Time frame: From 40 weeks gestation to delivery
Results and safety
The study was withdrawn before enrolling participants, so there are no results.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 30 Apr 2020.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Howard Berger, MD principal investigator
Unity Health Toronto
Questions about this trial
What is this clinical trial studying?
A study testing Ultrasound examination in people with Ductus Arteriosus, run by Unity Health Toronto.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: withdrawn, as of the sponsor's last update on 30 Apr 2020. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study was withdrawn before enrolling participants, so there are no results.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Fetal ductus arteriosus changes (time frame: 40 weeks gestation). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 30 Apr 2020.