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Fetal Blood Flow Response to Partial Occlusion by External Compression

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified March 2013 by Meir Medical Center.
Recruitment status was:  Not yet recruiting
Information provided by (Responsible Party):
Meir Medical Center Identifier:
First received: March 20, 2013
Last updated: March 21, 2013
Last verified: March 2013
Two earlier studies showed measurable fetal hemodynamics changes caused by external pressure induced by te abdominal ultrasound transducer. The investigators would like to study the response of flow in main fetal vessels to different, mild to moderate pressures induced by the abdominal transducer. The pressure induced by the transducer will be measured by a digital computed manometer. The flow chances in fetal vessels will be measured by ultrasound Doppler. Measurements will be taken on different pregnancy weeks, on one occasion in each pregnant woman. Ones without applying transducer pressure (control) and ones after applying mild pressure.

Gestational Age

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective

Further study details as provided by Meir Medical Center:

Primary Outcome Measures:
  • pulsatility index in fetal vessels [ Time Frame: at the time of pressure aplication ]

Estimated Enrollment: 50
Study Start Date: March 2013
Estimated Primary Completion Date: October 2013 (Final data collection date for primary outcome measure)

Ages Eligible for Study:   18 Years to 45 Years   (Adult)
Sexes Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
pregnant women

Inclusion Criteria:


Exclusion Criteria:

multiple gestation

  Contacts and Locations
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No Contacts or Locations Provided
  More Information

Responsible Party: Meir Medical Center Identifier: NCT01816737     History of Changes
Other Study ID Numbers: MMC13191-12CTIL
0191-12-MMC ( Other Identifier: Helsinki committee , MeirMc, Israel )
Study First Received: March 20, 2013
Last Updated: March 21, 2013 processed this record on September 21, 2017