Fetal Blood Flow Response to Partial Occlusion by External Compression

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01816737
Recruitment Status : Unknown
Verified March 2013 by Meir Medical Center.
Recruitment status was:  Not yet recruiting
First Posted : March 22, 2013
Last Update Posted : March 22, 2013
Information provided by (Responsible Party):
Meir Medical Center

Brief Summary:
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.

Condition or disease
Gestational Age

Study Type : Observational
Estimated Enrollment : 50 participants
Observational Model: Case Control
Time Perspective: Prospective
Study Start Date : March 2013
Estimated Primary Completion Date : October 2013

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

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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

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 )
First Posted: March 22, 2013    Key Record Dates
Last Update Posted: March 22, 2013
Last Verified: March 2013