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Electrode-based Sensor for Non-invasive Fetal Heart Rate and EMG Monitoring With Improved Reliability

The recruitment status of this study is unknown because the information has not been verified recently.
Verified July 2011 by Convergent Engineering, Inc..
Recruitment status was  Recruiting
Information provided by:
Convergent Engineering, Inc. Identifier:
First received: July 21, 2011
Last updated: September 16, 2013
Last verified: July 2011

The specific goal of the proposed research is to develop a reliable, non-invasive fetal and maternal heart rate and contraction monitor that is unaffected by obesity and requires less nursing intervention than the tocodynamometer and Doppler ultrasound.


Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Electrode-based Sensor for Non-invasive Fetal Heart Rate and EMG Monitoring With Improved Reliability

Further study details as provided by Convergent Engineering, Inc.:

Estimated Enrollment: 100
Study Start Date: July 2011
Detailed Description:

The majority of obstetric deliveries in the US undergo electronic monitoring and continuous uterine activity and fetal heart rate (FHR) monitoring is the standard of care. Typically, external transducers are employed, the reliability of which depends on their proper positioning, which may be disturbed by patient or fetal movement. The tocodynamometer (strain gauge, toco for short) provides frequency and timing of contractions, but requires transmission of tension from the uterus to the sensor. Fetal heart rate is acquired with an external Doppler ultrasound transducer. The reliability of this monitor depends on the ability to obtain a window to the fetal heart.

In some patients, particularly the obese, the toco and ultrasound may fail to monitor consistently. In others both transducers require frequent repositioning by the nursing staff, and the Doppler may erroneously report maternal heart rate instead of fetal.

The alternative uterine activity monitor is an intrauterine pressure catheter (IUPC), which is placed through the cervical os in the adequately dilated patient with ruptured membranes. While this monitor usually provides a more reliable signal than the toco, as well as quantitative information regarding intrauterine pressure, it is invasive and there is an increased risk of infection. The alternative FHR monitor is via fetal scalp electrode (FSE), which is applied transvaginally to the fetal presenting part, also requiring adequate cervical dilation and ruptured membranes. While the FSE usually provides a more reliable signal, it is similarly invasive and increases risk of infection.


Ages Eligible for Study:   18 Years to 50 Years
Genders Eligible for Study:   Female
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Laboring women in Labor and Delivery ward


Inclusion Criteria:

  • Women between the ages of 18 and 50 years old
  • >/= 34 weeks gestation
  • Single viable fetus in cephalic presentation

Exclusion Criteria:

  • Bleeding or uterine scarring
  Contacts and Locations
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, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01400880

United States, Florida
University of Florida College of Medicine Recruiting
Gainesville, Florida, United States, 32611
Contact: Anthony Gregg, MD    352-273-7562      
Sponsors and Collaborators
Convergent Engineering, Inc.
Principal Investigator: Anthony Gregg, PhD University of Florida
  More Information

No publications provided

Responsible Party: Anthony Gregg, MD, University of Florida College of Medicine Identifier: NCT01400880     History of Changes
Other Study ID Numbers: Conveng-001
Study First Received: July 21, 2011
Last Updated: September 16, 2013
Health Authority: United States: Food and Drug Administration

Keywords provided by Convergent Engineering, Inc.:
Maternal Fetal Monitoring processed this record on November 24, 2014