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

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: NCT01400880
Recruitment Status : Completed
First Posted : July 22, 2011
Results First Posted : February 12, 2015
Last Update Posted : February 12, 2015
Information provided by (Responsible Party):
Convergent Engineering, Inc.

Brief Summary:
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.

Condition or disease

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.

Study Type : Observational
Actual Enrollment : 103 participants
Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Electrode-based Sensor for Non-invasive Fetal Heart Rate and EMG Monitoring With Improved Reliability
Study Start Date : July 2011
Actual Primary Completion Date : April 2014
Actual Study Completion Date : April 2014

In Labor

Primary Outcome Measures :
  1. Comparison of Electrode Sensor and TOCO Detection of Contraction Events, as Compared to IUPC [ Time Frame: Stage I and II Labor ]
    Contraction timing as measured by the electrode sensor and contraction timing as measure by the TOCO, both compared to the contraction timing as measured by the IUPC gold standard. The contraction timing values of the electrode sensor and TOCO were then compared.

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 50 Years   (Adult)
Sexes 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

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01400880

United States, Florida
University of Florida College of Medicine
Gainesville, Florida, United States, 32611
Sponsors and Collaborators
Convergent Engineering, Inc.
Principal Investigator: Anthony Gregg, PhD University of Florida

Responsible Party: Convergent Engineering, Inc. Identifier: NCT01400880     History of Changes
Other Study ID Numbers: Conveng-001
First Posted: July 22, 2011    Key Record Dates
Results First Posted: February 12, 2015
Last Update Posted: February 12, 2015
Last Verified: February 2015

Keywords provided by Convergent Engineering, Inc.:
Maternal Fetal Monitoring