CClinicalTrials.gg
TerminatedNCT04081623Updated Aug 11, 2021

Trans-abdominal Fetal Pulse Oximetry: Signal Integrity

An observational study in Fetal Distress, sponsored by Raydiant Oximetry, Inc.. Terminated at 1 site in United States. Open to female participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2021-08-11.

Sponsored by Raydiant Oximetry, Inc. · Observational

Why this study was terminated
COVID-19
Study type
Observational
Model
Case-only
Time perspective
Prospective
Enrollment
9
Ages
18 Years and older
Sex
Female
01

Study summary

This project is set up to advance and integrate the established mathematical principles of oxygen saturation to model with increasing accuracy the "body in a body" problem of fetus in mother; similar to existing pulse oximeters,

Read the detailed description

The investigational device is a non-invasive fetal pulse oximeter that measures fetal arterial pulse signal using safe, noninvasive, transabdominal near-infrared spectroscopy. The optical sensor will obtain fetal pulse oximetry signals. Women will also undergo sonographic evaluation to assess distance from maternal skin to fetal tissue and to confirm fetal presentation and position. There is no change to standard of care procedures for fetal heart rate monitoring. The fetal heart rate that will be monitored with the investigational device will be used for research purposes only. Results will not be used to guide or alter patient management.

02

Conditions studied

  • Fetal Distress

Browse trials for

03

In context

Fetal Distress

35 studies on the registry are indexed under Fetal Distress; 7 are open to participants now.

This study's enrollment of 9 is below the median of 90 across 11 observational studies indexed under Fetal Distress.

Browse Fetal Distress studies →

Lead sponsor

Raydiant Oximetry, Inc. is the lead sponsor of 7 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Female
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Women undergoing their scheduled visit to the MFM clinic for a NST/BPP or in latent labor

Inclusion criteria

  1. Pregnant women with singleton pregnancies, vertex presentation
  2. Age ≥ 18 years
  3. Healthy women ≥ 28 weeks gestation undergoing either Non-Stress test (NST) or Biophysical profile (BPP) OR
  4. Healthy women ≥ 37 weeks in labor
  5. Vertex presentation

Exclusion criteria

Exclusion Criteria:

  1. Age \<18 years
  2. Multiple gestation ( twins, triplets)
  3. Presentation other than vertex
  4. \< 28 weeks of gestation
05

Study design

Observational model
Case-only
Time perspective
Prospective
Enrollment
9 participants (actual)
Patient registry
No

Groups and cohorts

  • Clinic

    This group is undergoing their scheduled visit for Non-Stress Test (NST) or Biophysical Profile (BPP)

    Device: Raydiant Oximetry Sensing System

  • Labor and Delivery

    This group is in active labor.

    Device: Raydiant Oximetry Sensing System

Interventions

  • DeviceRaydiant Oximetry Sensing System

    The investigational device is used to record fetal pulse signals.

    Also known as: ROSS

06

What researchers measure

Primary outcomes

  1. Fetal signal integrity

    Integrity of the fetal signal relative to background maternal signal and biologic/electronic noise, and related to fetal position, presentation and the depth of the fetus from maternal skin.

    Time frame: During NST, BPP, or active labor

07

Study locations

1 site
  • Tufts Medical Center
    Boston, Massachusetts 02111, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 11, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04081623
Lead sponsor
Raydiant Oximetry, Inc.
Responsible party
Sponsor
First posted
Sep 9, 2019
Start date
Apr 16, 2019
Primary completion
May 20, 2021
Completion
Jun 8, 2021
Last update
Aug 11, 2021

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
Yes
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Aug 2021. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion