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Completed

NCT Number: NCT05765539

Performance of the Echopen Probe in Its Clinical Use for Pregnancy Follow-up in Senegal

Pregnancy follow-up in a country with limited resources in decentralized areas usually consists of a clinical examination exclusively because of a lack of access to additional examination equipment and qualified personnel to use them. However, the pregnancy follow-up relies in part on the visual investigation by ultrasound scanners that estimate the risks of morbi-mortality for the mother and child during and after pregnancy. The WHO recommendations support at least one ultrasound before 24 weeks of amenorrhea. Thus, at the same time as a usual clinical examination, the possibility of visually assessing certain relevant criteria would help to increase the effectiveness of follow-up visits without complicating the care journey. A simple ultra-portable device would be an opportunity for caregivers to facilitate the detection of complications and thus offer a more adapted follow-up and orientation.

This would allow, in contexts where resources are limited, to improve monitoring and limit the risks of complications due to inappropriate management.

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Key information

Conditions

Pregnancy Related

Age range

18 year and older

Sex eligibility

Female

Study type

Interventional

Phase

Not applicable

Primary location

Poste de Santé de Karang, Karang Poste, Fatick, Senegal

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About this study

The echOpen O1 Ultrasound Probe is a medical device designed to guide the diagnosis during clinical examination by providing a non-invasive, non-irradiant inside body image.

The investigator's hypothesis is that the use of this ultrasound stethoscopy probe during pregnancy, by a trained midwife, would improve the development and outcome of pregnancy for women by identifying situations requiring specificity. Through this protocol, the investigators propose a pilot study to evaluate, under field conditions, the performance of the echOpen O1 probe as part of the 3rd-trimester pregnancy monitoring, compared to a standard ultrasound examination, routinely performed with an ultrasound machine.

The main objective of this prospective pilot study is to evaluate the performance and operationality of the echOpen O1 probe from the 37th week of amenorrhea.

The secondary objectives are :

  • To evaluate the feasibility and usability of the echOpen O1 probe in the context of pregnancy monitoring by midwives and in zone field conditions:
  • One urban health center (Centralized)
  • One rural health center (Decentralized)
  • Assess women's quality of life during pregnancy and obtain satisfaction with echOpen O1 probe.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Pregnancy ≥ 37 weeks of amenorrhea
  • Women aged ≥ 18 years old
  • Delivery scheduled to take place in the recruitment center
  • Have given her written informed consent to participate

Exclusion criteria

  • Known fetal morphological abnormality
  • Emergency context during the participant's management
  • Obstetrical work in progress
  • Women anticipating displacement or no delivery at the clinical site

Treatment and study plan

echOpen O1 Handheld Ultrasound device

Device

The performance of the Handheld ultrasound device (echOpen O1 device) will be assessed during these visits for all evaluation criteria.

  • One examination with the US machine by the midwife focused on 4 targets ;
  • One examination with a classic US machine by the same midwife (comparator) including the search for the four targets ;
  • One examination with the US machine by a second operator ; Review of the images obtained by the US machine by the referring radiologist at a separate point of time.

The mode of delivery and the vital status of the mother and newborn will also be collected.

Operator A will start by using either the echOpen O1 device or the US machine (random order, via sealed envelopes) and will then perform the other type of examination.

Another operator (Operator B) will come to perform an examination with the Handheld ultrasound device (blind to the result of the first operator).

The switch between operators A and B will also be random.

Other names: Multicentric prospective comparative study

Primary outcomes

  1. The intra-operator agreement

    Time frame: Day 0

    The intra-operator agreement will be measured on the result of the 4 ultrasound targets chosen. The 4 ultrasound targets for each pregnancy are:

    The fetal position; Number of fetuses; Fetal vitality (presence of fetal heartbeat) Placental implantation To define an intra-operator concordance, the images for the 4 ultrasound targets (collected by the same operator) must be identical for both devices (echOpen probe and Ultrasound device routinely used in pregnant women)

Secondary outcomes

  1. The inter-operator agreement

    Time frame: Day 0

    The inter-operator concordance will be measured on the result of the 4 ultrasound targets chosen. The 4 ultrasound targets for each pregnancy are:

    The fetal position; Number of fetuses; Fetal vitality (presence of fetal heartbeat) Placental implantation To define an inter-operator concordance, the images on the 4 ultrasound targets (collected by two different operators) must be identical for the same device (echOpen probe).

    All ultrasound images will go to the radiologist for review and validation. This review will be done blindly of the result provided by the operators.

Sponsors and collaborators

Lead sponsor

echOpen Factory

Industry

Collaborators

  • Fondation Sanofi Espoir
  • Institut Pasteur de Dakar

Registry information

Acronym: PRESTO

Important dates

Study start
2023
Primary completion
2024
Study completion
2025
First posted
Mar 13, 2023
Registry last updated
Sep 19, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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