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Can ultrasound replace X-Rays for epidural checks?

NCT ID NCT06556836

Diagnosis Sponsor: Instituto Nacional de Ciencias Medicas y Nutricion Salvador Zubiran Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study tested whether ultrasound can accurately locate epidural catheters in 66 adults undergoing open abdominal surgery. Participants had their catheter placement checked with both ultrasound and epidurography (an X-ray method). The goal was to see if ultrasound could serve as a reliable, less invasive alternative for confirming correct placement.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Doppler color and M-Mode ultrasound
What this could lead to
If ultrasound proves accurate, it could replace epidurography as a simpler, less invasive way to confirm epidural catheter placement during surgery.
What could go wrong
This is a small, completed study with only 66 participants, so results may not apply to all patients or settings. Ultrasound may not be as reliable as the gold standard.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

66 people

The number who actually took part.

Started

Aug 2024

Finished

Aug 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Patients of both sexes, aged 18 and over, who provide informed consent, scheduled for major open abdominal surgery requiring epidural analgesia at the Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, will be approached for participation. Inclusion and exclusion criteria will be applied to identify eligible participants. Those who meet the criteria and provide informed consent will be enrolled in the study. The sample size will be adjusted to ensure that 50 patients are recruited.

Ages

18 to 99 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Adults aged 18 years or older * Provided informed consent * Scheduled for major open abdominal surgery that necessitates epidural analgesia * Capable of completing the PAIN OUT questionnaire Exclusion Criteria: * Contraindications to epidural analgesia * Communication or cognitive impairments that prevent understanding or completing the questionnaire * Neurological disorders that affect sensory or motor function * Critical illness or unstable medical conditions * Use of anticoagulants * Advanced liver cirrhosis * Certain specific surgical procedures where epidural analgesia is contraindicated or not applicable * Allergy to contrast agent

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Epidural analgesia Open abdominal surgery

Contacts and locations

Locations

  • Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán

    Tlalpan, Mexico City, 14080, Mexico

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