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Ultrasound study aims to make spinal anesthesia safer for C-Sections

NCT ID NCT06711601

Knowledge-focused Sponsor: The Third Affiliated Hospital of Guangzhou Medical University Source: ClinicalTrials.gov ↗

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jul 21, 2026 · Updated 3 times

Summary

This study tests whether using the posterior superior iliac spine (PSIS) as a landmark is more accurate than the traditional iliac crest line for spinal anesthesia in cesarean sections. Researchers will use ultrasound to measure the distance from each landmark to the correct spinal space in 660 pregnant women. The goal is to find a safer, more reliable method to guide the needle and reduce the risk of injury.

What this could mean

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

What this could lead to
If successful, this could help anesthesiologists choose a more reliable landmark for spinal anesthesia, potentially reducing complications and improving safety for women undergoing cesarean sections.
What could go wrong
This is an observational study, not testing a new treatment. The results may not apply to all patients, especially those with high BMI or spinal abnormalities. The benefit depends on how well the findings translate into practice.

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

650 people

The number who actually took part.

Started

Dec 2024

Finished

Jan 2026

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

We enrolled parturients aged 22-45 years at 37-42 weeks of gestation scheduled for epidural or combined spinal-epidural anesthesia (for labor or cesarean section)

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Female participants only

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: * After obtaining written informed consents,pregnant women at 37-42 weeks of gestation Exclusion Criteria: * BMI ≥ 40 kg/m² (to minimize palpation variability), History of lumbar surgery/deformity (scoliosis, spondylolisthesis or osteoporotic vertebral collapse), Inability to maintain the flexed lateral decubitus position, Participant withdrawal, Unforeseen anatomical anomalies discovered during screening.

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As listed by the trial registrant

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

Intercristal line Posterior superior iliac spine Spinal anesthesia Ultrasonography

Contacts and locations

Locations

  • The Third Affiliated Hospital of Guangzhou Medical University

    Guangzhou, Guangdong, China

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