New landmark could make spinal anesthesia safer
NCT ID NCT07396961
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether a line drawn between the hip bones (ASIS line) is more reliable than the usual method (Tuffier's line) for finding the correct spot on the lower back for spinal anesthesia. Researchers will mark both lines on 140 adults and use ultrasound to see which line hits the right vertebra more consistently. The goal is to improve accuracy and safety during spinal anesthesia procedures.
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 the ASIS line proves more consistent, it could give doctors a better way to locate the correct spot for spinal anesthesia, potentially reducing complications.
- What could go wrong
- This is a small, early-stage observational study with only 140 participants. The results may not apply to everyone, and the ASIS line might not be more accurate than the current method.
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
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About 140 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Feb 2026
An estimate. Start dates often move.
- Expected to finish
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Feb 2028
An estimate. End dates often move.
- Lead sponsor
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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 visiting the study centers (Kangbuk Samsung Hospital or St. Vincent's Hospital) who are scheduled for spinal anesthesia or lumbar ultrasound.
- Ages
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18 to 85 years
- Sex
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Anyone
- Healthy volunteers
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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 Hide 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 to 85 years * Patients scheduled for spinal anesthesia or lumbar ultrasound * Participants who voluntarily agreed to participate and provided written informed consent Exclusion Criteria: * History of spinal surgery or spinal deformity * Infection or wounds at the puncture site * Inability to maintain the lateral decubitus position * Congenital lumbosacral transitional vertebrae (e.g., sacralized L5 or lumbarized S1) * Any other condition deemed unsuitable for the study by the investigator
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
2 sites. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Kangbuk Samsung Hospital
Seoul, 03181, South Korea
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St. Vincent's Hospital
Suwon, North Carolina, 27516, South Korea
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