Comparing curved and straight needles for S1 epidural injections

A Comparison of Intravascular Penetration With Curved Needle and Straight Needle During Sacral 1 Transforaminal Epidural Block

Not applicable Interventional Kyungpook National University Chilgok Hospital · NCT05956054

This study is testing whether using a curved needle or a straight needle for S1 epidural injections makes a difference in how often the needle accidentally enters a blood vessel.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment240 (estimated)
Ages18 Years to 80 Years
SexAll
SponsorKyungpook National University Chilgok Hospital Academic / other
Locations1 site (Daegu)
Trial IDNCT05956054 on ClinicalTrials.gov

What this trial studies

This observational study aims to compare the rate of intravasation during S1 transforaminal epidural injections using either a curved needle or a straight needle. Participants will be randomly assigned to receive the injection with one of the two needle types, and the researchers will monitor and compare the intravasation rates between the groups. The study seeks to determine if the choice of needle affects the likelihood of intravascular penetration during the procedure.

Who should consider this trial

Good fit: Ideal candidates are patients scheduled for a lumbar 1 epidural nerve block at Kyungpook National University Hospital.

Not a fit: Patients with allergies to local anesthetics or steroids, or those with a bleeding tendency or infection symptoms in the sacroiliac region may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved safety and efficacy in administering S1 transforaminal epidural injections.

How similar studies have performed: While similar studies have explored needle types in various contexts, this specific comparison of curved versus straight needles in S1 injections is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients scheduled for a lumbar 1 epidural nerve block in the outpatient department of anesthesiology and pain medicine at Kyungpook National University Hospital.

Exclusion Criteria:

1. Patients with a history of allergy to local anesthetics or steroids
2. Patients with a history of allergy to contrast media
3. Patients with a bleeding tendency
4. Patients with symptoms of infection in the sacroiliac region
5. Patients under 18 years of age or over 80 years of age
6. Patients who are pregnant or planning to become pregnant
7. Other medically incapable of consent, such as the mentally retarded.

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Where this trial is running

Daegu

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions S1 Transforaminal Epidural InjectionS1 transforaminal epidural injectioncurved needle
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.