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NCT Number: NCT07210892

Paramedian Incidence Angles in Spinal Anaesthesia

The objective here is to quantify the number of punctures and redirections during routine practice in the anesthesiology department, verify the final angle of incidence and the sac-skin distance by ultrasound, and determine the optimal, maximum, and minimum angles that would have allowed successful punctures. The objective is also to correlate ultrasound and plain X-ray distances, if available. These angles would then be inferred in advance in patients who must undergo spinal anesthesia, assessing whether this prior estimate reduces the number of punctures and redirections.

Recruiting

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Key information

Conditions

Anesthesia; Adverse Effect, Spinal and Epidural

Sex eligibility

All sexes

Study type

Observational

Primary location

About this study

Protractors and visual guides may be used to guide the exact insertion angle according to the skin-to-dural sac distance or depending on the skin-to-transverse process distance when the midline approach is not feasible.

Who can participate

Healthy volunteers accepted: Yes

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

Inclusion criteria

patients submitted to spinal anaesthesia -

Exclusion criteria

none

-

Treatment and study plan

Measurement of needle insertion angles

Other

Individualization of needle insertion angle depending on the skin to dural sac distance by means of visual guides and adapted protractors

Primary outcomes

  1. Number of needle insertion attempts

    Time frame: From September 2025 to september 2026.

    Total number of times that the spinal needle is introduced in the skin

Secondary outcomes

  1. Number of needle redirections

    Time frame: From september 2025 to september 2028

    Total number of needle redirections in all insertion attempts in a single patient.

Study contacts

Contact information is provided by the study sponsor or research team.

Alberto Prats-Galino, M.D., Ph.D.

CONTACT

[email protected]

+34-93-4021900

Anna Puigdellívol-Sánchez, M.D., Ph.D.

CONTACT

[email protected]

+34-93-5884555

Sponsors and collaborators

Lead sponsor

Consorci Sanitari de Terrassa

Other

Collaborators

  • Hospital Clinic of Barcelona
  • University of Barcelona

Registry information

Important dates

Study start
2025
Primary completion
2026
Study completion
2028
First posted
Oct 7, 2025
Registry last updated
Jul 30, 2026

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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