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.

NCT Number	NCT07210892
Lead Sponsor	Consorci Sanitari de Terrassa Collaborators: University of Barcelona, Hospital Clinic of Barcelona
Conditions	Anesthesia; Adverse Effect, Spinal and Epidural
Enrollment	90 participants
Start Date	2025-09-30
Primary Completion	2026-09-30 (estimated)
Study Completion	2028-09-04 (estimated)
Updated on ClinicalTrials.gov	2026-07-30