NCT07210892|Recruiting
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Sponsor study identifier
observational
90
1 country
1
Study Start
September 30, 2025
Actual (reported)Primary Completion
September 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
September 4, 2028
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
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.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
September 4, 2028
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
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Some registry-reported names shown below are not yet linked in this graph.
Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
September 30, 2025
Actual (reported)September 30, 2025
Actual (reported)October 7, 2025
Actual (reported)September 30, 2026
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
September 4, 2028
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
Number of needle insertion attempts
Total number of times that the spinal needle is introduced in the skin
From September 2025 to september 2026.
Number of needle redirections
From september 2025 to september 2028
Description of usual needle insertion attempts and redirections.
Individualization of needle insertion angle depending on the skin to dural sac distance by means of visual guides and adapted protractors
Registry-reported names are shown in full. Names without a link have not yet been matched to a Syfrah profile.
Any patients requiring spinal anaesthesia
Contact the study team to confirm eligibility.
APuigdellivolSanchez
Barcelona, Barcelona, 08036, Spain
Puigdellivol-Sanchez A, Reina MA, Sala-Blanch X, Pomes-Tallo J, Prats-Galino A. Pythagoras and Cosines: The skin-dural sac distance and optimal angles in paramedian spinal anesthesia. Clin Anat. 2016 Nov;29(8):1046-1052. doi: 10.1002/ca.22792. Epub 2016 Oct 6.
Kim Y, Yoo S, Park SK, Bae H, Lim YJ, Kim JT. Optimal angle of needle insertion for spinal anesthesia in patients with spondylolisthesis: an ultrasonographic study. BMC Anesthesiol. 2021 Sep 8;21(1):221. doi: 10.1186/s12871-021-01444-0.
Alberto Prats-Galino, M.D., Ph.D
University of Barcelona
Xavier Sala-Blanch, M.D.
Hospital Clinic of Barcelona
First Submitted
September 30, 2025
First Posted
October 7, 2025
Study Start
September 30, 2025
Actual (reported)Primary Completion
September 30, 2026
Estimated (date passed)Puigdellivol-Sanchez A, Labandeyra H, Prats-Galino A, Sala-Blanch X. The Transverse Process as a Landmark for Estimating Dural Sac Depth and Feasible Planes for Optimized Paramedian Needle Insertions. NeuroSci. 2025 Nov 21;6(4):119. doi: 10.3390/neurosci6040119.
Labandeyra H, Sala-Blanch X, Prats-Galino A, Puigdellivol-Sanchez A. Neuraxial Anesthesia and Risk of Root Damage: A 3D Ex Vivo Study. NeuroSci. 2024 Dec 3;5(4):623-634. doi: 10.3390/neurosci5040044.
This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
September 4, 2028
EstimatedPlanned date reported by the registry; this milestone is not confirmed as achieved.
Last Updated
July 30, 2026
Record last verified: 2026-07
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Source: ClinicalTrials.gov.
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