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Skeletal Radiology
Published in: Skeletal Radiology 4/2013

01-04-2013 | Technical Report

High-resolution magnetic resonance-guided posterior femoral cutaneous nerve blocks

Authors: Jan Fritz, Cary Bizzell, Sudhir Kathuria, Aaron J. Flammang, Eric H. Williams, Allan J. Belzberg, John A. Carrino, Avneesh Chhabra

Published in: Skeletal Radiology | Issue 4/2013

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Abstract

Objective

To assess the feasibility, technical success, and effectiveness of high-resolution magnetic resonance (MR)-guided posterior femoral cutaneous nerve (PFCN) blocks.

Materials and methods

A retrospective analysis of 12 posterior femoral cutaneous nerve blocks in 8 patients [6 (75 %) female, 2 (25 %) male; mean age, 47 years; range, 42–84 years] with chronic perineal pain suggesting PFCN neuropathy was performed. Procedures were performed with a clinical wide-bore 1.5-T MR imaging system. High-resolution MR imaging was utilized for visualization and targeting of the PFCN. Commercially available, MR-compatible 20-G needles were used for drug delivery. Variables assessed were technical success (defined as injectant surrounding the targeted PFCN on post-intervention MR images) effectiveness, (defined as post-interventional regional anesthesia of the target area innervation downstream from the posterior femoral cutaneous nerve block), rate of complications, and length of procedure time.

Results

MR-guided PFCN injections were technically successful in 12/12 cases (100 %) with uniform perineural distribution of the injectant. All blocks were effective and resulted in post-interventional regional anesthesia of the expected areas (12/12, 100 %). No complications occurred during the procedure or during follow-up. The average total procedure time was 45 min (30–70) min.

Conclusions

Our initial results demonstrate that this technique of selective MR-guided PFCN blocks is feasible and suggest high technical success and effectiveness. Larger studies are needed to confirm our initial results.
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Metadata
Title
High-resolution magnetic resonance-guided posterior femoral cutaneous nerve blocks
Authors
Jan Fritz
Cary Bizzell
Sudhir Kathuria
Aaron J. Flammang
Eric H. Williams
Allan J. Belzberg
John A. Carrino
Avneesh Chhabra
Publication date
01-04-2013
Publisher
Springer-Verlag
Published in
Skeletal Radiology / Issue 4/2013
Print ISSN: 0364-2348
Electronic ISSN: 1432-2161
DOI
https://doi.org/10.1007/s00256-012-1553-8

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