Affordable Access

deepdyve-link
Publisher Website

Accuracy of fluoroscopic-guided genicular nerve blockade: a need for revisiting anatomical landmarks.

Authors
  • Fonkoue, Loïc1, 2
  • Behets, Catherine Wydemans3
  • Steyaert, Arnaud4, 5
  • Kouassi, Jean-Eric Kouame2
  • Detrembleur, Christine2
  • De Waroux, Bernard Le Polain4
  • Cornu, Olivier2, 6
  • 1 Department of Morphology, Experimental and Clinical Research Institute, Universite catholique de Louvain, Brussels, Belgium [email protected] , (Belgium)
  • 2 Neuro-Musculo-Skeletal Department (NMSK), Experimental and Clinical Research Institute, Université catholique de Louvain, Brussels, Belgium. , (Belgium)
  • 3 Department of Morphology, Experimental and Clinical Research Institute, Universite catholique de Louvain, Brussels, Belgium. , (Belgium)
  • 4 Department of Anesthesia and Pain Medicine, Cliniques universitaires Saint-Luc, Bruxelles, Belgium. , (Belgium)
  • 5 Institute of Neuroscience (IONS), Universite catholique de Louvain, Brussels, Belgium. , (Belgium)
  • 6 Department of Orthopedics and Trauma, Cliniques universitaires Saint-Luc, Bruxelles, Belgium. , (Belgium)
Type
Published Article
Journal
Regional anesthesia and pain medicine
Publication Date
Aug 26, 2019
Identifiers
DOI: 10.1136/rapm-2019-100451
PMID: 31451628
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Genicular nerve blockade (GNB) and radiofrequency ablation (RFA) have recently emerged as treatment options for patients with chronic knee pain. However, an increasing number of anatomical studies and systematic reviews concluded that the anatomical basis for needle placement was unclear, incomplete and somewhat inaccurate. This study was designed to assess the accuracy of updated anatomical landmarks for fluoroscopy-guided blockade of the consistent genicular nerves in a cadaveric model. Based on a comprehensive review of recent anatomical studies and prior dissection of 21 fresh cadaver knees, we defined bony landmarks with high likelihood of successful ablation of the five consistent genicular nerves (GN). We tested the accuracy of GNBs using the above-stated anatomical landmarks in 10 intact fresh cadaveric knees. Needle placement was guided by fluoroscopy and 0.5 mL of 0.1% methylene blue was injected at the site of each nerve. The knees were subsequently dissected to assess the accuracy of the injections. If the nerve was dyed with blue ink, the placement was considered accurate. The accuracy of our injections was 100% for the superior medial genicular nerve, inferior medial GN, infrapatellar branch of saphenous nerve and recurrent fibular nerve. The superior lateral GN was dyed in 90% of specimens. This study provides physicians with precise anatomical landmarks for the five consistent GN for fluoroscopic-guided GNB. Our revised technique, which targets more nerves with increased accuracy, could potentially lead to improved therapeutic benefits on chronic knee pain. © American Society of Regional Anesthesia & Pain Medicine 2019. No commercial re-use. See rights and permissions. Published by BMJ.

Report this publication

Statistics

Seen <100 times