Radiofrequency ablation near the bone-muscle interface alters soft tissue lesion dimensions

Regional Anesthesia and Pain Medicine
Maxim S EckmannSomayaji Ramamurthy

Abstract

Radiofrequency (RF) lesions are safe and effective in the treatment of spine pain; however, models developed to study factors affecting lesion dimensions have been performed in homogeneous media that may not accurately simulate human anatomy and electrophysiology. We present a novel ex vivo porcine model for performing RF lesion studies and report the influence of bone on projection of RF ablation lesions into soft tissue. Radiofrequency lesions were performed in porcine rib specimens using monopolar 18-gauge, 10-mm straight active tip cannula, with a lesion temperature of 80°C for 150 seconds. Ten lesions were performed in pure porcine muscle tissue and abutting porcine rib bone with surrounding muscle. Lesions were exposed with dissection and measured with digital calipers. Maximal effective lesion radius approximately doubled against the bone compared with the pure muscle group (mean, 5.65 mm [95% CI, 5.43-5.87 mm] vs 2.68 mm [95% CI, 2.55-2.81 mm], P < .0001), although this was seen only in a vertical direction and not horizontally. In addition, the prelesion and postlesion impedance of the bone-muscle interface was consistently higher than the muscle-only interface (mean, 165.6 Ohm [95% CI, 146.6-184.6 Ohm] vs 137.8 Ohm [9...Continue Reading

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Citations

Feb 20, 2016·International Journal of Gynaecology and Obstetrics : the Official Organ of the International Federation of Gynaecology and Obstetrics·Bernhard KrämerSara Y Brucker
Jan 15, 2016·Pain Medicine : the Official Journal of the American Academy of Pain Medicine·Tim J LamerHalena M Gazelka
Oct 25, 2016·Regional Anesthesia and Pain Medicine·Roderick J FinlaysonDe Q H Tran
Aug 5, 2017·AJR. American Journal of Roentgenology·A Nicholas KurupMatthew R Callstrom
Sep 9, 2020·Pain Medicine : the Official Journal of the American Academy of Pain Medicine·Beau P SperryZachary L McCormick
Jun 28, 2020·Techniques in Vascular and Interventional Radiology·Ahmad ParvinianAnil N Kurup
Nov 18, 2021·Pain Medicine : the Official Journal of the American Academy of Pain Medicine·Robert W HurleySteven P Cohen

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