Chronic knee osteoarthritis (OA) is a painful disorder common among adults of advanced age.1 Conventional radiofrequency has been reported as a minimally-invasive option for treating chronic knee pain.1,2,3,4
Knee pain treatment using Cosman RF equipment was featured on Good Evening Arizona. Dr. Neil Thakkar of Novocur Pain Management discusses the treatment and performs a procedure using the Cosman G4 generator and TCN nitinol electrodes.
The Cosman G4 generator can treat multiple nerves innervating a painful knee joint1,2,3,4 at the same time, thereby reducing procedure time and OR usage. Cosman TCN electrodes and RF cannula are reliable and cost-effective.
By adjusting RF cannula size and generator settings, conventional monopolar and bipolar RF can create ablation zones of different sizes, including those larger than cooled RF.5
Average midline width W, length L, depth D, and volume V of large RF heat lesions for 3:15 minutes total time. This comprises a 15-second ramp plus 3 minutes at the set temperature for conventional lesions, or 45 seconds of pre-treatment cooling plus 2.5 minutes of RF heating for the cooled RF lesions. (A) Monopolar heat lesions. (B) Bipolar heat lesions with tip spacing s, shown in two cross sections. Average lesion size is assessed by color change in fresh bovine liver ex vivo. Ex vivo lesions may differ from clinical lesions.5
Clinical Studies and Publications
Choi et al. Radiofrequency treatment relieves chronic knee osteoarthritis pain: A double-blind randomized controlled trial. Pain 2011;152:481-7. [PDF]
Djibilian et al. Ultrasound-guided sciatic nerve pulsed radiofrequency for chronic knee pain treatment: a novel approach. J Anesth. 2013;27(6):935-938. [PDF]
Ikeuchi et al. Percutaneous Radiofrequency Treatment for Refractory Anteromedial Pain of Osteoarthritic Knees. Pain Med. 2011;12:546-551. [PDF]
Akbas et al. Efficacy of pulsed radiofrequency treatment on the saphenous nerve in patients with chronic knee pain. JBMR 2011;24:77-82. [PDF]
Cosman et al. Factors That Affect Radiofrequency Heat Lesion Size. Pain Med. 2014;15(12):2020-2036. [PDF]