Abstract: |
Treatment of knee osteoarthritis (OA) begins with conservative measures, including patient education, weight management, physical therapy (PT), and nonsteroidal anti-inflammatory drugs (NSAIDs). If these measures are not sufficient to reduce pain and improve function, intra-articular injections can be effective. Genicular nerve blocks (GNB) and radiofrequency ablation (RFA) are other nonsurgical treatment options for patients with chronic knee pain secondary. A common target for ultrasound-guided knee injections is the suprapatellar joint recess, which is located deep to the quadriceps tendon, between the suprapatellar fat pad and prefemoral fat pad. The genicular nerves include the superolateral (SLGN), superomedial (SMGN), inferolateral (ILGN), and inferomedial (IMGN) genicular nerves, which innervate their corresponding knee quadrants. Periarticular infection is a contraindication to knee joint injections and should be avoided in GNBs. General complications related to knee joint injections and GNBs include neurovascular damage, bleeding, damage to surrounding structures, transient increase in pain, and intravascular uptake of local anesthetic, resulting in systemic toxicity. However, these complications are diminished with the use of ultrasound where the physician can identify and avoid neurovascular structures. Knee joint injections and GNBs are effective treatment options for patients with chronic knee pain who have failed conservative measures. © 2025 selection and editorial matter, Alan Kaye, Mark Jones, Neal Rakesh, and Amitabh Gulati. |