Comparison Between Ultrasound-Guided Genicular Nerve Phenol Neurolysis and Intra-articular Steroid Injections

1.5 mL of aqueous phenol will be injected at each target genicular nerve under ultrasound guidance

40 mg of methylprednisolone diluted in 5 mL of 0.9% normal saline will be injected inside the knee joint capsule under ultrasound guidance

Single injection 1.5 mL of 0.9% normal saline outside the knee joint capsule under ultrasound guidance

1.5 mL of 0.9% normal saline will be injected subcutaneously at each target genicular nerve under ultrasound guidance