46 patients with mild to moderate knee osteoarthritis were randomized to 2 weeks treatment of either phonophoresis (PhP), using ultrasound and 0.5% piroxicam gel, or to ultrasound treatment alone (UT). The study investigated the effects of phonophoresis in improving knee function and pain, by promoting the absorption of non-steroidal anti-inflammatory drug (NSAID) using an ultra-sound. Post-treatm...