VNUS Medical Technologies was a medical device company founded in 1995 and headquartered in San Jose, California. The company specialized in developing minimally invasive treatments for venous reflux disease, particularly chronic venous insufficiency and varicose veins. Their flagship product was the VNUS Closure system, a catheter-based procedure that used radiofrequency energy to treat diseased veins. The company’s innovative RF Closure procedure provided an alternative to traditional vein stripping surgery, offering patients a less invasive option with shorter recovery times and reduced post-operative pain. The technology worked by delivering controlled radiofrequency energy to heat and contract the collagen in vein walls, effectively sealing them shut. In 2009, VNUS Medical Technologies was acquired by Covidien plc (now part of Medtronic) for approximately $440 million. The acquisition helped expand Covidien’s vascular therapy portfolio and strengthened its position in the venous insufficiency treatment market. Prior to the acquisition, VNUS had successfully treated over 500,000 patients worldwide and established a strong presence in the vascular surgery market. The company held numerous patents related to its radiofrequency ablation technology and contributed significantly to advancing the field of minimally invasive vein treatment procedures.