Kang Meilin Fotek. Arthroscopy is a rod-shaped optical instrument with a diameter of about 5mm, which is used to observe the internal structure of joints and is an endoscope used to diagnose and treat joint diseases. Demeter arthroscopy belongs to American Kangmeilin Fortek brand. The brand is a global medical technology company, founded in 1970, headquartered in new york, USA, and dedicated to the innovation and promotion of minimally invasive technologies and products in orthopedics and surgery.