Instrument Assisted Soft Tissue Mobilization Instruments (IASTM) have been used for centuries in Chinese medicine. They called the technique Guasha which translates to “scrapping or scratching”. Instruments have been further developed and improved in recent years by many different companies such as MiyoDac® and Graston Techniques®. Using this traditional concept, Stroma Therapists employ the highest level of technique in using these tools to enhance the healing effect.