Sound Assisted Soft Tissue Mobilization (SASTM) is similar to the Graston or IASTM tools, which utilizes small instruments to stroke a soft tissue surface. The instruments effectively break down fascial restrictions and scar tissue. The ergonomic designs of these instruments provide the clinician with the ability to locate restrictions through sound waves. This allows the clinician to treat the affected area with the appropriate amount of pressure, due to square surface concept.
The introduction of controlled microtrauma to affected soft tissue structure causes the stimulation of a local inflammatory response. Microtrauma initiates reabsorption of inappropriate fibrosis or excessive scar tissue and facilitates a cascade of healing activities resulting in remodeling of affected soft tissue structures. Adhesions within the soft tissue, which may have developed as a result of surgery, immobilization, repeated strain or other mechanisms, are broken down, allowing full functional restoration to occur.