A clinical trial evaluating the effectiveness, safety and patient tolerance for the use of Intense Therapeutic Ultrasound (ITU) for chronic, Plantar Fasciitis musculoskeletal tissue pain reduction began in August 2016 and was completed in April 2017. The clinical setting: University Foot and Ankle Institute, Santa Monica, California, USA; Single-Blinded, pivotal study for chronic plantar fasciitis.

Intense Therapeutic Ultrasound (ITU) is an established ultrasound based therapy in which sound waves are concentrated and focused into selected musculoskeletal tissue, to produce selective thermal coagulative changes over a small controlled area while leaving the surrounding tissue unaffected. These coagulative changes are known to begin the body's tissue response cascade and promote collagen generation in the targeted anatomy resulting in pain reduction.

Inclusion Criteria:

• Chronic Pain (>90 days) from previously diagnosed Plantar Fasciitis, where "Standard of Care" regimens failed to relief pain in the affected anatomy.
• No History of surgery to the affected anatomy.
• No alternative treatment procedures within the last 90 days.
• Age: 18 - 85, depending on the study.
• Unilateral Pain
• Willingness to complete treatment and post treatment regimen as described.
• Patients who have provided written and verbal informed consent.

Exclusion Criteria:

• Patients currently enrolled in any other non-conservative, device, or Investigational New Drug clinical trial, or who have participated in a clinical study involving the Plantar Fascia, thirty days prior to study initiation;
• Patients who have participated in any other clinical study involving an investigational product 30 days prior to enrollment that, in the opinion of the Principal Investigator, could affect the outcome of this study;
• Patients who have received previous treatment in the symptomatic limb (not including conservative treatment);
• At the Principal Investigator's discretion, any patient that should be excluded based on their current condition or medical history.

1 year

Any patient reported event occurring after the first treatment.

Bias was mitigated as much as possible within the protocol by way of the blinding throughout the layers of patients and personnel involved in the study.