Faculty

John M. Tokish, M.D.

Clinical Studies

Immunoregulatory Factor Analysis in Platelet Rich Plasma (PRP) for Patients with Knee Osteoarthritis (OA) Scottsdale/Phoenix, Ariz.
The purpose of this study is to investigate the correlation between a patient’s complete blood count with differential (CBC w/diff), platelet count, platelet-rich plasma (PRP) blood and platelet counts with a patient’s clinical outcome from a PRP injection for the treatment of knee osteoarthritis (OA).
The effect of oral Protocatechuic Acid (PCA) as a prophylaxis against c. acnes wound colonization during total shoulder arthroplasty. Scottsdale/Phoenix, Ariz.
The purpose of this study is to determine whether a preoperative oral course of the nutritional supplement PCA can result in the decrease in C. acnes positive cultures and bacterial load seen at the time of elective primary Total Shoulder Arthroplasty (TSA).
Total Shoulder Arthroplasty Multi-Center Registry Scottsdale/Phoenix, Ariz.
The purpose of the study is a multi-center prospective registry to collect clinical outcomes of anatomic and reverse total shoulder arthroplasty.

Open Versus Arthroscopic Stabilization of Shoulder Instability With Subcritical Bone Loss: The OASIS Trial (OASIS) Scottsdale/Phoenix, Ariz.
The purpose of this study is to investigate the effects of three surgical procedures and the associated post-operative rehabilitation to optimize time to return to military duty, work and sports, and patient-reported physical function for military personnel and civilians with traumatic anterior shoulder instability and 10-20% glenoid bone loss.

CT Assessment of Glenohumeral Subluxation with Differences in Arm Position Jacksonville, Fla., Scottsdale/Phoenix, Ariz.
The purpose of this study is to detect whether arm rotation (pronation vs. supination) affects glenohumeral alignment. If so, does this impact what prosthesis would be used for a shoulder arthroplasty?
Operative Versus Non-Operative Treatment for Atraumatic Rotator Cuff Tears: A Multicenter Randomized Controlled Pragmatic Trial Scottsdale/Phoenix, Ariz.
The purpose of this study is to compare pain and function in patients undergoing operative versus non-operative treatment of atraumatic rotator cuff tears at 12 months of follow-up, and to assess effects of rotator cuff tear size and age on comparative outcomes of operative versus non-operative treatments for atraumatic rotator cuff tears.