Clinical Outcomes and
Applied Research Studies

Under the direction and leadership of Dr. Samer Hasan and with contributions by Drs. Thomas Lindenfeld, Marc Galloway, and Matthew Busam our Center is a destination for patients seeking quality non-operative and operative treatment for their shoulder and elbow injuries. Our physicians are involved in cutting edge research and technological advances. Our physicians are also reviewers and editors for various print and online publications.

Current Studies:

1. Longitudinal Study of the Results of Shoulder Replacement Surgery in Patients 40 Years Old or Less: The purpose of this study is to prospectively track and evaluate the short- and long-term outcomes of shoulder replacement surgery in patients age 40 years and younger. Dr. Hasan is currently tracking 40 patients for this study and has reported the outcomes at conferences in Paris, France (2017), Las Vegas (2018), and Buenos Aires, Argentina (2019).

2. Shoulder Arthroscopy Following Shoulder Replacement Surgery: Dr. Hasan is authoring this review article with 2018-2019 sports medicine fellows Drs. Andrew Smith and David Parker. The article summarizes the current indications, techniques, and results of shoulder arthroscopy following shoulder replacement surgery.

3. Clinical and MRI Outcomes of Patients Undergoing Repair of Large and Massive Rotator Cuff Tears with Collagen Patch Augmentation: A Retrospective Cohort Study: The purpose of this study is to evaluate the clinical outcomes of collagen patch augmentation for large and massive rotator cuff tears. Dr. Hasan is currently collecting MRI data, active range of motion, complications, healing rates, and patient reported outcome measures. Results for patients who received the collagen patch augmentation will be compared to a cohort of historical patients who underwent repair of similar tears but without the use of a patch.

4. OrthoSpace Multi-Center Study on the InSpace Balloon Arthroplasty: This multi-center, randomized controlled clinical trial will evaluate the InSpace balloon arthroplasty device. Mercy Health – CincinnatiSportsMedicine and Orthopaedic Center is one of 18 sites in the United States conducting this investigational device exemption study as a requirement for FDA approval. The balloon arthroplasty is a biodegradable saline filled balloon that is inserted arthroscopically into the subacromial space in order to improve comfort and function in patients with an irreparable rotator cuff tear but who still have preserved active range of motion.

5. OrthoFix Multi-Center Study on the Efficacy of Pulsed Electromagnetic Field (PEMF) Therapy as an Adjunctive Treatment to Surgical Repair of Full-Thickness Rotator Cuff Tears: This is a randomized controlled clinical trial aimed at evaluating the effects of PEMF technology on promoting tendon to bone healing after arthroscopic rotator cuff repair.

6. American Shoulder and Elbow Surgeons (ASES) Multi-Center Young OA Study: The purpose of this prospective, multi-center study is to determine the predictors of a successful outcome following arthroscopic management of glenohumeral arthritis in younger patients.

7. American Shoulder and Elbow Surgeons (ASES) Multi-Center Massive Rotator Cuff Study: The purpose of this data repository is to create a source of higher quality clinical evidence that may inform future clinical decision making and studies regarding the eight most common treatment methods for massive rotator cuff tears.

8. Glenohumeral Shoulder Rotation and Arch of Motion in Overhead Athletes: This study is being conducted to evaluate the isolated glenohumeral rotations in overhead athletes and to correlate internal rotation deficits with a number of years of overhead sports participation.

When the Best Matters


CSMOC is an award-winning center for orthoapedic treatment in Cincinnati.


Schumaier, A., Abboud, J., Grawe, B., Horneff, J.G., Getz, G., Williams, G., Ramsey, M., Namdari, S., Romeo, A., Nicholson, G., Keener, J., Friedman, R., Yian, E., Muh, S., Delaney, R., Otto, R., Levine, W., Tokish, J.T., Kazanjian, J., Dines, J., Green, A., Paxton S., Flanagin, B., Hasan, S., Kaar, S., Miniaci, A., Cuomo, F., “Evaluating Glenohumeral Osteoarthritis: The Relative Impact of Patient Age, Activity Level, Symptoms, and Kellgren-Lawrence Grade on Decision-making”, Arch Bone Joint Surg, 2019;7(2):151-160.

Hasan, S.S., “Timing is Everything – Commentary on an article by Brian Forsythe, MD, et al.: “The Timing of Injections Prior to Arthroscopic Rotator Cuff Repair Impacts Risk of Surgical Site Infection””. J Bone Joint Surg – Am., 2019;101(8):e33.

Hasan, S.S., Levy, J.C., Leitze, Z.R., Kumar, A.G., Krupp, R.J., Harter, D.G., “Reverse Shoulder Prosthesis with a Lateralized Glenosphere: Early Results of a Prospective Multi-Center Study Stratified by Diagnosis”, J Shoulder Elbow Arthroplasty, 2019;3:1-9.

Hasan, S.S., Rolf, R.H., Sympson, A., Eten, K., Elsass, T.R. “Single Shot versus Continuous Interscalene Block for Postoperative Pain Control following Primary Shoulder Arthroplasty: A prospective randomized clinical trial”, JAAOS – Global Res Rev., 2019;3(6):p e014.

Garrigues G.E., Zmistowski, B., Cooper A.M., Green, A., ICM Shoulder Group, “Proceedings from the 2018 International Consensus Meeting on Orthopedic Infections: evaluation of periprosthetic shoulder infection”, J Shoulder Elbow Surg., 2019;28:S32-S66.

Garrigues G.E., Zmistowski, B., Cooper A.M., Green, A., ICM Shoulder Group, “Proceedings from the 2018 International Consensus Meeting on Orthopedic Infections: management of periprosthetic shoulder infection”, J Shoulder Elbow Surg., 2019;28:S67-S99.

Parker, D., Smith, A., Fleckenstein, C.M., Hasan, S.S., “Arthroscopic evaluation and treatment of complications that arise following prosthetic shoulder arthroplasty”, J Bone Joint Surg.-Reviews, 2020, in press.

Hasan, S. S. Editorial Commentary: Classic and Congruent Arc Latarjet are Equally Safe and Effective Procedures so Choose Whichever Technique Works Best in Your Hands for Your Patients. Arthroscopy, 2020, in press.

Kohrs, B. and Hasan, S.S., “Indications”, In: Reverse Shoulder Arthroplasty: A Comprehensive Case-Based Approach, SLACK Inc., submitted.

Hasan, S.S., Schwindel L.E., Fleckenstein, C.M., “Prosthetic Shoulder Arthroplasty in Patients 40 Years Old or Less: Early Outcomes Stratified by Diagnosis and Surgery”, in preparation.

American Shoulder and Elbow Society (ASES) Periprosthetic Joint Infection (PJI) Multicenter Workgroup. “Variability of culture specimen processing for suspected Shoulder periprosthetic joint infections during revision arthroplasty”, J Shoulder Elbow Surg., 2019, submitted.

Palmer, M., Fleckenstein, C.M., Levy, M.S., Hasan, S.S., “The Distribution of Shoulder Replacements among Surgeons and Hospitals is Changing over Time”, JAAOS – Global Res. Rev, 2019, under review.

Hasan, S.S., Fleckenstein, C.M., Hajjar, M., Ajayi, A., Early Outcomes and Tendon Integrity Following Arthroscopic Repair of Retracted Large and Massive Rotator Cuff Tears Augmented with a Bio-Inductive Collagen Implant. In preparation.

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When the best matters, call the Cincinnati SportsMedicine and Orthopaedic Center-Mercy Health for all your sports medicine needs.