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Outcomes of MPFL Study

Title Outcomes of Patellofemoral Dislocation Treated with Medial Patellofemoral Ligament Reconstruction and or Repair
Therapeutic Area Dislocations
Principal Investigator Matthew Salzler MD
Gender All
Contact Nicholas O’Leary
617 636-5159


Subjects will be identified through billing searches based on CPT (27420, 27427, 29873, 27427, 27405.) and ICD-9 codes (836.3, 717.89, 717.86). We will include both skeletally mature and skeletally immature patients, but will analyze the data separately. Skeletal maturity will be determined based on an evaluation of the patient's radiographs. Potential participants will be identified from medical records then called to determine interest and inform them that they will be mailed the ICF/Assent and study questionnaires. They will then be mailed the recruitment letter, ICF, Assent form and all study questionnaires, to be returned in a provided stamped envelope. If the study team does not receive the study documents back from the patients that were sent the materials, they will be called using the submitted telephone script. They will then be mailed another packet to complete or asked to complete the one already sent if they still have it. All questionnaires and documentation of consent/assent will be written via mailed documents and a signed copy of the consent/assent will be mailed back to the participants. Participation in the study is entirely optional and if a patient chooses not to participate, it will not impact their treatment at Tufts Medical Center. Patients who provide their verbal consent will have the option to complete research questionnaires, including the VAS pain score, Kujala Score, Lysholm Knee Scale and Tegner Score. Study participation will end upon completion of surveys. Additionally we will retrospectively collect data from follow-up clinic notes including: range of motion, pain score and instability. We will also document cases of radiolocation and revisions as well as when the patient was able to resume participation in sports and to what extent.

Study Details

Inclusion Criteria

  • Medial patellofemoral ligament ruptures treated surgically

Exclusion Criteria

  • Patients or parents unable to answer the questionnaire.

Study Requirements

Questionnaires are the only requirements for the study outside of their regular standard of care.