An observational study in Patellar Dislocation, Anatomic Abnormality and Trochlear Dysplasia, sponsored by Peking University Third Hospital. Recruiting at 1 site in China. Open to participants aged 14 Years to 40 Years. Per ClinicalTrials.gov, last updated 2022-02-16.
Sponsored by Peking University Third Hospital · Observational
All the data of patients with patellar dislocation will be collected to evaluate the anatomic deformities. The data includes X-ray, CT, MRI examinations, medical records, and physical examination information. Finally, we correlate the anatomic deformities with clinical efficacy. To search for the risk factors that lead to patellar dislocation and influence the therapeutic effect.
41 studies on the registry are indexed under Patellar Dislocation; 9 are open to participants now.
This study's planned enrollment of 1,000 is above the median of 100 across 15 observational studies indexed under Patellar Dislocation.
Browse Patellar Dislocation studies →Peking University Third Hospital is the lead sponsor of 752 studies on the registry; 273 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Patients with patellar dislocation
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-Patients with patellar dislocation.
Exclusion Criteria:
Patients with at least one type of anatomic deformity
Other: Collect the clinical data
Patients without anatomic deformity
Other: Collect the clinical data
We analyze the influence of the anatomic deformity on the clinical efficacy at the follow-up.
Number of participants with redislocation of their patella after surgery as confirmed by clinical physical examination
We can determine patellar redislocation by physical examination. In participants with redislocation of their patella, the patella (kneecap) slips out of its normal position. Often the knee is partly bent, painful and swollen.The patella is also often felt and seen out of place. We recored the number of participants with redislocation of their patella after surgery.
Time frame: Three years after surgery
International Knee Documentation Committee(IKDC) score
The entire IKDC form, which includes a demographic form, current health assessment form, subjective knee evaluation form, knee history form, surgical documentation form, and knee examination form, may be used as separate forms. The knee history form and surgical documentation form are provided for convenience. All researchers are required to complete the subjective knee evaluation and knee examination form. Instructions for scoring the subjective knee evaluation form and the knee examination form are provided on the back of the forms. Total score 100, ≥75 being considered excellent.
Time frame: Three years after surgery
Magnatic Resonance Imaging evaluation
All patients undergoing anterior cruciate ligament reconstruction underwent MRI imaging evaluation of both knees. Use International Cartilage Repair Society(ICRS) score to evaluate, total score is 12, classified into four grades,grade Ⅰ: normal (12), grade Ⅱ: nearly normal (8-11), grade Ⅲ: abnormal (4-7), grade Ⅳ: severely abnormal (1-3).
Time frame: Three years after surgery
Skeletal force line and various angles by X-ray evaluation
X-ray was used to evaluate the skeletal force line and various angles of patients. Use Qvadriceps Angle to evaluate quadriceps force line and patellar ligament force line. The normal Angle is 18-22° for the adult standing position.Above or below this range is considered abnormal.
Time frame: Preoperative
Started Sep 2021 (actual). Primary completion is estimated for Dec 2025, 51 months after the start.
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