Open Versus Arthroscopic Release for Lateral Patellar Compression Syndrome: Comparative Study

Study Overview
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Brief Summary
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Chronic anterior knee pain with a stable patella is often associated with overload and increased pressure on the lateral facet due to pathologic lateral soft-tissue restraints. Lateral pressure in flexion is a term describing the pathologic process of increasing contact pressure over the lateral patellar facet as knee flexion progresses. Eighty patients were involved in this study, and it was divided into 2 random groups; Group A (40 patients)(odd number) were treated with open release after diagnostic arthroscopy and Group B (40 patients)(even number) were treated by arthroscopic release. All these patients are diagnosed as lateral patellar compression syndrome depending on clinical features, MRI and diagnostic arthroscopy. All patients were followed by Lysholm knee scaling score before surgery and two weeks , six weeks then 6 months after surgery.

Detailed Description
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This study was done by two orthopedic surgeons working in three hospitals from March 2016 to April 2018, Eighty patients were involved in this study, and it was divided into 2 matched groups; Group A (40 patients) were treated with open release after diagnostic arthroscopy and Group B (40 patients) were treated by arthroscopic release. All these patients are diagnosed as lateral patellar compression syndrome depending on clinical features, MRI ( figure 1)and diagnostic arthroscopy. All patients were followed by Lysol knee scaling score before surgery , two weeks , six weeks then 6 months after surgery. The two groups are matched related to age and gender. 52 patients are females and age ranged from 21-48 years. Exclusion criteria are 1. Smoking 2.Patellar instability 3. D.M 4. Knee osteoarthritis 5. Previous knee surgery 6. Knee deformities involving Varus , valgus or recurvatum 7. Ligament laxity

Official Title
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Open Versus Arthroscopic Release for Lateral Patellar Compression Syndrome: Comparative Study

Conditions
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Knee Arthroscopy

Intervention / Treatment
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* Procedure: open release


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: All these patients are diagnosed as lateral patellar compression syndrome depending on clinical features, MRI and diagnostic arthroscopy. Exclusion Criteria: Smoking Patellar instability D.M 4. Knee osteoarthritis 5. Previous knee surgery 6. Knee deformities involving Varus , valgus or recurvatum 7. Ligament laxity

Ages Eligible for Study
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Minimum Age: 25 Years
Maximum Age: 46 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Open release of lateral retinaculae<br>This group was treated by open release of lateral retinaculae after diagnosis of lateral compression syndrome by arthroscopy | Procedure: open release<br>* Open release of lateral retinaculae<br>* Other names: Arthroscopic release;|
| Active Comparator: Arthroscopic release of lateral retinaculae<br>This group was treated by arthroscopic release | Procedure: open release<br>* Open release of lateral retinaculae<br>* Other names: Arthroscopic release;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Lysholm knee scaling score | Measurement of knee pain and daily activities | All patients were followed by Lysholm knee scaling score 6 months after surgery. | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Lateral patellar compression syndrome, Arthroscopic release, Open release