The Clinical Effect of Different Lateral Retinaculum Relaxation Methods in the Treatment of LPCS

Study Overview
=================
Brief Summary
-----------------
To observe the comparison of the clinical effects of two different ways of loosening the lateral support band under arthroscopy to treat lateral patella excessive compression syndrome.

Detailed Description
-----------------
To analyze the surgical conditions of 64 patients with lateral patella excessive compression syndrome who were surgically treated by Deputy Chief Physician Yang Yuping of the Department of Sports Medicine, Peking University Third Hospital from September 2004 to January 2019. Among them, 24 early cases used the traditional proximal release of the lateral retinaculum (traditional surgical group), and recently 40 cases, after learning from the surgical experience of the early cases, switched to the lateral release of the lateral retinaculum, that is, L type Release (new surgery group). The visual analog scale (VAS), Lysholm score, and IKDC knee function subjective evaluation scale (IKDC) score were performed before and after the operation. By analyzing the knee movement scores of patients before and after surgery, the efficacy of the above two operations was judged, and the two groups of postoperative scores were evaluated.

Official Title
-----------------
The Clinical Effect of Different Lateral Retinaculum Relaxation Methods in the Treatment of Lateral Patellar Compression Syndrome

Conditions
-----------------
Lateral Patellar Compression Syndrome

Intervention / Treatment
-----------------
* Procedure: L type release surgery


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: From September 2004 to January 2019, patients with lateral patella overcrowding syndrome treated by deputy chief physician Yang Yuping of the Department of Sports Medicine, Peking University Third Hospital Exclusion Criteria: From September 2004 to January 2019, patients with lateral patella overcrowding syndrome treated by deputy chief physician Yang Yuping of the Department of Sports Medicine, Peking University Third Hospital
Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Traditional surgery group<br>Traditionally loosen the lateral support belt proximally | |
| New surgery group<br>Laterally loosen the outer support belt, that is, L-shaped loosen | Procedure: L type release surgery<br>* Lateral release of the lateral support belt<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Visual analogue scale (VAS) | VAS is used to evaluate knee function. The higher the score of VAS, the better the recovery of knee function | Six months after surgery | 
| (International Knee Documentation Committee) IKDC knee function subjective evaluation form score | IKDC score is used to evaluate knee function. The higher the score of IKDC score, the better the recovery of knee function | Six months after surgery |