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

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.

Study Overview

• Status: Completed
• Conditions: Knee Arthroscopy
• Intervention / Treatment: Procedure: open release

Detailed Description

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

• Study Type: Interventional
• Enrollment (Actual): 80
• Phase: Not Applicable

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 25 years to 46 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• All these patients are diagnosed as lateral patellar compression syndrome depending on clinical features, MRI and diagnostic arthroscopy.

Exclusion Criteria:

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

Study Plan

How is the study designed?

Design Details

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

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Active Comparator: Open release of lateral retinaculae; This group was treated by open release of lateral retinaculae after diagnosis of lateral compression syndrome by arthroscopy	Procedure: open release; Open release of lateral retinaculae; Other Names: Arthroscopic release
Active Comparator: Arthroscopic release of lateral retinaculae; This group was treated by arthroscopic release	Procedure: open release; Open release of lateral retinaculae; Other Names: Arthroscopic release

What is the study measuring?

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.

Collaborators and Investigators

• Sponsor: Hawler Medical University

Publications and helpful links

General Publications

• Hamawandi SA, Amin HI, Al-Humairi AK. Open versus arthroscopic release for lateral patellar compression syndrome: a randomized-controlled trial. Arch Orthop Trauma Surg. 2022 Oct;142(10):1-7. doi: 10.1007/s00402-021-03878-0. Epub 2021 Apr 7.

Study record dates

Study Major Dates

• Study Start (Actual): March 5, 2016
• Primary Completion (Actual): November 10, 2019
• Study Completion (Actual): November 25, 2019

Study Registration Dates

• First Submitted: October 13, 2019
• First Submitted That Met QC Criteria: October 15, 2019
• First Posted (Actual): October 17, 2019

Study Record Updates

• Last Update Posted (Actual): June 4, 2020
• Last Update Submitted That Met QC Criteria: June 3, 2020
• Last Verified: June 1, 2020

More Information

Terms related to this study

• Keywords: Lateral patellar compression syndrome; Arthroscopic release; Open release
• Additional Relevant MeSH Terms: Pathologic Processes; Disease; Syndrome
• Other Study ID Numbers: HMU/Sherwan5

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No