arthroscopic lateral patella retinaculum releasing through/outside synovial membrane for the treatment of lateral patellar compression syndrome

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

IRCT

Registry ID

IRCT20200205046378N1

Enrollment

125

Registered

2020-02-11

Start date

2635-11-22

Completion date

Unknown

Last updated

2020-02-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Lateral patellar compression syndrome (LPCS) is a disease of musculoskeletal disorder with pathological manifestations of the increased lateral patellofemoral joint pressure, which is caused by the long-term lateral tilt of patella, the adaptive tightening of lateral patella retinaculum (LPR), and the long-term stress imbalance of medial and lateral articular surfaces. The main clinical manifestations are patellofemoral joint pain, abnormal patella trajectory and articular cartilage injury . LPC

Interventions

Intervention 1: Control group: rthroscopic LPRR either outside synovial membrane (OSM). Intervention 2: . Intervention 3: . Intervention 4: Intervention group: arthroscopic LPRR outside synovial memb

Eligibility

Sex/Gender

All

Age

16 Years to 66 Years

Inclusion criteria

Inclusion criteria: The symptoms of anterior knee pain in the unilateral knee joint were not significantly relieved after 3-6 months of standardized non-surgical treatment; Preoperative examination showed that the LPR was tightened; Imaging examination prompted the patella tilt to the outside and Q angle was normal.

Exclusion criteria

Exclusion criteria: Patients had the history of dislocation or subluxation of patella or excessive Q angle (>20°); Severe patellofemoral arthritis was not suitable for LPRR alone; Other diseases were not suitable for surgery treatment.

Design outcomes

Primary

Measure	Time frame
. Timepoint: . Method of measurement: .;Sixty six cases (23 males and 43 females) were included in the TSM group, aged 16-65 years with an average age of 48.3 years. Thirty-two cases were in the left knees and 34 cases in the right knees. The medical history was 6-29 months, with an average of 18.5 months. Thirty cases had traumatic history. Arthroscopic articular cartilage injury was assessed according to outerbridge classification [11]. Grade I-II was in 51 cases, grade III in 10 cases, and grade IV in 5 cases. Twenty one cases had meniscus injury, 10 cases synovial fold hyperplasia and 8 cases free body (Table 1).Fifty-nine cases were included in the OSM group, including 18 males and 41 females. The age ranged from 17 to 66 years, with an average age of 49.2 years. Twenty-eight cases were in the left knees and 31 cases in the right knees. The medical history was 7-29 months, with an average of 19.1 months. Twenty-seven cases had traumatic history. Outbridge classifications were as follows: Grade I-II was in 45 knee, III 8 knee, and IV 6 knee. Twenty cases had meniscus injury, 8 cases synovial fold hyperplasia and 8 cases free body (Table 1). Timepoint: before surgery. Method of measurement: gender, age, the left or right side of knee ,The medical history, cases of traumatic history. Arthroscopic articular cartilage injury assessed according to outerbridge classification [11]. cases of meniscus injury, synovial fold hyperplasia and free body (Table 1).;In the TSM group, all patients were followed up for 1.5-5 years, with an average of 3.4 years. Sixty-six patients had pain when going up and down stairs and squatting down before surgery. Anterior knee pain was significantly reduced or disappeared in all patients 1 month after surgery. In 1 year after surgery, 55 (83.3%) of the patients were able to go up and down the stairs normally and 11 cases had pain when going up and down stairs and the function was slightly limited. 51 cases of anterior knee pain were basic	—

Measure

Time frame

. Timepoint: . Method of measurement: .;Sixty six cases (23 males and 43 females) were included in the TSM group, aged 16-65 years with an average age of 48.3 years. Thirty-two cases were in the left knees and 34 cases in the right knees. The medical history was 6-29 months, with an average of 18.5 months. Thirty cases had traumatic history. Arthroscopic articular cartilage injury was assessed according to outerbridge classification [11]. Grade I-II was in 51 cases, grade III in 10 cases, and grade IV in 5 cases. Twenty one cases had meniscus injury, 10 cases synovial fold hyperplasia and 8 cases free body (Table 1).Fifty-nine cases were included in the OSM group, including 18 males and 41 females. The age ranged from 17 to 66 years, with an average age of 49.2 years. Twenty-eight cases were in the left knees and 31 cases in the right knees. The medical history was 7-29 months, with an average of 19.1 months. Twenty-seven cases had traumatic history. Outbridge classifications were as follows: Grade I-II was in 45 knee, III 8 knee, and IV 6 knee. Twenty cases had meniscus injury, 8 cases synovial fold hyperplasia and 8 cases free body (Table 1). Timepoint: before surgery. Method of measurement: gender, age, the left or right side of knee ,The medical history, cases of traumatic history. Arthroscopic articular cartilage injury assessed according to outerbridge classification [11]. cases of meniscus injury, synovial fold hyperplasia and free body (Table 1).;In the TSM group, all patients were followed up for 1.5-5 years, with an average of 3.4 years. Sixty-six patients had pain when going up and down stairs and squatting down before surgery. Anterior knee pain was significantly reduced or disappeared in all patients 1 month after surgery. In 1 year after surgery, 55 (83.3%) of the patients were able to go up and down the stairs normally and 11 cases had pain when going up and down stairs and the function was slightly limited. 51 cases of anterior knee pain were basic

—

Secondary

Measure	Time frame
Five patients had haemarthrosis in the postoperative period, and the symptomatic treatment such as puncture and drainage was improved. Three cases of joint adhesion were relieved after manual loosening. Infection, deep vein thrombosis and other complications were not observed. Timepoint: after surgery. Method of measurement: Follow up the intraoperative and postoperative complications closely.	—

Countries

China

Contacts

Public ContactTe. Li

General Hospital of Central Theater Command

260636672@qq.com+86 27 7648 7273

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 28, 2026