Arthroscopic Trochleaplasty in Chronic Relapsing Patellar Dislocations: A Follow-up Study

• Conditions: Patellar Dislocation

• Registration Number: NCT06906419
• Lead Sponsor: Vestre Viken Hospital Trust

Brief Summary

This study aims to evaluate the long-term clinical outcomes of arthroscopic trochleoplasty in patients treated for chronic recurrent patellar dislocations. The primary objective is to assess the effectiveness of the procedure in reducing the need for re-operations and preventing recurrent instability. Secondary objectives include evaluating postoperative complications, patellofemoral pain, functional outcomes using the Kujala Anterior Knee Pain Scale (AKPS), and quality of life measured by EQ-5D-5L. This retrospective cohort study will analyze data from patient records and structured telephone interviews conducted at least one year post-surgery.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2025-03-07
• Study First Submitted QC: 2025-03-28
• Study First Posted: 2025-04-02
• Status Verified: 2025-05
• Study Start: 2025-05-01
• Last Update Submitted: 2025-05-09
• Last Update Posted: 2025-05-14
• Primary Completion: 2025-12-31
• Study Completion: 2025-12-31

Recruitment & Eligibility

• Status: ENROLLING_BY_INVITATION
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

• Patients aged 18 years and older.
• Underwent arthroscopic trochleoplasty for chronic recurrent patellar dislocations.
• Surgery performed between 2015 and 2023.
• Availability of follow-up data and consent for participation.

Exclusion Criteria

• Concurrent knee surgeries unrelated to trochleoplasty.
• Previous surgeries on the same knee.
• Other significant orthopedic conditions affecting the knee.
• Lack of follow-up data or consent.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Re-operation Rate	The investigators seek to register any re-operations from the time between the index surgery and the interview, ranging from 1 year up to 7 years postoperatively.	Proportion of patients requiring additional surgical interventions after the index surgery at our institution.

Secondary Outcome Measures

Name	Time	Method
Recurrent Instability Rate	The investigators seek to register any incidences of recurrent instability from the time between the index surgery and the interview, ranging from 1 year up to 7 years postoperatively.	Incidence of recurrent patellar dislocations post-surgery.
Postoperative Complications	The investigators seek to register any complications related to the index surgery from the time between the index surgery and the interview, ranging from 1 year up to 7 years postoperatively.	Frequency and type of complications following trochleoplasty.
Pain Assessment	At the time of the follow-up interview, which will be performed from 1 year up to 7 years postoperatively.	Numeric pain rating scale (NRS), ranging from the least pain, 0, to the worst pain imaginable, 10, during daily activities.
Patient Satisfaction	At the time of the follow-up interview, which will be performed from 1 year up to 7 years postoperatively.	Satisfaction score on a scale, ranging from 1 (very dissatisfied) to 5 (very satisfied).
Functional Outcome	At the time of the interview, which will be performed from 1 year up to 7 years postoperatively.	Kujala Anterior Knee Pain Scale (AKPS) scores assessing pain and knee function. The Kujala Score or Anterior Knee Pain Scale (AKPS) is a 13-item self-report questionnaire that assesses subjective reactions to particular activities and symptoms that are known to correlate with anterior knee pain syndrome. The AKPS is graded on a scale of 0 to 100, with 100 being the highest possible score. Lower scores reflect greater pain and disability.
EQ-5D-5L (HRQoL) scores	At the time of the follow-up interview, which will be performed from 1 year up to 7 years postoperatively.	EQ-5D-5L (HRQoL) scores evaluating general health and well-being. The descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. The patient is asked to indicate his/her health state by ticking the box next to the most appropriate statement in each of the five dimensions. This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the five dimensions can be combined into a 5-digit number that describes the patient's health state.

Trial Locations

Locations (1)

Vestre Viken HF; 🇳🇴 Drammen, Norway