Influence of Injury to the Kaplan Fibers in Adult and Pediatric Patients With ACL Injury

Influence of Injury to the Kaplan Fibers and Anterolateral Ligament on Anterolateral Rotatory Knee Laxity in Adult and Pediatric Patients With Anterior Cruciate Ligament Injury: A Retrospective Cohort Study

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT06002308

Enrollment

540

Registered

2023-08-21

Start date

2023-06-20

Completion date

2023-06-22

Last updated

2023-08-21

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

Conditions

ACL-injury

Keywords

Rotatory instability, Kaplan fiber injury, Anterolateral ligament, Meniscal injury, Magnetic resonance imaging, Anterior cruciate ligament

Brief summary

The goal of this \[type of study: observational study\] is to \[detect concomitant KF and ALL injury in knees with ACL injury using MRI in both adult and pediatric patients and compare the effect of KF injury and multiple risk factors (concomitant injury to the ALL, medial collateral ligament \[MCL\], or anterior, central, or posterior part of the medial or lateral meniscus) on anterolateral rotatory laxity as measured by the pivot-shift test in a clinical setting.\]. The main question \[s\] it aims to answer are: \[Does the main risk factor for a high-grade pivot shift after acute ACL injury differ between pediatric patients and adults?\] \[Does Concomitant KF injury significantly affect the pivot-shift phenomenon in pediatric patients with acute ACL injury?\] Researchers will compare \[71 pediatric patients and 469 adults\] to see if \[main risk factor for a high-grade pivot shift after acute ACL injury differs between pediatric patients and adults?\].

Interventions

OTHERAge

The retrospective study included 540 patients with primary ACL tears (71 pediatric patients and 469 adults) whose MRI examination and pivot-shift test were conducted within 14 days after injury. To detect concomitant KF and ALL injury in knees with ACL injury using MRI in both adult and pediatric patients and compare the effect of KF injury and multiple risk factors on anterolateral rotatory laxity as measured by the pivot-shift test in a clinical setting.

Study design

Observational model

COHORT

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Healthy volunteers

Inclusion criteria

* unilateral acute primary ACL tear, considered when the patient reported knee injury occurring less than 2 weeks before the examination; * bone bruising on the femoral condyles and tibial plateau identiﬁed on MRI.

Exclusion criteria

* concomitant ligament (posterior cruciate ligament and/or posterolateral complex) procedures or realignment procedures; contralateral knee injury; * previous injury or surgery affecting the ipsilateral knee; * insufficient data from the electronic medical record system; * lack of KF visualization on MRI.

Design outcomes

Primary

Measure	Time frame	Description
KF injury	3 years	concomitant KF injury or not
ALL injury	3 years	concomitant ALL injury or not
MCL injury	3 years	concomitant MCL injury or not
Medial meniscus injury	3 years	concomitant anterior, central, or posterior part of medial meniscus injury or not
Lateral meniscus	3 years	concomitant anterior, central, or posterior part of lateral meniscus injury or not

Countries

China

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026