Lateral Patellar Compression Syndrome Clinical Trial
Official title:
Novel Method for Diagnosing Lateral Patellar Compression Syndrome Using X-ray: a Retrospective Case-Control Study
This study evaluates whether the patellar axial radiograph of lateral patellar curvature angle （LPCA）with knee flexion at 30 ° can be used as a new diagnostic surrogate of lateral patellar compression syndrome（LPCS）. We believe that the new index LPCA has high sensitivity and specificity in initial diagnosis of LPCS using axial patellar radiograph with knee flexion at 30 ° , and has high application value.
Background: A well-established reference is lacking for diagnosing lateral patellar
compression syndrome (LPCS), and this diagnosis currently depends on clinicians' subjective
judgment and several examination results. X-rays are primarily used to diagnose LPCS, but
they have low detection rates of patellar tilt using the congruence angle (CA) and patellar
tilting angle (PTA).
Purpose: To investigate whether patellar axial radiography of the lateral patellar curvature
angle (LPCA) of knee in 30° flexion can diagnose LPCS.
Methods: We enrolled 87 patients between 2016 and 2019 and divided them as per diagnosis into
three groups of 29 each: LPCS, patellar dislocation (PD, control), and meniscus tear (MT,
negative control) groups. A senior radiologist and the chief physician of sports medicine
examined their patellar axial radiographs of the knee in 30° flexion using a computer imaging
system, measuring LPCA, PTA, and CA. Univariate analysis of variance and Kruskal-Wallis H
test were used to compare measurement data with normal distribution and non-normal
distribution, respectively. Bonferroni correction was used to analyze different indicators
for different groups. The area under the curve (AUC) was calculated to verify the value of
LPCA in initial diagnosis of LPCS.
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| Status | Clinical Trial | Phase | |
|---|---|---|---|
| Completed |
NCT04958603 -
The Clinical Effect of Different Lateral Retinaculum Relaxation Methods in the Treatment of LPCS
|