Assessing medial collateral ligament knee lesions in general practice

Area of Science:

• Orthopedics
• Sports Medicine
• Diagnostic Imaging

Background:

• Medial collateral ligament (MCL) injuries are common in traumatic knee injuries.
• Accurate diagnosis is crucial for effective patient management and treatment.
• General practitioners often encounter knee injuries, necessitating reliable diagnostic tools.

Purpose of the Study:

• To evaluate the diagnostic utility of patient history and physical examination for identifying medial collateral ligament lesions.
• To determine the combined diagnostic value of history-taking and physical examination in general practice settings.

Main Methods:

• A study included 134 patients (aged 18-65) with traumatic knee injuries presenting to general practice.
• Patients underwent history-taking, standardized physical examination, and magnetic resonance imaging (MRI).
• Logistic regression analyzed associations between clinical findings and MCL lesions, assessing diagnostic value using sensitivity, specificity, and likelihood ratios.

Main Results:

• 35 out of 134 patients had confirmed MCL lesions via MRI.
• History elements like "trauma by external force" and "rotational trauma" were associated with MCL lesions (P <.15).
• Physical exam findings "pain valgus stress 30 degrees" and "laxity valgus stress 30 degrees" showed significant association (P <.15).
• Combining specific history and physical exam elements (pain and laxity with valgus stress) improved diagnostic accuracy (LR+ 6.4).

Conclusions:

• History-taking alone offers diagnostic value for MCL lesions in traumatic knee injuries.
• Integrating specific physical examination maneuvers significantly enhances the diagnostic accuracy for MCL lesions.
• These findings support the use of combined clinical assessment in primary care for knee injuries.