The Orthobullets Podcast Shoulder & Elbow | Lateral Ulnar Collateral Ligament Injury (PLRI)
Jun 13, 2025
Explore the complexities of lateral ulnar collateral ligament injuries in the elbow. Discover the causes, diagnosis, and cutting-edge treatment options available. The discussion includes vital anatomical insights and effective examination methods. Surgical techniques are highlighted, ensuring a solid understanding of clinical management for this prevalent injury.
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PLRI Mechanism and Definition
- Lateral ulnar collateral ligament injury causes posterolateral subluxation of the radial capitellar and ulnohumeral joints.
- It often results from traumatic elbow dislocation involving supination, valgus stress, and elbow extension.
PLRI Pathophysiology
- PLRI results from a combination of loading, forearm supination, valgus or posterolateral stress, and elbow extension.
- It causes progressive failure of the LCL complex and anterior capsule, leading to radial head subluxation.
LUCL Anatomy and Role
- The lateral collateral ligament complex includes the accessory lateral collateral, annular ligament, lateral radial collateral ligament, and lateral ulnar collateral ligament.
- The LUCL is the primary stabilizer against varus and external rotation stress at the elbow.