Lauge Hansen Classification



- Discussion:
- theory based on reproduction of frx patterns in cadavera;
- rationale was to guide closed treatment of fractures about the ankle;
- initial position of the foot is either supination or pronation;
      - supination of foot places tension on lateral structures of ankle;
      - pronation places tension on medial structures;
- deforming force is either rotational (internal or external) or translational (abduction or adduction);
- Supination External Rotation:
- injury begins anteriorly and progresses by external rotation around ankle;
- structures that are damaged are, in order:
  - anterior tibiofibular ligament; (type I)
  - lateral malleolus (type II)
  - posterior aspect of capsule or posterior malleolus (type III)
  - medial malleolus or Deltoid Ligament (type IV)
- Pronation External Rotation:
  - frx begins on medial side of ankle, which is tightened by pronation;
  - injury progresses by external rotation around ankle w/ damage occuring from medial to lateral in mirror image of SER frx



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Monday, October 29, 2012 9:30 pm