Sprained Ankle - 1

Important The Ottowa Ankle Rules can save time, money and radiation - learn them.  

Introduction

Sprained ankle is a common injury, and causes significant morbidity and many workdays to be lost.The usual mechanism of injury is inversion of the foot.   


Image Inversion injury 2
 anckle1

Mechanism of injury

This puts strain on the ligaments particularly those on the lateral side of the ankle - from the end of the fibula to the talus. 

  
Image Talofibular ligaments
 ankle2

 

  Ankle fracture

Sometimes this can cause the lateral malleolus to break, as shown here with a dark line across the lateral malleolus.   


Image Ankle fracture
 ankle3

 

Sprain


More commonly however, the ligaments are sprained. This means that some of the ligaments are torn. The weakest is the anterior talofibular ligament