Ottawa Ankle Rules - The Ottawa Ankle Rules

The Ottawa Ankle Rules

X-rays are only required if there is any pain in the malleolar zone and any one of the following:

• Bone tenderness along the distal 6 cm of the posterior edge of the tibia or tip of the medial malleolus, OR
• Bone tenderness along the distal 6 cm of the posterior edge of the fibula or tip of the lateral malleolus, OR
• An inability to bear weight both immediately and in the emergency department for four steps.

The Ottawa foot rules are for assessing whether a foot X-ray series is indicated. It states that they are indicated if there is any pain in the midfoot zone and any one of the following:

• Bone tenderness at the base of the fifth metatarsal (for foot injuries), OR
• Bone tenderness at the navicular bone (for foot injuries), OR
• An inability to bear weight both immediately and in the emergency department for four steps.

Certain groups are excluded, in particular pregnant women, and those with diminished ability to follow the test (for example due to head injury or intoxication). Several studies strongly support the use of the Ottawa Ankle Rules in children over 6 (98.5% sensitivity); however, their usefulness in younger children has not yet been thoroughly examined.