Pinna Haematoma

Trauma to the ear causes the perichondrial blood vessels to rupture, resulting in the formation of a haematoma.

If left untreated, the blood supply to the underlying cartilage can become impaired, leading to avascular necrosis of the pinna. Over time, there’s fibrocartilaginous overgrowth, leading to a structural deformity = Cauliflower ear.

It should be drained within 24 hours of the injury as the underlying cartilage becomes more susceptible to infection due to the compromised blood supply.

N.B. In small haematomas, simple needle aspiration can be done, though this carries an increased risk of incomplete haematoma evacuation.

After drainage, there may be re-accumulation of the haematoma. To reduce the risk of this, a dental roll can be put on either side of the auricle to apply pressure and prevent re-filling.