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What is a high ankle sprain?

 

Unlike other ankle sprains, this injury is sustained to the tissue (ligaments) that connect the tibia and the fibula.  These are the bones that make up the lower leg (the inner bone being the tibia or shin and the outer being the fibula).

With common ankle sprains “low ankle sprains” the ligaments that are most often injured are the ones on the outside of the ankle.  These help to connect the fibula to the foot.  These ligaments are injured when someone “rolls” their ankle over.

In the high ankle sprain, there are several structures potentially damaged.  These include ligaments that connect the tibia to the fibula known as the tibfib ligaments, as well as a tissue called the interosseous membrane.  The severity of this injury often depends on how many of these structures are damaged.  The recovery time frame varies from 8 weeks to 6 months and this is why the high ankle sprain is so dreaded.

What are the symptoms of a high ankle sprain?

With a high ankle sprain there is often a minimum degree of swelling but unfortunately there tends to be more and longer lasting pain.  The pain that occurs with this type of sprain will usually occur when the ankle is turned outward and will be noticed above the ankle.  This tendency and the fact that the ligaments are above the ankle lead to the term “high ankle sprain.”  Most athletes are diagnosed with these injuries when their ankle sprain takes longer to recover than usual.  Clinical diagnosis is based on pain location, palpation, observation and a test known as the “squeeze test.”

How does one get a high ankle sprain?

The common mechanism of injury is sport and most often they occur during forceful twisting outward of the ankle.  This injury is more common in football, hockey, wrestling and soccer.  In these sports the opportunity to become tangled under another person is increased. The outward twisting motion of the ankle will cause the two bones to pull away from one another and tear the ligaments that connect them.

Another way to injure these ligaments is via hyperdorsiflexion – which means that the toes are forced toward the shin beyond their normal range.  This will occur when an athlete has his foot planted and falls or is pushed forward.  In either event the splaying (pulling apart) of the two bones causes the ligaments to tear.

How is a high ankle sprain treated?

  • When identified early a stable high ankle sprain is treated with a boot for the first 6 weeks.  Once the boot is removed, the real tough part of the recovery begins.  At this point, due to the immobilization, the joints from the ankle to the toes are very stiff.  The physiotherapy is key to restore the lost motion, strength, balance and of course to teach the athlete how to walk and run properly again.
  • If missed, the immobilization is usually absent and the ankle sprain is treated very similar to other sprains, but with a lot more patience, plenty of rehabilitation and there is often a need  for more caution on return to sport.  This caution is necessary because of the possibility of ongoing instability.
  • If the sprain is determined to be unstable, the bones of the lower leg require surgical stabilization usually via a screw.

Final thoughts on ankle sprains in general:

In my practice I hear from people that they “always sprain their ankle” or that it’s “just a sprain.”  I must make a point that the time to deal with any ankle injury is immediately!   There are many degrees of ankle sprain and as you have now read, many different types of ankle sprain.

Determining the injury type and severity will go a long way to ensure that your ankle recovers properly.  As well, just because the swelling is going away and the pain decreases, this does not imply that the ankle has healed properly.  Loss of range of motion, scar tissue and persistent instability are all complications of ankle sprains – even minor ones.