Ankle sprain: Difference between revisions
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==Background==
==Background==
stress tests-best done several days after injury.
*Ankle stabilization:
**Medial: Medial collateral (deltoid) ligament (tibia to talus and calcaneus)
**Lateral: Anterior/posterior talofibular, calcaneofibular ligaments
***Weaker than medial ligament; more commonly injured in sprains


anterior drawer- tests the anterior talar fibular ligament (ATFL). knee at 90 degrees, foot in relaxed position. cup heel with one hand and push on tibia posteriorly-positive is 2mm of subluxation relative to the other foot or visible dimpling of the anterior skin.
==Diagnosis==
 
*Anterior drawer test
Talar tilt- tests ATFL and calcaneofibular ligament (CFL)-in same position as above-forced inversion of foot is applied- positive if there is obvious joint laxity relative to the other side or no passive resistance to forced motion-indicates rupture of ATFL and CFL. can do with forced eversion which tests the stability of the deltiod ligament.
**Tests anterior talofibular ligament
 
**Cup heel w/ one hand and and pull anteriorly while pushing tibia posteriorly
Fibular compression: tests the tiobiofibular syndesmotic ligament. Same position as before but dorsiflex foot. squeeze tibia and fibula together 6-8 inches below knee. Positive tests if there is pain in the ankle.
*Talar tilt test
 
**Tests for combined injury of anterior talofibular and calcaneofibular ligaments
Thompson's tests- prone with knee flexed squeeze gastroc and soleus in midcalf. if no plantarflexion-torn achilles tendon.
**Inversion at the ankle causes tilting/lifting of the mortise joint


==Classification==
==Classification==
#Class I
#Class I
## mild pain,swelling can bear weight, negative stress test-
##mild pain,swelling can bear weight, negative stress test-
##Treatment = RICE and f/u in 7 days.
##Treatment = RICE and f/u in 7 days.
#Class II
#Class II
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##Treatment: rigid splint, crutches, f/u in <7 days.
##Treatment: rigid splint, crutches, f/u in <7 days.


ATFL most common ligament (80% of inversion injuries).
Eversion injuries- deltoid ligament rarely isolated tear-usually avulsion Fx of medial malleolus. syndesmotic sprains more common than deltoid injuries (and more easily missed).
 
eversion injuries- deltoid ligament rarely isolated tear-usually avulsion Fx of medial malleolus. syndesmotic sprains more common than deltoid injuries (and more easily missed).


grade 2 and 3 eversion injuries are often placed in a short leg walking cast for 6-8 weeks.
Grade 2 and 3 eversion injuries are often placed in a short leg walking cast for 6-8 weeks.


==Causes of Chronic Pain after Healing==
==Causes of Chronic Pain after Healing==

Revision as of 21:39, 16 February 2012

Background

  • Ankle stabilization:
    • Medial: Medial collateral (deltoid) ligament (tibia to talus and calcaneus)
    • Lateral: Anterior/posterior talofibular, calcaneofibular ligaments
      • Weaker than medial ligament; more commonly injured in sprains

Diagnosis

  • Anterior drawer test
    • Tests anterior talofibular ligament
    • Cup heel w/ one hand and and pull anteriorly while pushing tibia posteriorly
  • Talar tilt test
    • Tests for combined injury of anterior talofibular and calcaneofibular ligaments
    • Inversion at the ankle causes tilting/lifting of the mortise joint

Classification

  1. Class I
    1. mild pain,swelling can bear weight, negative stress test-
    2. Treatment = RICE and f/u in 7 days.
  2. Class II
    1. mod pain, swelling, difficulty bearing weight, pos ant drawer (4-14 mm), pos talar tilt (5-15 degrees)
    2. Treatment: rigid splint, crutches, <7 day f/u.
  3. Class III
    1. severe pain, unable to bear weight, lot of swelling. ant drawer >15 mm, talar tilt >15 degrees
    2. Treatment: rigid splint, crutches, f/u in <7 days.

Eversion injuries- deltoid ligament rarely isolated tear-usually avulsion Fx of medial malleolus. syndesmotic sprains more common than deltoid injuries (and more easily missed).

Grade 2 and 3 eversion injuries are often placed in a short leg walking cast for 6-8 weeks.

Causes of Chronic Pain after Healing

  1. soft tissue problems
    1. synovial impingement syndromes
    2. loose bodies in the joint
    3. proneal tendon subluxation
  2. bony problems
    1. osteochondral Fx of talar dome
    2. lateral or posterior fx of talus
    3. anterior fx of calcaneus

Syndesmotic Sprain

(High Ankle)

Diagnosis

  1. Positive squeeze test
  2. TTP distal tibiofibular joint

Treatment

  1. Treat as sprain, f/u ortho/sports
  2. possible surgical repair if refractory to conservative management

See Also

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