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Review Question - QID 119

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QID 119 (Type "119" in App Search)
A 32-year-old male sustains a the injury shown in Figure A after a high-speed motor vehicle collision. Which factor has been found to have the highest direct correlation with severe heterotopic ossification after traumatic knee dislocation?
  • A

Injury Severity Score (ISS)

41%

896/2181

Glascow Coma Scale (GCS)

41%

898/2181

Timing of knee reconstruction

5%

105/2181

Number of ligaments reconstructed

6%

122/2181

Open ligament reconstruction

7%

144/2181

  • A

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Figure A shows a knee dislocation with cruciate ligament avulsion injuries. Development of significant heterotopic ossification (HO) formation has been shown to be most directly correlated to the ISS score.

Mills and Tejwani looked at multiple variables including injury severity score (ISS), Glascow coma scale (GCS), closed head injury (CHI), timing of surgery (> or < 3 weeks) and type of surgery (open vs. arthroscopic, number of ligaments reconstructed) in its relation to the formation of HO following knee dislocation. In the final group the sensitivity and specificity of the ISS in relation to HO formation was 100%, while presence of CHI had a specificity of 97%. Timing, type of surgery and approach did not influence HO formation.

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