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Ankle arthrography and chronic lateral ankle instability

Y M Cheng1, P J Huang, Y C Fu

  • 1Department of Orthopaedic Surgery, Kaohsiung Medical College, Taiwan, Republic of China.

The Kaohsiung Journal of Medical Sciences
|April 29, 1998
PubMed
Summary
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Ankle arthrography is a reliable diagnostic tool for chronic ankle instability, showing high accuracy in identifying ligament tears. This imaging technique can aid surgeons in making crucial decisions, even when other methods yield negative results.

Area of Science:

  • Orthopedic Surgery
  • Diagnostic Imaging

Background:

  • Chronic ankle instability often requires surgical intervention.
  • Accurate preoperative diagnosis is crucial for successful surgical reconstruction.

Purpose of the Study:

  • To evaluate the diagnostic reliability of ankle arthrography in patients with chronic ankle instability undergoing surgical reconstruction.
  • To compare arthrographic findings with operative findings.

Main Methods:

  • Retrospective review of 65 ankle arthrograms from patients who had surgery for chronic ankle instability between 1987 and 1995.
  • Comparison of arthrographic findings (definite positive and "suspectable positive" tear-drop extravasation) with intraoperative findings.

Main Results:

  • 15 cases (23.1%) showed definite positive arthrographic findings.

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  • 50 cases (76.9%) exhibited "suspectable positive" findings (tear-drop dye extravasation), with only one false positive correlating to normal ligaments.
  • Overall, ankle arthrography demonstrated high concordance with operative findings.

    • Conclusions:

    • Ankle arthrography is a relatively reliable imaging modality for diagnosing chronic ankle instability.
    • The "suspectable positive" finding of tear-drop extravasation is highly indicative of ligamentous injury.
    • Arthrography can be a valuable reference tool and may assist surgical decision-making, especially when other diagnostic methods are inconclusive.