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Related Experiment Videos

The warm knee sign--an evaluation.

D P O'Brien1, T N Walsh, H F Given

  • 1Department of Surgery, University College Hospital, Galway, Ireland.

European Journal of Vascular Surgery
|October 1, 1990
PubMed
Summary
This summary is machine-generated.

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A warm knee sign can indicate arterial occlusion in the popliteal fossa. This study found the warm knee sign to be a useful screening tool for peripheral vascular disease.

Area of Science:

  • Vascular Medicine
  • Diagnostic Imaging

Background:

  • A warm knee area is a reported sign of arterial occlusion in the popliteal fossa.
  • The clinical significance of this sign requires further evaluation.

Purpose of the Study:

  • To assess the diagnostic value of the "warm knee" sign.
  • To compare clinical and thermographic findings with arteriographic results.

Main Methods:

  • A study involving 30 patients with suspected peripheral vascular disease.
  • Clinical examination and thermography were performed on the symptomatic limb.
  • Findings were correlated with arteriographic results.

Main Results:

  • 47% of patients showed a positive clinical "warm knee" sign, while 53% showed a positive thermographic sign.

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  • High agreement (93%) was observed between clinical and thermographic findings.
  • Arteriographic findings most commonly showed occlusion or stenosis ending at the adductor hiatus in patients with a positive "warm knee" sign.

    • Conclusions:

    • The "warm knee" sign demonstrates good sensitivity (73%) and specificity (75%) for detecting arterial occlusion at the adductor hiatus.
    • This sign is valuable for initial screening of patients with peripheral vascular disease.
    • The "warm knee" sign is a proven and useful diagnostic indicator.