Brush Test, also known under the names Stroke Test, Bulge Test or Swipe Test is an orthopedic test to assess minor knee swelling.
According to a study by Sturgill et al. (2009), this test has a substantial degree of reliability with a Kappa value of k= 0.75.
For this reason, we give this test a moderate clinical value in practice.
Agreement was scored when two raters scored the same grade or one grade apart (see below for details).
Patient is in supine lying position with the knee extended
The examiner then brushes 2-3 times over the patient’s medial knee in distal to proximal direction (toward the patient’s hip)
The examiner then brushes 2-3 times down the lateral side of the knee with the opposite hand in proximal to distal direction.
Positive Outcome: A wave of fluid floating down the medial and distal side of the knee where it bulges mediodistally indicates a joint effusion
21 OF THE MOST USEFUL ORTHOPAEDIC TESTS IN CLINICAL PRACTICE
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