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Ballottement Test

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Other Names

Ballottement Test (for Knee Effusion)
Demonstration of the Patella Ballottement Test
  • Ballottable Patella Sign
  • Ballottement Test
  • Patellar Tap

Purpose


Description

  • Patient supine with leg straight[1]
  • Examiner milks fluid from the suprapatellar pouch
  • Examiner firmly grasps just above patella with one hand
  • Examiner gently oscillates the patella, palpating for motion
  • Pushing the patella posteriorly towards the femur
  • Positive test
    • Increased motion or spongy joint feeling suggests joint effusion
  • Always compare to contralateral leg

Pathology


Evidence

  • Unknown

See Also


References

  1. Kastelein (2009) Arch Phys Med Rehabil 90(1): 82-86 [PubMed]
Created by:
John Kiel on 22 July 2019 22:55:39
Authors:
Last edited:
9 September 2023 14:30:44
Category: