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Related Experiment Videos

The rolimeter: a new arthrometer compared with the KT-1000.

A Ganko1, L Engebretsen, H Ozer

  • 1Department of Orthopedic Surgery, Ullevål Hospital and University of Oslo, Kirkeveien 166, 0754 Oslo, Norway.

Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA
|February 9, 2000
PubMed
Summary

The Rolimeter, a new portable knee arthrometer, accurately measures anterior knee laxity in anterior cruciate ligament (ACL) deficient knees, performing similarly to the KT-1000 device.

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Area of Science:

  • Orthopedics
  • Sports Medicine
  • Biomechanics

Background:

  • Anterior cruciate ligament (ACL) deficiency is a common knee injury.
  • Accurate assessment of anterior knee laxity is crucial for diagnosis and treatment.
  • Existing arthrometers may lack portability or ease of use.

Purpose of the Study:

  • To evaluate the diagnostic accuracy and reliability of a new portable arthrometer, the Rolimeter.
  • To compare the Rolimeter's performance against the established KT-1000 arthrometer for measuring anterior knee laxity.

Main Methods:

  • The Rolimeter was used to assess anterior knee laxity in 20 normal subjects and 18 subjects with chronic ACL deficiency.
  • The KT-1000 arthrometer was used to assess the same subjects to evaluate reliability.

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  • Maximum manual force was applied by a single examiner during testing.

    • Main Results:

    • In ACL-deficient knees, the Rolimeter and KT-1000 showed no significant differences in absolute translation or side-to-side difference.
    • In normal knees, the Rolimeter showed slightly smaller translations but high correlation with the KT-1000.
    • Both devices achieved 89% sensitivity and 95% specificity in diagnosing ACL deficiency based on a 3-mm side-to-side difference.

    Conclusions:

    • The Rolimeter is a valid and reliable tool for assessing anterior knee laxity.
    • Its portability and comparable performance to the KT-1000 make it a promising device for clinical use.