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. 2009 Dec;33(6):1627-31.
doi: 10.1007/s00264-008-0694-9. Epub 2008 Nov 27.

Measurement of knee joint motion using digital imaging

Damien Bennett  1 , Brian Hanratty, Neville Thompson, David Beverland
Affiliations

Measurement of knee joint motion using digital imaging

Damien Bennett et al. Int Orthop. 2009 Dec.

Abstract
in English, French

The measurement of joint motion is common practice in many aspects of orthopaedic surgery. A number of techniques and instruments have been developed for this purpose. We describe a method of recording and measuring knee joint motion using digital imaging which demonstrated high inter-observer reliability (r > 0.948) and intra-observer repeatability (r > 0.906). This technique may offer some practical advantages over other methods of measuring joint motion.

La mesure de la mobilité articulaire est une pratique habituelle en chirurgie orthopédique. De nombreux instruments peuvent être développés. Nous décrivons une méthode de la mesure de la mobilité en utilisant une imagerie digitalisée. Ces techniques montrent une importante sensibilité inter-observateur (r > 0,948) et intra observateur avec une bonne répétabilité (r > 0,906). En conclusion, cette technique est fiable, répétitive et suffisamment sure offrant un certain nombre d'avantages pratiques.

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Figures

Fig. 1
Fig. 1
Schematic of digital camera and patient positioning
Fig. 2
Fig. 2
Passive maximum flexion
Fig. 3
Fig. 3
Angular measurement using image analysis software
Fig. 4
Fig. 4
Prosthetic limb used in accuracy testing
Fig. 5
Fig. 5
a, b Digital images demonstrating the effect of skin marker movement during typical range of flexion and extension movements. The greater trochcanter skin marker (marker X) with the knee in extension (a). The new greater trochcanter skin marker (marker O) with the knee in flexion and the original marker (marker X) with the knee in extension (b)
See this image and copyright information in PMC

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