I'm trying to find quantitative measures to relate to knee stability. I've heard some gait labs use rigs specifically designed for knee stability measurements however haven't found much in the literature.
We indeed use a varus-valgus laxity chair for this, see:
1: van der Esch M, Steultjens MP, Lems WF, Dekker J. Gender difference in
varus-valgus laxity in osteoarthritis of the knee. Scand J Rheumatol. 2007
Mar-Apr;36(2):157-9. PubMed PMID: 17476627.
2: van der Esch M, Steultjens M, Knol DL, Dinant H, Dekker J. Joint laxity and
the relationship between muscle strength and functional ability in patients with
osteoarthritis of the knee. Arthritis Rheum. 2006 Dec 15;55(6):953-9. PubMed
PMID: 17139642.
3: van der Esch M, Steultjens M, Ostelo RW, Harlaar J, Dekker J. Reproducibility
of instrumented knee joint laxity measurement in healthy subjects. Rheumatology
(Oxford). 2006 May;45(5):595-9. Epub 2005 Dec 6. PubMed PMID: 16332948.
Aircast has a device called the Rolimeter (see http://www.genourob.com/de/arthrometer/7-arthrometres/44-le-rolimeter-.html) that is not very expensive and is easy to use for A-P knee laxity (i.e. drawer test). I am not sure if it would work but maybe there is a way to use it (against its dedicated purpose) for M-L laxity test.
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