What question did this study set out to answer?

Determine the test-retest reproducibility of anterior and posterior knee laxity measurements across three commercial devices and directly compare their numerical outputs.

November 1, 1989The American Journal of Sports Medicine

Genucom, KT-1000, and Stryker knee laxity measuring device comparisons

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Authors

CHCarl L. HighgenbotenUniversity of North Texas AJAllen JacksonUniversity of North Texas NMN. MeskeUniversity of North Texas

Discussion

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Implication

Comparative study demonstrates acceptable repeatability but device-specific knee laxity values in asymptomatic individuals, indicating measurements cannot be interchanged across instruments.

Key Points

Determine the test-retest reproducibility of anterior and posterior knee laxity measurements across three commercial devices and directly compare their numerical outputs.
Enrolled 30 asymptomatic subjects (N=30) who underwent a test-retest protocol on both knees.
Tested three commercial systems—the Genucom Knee Analysis System, MEDmetric KT-1000 Arthrometer, and Stryker Knee Laxity Tester—in a counterbalanced sequence.
Analyzed repeatability and cross-instrument consistency using analysis of variance (ANOVA) and correlational analysis.
Within-device repeatability was acceptable across all three systems, with the lowest correlation coefficient observed at r = 0.74.
Analysis revealed that each testing device produced distinct, device-specific anterior and posterior laxity values, preventing direct numerical generalization from one instrument to another.

Cite This Study

Highgenboten et al. (1989) studied this question.

synapsesocial.com/papers/6a710052f44fa9f079dec1e4 https://doi.org/10.1177/036354658901700602

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Implication

Comparative study demonstrates acceptable repeatability but device-specific knee laxity values in asymptomatic individuals, indicating measurements cannot be interchanged across instruments.