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Perseus is a gyro powered femoral axis finder, that allows surgeon to perform perfectly aligned resections with less effort and morbidity, compared to conventional instrumentation for TKA ... read more

KiRA is a medical devices for outpatient use, KiRA supportthe analysis of knee joint kinematics and dynamic laxities. Providing real-time graphics and quantitative information about test ... read more

BLU-IGS

BLU-IGS platform is tha CAS system integrating anatomical data, surgical workflows and biomechanical models to support the surgeon during major lower limb arthroplasties ... read more

To assess the relationship between the KiRA triaxial accelerometer and the KT-1000 measurements in the intact, anterior cruciate ligament (ACL) deficient, and ACL reconstructed knee joint for the quantification of the Lachman test. Moreover, the intra- and inter-examiner repeatability of the KiRA device will be determined. It was hypothesized that the side-to-side difference of the anterior tibial translation as measured by the KiRA device would be equivalent to the one measured by the KT-1000 during the Lachman test.

Methods

Sixty patients were divided into three groups and have been prospectively included in the present study. Group_A composed of 20 patients with a diagnosis of an isolated ACL tear. Group_B composed of 20 patients who underwent ACL reconstruction with a Single-Bundle Lateral Plasty (SBLP) technique with at least 20 years of follow-up. Group_C was the control group and included 20 patients with no history of ACL lesion. Lachman test has been performed at manual-maximum load on both sides, the involved and the contralateral and analyzed with the two different devices.

Results
The KiRA device in terms of side-to-side difference resulted not statistically different from the measurement of the KT-1000 arthrometer for the three study groups (n.s): Group_A: (4 ± 2 mm KiRA, 4 ± 2 mm KT1000), Group_B: (4 ± 2 mm KiRA, 4 ± 2 mm KT-1000), Group_C: (4 ± 2 mm KiRA, 4 ± 2 mm KT-1000), an excellent intra- (ICC = 0.88–0.89) and inter-examiner (ICC = 0.79) agreement was found for KiRA measurements.

Conclusion
The KiRA (I+, Italy) device offers a valid method to quantify the Lacham test.

Level of evidence
II.

(Federico Raggi, Tommaso Roberti di Sarsina, Cecilia Signorelli, Giulio Maria Marcheggiani Muccioli, Luca Macchiarola, Ilaria Cucurnia, Matteo Romagnoli, Alberto Grassi, Stefano Zaffagnini)