Triaxial accelerometer can quantify the Lachman test similarly to standard arthrometers

Abstract

Purpose 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.

Good Subjective Outcomes, Stable Knee and High Return to Sport after Tibial Eminence Avulsion Fracture in Children

“…Anteroposterior laxity at 30° was evaluated measuring the side-to-side difference at manual maximum using the KT-1000 Arthrometer (MEDmetric Corp., San Diego, CA, USA) [ 18 ] while the anteroposterior laxity was measured using the Rolimeter [ 19 ]. Reliability and accuracy of these arthrometers was already assessed in previous studies [ 20 , 21 , 22 ] Knee laxity was considered normal with a side-to-side difference of <3 mm, nearly normal if 3–5 mm, and abnormal if >5 mm [ 20 , 23 ]. Rotatory laxity was measured with the Kira accelerometer device (I+, Italy) [ 24 ] while performing the Pivot-Shift manoeuvre; abnormal knee laxity was considered with values >0.8 mm/s 2 [ 25 ].…”

Fixed-bearing unicompartmental knee arthroplasty provides a lower failure rate than mobile-bearing unicompartimental knee arthroplasty when used after a failed high tibial osteotomy: a systematic review and meta-analysis

“…The difference between the injured and uninjured legs was expressed in 0.5mm increments. 22,23 Quantitative assessment of the pivot shift (QPS) phenomenon, detecting the values of rotational acceleration, was performed using the KiRA accelerometer.…”

“…All the measurements were recorded following the indications previously described. 23,24 Each measurement was performed five times. Then, the maximum and minimum values were excluded, and the three remaining values were averaged and used for the analyses.…”

Graft-Preserving Arthroscopic Debridement With Hardware Removal Is Effective for Septic Arthritis After Anterior Cruciate Ligament Reconstruction: A Clinical, Arthrometric, and Magnetic Resonance Imaging Evaluation

“…The Lachman test was performed with a triaxial accelerometer (KiRA; Orthokey). 25 The KiRA device was also used by the same experienced surgeon for the pivot-shift test; a 1.9-m/s 2 side-toside difference in tibial acceleration was considered pathological. 2 The 3-T MRI evaluation at final follow-up was performed using a standard protocol of sagittal, coronal, and axial planes on T1-and T2-weighted scans.…”