Validity of GNRB® arthrometer compared to Telos™ in the assessment of partial anterior cruciate ligament tears

Abstract

The diagnostic value of GNRB(®) was better than Telos™ for ACL partial thickness tears.

The effect of femoral tunnel widening on one-year clinical outcome after anterior cruciate ligament reconstruction using ZipLoop® technology for fixation in the cortical bone of the femur

“…A laximetry test (GNRB arthrometer) was also performed. This method was seen as preferable to the Telos one since it provided a better sensitivity and specificity [14].…”

Objective measurements of static anterior and rotational knee laxity

“…In the 1980s, this characteristic was shown to be modified in the ACL-injured knee [72,75], but its use in the diagnosis of ACL injuries has only been recently proposed [15,76]. To further improve the diagnosis of ACL injuries, consideration of the slope is advised as it has been shown to increase the specificity of anterior and rotational knee laxity tests to 100 %.…”

“…Based on arthroscopy, it is however possible to differentiate partial tears (the antero-medial bundle being more often concerned than the posterolateral one) from complete ACL lesions presenting either as a totally resorbed ligament or as a healed remnant on the intercondylar notch or the PCL [78]. These different lesions influence the SSD observed in anterior and rotational knee laxity measurements [76,[79][80][81][82]. As such, only considering complete tears to evaluate the diagnostic performance of an arthrometer cannot reflect its true diagnostic capacity.…”

Multiscale analysis of anterior cruciate ruptures: Prospective study of 49 cases

“…The GNRB ® device used here has good reproducibility, good accuracy (0.1 mm), and is non-irradiating [19][20][21]. In the current study, knee laxity measurements helped to confirm the diagnosis of ACL rupture and were able to significantly differentiate between partial and complete ruptures.…”

“…In the current study, 72% of ruptures were detected at this threshold. Lefèvre et al [21] showed that the diagnostic value of the GNRB ® at 250 N was better than with the Telos ® for the diagnosis of partial ruptures. With a threshold of 2.5 mm at 250 N, 83% of ruptures were correctly classified.…”