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

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

Abstract

The main goal of this study was to compare the results of the GNRBÒ arthrometer to those of TelosTM in the diagnosis of partial thickness tears of the anterior cru- ciate ligament (ACL).

Methods A prospective study performed January– December 2011 included all patients presenting with a partial or full-thickness ACL tears without ACL recon- struction and with a healthy contralateral knee. Anterior laxity was measured in all patients by the TelosTM and GNRBÒ devices. This series included 139 patients, mean age 30.7 ± 9.3 years. Arthroscopic reconstruction was performed in 109 patients, 97 for complete tears and 12 single bundle reconstructions for partial thickness tears. Conservative treatment was proposed in 30 patients with a partial thickness tear. The correlation between the two devices was evaluated by the Spearman coefficient. The optimal laxity thresholds were determined with ROC curves, and the diagnostic value of the tests was assessed by the area under the curve (AUC).

Results The differential laxities of full and partial thick- ness tears were significantly different with the two tests. The correlation between the results of laxity measurement with the two devices was fair, with the strongest correlation between TelosTM 250 N and GNRBÒ 250 N (r = 0.46, p = 0.00001). Evaluation of the AUC showed that the informative value of all tests was fair with the best results with the GNRBÒ 250 N: AUC = 0.89 [95 % CI 0.83–0.94]. The optimal differential laxity threshold with theGNRBÒ 250 Nwas2.5 mm(Se = 84 %,Sp = 81 %). Conclusion The diagnostic value of GNRBÒ was better than TelosTM for ACL partial thickness tears.

Level of evidence Diagnostic study, Level II. Keywords GNRBÒ Anterior cruciate ligament 

 

Docteur Nicolas LEFEVRE, Docteur Yoann BOHU, Docteur Shahnaz KLOUCHE , Docteur Serge HERMAN. - 29 mars 2014.

Conflits d'intérêts : l'auteur ou les auteurs n'ont aucun conflits d'intérêts concernant les données diffusées dans cet article.

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