Reliability of a navigation system for intra-operative evaluation of antero-posterior knee joint laxity

Nicola Lopomo, Simone Bignozzi, Sandra Martelli, Stefano Zaffagnini, Francesco Iacono, Andrea Visani, Maurilio Marcacci

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Background: The purpose of this study was to investigate about the reliability of measuring antero-posterior laxity within-subjects for in-vivo studies using a navigation system. Methods: The analysis was performed by enroling 60 patients undergoing anterior cruciate ligament ACL reconstruction, and assessing AP laxity during the Lachman and drawer tests. Results: For the navigation system standard deviation for intra-trial measures was 0.7 mm, thus the intra-trial repeatability coefficient was 2.2 mm; standard deviation for intra-trial measure was 1.2 mm, while the reference inter-trial repeatability coefficient between expert surgeons was 3.4 mm. Conclusions: In conclusion, this study suggests that KIN-Nav may represent a new method to measure and document AP laxity intra-operatively with improved accuracy and test the effect of surgical treatment in-vivo with higher sensitivity than in the past and this study quantify its reliability for within-subjects studies performed by a single expert surgeon.

Original languageEnglish
Pages (from-to)280-285
Number of pages6
JournalComputers in Biology and Medicine
Volume39
Issue number3
DOIs
Publication statusPublished - Mar 2009

Fingerprint

Joint Instability
Knee Joint
Navigation systems
Anterior Cruciate Ligament Reconstruction
Ligaments
Surgeons
Therapeutics

Keywords

  • ACL lesion
  • Arthrometer
  • KIN-Nav
  • Knee laxity
  • Navigation systems
  • Rolimeter

ASJC Scopus subject areas

  • Computer Science Applications
  • Health Informatics

Cite this

Reliability of a navigation system for intra-operative evaluation of antero-posterior knee joint laxity. / Lopomo, Nicola; Bignozzi, Simone; Martelli, Sandra; Zaffagnini, Stefano; Iacono, Francesco; Visani, Andrea; Marcacci, Maurilio.

In: Computers in Biology and Medicine, Vol. 39, No. 3, 03.2009, p. 280-285.

Research output: Contribution to journalArticle

Lopomo, Nicola ; Bignozzi, Simone ; Martelli, Sandra ; Zaffagnini, Stefano ; Iacono, Francesco ; Visani, Andrea ; Marcacci, Maurilio. / Reliability of a navigation system for intra-operative evaluation of antero-posterior knee joint laxity. In: Computers in Biology and Medicine. 2009 ; Vol. 39, No. 3. pp. 280-285.
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