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The use of accelerometer-based navigation for coronal TKA alignment: a prospective, single surgeon comparative study.

Mark Zhu1,2, Elizabeth Lindsay3, Andre Keenan4

  • 1University of Auckland, 85 Park Road, Grafton, Auckland, New Zealand. mzhu031@aucklanduni.ac.nz.

Archives of Orthopaedic and Trauma Surgery
|November 29, 2019
PubMed
Summary

This study shows that an accelerometer-based navigation (ABN) system improves total knee arthroplasty accuracy. The ABN system enhances implant alignment without extending surgical time.

Keywords:
ABNAlignmentKnee arthroplastyNavigation

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Surgical Navigation Systems

Background:

  • Accurate component positioning is crucial in total knee arthroplasty (TKA).
  • Existing methods may impact procedure time and cost.
  • A novel accelerometer-based navigation (ABN) system was developed.

Purpose of the Study:

  • To evaluate the accuracy and time efficiency of the ABN system in TKA.
  • To compare outcomes between TKA with and without the ABN system.

Main Methods:

  • Prospective study of 138 TKA patients over 5 years.
  • 110 patients used the ABN system; 28 served as controls.
  • Post-operative coronal alignment measured via radiographs; surgical time recorded.

Main Results:

  • No significant difference in BMI or surgical time between groups.
  • ABN system significantly reduced outliers in femoral alignment (p=0.009).
  • Fewer navigated patients deviated more than 3° from the target angle.

Conclusions:

  • The accelerometer-based navigation system improves accuracy in TKA.
  • The ABN system does not increase surgical time or impact workflow.
  • This technology offers a viable solution for precise TKA component placement.