2019 GCMAS Annual Conference

Breakfast Session #1:

Proposal of An Evolved Conventional Gait Model: The CGM2

Presenter: Fabien Leboeuf, University of Salford

Developed during the 1990s, the Conventional Gait Model (CGM), distributed as Vicon Plugin gait (Vicon PiG), has formed the basis of gait analysis in many clinical gait analysis services.  However, it is also associated with several shortcomings such as modelling the foot as a single rigid lever and producing data which is inadequate for musculoskeletal simulation. This breakfast session aims to propose an evolved conventional gait model, called CGM2. To clarify application of CGM2, we quantified the difference due to improvement and assessed the reliability of the CGM2.

The CGM2 addresses the main limitations of Vicon PiG whilst using the same marker set to ensure backward compatibility. The CGM2 might give new insights in gait analysis through the application of a simple two segments foot model and enabling adequate outputs for musculoskeletal simulations.


Session Outline

  1. Need for an updated conventional gait model
  2. Detailed CGM2 model description, highlighting the differences between it and conventional gait model and PiG implementation of said model.
  3. Present results shown in your abstract regarding preliminary repeatability and validation of the CGM2 model
  4. Describe goals and current status of CGM2.I Project
  5. Why being “… open and transparent…” in model development is essential
  6. Described how experienced users of the conventional gait model can contribute to the CGM2.I project
    • How can users help with validation
    • How sharing data and sharing code advances the goal of the project
    • How one would propose a case study
  7. Describe how non-Vicon users presently using a form of the conventional gait model can participate in the CGM2.I project.


Breakfast Session #2:

A Review of Current Gait Lab Reimbursement

Chris Church, Nemours duPont Hospital for Children
Jean Stout, Gillette Children’s Specialty Healthcare
Sylvia Ounpuu, Connecticut Children’s Hospital
Sandi Dennis, Children’s Hospital Los Angeles
Robert Hulbert, Children’s Hospital Colorado

Insurance reimbursement continues to be a challenge for clinical motion analysis laboratories in the United States. Representatives from five clinical motion labs will present an update on the current state of insurance reimbursement for patient testing. We will review the following:

  1. CPT (Current Procedural Terminology) codes will be reviewed for standard motion analysis testing and new developments including sports and activity monitoring.
  2. Current Policies from major insurance companies will be reviewed regarding gait analysis.
  3. Current reimbursement percentages and approval rates will be provided.
  4. Methods of achieving improved approval rates will be discussed.


Breakfast Session #3:

Clinical Practice Guideline: The Use of Instrumented Gait Analysis for Children with Cerebral Palsy and Other Neuromuscular & Musculoskeletal Conditions


Amy Bodkin, Children’s Hospital Colorado
Joseph Krzak, Midwestern University; Shriners Hospital for Children - Chicago

This presentation will update the GCMAS membership on the progress of the Instrumented Gait Analysis Clinical Practice Guideline (CPG) that is being sponsored by the Academy of Pediatric Physical Therapy of the American Physical Therapy Association. Stakeholders, especially GCMAS and its membership, are important to ensure the CPG is relevant.

The Guideline Development Group (GDG) conducted an online needs assessment in 2018 to help determine the scope, focus and contents of the CPG. GCMAS members were invited to participate in the survey. The results will be discussed in this presentation. Another activity the GDG completed in 2018 was a preliminary literature review and classification of the type and number of articles published on instrumented gait analysis.

Upcoming GDG activities include: establishing an advisory board; completing a scoping review of the literature; developing PICO questions; and a systematic review of the literature. GCMAS members can be involved in the CPG development by volunteering to critically appraise and extract data from selected articles. Another opportunity for involvement is providing input to the initial draft of the CPG.

There will be opportunity for discussion and questions during this session.