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A practical clinical kinematic model for the upper limbs.

Jonathan J Noble1, Nicola Rd Fry1, Carly R Bingham1

  • 11 One Small Step Gait Laboratory, Evelina London Children's Hospital, Guy's and St Thomas' NHS Foundation Trust, Guy's Hospital, London, UK.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
|December 29, 2017
PubMed
Summary
This summary is machine-generated.

A new upper limb model simplifies surgical planning for elbow and wrist conditions by minimizing patient demands and data collection time. This clinically practical model accurately measures forearm supination independently, improving surgical guidance.

Keywords:
Modelling/simulation (biomechanics)biomechanical testing/analysisbiomedical instrumentationjoint biomechanicsmotion analysis systems

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Area of Science:

  • Biomechanics
  • Clinical Biomechanics
  • Surgical Planning

Background:

  • Accurate upper limb kinematic modeling is crucial for guiding surgical interventions in neurological conditions affecting the elbow and wrist.
  • Existing models often require extensive marker sets and complex data collection, increasing patient burden and potential for error.
  • Independent calculation of forearm supination is challenging due to shoulder joint center inaccuracies.

Purpose of the Study:

  • To introduce a novel, clinically practical upper limb model for surgical guidance of the elbow and wrist.
  • To minimize patient demands and data collection duration through a reduced marker set and simplified joint center definition.
  • To accurately calculate forearm supination independently of the shoulder joint center.

Main Methods:

  • Development of a novel upper limb model with minimal markers and virtual markers, avoiding functional joint centers.
  • Calculation of forearm supination by defining the forearm segment from both distal (ulna, radial wrist) and proximal (medial, lateral elbow) markers.
  • Sensitivity analysis of elbow flexion-extension angles and comparison of novel supination calculation against a standard kinematic model.

Main Results:

  • The novel model successfully calculates forearm supination independently of the humerus segment, mitigating shoulder joint center errors.
  • The method for supination calculation is comparable to clinical goniometer measurements, allowing for a reduced marker set.
  • Sensitivity analysis demonstrated the robustness of elbow flexion-extension calculations, and comparisons validated the novel supination technique.

Conclusions:

  • The introduced upper limb model offers a clinically practical and efficient solution for surgical planning in elbow and wrist conditions.
  • The independent calculation of forearm supination enhances accuracy and reduces reliance on complex shoulder modeling.
  • This approach minimizes patient burden while providing reliable kinematic data for surgical guidance.