Functional safe zone for THA considering the patient‐specific pelvic tilts: An ultrasound‐based approach

Autor: Aziliz Guezou‐Philippe, Arnaud Clave, Wistan Marchadour, Hoel Letissier, Christian Lefevre, Eric Stindel, Guillaume Dardenne
Rok vydání: 2022
Předmět:
Zdroj: The International Journal of Medical Robotics and Computer Assisted Surgery. 19
ISSN: 1478-596X
1478-5951
DOI: 10.1002/rcs.2486
Popis: The usual Lewinnek orientation for cup positioning in total hip arthroplasty is not suitable for all patients as it does not consider the patient mobility. We propose an ultrasound-based approach to compute a Functional Safe Zone (FSZ) considering daily positions. Our goal was to validate it, and to evaluate how the input parameters impact the FSZ size and barycentre. The accuracy of the FSZ was first assessed by comparing the FSZ computed by the proposed approach and the true FSZ determined by 3D modelling. Then, the input parameters' impact on the FSZ was studied using a principal component analysis. The FSZ was estimated with errors below 0.5° for mean anteversion, mean inclination, and at edges. The pelvic tilts and the neck orientation were found correlated to the FSZ mean orientation, and the target ROM and the prosthesis dimensions to the FSZ size. Integrated into the clinical workflow, this non-ionising approach can be used to easily determine an optimal patient-specific cup orientation minimising the risks of dislocation.
Databáze: OpenAIRE
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