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Communication Dans Un Congrès Année : 2014

Does the calcaneus morphology have an influence on the risk of posterior heel ulcer?

Résumé

Most posterior heel ulcers are the consequence of inactivity and prolonged time lying down on the back. They appear when pressures applied on the heel create high internal strains and the soft tissues are compressed by the calcaneus. It is therefore important to monitor those strains to prevent heel pressure ulcers. Using a biomechanical lower leg model, we propose to estimate the influence of the patient-specific calcaneus shape on the strains within the foot and to determine if they can lead to ulcers. The model is composed of a 3D Finite Element mesh representing the soft tissues, separated into four Neo Hookean materials with different elasticities: skin, fat, Achilles' tendon, and muscles. Bones are modelled as rigid bodies attached to the tissues. Simulations provided by 18 patient-specific models demonstrate the influence of the calcaneus shape on the possibility of pressure ulcer creation. Furthermore, the models confirm the influence of the cushion on which the leg rests: a softer cushion leading to lower strains, it has less chances of creating a pressure ulcer. This patient-specific strain estimation could consequently be used for the prevention of heel ulcer when coupled with a pressure sensor.
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Dates et versions

hal-01062634 , version 1 (10-09-2014)

Identifiants

  • HAL Id : hal-01062634 , version 1

Citer

Vincent Luboz, Antoine Perrier, Marek Bucki, Bruno Diot, Francis Cannard, et al.. Does the calcaneus morphology have an influence on the risk of posterior heel ulcer?. EPUAP'2014, 2014, Stockholm, Sweden. pp.26. ⟨hal-01062634⟩
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