Produção Nacional
Revisado por pares
Ultrasound propagation through bone fractures with reamed intramedullary nailing: Results from numerical simulations
2013; Acoustical Society of America; Volume: 133; Issue: 5_Supplement Linguagem: Inglês
10.1121/1.4806604
ISSN1520-9024
AutoresFernanda Catelani, Ana Paula M. Ribeiro, Carlos Alberto V. Melo, Wagner Coelho de Albuquerque Pereira, Christiano Bittencourt Machado,
Tópico(s)Ultrasound Imaging and Elastography
ResumoLow-intensity pulsed ultrasound stimulation (LIPUS) accelerates fracture healing, enhancing the release of inflammatory mediators and subsequent bone formation. The reamed intramedullary nailing (with the same diameter of the medullary cavity) is a surgical procedure widely used in Medicine. The aim of this work was to study ultrasound propagation inside fractures with and without reamed intramedullary nailing using 2D simulations. It was used a custom-made simulation code applied to numerical models (a 4-mm thick cortical plate, a medullary cavity with radius 4 mm with and without reamed nailing, and fracture gaps varying from 1 to 3 mm). A 1-MHz emitter was positioned above fracture center, and 14 receptor transducers were uniformly placed inside fracture gap. The acquired signals were used to estimate the time-of-flight of the first arriving signal (TOF) and the energy amplitude by means of the root mean square (RMS). TOF was slightly influenced by fracture gap variations. It was observed an increase in RMS values with the presence of metal nailing, due to the reflection in the interface water-metal. The receptors placed near cortical plates received more energy (constructive interference between the direct and lateral waves). For the case of reamed nailing, ultrasound stimulation may be intensified.
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