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Abstract #71404 Published in IGR 18-3
Assessment of thermal effects in a model of the human head implanted with a wireless active microvalve for the treatment of glaucoma creating a filtering bleb
Schaumburg F; Guarnieri FPhysics in medicine and biology 2017; 62: N191-N203
A 3D anatomical computational model is developed to assess thermal effects due to exposure to the electromagnetic field required to power a new investigational active implantable microvalve for the treatment of glaucoma. Such device, located in the temporal superior eye quadrant, produces a filtering bleb which is included in the geometry of the model, together with relevant ocular structures. The electromagnetic field source, a planar coil, and the microvalve antenna and casing are also included. Exposure to the electromagnetic field source of an implanted and a non-implanted subject are simulated by solving a magnetic potential formulation, using the finite element method. Maximum SAR10 is reached in the eyebrow and remains within the limits suggested by IEEE and ICNIRP standards. The anterior chamber, filtering bleb, iris and ciliary body are the ocular structures where more absorption occurs. Temperature rise distribution is also obtained by solving the bioheat equation with the finite element method. Numerical results are compared with in vivo measurements obtained from four rabbits implanted with the microvalve and exposed to the electromagnetic field source.
CIMEC Centro de Investigación de Métodos Computacionales, UNL, CONICET, FICH, Predio CONICET Santa Fe "Dr. Alberto Cassano" Colectora Ruta Nac Nro 168, Km 0, Paraje El Pozo, Santa Fe, Santa Fe, 3000,ARGENTINA.
Full articleClassification:
12.8.5 Other (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
12.8.2 With tube implant or other drainage devices (Part of: 12 Surgical treatment > 12.8 Filtering surgery)
