CUED Publications database

Modelling of Brain Deformation After Decompressive Craniectomy.

Fletcher, TL and Wirthl, B and Kolias, AG and Adams, H and Hutchinson, PJA and Sutcliffe, MPF (2016) Modelling of Brain Deformation After Decompressive Craniectomy. Ann Biomed Eng, 44. pp. 3495-3509.

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Hyperelastic finite element models, with either an idealized cylindrical geometry or with realistic craniectomy geometries, were used to explore clinical issues relating to decompressive craniectomy. The potential damage in the brain tissue was estimated by calculating the volume of material exceeding a critical shear strain. Results from the idealized model showed how the potentially damaged volume of brain tissue increased with an increasing volume of brain tissue herniating from the skull cavity and with a reduction in craniectomy area. For a given herniated volume, there was a critical craniectomy diameter where the volume exceeding a critical shear strain fell to zero. The effects of details at the craniectomy edge, specifically a fillet radius and a chamfer on the bone margin, were found to be relatively slight, assuming that the dura is retained to provide effective protection. The location in the brain associated with volume expansion and details of the material modeling were found to have a relatively modest effect on the predicted damage volume. The volume of highly sheared material in the realistic models of the craniectomy varied roughly in line with differences in the craniectomy area.

Item Type: Article
Uncontrolled Keywords: Brain injury FE analysis Neurosurgery Brain Decompressive Craniectomy Humans Models, Neurological Shear Strength Skull
Divisions: Div C > Biomechanics
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:33
Last Modified: 19 Jul 2018 06:27