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Wyniki leczenia wypadniecia jadra miazdzystego u psow z zastosowaniem fenestracji

100%

Ratajska-Michalczak K. , Sterna J.

nr 09

387-389

An operation dealing with prolapse of the nucleus pulposus in the thoraco-lumbar region in dachshunds was analyzed. A dorsolateral fenestration with our own modifications was applied in all the animals. The invertebral space was determined on the basis of clinical and x-rays examinations. Seventy percent of the operated dogs responded favourably to the treatment. The time between the first observable symptoms and treatment was instrumental in predicting the outcome of the operation. In all negative outcomes this time exceeded 20 days.

Numerical simulations of the pulsatile blood flow in the different types of arterial fenestrations: Comparable analysis of multiple vascular geometries

84%

Tyfa Z. , Obidowski D. , Reorowicz P. , Stefańczyk L. , Fortuniak J. , Jóźwik K.

tom Vol. 38, no. 2

228--242

In medical terms, fenestration stands for an anomaly within the circulatory system in which the blood vessel lumen is divided into two separate channels that rejoin in the distal part of this vessel. The primary objective of this research was to analyze the impact of the left vertebral artery (LVA) and basilar artery (BA) fenestrations on the blood flow characteristics in their regions and downstream, in the cerebral circulation. The geometrical data, obtained from the angio-Computed Tomography, were the basis for the generation of a 3D model in SolidWorks 2015. In order to observe the flow characteristics within the whole spatial domain, computational fluid dynamics was involved in performing simulations of the blood flow in the patient-specific arterial system (beginning with the aortic arch and finishing with the Circle of Willis). To examine the flow distribution changes resulting from altered fenestration geometries, additional models were built. The blood flow velocity, volume flow rate and shear stress distribution were analyzed within this study. It was proven that the length/size/ position of the fenestration altered the flow characteristics in different manners. The investigations showed that the patient-specific LVA, at the V3 section (extracranial part of the artery located between the spine and the skull), is not a reason of aneurysm formation. However, BA fenestration at the proximal segment might be a possible reason of future aneurysm formation. It was proven that the computational fluid dynamics tool could support medical diagnostic procedures and multivessel brain vascular disease treatment planning.