Damages to stent stabilized left ventricular pacemaker electrodes during simulated lead extraction
Journal Title: Frattura ed Integrità Strutturale - Year 2011, Vol 5, Issue 16
Abstract
During biventricular pacemaker implantation stents can be applied for coronary sinus lead stabilization to prevent lead dislocations. A lot of issues have been raised in connection with the use of the stent. In some cases the implanted left ventricular lead must be explanted. It is crucial to avoid any injury to the heart when the electrode is removed. Another very important question concerns the type of injuries the electrode may cause during the removal process. An extraction model has been prepared using a special curve and a polymer tube. After the pacemaker leads were extracted, various microscopic examinations were executed. The findings may to make such intervention methods more successful, helping to better stabilize the electrode and to keep injuries during interventions to a minimum.
Authors and Affiliations
Romola Laczkò, Tibor Balzs, Eszter Bognàr, Jànos Ginsztler
Study of short cracks under biaxial fatigue
In this paper a methodology for evaluating crack initiation under biaxial conditions is presented. The methodology consists of evaluating the crack length automatically with digital processing of highmagnification...
Crack growth threshold under hold time conditions in DA Inconel 718 – A transition in the crack growth mechanism
Aeroengine manufacturers have to demonstrate that critical components such as turbine disks, made of DA Inconel 718, meet the certification requirements in term of fatigue crack growth. In order to be more re...
Estimating macro-, micro-, and nano-hardness of metallic materials from elasto-plastic finite element results
This paper summarises an attempt of estimating macro-, micro-, and nano-hardness of metallic materials through conventional elasto-plastic finite element (FE) analyses. In more detail, to verify if the classical FE...
Numerical study of fracture arrest on snow cover
Under the hypothesis of a perfectly brittle phenomenon, avalanche triggering can be investigated numerically by means of Linear Elastic Fracture Mechanics (LEFM). Since, however, the real phenomenon is intrinsically dyna...
Estimation of the crack propagation direction in a mixed-mode geometry via multi-parameter fracture criteria
The presented work introduces a numerical parametric study on the crack propagation direction under mixed-mode conditions (mode I + II). It is conducted for the geometry of an eccentric asymmetric fourpoint bendi...