Assuntos
Circulação Coronária , Anomalias dos Vasos Coronários/fisiopatologia , Neoplasias Primárias Desconhecidas/fisiopatologia , Tumores Neuroendócrinos/fisiopatologia , Tumores Neuroendócrinos/secundário , Fístula Vascular/fisiopatologia , Idoso , Angiografia Coronária , Anomalias dos Vasos Coronários/diagnóstico por imagem , Feminino , Ventrículos do Coração/fisiopatologia , Humanos , Neoplasias Hepáticas/fisiopatologia , Neoplasias Hepáticas/secundárioRESUMO
The placement of angiographic catheters into the vascular system is a routine procedure in modern clinical business. The definition of objective but not yet available evaluation protocols based on measurable physical quantities correlated to the empirical clinical findings is of utmost importance for catheter manufacturers for in-house product screening and optimization. In this context, we present an assessment of multiple mechanical and surface catheter properties such as static and kinetic friction, bending stiffness, microscopic surface topology, surface roughness, surface free energy and their interrelation. Theoretical framework, description of experimental methods and extensive data measured on several different catheters are provided and in conclusion a testing procedure is defined. Although this procedure is based on the measurement of several physical quantities it can be easily implemented by commercial laboratories testing catheters as it is based on relatively low-cost standard methods.
