Estudo do fluorelastômero Viton utilizado para revestimento da ponteira dos equipamentos endoscópicos.

Abstract

Biomaterial is a term used to indicate the materials constituting the parts of medical implants, extracorporeal devices, disposable and which have been used in medicine as well as in all aspects of patients' health. The applications of biomaterials are many and varied, ranging from extended use devices such as artificial valves and veins, the devices exams such as endoscopes. Endoscopy, which means looking inside, it is a medical specialty that uses a device called endoscope for diagnosis and treatment of diseases. By endoscopy can be diagnosed illnesses, perform biopsies of lesions, extracting foreign bodies, perform dilations, do follow ups after surgery, spend probes or catheters, to treat bleeding, remove polyps and access to the surgical procedures biliary. Flexible endoscopes have in your flexible rubber tip one known as Viton® fluoroelastomer. The fluoroelastomers are synthetic fluorinated elastomers, known as Rubber Fluorinated services to high temperatures and chemically aggressive environments. Based on the above this work was to study the Viton® fluoroelastomer coating used on tips of endoscopic equipment. Three groups of samples from the tips of endoscopes consist of Viton® called L, M and P, in its virgin form and treated with HCl and ethyl alcohol, both concentrated where these samples were characterized by Optical Microscopy (OM), Electron Microscopy Were Verified (SEM), Spectroscopy in the Region of Fourier Transform Infrared (FTIR) Spectroscopy Energy Dispersive X-ray (EDS), diffraction (XRD), test of Angle Wettability and Cytotoxicity Assay rays. It was found for all samples (L, M, P) and a surface irregular with granular morphology, presence of contaminants and imperfections, characteristic bands of fluoroelastomers, typical XRD of amorphous elastomers, hydrophilic, and toxicity in cell except for M. In the sample was observed that treatment with ethanol did not cause structural changes in the fluoroelastomer as scavenger only surface impurities. Treatment with HCl caused changes in the morphology and chemical structure of the elastomer. There was a need to adapt the production of fluoroelastomer route for use as a biomaterial. The use of coatings siloxanes base that can increase the life of Viton® fluoroelastomer was proposed.