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Chemical composition of explanted deteriorated nephrostomy polyurethane-catheters through X-ray photoelectron spectroscopy
Materials Chemistry and Physics  (IF4.778),  Pub Date : 2020-01-01, DOI: 10.1016/j.matchemphys.2019.121979
María Fernández-Grajera, Margarita Hierro-Oliva, Luis Fernández-de Alarcón, Amparo M. Gallardo-Moreno

Abstract Ureteral catheters are a fundamental part of the modern urologist's armamentarium. X-ray photoelectron spectroscopy (XPS) was used for the first time as a powerful analytical tool for the study of the chemical composition of nephrostomy catheters retrieved from patients who had undergone nephrostomy to detect their chemical deterioration inside the human body. Depth profile analysis provided not only the composition of the surface but also that of the catheter bulk. The results obtained by XPS showed the presence of calcium and other ions, such as phosphorus, sulphur and fluorine in the explanted deteriorated catheters. The detection of barium on the surface of all the retrieved catheters has special relevance. This chemical element is usually incorporated as a radiomarker in the catheter polymeric matrix and its diffusion from the bulk material to the surface must be responsible for its XPS detection. The accumulation of high levels of this element from toxic barium salts in cases of urine drainage failure could lead to its adsorption from the surrounding tissues into the patient's body, thus compromising the safety concentrations of this soft alkaline earth metal.