Aggressiveness intravascular catheters due to the high hardness of the materials from which they are made

In city hospital conducted a study of the dynamics of the state of the body parts of the patients in the place of installation they of intravascular plastic catheters made of polyurethane, silicone and Teflon. It is shown that proper installation of high-quality catheters often causes local inflammation of the soft tissues regardless of the material from which the catheters. It was found that all modern high-quality intravascular catheters have overly pronounced mechanical traumatic action that underlies the characteristic local inflammation of the vascular wall and surrounding tissues. Invited to consider this “catheter” as an independent disease iatrogenic disease. It is established that catheter disease occurs due to excessive mechanical damage to the soft tissue by the catheter due to the high roughness of its outer surface, excessive acuteness and high elasticity of its working end that is mechanically scratch a vessel wall inside the vessel. It is established that ceteris paribus the severity of the aggressive actions of the local quality of intravascular catheters in the venous wall depends on the type of polymeric material from which the catheters. In experiments on animals found that the most pronounced effect is aggressive intravascular catheters, which are made of Teflon. In laboratory tests it was established that the aggressiveness of Teflon catheters due to the low plasticity of Teflon and a low dependence of their elastic properties on temperature. In this regard, the assumption was made that the manufacture of polymeric implantable medical devices from materials having high temperature dependence of the elastic properties that will prevent the development of “catheter” disease and ensure a safe lengthening of location of catheters inside blood vessels. Invented method of biological assessment of irritating effects of intravascular catheters and “melting” of the intravascular catheter, the working of which is a floating nipple, softens and stretchable at temperatures above +33°C.

полимерные материалы, термопластичность, упругость, заостренность, шероховатость, локальная температура, инфракрасная термография, polymeric materials, plasticity, elasticity, sharpness, roughness, local temperature, infrared thermography

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