Functional properties of polyurethane ureteral stents with PLGA and papaverine hydrochloride coating

Despite the obvious benefits of using ureteral stents to drain the ureters, there is also a risk of complications from 80-90%. The presence of a foreign body in the human body causes disturbances in its proper functioning. It can lead to biofilm formation on the stent surface, which may favor the development of urinary tract infections or the formation of encrustation, as well as stent fragmentation, complicating its subsequent removal. In this work, the effect of the polymeric coating containing the active substance-papaverine hydrochloride on the functional properties of ureteral stents significant for clinical practice were assessed. Methods: The most commonly clinically used polyurethane ureteral Double-J stent was selected for the study. Using the dip-coating method, the surface of the stent was coated with a poly(D,L-lactide-glycolide) (PLGA) coating containing the papaverine hydrochloride (PAP). In particular, strength properties, retention strength of the stent ends, dynamic frictional force, and the fluoroscopic visibility of the stent during X-ray imaging were determined. Results: The analysis of the test results indicates the usefulness of a biodegradable polymer coating containing the active substance for the modification of the surface of polyurethane ureteral stents. The stents coated with PLGA+PAP coating compared to polyurethane stents are characterized by more favorable strength properties, the smaller value of the dynamic frictional force, without reducing the fluoroscopic visibility.Web of Science2214art. no. 770

Kinesiotherapy using mobile spine distractor

W artykule opisano urządzenie oraz sposób jego wykorzystania w kinezyterapii osób z problemami kręgosłupa. Dystraktor mobilny jest propozycją innowacyjnego urządzenia poprawiającego mobilność kręgosłupa oraz wzmacniającego fizyczną kondycję mięśni odpowiedzialnych za stabilizację kręgosłupa w odcinku piersiowo - lędźwiowym. Urządzenie jest przedmiotem pracy dyplomowej magisterskiej realizowanej w Katedrze Mechaniki Stosowanej.The topic of this project is mobile spine distractor, a device used to support rehabilitation of patients willing to strengthen abdominal and paraspinal muscles. This device should by cheap, with simple construction and easy in assembling and disassembling. Distractor was designed by a student of Silesian University of Technology in Gliwice as a part of his M.Sc. thesis

Magnetic Properties of Thin Film with S = 1

Blume-Emery-Griffiths model with single-ion anisotropy and biquadratic interactions has been applied for the description of thin magnetic films with S=1. According to the Bogolyubov minimization principle, in the frame of molecular field approximation, the phase diagrams, magnetizations and quadrupolar moments in thin films have been calculated

Numerical analysis of the impact load on the deformation of the chest

Resuscytacja jest zbiorem metod mających na celu zahamowanie i odwrócenie procesu umierania. Przywrócenie krążenia krwi odbywa się poprzez zewnętrzny masaż serca. Polega on na rytmicznym uciskaniu ściany klatki piersiowej. Źle zlokalizowana, lub zbyt duża siła nacisku może spowodować złamanie żeber, co w konsekwencji prowadzić może do uszkodzenia narządów wewnętrznych. W pracy podjęto próbę analizy stanu naprężeń klatki piersiowej, podczas masażu serca, dla pacjenta z lejkowatą klatką piersiową.Resuscitation is a set of methods to curb and reverse the dying process. Restoration of blood circulation is done by external cardiac massage. It consists of applying rhythmic pressure to the chest wall. However, if poorly located, or used with too much force, it can cause the fracture of ribs, which in turn can lead to damage to internal organs. The paper attempts to analyze the stress state of the chest during chest compressions for a patient with a funnel chest

Kinesiotheraphy of children with faulty lower limbs using interactive device

W artykule przedstawiono specjalistyczne urządzenie wykorzystujące system do interaktywnej rehabilitacji wad kończyn dolnych u dzieci i młodzieży. Nowoczesne rozwiązania pozwalają łączyć „przyjemne z pożytecznym”- przywrócenie sprawności grup mięśniowych w obszarze stawu kolanowego i biodrowego w trakcie gry na komputerze.Interactive device based on latest informatics technologies destined for children rehabilitation are presented in this paper. Dysfunctions of lower limbs motion system could be treated with use of the device. The rehabilitation will be carried out as unaware fun using specialized equipment during the game on the computer

Project of device for interactive rehabilitation of children with defects of upper limbs

Praca przedstawia projekt urządzenia do interaktywnej rehabilitacji dzieci z wadami kończyn górnych. Urządzenie składa się z rękawa, dwóch czujników oraz przekaźnika. W pracy zestawiono trzy propozycje rękawa oraz materiałów, które pozwoliły na wybranie optymalnego rozwiązania.This work shows project of device for interactive rehabilitation of children with defects of upper limbs. The device consists of a sleeve, two sensors and relays. The work compares the three proposals, and sleeve materials, which allowed us to select the optimal solution

Thermal Compensation Model of Magnetic Circuits with Modern Magnetic Materials

In this work a quantitative analysis of thermal compensation has been performed for a magnetic circuit producing magnetic field in the air gap. The considered system consists of Sm₃Co₁₇ type permanent magnet (as a source of magnetic field), nanocrystalline FINEMET alloy (as ultra-soft magnetic medium) and Fe-Ni low Curie temperature compensative material (as a magnetic shunt). Distribution of magnetic field induction in the circuit has been calculated numerically within standard one-dimensional approximation, considering nonlinearities of compensative material as well as demagnetization susceptibility of permanent magnet. It has been theoretically predicted, that an appropriate choice of the compensative element thickness improves significantly thermal stability of magnetic field in the air gap

Model of Anisotropic Electrical Resistivity in Rough Thin Films

In this work a new model of electrical resistivity is proposed in order to study the relationship between surface roughness geometry and thin films resistivity. The model is based on the numerical dynamic averaging of electron mean free path over whole simulated structure of rough film. For current-in-plane configuration the resistivity increases with decreasing film thickness faster than for current-perpendicular-to-plane one. Our simulations showed that big roughness depth and fine in-plane spatial period of roughness are crucial factors increasing the resistivity of ultrathin metallic layers

Project of interactive rehabilitation toy for children

W artykule opisano urządzenie służące do rehabilitacji dzieci z zaburzeniami propriocepcji, kinestezji oraz równowagi. Urządzenie ma wspomagać leczenie tych zaburzeń poprzez zabawę. Obecnie na rynku brakuje tanich urządzeń tego typu. Projekt urządzenia - zabawki - został wykonany przez studentów Politechniki Śląskiej w Gliwicach.The article contains information about device which is used for rehabilitation of children with proprioception, kinesthesia and balance dysfunctions. Device is designed to help cure children by playing games on PC. Nowadays there are weary few cheap devices like that. Project of the device - toy - was made by students of Silesian University of Technology

Magnetic Properties of Thin Film with S=1. Isothermal Susceptibility and Magnetic Specific Heat

The thermodynamic response functions were studied in thin films in the frame of the Blume-Emery-Griffiths model. The method is based on the analysis of the Gibbs free energy and involves calculations of the magnetization and quadrupolar moment distributions. The temperature dependencies of the susceptibility and specific heat are obtained for various biquadratic interaction parameter and non-zero single-ion anisotropy. The behaviour of these functions in different phases: ferromagnetic, paramagnetic and staggered quadrupolar are illustrated in figures and discussed