Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: narzędzie medyczne

Sortuj według:

Ogranicz wyniki do:

Narzędzie do usuwania skrzepów krwi

Jemielniak Krzysztof

Mechanik

2020

R. 93, nr 4

Skrzepy krwi zatykające tętnice mogą powodować udary niedokrwienne mózgu. Od 2015 r. standardową procedurą leczenia udarów jest mechaniczne usuwanie skrzepów (trombektomia). W artykule omówiono nową konstrukcję narzędzia do trombektomii i wynik badania jego wykorzystania.

Numerical modelling of structure and mechanical properties for medical tools

Jeziorski L., Jasinski J., Lubas M., Szota M., Lacki P., Stodolnika B.

Journal of Achievements in Materials and Manufacturing Engineering

2007

Vol. 24, nr 1

237-244

Purpose: In order to design forceps and bowl cutter property, it is necessary to optimise many parameters and consider the functions, which these medical tools should fulfil. Of course, some simplifications are necessary in respect of calculation methodology. In the paper a solution procedure concerning this problem has been presented. The presented solution allows for precise determination of the geometrical dimensions according to the functional requirements that forceps should fulfil. The presented numerical analysis describes a small range of the forceps application but the used algorithm can be applied in any other type of forceps. Also in the paper, the numerical simulation results of the bowl cutter being loaded are presented. Residual stress distribution on the tool surface is presented. A position of the cutting edges and holes carrying away the bone chips is shown as a polar diagram. Design/methodology/approach: The numerical analysis was carried out using ADINA software, based on the finite element method (FEM). In the paper some fundamental construction problems occurring during the design process of the forceps and bowl cutter have been discussed. Findings: The iteration procedures in order to optimize the basic construction parameters of the medical tools (forceps and bowl cutter). The calculations allow for determination of the geometrical parameters with reference to the expected spring rate. The charts elaborated on the basis of the calculations are very useful during a design process. The numerical calculations show an essential problem, namely a change in contact surface as a function of load. The observed phenomenon can affect the functioning of the forceps in a negative way. The numerical simulation make it possible to obtain the suitable geometry, better material properties and the instructions heat treatment of these tools. Research limitations/implications: These research was carried out in order to improve ergonomics, mechanical properties and work condition of medical tools. For bowl cutter was improve geometrical sharp and distribution of cutting holes. Originality/value: This paper presents conception to obtain new medical tools, after optimizing the basic construction parameters by numerical calculations. The prepared model could be a helpful for engineering decisions used in the designing and producing forceps and bowl cutter.