RU2805749C1 - Echo-conductive material for imitation of soft tissues - Google Patents

Abstract

FIELD: chemistry and medicine.

SUBSTANCE: invention relates to the echo-conductive material for simulating soft tissues, containing gelatin, glycerin, polyacrylamide, dye and distilled water in the following ratio of components, wt.%: 5–10 of gelatin; 33–38 of glycerol; 6.5–11.5 of distilled water; 45–50 of polyacrylamide; 0.5 of dye.

EFFECT: using the material as a reusable base for simulating human soft tissues with the possibility of their ultrasound examination.

1 cl, 4 dwg, 1 tbl, 1 ex

Description

The invention relates to medicine, in particular to materials that imitate soft tissues in organ models, and can be used to practice puncture skills under ultrasound control.

A known composition for creating an ultrasonic-conducted soft tissue simulator material containing water, polyacrylamide and “Reamberin” (https://science-education.ru/ru/article/view?id=26921).

However, this composition is not suitable for use in reusable simulation models due to the liquid state of the base, which evaporates over time.

The closest analogue is an echo-conductive material for simulating soft tissues, containing gelatin, glycerin and distilled water (see https://cyberleninka.ru/article/n/sozdanie-modeli-trenazhyora-dlya-otrabotki-navyka-punktsii-polostnoy- sistemy-pochki-pod-ultrazvukovym-kontrolem).

However, when the nearest analogue is pierced with a puncture needle, the resulting channel does not close.

The problem to be solved by the present invention is the development of a material that can be used as a reusable base for simulating human soft tissues with the possibility of their ultrasound examination.

The technical result that is achieved in solving the problem is expressed in the production of a material with high performance characteristics and a wide range of applications, ensuring the possibility of reusable use.

The problem is solved by the fact that the echo-conductive material for simulating soft tissues containing gelatin, glycerin and distilled water differs in that it additionally contains polyacrylamide and dye in the following ratio of components, wt.%:

gelatin 5-10; glycerol 33-38; distilled water 6.5-11.5; polyacrylamide 45-50; dye 0.5.

A comparative analysis of the features of the claimed invention with the features of the prototype and analogues indicates that the proposed solution meets the “novelty” criterion.

In this case, the distinctive features of the invention provide the solution to the following functional problems.

The sign indicating that the material “additionally contains polyacrylamide” describes the type of structurant used, which helps to improve the following properties of the material:

- enhancing echogenic properties due to homogeneous polymerization of polyacrylamide, which ensures its dissolution in water and glycerin;

- increasing the ability to gel and thus ensuring elasticity, causing self-healing of punctures and the possibility of reusable use.

A sign indicating that the material “additionally contains a dye” allows you to imitate the color of adipose tissue, which improves the quality of soft tissue imitation, and also eliminates foaming during cooking.

Signs “at the following ratio of components, mass. %:

gelatin 5-10; glycerol 33-38; distilled water 6.5-11.5; polyacrylamide 45-50; dye 0.5"

describe the optimal ratio of components.

Gelatin is used as a gelling agent, giving the material a colloidal consistency, and glycerin and distilled water are used as binders for the components in the preparation of the material.

At the same time, the use of glycerin due to its hygroscopicity (the ability to absorb water from the atmosphere in an amount of up to 40% of its own weight) allows:

- obtain a dense colloidal mass sufficient to imitate human soft tissues;

- prevent the evaporation of water from the material over time and thus ensure stability of its size and shape, as well as a longer service life.

Figure 1 shows an ultrasound image when practicing the skill of puncture under ultrasound control, which depicts a section of material with an echogenic ball and needle located inside it.

Figure 2 shows a general view of the finished material.

Figure 3 shows a sample of the material:

a – immediately after production;

b – after 2 weeks of storage at room temperature and normal indoor humidity.

Figure 4 shows a sample of the material:

a – when piercing it with a needle;

b – after piercing it with a needle.

The claimed material is prepared according to standard methods using standard equipment.

Glycerin, polyacrylamide, distilled water and dye (for example, produced by the Yaloga-NT company) are mixed with each other, the resulting mixture is heated in a water bath to a temperature of 70-80 ° C and gelatin is added with stirring until a homogeneous mass is poured into molds, kept until hardened, at the final stage the finished material is removed from the molds.

The compositions of specific materials are given in Table 1.

The finished material has the form of a gel and has high performance characteristics:

- the ability to pour the composition into any form provides a wide range of applications;

- density and elasticity corresponding to the density and elasticity of human soft tissues;

- self-healing of punctures (see Fig. 4) due to the elasticity caused by the gel-like structure, provides the possibility of reusable use;

- stability of size and shape over time due to the prevention of water evaporation (see Fig. 3) leads to a longer service life;

- echogenic properties (see figure 1) allow the material to be used for practicing ultrasound examination skills.

Claims (2)

An echo-conductive material for simulating soft tissues, containing gelatin, glycerin and distilled water, characterized in that it additionally contains polyacrylamide and dye in the following ratio of components, wt.%: gelatin 5-10 glycerol 33-38 distilled water 6.5-11.5 polyacrylamide 45-50 dye 0.5