RU2569604C1 - Blood, blood substitute or infusion solution line - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: line comprises at least one resilient-elastic connecting tube, and at least one connector used for coupling to external devices and mounted at the end of the tube. Each connector is made of a rigid polymeric material comprises at least one hollow cylinder with a lead-in cone and coupled to the connecting tube to form a tight non-adhesive mechanical connection set by coupling an internal surface of the connective tube to an external surface of the cylinder. An external diameter of the connector exceeds an internal diameter of the connecting tube by 0.1÷1 mm, whereas a length of the cylinder makes from 3 to 20 mm.

EFFECT: higher safety and lower toxicity by avoiding the use of adhesives for coupling the connecting tubes to the connectors, simplifying the manufacturing procedure of the device, as well as increases ease of use of the finished device by the simple tube connection to external devices.

4 cl, 2 dwg

Description

Technical field

The invention relates to medicine and medical equipment and can be used for transporting blood, blood substitutes and infusion solutions. The line can be used, in particular, in dialysis systems, donor and therapeutic plasmapheresis, in devices for extracorporeal blood purification, in devices for collecting and reinfusion of blood, etc.

State of the art

Until now, adhesive devices have been used in devices for transporting blood, blood substitutes, infusion solutions and drugs in the form of a system of tubes and connectors. In mass production, toxic glues based on solvents of cyclohexanone and tetrahydrofuran were used for bonding parts.

It is known that the toxicity of most adhesives leads to air pollution by vapors of volatile monomers, solvents and other components. Skin contact with highly toxic adhesives is also potentially dangerous. Synthetic adhesives have a local irritant effect and cause allergic diseases.

The toxic effect is associated mainly with exposure to monomers and organic solvents. Thus, the health of production workers in the manufacturing process of medical equipment is at risk.

The equipment that is manufactured in such a hazardous production includes a medical system with a set of highways for transporting liquid media (European patent No. 0443324, publication March 28, 1991). The system includes a set of trunk tubes made of polymer material. Connectors for connecting the tubes to each other and connecting them to external devices are glued to the tubes. The manufacturing process of the well-known set of highways includes the operation of applying glue and joining the parts together, drying the glue, using toxic products. For the manufacture of the system requires sophisticated equipment.

The closest analogue to the present invention is a set of trunk tubes to a dialysis apparatus, disclosed in international application WO 2010/100074. The known device includes a plurality of trunk tubes made of an elastic material and a plurality of connectors mounted at the ends of the tubes for connecting the tubes to each other and to external devices. The connection between the individual parts of the main tubes and between the tubes and external devices is made in the form of threaded connectors, consisting of two parts - the part belonging to one connected pipe part with the external thread and the part belonging to the other connected pipe part with the internal thread. The connection is made by screwing one part of the connector into another. At the same time, during assembly, the connected parts of the tubes are twisted, which leads to a narrowing of the bore and, consequently, to distortion or even stopping the flow of transported liquids during operation of the device. In the known device, only two tubes, or one tube with an external device, can be connected to each other. An adhesive joint is used to connect a connector having a threaded portion to the corresponding tubes. The manufacturing technology of the known device is based on the use of toxic adhesives, while being a largely harmful production. Production workers manufacturing sets of such highways are exposed to toxic effects.

SUMMARY OF THE INVENTION

The present invention is the creation of highways for transporting medical environments manufactured in environmentally friendly industries, preserving the health of production workers.

The technical result consists in increasing the safety and reducing the toxicity of highways, consisting of connecting tubes and connectors, through the use of non-adhesive parts. In addition, the technical result consists in simplifying the technological process of manufacturing the line by eliminating the operation of applying glue, as well as in improving the usability of the finished product by simply connecting the connecting tubes to external devices: means for treating blood, supplying infusion solutions.

An additional technical result consists in providing a convenient and reliable connection of parts of highways for transporting medical media in accordance with the requirements of the international standard ISO 1135-4 and GOST 25047. The technical result is achieved due to the fact that the device for transporting blood, blood substitutes and infusion solutions, including at least one connecting tube made of an elastic material and at least one connector mounted at the end of the tube for communication over of at least one tube with other tubes or external devices, the connectors are made of rigid polymeric material, include a hollow cylinder with a lead-in cone and are connected to the connecting tubes with the formation of a sealed non-adhesive mechanical connection made by pairing the inner surface of the main tube with the outer surface of the cylinder, the outer diameter of the cylinder of the connector is greater than the internal diameter of the connecting tube by 0.1 ÷ 1 mm, and the length of the cylinder is from 3 to 20 mm.

The connector is made in the form of a tee, including three hollow cylinders with entry cones, while the internal cavities of the cylinders are interconnected.

The connector can be made in the form of a cross including four hollow cylinders with entry cones, while the internal cavities of the cylinders are interconnected. The line may preferably be disposable. The line may preferably be made of polyvinyl chloride.

Description of drawings

The invention and the possibility of achieving a technical result will be more clear from the following description of specific embodiments of the design of the highway with reference to the accompanying drawings, where:

in FIG. 1 shows a General view of the trunk for plasmapheresis, which uses connectors having cylinders with a lead-in cone for connection with connecting pipes of the trunk;

in FIG. 2 shows an embodiment of a connector in the form of a tee.

Examples of embodiment of the invention

The line in the simplest case may contain one connecting tube and one connector.

The connector is made of rigid or semi-rigid polymeric material. It includes one or more hollow cylinders with entry cones. In the manufacturing process of the trunk, a connecting tube is put on the connector. The connecting parts of the line is carried out by pairing the inner surface of the connecting tube with the outer surface of the cylinder.

In order to form a sealed non-adhesive mechanical connection, two conditions must be met. Firstly, the inner diameter of the connecting tube should be 0.1 ÷ 1 mm less than the outer diameter of the connector. Secondly, for a reliable tight connection between the tube and the connector, the length of the connector cylinder should be from 3 to 20 mm.

The aspect ratio of the tube and cylinder and the shape of the connector, as well as the maintenance of certain technological conditions and the equipment used make it easy to put the tube 1 on the connector 2, forming a sealed connection. In this case, first the entry cone 5 of the connector 2 is introduced into the tube 1, moves along the channel of the tube, and then the inner surface of the tube is tightly pulled onto the outer surface of the cylinder 4.

The mentioned ratios were obtained as a result of tests for polymer tubes and fittings used in transfusiology from different materials and with different sizes. When these ratios are met, the tube tightly covers the connector, while meeting the requirements for the strength of the parts that meet the requirements of ISO 1135-4 and GOST 25047.

For medical use in tubes, plastic should have the following properties: insensitive to biological tissues and secretions, elasticity, strength, resistance to radiation and gas sterilization. Also, the tubes must be resistant to leaching of plasticizers and other chemicals added to the material for the manufacture of tubes. Two additional requirements are ease of manufacture and low cost, especially on a mass production scale.

The connecting tube is made of an elastic material that is approved for contact with blood and infusion solutions. In the device shown in figure 1, the connecting tube 1 is made of the preferred material for use in the inventive highways is polyvinyl chloride (PVC).

PVC in many respects is an ideal material and satisfies all of the above requirements. It easily connects to almost any other plastic connector - a quality that not all plastics used for medical tubes possess.

The connector 2 is installed at the end of the PVC tube 1. It is used to communicate with an external device - in this case, a tee 3. The connector 2 is made of rigid polymeric material and is a hollow cylinder 4 with a feed cone 5. The connecting tube 1 is worn on the connector to form a tight non-adhesive mechanical connection by pairing the inner surface 6 of the connecting tube 1 with the outer surface 7 of the cylinder 4. The outer diameter of the 8 cylinder 4 of the connector 2 is larger than the inner diameter of 9 s edinitelnoy tube 1 to 0,1 ÷ 1 mm and the length of the cylinder 4 is from 3 to 20 mm.

The line is disposable and must be disposed of after use. Thus, infection of patients in the procedures of infusion of solutions and extracorporeal blood processing is excluded.

The connector can be made in the form of a tee, including three hollow cylinders with entry cones. This embodiment of the connector can be used, for example, in the lines for hardware or non-apparatus plasmapheresis, in the lines for collecting and reinfusion of blood, where it is necessary to connect the three lines to each other.

The line can be used, for example, in dialysis systems, donor and therapeutic plasmapheresis, in devices for extracorporeal blood purification, in devices for collecting and reinfusion of blood, in devices for transporting blood, blood substitutes or infusion solutions, etc. The line can also be used in detoxification operations together with PFM-01-TT ROSA membrane filters, PFM-800, PFM-500, carbon hemosorbents, devices for conducting ultraviolet irradiation of blood, etc.

The invention has the following advantages:

1) provides a non-toxic process;

2) allows to simplify and speed up the assembly of various medical highways in which blood, drug solutions or other transfusion media are transported;

3) provides the connection of a large number of tubes together using connectors;

4) when connecting the parts of the device there are no deformations and twisting of the tubes, there is no unplanned impact on the process of transporting liquid;

5) provides a convenient and reliable connection of parts of highways in accordance with the requirements of ISO 1135-4 and GOST 25047.

Claims (4)

1. A line for transporting blood, blood substitutes and infusion solutions, including at least one connecting tube made of an elastic material and at least one connector installed at the end of the tube for connecting at least one tube to external devices, characterized in that each connector made of rigid polymeric material, includes at least one hollow cylinder with an inlet cone and connected to the connecting tube with the formation of a sealed non-adhesive fur connection, carried out by pairing the inner surface of the connecting tube with the outer surface of the cylinder, while the outer diameter of the cylinder of the connector is greater than the inner diameter of the connecting tube by 0.1 ÷ 1 mm, and the length of the cylinder is from 3 to 20 mm. 2. The highway according to claim 1, characterized in that the connector is made in the form of a tee, comprising three hollow cylinders with entry cones, while the internal cavities of the cylinders are communicated. 3. The highway according to one of paragraphs. 1-2, characterized in that it is disposable. 4. The highway according to one of paragraphs. 1-2, characterized in that it is made of polyvinyl chloride.

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