RU2170107C1 - Apparatus for introducing liquid into individual's organism - Google Patents

Abstract

FIELD: medical equipment. SUBSTANCE: apparatus has polymeric needle for puncturing plugs and sleeves, dropping bottle and injection unit, which are connected in succession via pipe with clamp. Filter is positioned in lower part of polymeric needle, at dropping bottle inlet end. Dropping bottle is made as separate constructional member of cylindrical shape, which is continued with conical part provided with drop forming opening in apex part. Cylindrical cavity with annular projection is positioned in lower part of polymeric needle. Drop former is positioned in cylindrical cavity. Filter for liquid is clamped between annular projection in polymeric needle and drop former cylinder end. Apparatus may be used for intravenous injection of blood, blood substitutes and infusion solutions. Construction of apparatus eliminates air embolism, which may occur in case air bubbles are generated under filter, but they cannot get into dropping bottle lower part, to its outlet channel. EFFECT: reduced manufacture costs, simplified construction and enhanced reliability in operation. 2 dwg

Description

 The device relates to medicine and can be used when infusing blood, blood substitutes and infusion solutions into the human body.

 Known devices for introducing fluid into the human body, the droppers of which are combined with a polymer needle for piercing plugs and fittings of containers with infused fluid, for example, a KDM device for transfusion of blood and blood substitutes of the German company KD Medical GmbH Hospital Products [1]. The disadvantage of this medical device is that the tightness of the connection of the dropper with the needle is achieved by gluing the mating surfaces, using highly toxic adhesives, and the production is harmful. In addition, the liquid filter is located in the specified device in the lower part of the dropper, which does not completely exclude the possibility of accumulation of air bubbles under the filter and their further capture by the current of the infused liquid into the channel of the vessel. As a result, the phenomenon of embolism is observed.

The closest in technical essence to the proposed device is a system for blood transfusion, manufactured by the Lithuanian company "VILTECHMEDA" [2]
The dropper in this system is also combined with a polymer needle for piercing the cork, a liquid filter is placed inside the dropper body. The disadvantage of this design is the use of highly toxic adhesives to connect the above structural elements and the formation of air bubbles in the lower part of the dropper under the filter.

 The purpose of the invention is to exclude highly toxic substances or expensive equipment from the assembly process in the case of joining parts using high-frequency welding, and also by placing a liquid filter in the lower part of the polymer needle to prevent air from entering from under the filter into the overflowing liquid and thereby prevent embolism.

 To achieve this goal, in the device for introducing liquid into the human body, including a polymer needle, a dropper with a liquid filter and an injection unit, connected in series through a tube equipped with a clamp, a separately made droplet former is introduced. It is a hollow cylinder turning into a cone, on top of which a drop-forming hole is made. The outer cylindrical surface droplet mating is interference with a cylindrical cavity made in the lower part of the polymer needle, i.e. the outer diameter of the droplet forming cylinder is larger than the diameter of the cylindrical cavity in the polymer needle, and the fluid filter is sandwiched between the end of the droplet forming cylinder and the annular protrusion made in the polymer needle body.

 The following is an example of a specific implementation of the device with reference to the drawings.

 Figure 1 - General view of a device for introducing fluid into the human body.

 Figure 2 is a view in section of the connection of the polymer needle with a dropper.

 The proposed device consists of a polymer needle 1, a dropper 2 and an injection unit 3 connected by a tube 4, on which the clamp 5 is placed (see figure 1).

 In FIG. 2 shows a sectional view of the construction of a "polymer needle - dropper". Here, item 6 denotes a droplet formed by a separate element, by means of which a liquid filter 7 is fixed in the lower part of the polymer needle 1. The filter 7 is clamped between the end of the droplet 6 and the annular protrusion A, specially made in the needle body 1. needles 1 are connected "tightly".

 Such a constructive implementation of the site by placing the filter in the lower part of the polymer needle avoids air bubbles at the exit of the dropper and, thus, prevents embolism.

 In addition, the proposed device is more technological, because its assembly does not require expensive equipment for high-frequency welding of polymer parts, toxic adhesives are not used, and the tightness and strength of the joints are ensured by mechanical interference using simple and inexpensive technological equipment.

Sources of information
1. Leaflet of the company KD Medical GmbH Hospital Prodacts (Registration certificate of MH MPR N 98/33 of 01/14/98)
2. Product catalog of the company "VILTECHMEDA", catalog N 8101320.

Claims (1)

 A device for introducing fluid into the human body, including a polymer needle, a dropper with a liquid filter and an injection unit, connected in series through a tube provided with a clamp, characterized in that the polymer needle is provided with a droplet made in the form of a hollow cylinder that goes into a cone with a drop-forming hole on its top, the outer cylindrical surface, it is paired with a cylindrical cavity made in the lower part of the polymer needle, and the outer diameter of the cylinder droplet ator larger than the diameter of the cylindrical cavity in the needle of the polymer and the liquid filter is clamped between an end face of the cylinder and kapleobrazovatelya annular projection formed in the polymer of the needle housing.

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