RU2766726C1 - Device for taking the first portion of the biological fluid flow - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to the field of medicine, and more specifically relates to sanitary and hygienic means for individual use for the selection of the first portion of the flow of biological fluid, such as urine, for subsequent laboratory studies. A device for taking a portion of a biological fluid, such as urine, on a stream, comprises a unit having an inlet for receiving fluid, an outlet for draining the fluid and a guide element with holes connecting the inlet and outlet, a movable element inside the guide element that distributes, when moving, the flow of the incoming liquid into the reservoir for taking the first portion and at the exit. The device is characterized by the fact that it contains an inlet device for receiving a liquid flow, made in the form of a watering can - a cone-shaped, approximately trapezoidal-rectangular in cross-section, and a branch pipe with an anatomical tubular bend, mating the narrowed outlet of the watering can with the inlet of the guide, which has the form of an inverted glass with a thread in the lower open part for connection with a counter thread of the tank, and opposite to the inlet, outlet, outlet device in the form of a branch pipe, mated to the inlet with the outlet and having a cut angle of 30-50° at the end. The inlet, guide and outlet are made in one piece made of lightweight polyethylene.

EFFECT: device increases the efficiency of laboratory research, as it has good operational capabilities for hygienic and convenient use by all categories of patients, women in a sitting and standing position, as well as small children without assistance.

4 cl, 3 dwg

Description

The invention relates to the field of medicine, and more specifically to personal hygiene products for the selection of the first portion of the flow of biological fluid, such as urine, for subsequent laboratory studies.

There are various devices for collecting liquid biological material. The devices have various devices for diverting and collecting urine, positioning and fixing them on the body, sealing these devices for male, female, and children (PM RF No. 150112, No. 14889, No. 142356, No. 68291, No. 68887)

A device for collecting liquid biological material is known, including a test tube and a funnel, while the funnel is collapsibly connected to the test tube (patent PM RF No. 181533).

The devices have various devices for diverting and collecting urine, positioning and fixing them on the body, sealing these devices for male, female, and children (PM RF No. 150112, No. 14889, No. 142356, No. 68291, No. 68887)

Known devices are simple in design and manufacturing technology, but if the study requires the first portion of urine, then the urine flow must be interrupted, which is difficult for adults and not feasible for children.

Separate urine streams are necessary for microbiological and molecular genetic studies in a strictly defined volume. For molecular genetic studies, it is necessary to take the first portion of urine and mix it with a preservative of the same volume, which cannot be done without the use of additional devices.

Sampling must be carried out in appropriate sanitary and hygienic conditions that create optimal conditions for subsequent storage, transportation of urine and accurate diagnosis of human pathological conditions.

Known liquid sampler, in which the liquid enters through the inlet, then passes through the valve into the sample chamber, and then the valve closes, diverting the remainder of the liquid flow into the overflow fitting of the sampler. (WO 2004/010873).

A device is known for capturing a given volume of a given part (for example, the first part) of a liquid stream such as urine (BE 1021230 (B1)).

The device comprises a node containing an input for receiving a fluid flow; outlet for draining the liquid; a guide connecting the inlet and outlet, with a movable element inside, and a sample collection tank connected to the guide. The movable element has lifting means and in its first position the first part of the liquid is discharged into the reservoir, in the second position access to the reservoir is blocked and in the third position it opens the passage of liquid from the inlet to the outlet.

In the device, according to the embodiments, the inlet may contain a funnel. If the movable element moves in a direction transverse to the direction of fluid flow, for example, perpendicular to it or within a small deviation from this perpendicular direction, then the force required to move the element in such a direction is reduced. The shape of the funnel as a urinal device and its connection to the entrance influence the achievement of such a positive effect. However, known funnels and outlet connections do not provide such movement. In addition, these known forms are inconvenient for different categories of patients, lead to discomfort for the user, causing errors in the collection of urine, require additional manipulations and devices, both at home and in the laboratory, and are also unhygienic in use.

The present invention is aimed at eliminating these disadvantages, simplifying and reducing the cost for mass disposable use.

The technical result is achieved by the fact that in a device for selecting the first portion of a flow of a biological fluid, such as urine, containing an assembly having an inlet for receiving fluid, an outlet for draining the fluid and a guiding element connecting the inlet and outlet, a movable element inside the guiding element, distributing moving the incoming liquid flow into the tank for taking the first portion and to the exit, the assembly contains an inlet device for receiving the liquid flow, made in the form of a rigid watering can - a urinal with a cone-shaped, essentially trapezoidal-rectangular shape in cross section, one side of the watering can is essentially longitudinal, co-directed guide, and shorter than the other, and a branch pipe with an anatomical tubular bend, matching the outlet narrowing of the watering can with the inlet of the guide, and the outlet is made in the form of a nozzle having a cut angle of 30°-50° at the outlet, while the inlet, guide and outlet are made whole, made of lightweight polyethylene.

It is advisable that the movable element be made in the form of a two-section tubular element with a variable cross section, entirely, made of lightweight polyethylene, while the upper tubular segment has a round cross section and a through hole on the side, and the lower segment has an oval cross section, conjugated at the edges of a long radius with top, and created an internal channel forming a hydraulic connection between the inlet device and the tank for taking a portion of the liquid in the first position and a bypass channel with the outlet device in the second position.

Watering can - urinal is equipped with a side protruding along the edge, which is equipped with a shock-absorbing edging, made, for example, from (material)

The tank for taking the first portion is connected to the guide by a threaded connection.

The invention is further explained by the description and drawings, where:

Fig. 1a shows the assembly of the device according to the invention, in section, in perspective,

Fig. 1b shows the node of FIG. 1a in section,

Fig. 2 shows the device according to the invention, in general assembly, in section, with a movable element located in the first (lower) position for directing the first portion of the liquid flow into the tank,

Fig. 3 shows the device according to the invention, in general assembly, in section, with a movable element located in the second (upper) position for directing the second portion of the liquid flow to the outlet.

A device for sampling a portion of a biological fluid, such as urine, on the flow contains a node having an inlet for receiving fluid, an outlet for draining the fluid, and a guiding element connecting the inlet and outlet. Inside the guide element there is a movable element that distributes the flow of the incoming liquid during movement into the tank for taking the first portion, connected to the guide, and to the outlet, to the drain.

In FIG. 1a-1b show an assembly 1 of an on-line sampling device for a portion of a biological fluid, such as urine, according to the invention. Node 1 contains an inlet device for receiving a fluid flow, made in the form of a rigid watering can - a urinal 8 having a truncated conical shape, cone-shaped, essentially trapezoidal-rectangular in cross section. One side 14 is essentially longitudinal, almost co-directed with the guide 3 and shorter than the other side 15, and the round neck is made with a protruding rim 7.

Watering can-urinal 8, opposite to the neck of the narrowed end, is connected to the hole 10 in the guide 3 anatomically curved pipe 11. The pipe 11 contains one curved part 12 extending from the narrow end of the watering can-urinal 8, and the other part 13 connected to the inlet hole 10 The curved part 12 has the shape of a truncated cone and forms with part 13 an obtuse angle close to 170°. Such connection allows the movable element to move further almost perpendicular to the incoming fluid flow, which reduces the force required for such movement.

The guide 3 has the form of an inverted cup with a thread in the lower open part and a tight connection with the mating thread of the tank 5 and contains an opposite inlet, outlet 9.

The output device 4 is made in the form of a branch pipe having a cut angle of 30°-50° at the outlet.

The resulting hydraulic connection between the inlet and outlet allows for the most stable and directed flow for the withdrawal of the first portion and for the rapid removal of liquid after the withdrawal of the first portion, avoiding leakage and mixing.

Knot 1 is made entirely of lightweight polyethylene. Polyethylene is a material having a density of 0.9-0.94 g/cm3, and a melting point of 103 C, it is technologically advanced, of low cost, and is easily used and recycled.

The movable element 6, which is placed inside the guide 3, is made in the form of a two-section tubular element with a variable section, entirely, made of lightweight polyethylene (Fig. 2, Fig. 3). The upper tubular segment 16 has a circular cross section and a through hole 18 on the side, and the lower segment 17 has an oval cross section and creates an internal channel 19 forming a hydraulic connection between the inlet device and the reservoir 5 for taking a portion of liquid in the first lower position (Fig. 2) of the movable element 6 and bypass channel 20 with outlet 4 in its second upper position (FIG. 3).

The movable element 6 is initially set to the first (lower) position so that the hole 18 coincides with the hole 10 in the guide 3. When taking a portion, the flow enters the watering can 8, and is directed by the shape of the watering can and the curved pipe 11 through the hole 18 into the internal channel 19 and beyond into tank 5.

The transition from the first to the second (upper) position of the movable element 6 occurs due to the lifting force of Archimedes, which occurs due to the lightness of the material of the movable element relative to the biological fluid, having a density of at least 1.003.

The movable element 6 floats essentially transverse to the fluid flow and takes a position blocking the entrance to the internal channel 19. The fluid flow is directed to the outlet 4 to drain.

The guide 3 and the reservoir 5 are connected by a hermetically detachable threaded connection.

To do this, the guide 3 is provided with a thread in the lower part, and the tank 5 has its own thread, which is screwed onto the guide. This allows you to conveniently remove the sample container and eliminate leakage, and provides convenient use of the device in various conditions. A device for capturing the first portion of the liquid flow can be used in conjunction with a preservative. To do this, a reservoir 5 with a pre-filled preservative is applied to the device. For the device, it is advisable to use a preservative that contains: a DNA and RNA stabilization agent, protein compounds and other preservative agents to maintain the stability of the analytical and microbiological components of the collected urine.

The preservative allows storage and transportation at room temperature for 4 days of the selected first portion of the stream of biological fluid, such as urine, in order to conduct further general, microbiological, clinical-biochemical and molecular genetic analyzes.

The low melting point and plasticity of polyethylene make it possible to produce a product with low energy consumption, which simplifies and reduces the cost of its production and makes it widely suitable for mass production and use.

The device is used as follows.

When used in a sitting or standing position, the patient firmly presses the urinal to the genitals with one or both hands so that the reservoir for collecting the first portion of the liquid is at the bottom and the moving element is directed upwards. The outlet branch pipe is cut with a cut into a container for collecting the second portion of the liquid or into the toilet bowl. At the end of urination, the patient removes the urinal and, at arm's length, unscrews the reservoir with the first portion of the liquid. The device is disposable and can be recycled.

The invention can be used for sampling both at home and in healthcare facilities.

The device increases the efficiency of laboratory research, as it has good operational capabilities for hygienic and convenient use by all categories of patients, women in a sitting and standing position, as well as small children without assistance.

Claims (4)

1 A device for sampling a portion of a biological fluid, such as urine, on the flow, containing an assembly having an inlet for receiving fluid, an outlet for draining the fluid and a guide element with holes connecting the inlet and outlet, a movable element inside the guide element, distributing the flow of incoming fluid when moving into the tank for taking the first portion and to the outlet, characterized in that it contains an inlet device for receiving a fluid flow, made in the form of a watering can - a cone-shaped urinal, approximately trapezoidal-rectangular in cross section, and a branch pipe with an anatomical tubular bend, mating the narrowed outlet of the watering can with an inlet of a guide having the form of an inverted cup with a thread in the lower open part for connection with the mating thread of the tank, and an opposite inlet outlet, an outlet device in the form of a branch pipe associated with the inlet with the outlet and having a cut angle of 30-50° at the end, while the input device o, the guide and exit device are integrally made from lightweight polyethylene. 2. The device according to claim 1, characterized in that the movable element is made in the form of a two-section tubular element with a variable section entirely made of light polyethylene, while the upper tubular segment of the element has a round cross section and a through hole on the side, and the lower segment has an oval cross section , moreover, when the element is moved to the lower position, the hole of the upper segment coincides with the inlet of the guide and creates an internal channel that forms a hydraulic connection of the inlet device with the reservoir and takes a portion of the liquid, and when moving to the upper position, it creates a bypass channel that forms a hydraulic connection of the inlet device with the outlet a branch pipe for draining or sampling the subsequent liquid. 3. The device according to claim. 1, characterized in that the watering can is equipped with a side protruding along the edge. 4. The device according to claim 1, characterized in that the tank is connected to the guide by a hermetically threaded connection.

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