DE8633262U1 - Closure piece for an infusion device - Google Patents

Description

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Description

The innovation relates to a closure piece for an infusion device with at least a first connection for an infusion line and a ventilation device which has a ventilation tube and a ventilation opening.

Infusion devices have at least one bottle for infusion solutions, which has a closure piece that can only be used for this bottle, without this closure piece being able to be used to connect to other infusion solution bottles.

The known infusion devices are subject to certain limitations in their use in that the bottles must be replaced in good time if the volume of infusion fluid is greater than that of the bottle connected. The bottle must then be replaced in good time by the operating staff, which requires a relatively high level of monitoring and work and also leads to contamination problems.

It is therefore advisable to use several bottles for an infusion, whereby these are connected to one another in such a way that they can be emptied one after the other. However, suitable connectors or closures are missing for this.

The innovation is therefore based on the task of creating a closure piece for an infusion device, which makes it possible to connect several bottles for infusion solution to one another.

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According to the innovation, the closure piece has a connection for an infusion line, as well as a ventilation pipe, which is connected to a ventilation opening via a connecting line and an arch connection for a liquid line is attached to the ventilation opening. The connection is conveniently arranged on the side of the closure piece and can be closed.

According to another advantageous embodiment of the innovation, the connection for the infusion line is arranged directly on the closure piece. When using a known closure piece with a drip chamber, the bottom wall of the drip chamber can be easily omitted so that the infusion tube can be connected directly to the connection pin on the closure piece, which otherwise forms the drip outlet.

An example of the innovation is shown in the drawing and described below.

Show it:

Fig. 1 an infusion device with three infusion bottles;

and
Fig. 2 an enlarged view of a closure piece with drip chamber.

The infusion device shown in Fig. 1 has three infusion bottles (1, 2, 3). The infusion bottles are closed by means of closure pieces (4, 5, 6). Between the closure pieces (4, 5, 6) there are lines (7, 8) for liquids, which are attached to the closure pieces (4, 5, 6) and connect the bottles (1, 2, 3) to one another. The lines (7, 8) are provided with closure elements,

which are designed here as ratchet clamps (9, 10). Both the locking pieces (4, 5, 6) and the lines (7, 8) are made of plastic.

The closure piece (4) of the first infusion bottle (1) is shown enlarged in Fig. 2. It has a cap-shaped part (11) which covers the neck of the bottle

(I). On the outside of the cap-shaped part (11) there are two concentrically arranged cylindrical extensions (12, 13), between which a drip chamber (14) with an outlet pipe (14a) is inserted. On the bottom (15) of the cap-shaped part (11) there is also a central connecting pin (16) which forms a connection (17) from the inside of the cap-shaped part to the inside of the drip chamber (14). A further connecting pin

(18) is provided inside the cap-shaped part. A ventilation pipe (shown broken off in Fig. 2) is advantageously inserted into the connecting pin (18).

(19) is inserted. In the bottom (15) of the cap-shaped part

(II) a line (20) runs, starting from the connection pin (18), in a radial direction, which leads to the cylindrical side wall (21) of the cap-shaped part (11) and opens there. A connection (22) is attached to the outside of the cap-shaped part (11) of the closure piece (4). The connection (22) is provided with a closure (23) which is connected to it in one piece via a flexible connecting element (24). The line (7) can be connected to the connection (22), which has a corresponding connection piece (25) at its associated end.

The closure pieces (5, 6) of the second and third (last) bottles (2, 3) are basically constructed in the same way as the closure piece (4). In contrast to this, however, in these closure pieces (5, 6) the drip chamber (14) has no bottom (25a) and no outlet pipe (14a), so that the lines (7, 8) with

the central connection pin (16) as the first connection in each case. The lines (7, 8) are firmly attached to the connection pins of the closure pieces (5, 6) corresponding to the connection pin (16).

The function of the infusion device is described below.

After the bottles (1, 2, 3) have been opened as usual and the ventilation tubes (19, 26, 27) have been attached to the bottles, the bottles can be hung on an infusion stand (not shown) (preferably at approximately the same height). The ratchet clamps (9, 10) are opened. Now the closure element (29) on the closure piece (6) is opened. A dosing clamp (31) provided on the infusion tube (30) attached to the first bottle (1) is closed. The level of the drip chamber (14) is adjusted. The desired number of drops is set using the dosing clamp (31). Air bubbles now enter the bottle (3) through the ventilation via the closure piece (6) on the bottle (3). A quantity of liquid from the bottle (3) corresponding to the air bubble enters the bottle (2) via the line (8), which serves as a liquid connection hose. A drop of the same volume enters the bottle (1) via the line (7). This causes a drop of the corresponding volume to enter the drip chamber. In the bottles (2) and (1) a mixture takes place with the liquids from the bottles (3) and (2) respectively. Due to the physical relationships, the bottle (3) is emptied first. Then comes the mixture from the bottle (2), the volume of which has not changed so far. After the bottle (2) has been emptied, the bottle (1) is also emptied.

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Volume transport is independent of viscosity. This applies to both two and several bottles. If you want to replace punctured bottles, the corresponding ratchet clamps (9/ 10) must be closed in order to prevent leakage from the ventilation pipes.

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emptying bottle (3) must be provided with a hydrophobic microporous sterile filter (32) - shown in Fig. 1 - whereby the sterility of the entire system is maintained under pressure equalization during the infusion.

Claims (6)

Protection claims 1. Closure piece for an infusion device, with at least a first connection for an infusion line and a ventilation device which has a ventilation tube and a ventilation opening, characterized in that a second connection (22) for a line (7, 8) is attached to the ventilation opening. 2. Closure piece according to claim 1, characterized in that the connection (22) is attached laterally to the closure piece (4, 5, 6). 3. Closure piece according to claim 1 or 2, characterized in that the connection (22) is closable. 4. Closure piece according to claim 3, characterized in that the connection (22) can be closed with a sterile filter (32). 5. Closure piece according to one of claims 1-4, characterized in that the first connection for the infusion line (30) is arranged directly on the closure piece (4, 5, 6) and the line (7, 8) has connecting means at the end facing away from the closure piece (4, 5, 6) which can be connected to the second connection (22) of a further closure piece (4, 5, 6). 6. Closure piece according to one of claims 1-5, characterized in that the first connection is attached to the drip chamber (14) which is arranged on the connection piece (11).