DE8021253U1 - Blood bag with a connection system - Google Patents

Description

g: Our no. 22 958 Pr / br §

v ^; Biotest Serum Institute GmbH f

6000 Frankfurt-Niederrad f

Blood bag with a connection system

The innovation concerns blood bags with a connection system. ;

Blood bags are used for collection, storage and preparation
and transfusion of blood and blood components. One
the advantages of the blood bag to the blood bottles from \ glass is that multiple blood bag Systeinen
( Blood preparations' in a closed, ie sterile
System are possible. The production of blood preparations wins in the context of "made-to-measure hemotherapy"
more and more importance.

Multiple bag systems as they are currently in the trade | consist of 2 or more bag systems, with | which generally have a primary pouch that stabilizes the blood

-A-

Satorlösung contains and serves to absorb the blood. For the preparation of blood components such as plasma, Factor VIII concentrate, platelet concentrate etc. is used by the secondary or satellite bag or the satellite bag system that comes with the primary bag is connected to a hose system.

So that the solution in the primary bag or the drawn blood does not get into the Tube system of the secondary bag system passed, the primary bag carries a connection system which, after opening, transfers the preparation from the primary bag the secondary bag allowed.

There are various design options for this connection system.

For example, a connection system is known which consists of a ball which is pressed into a flexible hose will. Free passage is possible after the ball has been pushed out of the hose. This The system has the disadvantage that under extreme conditions, such as overpressure, centrifugation, mechanical changes the tube diameter etc. there is no hermetic seal.

There are also systems known which have clamping devices, which, however, usually have the disadvantage that they are voluminous and that the used

The tube has permanently narrowed or stuck together before the use of the bag, so that after opening the Terminal no free flow is guaranteed.

US-PS 3,110,308 describes a connection system, consisting ofa membrane that is perforated with a cannula-like spike. With this system often the laborious and time-consuming manipulation oeans.

Ultimately, breakaway systems are known in which By breaking off a plastic part in a hose system, a free passage is possible. Such Systems are located outside a blood bag in the connecting tube between the primary and secondary bags. This has the disadvantage that a clean and optimal separation of the blood preparations is often required E.g. centrifugation is not possible and the preparation is contaminated. Besides, the manufacturing and assembly of such systems is complex and costly.

The task of the innovation was therefore to provide a connection system that had the advantages of the breakaway system shows, but at the same time flush with the blood bag, so that contamination of the Secondary bag, e.g. after centrifugation, is not possible, whereby production and handling of the System should be as simple and safe as possible.

|; This object was achieved in accordance with the renewal principle that

the connection system includes a connector 15}

• from connecting part (7), break-off part (8), predetermined breaking point

j: (9) and, if necessary, collar (6), whereby the connecting piece (5)

Si is directly connected to the blood bag (1) in such a way that

; = that it is located directly on the upper edge of the bag

J and is essentially flush with it, where

■ Break-off part (8) protrudes into the bag so that the

;; Breaking part (8) is present inside the bag after breaking off.

I: The renewal is to be explained further on the basis of the illustrations

ι- ^l ) will:

ν Fig. 1 shows one, the innovation according to the "connection

j (, blood bag containing the system, which is connected to a second

f blood bag is connected.

Fig. 2 shows the connection system as such.

Fig. 3 shows a cross section through a particular one; Embodiment of the break-off part and

Fig. 4 shows an embodiment in which the connection system directly into the blood bag without a tube is incorporated.

• · Il

¹¹ Il tt ♦ t · "*

I I I I · · · · · ■

'(Il I t f ■ ti

'Il <· ■ · <· · t ι

I I I I I I I I ti

• ι Ii ι · at t>

Fig. 1 shows the blood bag (1) (primary bag) with the blood collection tube (4), which is connected to the blood bag (2) (Secondary bag) is connected by a connecting tube (3). The blood bag (1) is through the $ Binding piece (5) completed in a liquid-tight manner. ■ · ''

When the connection piece (5) is opened, the prefix if

ready to flow over the connection hose (3) into the secondary bag (2). In the embodiment shown in Fig. 1 f 'embodiment, a part of the connecting piece (5) is located in a recess (1c). A tube (1b) is also shown which, according to one embodiment, is located between the blood bag (1) and the connecting piece (5).

Fig. 2 shows a detailed enlargement of the connecting piece (5) used as a connecting system. It consists of a collar (6), connecting part (7), Break-off part (8) and predetermined breaking point (9). When installing in the blood bag, the collar (6) is connected to the connecting tube (3), the connecting part (7) is connected to _. hermetically connected to the blood bag (1) and ^ part (8) is connected to the connecting part (7) via the break-off or predetermined breaking point (9). Predetermined breaking point (9) is designed in such a way that when the connection part (7) is broken off, the corresponds to or approximately corresponds to the lumen of the connecting part (7). If transfer tube (3) is glued inside the collar (6), so after breaking off the demolition part (8) is created by the complete System a free flow, which has approximately the lumen of the connecting tube (3).

I I I · · · · · ■ t

After opening the connection system, the break-off part remains (8) in the primary bag (1). So this part in the embodiment in which it is freely in the bag falls during the transfusion or preparation when the preparation runs through the tube (3) or any other outlet nozzle does not become a closure of the flow, the break-off part (8) has a structured surface that allows it to flow past the liquid allows.

Fig. 3 shows a cross section of a preferred surface structure of the break-off part (8), which is composed of 4 semicircles in the shape of a rosette.

Fig. 4 shows an embodiment in which the connecting piece (5), consisting of connecting part (7) and Break-off part (8), is welded directly into the bag. The connection hose (3) is in this case after Welding the part glued directly into the open part of the system.

The connecting piece (5) is connected to the connecting piece (7) (Fig. 2) connected to the blood bag, the connecting piece (5) via a tube (1b) of the bag (1) (as in Fig. 1) or directly with the bag (as in Fig. 4) is connected. The hose (3) and the connecting part (7) of the connecting system (5) can also be designed in this way be that hose (3) is inserted into connecting part (7).

The connection of the hose (3) with the connector (5) and the bag (1) can be achieved by gluing or welding or by other known joining techniques, such as

M ·· ·· «■ fm « ·

I III · t a · · · · III * · I I · # ···

I Il I ·· ·· · <· It · • III II ·· ····

I 'I) II (I r

Ultrasonic welding or rotation welding take place.

The connector (5) is made of a transparent or colored plastic that has both shows optimal properties during steam sterilization as well as when breaking off.

A slight inclined pressure on the break-off part (8) ^ ) results in a free passage, whereby the predetermined breaking point (9) can be structured in such a way that part (8) still adheres to part (7), but preferably breaks off completely. Plastics such as hard PVC or macroion are suitable for this use. The part can also consist of materials that have a density less than 1; as a result, after separation, it will float on the blood or blood preparation.

The advantage of connector (5) is that it is almost flush with the top edge of the blood bag (1) and thus no contamination of the ('") preparation can occur. As shown in Fig. 1 or 4 the upper edge of the blood bag can also be designed in such a way that the connecting piece (5) in a recess (1c) of the bag. This facilitates the manipulation of the abort because here Blood components of the bag (1) are not stirred up. Recess (1c) can also be designed as a pocket so that the break-off part (8) does not fall freely into the bag (1), but is retained in the pocket.

Et I ·

- 10 -

In this pall there is a surface structure, as shown for example in Fig. 3, * 3es break-off part (8) not necessary.

For: Biotest-Serum-Institut GmbH, 6000 Prankfurt-Niederrad,

ti 1111 J 1 1

Claims (7)

1. Blood bag with a connection system, thereby characterized in that the connecting system contains a connecting piece (5) from connecting part (7), Break-off part (8), predetermined breaking point (9) and, if necessary, collar (6), wherein the connecting piece (5) is connected directly to the blood bag (1) in such a way that it is directly attached the upper edge of the bag and is essentially flush with it, with the break-off part (8) in the Bag protrudes so that the break-off part (8) is present in the interior of the bag after breaking off. 2. Blood bag according to claim 1, characterized in that ■ * that it has a recess on its upper edge of the bag (1c) and that the connecting piece (5) is arranged in this recess. () 3. Blood bag according to claim 2, characterized in that the recess (1c) is designed as a kind of pocket is in which the broken-off part (8) is retained. 4. blood bag according to one of the preceding claims, characterized in that the break-off part (8) consists of ν a material which has a lower density than blood. 5. blood bag according to one of the preceding claims, characterized in that the break-off part (8) is completely exposed and that it has a surface structure possesses which is such that the leakage of blood or blood preparations from the blood bag not be hindered. 6. Blood bag according to claim 5, characterized in that the surface structure of the break-off part (8) has a cross-section that is rosette-shaped • composed of 4 semicircles. 7. Connection system for blood bags, ^v "standing from connecting part (7), break-off part (8), predetermined breaking point (9) and, if applicable. Collar (6).