HK1085372B - Connector for packings containing medical liquids, and corresponding packing for medical liquids - Google Patents

Description

The invention relates to a connector for packaging, in particular an infusion, transfusion or enteral bag, containing medical fluids, in particular infusion solutions or enteral or parenteral nutritional solutions; in addition, the invention relates to a packaging for medical fluids, in particular an infusion, transfusion or enteral bag, containing at least one such connector.

DE-A-197 28 775 describes an infusion bag with a syringe and a withdrawal compartment. The injection compartment is designed to deliver a medicinal product by means of a syringe for injection, while the withdrawal compartment is designed to withdraw the solution by means of a spike.

The injection and withdrawal parts are connected to the infusion or transfusion bag by means of a tube. To fill the bag with the nutrient solution, a filling cap is inserted into the tube protruding from the bag at a filling station and the bag is filled with the nutrient solution. The tube is then squeezed and the bag is fed to a connector station. There the injection or withdrawal part is attached to the tube and the injection or withdrawal parts are mixed together.

The purpose of the invention is therefore to create a connector for packaging containing medical liquids, in particular infusion, transfusion or enteral bags, which simplifies the manufacture of the bag.

In addition, one of the tasks of the invention is to specify a packaging for medical fluids, in particular infusion, transfusion or enteric bags, which can be easily manufactured, and this task is solved by the features specified in claim 10.

The connector of the invention for packages containing medical liquids, in particular infusion, transfusion or enteral bags, makes it possible to fill the packaging and to place the connector in one station. The advantage is that an additional tube is not required to connect the connector and the packaging. This eliminates the need to cut the tube and the time-consuming positioning.

The connector according to the invention has a connecting part which has a passage to receive a spike to remove the liquid and a closing part which can be placed on the connecting part to close the passage in the connecting part.

The coupling has an elastically deformable release part, formed as a tubular section with a cross-section which is not circular.

The elastically deformable part of the clamping allows the packaging to be filled even when lying down, which is particularly advantageous for large-volume bags. Since the cross-section of the clamping part differs from the circular shape, the clamping part can be clamped with relatively small forces regardless of the material used.

In addition, the release part allows the connector to be closed with a clamp or similar device when used in a hospital.

The release part is connected to a base part extending on both sides which can be integrated into the packaging, preferably welded with the bag.

In order to reduce the installation effort, the closing and connecting parts of the connector according to the invention are preferably fixed in a tight fit. The tight fit makes it possible to install different closing parts, which may be of different formations depending on the application case (infusions, transfusions or enteral feeding).

Another preferred embodiment is a self-sealing membrane between the connecting part and the closing part, which prevents the liquid from leaking out of the package after the spike is removed.

The membrane is used only after the packaging is filled between the connecting and closing parts. Preferably, the membrane between the connecting and closing parts is held in place by elastic deformation of the same. Consequently, the connector can be easily assembled by pressing the parts.

Another preferred design is a capped top-end closure with a removable top-end through a ring-breaking zone, which forms a kind of original closure.

Preferably, the detachable top is shaped as a flat handle that can be easily grasped with the thumb and forefinger.

To indicate the direction of flow, i.e. whether it is a spray or a withdrawal part, the cap-shaped part and/or the flat handle of the closing part is preferably marked with an arrow indicating the flow direction.

The basic component which can be integrated into the packaging is preferably a kind of vessel which can be welded with the film layers of a bag more easily than a tubular body.

The packaging of the invention for medical liquids, in particular infusion, transfusion or enteral bags, shall have at least one connector, preferably two, one of which is designed to be the injection part and the other the withdrawal part.

An example of the implementation of the invention is explained below with reference to the drawings.

It shows: Figure 1a connector for a nutrient solution bag in cut-out form,Figure 2 the connector of Figure 1 from the view of arrow II,Figure 3 the closing part of the connector of Figure 1 in the side view,Figure 4a view of the closing part of Figure 3 from the view of arrow V,Figure 5a + 5b two different cross-sectional shapes of the elastically deformable disconnect andFigure 6a + 6b two alternative embodiments of the disconnect andFigure 7a parent film bag for closing the solution with an injection and disconnect.

The connector A, which is designed to be a drainage part, for example for a parenteral nutrient bag, has a connecting part 1 which has a passage 2 to receive an unmarked spike for draining the liquid.

The connecting part 1 has an elastically deformable clamp part 4 with a cross-section which is different from the circular shape. Figures 5a and 5b show alternative clamp part cross-sectional shapes.

The length of the clamp may be different, for example, a uniform reduction of the cross-section in the length direction is possible, or the clamp may be fitted with a strap, as shown in Figures 6a and 6b.

The base 5 is attached to the outer part of the clamp 4 and extends on both sides, and is shaped like a barrel with pointed outwards edges.

The closure part 3 has a cap-shaped part 6 to which a detachable top part 8 is connected via a ring-breaking zone 7. The cap-shaped part 6 of the closure part 3 is fastened snugly to a cylindrical socket of the closure part 1. The inner wall of the closure part 6 has a circular nut 9 into which a circular protrusion 10 on the outer wall of the cylindrical socket of the closure part 1 snuggles 1.3 when compressing the two parts.

Between the closing part 3 and the connecting part 1, a self-sealing membrane 11 also known as a septum is held in place by elastic deformation of the membrane. The self-sealing membrane 11 has an outer section 12 which is stuck between the cylindrical approach of the connecting part 1 and the sub-section 6 of the connecting part 3. To the outer section 12 an upper ring-shaped section 13 is joined which passes into a lower plate-shaped section 15 by forming a mould-like depression 14 at the top of the membrane. In the centre the plate-shaped section 15 is cross- or slit-shaped so that the elastic material is cut but not cut through.

The handle 8 of the closure part 3 which closes the upper opening 16 for the extraction of the nutrient solution is shaped as a flat body which can be easily grasped and turned with the thumb and index finger. In the centre of the handle there is an arrow-shaped notch 17. On two opposite sides of the sub-part 6 of the closure part 3 there is also an arrow 18, but it is shaped as a raised structure and is placed between two boundaries 19 forming a grip mould (Figures 3 and 4).

To protect the closing part 3 and the connecting part 1 against twisting, a cone-shaped inner or outer gear 20, 21 is provided on the inside of the cap-shaped part 6 and on the outside of the cylindrical attachment of the sample part 1 (Figures 1 and 2).

Figure 7 shows a foil bag 22 filled with a nutrient solution for parenteral feeding, with connector A for the extraction of the nutrient solution and another connector B for the injection of a solution into the infusion bag.

The film bag 22 consists of two layers of film 23, 24 welded together at the bottom and top edges 25, 26 and the longitudinal edges 27, 28.

The bag is then filled with a filling cap, which is inserted into the connecting part 1.1' of one of the two connectors before the closing part 3, 3' is placed on the connecting part. The closing part 4, 4' is then locked with a suitable closing device, which may include, for example, two pressure elements which can be moved against each other, so that no liquid can escape. The closing part 3 is then pressed on the connecting part 1 so that both parts are locked. This closes the connector A. When unlocking the spike split, the closing part 8 is moved to the same closing part by turning or locking the spike split so that the closing part 11 is locked. The opening of the opening is now set in the shape of a special membrane, which is formed by the opening of the spike split membrane.

The membrane is then removed with the parenteral nutrient solution, and when the spike is pulled out again, the membrane seals the connecting part securely even at relatively high internal pressure.

The B-part is used to inject an active substance into the solution, after removing the 8' part, the membrane is pierced with a needle from a syringe, and after removing the needle the B-part is sealed.

Claims (10)

1. Connector for packs containing medical liquids and in particular infusion, transfusion or enteral bags, having a connecting portion (1) which has passing through it a passage (2) to receive a spike for the withdrawal of the liquid, a closure portion (3) which can be fitted onto the connecting portion (1) and which closes off the through-passage (2) in the connecting portion, characterised in that the connecting portion (1) has an elastically deformable clamping-off portion (4) which is in the form of a tubular section of non-circular cross-section, and in that the clamping-off portion (4) merges into a base portion (5) which widens out on both sides and which can be incorporated into the pack.
2. Connector according to claim 1, characterised in that the closure portion (3) and connecting portion (1) are fixed together by snapping on.
3. Connector according to claim 1 or 2, characterised in that a self-sealing membrane (11), which can be pierced by the spike to allow the liquid to be withdrawn, is arranged between the connecting portion (1) and the closure portion (3).
4. Connector according to claim 3, characterised in that the self-sealing membrane (11) is held between the connecting portion (1) and closure portion (3) by a clamping action resulting from the elastic deformation of the two latter.
5. Connector according to one of claims 1 to 4, characterised in that the closure portion (3) has a cap-like bottom part (6) which continues, via an annular fracturable zone (7), into a top part (8) which can be broken off.
6. Connector according to claim 5, characterised in that the top part (8) able to be broken off takes the form of a flat grippable part.
7. Connector according to claim 6, characterised in that the cap-like bottom part (6) and/or the flat grippable part (8) is marked with an arrow (17, 18) indicating the direction of flow.
8. Connector according to claim 7, characterised in that the arrow (17, 18) takes the form of a recess and/or a raised structure.
9. Connector according to one of claims 1 to 8, characterised in that the base portion (5) is formed to resemble a boat.
10. Pack for medical liquids, and in particular an infusion, transfusion or enteral bag, having at least one connector according to one of claims 1 to 9.