Transfusion set with multilayer composite conduit

Abstract

The invention relates to a transfusion set with a multilayer composite conduit, which comprises a bottle plug puncture set, a conduit, a dropping funnel, a transfusion needle and the like, and is characterized in that the conduit is a hollow hose which is formed by co-extruding at least two high polymer material layers comprising an inner layer and an outer layer, wherein the tubular outer surface of the inner layer is completely closed by the outer layer, and the conduit is bonded with the dropping funnel by directly extending into the dropping funnel or the conduit and the dropping funnel are communicated through a connector. Through the structural principle, when the conduit is manufactured, the bidirectional adaptability of performance and process can be realized by selecting different materials in a coextrusion mode, i.e. a material having low adsorption or non-adsorption characteristic for a medicament is selected as the inner layer of the conduit, such as polyurethane PU, polypropylene PE or modified polypropylene TPEE and the like to satisfy the performance requirement of no medicament adsorption or light shielding agent leakage prevention and adapt to a traditional production process in a lower-cost mode.

Description

technical field

[0001] The invention relates to the technical field of medical devices, in particular to an infusion set for a multilayer composite catheter. Background technique

[0002] Existing infusion sets are generally made of catheters made of a single material. The material is mainly PVC, and some special materials are also made, such as PU, TPEE, PE, etc., but they are all single-layer catheters made of a single material. device. At present, there are three major application problems in these infusion sets. One is that the infusion set of the PVC catheter and some drugs (such as diazepam, paclitaxel, insulin, nitric anhydride, etc.) have an adsorption effect, resulting in drug failure; the other is that other non-PVC Although the infusion set of the catheter (such as PU, TPEE, PE, etc.) does not absorb drugs, there is a relatively large gap with the existing technology because the processing technology is complicated and cumbersome, and the adhesive is difficult to...

Examples

Embodiment 1

[0026] Such as Figure 1 ~ Figure 3 The multi-layer composite catheter infusion set shown mainly includes a catheter 1 , a dropping funnel 2 and a coupling device 3 . Such as figure 1 As shown, the catheter 1 is a hollow hose made of a superposition of layers, at least two in number, consisting of an inner layer 12 and an outer layer 11 which completely closes the tubular outer surface of the inner layer 12 . Such as figure 2 As shown, the dripping funnel (2) is made of overlapping layers, and its number of layers is at least two layers, consisting of the dripping funnel inner layer (22) and the dripping funnel outer layer (21), the dripping funnel outer layer (21 ) completely encloses the outer surface of the dropping funnel inner layer (22). Such as image 3 As shown, as shown in Figure X, the hose (4) of the infusion needle is a hollow hose made of overlapping layers, and the number of layers is at least two layers, consisting of the inner layer of the hose (42) and th...

Embodiment 2

[0030] Such as Figure 1 ~ Figure 3 The multi-layer composite catheter infusion device shown, on the basis that the structure is completely consistent with Embodiment 1, is used as a multi-layer composite catheter infusion device that prevents drug adsorption and simultaneously obtains the same process adaptability as the existing process. The above-mentioned catheter 1. Both the dripping funnel 2 and the infusion needle flexible tube 4 should be preferably two layers, because the materials of each layer of the conduit (1) or the dripping funnel (2) or the flexible pipe (4) are from the inside to the bottom according to the order of the layers. Correspondingly, the inner layer 12 of the catheter, the inner layer 22 of the drip funnel and the inner layer 42 of the infusion needle hose are all non-PVC materials with non-absorbing drug properties, such as PU; the outer layer 11 of the catheter, the outer layer 21 of the drip funnel and the infusion solution The outer layer 41 of ...

Embodiment 3

[0033] Such as Figure 1 ~ Figure 4 The multi-layer composite catheter infusion device shown is based on the fact that the laminated structure is basically consistent with that of Example 1, as a multi-layer composite catheter infusion device that prevents drug adsorption and simultaneously obtains the same process adaptability as the existing process, the above-mentioned Conduit 1, drip funnel 2 and infusion needle flexible tube 4 all should be preferably two-layer, because the material of each layer of described conduit (1) or drip funnel (2) or flexible pipe (4) is according to the order of layers from inner to outer. Correspondingly to the outside, the catheter inner layer 12, the drip funnel inner layer 22 and the infusion needle hose inner layer 42 are all non-PVC materials with non-adsorbing drug properties, such as PE; the catheter outer layer 11, the drip funnel outer layer 21 and the The outer layer 41 of the infusion needle hose is made of PVC. Since the PE materia...

technical field

[0001] The invention relates to the technical field of medical devices, in particular to an infusion set for a multilayer composite catheter. Background technique

[0002] Existing infusion sets are generally made of catheters made of a single material. The material is mainly PVC, and some special materials are also made, such as PU, TPEE, PE, etc., but they are all single-layer catheters made of a single material. device. At present, there are three major application problems in these infusion sets. One is that the infusion set of the PVC catheter and some drugs (such as diazepam, paclitaxel, insulin, nitric anhydride, etc.) have an adsorption effect, resulting in drug failure; the other is that other non-PVC Although the infusion set of the catheter (such as PU, TPEE, PE, etc.) does not absorb drugs, there is a relatively large gap with the existing technology because the processing technology is complicated and cumbersome, and the adhesive is difficult to...

Examples

Embodiment 1

[0026] Such as Figure 1 ~ Figure 3 The multi-layer composite catheter infusion set shown mainly includes a catheter 1 , a dropping funnel 2 and a coupling device 3 . Such as figure 1 As shown, the catheter 1 is a hollow hose made of a superposition of layers, at least two in number, consisting of an inner layer 12 and an outer layer 11 which completely closes the tubular outer surface of the inner layer 12 . Such as figure 2 As shown, the dripping funnel (2) is made of overlapping layers, and its number of layers is at least two layers, consisting of the dripping funnel inner layer (22) and the dripping funnel outer layer (21), the dripping funnel outer layer (21 ) completely encloses the outer surface of the dropping funnel inner layer (22). Such as image 3 As shown, as shown in Figure X, the hose (4) of the infusion needle is a hollow hose made of overlapping layers, and the number of layers is at least two layers, consisting of the inner layer of the hose (42) and th...

Embodiment 2

[0030] Such as Figure 1 ~ Figure 3 The multi-layer composite catheter infusion device shown, on the basis that the structure is completely consistent with Embodiment 1, is used as a multi-layer composite catheter infusion device that prevents drug adsorption and simultaneously obtains the same process adaptability as the existing process. The above-mentioned catheter 1. Both the dripping funnel 2 and the infusion needle flexible tube 4 should be preferably two layers, because the materials of each layer of the conduit (1) or the dripping funnel (2) or the flexible pipe (4) are from the inside to the bottom according to the order of the layers. Correspondingly, the inner layer 12 of the catheter, the inner layer 22 of the drip funnel and the inner layer 42 of the infusion needle hose are all non-PVC materials with non-absorbing drug properties, such as PU; the outer layer 11 of the catheter, the outer layer 21 of the drip funnel and the infusion solution The outer layer 41 of ...

Embodiment 3

[0033] Such as Figure 1 ~ Figure 4 The multi-layer composite catheter infusion device shown is based on the fact that the laminated structure is basically consistent with that of Example 1, as a multi-layer composite catheter infusion device that prevents drug adsorption and simultaneously obtains the same process adaptability as the existing process, the above-mentioned Conduit 1, drip funnel 2 and infusion needle flexible tube 4 all should be preferably two-layer, because the material of each layer of described conduit (1) or drip funnel (2) or flexible pipe (4) is according to the order of layers from inner to outer. Correspondingly to the outside, the catheter inner layer 12, the drip funnel inner layer 22 and the infusion needle hose inner layer 42 are all non-PVC materials with non-adsorbing drug properties, such as PE; the catheter outer layer 11, the drip funnel outer layer 21 and the The outer layer 41 of the infusion needle hose is made of PVC. Since the PE materia...

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