CN201049122Y - Improved infusion and blood transfusion filtering instrument - Google Patents

Abstract

The utility model relates to an improved transfusion filtering apparatus; a filter core structure made of cascading filter material is clamped in a receiving chamber consisting of two layers of plastic piamater material; two piamater materials and the filter core structure are closed through the joint heat-fusion periphery. The piamater materials of two sides of the radial corresponding positions of the receiving chamber are respectively provided with a catheter structure communicated with the inside and the outside of the receiving chamber; the inner mouths of two catheters are positioned in two sides of a filter passage of the filter core structure. The catheters pass through the heat-fused periphery of each receiving chamber; at least the contact part between the catheters and the filter core structure is provided with an auxiliary fusion structure which is easy in heat fusion for the catheters. The filtering apparatus can solve the problems that the heat-fused periphery is easy to produce rosin joint, tack weld and over-weld which are caused by material and contact area among the plastic piamater, the catheters and the filter core, in particular between the catheters and the filter core, and accordingly the inner leakage or the outer leakage of the filtering apparatus, thereby greatly improving the feasibility of the industrialized production and the quality of product.

Description

Improved transfusion and blood transfusion filters

Technical field

This utility model relates to a kind of medical transfusion and blood transfusion filters, and is special but be not limited in the transfusion filter tool of using for the filtering leukocyte.

Background technology

Transfusion and blood transfusion is one of commonly used and important medical procedure.With the blood transfusion is example, and the blood transfusion of which kind of mode or purpose at present no matter generally all needs filtering leukocyte wherein, and therefore corresponding filters is absolutely necessary.

Introduced in the Chinese patent literature of notification number CN2245983Y among a kind of disposable efficient blood exchange transfusion set, what relate to is a kind of except that leukocytic efficient hemofilter, is the functional fiber that is filled with forms such as chemical fibre silk, non-woven fabrics, fusion spray cloth in a pvc pipe shell.Have small gap between its implant and tube wall equally, particularly the static pressure of liquid blood can be big with caliber support when hemofiltration, thereby make the part blood can not be through the filtration of implant and slit flow mistake from the side.The document introduces that its leukocyte removal efficiency is the highest can only to reach 99%, does not also reach the leukocyte remainder less than 2.5 * 10 ⁶National pharmaceuticals industry standard YY0329-2002 " disposable use leucocyte-removing filter " requirement.

The Chinese patent literature of notification number CN2902299Y has been introduced a kind of transfusion and blood transfusion filters, has proposed to be welded to each other heat seal by soft film material and stacked filter element, and the structure of liquid in-out body canal is set at its two ends.Though this structure design principle is feasible, but practice is found, because its used plastics mantle and filter element, and conduit and filter element are inhomogeneous materials, and conduit is normally circular, material for core is generally fibrous materials such as non-woven fabrics, therefore the heat seal performance of removing between unlike material is variant, the form that particularly only limits to usually between conduit and material for core contact with face with line in this narrow range of heat seal periphery is bonded with each other, the heat seal area is far smaller than the bonding area between plastics mantle and filter element, it is the weakest welding heat seal position, thereby often be prone to rosin joint, dry joint or super weldering, and make product percent of pass extremely low and be difficult to meet industrialization and make requirement, its falseness that is difficult for discovering is welded in follow-up high pressure steam sterilization, or high speed centrifugation etc. is when handling, cracking can occur or break away from, and cause filter in use inner side leakage to take place during filter liquide or leak outside.

The utility model content

At this situation, this utility model will provide a kind of improved transfusion and blood transfusion filters, to address the above problem.

The basic structure of the improved transfusion and blood transfusion filters of this utility model, be to be gripped with the filter cartridge construction of being made up of stacked filtering material in the cavity volume that is formed by the two layers of plastic soft film material equally, two soft film material and filter cartridge construction seal through the common heat fused periphery of its periphery.Respectively be provided with a catheter structure that is communicated with inside and outside the cavity volume on the both sides plastics soft film material at the radially relative position place of this cavity volume respectively, the internal orifice of two catheters lays respectively at the two sides that filter cartridge construction filters path.Wherein, pass in the heat fused periphery of this catheter by each cavity volume, and be provided with the place, contact site of filter cartridge construction at it at least and make it be easy to the auxiliary fusion structure that hot melt engages.

The said mode that should assist the fusion structure most convenient, be to adopt the version that can increase heat fused contact area between said catheter and filter cartridge construction, for example, can be the auxiliary fusion structure that is provided with forms such as the sheet that is used to increase its hot melt junction, bar in the mode of catheter periphery to wrap.

Above-mentioned auxiliary fusion structure, can be adopted as to apply, to spray or be folded in layer structures such as meeting medical chemical water preparation, powdery, graininess, thin slice therebetween, as the layer structure of materials such as the polyester that allow to use in the medical apparatus and instruments, polrvinyl chloride, polyphenyl alkene, polypropylene, nylon, its can with this plastics soft film material be material of the same race or material not of the same race but can be with it the material that engages of hot melt mutually.

The concrete shape of this utility model said structure filters is not particularly limited and multiple choices can be arranged, for example currently reported and/or use comprise circle or oval by closed curve around the multiple shape that forms, perhaps be adopted as rhombus, rectangle, square, triangle, multiple rectilinear polygon or the polygonal shape of fillet such as trapezoidal.Said plastics soft film material can be selected in medical field the PVC flexible film, composite plastic flexible film and the tinfoil paper papery flexible film that allow to use, PE flexible film etc. for use.

Owing to be generally circular catheter periphery, particularly and the filter element that differs greatly of its material between be provided with the auxiliary fusion structure that can increase its hot melt bonding area or position, and also can be by the auxiliary fusion structure material with proper property of further selection, therefore when adopting high frequency or industrial conventional equipment such as ultrasonic to weld to make its peripheral heat fused sealing, can improve effectively, particularly can improve heat fused area and welding quality between catheter and filter element greatly, correspondingly solve it again and rosin joint occurred, dry joint or super weldering and the leakage or the problem that leaks outside in the filters that causes have greatly improved the feasibility and the product quality of its suitability for industrialized production.

Below in conjunction with the specific embodiment of accompanying drawing illustrated embodiment, foregoing of the present utility model is described in further detail again.But this should be interpreted as that the scope of the above-mentioned theme of this utility model only limits to following example.Do not breaking away under the above-mentioned technological thought situation of this utility model, various replacements or change according to ordinary skill knowledge and customary means are made all should be included in the scope of the present utility model.

Description of drawings

Fig. 1 is a kind of structural representation of the improved transfusion and blood transfusion filters of this utility model.

The specific embodiment

The structure of the improved transfusion and blood transfusion filters of as shown in the figure this is in the cavity volume that is formed by two layers of plastic soft film material 5, is gripped with the filter cartridge construction 4 that usual manner is made up of stacked filtering materials such as non-woven fabrics.Two soft film material 5 and filter cartridge construction 4 weld its periphery and form the periphery 3 of a common heat fused and seal through high frequency or mode such as ultrasonic.Be opened in the two sides that filter cartridge construction 4 filters paths respectively respectively being provided with an internal orifice that is communicated with catheter structure 1, two catheter inside and outside the cavity volume on the both sides plastics soft film material 5 at the radially relative position place of this cavity volume respectively.Wherein pass in two catheters 1 this heat fused closed perimeter 3 by cavity volume, and at least in itself and heat fused closed perimeter 3 with the place, contact site of filter cartridge construction 4 or adopting to wrap in the form of catheter 1 periphery is provided with the homogeneity that can increase its mutual heat fused junction area or the auxiliary fusion structure 2 of inhomogeneous stratiform form material, for example, can adopt coating, the auxiliary fusion structure 2 of this stratiform that mode is provided with such as spray, insert and put or wrap.

Claims (4)

1. improved transfusion and blood transfusion filters, in the cavity volume that forms by two layers of plastic soft film material (5), be gripped with the filter cartridge construction of forming by stacked filtering material (4), two soft film material (5) and filter cartridge construction (4) seal through the common heat fused periphery (3) of its periphery, on the both sides plastics soft film material (5) at the radially relative position place of this cavity volume, respectively be provided with one respectively and be communicated with the inside and outside catheter structure (1) of cavity volume, the internal orifice of two catheters lays respectively at the two sides that filter cartridge construction (4) filters path, it is characterized in that passing in the heat fused periphery (3) of catheter (1) by each cavity volume, and be provided with at its place, contact site at least and make it be easy to the auxiliary fusion structure (2) that hot melt engages with filter cartridge construction (4).

2. improved transfusion and blood transfusion filters as claimed in claim 1 is characterized in that said auxiliary fusion structure (2) is for increasing the structure of heat fused contact area between said catheter (1) and filter cartridge construction (4).

3. improved transfusion and blood transfusion filters as claimed in claim 1 or 2 is characterized in that said auxiliary fusion structure (2) is for to wrap in the form setting of catheter (1) periphery.

4. improved transfusion and blood transfusion filters as claimed in claim 1 or 2 is characterized in that said auxiliary fusion structure (2) is to apply, to spray or be folded in layer structure therebetween.

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