CN201049123Y

CN201049123Y - Filtering instrument for infusion and blood transfusion

Info

Publication number: CN201049123Y
Application number: CNU200720080302XU
Authority: CN
Inventors: 王新平
Original assignee: GUANGZHOU SUICHANG BIOLOGICAL TECHNOLOGY Co Ltd
Priority date: 2007-07-16
Filing date: 2007-07-16
Publication date: 2008-04-23
Anticipated expiration: 2017-07-16

Abstract

The utility model relates to a filtering apparatus for transfusing liquid and blood. 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 material and the filter core structure are closed through the joint heat-fusion periphery. The plastic piamater materials of two sides 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 the catheter structures are respectively positioned on two sides of a filter passage of the filter core structure, wherein, the inner mouth ends of two catheter structures are respectively and closely jointed on the liquid outlet parts arranged on the plastic piamater materials on two sides through a connecting structure. The form of the structure fully overcomes the fateful disadvantages of rosin joint, tack weld and over-weld caused by inhomogeneous material or small hot joining area between the filter core and the plastic pieces such as catheter in the prior filtering apparatus at present, thereby the quality of product can be guaranteed reliably.

Description

The filters that transfusion and blood transfusion is used

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, and 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 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 is equally in the cavity volume that is formed by two layers of plastic soft film material (as medical PVC commonly used etc.), is gripped with the filter cartridge construction of being made up of stacked filtering material.The soft film material in two outsides and the periphery of this filter cartridge construction with the common mutual interfused periphery that forms of hot melting way, are closed in the cavity volume between two plastics soft film material this filter cartridge construction through high-frequency apparatus etc.Respectively be provided with a catheter structure that is communicated with inside and outside the cavity volume on the plastics soft film material of the both sides of this cavity volume respectively, the internal orifice of two catheters lays respectively at the two sides that filter cartridge construction filters path.Wherein, the internal orifice end of said this two catheter structure is bonded on the liquid entrance position of offering on its place side soft film material through syndeton respectively in tight mode.

In the said structure, fluid-tight engagement mode between said syndeton and side soft film material, can adopt with bonding materials such as binding agents its mutual close adhesion, but best mode, be to make syndeton and soft film material adopt homogeneous material, as all adopting materials such as medical PVC commonly used, and make to form closely therebetween by hot melting way and engage.

For realizing and guarantee the fluid-tight engagement between this syndeton and side soft film material, said this syndeton is except that should be able to being connected with the port of catheter structure is reliable, also should have enough big bonding area, therefore be good with the syndeton that adopts sheet form, can guarantee with the soft film material positive engagement in, can also reduce the gross thickness of the thickness and the filters of this syndeton as far as possible, be more convenient for storing and using.

On the basis of said structure, the profile of the profile of said this soft film material and filters in the filters that this utility model transfusion and blood transfusion is used, can adopt as comprise the knuckle or the fillet polygonal shape of triangle, tetragon etc. according to the use needs, or adopt as comprise the smooth surface shape of circle, ellipse.

Because the catheter structure in this utility model said structure form filters, be through the outside of syndeton fluid-tight engagement in soft film material, be not in contact with one another with the filter cartridge construction that is closed in the cavity volume, thereby avoided in the present conventional filter working of plastics such as catheter and filter element because of mortality defectives such as homogeneous material or the too small rosin joint that easily causes of its thermal bonding area, dry joint and super weldering not fully, product quality is reliably guaranteed.

Below, foregoing of the present utility model is described in further detail again by the specific embodiment by the accompanying drawing illustrated embodiment.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 front status architecture sketch map of this utility model filters.

Fig. 2 is the sketch map of the A-A cross-section structure of Fig. 1.

The specific embodiment

The filters that this utility model transfusion and blood transfusion is as shown in the figure used is a fillet quadrangle form.In the cavity volume that forms by two layers of plastic soft film material 5 in the usual way, be gripped with the filter cartridge construction of forming by stacked filtering material 4.Through high-frequency apparatus in this two soft film material 5 at the peripheral region of filter cartridge construction 4 with the common flat-shaped or step-like peripheral structure 3 that forms a heat fused of hot melting way, filter cartridge construction 4 is enclosed in the cavity volume of two soft film material 5.The width of peripheral structure 3 can be provided with on the heat fused mould as required in advance.Respectively be provided with a catheter structure 1 that is communicated with inside and outside the cavity volume on the both sides of this cavity volume plastics soft film material 5 respectively, the internal orifice of two catheters lays respectively at the two sides that filter cartridge construction 4 filters path, and its internal orifice end is bonded on the liquid entrance position of offering on its place side soft film material 5 through syndeton 2 respectively in tight mode.This syndeton 2 is a homogeneous material with soft film material 5, and be arranged on the port position of catheter structure 1 and make it become an integral form structure through the injection moulding mode, and this syndeton 2 is for having enough laminated structures of big bonding area, fluid-tight engagement reliability during with assurance and 5 heat fuseds of soft film material.

Claims

1. the filters used of transfusion and blood transfusion, 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 of this cavity volume plastics soft film material (5), 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 the internal orifice end of two catheter structures (1) is bonded on the liquid entrance position of offering on its place side soft film material (5) through syndeton (2) respectively in tight mode.

2. the filters that transfusion and blood transfusion as claimed in claim 1 is used is characterized in that said syndeton (2) is for being connected catheter structure (1) port and having enough laminated structures of big bonding area.

3. the filters that transfusion and blood transfusion as claimed in claim 1 or 2 is used is characterized in that the fluid-tight engagement for being formed with hot melting way by homogeneous material between said syndeton (2) and soft film material (5).

4. the filters that transfusion and blood transfusion as claimed in claim 1 or 2 is used, it is characterized in that said soft film material (5) profile is knuckle or the fillet polygonal shape that comprises triangle, tetragon, or comprise the smooth surface shape of circle, ellipse.

5. the filters that transfusion and blood transfusion as claimed in claim 3 is used is characterized in that said soft film material (5) profile is knuckle or the fillet polygonal shape that comprises triangle, tetragon, or comprises the smooth surface shape of circle, ellipse.