CN106413775A

CN106413775A - Microfiltration medical infusion connector

Info

Publication number: CN106413775A
Application number: CN201480078730.1A
Authority: CN
Inventors: 陈永曦
Original assignee: Fujian Bestway Medical Polymer Corp
Current assignee: Fujian Bestway Medical Polymer Corp
Priority date: 2014-04-11
Filing date: 2014-04-11
Publication date: 2017-02-15
Anticipated expiration: 2034-04-11
Also published as: CN106413775B; WO2015154304A1

Abstract

A microfiltration medical infusion connector comprising a connector base (3) connected to an extracorporeal catheter component and a connector (1) connected to a medicinal solution infusion apparatus. Infusion channels in communication with each other are provided in cavities of both the connector base (3) and the connector (1). The medical infusion connector comprises a microfilter (2) bridged between the connector base (3) and the connector (1). The microfilter (2) comprises a housing. A cavity of the housing serves as an infusion channel. Fitted therein is a filtration membrane component. A vent hole (213) is provided on the housing. A breathable and liquid-blocking vent plug is provided on the vent hole (213). The medical infusion connector has the advantages of thorough microparticle filtration, increased filtrate flow rate, a compact structure, and convenient use.

Description

Medical infusion joint with precise filtration

Content of the specification

Technical Field

The invention relates to a medical infusion connector, in particular to a precise filtering medical infusion connector.

Background

Intravenous infusion by means of a disposable infusion set is an important method and means indispensable for clinical treatment, and the infusion set is provided with a filtering membrane, but the filtering membrane arranged on the infusion set can only filter particles with the diameter larger than 5 micrometers and particles with the diameter equal to or smaller than 5 micrometers, and the disposable infusion set cannot filter the particles.

The main generation processes of the particles are as follows: firstly, adsorbing substances of plastic particles and infusion bags in the production process; secondly, rubber particles are generated when the bottle inserting needle punctures the rubber plug; fibers, wool and dust particles are generated by contacting with the indoor environment during bag opening and puncturing; carbon black particles, some particles present in the pharmaceutical formulation itself; fifthly, insoluble colloidal particles are generated in the production process of the Chinese herbal medicine preparation due to the limitation of the purification process; sixthly, crystalline particles are generated under the conditions that the storage condition of the medicine is changed and the storage time is increased; seventhly, glass scrap particles which are particles scattered when the ampoule is cut; eighthly, the drug particles are generated due to incomplete dissolution of some powder, physiological action between drugs, solvent change, pH value change and the like when the drugs are added.

Therefore, the filter membrane cannot filter particles generated by bag opening, rubber plug puncture and the like in the infusion process due to the fact that the filter membrane is arranged closer to the front. Once the particles are not filtered, the particles enter the human body through transfusion, and the human body is greatly damaged.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the precise filtering medical infusion connector with thorough filtering of particles.

The object of the present invention is achieved by the following means.

Medical infusion of secondary filter connects, include the connector base of connecing with the external catheter subassembly of keeping somewhere and the connecing of connecing with the liquid medicine transfusion system and connect, the connector base all has the infusion passageway of mutual intercommunication in the two inner chambers of connecing with connecing, and its constitution main points lie in: the precise filter comprises a shell, the inner cavity of the shell is an infusion channel, a filter membrane assembly is arranged in the infusion channel, the shell is provided with an exhaust hole, and an exhaust plug which is permeable and liquid-resistant is plugged in the exhaust hole.

Therefore, when in transfusion, the liquid outlet end of the transfusion device is the puncture needle tube or the external conical joint, the lapel joint of the invention is inserted, and is communicated with the transfusion retention device outside the human body through the filter and the joint base, so that the liquid medicine passes through the transfusion device and then the transfusion joint with the precise filtering function, the liquid medicine is further filtered through the filter membrane component, fine bubbles in the liquid medicine are filtered, the filtered bubbles penetrate through the air-permeable and water-impermeable filter membrane on the upper cover of the filter, and are discharged from the exhaust hole, and the purified liquid medicine enters the blood vessel of the human body, thereby greatly reducing the hidden danger of transfusion reaction caused by particles.

The object of the present invention can also be achieved by the following means.

The bottom of the inner cavity of the shell is in a funnel shape, the filter membrane component is positioned above a triangular cavity at the lower part of the funnel, the bottom of the triangular cavity for collecting filtrate is connected with a funnel mouth, the funnel mouth is exposed out of the shell, and the hollow inner core of the funnel mouth is communicated with the triangular cavity and is a transfusion channel.

The funnel mouth is a conical shape to form a male joint, the upper part of the male joint is close to the outer bottom surface of the shell at a certain interval, a convex ring is arranged, and the male joint and the convex ring form a joint base. The male joint and the convex ring can be directly sleeved with a hose on an indwelling device. Or further specifically

The male joint is movably connected with a fastening nut, the fastening nut is hung on the convex ring, the contact parts of the fastening nut and the convex ring are conjugated, and the male joint, the convex ring and the fastening nut form a joint base.

The convex ring is convenient for the male joint to be inserted into the connecting seat on the appliance, and the conjugate surface of the convex ring is pulled and pressed for sealing when the fastening screw cap is screwed with the connecting seat on the appliance, and the male joint is prevented from being separated from the connecting seat.

The configuration of the housing in combination with the filter membrane assembly can be further optimized as follows:

the shell is provided with an upper cover, the upper cover is fixedly connected with the shell after the assembled filter membrane component is placed in the inner cavity of the shell, the upper cover is provided with a structure connected with the refuting joint, and gaps for flowing of filtrate are formed between the outer side of the filter membrane component or between the outer side of the filter membrane component and the corresponding surfaces of the bottom and the inner cavity of the shell. The further optimization is as follows:

the edge of the top opening of the shell is provided with an inner annular step, the upper edge of the filter membrane component is provided with an outward flange, the flange corresponds to the inner annular step, and the filter membrane component is positioned and fixedly connected in the inner cavity of the shell in a sealing way through the corresponding structure.

Thus, the inner side and the outer side of the filter membrane component can only penetrate through the filter membrane to be communicated.

The filter membrane module can be further optimized as follows:

the filter membrane component comprises a filter membrane support and a filter membrane, the filter membrane is either covered and attached to the outer side face of the filter membrane support or covered and attached to the outer side face and the bottom face of the filter membrane support, and the filter membrane support is either a tetrahedral frame or a cylindrical frame.

It can be further optimized as follows:

the filter membrane component comprises a filter membrane support and filter membranes, four or six or eight sheet-shaped frames are arranged at intervals left and right and fixedly connected to form the filter membrane support, the filter membranes are attached to each sheet-shaped frame, the top center of the filter membrane component is provided with an opening, the bottom two sides of the filter membrane component are provided with openings, a filtrate channel penetrates through an even number of filter membranes left and right through the interval of the two sheet-shaped frames in the middle, passes through the gaps on the corresponding side surfaces of the outer filter membrane and the inner cavity of the shell, downwards passes through the openings on the two sides of the bottom of the filter membrane component.

In this way, the filtrate has two filtration channels, and each channel passes through at least two filter membranes, so that the filtration is thorough and the flow rate of the filtrate is not influenced.

This may also be the case: the filter membrane bracket comprises a left side bracket, a right side bracket and a middle bracket, wherein the side bracket is provided with a frame shaped like a Chinese character 'ri', the lower edge of the bracket is provided with an outward single flange, a filter membrane is covered on the right side frame surface of the bracket, the middle bracket is provided with a lateral U shape and has a certain width, two side walls of the U shape are hollowed into the frame shaped like a Chinese character 'ri' 261, the upper edges of the two side walls of the U shape are provided with symmetrical outward flange edges, the flange edges are provided with a ladder for the side bracket to be fixedly connected and positioned, the filter membrane is covered on the outer frame surface of the U shape, the side bracket and the middle bracket are fixedly connected to form a parallel multi-layer fence-shaped filter layer, the center and two sides of the top of the filter membrane component are opened, the bottom of two adjacent filter membranes on the left and right are.

In this way, it is possible to achieve as small a volume as possible and as large a filtration area as possible, enhancing the filtration capacity of the filter.

The upper cover of the shell is a triangular roof surface, and each inclined surface is connected with a refuting joint to form a double-branch liquid input joint.

One branch may be an infusion connector and the other branch may be an internal conical connector. The input connector can also be an infusion connector with different functions, such as a needleless connector, a positive pressure connector and the like. The liquid input joint can be made separately and then fixed on the fixing hole of the upper cover of the filter, and the liquid outlet of the joint is directly communicated to the other side of the upper cover of the filter. The infusion connector shell can also be manufactured integrally with the upper cover of the filter.

In summary, compared with the prior art, the invention has the following advantages: the filter has the advantages of thorough particle filtration, high filtrate flow speed, compact structure and convenient use.

Drawings

FIG. 1 is a schematic front view of a precision filtration medical fluid infusion connector according to embodiment 1 of the present invention;

FIG. 2 is a schematic view of the precise filtering medical infusion connector and the indwelling needle of embodiment 1 of the present invention;

FIG. 3 is a schematic view of the connection between the precision filtration medical infusion connector and the hose according to example 1 of the present invention;

FIG. 4 is a schematic perspective cross-sectional view of a filter in a precision filtration medical fluid infusion connector according to example 1 of the present invention;

FIG. 5 is a schematic perspective view of the upper cover structure of the filter in the precision filtration medical infusion joint according to embodiment 1 of the present invention;

FIG. 6 is a schematic perspective view of a filter housing of a precision filtration medical fluid infusion connector according to example 1 of the present invention;

FIG. 7 is a schematic perspective sectional view of a filter housing of a precision filtration medical fluid infusion connector according to example 1 of the present invention;

FIG. 8 is a schematic perspective view of a filter membrane holder of a microfiltration medical infusion connector according to embodiment 1 of the invention;

FIG. 9 is a schematic perspective view of a filter membrane assembly of the precision filtration medical infusion connector of example 1 in accordance with the present invention;

FIG. 10 is a schematic view of the filtrate channel of a precision filtration medical infusion connector according to example 1 of the present invention;

FIG. 11 is a front elevational view of a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 12 is a schematic view of the precise filtering medical infusion connector and the indwelling needle in combination with a preferred embodiment of the present invention;

FIG. 13 is a schematic view of the connection of a precision filtration medical fluid infusion connector to a flexible tubing in accordance with a preferred embodiment of the present invention;

FIG. 14 is a schematic view of the connection of the precision filtration medical infusion connector and the dual branch connector according to the preferred embodiment of the present invention;

FIG. 15 is a schematic perspective cross-sectional view of a filter arrangement in a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 16 is a schematic perspective cross-sectional view of another cross-sectional view of a filter in a precision filtration medical infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 17 is a schematic perspective view of a filter cap in a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 18 is a schematic perspective view of a filter housing of a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 19 is a schematic perspective view of a filter housing cover plate in a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 20 is a schematic perspective view of a filter housing lower cover in a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 21 is a schematic perspective cross-sectional view of a filter housing lower cover configuration in a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 22 is a schematic perspective view of a filter membrane holder side bracket structure of a microfiltration medical infusion connector according to the preferred embodiment of the invention;

FIG. 23 is a schematic perspective view of a filter membrane holder mid-frame structure of a microfiltration medical infusion connector according to a preferred embodiment of the invention;

FIG. 24 is a schematic perspective view of a filter membrane assembly in a precision filtration medical fluid infusion connector in accordance with a preferred embodiment of the present invention;

FIG. 25 is a schematic view of the filtrate channel of a precision filtration medical infusion connector in accordance with a preferred embodiment of the present invention.

Description of the reference symbols

1, connecting joints; 2, a filter; 21, covering the upper cover; 211 protruding the lid rim; 212 a fixing hole; 213 air exhaust holes; 22 a housing; 221 a funnel cavity; 222 a male connector; 223 a convex ring; 224 through holes; 225 a triangular cavity; 226 an annular step; 227U-shaped wall; 228 an inner flange; 23, a filter membrane bracket; 231 a tetrahedral frame; 232 a flared flange; 233 left and right side brackets; 234 a middle support; 24, filtering the membrane; 25 a breathable film; 251 a herringbone frame; 252 a flange; 26 a lower cover; 261 a Chinese character 'ri' frame; 262 steps; 263 flange edge; 28 sealing the sheet; 29 a housing cover plate; 3 a joint base; 4 connecting base; 5, a hose; 6, a transfusion joint; 7 inner cone interface.

The invention will be described in more detail below with reference to the accompanying drawings

Detailed Description

Example 1

As shown in figure 1, the invention consists of a connection piece 1, a precision filter 2 and a joint base 3, and is made of medical plastics, medical rubber and a filter membrane. The connector base 3, namely the liquid output end, of the invention is provided with a conical male connector which can be inserted and matched with the input port connecting seat 4 of the indwelling device outside the human body and then locked and fixed by a movable fastening nut in the connector base 3, as shown in figure 2. The male joint of the liquid output end can also be combined with a connecting seat on the indwelling device into a whole and directly fixedly connected with a connecting hose 5, as shown in figure 3.

The connector 1 may be in a single branch form or a multi-branch form, as shown in fig. 1, the connector has two branches, one branch is an infusion connector, and the other branch is an internal conical interface. The input connector can also be an infusion connector with different functions, such as a needleless connector, a positive pressure connector and the like. The liquid input joint can be made separately and then is fixedly connected on the fixing hole of the upper cover of the precision filter, and the liquid outlet of the joint is directly communicated to the other side of the upper cover of the filter. The infusion connector shell can also be manufactured integrally with the upper cover of the filter.

As shown in FIG. 4, the precision filter 2 is composed of an upper cover 21, a housing 22, a filter membrane holder 23, a plurality of precision filter membranes 24, a flexible sealing sheet 28 and a plurality of air-permeable, water-impermeable and air-permeable membranes 25.

As shown in fig. 5, the upper cover is a triangular flat cover, and has a convex cover edge 211, the inclined cover wall is provided with a mounting and fixing hole 212 of the adaptor 1, and is provided with a plurality of exhaust holes 213, and the breathable film 25 is covered and attached to the inner outlet of the exhaust hole 213.

The shell is as shown in fig. 6 and 7, and has a rectangular funnel-shaped shell, the funnel cavity 221 is used for installing the filter layer assembly, the triangular cavity 225 at the lower part of the funnel cavity is convenient for collecting and filtering the liquid medicine, the funnel mouth is a conical shape to form the male connector 222, the upper end of the male connector is at a certain distance from the outer bottom surface of the shell, a triangular convex ring 223 is arranged, the convex ring is convenient for the male connector to be inserted into the connecting seat on the appliance, the conical surface is pulled and pressed to seal when the connecting seat is screwed on the fastening nut and the appliance, and the male connector is prevented from being separated from the connecting seat, the through hole 224 in the male connector is communicated with the funnel cavity, and the.

The membrane support 23 is shown in FIG. 8 as having a tetrahedral frame 231 with a flared lip 232 at the upper edge of the support, and the filtration membrane 24 is attached to the outer frame surface of the support in addition to the upper frame surface of the frame, as shown in FIG. 9. The flared lip on the bracket facilitates secure positioning with the annular step on the upper edge of the filter housing, as shown in fig. 4.

The filter assembly is such that the filter layer assembly is assembled firstly, as shown in fig. 9, the filter layer assembly is installed in the filter shell, the upper flange of the filter membrane bracket is sleeved and fixed with the annular ladder in the filter shell, and is fixedly connected and sealed, so that the inner side and the outer side of the filter layer assembly can only penetrate through the filter membrane to be communicated, then the upper cover of the filter is combined and fixedly connected with each branch joint, the air permeable membrane is covered and adhered at the air permeable hole at the inner side of the upper cover, the movable locking nut is sleeved into the male joint on the filter shell, the male joint convex ring is forcibly sleeved, then the assembled upper cover of the filter is covered, and is fixedly connected and sealed after being aligned with the filter shell, thus the complete infusion joint with the. During use of the fitting, the flow of fluid is as shown in figure 10.

The parts not described in the present embodiment are the same as those in the prior art.

Best mode for carrying out the invention

As shown in figure 11, the invention consists of a connector 1, a precision filter 2 and a connector base 3, and is made of medical plastics, medical rubber and a filter membrane.

As shown in FIG. 12, the connector base 3 of the present invention, i.e., the liquid outlet, has a tapered male connector which is adapted to be inserted into and engaged with the inlet connector 4 of the indwelling device outside the human body and is locked and fixed by a movable locking nut.

As shown in fig. 13, the male connector of the liquid output end can also be integrated with the connecting seat on the indwelling device and directly connected with the connecting hose 5.

The liquid input connector can also be in the form of a plurality of branches, as shown in fig. 14, one branch is the liquid feeding connector 6, and the other branch is the inner conical interface 7. The input connector can also be an infusion connector with different functions, such as a needleless connector, a positive pressure connector and the like. The liquid input joint can be made separately and then is fixedly connected on the fixing hole of the upper cover of the precision filter, and the liquid outlet of the joint is directly communicated to the other side of the upper cover of the filter. The infusion connector shell can also be manufactured integrally with the upper cover of the filter.

As shown in fig. 15 and 16, the precision filter 2 is composed of an upper cover 21, a housing 22, a housing cover plate 29, a lower cover 26, filter film left and right side supports 233, a filter film intermediate support 234, a plurality of precision filter films 24, a flexible seal sheet 28, and a plurality of air-permeable, water-impermeable, air-permeable films 25.

As shown in FIG. 17, the upper cover is a rectangular flat cover, and has a protruding cover edge 211, a transfusion connector mounting fixing hole 212 is provided on the cover wall, and a plurality of air vent holes 213 are provided, and the air permeable membrane 25 is attached to the air vent inner outlet.

The housing is shown in fig. 18 as having an upper case U-shaped wall 227 with an inner flange 228 at the lower edge of the wall.

The housing cover 29 is a rectangular plate having a certain thickness as shown in fig. 19.

The lower cap 24 is provided with a funnel-shaped housing as shown in fig. 20 and 21, the funnel cavity 221 is convenient for collecting and filtering the liquid medicine, the funnel mouth is conical to form a male connector 222, the upper end of the male connector is spaced from the bottom of the lower cap by a certain distance, a triangular convex ring 223 is arranged, the convex ring is convenient for the male connector to be pulled and pressed when the fastening nut is screwed with the upper connecting seat of the apparatus after the male connector is inserted into the upper connecting seat of the apparatus, the male connector is prevented from being separated from the connecting seat, and a through hole 224 in the male connector is communicated with the funnel cavity of the lower. The filter membrane bracket is composed of a left bracket 233, a right bracket 233 and a middle bracket 234, the side brackets are provided with a herringbone frame 251 as shown in figure 22, the lower edge of the bracket is provided with an outward single flange 252, and the filter membrane is covered on the right side frame surface of the bracket; the middle support is shown in figure 23 and has a lateral U-shape and a certain width, two side walls of the U-shape are hollowed into a frame 261 in a shape like a Chinese character 'ri', the upper edges of the two side walls of the U-shape are provided with symmetrical outward flange edges 263, the flange edges are provided with a step 262 so as to be fixedly connected and positioned with the side supports, the filter membrane is covered on the outer frame surface of the U-shape, the side supports and the middle support are fixedly connected to form a parallel multi-layer fence-shaped filter layer, as shown in figure 24, the volume can be reduced as much as possible, the filter area is as large as possible.

The filter combination is that, at first, the filtering layer is combined, a soft sealing sheet is arranged at the U-shaped bottom of the filter shell, the lower edge of the sealing sheet is abutted against and contacted with the upper edge of the inner flange of the shell, then the filtering layer is installed in the filter shell, the lower planes of the lower flanges of the left and right side brackets of the filter are abutted against and contacted with the upper edge of the inner flange of the shell, one end of the filtering layer is contacted with the sealing sheet, the other end of the filtering layer is covered with another sealing sheet, the lower edges of the sealing sheet are flush with the upper edge of the flange of the shell, a cover plate of the shell is covered, the lower edges of the left and right side brackets of the filter are fixedly connected with the shell after being aligned with the shell, the two end sides of the filtering layer are tightly contacted. Then, the upper cover of the filter is combined and fixedly connected with each branch connector, a breathable film is covered at the breathable hole on the inner side of the upper cover, a movable locking nut is sleeved into the lower cover of the filter and is covered with the male connector, the male connector convex ring is forcibly sleeved, then the combined upper cover and the combined lower cover of the filter are covered, the upper cover and the combined lower cover of the filter are aligned with the shell of the filter and are fixedly connected and sealed, and thus the complete infusion connector with the precise filtering function is formed. During use of the fitting, fluid flow is shown in figure 25.

Claims

The precise filtering medical infusion joint comprises a joint base connected with an extracorporeal indwelling catheter component and a connection joint connected with a liquid medicine infusion device, wherein infusion channels communicated with each other are arranged in inner cavities of the joint base and the connection joint.
The precise filtering medical infusion joint as claimed in claim 1, wherein the bottom of the inner cavity of the housing is in a funnel shape, the filter membrane assembly is positioned above a triangular cavity at the lower part of the funnel, the bottom of the triangular cavity for collecting filtrate is connected with a mouth of the funnel, the mouth of the funnel is exposed out of the housing, and the hollow inner core of the funnel is communicated with the triangular cavity and is an infusion channel.
The precision filtration medical infusion connector of claim 2, wherein the funnel mouth is conical to form the male connector, the male connector upper portion is spaced from the housing outer bottom surface, a collar is provided, and the male connector and collar form the connector base.
The precision filtration medical infusion connector of claim 3, wherein the male connector is movably connected to a locking nut, the locking nut is suspended from the collar, the portions of the locking nut in contact with the collar are conjugate to each other, and the male connector, the collar and the locking nut form a connector base.
The precise filtering medical infusion joint as claimed in claim 1, wherein the housing has an upper cover, the upper cover is fixedly connected with the housing after the assembled filter membrane assembly is placed in the inner cavity of the housing, the upper cover is provided with a structure connected with the connector, and gaps for flowing of the filtrate are arranged between the outer side of the filter membrane assembly or the outer side of the filter membrane assembly and the corresponding surface of the bottom and the inner cavity of the housing.
The precision filtration medical infusion connector of claim 5, wherein the top opening edge of the housing is provided with an inner annular step, the upper edge of the filter membrane assembly is provided with a flared flange corresponding to the inner annular step, and the filter membrane assembly is positioned and fixedly sealed in the inner cavity of the housing by the corresponding structure.
The microfiltration medical infusion connector according to claim 1 or 5 or 6, wherein the filter membrane module comprises a filter membrane holder and a filter membrane, the filter membrane is either coated on the outer side surface of the filter membrane holder or coated on the outer side surface and the bottom surface of the filter membrane holder, and the filter membrane holder is either in a tetrahedral frame or in a cylindrical frame.
The medical infusion joint of precise filtration according to claim 1, 5 or 6, wherein the filter membrane assembly comprises a filter membrane support and filter membranes, four or six or eight sheet-shaped frames are arranged at left and right intervals and fixedly connected to form the filter membrane support, the filter membranes are attached to each sheet-shaped frame, the filter membrane assembly has an opening at the top center and two openings at the bottom, and the filtrate channel passes through the interval between the two sheet-shaped frames, penetrates through an even number of filter membranes from left to right, passes through the gap between the outer filter membrane and the corresponding side surface of the inner cavity of the housing, passes through the openings at two sides of the bottom of the filter membrane assembly, and is connected with the outlet at the bottom of the inner cavity.
The microfiltration medical infusion connector as claimed in claim 1, 5 or 6, wherein the filter membrane module comprises a filter membrane holder and a filter membrane, the filter membrane holder is composed of a left side holder, a right side holder and a middle holder, the side holders are provided with a frame shaped like a Chinese character 'ri', the lower edge of the holder is provided with an outward single flange, the filter membrane is attached to the right side frame surface of the holder, the middle holder is provided with a lateral U shape and has a certain width, two side walls of the U shape are hollowed out to form a frame shaped like a Chinese character 'ri' 261, the upper edges of the two side walls of the U shape are provided with symmetrical outward flange edges, the flange edges are provided with a step for fixedly connecting and positioning the side holders, the filter membrane is attached to the outer side frame surface of the U shape, the side holders and the middle holder are fixedly connected to form a parallel multi-layer fence-shaped filter layer, the top, each filter membrane passes through one filter membrane, downwards passes through the bottom openings of the left and right adjacent filter membranes, and is connected with the bottom outlet of the inner cavity of the shell.
The precision filtration medical infusion connector of claim 1, wherein the housing top cover is a triangular roof surface, and a connector is connected to each inclined surface to form a dual-branch type liquid infusion connector.