CN201098398Y - Medical artificial kidney membrane tube outside blood channel dialysis filter - Google Patents

Abstract

The utility model relates to a medical membrane tube external blood stream dialysis strainer for an artificial kidney. A left end cover which is communicated with a casing and is provided with a dialysate outlet pipe is glued to the left end of the casing, and a right end cover which is communicated with the casing and is provided with a dialysate inlet pipe is glued to the right end of the casing; a blood inlet pipe and a blood outlet pipe communicated with the casing are radially arranged on the casing, the outlet of the blood inlet pipe is a diffusion type pipe, the inlet of the blood outlet pipe is a convergent type pipe, the blood inlet pipe is arranged on the outside of the casing, the blood outlet pipe is arranged on the outsides of the casing in different directions on the same plane, and a hollow fiber pipe is axially arranged in the casing. Compared with the prior medical artificial kidney dialyzer, the medical artificial kidney membrane tube external blood stream dialysis strainer has the advantages of simple structure, high blood flow velocity, short dialysis time, good dialysis effect, long service life and practicability without blood coagulation phenomenon, etc. The medical membrane tube external blood stream dialysis strainer for the artificial kidney lays the foundation for producing a future dialyzer with thin membrane, miniature dialysis pressure and micro-hemodynamics and can be generalized for clinic use.

Description

The outer bloody path dialysis filter of medical artificial kidney film pipe

Technical field

This utility model belongs to medical attraction or pumping tool technical field, is specifically related to the dialyser of artificial kidney axial flow dialysis solution.

Background technology

At present both at home and abroad at the laboratory and the artificial kidney dialyser of use clinically, its structure is that the hollow fibre pipe is installed in housing, blood feed tube, the other end are installed on an axial end cap of housing cover to install and educate the blood drain pipe, the radially side of housing be equipped with the dialysis solution drain pipe, in addition-side is equipped with the dialysis solution feed tube.The artificial kidney dialyser of this structure, after patients'blood is drawn from tremulous pulse by blood pump during use, continuously flow to the artificial kidney dialyser and advance the blood feed tube, flow through in the hollow fibre pipe, after filtering, the hollow fibre pipe flows back to patient's vein blood vessel from the blood drain pipe, the dialysis machine of dialysis solution through being connected with the artificial kidney dialyser is to its temperature, concentration, flow, pressure is adjusted the back and is flowed in the housing from the dialysis solution feed tube, flow through from the gap between the hollow fibre pipe, blood and dialysis solution are under the pressure effect of osmotic pressure and dialysis solution, toxin and moisture content in the blood exchange, and the dialysis solution that contains toxin is discharged from drain pipe.

The internal diameter of the hollow fibre pipe of above-mentioned artificial kidney dialyser is that 2001 μ m, wall thickness are 40 μ m, in use, the time of each dialysis treatment is 4～5 hours, very easily cause blood coagulation, with hollow fibre pipe plug plug, to the patient who dialyses for a long time, the artificial kidney dialyser will use repeatedly, increase along with access times, part hollow fibre pipe plug plug, be difficult to during flushing the blood coagulation in the hollow fibre pipe is rinsed well, make the effective area of hollow fibre pipe reduce, have influence on clinical therapeutic efficacy.Because the pressure of hollow fibre pipe inner blood the hollow fibre tracheal rupture often occurs greater than the pass through inside pressure of clear liquid of hollow fibre pipe, causes the artificial kidney dialyser to be damaged.

Above-mentioned artificial kidney dialyser blood is fashionable from axial flow, because the internal diameter of hollow fibre pipe is very little, resistance is very big, and blood can not flow through in the hollow fibre pipe for the moment, in use, a large amount of blood coagulations appears in the end that often appears at hollow fibre pipe in the housing, once blood coagulation occurs, need stop dialysis, to doubt blood removes clean, dialyse, when being used for the patient of heparinization, blood coagulation is even more serious again.

Designer of the present utility model once designed the name be called " medical artificial kidney axial flow dialysis solution dialyser ", the patent No. is the utility model patent of 200320109687.X.The hollow fibre pipe is installed in housing, sealing gasket is equipped with at the two ends of hollow fibre pipe, two ends end cap and housing pass through thread connection, the import of the outlet of blood feed tube and blood drain pipe is a straight pipeline, blood can not flow into liquid outlet from inlet very smoothly during dialysis, at the intravital two ends of shell cavity is arranged, form very big space between the import of the outlet of blood feed tube and blood drain pipe and the hollow fibre pipe, when dialysis, form a lot of hematoceles, need after each dialysis the end cap at two ends is taken down, the hematocele complete liquidation is fallen, can be caused patient's anemia equally.Blood feed tube and blood drain pipe are arranged on the same side of housing, and by the shortest path flow, the impurity in the blood can not be filtered blood flow completely, is unfavorable for patient's health when the hollow fibre pipe.

Summary of the invention

Technical problem to be solved in the utility model is the shortcoming of above-mentioned technology, provide-kind of permeability is good, high efficiency, dialysis time is short, dialysis-effect good, long service life, the practical outer bloody path dialysis filter of medical artificial kidney film pipe.

Solving the problems of the technologies described above the technical scheme that is adopted is: the left end of housing stick with glue be connected to housing in link the left end cap of dialysis solution drain pipe be installed, right-hand member stick with glue be connected to housing in link the right end cap of dialysis solution feed tube be installed, on housing, radially establish with housing in the blood feed tube and the blood drain pipe that link, outlet in the blood feed tube is the divergent contour pipe, import in the blood drain pipe is the convergent contour pipe, the blood feed tube is arranged on the outside on the housing, the blood drain pipe is arranged on that in the same plane outside of different directions on the housing, axially is provided with the hollow fibre pipe in housing.

The angle of the centrage of the centrage of blood feed tube of the present utility model and blood drain pipe is 180 °.

This utility model is compared with " medical artificial kidney axial flow dialysis solution dialyser ", blood feed tube and blood drain pipe are arranged on conplane both sides on the housing, increased blood mobile flow process between the hollow fibre pipe, blood can well be filtered, the outlet of blood feed tube is the divergent contour pipe, the import of blood drain pipe is the convergent contour pipe, reduced the liquid stream dynamic resistance of blood, improved blood flow rate, there is not cavity between in blood feed tube and blood drain pipe and the housing, blood can not solidify, solved the impaired drawback of dialysis patient hemocyte in dialysis procedure, avoided in dialysis procedure hollow core fiber pipe and blood coagulation phenomenon that the hollow fibre tube end occurs, shorten dialysis time, prolonged the service life of dialyser.Sealing gasket is not installed at the two ends of hollow fibre pipe in the housing, and two end cap and housing employing adhesive attachment make the simple in structure of dialyser.The utlity model has simple in structure, advantages such as blood flowing speed is fast, dialysis time is short, dialysis-effect is good, long service life, practicality, thin film, microdialysis will be pressed in order to produce from now on, little hemodynamic dialyser is established the material basis, can promote the use of clinically.

Description of drawings

Fig. 1 is the structural representation of an embodiment of this utility model.

The specific embodiment

Below in conjunction with drawings and Examples this utility model is advanced-go on foot detailed description, but this utility model is not limited to these embodiment.

In Fig. 1, the outer bloody path dialysis filter of the medical artificial kidney film pipe of present embodiment is made of housing 1, left end cap 2, blood feed tube 3, hollow fibre pipe 4, blood drain pipe 5, right end cap 6, dialysis solution feed tube 7,8 connections of dialysis solution drain pipe.

In housing 1, be axially installed with hollow fibre pipe 4, hollow fibre pipe 4 is the hollow semi-permeable membrane fibers that is, its internal diameter is that 200 μ m, wall thickness are 40 μ m, the left end of housing 1 stick with glue connect be connected with left end cap 2, right-hand member sticks with glue to connect and is connected with right end cap 6, be linked as at left end cap 2 outer face axial centre line positions and left end cap 2-body has dialysis solution drain pipe 8, link in dialysis solution drain pipe 8 and the housing 1, at right end cap 6 outer face axial centre line positions and the right end cap 6 dialysis solution feed tube 7 that has been connected as a single entity, link in dialysis solution feed tube 7 and the housing 1.Left radial outside housing 1 and housing 1 be linked as-and body has blood feed tube 3, link in blood feed tube 3 and the housing 1, the outlet of blood feed tube 3 is the divergent contour pipe, right radial outside housing 1 and the housing 1 blood drain pipe 5 that has been connected as a single entity, link in blood drain pipe 5 and the housing 1, the import of blood drain pipe 5 is the convergent contour pipe, end in the import of the outlet of blood feed tube 3 and blood drain pipe 5 and the housing 1 does not have cavity, when dialysing, the end that blood can not rest in the housing 1 forms blood coagulation.Blood drain pipe 5 is installed in blood feed tube 3 that in the same plane both sides on the housing 1, and the angle between the centrage of the centrage of blood feed tube 3 and blood drain pipe 5 is 180 °.Blood feed tube 3 links by conduit and blood pump and patient's arteries during use, and blood drain pipe 5 links by conduit and patient's vein blood vessel, and dialysis solution feed tube 7 and dialysis solution drain pipe 8 link by conduit and dialysis machine.The artificial kidney dialyser of this structure, blood flows into from the blood feed tube 3 of housing 1, enter the space of flowing through in the housing 1 between the hollow fibre pipe 4, flow back into patient's vein blood vessel from blood drain pipe 5, dialysis solution flows into from dialysis solution feed tube 7, enters hollow fibre pipe 4 inner chambers of flowing through in the housing 1, discharges from dialysis solution drain pipe 8, toxin in the patient blood and moisture content are exchanged, and the dialysis solution that contains toxin excretes.The dialyser of this structure, increased the flow process of blood between the hollow fibre pipe, blood can well be filtered, the outlet of blood feed tube 3 is a divergent contour, the import of blood drain pipe 5 is the convergent contour pipe, reduced the liquid stream dynamic resistance of blood, improved blood flow rate, there is not cavity between in blood feed tube 3 and blood drain pipe 5 and the housing 1, blood can not solidify, and has solved the impaired drawback of dialysis patient hemocyte in dialysis procedure, has avoided the blood coagulation phenomenon that occurs with hollow fibre pipe 4 ends between dialysis procedure hollow core fiber pipe 4, shorten dialysis time, prolonged the service life of dialyser.

Claims (2)

1, the outer bloody path dialysis filter of-kind of medical artificial kidney film pipe, the left end of housing [1] be provided with housing [1] in the left end cap [2] that links dialysis solution drain pipe [8] are installed, right-hand member be provided with housing [1] in the right end cap [6] that links dialysis solution feed tube [7] are installed, on housing [1], radially establish with housing [1] in the blood feed tube [3] and the blood drain pipe [5] that link, in housing [1], axially be provided with hollow fibre pipe [4], it is characterized in that: the outlet in the said blood feed tube [3] is the divergent contour pipe, import in the blood drain pipe [5] is the convergent contour pipe, and blood feed tube [3] is arranged on the outside on the housing, blood drain pipe [5] is arranged on that in the same plane outside of different directions on the housing; The left end of said housing [1] and left end cap [2] stick with glue in succession and are one in succession for one, right-hand member and right end cap [6] stick with glue.

2, according to the outer bloody path dialysis filter of the described medical artificial kidney film pipe of claim 1, it is characterized in that: the angle of the centrage of the centrage of said blood feed tube [3] and blood drain pipe [5] is 180 °.

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