JPH0338859B2 - - Google Patents

Description

[Detailed Description of the Invention] Background of the Invention (1) Technical Field The present invention relates to a blood bubble remover used in a blood circuit, etc. to remove bubbles from the blood as well as foreign substances from the flowing fluid. Regarding the manufacturing method.

(2) Prior art and its problems Conventionally, the method for manufacturing a blood bubble remover used as part of a blood circuit is to insert-mold a mesh and then insert it into a tubular blood bubble remover body. A widely used method has been to press-fit the bag-like mesh into one end, or to sandwich the bag-like mesh into the body of the blood bubble remover and fuse and fix it using a high-frequency welder.

However, the former method, which involves insert molding of the filtration net, has the disadvantage of a complicated manufacturing process and high cost, while the latter method, which uses high-frequency welding, can cause liquid leakage due to cracks in the fused part, and There are problems such as poor appearance due to burning. Furthermore, the conventional manufacturing method of the blood bubble remover has problems such as displacement of the filter member and deformation during high-pressure steam sterilization. Further, in the conventional blood bubble remover, a dead space remains in the fixed portion of the mesh, and there is a problem in that blood convection occurs in this space and blood coagulation occurs.

Purpose of the Invention The present invention was made with the aim of solving the drawbacks and problems of the method of manufacturing a blood bubble remover as described above, and without using an insert molding method or a high frequency fusion method. The object of the present invention is to provide a blood bubble remover that is easy to manufacture and has no fear of displacement or deformation of a filtering member, and a method for manufacturing the same.

That is, the present invention applies a bag-like filtration net to a thermoplastic resin cylinder provided with a filtration net support means by ultrasonic welding so as to cover the open end of the cylindrical body. fixing the mesh; and fluid-tightly fitting the barrel into one open end of the bubble eliminator such that the barrel is located within the body of the tubular blood bubble remover; a step of liquid-tightly fitting a first cap equipped with a tube connection port into the one open end of the blood bubble remover body; and a step of fitting the tube into the other open end of the blood bubble remover body. The present invention provides a method for manufacturing a blood bubble remover, which comprises the step of fitting a second cap provided with a connection port in a liquid-tight manner.

Further, the present invention provides the method for manufacturing the air bubble remover, characterized in that the filtering net support means comprises a plurality of filtering net supporting ribs extending in the longitudinal direction of the cylinder from one open end of the cylinder. It provides:

Furthermore, the present invention includes a thermoplastic resin cylinder provided with a filter net support; covering the entire filter net support to cover one open end on the distal end side of the cylinder; A fixed filtering net; a tubular body having openings at both ends, housing the cylinder inside, and having the base of the cylinder fitted in one open end in a liquid-tight manner; air bubbles in the blood; a first cap liquid-tightly fitted to the one open end of the bubble remover body and provided with a tube connection port; a first cap liquid-tightly fitted to the other open end of the bubble remover body; A second cap fitted into the cap and having a tube connection port is provided.

DETAILED DESCRIPTION OF THE INVENTION This description will now be described with reference to illustrated embodiments.

First, a cylinder 2 made of thermoplastic resin as shown in FIG. 2 is molded. As shown in the figure, this cylinder 2 is formed integrally with a cylinder main body with openings at both ends, and extends at equal intervals in the longitudinal direction of the cylinder from one open end of the cylinder main body. It consists of four filter net support ribs 3 that extend out. This cylindrical body 2 is made by integral molding, for example, by injection molding. As the material for the cylinder 2, any thermoplastic resin such as polypropylene, polyvinyl chloride, nylon, terephthalate resin, etc. can be used. It should be noted that the number and length of the ribs 3 may be within a range that can sufficiently maintain the shape of the filter net, which will be described later.

Next, as shown in FIG. 1, the opening edge (i.e., the hem) 1a of the bag-like filter net 1 is attached to the opening of the tube 2 so as to cover the four filter net support ribs 3 of the tube 2. It is overlapped with the end surface 2a (that is, the outer annular stepped portion of the base of the filter net support rib 3 as shown in FIG. 7), and then a cylindrical ultrasonic horn or the like is applied to that portion for ultrasonic welding.

The material for the bag-like filtering net 1 is preferably a thermoplastic resin that is relatively inert to blood, such as nylon or polyester. A method for manufacturing the bag-like filtering net 1 includes, for example, stacking two mesh-shaped sheets of thermoplastic resin, punching them into a predetermined bag-like shape, and simultaneously heat-sealing the punched edges; Alternatively, any other method may be adopted.

When the filtration member A assembled in this way is to be assembled, for example, as a bubble remover in the blood of a blood circuit, the filtration member A is first press-fitted into one open end of the cylindrical tube main body 4 as shown in FIG. (or via an adhesive if necessary) to bring the circumferential surface of the cylinder 2 and the inner wall surface of the tube body 4 into fluid-tight contact. In this case, as shown in the figure, an annular step 2b may be provided at the base of the cylindrical body 2, and this may be used as a stopper to be brought into close contact with the opening end of the tube body 4 (see FIG. 4).

Next, as shown in FIG. 5, a cap 5 having a tube connector port 5a is fluid-tightly fitted to the end of the tube body 4 into which the filtration member A has been press-fitted, using an adhesive or by ultrasonic welding. (See Figure 7).

Furthermore, after the filter member A is attached to the other end of the tube body 4, or in advance, a cap 6 with a desired number of ports 6a and 6b protruding thereon is attached as shown in FIG.
is also applied using adhesive or ultrasonic welding, and the assembly of the blood bubble remover is completed.

As shown in Figure 6, the blood bubble remover assembled in this way has tubes 7, 8, and 9 connected to the caps 5 and 6, respectively, so that the blood, etc. can flow in the direction of the arrow. Become.

Specific Effects of the Invention As detailed above, according to the method of manufacturing a blood bubble remover for removing air bubbles in blood and foreign substances in circulating fluid, the bag-like filtering net The hem of the filter is ultrasonically fused to the cylinder having ribs that maintain the shape of the filter net.
It is possible to avoid the conventional problems such as liquid leakage due to cracks in the welded part of the filter mesh and poor appearance due to burnt parts of the welded part.Furthermore, the cylinder body is equipped with multiple filter mesh support ribs as described above. By using the provided filter, it becomes easy to position the filter net, and problems such as misalignment of the filter net and deformation during high-pressure steam sterilization can be solved. Furthermore, according to the bubble remover of the present invention, there is no dead space at the hem of the bag-like filtration net as in the conventional case, so there is no risk of blood convection and, therefore, no risk of blood coagulation.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a filtration member according to the present invention, FIG. 2 is a perspective view showing a core member portion of the filtration member of FIG. 1, and FIG. 3 is a perspective view of the filtration member of FIG. Perspective view showing how it is assembled into the main body, No. 4
The figure is a perspective view showing the state after the filtering member of FIG. 1 is assembled into the body of the bubble remover in blood, and FIG. 5 is a perspective view showing the state where the cap is assembled into the body of the bubble remover of FIG. 4. FIG. 6 is a plan view showing the state of the blood bubble remover after assembly, and FIG. 7 shows the filtration member of the present invention being assembled into the blood bubble remover.
Furthermore, it is a sectional view of the main part showing the state after the cap is inserted. In the figure, 1... bag-like filtration net, 1a... opening edge,
2... Cylindrical body, 2a... Opening end surface, 2b... Annular step, 3... Filter net support rib, 4... Tube body, 5... Cap, 5a... Tube connector port, 6... Cap, 6a, 6b...Port, 7, 8, 9...Tube.

Claims (1)

[Scope of Claims] 1. It has a cylindrical shape with both ends open, and one of the open ends has a filter mesh support made of a plurality of filter mesh support ribs extending in the longitudinal direction of the cylinder. A bag-like filtration net is placed on a thermoplastic resin cylindrical body so as to cover the one open end of the cylindrical body as well as the entire filtration net support rib, and the filtration net is attached to the cylindrical body by ultrasonic welding. fixing it to one open end of the air bubble remover, and turning the cylinder with the filtration mesh support rib side facing inward so that the cylinder is located within the main body of the blood bubble remover. a step of liquid-tightly fitting a first cap provided with a tube connection port into the one open end of the blood bubble remover main body; A step of liquid-tightly fitting a second cap equipped with a tube connection port to the other open end of the blood bubble remover main body; How to make the utensils. 2. A cylinder made of thermoplastic resin, which has a cylindrical shape with both ends open, and has a filtration net support made of a plurality of filtration net support ribs extending in the longitudinal direction of the cylindrical body protruding from one of the open ends. a filter net fixed to the one open end of the cylinder so as to cover the entire filter net support and one open end on the distal end side of the cylinder; and a tubular body with both ends open. , a blood bubble remover body formed by fitting the cylindrical body to which the filtration net is fixed into one end of the tubular body in a liquid-tight manner with the filtration net supporting rib side facing inward; a first cap that is fluid-tightly fitted to the one open end of the bubble remover body and has a tube connection port; a first cap that is liquid-tightly fitted to the other open end of the bubble remover body; 2nd port with tube connection port
A blood bubble remover characterized by comprising: a cap; and a cap.