JPS62686Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a blood circuit for an artificial kidney or an artificial lung.

The blood circuit takes blood from the patient's veins and
It is generally used to return treated blood to the patient after being supplied into the artificial kidney or organ, and consists of a venous side and an arterial side. The main body mainly consists of a tube made of soft vinyl chloride, and other necessary parts (drip chamber, mixed injection port, heparin line, priming line, etc.) are installed in the middle.

One end on the arterial side and one end on the venous side are configured to be connected to a blood inlet port and an outlet port, respectively, of the artificial organ, and the other end is configured to be connected to a needle (such as an AVF set) or shunt that is inserted into a patient's blood vessel. configured.

However, as shown in Fig. 1, an artificial kidney (dialysis machine) called a hollow-eye bar type has a collar that has an outer diameter slightly larger than the inner diameter of the connection part 2 of the circuit tube on both the inlet and outlet sides of the blood port 1. A funnel-shaped port with a piece 3 is used, whereas the end face 4 of the circuit tube connection 2 is provided in a very simple form, simply cut at right angles to the longitudinal direction of the tube.

However, although the connection can be done by clamping from above, the connection is made by friction between the blood circuit tube and the tip of the blood port, and since the inside diameter of the circuit tube is smaller than the outside diameter of the blood port, the connection is not easy. As a result, there is a high possibility of contamination.

Furthermore, since it is not easy to remove the blood circuit after dialysis, there is a possibility that residual blood may scatter.

Despite these problems, a special connector type was not adopted due to the high cost of the blood circuit. That is,
In the several years since dialyzers having the blood port shown in FIG. 1 have been on the market, the blood circuit dialyzer connections have not been improved as described above.

The present invention has been developed in view of the above circumstances, and its purpose is to improve the dialyzer connection portion of the conventional blood circuit without increasing the cost of the blood circuit. To achieve the object of the present invention, there is provided a blood circuit having a connection part fitted into a blood port of an artificial kidney, etc., wherein the blood circuit has a pump tube in the middle, and the connection part has a substantially circular shape. It has an end face having a cross section and an inner circumference length longer than the inner circumference length in the cross section, and the inner circumference length in the cross section is the outer circumference of the maximum outer diameter part in the middle of the fitted part of the blood port. The soft tube is made of a soft tube, and the inner circumference at the end face is smaller than the outer circumference of the maximum outer diameter part in the middle of the fitted part of the blood port, and the inner circumference is smaller than the outer circumference of the maximum outer diameter part. The connecting portion of the blood circuit having the above-mentioned blood circuit is a blood circuit that is fitted so as to tightly fit over the entire circumference of the maximum outer diameter portion.

The present invention will be described in detail below with reference to the drawings. What is shown in FIG. 2 shows one embodiment of the present invention, and FIGS. 3 and 6 show enlarged views of the dialyzer connection part.

The blood circuit 5 consists of an arterial circuit 6 and a venous circuit 7. The arterial circuit 6 and the venous circuit 7 are commonly used circuits, and their bodies are made of tubes made of soft vinyl chloride, for example. The explanation about the parts installed midway is extremely general and does not seem to require any special explanation, but please describe what kind of parts are installed for typical items. First, the arterial side circuit 6 includes, for example, an adapter 8 for connecting to a suction AVF set, a mixed injection port 9, a priming line 10, a heparin line 11, a negative pressure monitor 12, a blood pump tube 13, and a level adjustment line 14. Air chamber 1 with
5 and dialyzer blood inlet port connection 1
Consists of 6. On the other hand, the venous side circuit 7 includes, in order from the dialyzer blood outlet port connection part 17, the mixed injection port 18, the blood filtration network 19, and the level adjustment line 2.
0 and a pressure monitor line 21, a mixed injection port 23, and a return AVF set 24.

Since the connecting parts 16 and 17 are structurally identical, one of them, the connecting part 16, will be explained here, but please refer to FIG. 3 for easier understanding. According to FIG. 3, the inner circumferential length of the inclined end face 25 is longer than the inner circumferential length in the cross section of the connecting portion. In other words, the connection part has an inclined end face 25 cut obliquely to its longitudinal axis. An appropriate angle of inclination is approximately 45°. As shown in Figure 4 when connected, the flange piece 3 at the tip of the blood port has an inclined end surface 2.
5, and then push it in as shown by the arrow to connect as shown in FIG. When removing it, do the exact opposite of how you connected it.

Since the inner peripheral length of the inclined end surface 25 is naturally larger than that of a conventional one cut at right angles, it can be fitted to the tip of the port extremely easily, and the flange piece 3 at the tip of the port can be fitted very easily. The conventional degree of coupling by friction between the outer diameter of the connecting portion and the inner diameter of the connecting portion is no longer possible.

Further, FIG. 6 shows another embodiment of the present invention, in which the large-diameter end face 27 is provided in a bulge-like portion connected to the connecting portion.

In this case as well, since the inner circumferential length of the end face is longer than the inner circumference in the cross section of the connecting portion, connection is extremely easy as in the previous embodiment.

As detailed above, in the case of the present invention, it is possible to connect the blood circuit to the blood port extremely easily with simple processing of conventional connections, and it is possible to maintain exactly the same degree of connection as before. , which has various advantages such as being able to provide a blood circuit that does not increase costs.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway view showing a conventional blood circuit connection part and blood port, Fig. 2 is an overall view showing an embodiment of the blood circuit according to the present invention, and Fig. 3 is an embodiment of the present invention. FIGS. 4 and 5 are views showing the connection between the blood port and the connecting portion of the embodiment shown in FIG. 3, and FIG. 6 is an enlarged perspective view of another embodiment of the present invention. FIG. 5... Blood circuit, 16, 17... Connection part, 25
... Sloped end surface, 27 ... Large diameter end surface.

Claims (1)

[Claims for Utility Model Registration] (1) In a blood circuit having a connection part fitted into a blood port of an artificial kidney, etc., the blood circuit has a pump tube in the middle, and the connection part is substantially having a circular cross section and an end surface having an inner circumference longer than the inner circumference in the cross section;
The inner circumference length in the cross section is smaller than the outer circumference length of the maximum outer diameter part in the middle of the fitted part of the blood port, and the inner circumference length in the end face is smaller than the maximum outer diameter part in the middle of the fitted part of the blood port. The connection part of the blood circuit is made of a soft tube that is larger than the outer circumference of the part, and has an inner circumference smaller than the outer circumference of the maximum outer diameter part, and is fitted so that the connection part of the blood circuit is in close contact with the entire circumference of the maximum outer diameter part. A blood circuit characterized by: (2) The blood circuit according to item 1 of the scope of the detailed request for registration of a utility model, wherein the end face of the connecting part is an inclined end face that is inclined at an acute angle with respect to the longitudinal direction of the connecting part. (3) The blood circuit according to claim 1, wherein the end face of the connecting portion is a bulging portion connected to the connecting portion.