JPH0644435Y2 - Extracorporeal circulation circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of an extracorporeal circulation circuit used for extracorporeal circulation, and in particular, a blood level is provided in the middle of a blood introduction side circuit constituting the extracorporeal circulation circuit. Provided is an extracorporeal circulation circuit in which an inlet side chamber formed so as to foam is arranged, and an outlet side chamber formed so as not to foam the blood level is arranged in the middle of a blood outlet side circuit.

[Problems to be Solved by Prior Art and Invention] With a blood treatment device such as a dialyzer or a filter that is currently used, a foaming type is provided in the middle of the blood introducing side circuit and the blood deriving side circuit that constitute the extracorporeal circulation circuit. Alternatively, either a froth-prevention type drip chamber is arranged.

The bubbling type drip chamber is a type in which a drip of blood directly hits the blood level, and the blood level is bubbling, and it is a type that it can be confirmed that blood is flowing in the appearance. Due to this foaming, there are problems of the function that blood clots are likely to occur in the vicinity of the blood level and the problems of operability such as a decrease in the effectiveness of the dialyzer and air mixing into the blood of the patient due to the flow of foam into the downstream. It was

On the other hand, the bubbling prevention type drip chamber has a blood inlet on the side wall of the chamber, a top side wall to pass through, and an outlet for blood inside the blood in order to prevent the occurrence of the above-mentioned function and operability problems. The structure is such that it is immersed in water, or the blood flows out from the bottom into the stored blood like a fountain, and bubbling at the blood level is low.

When using the extracorporeal circulation circuit, a metal or plastic needle is pierced into the blood vessel of the patient to be treated, and blood is drawn out by the extracorporeal circulation pump.At that time, negative pressure is applied to the blood and it is dissolved in the blood. The generated gas is generated in the negative pressure section of the blood introducing side circuit. Taking a general hemodialysis condition as an example, the blood flow rate between the patient and the circulation pump is 200 to 100.
When set to ml / min, there are differences depending on the thickness of the needle, the inner diameter and length of the tube, the patient's blood pressure, etc.
Negative pressure of 0 mmHg or less occurs, and maximum 2 in 1 hour in the negative pressure section.
There is generation of 0 ml of dissolved gas. For this reason, since the degassed blood flows in the portion downstream from the circulation pump, various problems may occur depending on the shapes of the drip chambers on the blood introduction side and the discharge side which are located downstream.

First, when this chamber is a bubble type, by making the blood level bubble, the contact area between blood and gas is widened, and blood degassed upstream of the circulation pump is insufficient gas at these bubbles. Is taken in, and as a phenomenon, an increase in the blood level in the chamber is observed.

If this phenomenon continues, blood will enter the monitor line and level adjustment line provided at the upper part of the chamber, and the pressure monitoring device will be contaminated, causing a problem. As a coping method, air is infused from a monitor line or a level adjustment line, but if sterile air is not infused, an infectious disease may occur, which is also a problem. Further, there is a problem that blood coagulation remains at the end of extracorporeal circulation due to the blood level bubbling in conjunction with the above-described increase in blood level.

On the other hand, the anti-foaming type flows through the side wall as described above and the inflow port is immersed in blood, so it is not possible to visually check the flow of blood, and it is possible to visually check the blood coagulation that has occurred in the chamber. There was a problem that it would be delayed because it could not be done. Therefore, the present inventor has made intensive studies in order to solve the above problems, and as a result, arrived at the next inventor.

[Means for Solving the Problem] The present invention relates to an extracorporeal circulation circuit 1 used for extracorporeal circulation, which is a blood treatment device 2, a blood introduction side circuit 3 attached to the blood treatment device 2, and blood. The blood introducing side circuit 4 is provided with an inlet side chamber 5 and a circulation pump mounting portion 6 in the middle of the blood introducing side circuit 3, and an outlet side chamber 7 is provided in the middle of the blood leading side circuit 4. The inlet chamber 5 is formed so that the blood introduced into the chamber through the blood inlet directly hits the blood level and causes the blood level to bubble, and the outlet chamber 7 enters the chamber through the blood inlet. The extracorporeal circulation circuit is provided so that the blood to be introduced passes through the inner wall of the chamber or is directly introduced into the blood so that the blood level does not foam.

[Operation] As described above, according to the present invention, the inlet side chamber 5 formed so as to foam the blood level is arranged in the middle of the blood introducing circuit, and the outlet formed so as not to foam the blood level in the middle of the blood drawing circuit. Since the side chamber 7 is arranged,
Due to these synergistic effects, an increase in the blood level in the chamber 5 can be prevented, a blood clot that has been generated in the conventional chamber 5 can be prevented, and the chamber 7 in which the conventional blood level could not be confirmed. You can check the blood flow with.

[Embodiment] FIG. 1 is a schematic view of an extracorporeal circulation circuit 1 of the present invention. The extracorporeal circulation circuit 1 basically includes a blood processing device 2 and the blood processing device 2.
Blood introducing side circuit 3 and blood deriving side circuit 4, which are attached to the
Further, it is composed of a blood removal needle 11 and a blood return needle 12.

An inlet side chamber 5 and a circulation pump mounting portion 6 are arranged in the middle of the blood introduction side circuit 3, and an outlet side chamber 7 is arranged in the middle of the blood discharge side circuit 4.

As an embodiment of the inlet side chamber 5 used in the present invention, a drip chamber 31, as shown in FIGS. 2 and 3,
There is 41.

The drip chamber 31 has a blood inlet 3 at the top of the body 32.
3, blood outlet 34 is formed at the bottom, filter 3 at the bottom
5 are arranged. The blood introduced from the blood inlet 33 into the main body 32 directly hits the blood level 36 to reach the blood level.
36 is formed to foam.

The drip chamber 41 is formed such that the opening of the blood inflow port 43 is formed obliquely so that the blood level 46 hits the blood level more vigorously so that the blood level 46 easily bubbles.

As an embodiment of the outlet side chamber 7 used in the present invention, a drip chamber 51 as shown in FIGS. 4 and 8,
There are 61, 71, 81, 91.

The drip chamber 51 has a blood inlet at the upper side of the main body 52.
53, a blood outlet 54 is formed at the bottom and a filter at the bottom
55 are arranged. The blood introduced from the blood inlet 53 into the main body 52 is gently introduced to the blood level 55 along the inner wall surface of the main body inscribed in the blood inlet 53, so that the foaming of the blood level 56 can be prevented. .

However, if the inner diameter of the blood inlet 53 is reduced and the flow velocity of the blood inlet 53 is increased, the blood introduced from the blood inlet 53 into the main body 52 collides intermittently with the inner wall surface of the opposite main body. Foams. In this way, it can be used in the embodiment of the inlet chamber 5.

The drip chamber 61 is provided with a blood inlet 63 at the upper end of the main body 62, and the blood introduced from the blood inlet 63 into the main body 62 gently flows through the inner wall surface of the upper portion of the main body to a blood level 66.
It is possible to prevent the foaming of the blood level 66 because it is introduced into.

The drip chamber 71 is provided with a blood inlet 73 at the upper end of the main body 72, and the inner wall surface of the upper portion of the main body 72 is formed into a curved surface. Since it is gently introduced into the blood, it is possible to prevent the foaming of the blood level 76.

The drip chamber 81 has a blood inlet 83 provided at the upper portion of the main body 82 and extends to the middle abdomen of the main body 82, and the blood introduced from the blood inlet 83 does not directly hit the blood level 86 inside the chamber 81. Since it is introduced into the blood stored in
No bubbling occurs at blood level 86.

The drip chamber 91 is provided with a blood inlet 93 at the bottom of the main body 92 and extends to the middle abdomen of the main body 92, and is directly introduced from the blood inlet 93 into the blood stored in the chamber 91. No frothing at level 96.

As described above, the present invention has the inlet side chamber 5 formed so as to bubble the blood level in the middle of the blood introduction circuit, and the outlet side chamber 7 formed so as not to cause the blood level in the middle of the blood discharge circuit. Since I placed
The following synergistic effects are obtained.

In the chamber 5, the blood-dissolved gas generated between the patient and the extracorporeal circulation pump can be dissolved in the inlet side chamber 5, and the blood level rises.

However, the gas generated in the negative pressure section rides on the flow by the circulation pump, passes through the circulation pump, and reaches the inside of the inlet side chamber 5, so that the blood level is lowered. This increase and decrease are offset, and no increase in the liquid level is visually observed, and the appearance of blood flow can be visually confirmed.

Since the dissolved gas generated in the negative pressure section is dissolved again in the inlet side chamber immediately downstream, the other outlet side chamber 7 downstream thereof has a reduced dissolved amount and is provided with a bubbling prevention type. Therefore, the outlet chamber 7
The blood level within it will rise less.

[Advantage of Device] As described above, since the insufficient gas can be dissolved in the inlet side chamber 5 and the blood flow rate can be confirmed, and bubbling can be prevented in the other outlet side chamber.
It is possible to solve functional problems and operability problems.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an extracorporeal circulation circuit of the present invention, FIGS. 2 and 3 are schematic diagrams showing an embodiment of an inlet side chamber, and FIGS. 4 to 8 are schematic diagrams of an outlet side chamber. In the figure, 1 is an extracorporeal circulation circuit, 2 is a blood processing device, 3 is a blood introducing circuit, 4 is a blood drawing circuit, 5 is an inlet side chamber, 6
Is a circulation pump mounting portion, 7 is an outlet side chamber, 9 is an area of negative pressure, 10 is a patient, 11 is a blood removal needle, and 12 is a blood return needle.

Claims (1)

[Scope of utility model registration request] 1. An extracorporeal circulation circuit 1 used for extracorporeal circulation.
In addition, the blood treatment device 2 and a blood introduction side circuit 3 and a blood derivation side circuit 4 mounted on the blood treatment device 2 are provided, and an inlet side chamber 5 and a circulation are provided in the middle of the blood introduction side circuit 3. A pump mounting portion 6 is arranged, an outlet side chamber 7 is arranged in the middle of the blood outlet side circuit 4, and the inlet side chamber 5 is directly introduced into the chamber through a blood inlet to directly hit the blood level. The outlet side chamber 7 is formed so that the blood level is bubbled, and the blood introduced into the chamber via the blood inlet is introduced into the chamber wall directly or directly into the blood. An extracorporeal circulation circuit characterized by being formed so as not to stand.