JPS62181054A - Liquid storage chamber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] I Technical field related.

BACKGROUND ART Conventionally, for example, when performing dish tL dialysis, extracorporeal blood circulation is performed by guiding the patient's blood outside the body, returning it to the patient's body after dialysis, and repeating this process. A blood circuit device with a blood storage chamber that stores a certain amount of blood is used to prevent air bubbles from entering the body, check blood flow, measure pressure, and remove foreign substances from the blood. There is.

However, when the refluxed blood falls onto the blood surface in the blood storage chamber and collides with the liquid surface, the refluxed blood entrains the air near the liquid surface, creating bubbles of various sizes within the blood storage chamber. arise. Among these bubbles, the larger ones rise to the surface of the liquid with their own force, but the smaller ones (remain below the liquid surface, and in some cases leave the blood storage chamber and reach the circulation circuit, where they interact with the blood. There have been cases where blood flows into the body and causes great harm to the human body.Also, conventional blood,
There is an example of using a tube-shaped part for the night introduction part.
This is because the tube is stained red due to the formation of blood flow on the inner surface of the tube, making it difficult to confirm that the blood flow has stopped.

■3 Purpose of the present invention The present invention has been made in view of the above circumstances, and aims to reduce the generation of air bubbles that occur when extracorporeally circulated body fluid falls into the body fluid in the fluid storage chamber in the circulation circuit. It is an object of the present invention to provide a fluid storage chamber which can reduce the amount of fluid, eliminate harm to the human body due to air bubbles entering the body, and further enable confirmation of the stoppage of the flow of body fluids during body fluid circulation.

What achieves the two-legged purpose is a column-shaped fluid storage chamber that stores a certain amount of body fluid, which is equipped with a body fluid inlet at the top and a body fluid outlet at the bottom, and the body fluid inlet is located inside the chamber. The hollow body is opened to the chamber, extends downward from the chamber, and has a free end. The tip and the body fluid level in the chamber should be separated from each other by a distance of +0ttrx or less, which is a fluid storage chamber. Moreover, it is preferable that the diameter of the hollow body is reduced at the tip.

(1) Detailed Description of the Present Invention Hereinafter, a liquid storage chamber of the present invention will be specifically described based on an illustrated embodiment.

FIG. 1 shows the entire blood circuit device when a dialyzer is used, and FIG. 2 is an enlarged view of a venous blood storage chamber that is a part of the blood circuit shown in FIG. In FIG. 1, a blood vessel (not shown) in arm l is connected to a pump 2 via a blood inlet of a tube, and the pump 2 is further connected to a blood storage chamber 3a.
It is connected to the dialyzer 4 via an artery side circuit.

On the other hand, the dialyzer 4 is further connected to a blood storage chamber 3b, and the blood storage chamber 3b is connected to a blood vessel (not shown) in the arm 1 via a blood outlet portion of a tube, thereby forming a venous circuit. The arterial side circuit and the venous side circuit are connected to constitute an extracorporeal circulation blood circuit device.

Further, liquid level adjustment lines 6a, 6b and/or pressure monitor lines 7a, 7b are connected to the upper ends of the blood storage chambers 3a, 3'b, respectively, so as to communicate with the air layers 5a, 5b inside the blood storage chambers. Each cap 8a, 8b is provided with a cap 1f13 at the upper end of the cap 3a, 3b.

Furthermore, a rubber tube 9 for injecting a drug solution and a negative pressure monitor 10 are connected to the middle of the blood circuit device for blood sampling, and a line 11 for injecting heparin is connected to the tube between the arm 1 and the pump 2. It is provided.

In FIG. 2, a vertical groove body I3, which is a hollow body that is electrically connected to the tube 12 and constitutes the blood introduction part, and which forms a part where the inner surface of the hollow body extending to the tip of the blood introduction part is exposed, is connected to the blood storage chamber. It is being The vertical groove body 13 has an inner wall surface 14, and its tip 15 is located above the blood surface 16 stored in a portion of the blood storage channel.

Further, a filter net support 17 is inserted into the blood outlet portion on the lower end side of the blood storage chamber 3b, and the filter net support 17 is sealed together with the filter net 18 surrounding the filter net support 17 at the end of the blood storage chamber. 1. do.

In the above-described configuration, first, a priming operation is performed using a sterilized physiological saline solution, and the physiological saline solution is stored in each blood storage chamber.

Next, the blood discharged from the affected arm l reaches the blood storage chamber 3a on the artery side by the pump 2 installed on the artery side.
Here, a certain amount of 11n[ is stored. Furthermore, the stored blood is purified by the dialyzer 4! t1f (=1 [W fluid enters the venous circuit, and the blood storage channel / (-3bi
Finally, it returns to the body through the blood storage chamber 3b.

In this extracorporeal circulation blood circuit device, when blood enters the blood storage chamber 11i7, it is first introduced into the vertical W4 body 13, and is transmitted downward along the inner wall surface 14 of the vertical groove body 13. It leaves the tip 15 and falls onto the blood surface 16. The blood further passes through a filtering net 18 to remove substances in the blood, and then flows through the circuit again.

That is, in this example, a vertical groove is formed in the blood storage chamber, and the distance from the tip of the vertical groove to the blood surface is shortened, so that the blood flow can be prevented without entraining air bubbles near the liquid surface. , to prevent air bubbles from forming below the liquid surface.

Some conventional blood introduction parts use tube-shaped parts, which cause a column of blood to form on the inner surface of the tube, which stains the tube red, making it difficult to confirm that the blood flow has stopped. Met.

However, since the blood introduction part in this embodiment described above is formed by one vertical corpus luteum, it is possible to
You should be able to see 6 degrees by touching 1 degree.

If the blood stops flowing, immediately cut off (11).
.

Be able to do things.

011 The tip of the vertical type 1 waiting body was placed in the blood storage chamber within a distance of 10 mm from the tip to the blood surface, so that almost no air bubbles were generated during blood circulation. , blood can be stored in the chamber. The inner diameter of the vertical groove body is preferably 2 to 5 x m; if it is less than 2 mm, blood will overflow from the groove body, and if it exceeds 5 x m, there is a high possibility that blood will not be transmitted through the groove during reflux.

The material of the hollow body forming the vertical groove body is polyhinyl chloride,
Polycarbonate, polypropylene, polyethylene, acrylic/butanoene/styrene copolymer, acrylic/
It can be appropriately selected from styrene copolymer polystyrene.

Further, as the material of the filter net, polyester, polyamide, polyethylene, polypropylene, etc. can be used.

As mentioned above, in the above explanation, an extracorporeal circulation circuit device using a dialyzer was described, but the blood storage chamber according to the present invention is not limited to this, but can be used in various extracorporeal circulation circuit devices, etc. It is possible.

9.Specific Effects of the Present Invention As stated above, the liquid storage chamber of the present invention is a column-shaped liquid storage chamber that stores a certain amount of body fluid, which is equipped with a body fluid introduction part on the upper side and a body fluid outlet part on the lower side. In the chamber, the body fluid introduction part is a hollow body that opens into the chamber, extends below the chamber, and has a free end.
The hollow body has a portion that extends to the tip of the hollow body and exposes the inner surface of the hollow body, and further, the tip of the hollow body and the body fluid level in the chamber are separated and the distance is less than toam. Therefore, when the circulating body fluid flows into the body fluid layer in the circulating body fluid circuit device, a hollow body forming a vertical groove body extending downward is provided in the body fluid introduction part in the fluid storage chamber. This makes it possible to prevent the generation of bubbles within the body fluid layer.

Moreover, the blood introduction part is not a conventional tube-shaped one,
By being formed of 1fiT body, the flow of blood can be clearly confirmed with the naked eye, and when the blood stops,
Able to make instant judgments.

Therefore, a situation in which air bubbles enter the patient's body together with the circulating body fluid does not occur, and the patient's life is safely maintained, which is a great effect.

[Brief explanation of drawings]

FIG. 1 is a schematic view of the entire blood circuit bag 1ξ, and FIG. 2 is a perspective view of a liquid storage chamber according to an embodiment of the present invention. 1. Arm, 2. Pump, 3a', 3b. Blood storage chamber, 4. Dialyzer, 5a, 5b. Air layer. Pressure monitor line, 8a, 8b...cap. 9...Rubber tube, 10...Negative pressure monitor, 11...
・Main heparin line, 12・Tube, 13...
・Vertical ijI￥body, 14・Vertical! Inner wall surface of M body, 15.
・Lower tip of vertical groove body, 16...surface liquid level, +7
...filtration net support, 18...filtration net. Agent: Patent attorney Hiroshi Shimizu;, ゛ □;. ``Utagi 2

Claims (2)

[Claims] (1) In a column-shaped fluid storage chamber that stores a certain amount of body fluid and has a body fluid inlet at the top and a body fluid outlet at the bottom, the body fluid inlet opens into the chamber and the body fluid outlet opens at the bottom of the chamber. It is a hollow body that extends and has a free end, the hollow body having an exposed portion of the inner surface of the hollow body extending to the distal end of the hollow body, and further having a contact between the distal end of the hollow body and the body fluid level in the chamber. are separated and the distance is 10m
A liquid storage chamber characterized in that the liquid storage chamber is less than m. (2) The liquid storage chamber according to claim 1, wherein the hollow body has a reduced diameter at a distal end side.