JPS632627B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a fluid storage chamber and an extracorporeal circulation body fluid circuit device equipped with the same.

BACKGROUND ART Conventionally, for example, when performing hemodialysis, 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. To prevent air bubbles from entering the body, check blood flow, measure pressure, and
BACKGROUND ART Blood circuit devices are used that have a blood storage chamber that stores a certain amount of blood for the purpose of removing foreign substances from the blood.

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. do. Among these bubbles, large ones rise to the surface of the liquid due to their own buoyancy, but small ones remain below the liquid surface and, in some cases, exit the blood storage chamber and reach the circulation circuit, where they flow together with the blood. It could enter the body and cause serious harm to the human body. In addition, there are examples of conventional blood introduction parts using tube-shaped parts, which are dyed red by forming a blood column on the inner surface of the tube, which confirms that the blood flow has stopped. was difficult.

Purpose of the Invention The present invention has been made in view of the above-mentioned circumstances, and is intended to prevent 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 liquid storage chamber that eliminates harm to the human body due to air bubbles entering the body and also allows confirmation of the stoppage of the flow of body fluid during body fluid circulation, and an extracorporeal circulation body fluid circuit device equipped with the same.

The above object is achieved in a columnar liquid storage chamber that stores a certain amount of body fluid and has a body fluid introduction part on the upper side and a body fluid outlet part on the lower side, and the body fluid introduction part opens into the chamber, A hollow body extending below the chamber and having a free end, the hollow body having an exposed portion of the inner surface of the hollow body extending to the tip of the hollow body; A fluid storage chamber that is located below the level of body fluid within the body. Moreover, it is preferable that the diameter of the hollow body is reduced on the tip side.
In addition, what achieves the above purpose includes a tube having a body fluid inlet at one end and a body fluid outlet at the other end, and a tube provided in the middle of the tube, with a body fluid inlet at the top and a body fluid outlet at the bottom. A columnar fluid storage chamber that stores a certain amount of body fluid,
The body fluid introduction part is a hollow body that opens into the chamber, extends downward from the chamber, and has a free end. an extracorporeal circulation system, the tip of the hollow body further comprising a liquid storage chamber located below the body fluid level in the chamber, and a pressure monitor line provided at the upper end of the chamber and communicating with the inside of the chamber. It is a body fluid circuit device.

In addition, what achieves the above purpose includes a tube having a body fluid inlet at one end and a body fluid outlet at the other end, and a tube provided in the middle of the tube, with a body fluid inlet at the top and a body fluid outlet at the bottom. A columnar fluid storage chamber that stores a certain amount of body fluid,
The body fluid introduction part is a hollow body that opens into the chamber, extends downward from the chamber, and has a free end. Further, the tip of the hollow body has a liquid storage chamber located below the body fluid level in the chamber, and a liquid level adjustment line provided at the upper end of the chamber and communicating with the inside of the chamber. It is a circulating body fluid circuit device.

DETAILED DESCRIPTION OF THE INVENTION The present invention will be specifically described below based on an example in which the liquid storage chamber of the present invention is applied to an extracorporeal circulation circuit device.

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. 1st
In the figure, a blood vessel (not shown) in an arm 1 is connected to a pump 2 through a blood introduction part of a tube, and the pump 2 is further connected to a dialyzer 4 through a blood storage chamber 3a, forming an arterial circuit. are doing.

On the other hand, the dialyzer 4 further includes a blood storage chamber 3.
b, and the blood storage chamber 3b is connected to a blood vessel (not shown) in the arm 1 via a blood outlet portion of the tube, 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, 3b so as to communicate with the air layers 5a, 5b in the blood storage chambers, respectively. Each cap 8a, 8b is fitted onto the upper end of the cap.

Furthermore, a rubber tube 9 for blood collection or drug injection and a negative pressure monitor 10 are connected in the middle of the blood circuit device, and a heparin injection line 11 is provided in the tube between the arm 1 and the pump 2. ing.

In FIG. 2, a vertical groove body 13, which is a hollow body that is electrically connected to the tube 12 and constitutes a 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 provided on a cap 8a fitted on the upper end surface. The vertical groove body 13 has an inner wall surface 14, and its tip 15 is located below the blood surface 16 stored in the blood storage chamber. Further, a filtering net support 17 is inserted into the blood outlet portion on the lower end side of the blood storage chamber 3b, and together with a filtering net 18 surrounding the filtering net support 17, the distal end of the blood storage chamber is sealed. There is.

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 patient's arm 1 is delivered to a blood storage chamber 3a on the artery side by a pump 2 installed on the artery side, where a certain amount of blood is stored. Furthermore, the blood that exits the blood storage chamber 3a is purified by the dialyzer 4, and the purified blood enters the venous circuit and reaches the blood storage chamber 3b, which stores a certain amount of blood again.
Finally, it returns to the body through.

In this extracorporeal circulation blood circuit device, when blood enters the blood storage chamber, it is first introduced into the vertical groove body 13, and flows downward along the inner wall surface 14 of the vertical groove body 13 into the blood surface. The blood further passes through a filtering net 18 to remove foreign substances from the blood.
flows through the circuit again.

That is, in this example, a vertical groove body is formed in the blood storage chamber, and the tip of the vertical groove body is positioned below the blood surface of the blood storage chamber, so that air bubbles near the liquid level are trapped. This allows the liquid to flow smoothly and prevent 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 blood flow has stopped. It was hot.

Since the blood introduction section in this embodiment described above is formed of a vertical groove, the flow of blood can be directly confirmed visually.

Also, when the blood stops flowing, it can be immediately determined.

Furthermore, in this embodiment, by positioning the tip of the hollow body forming the vertical groove body below the blood surface in the chamber, blood flows directly into the blood surface while traveling along the inner wall of the groove body. Since the blood does not fall through the air layer, no air bubbles are generated in the blood layer.

Moreover, because the blood introduction part is formed of a grooved body instead of the conventional tube-like shape, the flow of blood can be clearly confirmed visually, and when the blood has stopped, it can be immediately determined. Can be done.

The inner diameter of the vertical groove body is preferably 2 to 5 mm; if it is less than 2 mm, blood will overflow from the groove body, and the inner diameter of the groove body will be 5 mm.
If it exceeds , there is a high possibility that the flow will not be transmitted through the groove during circulation.

The material of the hollow body forming the vertical groove body can be appropriately selected from polyvinyl chloride, polycarbonate, polypropylene, polyethylene, acrylic-butadiene-styrene copolymer, and acrylic-styrene copolymer polystyrene.

In addition, the material of the filter net is polyester,
Polyamide, polyethylene, polypropylene, etc. may be used.

As mentioned above, in the above explanation, an extracorporeal circulation circuit device using a dialyzer has been described, but the blood storage chamber according to the present invention and an extracorporeal circulation circuit device equipped with the same are not limited to this.
It can be used in various circuit devices for extracorporeal circulation.

Specific effects of the present invention As described above, the liquid storage chamber of the present invention is a columnar liquid storage chamber that stores a certain amount of body fluid and has a body fluid introduction part on the upper side and a body fluid introduction part on the lower side. The introduction part is a hollow body that opens into the chamber, extends below the chamber, and has a free end at its tip, and the hollow body has a portion where the inner surface of the hollow body extends to the tip of the hollow body and is exposed. ,
Furthermore, since the tip of the hollow body is located below the level of the body fluid in the chamber, the body fluid that has been circulated is a certain amount of body fluid stored in the fluid storage chamber installed in the circulating body fluid circuit device. By providing a hollow body that forms a downwardly extending vertical groove in the body fluid introduction part in the fluid storage chamber when flowing into the body fluid layer, it is possible to reliably prevent the generation of air bubbles in the body fluid layer. can.

Furthermore, by positioning the tip of the hollow body forming the vertical groove body below the blood surface within the chamber, blood flows directly into the blood surface while traveling along the inner wall of the groove body, and falls through the air layer. Because there is no such thing,
There are no bubbles in the blood layer.

Moreover, because the blood introduction part is formed of a grooved body instead of the conventional tube-like shape, the flow of blood can be clearly confirmed visually, and when the blood has stopped, it can be immediately determined. Can be done.

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 the drawing]

FIG. 1 is a schematic diagram of the entire blood circuit device, and FIG. 2 is a partially cutaway 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, 6a,
6b...Liquid level adjustment line, 7a, 7b...Pressure monitor line, 8a, 8b...Cap, 9...Rubber pipe,
DESCRIPTION OF SYMBOLS 10... Negative pressure monitor, 11... Heparin injection line, 12... Tube, 13... Vertical groove body, 14... Inner wall surface of vertical groove body, 15... Lower tip of vertical groove body, 1
6... Blood surface, 17... Filter net support, 18... Filter net.

Claims (1)

[Scope of Claims] 1. In a columnar liquid storage chamber that stores a certain amount of body fluid and has a body fluid introduction part on the upper side and a body fluid outlet part on the lower side, the body fluid introduction part opens into the chamber and the body fluid introduction part opens into the chamber. A hollow body extending below the chamber and having a free end, the hollow body having:
A liquid storage chamber characterized in that the inner surface of the hollow body extending to the tip of the hollow body has an exposed portion, and further, the tip of the hollow body is located below the body fluid level within the chamber. 2. The liquid storage chamber according to claim 1, wherein the hollow body has a diameter reduced at a distal end side. 3 A tube with a body fluid inlet at one end and a body fluid outlet at the other end, and a tube provided in the middle of the tube, with the body fluid inlet at the top and the body fluid outlet at the bottom, for dispensing a certain amount of body fluid. A columnar liquid storage chamber for storing fluid, the body fluid introduction part being a hollow body that opens into the chamber, extends below the chamber, and has a free end, and the hollow body has the following features:
The inner surface of the hollow body has an exposed portion extending to the tip of the hollow body, and the tip of the hollow body further includes a liquid storage chamber located below the body fluid level in the chamber, and the chamber provided at the upper end of the chamber. An extracorporeal circulation body fluid circuit device characterized by comprising a pressure monitor line that communicates with the inside of the body. 4. The extracorporeal circulation body fluid circuit device according to claim 3, wherein the hollow body of the chamber has a reduced diameter on the distal end side. 5 A tube equipped with a body fluid inlet at one end and a body fluid outlet at the other end, and a tube provided in the middle of the tube, with the body fluid inlet at the upper part and the body fluid outlet at the lower part, for receiving a certain amount of body fluid. A columnar liquid storage chamber for storing fluid, the body fluid introduction part being a hollow body that opens into the chamber, extends below the chamber, and has a free end, and the hollow body has the following features:
The inner surface of the hollow body has an exposed portion extending to the tip of the hollow body, and the tip of the hollow body further includes a liquid storage chamber located below the body fluid level in the chamber, and the chamber provided at the upper end of the chamber. An extracorporeal circulation body fluid circuit device characterized by comprising a fluid level adjustment line that communicates with the inside of the body. 6. The extracorporeal circulation body fluid circuit device according to claim 5, wherein the hollow body of the chamber has a reduced diameter on the distal end side.