JPH09210992A - Stop barrier for blood sedimentation tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stop barrier for a blood sedimentation tube. SOLUTION: A hollow tubing 2 having a constant inside diameter is formed from a clear material where the two ends are left open, and a water-repellent stop barrier 5 admitting passage of gas and not admitting liquid is inserted fast in the hollow tubing 2 so that a blood sedimentation tube 1 is achieved. The bottom 3 of the hollow tubing 2 is immersed in a sampled liquid, and suction is made from the top 4 to cause the liquid in the hollow tubing 2 to elevate to the bottom surface of the stop barrier 5, and thereafter no more elevation of liquid level will be made.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to blood sedimentation tubes.
Specifically, it relates to a stop barrier used for a blood tube.

[0002]

2. Description of the Related Art Conventionally known blood-settling tubes are hollow tubes calibrated along the longitudinal direction and open at both ends. ) Is filled with blood mixed with the required amount of sodium citrate, and the blood is prevented from leaking, and then the blood sedimentation is measured by standing vertically. that time,
A method of filling a blood sample to be tested in a predetermined amount into a blood sampling tube is to insert one end of the blood sampling tube into a vacuum blood collection tube containing blood mixed with a required amount of sodium citrate, and suck the other end with the mouth. There is a method of sucking blood to the zero scale position. Also, instead of sucking with the mouth, insert a slender piston-shaped rod into the blood tube, and pull up the piston-shaped rod to suck up the required amount of blood, or a container into which the injection needle can be inserted from the side. There is a method in which a sealed drop is attached to the container, a required amount of blood to be examined is injected into the container by using a syringe, and the blood is filled in the blood tube.

Therefore, recently, a blood tube as disclosed in Japanese Patent Publication No. 7-9424 has been developed. This blood sedimentation tube is a water-repellent synthetic material that is permeable to air but impermeable to liquid, at a predetermined position in the longitudinal direction of the hollow blood sedimentation tube body with both ends open. A blood stop clot made of resin is integrally inserted, and a blood stop clot that is integrally inserted at a predetermined position in the longitudinal direction inside the hollow blood sedimentation tube body is fitted into the hollow blood sedimentation tube body. It is a plastic mold filled with synthetic resin made from water.

[0004]

SUMMARY OF THE INVENTION Recently developed blood tube (Japanese Patent Publication No. 7-9424, Japanese Utility Model Publication 62-81).
No. 056) has been improved so as to obtain a blood-concentrating tube superior to the conventional one, but there is a problem to be solved by the present invention.

[0005]

DISCLOSURE OF THE INVENTION The present invention was developed in order to solve the above-mentioned problems, and is provided with a transparent hollow tubular body having open both ends and having a constant inner diameter. A blood sedimentation tube, which is formed by inserting a stop barrier having water repellency that allows gas to pass through the body but does not allow liquid to pass through, wherein the lower end of the hollow tubular body is immersed in the sampled liquid and sucked from the upper end. In the provision of a stop barrier for a haemolysis tube characterized in that the liquid in the hollow tube rises to the bottom surface of the stop barrier, the liquid level does not rise further, and gas passes through the stop barrier. It is made of a porous synthetic resin body having a property of imperviousness to liquids, and the porous synthetic resin body is polyethylene, polypropylene, ethylene, vinyl acetate copolymer, polyethylene, acrylonite. Super-absorbent polymer (xerogel) is adhered to the porous body obtained by semi-melt molding of thermoplastic resin powders such as copolymers, and the super-absorbent polymer is gelatin, Another object of the present invention is to provide a stop barrier for a blood sedimentation tube, which is made of a polymer compound having a water absorbing ability and a sealing ability such as agar and gum arabic.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention provides a stop barrier having a transparent hollow tube of which both ends are open and having a constant inner diameter, through which a gas passes but a liquid does not pass. The present invention relates to an improvement of a blood tube containing a blood vessel.

Further, when the lower end of the hollow tube is immersed in the sampled liquid and suctioned from the upper end so that the liquid in the hollow tube rises to the bottom surface of the stop barrier, the liquid level does not rise further. ing.

Further, the stop barrier is made of a porous synthetic resin body having a property of allowing gas to pass therethrough but not allowing liquid to pass therethrough. In addition, the porous synthetic resin body is a polyethylene, polypropylene, ethylene, vinyl acetate copolymer, polyethylene, in the porous body obtained by semi-melt molding the powder particles of a thermoplastic resin such as acrylonitol copolymer Super absorbent polymer (xerogel) is made to adhere.

Further, the superabsorbent polymer is composed of a polymer compound having a water absorbing ability and a sealing ability such as gelatin, agar and gum arabic. That is, according to the blood sedimentation tube according to the configuration of the present invention, a synthetic synthetic resin tube is inserted with a porous synthetic resin body having a characteristic of allowing gas to pass from a tapered opening to a predetermined position in the synthetic resin tube but not allowing liquid to pass therethrough. Therefore, it is possible to easily insert the porous synthetic resin body in a predetermined position, and if liquid such as blood is sucked from the tapered opening side to one end surface of the porous synthetic resin body inserted in the predetermined position. Immediate inflow and no further inflow due to the porous synthetic resin body. Then, after this, the sedimentation state of the erythrocytes can be measured every predetermined time by making the blood sedimentation tube vertical.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a blood tube according to the present invention, and 1 is the blood tube. The blood tube 1 is made of polyethylene, for example.
It is made of a synthetic resin tube 2 such as polystyrene or polypropylene. The synthetic resin pipe 2 has a uniform inner diameter and is open at both ends. One end of the synthetic resin tube 2 serves as a liquid inlet 3 into which a liquid such as blood flows. The other end of the synthetic resin pipe 2 is formed in a tapered shape, and the tapered opening 4 is provided so that the porous synthetic resin body 5 can be easily inserted into a predetermined position in the synthetic resin pipe 2. In addition,
The porous synthetic resin body 5 has the property of passing pores but not liquid.

The porous synthetic resin body 5 is a porous material obtained by semi-melt molding a powder or granular material of a thermoplastic resin such as polyethylene, polypropylene, ethylene, vinyl acetate copolymer, polystyrene and acrylonitol copolymer. It is obtained by bringing a super absorbent polymer (xerogel) into close contact with the body. The term "half-melt molding" as used herein means that the powder of the thermoplastic resin as described above is filled in a mold of a constant shape and the filling layer is pressed for the purpose of adjusting the porosity, and further the powder-filled layer is formed. When the particles were uniformly heated and cooled when the contact surfaces of the particles were fused in a semi-molten state, the interparticle voids were completely continuous 3
It refers to a molding method that forms a dimensional space (pores), and superabsorbent polymer refers to a polymer compound that has a water-absorbing ability and sealing ability such as gelatin, agar, and gum arabic, and further xerogel. Means that the super absorbent polymer is in a dry state.

Therefore, since the porous synthetic resin body 5 is a porous body obtained by semi-melt molding a thermoplastic resin powder, a xerogel-state superabsorbent polymer is adhered to the porous body. When a liquid such as blood passes through the porous synthetic resin body 5 although a gas such as air is passed through, the superabsorbent polymer in the xerogel state instantly absorbs the liquid and swells the xerogel-like superabsorbent polymer. It becomes impermeable to liquids. The porous synthetic resin body 5 has one end surface 5a graduated from the liquid inflow port 3 side in increments of 1 mm, and inserted into the synthetic resin tube 2 so that the 20 cm position is located at the 0 point (base point). There is.

Next, a method of using the blood tube having the above construction will be described. First, the blood sedimentation tube 1 of the present invention is prepared, and the liquid inlet 3 of the blood sedimentation tube 1 is put into a test tube or the like containing blood that has been prevented from coagulation by sodium citrate. Next, when the pressure inside the synthetic resin tube 2 is reduced from the tapered opening 4 side by a pump or the like, blood enters the synthetic resin tube 2 through the blood inlet 3 and this blood is at 0 point on the scale, that is, one of the porous synthetic resin bodies 5. When the end surface 5a is reached, the xerogel-state superabsorbent polymer in close contact with the porous synthetic resin body 5 instantly absorbs water in the blood, swells, and becomes a sealed state so that the blood stops at 0 point. Is configured. Therefore, the operation of inserting the blood to the zero point in the blood tube 1 can be performed easily and instantly.
After that, the blood sedimentation tube 1 may be made vertical and the sedimentation state of the red blood cells may be measured at predetermined time intervals, and after the measurement, the used blood sedimentation tube 1 is discarded.

Although the stop barrier having the above-mentioned structure is used in this embodiment, any material other than this can be used as long as the same effect can be obtained. For example, a core is provided in a non-porous outer case and a porous inner part like a barrier plug that has been conventionally used, and the non-porous part and the inner wall of the tube are made airtight by this core. It is also possible to use a method in which neither the air nor the liquid passes through the non-porous portion and only the porous portion allows the air but the liquid does not pass through.

[0015]

According to the present invention, a transparent hollow tubular body having open both ends and a constant inner diameter is provided, and a stop barrier having a water repellent property that allows gas to pass through but does not allow liquid to pass through is inserted into the hollow tubular body. When the liquid in the hollow tube rises to the bottom of the stop barrier by immersing the lower end of the hollow tube in the sampled liquid and sucking it from the upper end, the liquid level rises further. The porous synthetic resin body is made of polyethylene, polypropylene, ethylene, or vinyl acetate, and is made of polyethylene, polypropylene, ethylene, or vinyl acetate. Super-absorbent polymer (xerogel) is adhered to the porous body obtained by semi-melt molding of thermoplastic resin powders such as polymers, polyethylene, and acrylonitrile copolymers. Serial superabsorbent polymer gelatin, agar, so has a structure comprising a polymer compound having a water absorption capacity and sealing property such as gum arabic, have many advantages, such as:. (1) Since it can be made of an inexpensive synthetic resin and the porous synthetic resin body is inserted in a predetermined position from the tapered opening, the production is simple and easy, and the blood tube can be inexpensively produced. B. As a result, it becomes disposable, eliminating the conventional work of washing, sterilizing, drying, etc. for recycling, and data obtained by fat and protein attached to the wall surface due to incomplete washing. There is no loss of reliability. C. Further, there is almost no risk of infection with diseases such as viral hepatitis and AIDS derived from blood, and if liquid is sucked from the tapered opening side, liquid such as blood will be stored in the predetermined position of the porous synthetic resin body. Since it immediately flows into one end and does not flow any further, it is easy to operate, the working time is short, and the labor cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing a blood tube according to the present invention.

[Explanation of reference numerals] 1 blood sedimentation tube 2 synthetic resin tube 3 liquid inlet 4 tapered opening 5 porous synthetic resin body 5a one end surface

Claims (4)

[Claims] 1. A transparent hollow tube having both ends open and having a constant inner diameter is provided, and a stop barrier having a water repellent property that allows gas to pass through but does not allow liquid to pass through is inserted into the hollow tube body. A blood sedimentation tube, in which the lower end of the hollow tube is immersed in the sampled liquid and sucked from the upper end to prevent the liquid level in the hollow tube from further rising when the liquid rises to the bottom surface of the stop barrier. Stop barrier for haemoglobin tube characterized by being 2. The stop barrier for a blood sedimentation tube according to claim 1, wherein the stop barrier is made of a porous synthetic resin body having a property of allowing a gas to pass therethrough but not allowing a liquid to pass therethrough. 3. The porous synthetic resin body is obtained by semi-melt molding a powder or granular material of a thermoplastic resin such as polyethylene, polypropylene, ethylene, vinyl acetate copolymer, polyethylene, and acrylonitol copolymer. The stop barrier for a blood sedimentation tube according to claim 1 or 2, wherein a super absorbent polymer (xerogel) is adhered to the inside of the porous body. 4. The stop barrier for a blood sedimentation tube according to claim 1, 2 or 3, wherein the superabsorbent polymer comprises a polymer compound having a water absorbing ability and a sealing ability such as gelatin, agar, gum arabic or the like.