JPH0528312U - Blood collection tube - Google Patents

Abstract

(57) [Summary] [Purpose] The main object of the present invention is to store and hold a blood coagulation promoting material at a predetermined position in the blood collecting tube by a very simple operation of simply throwing the blood coagulation promoting material into the blood collecting tube. I have done so. [Structure] The blood collection tube of the present invention has a bottom end portion of the tubular body,
A tapered portion having a diameter gradually decreasing toward the tip is formed, and the outer diameter of the blood coagulation promoting material is smaller than the inner diameter of the tubular body excluding the tapered portion, and any portion of the tapered portion. The main feature is that the diameter is larger than the inner diameter.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a blood collection tube for promoting blood coagulation prior to separating blood collected into a blood component and a serum component by a centrifugal separation action, and in particular, a blood coagulation promoting material is contained inside a tubular body. Regarding the blood collection tube configured.

[0002]

[Prior Art]

 The tube shape of a blood collection tube for accommodating this type of conventional blood coagulation promoting material is described in, for example, JP-B-57-48219, JP-B-58-21939, and JP-B-59-37129, respectively. As disclosed, the inner diameter from the opening of the head to the bottom of the tip is formed to be the same or substantially the same, and the tip of the tubular body is the same or substantially the same as the above-mentioned inner diameter. A semicircular bottom wall was formed.

[0003]

[Problems to be solved by the device]

 To accommodate a blood coagulation promoting material having a circular outer shape at a desired position in a blood collection tube composed of the above-mentioned tubular body, the outer diameter of the blood coagulation promoting material should be slightly larger than the inner diameter of the tubular body. It is essential to form it. That is, in order to accommodate and hold the blood coagulation promoting material at a desired position in the blood collection tube, the outer diameter of the blood coagulation promoting material is formed to be slightly larger than the inner diameter of the blood collection tube. However, the work of pushing the blood coagulation promoting material into the blood collection tube is required, which is not only troublesome, but also the position correction of the blood coagulation promoting material thus pushed in the pushing direction is easy. Position correction in the reverse direction is extremely inefficient in addition to the problem that it cannot be achieved without using a knob such as tweezers. There was an inconvenience.

Therefore, in the blood collection tube of the present invention, in order to solve the inconveniences of the above-mentioned conventional examples, a blood coagulation accelerating material is provided in the tube body without using the above-mentioned elongated rod. The blood coagulation accelerating material can be stored very easily in a fixed position, and the blood coagulation promoting material can be stably stored at a position slightly apart from the bottom surface of the tube body without being located at the bottom surface of the tube body.

[0005]

[Means for Solving Problems]

 In the blood collection tube of the present invention, a tapered portion having a diameter gradually decreasing toward the tip is formed at the bottom end of the tube body, and the blood coagulation promoting material is accommodated and held in the tapered portion. The main feature. Further, in the blood collection tube of the present invention, the outer diameter of the blood coagulation promoting material is set to be smaller than the inner diameter of the tubular body excluding the tapered portion and larger than the inner diameter of any portion of the tapered portion. The main feature.

[0006]

[Action]

 The blood collection tube of the present invention has a bottomed tip portion with a tapered upper portion that gradually decreases in diameter toward the tip, and the outer diameter of the blood coagulation promoting material is the inner diameter of the tubular body excluding the tapered portion. An opening formed in the head of the blood collection tube by pinching the blood coagulation promoting material with a fingertip or tweezers by forming it with a smaller diameter and larger than the inner diameter of any part of the tapered portion. The blood coagulation promoting material is dropped into the tapered body part due to its own weight by an extremely simple work of simply throwing it into the blood collection tube, and in the process, the outer diameter of the blood coagulation promoting material is increased. It is retained by the inner diameter of the taper with a slightly larger diameter. As is clear from this, the holding and holding position inside the tapered portion of the blood coagulation promoting material depends on the correlation between the inclination angle of the tapered portion and the outer diameter of the blood coagulation promoting material. Can be set arbitrarily. Therefore, it is possible to selectively use the blood collection amount for children and the adult amount when it is necessary to collect blood by adjusting the amount of blood collected by the adult. Further, the present invention is characterized in that when the blood in a blood collection tube is separated into a lower-layer blood component having a higher specific gravity and a lower-specificity serum component being separated into an upper layer by a centrifugal action, the above-mentioned blood coagulation accelerating agent Is forced to be pushed toward the tip of the tapered portion, and as a result, there is no fear that the blood coagulation promoting material will be present in the serum component layer, and therefore the blood component and the serum component will be completely removed. Can be separated.

[0007]

EXAMPLE FIG. 1 is a longitudinal side view of an embodiment of a blood collection tube of the present invention in which a blood coagulation promoting material is housed and a cap is attached, and FIG. 2 is an enlarged perspective view of an embodiment of the blood coagulation promoting material. 3 is a longitudinal side view of the blood collection tube of the present invention after centrifugal separation. In the figure, 1 shows the whole blood collection tube, 2 is a bottomed tubular body, and an opening 5 for inserting blood, a blood coagulation promoting material 3, a barrier 4 etc. is formed in the head of this bottomed tubular body 2. The bottomed tip portion of the bottomed tubular body 2 is formed with a tapered portion 6 having a diameter gradually decreasing toward the front end. Reference numeral 7 is a cap for opening the opening 5.

The outer shape of the blood coagulation promoting material 3 is formed, for example, as a thin plate in which a fibrous material is punched out in a circular shape, and the outer diameter thereof is slightly larger than the predetermined inner diameter of the tapered portion 6. Is made.

When the cap 7 of the blood collection tube 1 configured as described above is removed from the opening 5 and the barrier 4 is inserted into the bottomed tubular body 2, next, the blood coagulation promoting material 3 is placed on the fingertip or Pinch with a knob like tweezers and throw it in. The blood coagulation accelerating material 3 thrown into the tube falls under its own weight toward the tapered portion 6 and is held in the tapered portion 6 by the inner diameter portion smaller than the outer diameter of the blood coagulation accelerating material 3. It Therefore, even when the barrier 4 is thrown into the bottomed tube, it is stopped at a position where it does not come into contact with the barrier 4 thrown into the bottom. Then, the collected blood is added. Then, this blood permeates the blood coagulation promoting material 3 already contained in the blood, and the blood is coagulated within a short time. After that, the blood in the blood collection tube 1 is forcibly separated by the centrifugal action so that the blood component 8 having a high specific gravity exists in the lower layer side and the serum component 9 having a low specific gravity exists in the upper layer side. .. During this separation action, the blood coagulation promoting material 3 is forcibly pushed into the tip side of the tapered portion 6 by its centrifugal force, so that the blood coagulation promoting material 3 is mixed into the layer of the serum component 9. There is no such thing. That is, pure serum component 9 can be obtained.

In the present invention, the inside of the tapered portion 6 of the blood coagulation promoting material 3 is determined by the correlation between the inclination angle of the tapered portion 6 and the outer diameter of the blood coagulation promoting material 3. It is possible to select the housing and carrying position in the desired position. Therefore, even if a small amount of blood is collected, it will be immersed in blood. With this, for example, it is possible to selectively use for children and for adults.

[0011]

[Effect of the device]

 In the blood collection tube of the present invention, a tapered portion having a diameter gradually decreasing toward the tip is formed at the bottomed tip portion, and the outer diameter of the blood coagulation accelerating material is set within the tubular body excluding the tapered portion. Since the diameter is smaller than the diameter and larger than the inner diameter of any part of the tapered portion, the blood coagulation accelerating material is pinched with fingertips or tweezers, and simply thrown into the tube through the opening. With this extremely simple operation, the blood coagulation promoting material is dropped by its own weight toward the tapered portion in the tubular body, and in the course of this drop, a taper slightly smaller than the outer diameter of the blood coagulation promoting material is used. When the barrier is accommodated in the bottomed tubular body, the blood coagulation-promoting material is retained above the barrier without touching the barrier and promotes blood coagulation promotion. It is extremely easy and efficient to store the material in the pipe Can Nau. Further, according to the present invention, when blood in the blood collection tube is separated into a lower-layer blood component having a higher specific gravity and a lower-specificity serum component being separated into an upper layer by the centrifugal action, the blood coagulation is promoted. Since the material is forcibly pushed into the tip side of the tapered portion by the centrifugal force, the blood coagulation promoting material does not exist in the serum component layer, and thus a pure serum component can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a blood collection tube of the present invention in which a blood coagulation promoting material is contained and carried and a cap is attached.

FIG. 2 is an enlarged perspective view of the blood coagulation promoting material of the present invention.

FIG. 3 is a vertical sectional side view of the blood collection tube of the present invention after centrifugation.

[Explanation of symbols]

 1 Blood collection tube 2 Tubular body 3 Blood coagulation promoting material 4 Barrier 5 Opening 6 Tapered portion 7 Cap

Claims (1)

[Scope of utility model registration request] 1. A tube body having an opening at the head and a bottom formed at the tip, wherein the bottomed tube is a tapered portion whose diameter gradually decreases toward the tip. In the tapered portion of the bottomed tubular body, a blood coagulation promoting material in which a fibrous substance is punched into a thin circular shape with a diameter smaller than the inner diameter of the opening of the head and larger than the inner diameter of the tip of the tapered portion is accommodated. A blood collection tube having a configuration of: