JPH0551308U - Blood collection tube for vacuum blood collection tube - Google Patents

Abstract

(57) [Summary] [Purpose] This is a holder with an adapter that can handle rubber plugs and caps of vacuum decompression blood collection tubes and their flanges of different sizes. It can be punctured in the center, and (2) it can prevent the backlash phenomenon.
(3) To provide a blood collection tube holder in which the gripping force of the blood collection tube due to fatigue of the adapter does not decrease. [Constitution] In a blood collection tube for a reduced pressure blood collection tube, an adapter is provided along the inner wall of the blood collection tube, and the tip of the adapter on the blood collection needle side is cut out into a plurality of plate-like parts, and each tip of the plate-like part is of a cross section of the blood collection tube. A blood sampling tube that is inclined toward the center line and has a plate-shaped portion reinforced with an elastic member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a blood collection tube that receives a reduced-pressure blood collection tube used for blood collection.

[0002]

[Prior Art]

 Conventionally, a blood collection tube that receives a reduced-pressure blood collection tube used for blood collection is set according to the diameter of the collar of the rubber plug of the reduced-pressure blood collection tube. Looking at various decompressed blood collection tubes, the inner diameter of the current blood collection tube is set to a substantially constant size because the rib diameter of this rubber stopper is set to be almost the same.

[0003]

[Problems to be solved by the device]

 As for the recent decompression blood collection tubes, those with a large capacity are no longer used, and relatively small decompression blood collection tubes are often used, and the brim diameter of the rubber stopper of the decompression blood collection tube has become smaller. . If the diameter of the rubber stopper is small, there is a problem that the needle does not stick to the puncture part, which is the center of the rubber stopper, at the time of collecting blood, while the inner diameter of the blood collecting cylinder remains large.

For example, when the blood sampling needle obliquely penetrates the puncture portion of the rubber stopper and reaches the rubber stopper skirt portion, the resistance force when pulling out the blood sampling needle increases the fitting force between the reduced pressure blood collection tube and the rubber stopper. It was observed that the rubber stopper came off from the vacuum blood collection tube during the blood collection operation.

Further, recently, an automatic analyzer capable of collecting a sample by puncturing with a reduced pressure blood collection tube installed on a rack without removing the rubber stopper has been remarkably popular, and a reduced pressure blood collection tube having a small resistance to puncture the rubber stopper is required. ing. If the puncture resistance of the rubber stopper is small, the resistance at the time of pulling out the needle will also be small at the same time, and it will not be able to withstand the repulsion of the sheath-shaped cover that is present on the blood collection needle, and the blood collection tube will naturally separate from the blood collection tube during the blood collection operation. There is also the problem that the rubber plug and all the rubber plugs fall out of the punctured needle (this phenomenon is referred to as the “backlash phenomenon” hereinafter).

In order to solve the above two problems, the present inventor previously proposed a blood collecting tube for a reduced pressure blood collecting tube using an adapter in Japanese Patent Application No. 3-93303.

The blood collecting tube for vacuum blood collection tube of Japanese Patent Application No. 3-93303 is one in which a blood collecting needle is punctured at the center of the puncture part of a rubber stopper, and it is preferable as a means for suppressing the backlash phenomenon. In the case of using the resin of No. 3, the polyolefin was gradually fatigued as the degree of use increased, and the scratching phenomenon could not be prevented eventually, which was not always satisfactory.

The present invention further improves the previously proposed blood collection tube for a reduced pressure blood collection tube, and provides a blood tube for a reduced pressure blood collection tube with an adapter having good durability.

[0009]

[Means for Solving the Problems]

 The present invention has a hub in the middle of a hollow needle body, a blood vessel puncturing portion on one end side, and a plug body puncturing portion for puncturing a plug of a vacuum blood collection tube on the other end side. In a blood sampling tube equipped with a blood sampling needle in which the entire puncture portion is covered with a sheath-like elastic covering cover extending from the hub, a flexible resin is provided along the inner wall of the blood sampling tube. A tubular adapter is provided, and the tip of the adapter on the blood collection needle side is cut out into multiple plates, and the plate portion is inclined toward the center line of the cross section of the blood collection tube and elastic at each tip of the plate portion. A gist of a blood collecting tube for a reduced-pressure blood collection tube, which is characterized in that a member having a is attached.

[0010]

[Action]

 According to the present invention, the tip of the adapter in the blood collection tube on the side of the blood collection needle is cut out into a plurality of plates, and each tip of the plate-shaped portion is inclined toward the center line of the cross section of the blood collection tube. Even if the one with a rubber stopper of the size is inserted, it is grasped by this and the blood sampling needle can be punctured at the center of the puncture part of the rubber stopper during blood sampling.

Since the adapter is made of a flexible material, the gripping force prevents the backlash phenomenon.

By attaching an elastic member, for example, a rubber ring, to the tip of the plate-shaped portion of the adapter on the blood collection needle side, the gripping force for the blood collection tube can be maintained even if the adapter plate-shaped portion is fatigued. You can

[0013]

【Example】

 The present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an example of a tubular adapter in a blood collecting tube of the present invention, and FIG. 2 is a side view of an example of providing a tubular adapter in the blood collecting tube of the present invention.

FIG. 3 and FIG. 4 are simple side views showing the operating state using the example blood collection tube for a reduced pressure blood collection tube of the present invention.

The adapter 1 mounted in the blood collection tube 4 for reduced-pressure blood collection tube has a tubular shape as shown in FIG. 2, one end of which is cut off into a cylindrical open end, and the other end of which is cut out into four plate shapes. The plate-like portion 3 is inclined toward the center of the cylinder, and is provided with a rubber-like ring 12 having elasticity at its tip.

The adapter 1 is inserted into the blood collection tube 4 so that the tip 2 of the adapter 1 approaches the puncture needle as shown in FIG. A joint surface 5 is formed between the inner surface of the blood collection tube 4 and the outer surface of the adapter 1 between them. Various methods may be adopted for forming the joint surface 5, such as using the frictional force to fix the adapter 1, completely integrating by adhesion, fixing with a screw, or fitting. , It may be integrated or detachable. However, in consideration of cleaning the inside of the blood collection tube 4 after the blood collection operation, it is preferable that the blood collection tube 4 be detachable by fitting. FIG. 2 shows the case of fitting by fitting.

When collecting blood, the reduced pressure blood collection tube 7 is inserted into the adapter 1 in this integrated state (FIG. 2), and the operation is started (FIG. 3).

The decompression blood collection tube 7 to be used has a small head portion (a flange of the rubber stopper, a cap portion, a flange portion thereof, etc.), whereas the decompression blood collection tube 7 has a plate-shaped tip 2 from the inner wall of the adapter 1. To the center of the blood sampling tube 4, and the blood sampling needle 9 is punctured in the center of the plug puncturing section 10 (FIG. 4A).

When a reduced pressure blood collection tube 7 having a large head and a thin plug puncture portion 10 is designed to be inserted into the adapter 1, the plate-like tip portion 2 of the adapter expands, and the stress thereof causes stress. The head of the decompression blood collection tube 9 is fixed by using the sheath-like elastic cover cover 8 extending from the hub to prevent the backlash phenomenon (FIG. 4B).

In either case, the adapter plate-shaped portion is fixed at the position of the hook-shaped portion 3 and blood can be collected. The reduced pressure blood collection tube 7 is not inserted beyond this fixed position, and the gripping force for the blood collection tube at that position is reinforced by the rubber-like ring 12 having elasticity.

The dimensions of the blood collection tube of the present invention are shown below by specific numerical examples. The adapter 1 has a total length of 52 mm, the adapter 1 has an outer diameter of 20 mm, an inner diameter of 18.5 mm, and a length of 25 mm at the joint surface between the blood collection cylinder 4 and the adapter 1. 0.8mm, width 5mm, outermost part 13mm outside diameter, hook-shaped inside diameter 10mm.

[0022]

[Effect of the device]

 The present invention (1) allows the blood collection needle to be punctured at the center of the puncture part of the rubber stopper when collecting blood even when the rubber stopper of the vacuum blood collection tube has a small diameter, (2) it can prevent the backlash phenomenon, and (3) fatigue of the adapter. This has the effect of preventing a decrease in the gripping force on the blood collection tube due to.

[Brief description of drawings]

FIG. 1 is a perspective view of an example of a tubular adapter of the present invention.

FIG. 2 is a side view of an example in which a tubular adapter is provided in the blood collection tube of the present invention.

FIG. 3 is an explanatory view before collecting blood, in which a cylindrical adapter is provided in the blood collecting cylinder of the present invention.

FIG. 4 is an explanatory view showing a state after blood collection by providing a tubular adapter in the blood collection tube of the present invention. (A) shows a case where blood is collected with a blood collection tube having a small rubber stopper collar diameter, and (B) shows a case where blood is collected with a blood collection tube having a large rubber stopper collar diameter and a thin puncture portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adapter 2 Adapter tip part 3 Adapter hook part 4 Blood collection tube 5 Joining surface of adapter to blood collection tube 6 Tip end surface of blood collection tube on which blood collection needle is fixed 7 Blood collection tube 8 Cover cover 9 Puncture needle 10 Plug body puncture portion 11 Puncture needle Vessel puncture side tip 12 Rubber ring

Claims (2)

[Scope of utility model registration request] 1. A hollow needle main body having a hub at an intermediate portion, a blood vessel puncturing portion at one end side, and a plug body puncturing portion for puncturing a plug body of a vacuum blood collection tube at the other end side, In a blood sampling tube having a blood sampling needle formed by covering the entire plug puncturing section with a sheath-like elastic covering cover extending from the hub, a flexible resin is provided along the inner wall of the blood sampling tube. A tubular adapter is provided, and the tip of the adapter on the blood collection needle side is cut out into a plurality of plate-like parts, and the plate-like part is inclined toward the center line of the cross section of the blood-collecting cylinder so that each tip of the plate-like part has elasticity. A blood collection tube for a reduced pressure blood collection tube, characterized in that a member having the above is attached. 2. The blood collection tube for a reduced pressure blood collection tube according to claim 1, wherein the elastic member is a rubber ring.