JPH0621443Y2 - Vacuum blood collection tube - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum blood collection tube for collecting a blood sample used for blood test.

[0002]

2. Description of the Related Art Conventionally, various blood collecting devices have been used in clinical tests such as biochemical tests and serum tests.
For example, a blood collection device including a blood collection tube whose interior is decompressed and a blood collection tube holder capable of accommodating the blood collection tube and having a hollow puncture needle at its tip is often used.

By the way, such a reduced pressure blood collection tube is set at an appropriate reduced pressure value according to the amount of blood collected inside the tubular body when it is manufactured in a factory. The manufactured blood collection tube is stored under the user's use until it is used in a hospital, a clinic or the like. The number of days for storing the blood collection tube varies depending on the user, but if it is long, it may be 2-3 years. Since the stopper is made of rubber during storage of the blood collection tube for these long periods of time, air may enter the inside from the stopper. In such a case, the degree of decompression in the blood collection tube is not maintained, and it becomes difficult to collect a predetermined amount of blood when using it for blood collection. For this reason, conventionally, a method of increasing the thickness of the plug has been adopted in order to ensure the airtight performance at the storage stage in the blood collection tube. However, when the plug is made thick, it is difficult for the puncture needle to puncture during use and workability is poor.

Therefore, in order to solve such a problem, a reduced pressure blood collection tube disclosed in Japanese Patent Publication No. 3-16134 has been proposed. That is, in this reduced pressure blood collection tube, the plug is composed of a gas barrier member that covers the entire opening of the tube and a seal member that can close the needle hole after the hollow needle that punctured the plug during blood collection is removed. By the gas barrier member,
The degree of reduced pressure inside the blood collection tube is substantially maintained until the time of blood collection, and the degree of reduced pressure inside the blood collection tube is secured for a long period of time.

In the present specification, "gas" means
Not only gas such as oxygen gas and carbon dioxide gas but also water vapor is included, and the "gas barrier property" is not limited to the one that completely shields gas, and the oxygen gas is 0.1 × 10 ^-10 m
l · mm / cm ² · sec · cmHg (20 ° C), 1 × 1 ^-3 g · mm / m ² · 24hrs (40 ° with steam)
C, 90% RH) is also included, and the point is to have a practical "gas barrier property".

[0006]

By the way, there is a case where, for example, after removing the stopper for the inspection and performing the inspection, the second inspection is performed after a lapse of a certain time. At this time, until the second inspection, in order to ensure the accuracy of the inspection result, it is necessary to store the blood collection tube with the tube body plugged again. Also, when the blood is discarded after the examination, it is necessary to plug it again. However, in the above-mentioned conventional example, the sealing member is used only for closing the needle hole, and when re-plugging as described above is required, it is necessary to prepare a separate plug body. there were.

An object of the present invention is to provide a reduced pressure blood collection tube which solves the above problems.

[0008]

In order to solve the above-mentioned problems, a feature of the present invention is that a decompressed blood collection tube whose inside is appropriately decompressed in accordance with the blood collection amount has one end open and the other It has a bottomed tubular body with an end closed and a plug body attached to the opening of the bottomed tubular body and capable of being punctured by a hollow needle. The plug body substantially reduces the degree of decompression inside the blood collection tube until blood collection. In order to hold the gas barrier member covering the entire opening of the tube body and the gas barrier member, the needle hole can be closed after the hollow needle puncturing the stopper at the time of blood collection is removed, and Therefore, it is a point which is composed of a seal member that can re-plug the opening of the tube body from which the plug body has been removed.

[0009]

According to the present invention, there are the following actions. By providing the gas barrier member that covers the entire opening of the tubular body, the degree of pressure reduction inside the reduced pressure blood collection tube can be secured for a long period of time. When the vacuum blood collection tube is opened once and needs to be plugged again by making the seal member re-pluggable, it can be plugged again with the seal member, so a separate plug body is prepared. No need. Further, by making the seal member re-pluggable, the outer diameter of the seal member is naturally larger than the opening of the bottomed tubular body. Therefore, the area of the seal member is relatively large, and therefore, when the hollow needle is punctured, it is possible to prevent it from being off the mark.

[0010]

1 is a sectional view of an embodiment of the present invention, and FIG. 2 is an exploded perspective view thereof. The reduced-pressure blood collection tube 1 is composed of a bottomed tube body 2 and a plug body 3 that closes the opening of the bottomed tube body 2, and the inside thereof is decompressed by a predetermined blood collection amount. The bottomed tubular body 2 is a tubular body having one end open and the other end closed, and an annular flange 4 protruding outward is provided in the opening. The flange 4 forms a fixing portion with the gas barrier member 5 of the plug body 3 described later. The material of the bottomed tubular body 2 is preferably one having a high gas barrier performance, for example, a mixture of a low melting point polyester and a xylene group-containing polyamide, to which a transition metal salt is added is preferable.

The plug body 3 attached to the opening of the bottomed tube body 2 is composed of a gas barrier member 5 having a high airtightness covering the entire area of the opening and a seal member 6 provided on the gas barrier member 5. ing. The gas barrier member 5 is in the form of a film, and includes a circular main body 5A and a peeling portion 5B extending downward from the peripheral edge of the main body 5A.

The gas barrier member 5 has substantially the same degree of decompression inside the bottomed tube body 2 before the use of the reduced pressure blood collection tube 1, that is, before the puncture needle (described later) is punctured in the plug body 3 during blood collection. It is necessary to use a material having a high airtightness to hold it properly. In this respect, as the material of the gas barrier member 5, a metal thin film such as an aluminum foil, an ethylene-vinyl alcohol copolymer, a resin film material such as polyvinylidene chloride, or the like is used. An aluminum foil or an aluminum vapor-deposited film having an excellent gas barrier property is preferable. The thickness of the needle puncture portion of the gas barrier member 6 is 5μ to 300μ, preferably 20μ to
The thickness is 100 μ, and the thickness does not necessarily have to be uniform.

The gas barrier member 5 and the bottomed tubular body 2 may be fixed to each other by applying an adhesive to the upper surface of the flange 4 of the bottomed tubular body 2 to bond the gas barrier member 5 or the bottomed tubular body. As the material forming the body 2 and the material forming the gas barrier member 5, materials having compatibility with each other may be selected and they may be fused by heat, ultrasonic waves, or the like. The adhesive strength may be such that it can be peeled off so that it can be opened later.

The seal member 6 closes the needle hole and is in a liquid-tight state after the reduced pressure blood collection tube 1 is used, that is, after the puncture needle (described later) has punctured the plug 3 and removed. In addition to the function of holding the plug, the plug 3 is removed and the opening of the bottomed tubular body 2 is plugged again. As a material of the seal member 6, natural rubber, isoprene rubber,
A rubber material such as a thermoplastic elastomer is used. Vulcanized rubber having excellent sealing properties is preferable.

In addition, the seal member 6 has a cylindrical base portion 6A from the point of having a function of re-plugging the opening portion of the bottomed tubular body 2.
It is composed of a cylindrical skirt portion 6B connected to the base portion 6A,
The outer diameter is selected to be at least larger than the inner diameter of the opening of the bottomed tubular body 2. The seal member 6 has such a length that the skirt portion 6B can be brought into close contact with the inner wall of the bottomed tubular body 2 to sufficiently secure a liquid-tight state when used for re-plugging. is necessary. Therefore, the length of the seal member 6 in the thickness direction is preferably 2 mm or more.
Further, the seal member 6 may be coated on its entire outer surface with silicon. With this configuration, when the plug is re-plugged, it can be smoothly inserted into the opening of the bottomed tubular body 2.

Next, the operation of the reduced pressure blood collection tube 1 having the above structure will be described. When collecting blood using the reduced pressure blood collection tube 1, a blood collection needle (not shown) attached to a blood collection device (not shown) is punctured into the blood vessel. Next, the reduced pressure blood collection tube 1 is inserted into the blood collection instrument until the tip of a puncture needle (not shown) formed at the rear end of the blood collection needle reaches the inside of the reduced pressure blood collection tube 1. At this time, the puncture needle punctures the seal member 6 and then the gas barrier member 5, and the rear end portion of the puncture needle, which is a hollow needle, is pierced into the bottomed tubular body 2 in a depressurized state. As a result, it becomes possible to introduce blood from the front end to the rear end of the hollow puncture needle due to the reduced pressure inside the bottomed tubular body 2. As a result, blood flows into the bottomed tubular body 2 and blood is collected.

The decompressed blood collection tube 1 for which blood collection has been completed is carried to an automatic inspection device or the like and subjected to the necessary inspection. At the time of this inspection, the reduced pressure blood collection tube 1 is inspected with the stopper 3 removed. Therefore, just before setting the reduced pressure blood collection tube 1 in the inspection device, the peeling portion 5B of the gas barrier member 5 is gripped and peeled by a hand or the like. Thereby, the gas barrier member 5
It is removed from the opening of the reduced pressure blood collection tube 1 together with the seal member 6.

After the completion of the first inspection, after a certain time has elapsed, 2
When the second examination is required, the reduced pressure blood collection tube 1 needs to be stored. Therefore, the plug body 3 is turned upside down, and the skirt portion 6B of the seal member 6 is inserted into the opening of the bottomed tubular body 2 and plugged again, as shown in FIG. At this time, the seal member 6 may be removed from the gas barrier member 5 in advance, or the seal member 6 may be used in a state in which the gas barrier member 5 is fixed. Incidentally, it is necessary to re-plug even when the blood is discarded, and in such a case as well, it can be re-plugged using the seal member 6 in the same manner as described above.

According to the reduced pressure blood collection tube 1 having such a structure, since the plug 3 is provided with the gas barrier member 5, it is possible to ensure an airtight state after the manufacture and before use. In addition, the presence of the seal member 6 allows the plug body 3 to secure a liquid-tight state after the puncture needle is punctured and removed. Further, since the area of the seal member 6 is large, it does not become a mistake when the puncture needle is punctured.

[0020]

As described above, according to the present invention, there is no need to perform an opening operation such as pulling out the stopper from the opening of the tube at the time of collecting blood, and the handling is easy. Further, even if the number of storage days after manufacture of the reduced pressure blood collection tube before use is long, the degree of pressure reduction inside the blood collection tube can be maintained. or,
When it is necessary to open the vacuum blood collection tube once and then plug it again, the vacuum blood collection tube can be plugged again with the sealing member, and therefore it is not necessary to separately prepare a plug body. Further, when the hollow needle is pierced into the plug body, it is possible to prevent misalignment.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a state where the sealing member is re-plugged into the bottomed tubular body.

[Code]

 DESCRIPTION OF SYMBOLS 1 Decompression blood collection tube 2 Bottomed tube body 3 Plug body 5 Gas barrier member 6 Seal member 6A Base portion of seal member 6 6B Skirt portion of seal member 6

Claims (1)

[Scope of utility model registration request] 1. A reduced-pressure blood collection tube whose inside is appropriately decompressed according to the amount of blood collected, and is attached to a bottomed tube body having one end opened and the other end closed, and an opening part of the bottomed tube body, The hollow needle has a pierceable plug, and the plug has a gas barrier member covering the entire opening of the tube body and a gas barrier member on the gas barrier member so as to substantially maintain the degree of decompression inside the blood collection tube until blood collection. A seal member that is provided and that can close the needle hole after the hollow needle that punctured the stopper at the time of blood collection is removed and that can re-close the opening of the tube body from which the stopper was removed for inspection. A decompressed blood collection tube comprising: