JP2591521Y2 - Sample tube - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid collecting tube, and more particularly, to a liquid collecting tube which is used when blood and other liquid samples are collected and stored, and the sample is sucked by a suction needle. It is about.

[0002]

2. Description of the Related Art Conventionally, this kind of sampling tube has a test tube container made of glass or plastic, and a rubber or plastic cap fitted as a sealing member in the opening of the container. I have. In such a liquid collection tube, since the cap is required to have a certain strength and airtightness, the cap has a certain hardness and a certain thickness. For this reason, if a metal suction needle is pierced into the cap, inconvenience such as bending of the suction needle may occur.

Therefore, instead of the cap as described above,
A sealing member composed of a plastic film and a metal foil laminated on the film has been developed.

In a blood collection tube provided with such a seal member, when blood or other liquid sample in the blood collection tube is sucked by a metal suction needle, the suction needle is pierced into the seal member and collected. In some cases, the sample is placed in a liquid tube, and an attempt is made to electrically detect the liquid level of the sample in the sample tube with a suction needle. That is, the suction needle may be used as a liquid level detection electrode, and the liquid level may be detected by a change in capacitance when the suction needle comes into contact with the liquid sample in the liquid collection tube.

[0005] In this case, the suction needle pierced through the seal member comes into contact with the metal foil of the seal member. However, since the suction needle is made of metal and usually has conductivity, the suction needle and the metal foil are used. May be electrically conducted, and the liquid level may not be accurately detected.

[0006]

Therefore, as a countermeasure, as shown in JP-A-3-501168, in addition to a suction needle, a tube having a larger diameter (a perforated tube 55) is prepared. In addition, an apparatus was conceived in which a suction sample and a large-diameter pipe were used to suck a liquid sample from a liquid sampling pipe provided with a seal member similar to the above-mentioned seal member.

That is, in the apparatus, after a large-diameter pipe is pierced into a sealing member of a sample pipe, a suction needle is inserted into the large-diameter pipe to suck a sample from the sample pipe. .

However, according to such an apparatus,
In addition to the suction needle, a large-diameter tube is required, and in order to insert the suction needle into the large-diameter tube, it is necessary to position the two together. There was a problem that it was troublesome.

The present invention has been made in view of the above circumstances, and has as its object to provide a simple and low-cost collection tube capable of electrically correctly detecting the liquid level of a sample in the collection tube. Is to provide.

[0010]

According to the present invention, there is provided a sampling pipe main body having an opening at an upper end for collecting blood and other liquid samples and storing the same, and an opening in the sampling pipe main body. Sealed and provided with a sealing member through which a conductive suction needle for aspirating the sample in the sampling tube main body is provided, and the sealing member is a plastic film and a metal foil laminated on the film. And a hole or notch having a diameter or a width and a length larger than the maximum diameter of a portion of the suction needle pierced by the seal member is provided at substantially the center of the metal foil in the seal member. This is a sampling tube.

Here, for example, a test tube container made of glass or plastic is used as the liquid sampling tube main body. As the sealing member, for example, a member made of a polyethylene terephthalate film and an aluminum foil laminated on the film is used. The sealing member is sealed at the upper end opening of the liquid sampling tube main body by, for example, an adhesive or heat sealing.

A substantially central portion of the seal member is a portion through which a suction needle for sucking the liquid sample in the liquid sampling tube main body is inserted. A hole or notch is provided in the metal foil corresponding to that location. The diameter or width and length of the hole or the width and length of the notch are larger than the maximum diameter of the portion of the suction needle that is pierced through the seal member. Due to the holes or cutouts of such a size provided in the metal foil, the suction needle does not come into contact with the metal foil of the seal member when pierced substantially perpendicularly to the seal member. Therefore, there is no possibility that the suction needle and the metal foil are electrically connected, and the liquid level can be correctly and electrically detected by the suction needle.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to two embodiments shown in the drawings. It should be noted that the present invention is not limited by these.

Embodiment 1 In FIG. 1, a sampling tube T ₁ includes a sampling tube main body 1 and a sealing member 2. The sampling tube main body 1 is a test tube container made of glass, has an upward opening at the upper end, and is used for collecting and storing blood and other liquid samples. An annular flange 3 is provided at the opening edge of the liquid sampling tube main body 1. The seal member 2 is attached and sealed to the upper end opening of the liquid sampling tube main body 1, and a stainless steel suction needle 4 for sucking the liquid sample in the liquid sampling tube main body 1 is pierced therethrough. .

The suction needle 4 also serves as a liquid level detection electrode, and detects the liquid level of the sample by a change in capacitance when the suction needle 4 comes into contact with the sample in the liquid sampling tube main body 1. It is constituted in.

As shown in FIG. 2, a sealing member 2 is composed of two upper and lower films 5 made of polyethylene terephthalate.
5 and one aluminum foil 6 laminated and sandwiched between these films 5.5
And one reinforcing rubber sheet 7 that is attached and laminated on the upper surface of the upper film 5. In general, several kinds of resins and adhesives are laminated on the film 5, as required for strength, water resistance, gas permeability, adhesiveness, design and the like.

As shown in FIGS. 2 and 3, the seal member 2 has a substantially circular planar shape. That is, both of the two films 5.5 and the one aluminum foil 6 are a perfect circular base 5a, 5a, 6a and the base 5a, 5a, 6a.
Opening tabs 5b and 5 extending outward from the periphery of
b.6b. The sheet 7 is a perfect circle.

A single round hole 6c is provided at the center of the base 6a of the aluminum foil 6 in the seal member 2. The diameter of the hole 6c is about twice the maximum diameter of the portion of the suction needle 4 penetrated through the seal member 2.

[0019] According to this solution sampling piece tube T _1, the sealing member 2
The hole 6c having the above-described size is provided at the center of the base 6a of the aluminum foil 6 in the above, so that the suction needle 4 comes into contact with the aluminum foil 6 when pierced substantially perpendicularly into the sealing member 2. Never do. Therefore, there is no possibility that the suction needle 4 and the aluminum foil 6 of the seal member 2 are electrically connected to each other, and the liquid level can be correctly and electrically detected by the suction needle 4 simply and at low cost.

Embodiment 2 In FIG. 4, the sampling tube T ₂ is provided with the same sampling tube main body 1 as in the first embodiment and a sealing member 22 different from that in the first embodiment. The same flange 3 as that in the first embodiment is provided on the opening edge of the sampling tube main body 1. The seal member 22 is attached and sealed to the upper end opening of the sampling pipe main body 1, and the same suction needle 4 as in the first embodiment for sucking the liquid sample in the sampling pipe main body 1 is pierced therethrough. Things.

As shown in FIG. 5, a sealing member 22 is composed of two upper and lower films 5.5 made of polyethylene terephthalate, and one film laminated and sandwiched between these films 5.5. Aluminum foil 6
And one reinforcing rubber projection 27 bonded to the upper surface of the upper film 5.

As shown in FIGS. 5 and 6, the seal member 22 has a substantially circular planar shape. That is, each of the two films 5.5 and the one aluminum foil 6 has a perfect circular base 5a, 5a, 6a and the base 5a, 5a.
An opening tab 5b extending outward from the periphery of 6a.
5b and 6b. The protruding body 27 has a perfectly circular planar shape, and is provided with a hemispherical recess 27a at the center of the upper surface.

The aluminum foil 6 in the sealing member 22
At the center of the base 6a, one hole 6c is provided which is the same as that in the first embodiment.

[0024] According to this solution sampling piece tube T _2, the sealing member 2
The hole 6c having the above-described size is provided at the center of the base 6a of the aluminum foil 6 in FIG. 2, so that the suction needle 4 No contact. Therefore, there is no possibility that the suction needle 4 and the aluminum foil 6 of the seal member 22 are electrically connected to each other, and the liquid level can be electrically correctly detected by the suction needle 4 easily and at low cost.

[0025]

Since the liquid collection tube according to the present invention is constructed as described above, the suction needle does not come into contact with the metal foil when pierced by the sealing member. Therefore,
According to the liquid collection tube according to the present invention, there is no possibility that the suction needle and the metal foil in the sealing member are electrically connected to each other, and the liquid level can be easily and accurately detected at low cost by the suction needle. it can.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of the entire configuration of a liquid collection tube according to a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of the liquid collection tube.

FIG. 3 is a plan view of the liquid collection tube.

FIG. 4 is an explanatory view of the entire configuration of a liquid collection tube according to a second embodiment of the present invention.

FIG. 5 is an enlarged longitudinal sectional view of a main part of the liquid collection tube.

FIG. 6 is a plan view of the liquid collection tube.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sampling pipe main body 2 Seal member 3 Flange body 4 Suction needle 5 Film 6 Aluminum foil (metal foil) 6a Base 6b Tab 6c Hole 22 Seal member

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01N 1/10 A61B 5/14 300 G01N 1/00 101 G01N 33/48 G01N 35/00-35/10

Claims (1)

(57) [Scope of request for utility model registration] 1. A sampling tube main body having an opening at an upper end for collecting and storing blood and other liquid samples, and a sample sealed in the opening of the sampling tube main body, the sample in the sampling tube main body. A sealing member through which a conductive suction needle for piercing is inserted, wherein the sealing member comprises a plastic film and a metal foil laminated on the film; And a hole or notch having a diameter, width, and length greater than the maximum diameter of a portion of the suction needle penetrated through the seal member.