JPH08600A - Blood collection tube holder - Google Patents

Abstract

(57) [Summary] [Structure] At least the front part of the main body 5 of the blood collection tube holder 1 is tapered forward, and its peripheral walls are arranged at equal intervals in the circumferential direction, and most of the peripheral walls are arranged. And four circular arc portions 9 which are formed into an arc shape and the circumferential end portions of the adjacent circular arc portions 9 projecting radially outward are connected to each other and the diameter of the circular arc portion 9 is elastically deformed. It has a hinge part 10 that allows movement outward in the direction. When the reduced pressure blood collection tube 3 is inserted into the blood collection tube holder 1, the plug 17 of the reduced pressure blood collection tube 3 presses the arc portion 9, the hinge portion 10 is elastically deformed, and the arc portion 9 moves radially outward. By the elastic restoring force of the hinge portion 10, the circular arc portion 9 holds the stopper 17 and the stopper 1
7 compresses the elastic sheath body 14, and the rear part of the blood collection needle 2 penetrates the elastic sheath body 14 and the plug body 17. [Effect] The kickback phenomenon can be prevented.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a blood collection tube holder.

[0002]

2. Description of the Related Art When conducting clinical tests such as serum tests and blood cell tests,
A blood sample is collected by the following blood collecting device. That is, the blood collection device includes a blood collection tube holder, a blood collection needle, and a reduced pressure blood collection tube. A blood collecting needle that penetrates the needle mounting portion at the front end of the blood collection tube holder is mounted, and an elastic sheath that closes an opening at the rear end of the blood collecting needle is externally fitted to the rear of the blood collecting needle. . Further, the reduced pressure blood collection tube is internally depressurized in accordance with the amount of blood collected required for the blood test, and comprises a bottomed tube and a stopper inserted into the opening of the bottomed tube.

At the time of collecting blood, a blood collecting needle is punctured into the blood vessel, and a decompressed blood collecting tube is inserted into the blood collecting tube holder through the opening at the rear end, and the elastic sheath is compressed axially by the plug. At the same time, the elastic sheath and the stopper of the reduced pressure blood collection tube are passed through the rear part of the blood collection needle, and a predetermined amount of blood sample is collected in the reduced pressure blood collection tube according to the degree of reduced pressure.

By the way, recently, the following automatic chemical analyzers have been remarkably spread. That is, in the above apparatus, the test needle is inserted into the stopper while the reduced pressure blood collection tube is installed in the rack so that the blood sample in the reduced pressure blood collection tube can be collected.

In the above-mentioned device, there is a demand for a reduced-pressure blood collection tube having a small puncture resistance when the test needle is punctured in the stopper so that a blood sample can be easily and efficiently collected. However, when such a reduced-pressure blood collection tube is used, the repulsive force of the compressed elastic sheath body during blood collection becomes larger than the frictional force that tries to hold the blood collection needle in the plug body, and the reduced-pressure blood collection tube is used. There is a phenomenon in which the blood collection needle is pulled out of the stopper and the blood collection needle comes out (known as a kickback phenomenon), and it has been a problem how to solve this phenomenon.

An object of the present invention is to provide a blood collection tube holder which can solve the above problems.

[0007]

In order to achieve the above object, the features of the present invention are as follows: (1) A blood collection tube is inserted into the inside from an opening at the rear end portion. In a blood collection tube holder having a main body and (2) a needle mounting portion provided at a front end portion of the main body, to which a blood collecting needle is mounted, at least the front portion of the main body is tapered forward, At least the front peripheral wall of the main body,
(A) A circular arc portion that forms a large part of the peripheral wall, and (B) is provided so as to project outward in the radial direction, connects the circumferential end portions of the circular arc portion, and is elastically deformed. , And a hinge portion that allows the circular arc portion to move outward in the radial direction.

A plurality of arc portions and hinge portions may be arranged at equal intervals in the circumferential direction.

In addition, the hinge portion may be thinner than the circular arc portion.

[0010]

When collecting blood, the blood collection needle of the blood collection tube holder is pierced into the blood vessel, and then the blood collection tube is inserted into the blood collection tube holder with the plug body in front. As a result, the stopper of the blood collection tube
It abuts the arcuate portion of the tapered peripheral wall of the main body.

After this contact, when the blood collection tube is further inserted into the blood collection tube holder, the plug body presses the arc portion radially outward. By this pressing, the hinge portion is elastically deformed, and the circular arc portion moves radially outward. Then, due to the elastic restoring force of the hinge portion, the stopper body is held by the arc portion with a predetermined holding force.

By the above insertion, the stopper compresses the elastic sheath body, and the rear portion of the blood collecting needle penetrates the elastic sheath body and the stopper body. Blood sample flows in.

When a predetermined amount of blood sample is collected in the reduced pressure blood collection tube, the pressure inside the reduced pressure blood collection tube is increased and the blood collection is completed.
When blood collection is completed, the vacuum blood collection tube is forcibly pulled out from the blood collection tube holder. As a result, the rear portion of the blood sampling needle is pulled out from the plug body and the elastic sheath body, and the elastic sheath body also returns to the original posture, and the elastic sheath body closes the opening of the rear end portion of the blood collection needle.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings of FIGS. 1 to 5. FIGS. 1 and 2 show a blood collecting device, which is a blood collection tube holder 1, a blood collecting needle 2, and a blood collecting needle 2. , A vacuum blood collection tube 3.

As shown in FIGS. 3 to 5, the blood collection tube holder 1 has the reduced pressure blood collection tube 3 inserted therein, and is made of, for example, polypropylene, polyethylene, polyvinyl chloride, or the like.
It is integrally molded with plastics such as polycarbonate and polystyrene. The blood collection tube holder 1 has a main body 5
And a needle mounting portion 6 protruding from the front end of the main body 5 in a tapered shape.
And a flange portion 7 projecting radially outward from the rear end portion of the main body 5.

The main body 5 has a substantially cylindrical shape, and means at least its front portion (at least the front portion, the front portion, the front portion and the center portion in the front-rear direction, the entire portion excluding the rear end portion, or the entire portion. The same shall apply hereinafter) is tapered toward the front, and at least the front peripheral wall of the main body 5 has an arc portion (sometimes referred to as a main constituent portion) 9 and a hinge portion (projection, It is also referred to as an elastically deformable portion or a connecting portion.) 10.

Four arc portions 9 and hinge portions 10 (arbitrary plural numbers or a single number may be provided) are arranged at equal intervals in the circumferential direction. The arc portion 9 has an arc shape,
Most of the peripheral wall (eg, 65, 70, 75, 80, 85, 90, or 95 at any% above 65%).
% Or more)). The hinge portion 10 has a triangular cross section between the adjacent circular arc portions 9 and is projected outward in the radial direction to connect the circumferential end portions of the adjacent circular arc portions 9 with each other and to elastically deform the same. This allows the circular arc portion 9 to move radially outward. The hinge portion 10 is preferably thinner than the circular arc portion 9 so as to be easily elastically deformed, but may be the same thickness as the circular arc portion 9. or,
The circumferential width and the radial protrusion height of the hinge portion 10 are increased toward the front, and the elastic deformation amount of the hinge portion 10, that is, the radial movable amount of the arc portion 9 is forward. It is designed to grow as you go.

The blood collection needle 2 is attached to the needle mounting portion 6 of the blood collection tube holder 1, is located at the center of the blood collection needle 2 in the front-rear direction, and is screwed to the center of the needle mounting portion 6 of the blood collection tube holder 1. The hub 12 is attached to the hub 12, and the needle body 13 is inserted into the hub 12 and has a hollow shape. Needle body 13
An elastic sheathing body 14 fixed to the hub 12 and made of rubber is externally fitted on the rear side of the hub 12 so that the opening at the rear end of the needle body 13 is openably and closably closed.

The reduced pressure blood collection tube 3 is placed in the blood collection tube holder 1,
It is inserted from the opening at the rear end thereof, and the inside is decompressed, and the bottomed tube 16 having a circular cross section with one end open and the other end closed, and the bottomed tube 16 is fitted into the opening. It is composed of a plug body 17 which is attached and which removably closes the opening. The bottomed tube 16 is made of glass or plastic. Plug 17
In the embodiment, is made of rubber, but the plug body 17 may be made of a main body made of rubber and a plastic cover fitted on the outer surface of the main body. Further, the plug body 17 has a central puncture portion 18 and a fitting portion 19. The central puncture portion 18 is
The stopper 17 is located at the central portion in the radial direction, has a relatively short axial length, and the blood sampling needle 2 is punctured. Fitting part 19
Is located on the outer periphery of the lower portion of the plug body 17, has a long axial length, and is fitted to the bottomed tube 16 with a large fitting force.
Further, the profile of the cross section of the plug 17 is circular, and
The outer peripheral surface 20 at the top of the plug 17 is tapered toward the front.

According to the embodiment configured as described above, when collecting a blood sample in the reduced pressure blood collection tube 3, first, the blood collection needle 2 of the blood collection tube holder 1 is punctured into the blood vessel. In this state, since the opening at the rear end of the blood collection needle 2 is closed by the elastic sheath body 14, blood does not leak into the blood collection tube holder 1 and the blood collection tube holder 1, the reduced pressure blood collection tube 3, etc. are not contaminated. .

Next, as shown in FIG. 1, the reduced pressure blood collection tube 3 is inserted into the blood collection tube holder 1 through the opening at the rear end of the stopper body 1.
When inserted with 7 in front, the stopper 17 of the vacuum blood collection tube 3 becomes
It abuts the circular arc portion 9 of the tapered peripheral wall of the main body 5.

After this contact, when the reduced pressure blood collection tube 3 is further inserted into the blood collection tube holder 1, the plug body 17 presses the arc portion 9 radially outward. By this pressing, as shown in FIGS. 2 and 5, the hinge portion 10 is elastically deformed so as to slightly expand in the circumferential direction, and the circular arc portion 9 moves radially outward. Then, due to the elastic restoring force of the hinge portion 10, the stopper 17 is held by the arc portion 9 with a predetermined holding force.

By inserting the reduced-pressure blood collection tube 3 as described above, the plug body 17 compresses the elastic sheath body 14, and the rear portion of the blood collection needle 2 penetrates the elastic sheath body 14 and the plug body 17. This allows
A predetermined amount of blood sample flows from the blood vessel into the reduced-pressure blood collection tube 3 through the blood collection needle 2 in accordance with the degree of reduced pressure. Before the blood collecting needle 2 penetrates the central puncture portion 19 of the stopper 17, the stopper 17 contacts the arc portion 9 and receives a holding force from the arc portion 9.

When a predetermined amount of blood sample is collected in the reduced pressure blood collection tube 3 as described above, the pressure inside the reduced pressure blood collection tube 3 is increased and the blood collection is completed. When blood collection is completed, the reduced pressure blood collection tube 3 is forcibly pulled out from the blood collection tube holder 1.

As a result, the rear portion of the blood sampling needle 3 is pulled out from the plug body 17 and the elastic sheath body 14, and at the same time, the elastic sheath body 14 is pulled out.
Also returns to its original state and the opening of the rear end portion of the blood collection needle 3 is closed by the elastic sheath body 14, so that blood does not leak into the blood collection tube holder 1, and the blood collection tube holder 1, the reduced pressure blood collection tube 3, etc. Is not contaminated.

As described above, when the reduced pressure blood collection tube 3 is inserted into the blood collection tube holder 1, the reduced pressure blood collection tube 3 is held by the arc portion 9 with a predetermined holding force. Like the blood collection tube 3, even if the length of the central puncture portion 18 of the plug body 17 in the axial direction is 1 to 2.5 mm and the puncture resistance is small, the repulsive force of the compressed elastic sheath body 14 causes ,
The kickback phenomenon in which the reduced-pressure blood collection tube 3 retracts and the blood collection needle 2 comes off from the plug 17 does not occur.

Further, in the blood collection tube holder 1, most of the tapered peripheral wall can be moved outward in the radial direction.
Since the stopper 17 having the tapered outer peripheral surface 20 is inserted into the inside of each of the circular arc portions 9, the reduced pressure blood collection tube 3 is inserted into the blood collection tube holder 1. When the peripheral wall of the blood collection tube holder 1 and the plug body 17 are in contact with each other during insertion and removal, the contact area can be made large and almost constant.

As a result, when the reduced-pressure blood collection tube 3 is inserted into or removed from the blood collection tube holder 1, the holding force per unit area of the stopper 17 increases or decreases with a small value, and the peripheral wall of the blood collection tube holder 1 is attached to the stopper 17. You don't have to dig into. Therefore,
When the reduced pressure blood collection tube 3 is inserted into or removed from the blood collection tube holder 1, the holding force of the reduced pressure blood collection tube 3 can be gradually increased or decreased to prevent a rapid increase or decrease. Can be inserted and removed. Therefore, the blood collection tube holder 1 for the reduced pressure blood collection tube 3
There is no possibility of damaging the blood vessel with the blood collection needle 2 due to excessive force due to a rapid increase or decrease in the holding force of the reduced pressure blood collection tube 3 when the blood collection needle 2 is inserted or removed.

Further, as described above, the contact area of the peripheral wall of the blood collection tube holder 1 and the stopper 17 is large and substantially constant during contact, so that the peripheral wall of the blood collection tube holder 1 and the stopper 17 are in contact with each other. As compared with the conventional product in which the contact area is small and fluctuates, the blood collection tube holder 1 and the reduced pressure blood collection tube 3 can be manufactured at low cost without requiring high precision.

Further, since the four hinge portions 10 project from the main body 5 outward in the radial direction, these hinge portions 10 also serve as a slip stopper for the blood collection tube holder 1, and the blood collection tube holder 1
Easy to operate.

6 and 7 show the second and third embodiments of the present invention, in which the cross section of the hinge portion 10 has an inverted U shape or a trapezoidal (rectangular) shape.

[0032]

As described in detail above, according to the present invention,
The kickback phenomenon can be effectively prevented. Further, the blood collection tube can be softly inserted into and removed from the blood collection tube holder, and when the blood collection tube is inserted into and removed from the blood collection tube holder, there is no possibility of damaging the blood vessel with the blood collection needle due to excessive force. Further, the hinge portion also serves as a slip stopper for the blood collection tube holder, and the blood collection tube holder is easy to operate. Further, high precision is not required for the production of the blood collection tube holder or the reduced pressure blood collection tube, and it can be carried out at low cost.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a vertical sectional view showing the first embodiment of the present invention.

FIG. 3 is a perspective view showing a first embodiment of the present invention.

4 is a sectional view taken along the line AA of FIG.

5 is a sectional view taken along the line BB of FIG.

FIG. 6 is a cross sectional view showing a second embodiment of the present invention.

FIG. 7 is a cross sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

 1 Blood Collection Tube Holder 2 Blood Collection Needle 3 Decompression Blood Collection Tube 5 Main Body 6 Needle Attachment Section 9 Arc Section 10 Hinge Section 16 Bottomed Tube 17 Plug Body

Claims (3)

[Claims] 1. A body having a substantially cylindrical shape into which a blood collection tube is inserted from an opening at a rear end thereof, and (2) a front end of the main body, to which a blood collecting needle is attached. In a blood collection tube holder having a needle mounting part, at least a front part of the main body is tapered forward, and at least a peripheral wall of the front part of the main body is (A) arc-shaped, and a large peripheral wall is formed. (B) The circular arc portion forming the part is projected outward in the radial direction to connect the circumferential end portions of the circular arc portion to each other, and the elastic deformation prevents the circular arc portion from moving outward in the radial direction. A blood collection tube holder having an allowable hinge portion. 2. The arc portion and the hinge portion are arranged at equal intervals in the circumferential direction,
The blood collection tube holder according to claim 1, wherein a plurality of blood collection tube holders are provided. 3. The blood collection tube holder according to claim 1, wherein the hinge portion is thinner than the circular arc portion.