JP2002355237A - Blood collector for peripheral blood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blood collector aid which has a simple structure, is hard to cause subcutaneous bleeding, and enables a user to take a suitable volume of blood by him-/her-self ascertaining a collected volume. SOLUTION: This is a simply structured aid hard to cause subcutaneous bleeding to collect a suitable volume of blood by him-/her-self ascertaining the collected volume. The aid has an opening part to widen a puncture hole and is constituted as follows: a) the opening part has a cylindrical shape, b) the face in contact with the skin of the opening part has a shape sectioned by a plane, c) the inside of the opening part has a shape gradually widened toward the contact face, d) the opening part is constituted of a flexible material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a peripheral blood sampling device which facilitates the collection of peripheral blood by widening the puncture hole when collecting peripheral blood after puncturing the skin with a lancet.

[0002]

2. Description of the Related Art A general method for collecting peripheral blood is as follows.
Earlobe blood has been collected. In addition, in order to measure with the blood glucose self-measuring device, a fingertip is used as a blood collection site.

However, it is difficult to collect earlobe blood by yourself. Further, regarding fingertip blood sampling, there is a problem that the fingertip has a high density of pain sensation and a problem that it is a part that is frequently used in daily life.

[0004] As a blood sampling method other than fingertips, a method of performing vacuum suction after puncturing with a lancet has been used, but there is a problem that subcutaneous hemorrhage is likely to occur, and it is not a good method.

Further, a system has been reported in which a lancet is used to squeeze by alternately pressing with a double ring after puncturing with a lancet.

[0006] However, because of the complicated structure of this device, even if it is molded from a transparent material, it is difficult to see whether blood collection has been successful and how much blood has been obtained.

[0007] In the case of blood collection of about 0.3 µl, because of the softness of the skin, after puncturing with a lancet, only pressing with a transparent and hard cylindrical instrument that is in contact with the skin at a right angle, it is necessary to visually You can collect the necessary blood while watching.

However, in elderly people, 0.3 μl of blood cannot be visually recognized. Further, it is difficult to collect more blood by this method.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a simple structure, to prevent subcutaneous bleeding, and to allow a user, including the elderly, to collect an appropriate amount of blood while checking the collected amount.
An object of the present invention is to provide an auxiliary device for collecting blood from other than a fingertip.

[0010]

Means for Solving the Problems As a result of diligent research, the present inventors have made a flexible tubular instrument, not a tubular hard instrument, which has a portion in contact with the skin. And 9
Using a device that makes contact at an angle of less than 0 degrees, it was found that peripheral blood of about 2 μl or 5 μl could be collected by pressing around the puncture with a lancet and then surrounding it,
The present invention has been completed.

That is, the present invention relates to a device for assisting peripheral blood collection comprising an opening for expanding a puncture opening, the device comprising: a) the opening is cylindrical; and b) the opening in the opening. The surface in contact with the skin is cut by a plane, c) the inside of the opening is gradually widened toward the contact surface, and d) the opening is made of a flexible material. It is a blood sampling device.

This blood sampling device pushes the wound open by pressing it around the wound punctured with a lancet, thereby allowing peripheral blood to be easily collected.

[0013] The blood collection device of the present invention comprises an opening for expanding the puncture opening, but the other portions may have any suitable shape for pressing the opening against the skin. It doesn't matter. Further, the device of the present invention may have only the opening portion as long as there is no inconvenience in handling.

Although the shape of the opening portion is cylindrical, it is sufficient that the opening portion has a hollow portion enough to achieve the purpose of assisting blood collection, and the side opposite to the side (contact surface) pressed against the skin may be closed. . In the blood collection device of the present invention, when there is a portion other than the opening portion, it is joined to the opening portion other than the contact surface of the opening portion. Here, the opening portion and other portions may be integrally molded.

The contact surface of the opening has a shape basically cut off by a flat surface in order to sufficiently adhere to the skin, but the flatness of the flat surface is large. It is sufficient that the portion is in contact with the skin, and strict flatness is not required.

Further, the cylindrical opening portion has a shape that gradually widens toward the contact surface at least on the inside thereof. Including a so-called trumpet type and a megaphone type, it is sufficient that the inside of the vicinity of the contact surface of the opening portion is in contact with the skin at an angle of less than 90 degrees, and the spread is constant throughout like a megaphone. No need.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a method of collecting peripheral blood from a part other than a fingertip, a device such as puncturing with a lancet and squeezing out from the surroundings has been carried out. It is necessary to puncture the blood collection site with a lancet or the like. The preferred site for that is
Forearm, upper arm, thigh, lower leg, and abdomen.

Here, if a thick lancet is used, necessary blood can be easily obtained, but hemostasis is difficult. From the standpoint of hemostasis, it is advantageous to have a needle that is as thin as possible and a puncture that is as shallow as possible. In consideration of securing a necessary blood volume and requesting hemostasis, a 28- to 22-gauge puncture needle is usually used at a depth of 1 to 1.
A 5 mm puncture is appropriate.

The inner surface near the contact surface at the opening of the blood collection device of the present invention contacts the skin at an angle of less than 90 degrees.
The contact angle is preferably from 10 to 85 degrees, more preferably from 30 to 80 degrees.

The hardness of the material of the opening portion may be any as long as it can generate a force to spread the puncture opening when the material is pressed against the skin. This is advantageous in that there is little irritation.

The thickness of the opening near the contact surface is:
0.1 mm or more and 5 mm or less, preferably 0.3 mm or more.
mm or more and 3.5 mm or less. 0.1mm or less,
5m depending on the softness of the material
Above m, sufficient transparency cannot usually be maintained. The thickness of the opening portion near the contact surface is as described above, but the thickness of the other portion of the opening portion may be different from the thickness near the contact surface as long as the effect of expanding the puncture opening is obtained.

The pressure applied during blood collection is 300 g
Is about 5 kg, but the deformation of the material at that time is 5 m
m or less, and it is desirable to determine the flexibility and thickness of the material of the opening portion so as to achieve this.

The material of the opening may be colored, but is preferably a material which is transparent to the extent that blood can be viewed. As such a material, for example, transparent silicon rubber can be cited, but vinyl chloride, polyethylene or the like may be used.

The size of the area inside the contact surface, that is, the size of the skin surface which is covered by the opening when the device of the present invention is used but does not contact the contact surface, is at least a circle having a diameter of 3 mm. And a diameter of 30 m
It is preferable that they are included in the circle of m. If this area is smaller than this, the blood collection device tends to overlap the puncture port, which is not preferable. If they overlap, the collected blood will spread. On the other hand, if this area is larger,
Depending on the shape of the skin surface, the degree of adhesion is low, which is not desirable.

The shape of the contact surface is preferably a donut shape, that is, a shape of a region surrounded by two concentric circles.
The size is preferably 5 mm or more and 25 m in inner diameter.
m or less, more preferably 8 mm or more and 20 m in inner diameter.
m or less. The case where the contact surface is not a donut shape may be considered according to this.

When the contact surface has an elliptical shape, it is advantageous for the opening of the elliptical hole to match the longer elliptical hole with the longer puncture opening.

In the blood collection device of the present invention, the portion other than the opening is joined to the opening at a position other than the contact surface of the opening (including the case where both are integrally molded). Preferably, it is joined to a part other than the opening on the side opposite to the contact surface with the skin. The shape of the portion other than the opening is preferably cylindrical.

After using the blood collection device of the present invention, blood that has come out of the skin may be collected by appropriate means. The device for that purpose is integrated with the blood collection device of the present invention, and It may be mounted on the opposite side of the opening or on the same side.

[0029]

EXAMPLES (Example 1) Using a transparent silicone rubber,
A so-called trumpet-shaped cylindrical device in which the opening gradually widens toward the contact surface with the skin and the inside of which contacts the skin at an angle of less than 90 degrees was produced (FIG. 1).
reference). After puncturing at a depth of 1 mm with a lancet of 22 gauge, place the instrument of the present invention on the upper part of the puncture opening,
I was oppressed. The wound is opened by a single push and 3μ easily
1 or more spherical peripheral blood could be obtained. When the blood is wiped and pressed again with the device of the present invention, the wound opens again,
More than 3 μl of blood was obtained.

(Comparative Example 1) A device similar to that of Example 1 was prepared except that the inside of the opening had a constant inner diameter, and the outside gradually narrowed toward the contact surface with the skin (FIG. 2). reference). After puncturing at a depth of 1 mm with a 22-gauge lancet, the instrument was placed above the puncture opening and pressed. First, about 0.5 μl of blood was collected, but no more blood was obtained because the puncture opening was closed by pressing the instrument.

(Comparative Example 2) A device similar to that of Example 1 was prepared except that the length of the opening was short and the inside and outside of the opening had a constant diameter (see FIG. 3). 28
After puncturing at a depth of 1 mm with a lancet of a gauge, the instrument was placed above the puncturing opening, and pressed. First 0.
5 μl of blood was collected. Thereafter, compression was repeated three more times, but no more than 1 μl of blood was obtained.

[0032]

According to the present invention, there is provided a blood collection assisting device having a simple structure, hardly causing subcutaneous hemorrhage, and capable of easily collecting an appropriate amount of blood by itself.

[Brief description of the drawings]

FIG. 1 is a longitudinal section of an example of the blood collection device of the present invention. The cross section forms a double circle.

FIG. 2 is a longitudinal section of a blood collection device (reference example) in which the inside of a portion corresponding to an opening in the present invention has a constant inner diameter.

FIG. 3 is a longitudinal section of a blood collection device (reference example) in which the inside of a portion corresponding to an opening in the present invention has a constant inner diameter.

[Explanation of symbols]

1 Opening portion in the blood collection device of the present invention. 2 A part for grasping other than the opening part in the blood collection device of the present invention. 3 A portion corresponding to the opening in the present invention in the blood collection device of the reference example. 4 A part for grasping in the blood collection device of the reference example. 5 In the blood collection device of the reference example, a portion corresponding to the opening in the present invention. 6 A part for grasping in the blood collection device of the reference example.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4C038 TA10 UB10

Claims (5)

[Claims] 1. A device for assisting peripheral blood collection comprising an opening for puncture opening expansion, comprising: a) the opening is cylindrical; b) contact with the skin at the opening. The contact surface has a shape cut by a plane, c) the inside of the opening portion is gradually widened toward the contact surface, and d) the opening portion is made of a flexible material. Blood collection equipment. 2. The blood collection device according to claim 1, wherein the opening is made of a transparent material. 3. The area inside the contact surface includes a circle having a diameter of at least 3 mm and a diameter of 30 mm.
The blood collection device according to claim 1 or 2, wherein the blood collection device is included in the circle. 4. The blood collection device according to claim 1, wherein the shape of the contact surface is a shape of a region surrounded by two concentric circles. 5. The blood collection device according to claim 1, wherein the opening is joined to a cylindrical member on a side opposite to the contact surface.