WO2021145637A2

WO2021145637A2 - Pain-free blood collection device

Info

Publication number: WO2021145637A2
Application number: PCT/KR2021/000375
Authority: WO
Inventors: 이성용
Original assignee: 이성용
Priority date: 2020-01-13
Filing date: 2021-01-12
Publication date: 2021-07-22
Also published as: KR102406426B1; WO2021145637A3; KR20210091401A

Abstract

A pain-free blood collection device according to the present invention comprises: a cylindrical blood collection body; a blood collection cap which is made of a transparent material, detachably coupled to a front end portion of the blood collection body, and provided with a skin contact end having a through-hole formed in the center thereof; a needle holder which is installed at the front end portion of the blood collection body and moves in a straight line between an operation position, at which the needle holder protrudes from the front end portion toward the through-hole of the blood collection cap, and a standby position, at which the needle holder is inserted into the front end portion; a blood collection needle which is detachably mounted to the needle holder, and which protrudes outward via the through-hole of the blood collection cap and punctures the skin to a predetermined depth when the needle holder is in the operation position; an elastic member which is elastically installed between the blood collection body and the needle holder and imparts an elastic force so that the needle holder is constantly in the standby position; a driving means which is installed in the blood collection body and is for moving the needle holder from the standby position to the operation position; an exhaust tube which is installed inside the blood collection body and communicates the interior and exterior of the blood collection cap; a compact vacuum pump which is installed in the exhaust tube inside the blood collection body, and is for forcibly discharging air inside the blood collection cap to the outside; a power supply unit which is provided in the blood collection body, and is for supplying power to the compact vacuum pump; and a switch which is provided in the blood collection body, and is for controlling the driving of the compact vacuum pump.

Description

painless blood draw

The present invention relates to a painless blood collection device using a disposable needle, and more particularly, to a painless blood collection device that can easily collect blood while not feeling pain using a thin needle having a diameter of 0.2 mm or less.

In general, there are times when it is necessary to draw a small amount of blood as a blood sample in order to measure blood sugar or check blood type, or when it is necessary for oriental medicine, for example, to remove eohyeol or waste products during cupping. In this case, the patient feels fear due to the stinging pain when the needle is punctured.

Human skin is largely composed of the epidermis (about 0.2 mm), the dermis (about 2 to 3 mm) and the subcutaneous tissue. The subcutaneous tissue has arteries and veins, and the dermis has fine capillaries distributed like a network. Therefore, in order to collect blood, the needle must be inserted only up to the capillary, that is, just before the subcutaneous tissue, which causes severe pain.

In order to eliminate such pain during blood sampling, many prior art techniques have been proposed. For example, the 'pressure-actuated disposable painless blood collection device' of Korean Patent Publication No. 10-2019-0037862, the 'painless blood collection device for removing dead blood' of Korean Patent Publication No. 10-2019-0128907, and the 'disposable painless blood collection device' of Patent Publication No. 10-2018-0117241 'Blood machine' is known.

The lancet used in the prior art described above can eliminate or minimize pain as the diameter becomes smaller. However, if the needle is too thin, even if the tip of the needle reaches the capillary, the passage is closed immediately after the needle is removed, or the passage is too narrow, so the blood can easily drain out. You can't get the amount of blood you want because it can't come out. Conversely, if the diameter of the lancet is large, the blood discharge passage is enlarged to facilitate the discharge of blood, but there is a problem in that the pain when puncturing the skin with the lancet increases accordingly.

Therefore, the prior art uses a diameter of about 0.3 to 0.5 mm, and there is a limit in reducing the pain when the blood collection needle pricks the skin, and there is an urgent need for improvement.

The present invention is to solve the conventional problems as described above, and the purpose is to use a needle having a diameter of 0.2 mm or less to eliminate or minimize pain during blood collection and to ensure a desired amount of blood through smooth blood discharge. It is to provide a painless blood collection device that can be used.

In order to achieve the above object, the present invention, a blood collection body formed in a long cylindrical shape to be easily gripped by hand; a blood collection cap of a transparent material detachably coupled to the tip of the blood collection body and having a skin contacting end having a through hole in the center; a needle holder installed at the tip of the blood collection body and moving linearly between an operating position protruding from the tip toward the through hole of the blood collection cap and a standby position inserted into the tip; a blood collection needle detachably mounted on the needle holder and protruding outward through the through hole of the blood collection cap at the operating position of the needle holder to pierce the skin to a predetermined depth; an elastic member provided elastically between the blood collection body and the needle holder to provide an elastic force so that the needle holder is always in a standby position; a driving means installed on the blood collection body to move the needle holder from a standby position to an operating position; an exhaust pipe installed inside the blood collection body to communicate with the inside of the blood collection cap; a small vacuum pump installed in the exhaust pipe in the blood collection body to rigidly discharge the air inside the blood collection cap to the outside; a power supply unit provided in the blood collection body to supply power to the small vacuum pump; and a switch provided on the blood collection body to control the operation of the small vacuum pump.

In addition, in the present invention, the driving means is composed of a plunger integrally coupled to the rear end of the needle holder, and an electromagnet comprising a coil wound around the plunger, and operates by receiving power from a battery through a switch. It is characterized by a painless blood sampling device that is designed to move the holder from the standby position to the operating position.

In addition, in the present invention, the driving means is characterized in that the painless blood collection device is composed of an operating rod integrally coupled to the rear end of the needle holder and the tip of which is exposed to the outside of the blood collection body, and a presser provided at the exposed end of the operation rod.

According to the present invention having the above characteristic configuration, the skin-contacting end of the blood collection cap is brought into contact with the blood collection site, the through hole of the blood collection cap is blocked, the blood collection needle is operated to prick the skin, and then a small vacuum pump is used to the inside of the blood collection cap. By bringing the blood into a negative pressure state, blood can be forcibly aspirated and discharged smoothly through the passage formed by the puncture of the lancet. This makes it possible to obtain the desired amount of blood even with a very thin lancet with a diameter of 0.2 mm or less. It is effective in eliminating or minimizing pain.

1 is a longitudinal cross-sectional view showing a painless blood collection device according to a first embodiment of the present invention.

2A and 2B are longitudinal cross-sectional views showing the use of the painless blood collection device according to the first embodiment of the present invention.

3 is a longitudinal cross-sectional view showing a painless blood collection device according to a second embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings. 1 is a longitudinal cross-sectional view showing a painless blood collection device according to a first embodiment of the present invention. The painless blood collection device of the present invention includes a long cylindrical body 10 having a thickness and length that is easy to grip by hand.

A blood collection cap 20 made of a transparent material is detachably coupled to the tip 11 of the body blood body 10 by a coupling means such as screw coupling, and the tip portion of the body blood body 10 ( A space is formed between 11) and the blood collection cap 20, and at the center of the tip end of the blood collection cap 20, a skin contact end 21 having a through hole 22 is formed.

In addition, the needle holder 30 is installed in the center of the tip 11 of the blood body 10 , and the needle holder 30 protrudes from the tip 11 toward the through hole 22 of the blood collection cap 20 . It is designed to move in a straight line between the stand-by position inserted into the tip 11 and the tip of the needle holder 30, and the lancet 31 is detachably fitted in the center of the tip of the needle holder 30, and after using the lancet 31 for one-time use. are available for replacement.

The blood collection needle 31 protrudes from the operating position of the needle holder 30 to the outside through the through hole 22 of the blood collection cap 20 to pierce the skin to a predetermined depth, and the operating position of the needle holder 30 is the blood collection needle It is preferable to set the tip of (31) to be inserted only up to the capillaries of the skin, and the diameter of the lancet 31 is set to 0.2 mm or less so that no pain is felt or pain can be minimized during blood collection.

Between the body blood body 10 and the needle holder 30, an elastic member 32, for example, a compression coil spring is elastically installed. The elastic member 32 provides an elastic force so that the needle holder 30 is always in the standby position, and is compressed when the needle holder 30 moves to the operating position, and then the needle holder 30 is moved by the compressed elastic restoring force. It can be automatically returned to the standby position.

In addition, the blood body 10 is provided with a driving means for moving the needle holder 30 from the standby position to the operating position.

The driving means may be composed of a plunger (41) and an electromagnet (40) comprising a coil (42) wound around the plunger (41). One end of the plunger 41 is integrally coupled to the rear end of the needle holder 30, thereby supplying or blocking current to the coil 42, thereby linearly moving the plunger 41 a predetermined distance so that the needle holder 30 is waiting. It can be moved from position to working position.

The electromagnet 40 is driven by the power supply unit 60 installed in the blood body 10 and the switch 70 for supplying the power of the power supply unit 60 to the coil 42 of the electromagnet 40 . is done In this case, the power supply unit 60 may use a replaceable normal battery (battery), or may use an external power supplied through an electric wire instead of the battery.

In addition, in the body blood body 10, the

exhaust pipes

51a and 51b communicating the inside and the outside of the blood collection cap 20 are installed in the

exhaust pipes

51a and 51b in the body blood body 10, and the inside of the blood collection cap 20 is installed. A small vacuum pump 50 for discharging air to the outside is provided. The driving of the small vacuum pump 50 is made by supplying power to the power supply unit 60 by the operation of the switch 70 .

The operation of the switch 70 is performed, for example, by providing the body 10 with a board 74 on which three first to

third terminals

71 , 72 , 73 are arranged in a line, and the switch 70 . By making the terminal 70a of the switch 70 selectively contact any one of the first to

third terminals

71, 72 and 73 by a slide operation, the electromagnet 40 or the small vacuum pump 50 is operated. Or you can make them all stop working.

For example, the second terminal 72 in the center is off (off), the first terminal 71 is for driving the electromagnet, and the third terminal 73 sets the circuit for driving the small vacuum pump 50, and the switch In the OFF state in which the terminal 70a of (70) is connected to the second terminal 72, the electromagnet 40 or the small vacuum motor is selectively connected by moving toward the first terminal 71 or the third terminal 73. It can be started or stopped.

The operation of the painless blood collection device having such a configuration will be described with reference to FIGS. 2A and 2B .

As shown in Fig. 2a, in a state where the through-hole 22 of the blood collection cap 20 is blocked by holding the blood body 10 with one hand and vertically contacting the skin-contacting end 21 of the blood collection cap 20 to the blood collection site. When the switch 70 is operated to slide the terminal 70a from the second terminal 72 and connected to the first terminal 71, the power supply of the power supply unit 60 to the coil 42 of the electromagnet 40 This is supplied to operate the plunger 41, so that the needle holder 30 moves from the standby position to the operating position, and the blood collection needle 31 pierces the skin to form a blood discharge passage (a).

At this time, the elastic member 32 is in a compressed state due to the movement of the needle holder 30, and the power supplied to the coil 42 of the electromagnet 40 is previously stopped so that the needle holder 30 reaches the operating position. If set, the needle holder 30 can be directly returned to the standby position by the elastic restoring force of the elastic member 32 from the operating position. That is, after piercing the skin with the blood collection needle 31, it can be immediately removed.

Next, when the switch 70 is operated to slide the switch 70 as shown in FIG. 2b to connect the terminal 70a with the third terminal 73 , the power of the power supply unit 60 is supplied to the small vacuum pump 50 , thereby By driving the vacuum pump 50, the air inside the blood collection cap 20 is discharged to the outside through the

exhaust pipes

51a and 51b.

Due to this, the inside of the blood collection cap 20 is in a negative pressure state and performs an action of sucking blood through the discharge passage (a) formed in the skin, so that the blood can be easily discharged, and when the desired amount of blood is discharged, the switch 70 ) by bringing the terminal 70a into contact with the second terminal 72 and 'off', it is possible to stop the drive of the small vacuum pump 50 and stop the discharge of blood.

Therefore, in the present invention, even if a very narrow discharge passage (a) is formed on the skin by using a very thin needle 31 with a diameter of 0.2 mm or less, the blood can be easily discharged to obtain a desired blood volume, and the very thin needle By using (31), it is possible to exert the effect of not feeling pain during blood collection or reducing it as much as possible.

3 is a longitudinal cross-sectional view showing a painless blood collection device according to a second embodiment of the present invention. In the first embodiment, the driving means is manually configured so that the user can directly operate it. As the driving means is manually configured, in the configuration of the first embodiment, the first terminal 71 for driving an electromagnet connected to the terminal 70a of the switch 70 is excluded, and the other configuration is the same as in the first embodiment do. Accordingly, the same reference numerals are assigned to the same components, and descriptions of overlapping components and operations are omitted.

The driving means in the second embodiment includes an operating rod 41A integrally coupled to the rear end of the needle holder 30 and the end of which is exposed to the outside of the blood body 10, and the operation rod 41A. It consists of a pressing part (42A) provided at the exposed end.

Accordingly, when the user presses the pressing part 42A of the driving means, the needle holder 30 integrally coupled with the operation rod 41A moves from the standby position to the operation position, and the blood collection needle 31 pierces the skin and causes blood. The discharge passage (a) is formed, and the elastic member (32) is in a compressed state by the movement of the needle holder (30).

Then, when the pressed portion 42A is released, the needle holder 30 is immediately returned to the standby position by the elastic restoring force of the elastic member 32 from the operating position. Therefore, by pressing and releasing the pressing part (42A) once, the user pierces the skin with the blood collection needle (31) and then it can be removed immediately.

At this time, the pressing length of the pressing portion 42A may be provided with a separate stopper or set to a position where the pressing portion 42A is in contact with the blood body 10 and is no longer pressed as shown by a virtual line in FIG. 3 . can

According to the invention of the second embodiment, the same effects as those of the invention of the first embodiment can be exhibited.

The embodiments described so far are merely illustrative of preferred embodiments of the present invention, and the scope of the present invention is not limited to the described embodiments, and within the spirit and claims of the present invention, those skilled in the art can Various changes, modifications or substitutions will be possible by this, and it should be understood that such embodiments fall within the scope of the present invention.

Claims

A blood collection body formed in a long cylindrical shape to be easily gripped by hand;

a blood collection cap of a transparent material detachably coupled to the tip of the blood collection body and having a skin contacting end having a through hole in the center;

a needle holder installed at the tip of the blood collection body and moving linearly between an operating position protruding from the tip toward the through hole of the blood collection cap and a standby position inserted into the tip;

a blood collection needle detachably mounted on the needle holder and protruding outward through the through hole of the blood collection cap at the operating position of the needle holder to pierce the skin to a predetermined depth;

an elastic member provided elastically between the blood collection body and the needle holder to provide an elastic force so that the needle holder is always in a standby position;

a driving means installed on the blood collection body to move the needle holder from a standby position to an operating position;

an exhaust pipe installed inside the blood collection body to communicate with the inside of the blood collection cap;

a small vacuum pump installed in the exhaust pipe in the blood collection body to rigidly discharge the air inside the blood collection cap to the outside;

a power supply unit provided in the blood collection body to supply power to the small vacuum pump; and

and a switch provided on the blood collection body to control the operation of a small vacuum pump.
According to claim 1, wherein the driving means,

It is composed of a plunger integrally coupled to the rear end of the needle holder and an electromagnet made of a coil wound around the plunger, and operates by receiving power from a battery through a switch to move the needle holder from the standby position to the operating position. Painless blood collection device, characterized in that
According to claim 1, wherein the driving means,

A painless blood collection device, characterized in that it consists of an operating rod integrally coupled to the rear end of the needle holder, the tip of which is exposed to the outside of the blood collection body, and a pressing part provided at the exposed end of the operation rod.