KR200459536Y1 - Double needle for viscometer - Google Patents

Abstract

The double needle is used in the conveying device for supplying the sample liquid to the viscosity measuring device, and has a long inner hollow needle, an outer needle having a relatively shorter length than the inner needle and receiving the inner needle, and both needles It includes a fixing body for fixing the. The outer needle and the inner needle are formed hollow, between which a flow path for the pressure gas is formed. In addition, a flow path connecting the inner needle and an external viscosity measuring device by a fixed body and a flow path connecting the pressure gas source and the flow path for the pressure gas may be provided independently.

Viscosity measurement, needle

Description

Double needle for viscosity measuring device {DOUBLE NEEDLE FOR VISCOMETER}

The present invention relates to a component for a viscosity measuring device, and more particularly, to a double needle for quantitative extraction of a small amount of sample liquid in a storage container storing a sample liquid, such as circulating blood.

In recent years, a blood viscosity measuring device allows blood obtained from a body to pass through a flow restrictor tube, and measures blood viscosity and blood cell aggregation rate by measuring blood flow characteristics in the flow resistance tube. .

Korean Patent No. 747605 discloses a viscosity measuring device using a double vertical tube / single capillary tube. The viscosity measuring device monitors the height change of the two opposing-flowing blood columns from the circulating blood of the patient, and the capillary tube of certain dimensions through which the blood flow measures the blood viscosity over a range of shear forces, especially low shear forces. The system includes a pair of upright tubes, a capillary tube connected between the upright tubes, and a valve device for controlling the circulating blood flow from the patient to the upright tube, wherein a separate sensor is provided for each of the upright tubes. The flow of blood pillars in the tube is monitored and the microprocessor analyzes the blood flow in the capillary.

Thus, in order to supply blood for measuring blood viscosity, a needle or a tube may be inserted directly into a body blood vessel, and blood may be stored in a separate storage container and transferred to a viscosity measuring device. Vacuum can also be used to artificially transfer blood, or to pressurize air or other fluids to a specific pressure to transfer blood. Korean Patent Publication No. 2003-8223 (published Jan. 24, 2003) may be referred to a method of transferring blood using a vacuum.

1 is a view for explaining a blood transfer device for transferring blood using conventional air.

Referring to FIG. 1, a conventional blood transfer device supplies blood through a manual operation, and passes through a storage container 20 in which a silicon packing 25 is formed and a silicon packing 25 in a storage container 20. Blood needle 30 extending to blood B, air needle 40 whose end is higher than blood B in storage container 20 through the same silicone packing 25, and air needle 40 A syringe 50 for supplying air to the storage container 20 through the).

The user injects air slowly using the syringe 50, and the injected air A forms a high pressure on the blood B through the air needle 40, and the blood B The blood needle 30 may be supplied to the blood viscosity measuring device 60.

However, it is difficult for the user to supply blood at a constant pressure and a constant flow rate because the user must operate the syringe 50 only by manual operation. In addition, it is cumbersome to install the blood needle 30 and the air needle 40 separately and adjust the height, and it is difficult to automate the blood transfer device for blood viscosity measurement, especially since two independent needles are used. The disadvantage is that it is difficult.

The present invention is easy to install and detach the needle, and provides a needle for the blood viscosity measuring device that can be mounted and detached in one operation.

The present invention provides a needle with a structure specifically designed for automating a blood viscosity measuring device.

According to one exemplary embodiment of the present invention, the double needle is used in a conveying device for supplying a sample liquid to a viscosity measuring device, and is temporarily fixed to a storage container in which the sample liquid is stored, and receives a pressure gas supplied from the outside. The sample liquid can be supplied to an external viscosity measuring device. To this end, the double needle includes an elongated hollow inner needle, a relatively shorter length than the inner needle, and an outer needle accommodating the inner needle, and a fixing body for fixing both needles.

The outer needle and the inner needle are formed hollow, between which a flow path for the pressure gas is formed. In addition, a flow path connecting the inner needle and an external viscosity measuring device by a fixed body and a flow path connecting the pressure gas source and the flow path for the pressure gas may be provided independently.

Therefore, the outer needle and the inner needle can be mounted together with only one hole in the silicon packing of the storage container, and a pressure gas such as air can be supplied to the flow path for the pressure gas, and the end of the inner needle is contained in the sample liquid. The sample liquid can then be transferred to an external viscosity measuring device.

A hole may be formed in the cover of the storage container in advance, but if the cover is permeable, such as silicone packing, the ends of the inner needle and the outer needle may be cut in an inclined direction, and the pointed ends may be used to directly penetrate and insert the cover. .

Since the dual needle of the present invention has an outer needle and an inner needle almost on the same axis, both needles can be simultaneously mounted and detached with a single insertion. In particular, two needles, as conventionally separated, are not suitable in an automated device that requires the needle to be inserted and removed automatically. However, since the outer needle and the inner needle are on the same axis as in the present invention, it is possible to stably insert and detach the needle into a cover such as a silicone packing without any misalignment or bending of the needle even in an automated device.

In addition, since only one integrated dual needle needs to be replaced, it is easy to replace parts and easy to manage.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited or limited by the embodiments. For reference, in the present description, the same numbers refer to substantially the same elements, and may be described by quoting contents described in other drawings under such a rule, and the contents repeated or deemed apparent to those skilled in the art may be omitted.

2 is a front view of a double needle according to an embodiment of the present invention, Figure 3 is a partial cross-sectional view for explaining the use of the double needle of FIG.

2 and 3, the dual needle 100 for the viscosity measuring device includes an inner needle 110, an outer needle 120, and a fixed body 130. The inner needle 110 has an end which is cut in an inclined direction to penetrate into soft tissue, and the outer needle 120 is also formed with a larger diameter than the inner needle 110 and has an end that is cut in an inclined direction. The sharpened end of the outer needle 120 is located inward of the tip of the inner needle 110, and optionally it is possible to contain only the end of the inner needle 110 at the end of the sample liquid.

For reference, although the sample liquid is used as blood in this embodiment, it is possible to use other liquids, and various gases not limited to air and not directly reacting with the sample liquid may be used as the pressure gas.

The fixed body 130 may be generally formed through plastic injection, and the outer needle 120 or the inner needle 110 may be formed by insert injection from the time of manufacture, or may be fixed later. .

The fixing body 130 primarily fixes the ends of the inner needle 110 and the outer needle 120. In addition, the needles are fixed while providing independent flow paths. For example, a flow path I for connecting the inner needle 110 and the external viscosity measuring device is formed in the fixed body 130, and the external needle 120 and the external pressure are separated from the flow path I. A flow path II for connecting the gas source is formed. The two flow paths I and II do not mix with each other, one introduces an external pressure gas into the storage container 20, and the other discharges the sample liquid B out of the storage container 20.

A flow path III for supplying pressure gas is formed between the outer needle 120 and the inner needle 110, and the pressure gas supplied from the pressure gas source may be provided through the flow path III.

4 is a front view of the double needle according to an embodiment of the present invention, Figure 5 is an exploded view of the double needle of Figure 4, Figure 6 is a front view for explaining the use of the double needle of Figure 4, Figure 7 is Figure 6 It is a front view for demonstrating the state which moved the container conveyance part in the blood transfer apparatus.

4 to 7, the blood transfer device 200 for the viscosity measuring device includes a pressure gas source 220, a double needle 300, a blood storage container 230, a container transfer unit 240, Double needle 300 is connected to the viscosity measuring device (250).

The pressure gas source 220 supplies a pressure gas such as air, and may supply air at a constant pressure, a constant flow rate, or a constant pressure / flow rate. The pressure gas source 220 may be a manually operated syringe as in the prior art, may be a pneumatic pump, or another device capable of injecting a minute amount of air at a uniform pressure.

The pressure gas supplied through the hose is provided to the pressure gas inlet 334 of the double needle 300, and may be introduced into the blood reservoir 230 through the flow path II supplied into the fixed body 330. have.

As the air is introduced, the blood inside may be discharged to the outside through the inner needle 310, and the blood rising through the inner needle 310 may be measured along the other flow path I in the fixing body 330. 250).

Referring again to the drawings, the double needle 300 includes an inner needle 310, an outer needle 320 and a fixing body 330, the fixing body 330 is an intermediate portion 332, the inner needle fixing portion ( 336 and outer needle fixture 338. The intermediate portion 332 forms a T-shaped connected passage. When a passage connected in a straight line in the T-shaped passage is vertically disposed, an inner needle fixing portion 336 is mounted at the upper end of the passage, and an outer needle fixing portion 338 is mounted at the lower end thereof. The inner needle fixing part 336 is integrally formed by the inner needle 310 and the insert injection, etc., and the flow path I by the inner needle 310 is separated from the flow path provided by the intermediate part 332. The outer needle fixing part 338 is fixed to the lower end of the middle part 332, and the inner needle 310 passes through the outer needle 320.

A flow path (III) for discharging pressure gas is formed between the outer needle 320 and the inner needle 310, and the injection hole 334 formed at the side and the discharge hole formed at the lower portion of the intermediate part 332 are the pressure gas supply source 220. And a flow path (II) communicating with the inside of the storage container (230).

The inner needle fixing part 336 may be fixed through interference fitting or hook coupling at the upper end of the middle part 332, and the outer needle fixing part 338 is fixed by screwing at the lower part of the middle part 332. Can be.

6 and 7, the blood storage container 230 stores blood in a vacuum state and is fixed to the container transfer part 240. Although not shown, the blood storage container 230 may be stored at a temperature of approximately 36.5 ~ 37 ℃, for this purpose, the container transfer unit 240 may include a heating device and a temperature sensor. In addition, the container transfer unit 240 may move vertically up and down with the fixed blood storage container 230, and as shown in Figure 7, the blood storage container 230 is raised upward while the fixed double needle (300) Needles may be inserted into the blood reservoir 230 through the silicon packing.

At this time, the container transfer unit 240 may sense an appropriate position of the inner needle 310 in the blood reservoir 230, the inner needle 310 is immersed in the blood, the outer needle 320 is exposed to the blood The storage container 230 may be transferred.

In order to easily control the position of the double needle 300, a mark 312 (see 312 dotted line in FIG. 4) may be formed on the outer surface of the inner needle 310 or the outer needle 320 to indicate a proper position. . The container transfer unit 240 may further raise or lower the blood storage container 230 according to the display 312, and adjust the height of the container according to the depth even while blood is supplied.

In this case, since the double needle 300 is located on the same axis, the needles are not bent or bent even while the blood reservoir 230 is raised, and the process of inserting and removing the needles is very simple.

As described above, the present invention has been described with reference to a preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the present invention described in the claims below I can understand that you can.

1 is a view for explaining a blood transfer device for transferring blood using conventional air.

2 is a front view of a double needle according to an embodiment of the present invention.

FIG. 3 is a partial cross-sectional view illustrating a use example of the double needle of FIG. 2.

4 is a front view of a double needle according to an embodiment of the present invention.

5 is an exploded view of the double needle of FIG.

FIG. 6 is a front view illustrating a double needle use example of FIG. 4.

FIG. 7 is a front view illustrating a state in which the container transfer unit is moved in the blood transfer device of FIG. 6.

<Description of the symbols for the main parts of the drawings>

100,300 ： Double needle 110,310 ： Internal needle

120,320: External needle 130,330: Fixed body

332 ： middle part 336 ： internal needle fixing part

338: Internal needle fixing part

Claims (5)

A double needle for temporarily supplying a sample liquid to a storage vessel in which a sample liquid is stored, and for supplying the sample liquid to an external viscosity measuring device using a pressure gas supplied from the outside, A hollow inner needle extending long to penetrate the cover of the storage container; An outer needle accommodating the inner needle to form a flow path for the inner needle and the pressure gas, and penetrating through the cover of the storage container with the inner needle to position an end portion into the storage container; And And a fixed body configured to independently provide a flow path connecting the inner needle and the external viscosity measuring device and a flow path for connecting the pressure gas source and a flow path for the pressure gas, and to fix the inner needle and the outer needle. , And using the pressure gas introduced into the storage vessel through the end of the outer needle, to transfer the sample liquid to the external viscosity measuring device through the inner needle. The method of claim 1, And the ends of the inner needle and the outer needle are cut in an oblique direction. The method of claim 1, The fixing body is connected to the intermediate portion forming the T-shaped flow path, the inner needle fixing portion is fixed to one end of the intermediate portion so that the inner needle is located through the intermediate portion, and the outer needle An outer needle fixing portion connected in communication with an end and fixed to the other end of the intermediate portion opposite the inner needle fixing portion, The outer needle holding portion is fixed to the other end of the middle portion and the outer needle receives the inner needle, and pressure gas is supplied to the flow path for the pressure gas formed between the outer needle and the inner needle through the other end of the middle portion. Double needle, characterized in that. The method of claim 3, And the other end of the intermediate portion and the outer needle fixing portion are mutually coupled by screwing. The method of claim 1, Double needle, characterized in that the inner needle or the outer needle is formed with an indicator for adjusting the insertion depth into the storage container.

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