WO2018008828A1

WO2018008828A1 - Needle set for injecting liquid medicine

Info

Publication number: WO2018008828A1
Application number: PCT/KR2017/002715
Authority: WO
Inventors: 송시환; 길기현; 이주영; 배진숙; 임채성
Original assignee: (주) 켐온
Priority date: 2016-07-05
Filing date: 2017-03-14
Publication date: 2018-01-11
Also published as: KR101699757B1

Abstract

The present invention relates to a needle set for injecting a liquid medicine, which is characterized by being able to inject a liquid medicine into a blood vessel by an outer needle, with just a one-time injection without having to replace an inner needle inserted into the outer needle. The present invention comprises: an outer needle of a flexible material, comprising a hollow tube body part which is connected to a container containing a liquid medicine for medical use and delivers the liquid medicine, and a tube front end part which is inserted into a blood vessel, has an invasion hole in a side, and discharges the liquid medicine through the invasion hole or a distal end; and an inner needle of a solid material, which is inserted through the invasion hole, guides the tube front end part into the blood vessel, and then is withdrawn.

Description

Needle set for chemical supply

The present invention relates to a set of needles for supplying a chemical solution, and after the cry needle and the needle are inserted together, the medicine solution can be injected into a blood vessel only by drawing out the inner needle, and the needle set for supplying the chemical liquid which can control the inserted length of the needle will be.

Typically, the majority of patients who are hospitalized due to illness or accident, etc., receive Ringer's injections for nutrition within the treatment or recovery period. Ringer's needles should be infiltrated with venous blood vessels for a long time until all of the drug solution or sap contained in Ringer's bottle is administered. Depending on the situation, a single injection of Ringer's needle may be replaced with only Ringer's disease, in which the drug is administered for 5 to 7 days.

Ringer's injection is characterized by long invasion, the needle must be fixed in the vein, and the patient's behavior must be possible. Accordingly, unlike a general one-time invasive scanning method, a resin needle is inserted into a blood vessel in a state in which a metal needle is advanced, a metal needle is taken out, and a flexible resin tube is connected to a ringer. That is, the metal needle is invaded in the blood vessel and then removed to guide the resin tube. As a result, only the flexible resin tube of the flexible material is inserted into the blood vessel to supply the ringer, thereby allowing the patient to be somewhat moved in the injected region.

In this related art, Korean Patent No. 10-0780407 discloses an infusion supply device having a reversible disposable vascular resin needle and an eyedropper. Figure 1 shows the sap supply apparatus according to the prior patent. Referring to Figure 1, the fluid supply apparatus according to the prior patent, the fluid supply line (2) for blood and fluid injection is connected to the container (1) in which the fluid or blood is embedded in the middle of the fluid supply line (2) Sap control device (3) is installed to adjust the amount of fluid supply, the fluid supply device 100 is provided including a reversible disposable vascular resin needle (10) for injecting blood or fluid into the blood vessel at the tip of the fluid supply line (2) In the structure, the reversible disposable vascular resin needle 10 has a hollow cylindrical cylinder 20 and an inner cylinder piston 30 inserted into the outer cylinder 20 to be infused with a fluid supply line. It comprises a fluid supply line 2 to form a structure receiving the blood, the convex portion 50 is provided with a dropper function in the fluid supply line.

As can be seen in the above patent, a needle for supplying a chemical solution such as Ringer is provided in a structure in which an internal needle is inserted into an external cry. Referring to Figure 1 of the prior patent, the outer cylinder 20 will be a cry, the inner cylinder piston 30 will be a needle. In this case, the conventional needle including the prior patent is injected together with the cry and the inner needle, and after removing the inner needle, a process of connecting the outer ring with the ringer tube is required. That is, when injecting the fluid supply needle to the actual patient in the prior patent of Figure 1, after separating the inner cylinder piston 30 from the outer cylinder 20, the outer cylinder 20 is connected to the fluid supply connecting portion (4) The process of doing so is essential.

From the patient's point of view, the replacement process is performed with the inserted cry not fixed. That is, the doctor or nurse invades the blood vessel together with the invasion, and then removes the invasion. At this time, the ringer tube is connected with the insulation while the insistence is fixed by pressing only one hand. The above injection process can cause considerable pain for the patient. After the internal needle is removed, if the external body moves in the process of fastening the ringer and the ringer tube, even if the flexible resin tube is called, the needle will be shaken in the blood vessel, causing considerable pain to the patient.

With the cry needle inserted in the blood vessel, requiring additional fastening with the needle or ringer tube for drug delivery presents a risk as well as a risk of damaging the patient's blood vessel. Inexperienced medical practitioners fail to stably hold the cry during the engagement of the cry with the ringer needle, and often cause an accident in which the needle of the cry perforates the blood vessel due to the pressing force during the engagement. In this case, a patient who has undergone Ringer's injection will be supplied with medicine outside the blood vessel, causing the injected body part to swell or bruise.

In addition, all of the above-described injection procedures are performed by humans, and there is a risk of infection during the withdrawal of the internal needle and replacement of the ringer needle, and since air bubbles may enter, additional hygiene may be added to patients with important hygiene. In addition, the outer ring is necessarily formed with a fastening structure having a predetermined diameter or having a protruding structure to be connected to the ringer tube. That is, as the cry cannot be composed of only one-piece thin needle and must have a fastening structure having a predetermined volume or a predetermined volume, in order to finally fix the cry connected to the ringer tube with the skin of the body, the practitioner must You need to tap several times. In addition, from the patient's point of view, the large and protruding tapered fixing part is cumbersome, there is no appearance in appearance, and there is inconvenience in that the call is caught by an external object.

In addition, the needle needle 21 of the prior patent has a structure that can not control the inserted length in the blood vessel. As in the prior patent, the conventional needle 21 has a structure in which the internal needle 20 is completely inserted inside. That is, in order to guide the flexible cry needle 21 into the blood vessel, the sharp metal needle 32 is penetrated perpendicularly to the inside of the needle needle 21 so as to be exposed to the outside of the end of the needle needle 21. The length of (21) is inevitably limited. Therefore, even after the invasion of the cry and the inner needle, the insertion length of the cry needle was impossible to adjust even if the metal inner needle was removed, thereby limiting the position of the chemical liquid supply.

As described above, the needle for supplying a conventional ringer, sap, chemical solution, etc. for a long time was necessarily accompanied by the replacement of the needle after invasion. Accordingly, the present inventors have devised a medicine supply needle that can deliver a chemical solution without a separate ringer needle and a fastening process when the internal needle is inserted into the blood vessel and the internal needle is removed.

Accordingly, the present invention is to provide a needle set for supplying a drug solution that can deliver the drug solution without the separate ringer needle and the fastening process when the needle is removed after the inner needle and the inner needle is inserted into the blood vessel. As such, the present invention seeks to provide a needle set that can easily insert a needle or catheter into a blood vessel in a non-surgical manner.

In addition, the present invention is to provide a needle set for supplying a chemical solution capable of adjusting the inserted length of the cry.

In addition, the present invention is to provide a needle set for supplying a chemical solution that can be provided at a low cost and excellent supply.

In order to achieve the above object, the present invention relates to a needle set for supplying a chemical liquid, characterized in that the crying can supply the chemical liquid into a blood vessel only by one-time injection, without a connection work with a tube for injecting the chemical liquid into the cry. A flexible material having a hollow tube body portion connected to a container carrying the medical liquid and a tube tip portion inserted into a blood vessel and having an invasion hole formed at a side thereof to eject the chemical liquid into the invasion hole or the end; Call of; And it is injected into the invasion hole and characterized in that it comprises a guide of the rigid material which is drawn out after guiding the tube tip into the blood vessel.

Preferably, the outer shell may be formed integrally with the tube body portion and the tube tip portion, the length of the tube tip portion inserted into the blood vessel with the guide of the inner needle can be adjusted.

Preferably, the invasion hole of the tube tip portion may be cut in a curved shape in which one side is cut perpendicular to the longitudinal direction of the tube tip portion and the other side is bent in the longitudinal direction of the tube tip portion.

Preferably, the invasion hole may be formed at a position spaced 0.5cm to 2.5cm from the end of the tube.

Preferably, the tube tip may be made of an elastic material.

Preferably, the internal needle includes a needle in which the distal portion is inserted into the tube tip; And a cylindrical body in which the needle is fixed, wherein the body is inserted into the invasion hole formed in the side of the tube tip, and thus the tube tip bent from the tube body is not pushed. A support bracket may be provided at a fastening part to which the needle is fixed to be pressed in a direction.

Preferably, the support bracket is in the shape of a cylindrical cylinder surrounding the proximal portion of the needle, and the end may be cut to have a gradient.

Preferably, the support bracket has a tapered shape in which the diameter decreases in the direction in which the needle is fixed, and a thread is formed on an inner surface connected to the body to enable detachment from the body.

According to the present invention, the internal needle is inserted into the side of the cry connected to the container in which the chemical liquid is loaded to guide the cry into the blood vessel. Therefore, the needle structure according to the present invention can be delivered without the separate ringer needle and fastening process when the inner needle is removed after the outer needle and the inner needle is inserted into the blood vessel. Accordingly, there is an advantage that does not require the replacement of the needle during the injection does not cause unnecessary pain to the patient, reduces the risk of blood vessel damage, and hygienically there is no fear of infection.

In addition, the present invention does not require the length limit of the tube end portion because the inner needle is inserted into the side of the outer ring, and the tube body portion and the tube end portion of the outer ring are integrally formed so that the inner needle inserted into the invasion hole is removed into the blood vessel. The length of the inserted tube tip is adjustable. Accordingly, the present invention has the advantage that can be injected to the depth of the body. In addition, since the present invention uses a needle coating material that is already used, there is no safety concern and it can be provided at a low cost, thereby providing an excellent spreadability.

1 shows a conventional sap supply device.

2 shows a needle set for supplying a chemical solution according to an embodiment of the present invention.

3 is an enlarged view of the cry and the inner needle in the needle set for supplying a chemical solution of FIG. 2.

FIG. 4 illustrates an embodiment in which the needle set for chemical solution supply of FIG. 2 is briefly implemented in order to explain the injection method of the needle set for chemical solution supply according to the embodiment of the present invention.

FIG. 5 shows a configuration of a needle set for supplying a chemical solution in FIG. 4.

Figure 6 shows the injection of the needle and the cry of the drug solution supply needle set implemented in Figure 4 in the experimental rat.

FIG. 7 illustrates a method of drawing out the needle of the needle set for supplying a chemical solution implemented in FIG. 4.

FIG. 8 shows how to confirm that the invasion of the tube tip of the outer ring is completed after the inner needle of FIG. 7 is drawn out.

FIG. 9 shows a state in which the tip of the tube is taped and fixed after the internal needle of FIG. 4 is taken out.

Hereinafter, with reference to the contents described in the accompanying drawings will be described in detail the present invention. However, the present invention is not limited or limited by the exemplary embodiments. Like reference numerals in the drawings denote members that perform substantially the same function.

The objects and effects of the present invention may be naturally understood or more apparent from the following description, and the objects and effects of the present invention are not limited only by the following description. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 shows a needle set for supplying a chemical solution according to an embodiment of the present invention. 3 is an enlarged view of the cry 60 and the inner needle 70 in the needle set for supplying the chemical solution of FIG. 2.

2 and 3, the needle set for supplying a chemical liquid includes an outer needle 60 and an inner needle 70. The cry 60 is connected to the container 1 carrying the medical liquid. The container 1 may contain a medicine solution that requires long-term administration for the treatment of patients, such as fluid or blood.

The cry 60 may include a tube body 601 and a tube tip 603. The call 60 may be provided in a flexible material. The cry 60 is flexible and the tube tip 603 is preferably made of a medical material harmless to invasion. As shown in FIG. 1, it can be seen that the tube tip 603, which is the needle portion of the needle inserted into the blood vessel, is provided in a form directly connected to the medicine supply bottle 1 as shown in FIG.

The tube body 601 may be understood as a hollow chemical liquid supply line through which the chemical liquid is delivered. The tube body portion 601 may be provided with a chemical liquid control device (3) for controlling the rate at which the chemical liquid flows in.

Tube tip 603 may be understood as a Ringer needle that invades into a blood vessel. In the present specification, the tube tip 603 is inserted into a blood vessel, but there is no limitation in length due to the characteristics of the present invention, and instead of the expression of needles or needles to emphasize a feature integrated with the tube to which the chemical is supplied, the tube tip 603 is named. It became.

The tube tip 603 may be made of an elastic material. In this embodiment, the tube front end portion 603 may be provided in a form that can be separated from the tube body portion 601. When the tube tip 603 is detachable from the tube body 601, the tube body 601 may be reused. However, separation or coupling of the tube tip 603 is performed before the procedure of the cry 60, and the tube tip 603 is coupled to the tube body 601 while the tube tip 603 is inserted into the blood vessel. Note that they are not separate.

An invasion hole 6031 is formed at the side of the tube tip 603 to eject the chemical liquid into the invasion hole 6031 or the terminal 6033. In this embodiment, it is noted that the tube tip 603 is a structure in which the inner needle 70 can be inserted from the side rather than the inner needle 70 in the longitudinal direction. That is, the conventional cry 60 has a structure in which the internal needle is inserted in the longitudinal direction. Therefore, the conventional needle structure is impossible to be injected in the state connected to the medicine liquid supply bottle 1 when stuck in the blood vessel. On the other hand, in the present embodiment, the inner tip 70 is inserted and guided from the outside of the tube tip 603 so that the tube tip 603 can be scanned in a state connected to the tube body 601 in the longitudinal direction. For this reason, after the cry 60 according to the present embodiment is inserted together with the internal needle 70, only the internal needle 70 of the side is removed, and a connection with a separate ringer needle is not required. Supply is possible.

At this time, the position of the invasion hole 6031 in which the inner needle 70 is inserted in the tube tip 603 is very important. As described above, the tube tip 603 is a needle portion inserted into the blood vessel. Eventually, the drug will be discharged to the distal end 6033 of the tube tip 603, which can control the insertion of the inner needle 70 according to the position of the invasion hole 6033, which is another hole into which the inner needle 70 is inserted. Because it can prevent the leakage of.

In the present embodiment, the tube tip portion 603 may be formed with an invasion hole 6031 at a position spaced 0.5 cm to 2.5 cm from the end (6033). When the invasion hole 6031 is formed within 0.3 cm from the distal end 6033, the region of the tube tip 603 guided by the inner needle 70 is too small, making the procedure difficult. When the invasion hole 6031 is formed at a distance exceeding 2.5cm from the distal end 6033, the invasion hole 6031 is not inserted into the blood vessel so that the invasion hole 6031 may be exposed to the outside and leak the chemical solution to prevent it. Pushing 70) deep into the vessel may damage the vessel.

Therefore, the invasion hole 6031 is preferably formed at a position spaced 0.5 cm to 2.5 cm from the end (6033). When the invasion hole 6031 is formed as described above, the inner needle 70 smoothly guides the tube tip 603 to invade into the blood vessel, and has an additional advantage of smooth supply of the chemical solution. The invasion hole 6031 formed in the range of 0.5 cm to 2.5 cm from the end 6033 is inserted into the blood vessel and is not exposed to the outside. Therefore, the discharge port through which the chemical liquid can flow out into the blood vessel has two positions, the terminal 6033 and the invasion hole 6031. In the case where the outlet 6033 is one end of the ringer needle, there is a problem in that the supply of the chemical liquid is sometimes not made smoothly when the end 6033 is opposed to the blood vessel wall or blocked by a blood clot. In this embodiment, the chemical liquid can be more smoothly discharged because the outlet where the chemical liquid is discharged is two groups to the terminal 6033 and the invasion hole 6031.

The invasion hole 6031 may be formed in the shape of a nail which is cut in a curve in which one side is cut perpendicular to the longitudinal direction of the tube tip portion 603 and the other side is bent in the longitudinal direction of the tube tip portion 603. The bent direction of the invasion hole 6031 may be in the direction of the distal end 6033, or may be in the direction of the tube body 601. However, the curved direction of the invasion hole 6031 corresponds to the shape of the support bracket 7031 which will be described later.

In the nail-shaped invasion hole 6031, the length of the vertically cut end and the other end of the curved curve may be 0.2 mm to 5 mm depending on the thickness of the inner needle. In addition, the width of the invasion hole 6031 may be 0.2mm to 5mm depending on the thickness of the inner needle.

The outer needle 60 may be formed integrally with the tube body portion 601 and the tube tip portion 603, and the length of the tube tip portion 603 inserted into the blood vessel by the guide of the inner needle 70 may be adjusted. In the present embodiment, the tube body portion 601 and the tube tip portion 603 is expressed in one piece, the ringer string and ringer needle for supplying a chemical solution is provided as a separate configuration without the need for fastening work is provided as a set To illustrate that it can be. The tube tip 603 according to the present embodiment is provided with the tube body 601 connected in the longitudinal direction, and the length of the tube tip 603 is the length of the inner needle 70 because the inner needle 70 is inserted into the side. Note that you are not bound to. That is, the tube tip 603 may be invaded into the blood vessel by the guide of the inner needle 70, and the entirety of the tube tip 603 may be inserted into the blood vessel by drawing out the inner needle 70. In other words, the tube tip portion 603 can adjust the degree of insertion of the tube tip portion 603 as long as the invasion hole 6031 is not exposed. This is because the tube tip 603 and the inner needle 70 are coupled so that no structural features other than the invasion hole 6031 are required. That is, the tube tip 603 can be inserted into the blood vessel as a whole because the tube tip 603 can be guided by the internal needle 70 only by forming the invasion hole 6031 without any fastening structure.

Although not shown in FIGS. 1 to 4, the tube tip portion 603 may have a display line 6032 to 1.5 cm above the invasion hole 6031 in the distal direction to confirm whether the invasion hole 6031 is inserted into the blood vessel. 7) may be formed. More preferably, the display line 6032 may be displayed in color 1 cm outside the invasion hole 6031.

The internal needle 70 may be understood as a needle of a rigid material that guides the external needle 60 into a blood vessel. The inner needle 70 is injected into the invasion hole 6031 and guided through the tube tip 603 into the blood vessel and then drawn out.

The internal needle 70 may include a needle 701 and a body 703. Although not shown in the drawing, the internal needle 70 may check that the body 703 is inserted into a blood vessel, and may include a medical cotton with strong hygroscopicity so that blood is not pushed out of the body 703 and connected with a syringe. It may be.

The needle 701 is made of a metal material, and an end portion thereof is cut diagonally to facilitate skin invasion. The distal portion at which the end of the needle 701 is formed is inserted into the tube tip 603.

The body 703 may be provided in a cylindrical shape for fixing the needle 701, but is not limited thereto. The body 703 will be able to modify the design of the shape to the extent that the medical practitioner is easy to grip and invade.

As the needle 701 is injected into the invasion hole 6031 formed on the side of the tube tip portion 603, the body 703 presses the tube tip portion 603 bent from the tube body portion 601 without being pushed in the blood vessel direction. A support bracket 7031 may be provided at a fastening part to which the needle 701 is fixed so that the needle 701 may be fixed.

The supporting bracket 7031 is in the shape of a cylindrical cylinder surrounding the proximal portion of the needle 701, and the end is cut to have a gradient. In the present specification, the portion where the needle 701 is connected to the body 703 is represented by the proximal portion, and the portion exposed from the support bracket 7031 is represented by the distal portion.

As described above, the tube tip 603 is provided so as not to have any fastening means with the inner needle 70 in addition to the invasion hole 6031. That is, since the tube tip 603 that requires the guiding is merely a hole, the tube tip 603 from the end 6033 to the invasion hole 6031 is inserted when the needle 701 is inserted into the tube tip 603. A configuration that can pressurize into the vessel is required for the internal needle 70. Accordingly, it is preferable that the support bracket 7031 has a form in which the end portion is cut to be gradient so as to correspond to the shape of the invasion hole 6031.

The support bracket 7031 may be provided in a tapered shape in which the diameter decreases in the direction in which the needle 701 is fixed, and a thread is formed on an inner surface connected to the body 703 to be detached from the body 703. .

FIG. 4 illustrates an embodiment in which the needle set for chemical solution supply of FIG. 2 is briefly implemented in order to explain the injection method of the needle set for chemical solution supply according to the embodiment of the present invention. FIG. 5 shows a configuration of a needle set for supplying a chemical solution in FIG. 4.

4 and 5, the outer ring 60 used a chemical supply tube as an embodiment in which the tube tip 603 and the tube body 601 were integrated. The cry 60 is directly connected to the chemical liquid supply bottle 1. In this example, the bottle 1 on which the chemical solution was loaded was replaced with a syringe. As in this embodiment, the bottle 1 does not necessarily refer only to the form of the Ringer bottle 1 shown in FIG. 2, and may mean a member capable of carrying a drug solution for administration to a patient.

As shown in FIG. 4, the inner needle 70 penetrates through the invasion hole 6031 formed at the side of the tube tip 603 to expose a sharp end portion. Note that the inner needle 70 is not inserted vertically into the outer needle 60, but is coupled to the side. The embodiment of FIG. 4 briefly implements the internal needle 70 to explain the scanning method, and the supporting bracket 7031 is not coupled. 6 to 9, the injection process of inserting an experimental rat for drug administration into the case 9, inserting the cry 60 and the internal needle 70, and extracting the internal needle 70, and then fixing the cry 60 is performed. Shows.

FIG. 6 shows the injection of the needle 60 and the needle 70 of the needle set for supplying the chemical solution in FIG. 4 into an experimental rat. The needle was inserted into the tail of the experimental rat, it can be seen in Figure 6 (b) that the needle 7 is injected into the tail with the guide 60 to guide the cry (60). In this embodiment, the support bracket 7031 is not implemented, and the needle is pressed by pressing the invasion hole 6031 with the index finger.

FIG. 7 shows a state in which the inner needle 70 of the needle set for chemical liquid supply implemented in FIG. 4 is drawn out. FIG. 7A illustrates a state in which the internal needle 70 is extracted from the external call 60, and FIG. 7B illustrates a state in which the insertion length of the external call 60 is adjusted after the internal needle 70 is withdrawn. As shown in FIG. 7B, a display line 6032 may be formed at the tip 603 of the tube 60 to confirm that the invasion hole 6031 is inserted into the blood vessel. As can be seen in Figure 7, the tube tip 603 and the tube body 605 is not a separate fastening structure, so that the length of the call 60 is inserted can be adjusted.

FIG. 8 shows a state where the tube tip 603 of the outer needle 60 confirms that the invasion is completed in the blood vessel after the inner needle 70 of FIG. 7 is drawn out. The operator checks that blood flows into the tube as the cry 60 is invaded into the blood vessel correctly.

9 shows the shape of taping and fixing the tube tip portion 603 after withdrawing the inner needle 70 of FIG. According to this embodiment, a fastening structure that protrudes from the tube of the outer ring 60 or needs to be expanded in diameter is not required. Therefore, the operator can easily fix the call 60 without the need for excessive taping, and there is no great aesthetic appearance from the patient's point of view, and the call 60 does not easily escape even if it rubs against or touches an external object.

4 to 9, the needle according to the embodiment of the present invention is different from the conventional injection method of the medicine supply needle, and after the withdrawal of the inserted internal needle 70, the external call 60 is separately. No need to fasten to the needle or tube. Therefore, the needle set for supplying the medicine solution according to the embodiment of the present invention does not require the replacement of the needle during injection, which does not cause unnecessary pain to the patient, reduces the risk of vascular damage, and does not have the concern of infection in hygiene. . In addition, since the fastening portion of the structure protruding from the tube of the outer ring 60 is not required, the taping and fixing operation is easy, and the fixed state can be stably maintained even after being fixed for a long time.

Although the present invention has been described in detail through the representative embodiments above, it will be understood by those skilled in the art that various modifications can be made without departing from the scope of the present invention with respect to the above-described embodiments. will be. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be defined by all changes or modifications derived from the claims and the equivalent concepts as well as the following claims.

[Description of the code]

1: container 3: chemical regulator

60: call 601: tube body portion

603: tube tip 6031: invasion hole

6032: display line 6033: terminal

70: needle 701: needle

703: body 7031: support bracket

Claims

A flexible tube having a hollow tube body part connected to a container carrying a medical liquid and a tube tip part inserted into a blood vessel and having an invasion hole formed at a side thereof to eject the chemical liquid into the invasion hole or the end thereof. shout; And

Including a piercing of the rigid material which is injected into the invasion hole and guided to the tube tip into the blood vessel and drawn out,

The needle set for supplying a medicine solution, characterized in that the cry can supply the medicine solution into the blood vessel only by one-time injection without replacing the internal needle injected into the cry.
The method of claim 1,

The call,

The tube body portion and the tube tip portion integrally formed, the needle set for supplying a chemical solution, characterized in that the length of the tube tip inserted into the vessel by the guide of the inner needle can be adjusted.
The method of claim 1,

Invasion hole of the tip of the tube,

One side is cut perpendicular to the longitudinal direction of the tube end portion and the other side is cut in a curve bent in the longitudinal direction of the tube end portion, the needle set for chemical liquid supply, characterized in that formed in the shape of a nail.
The method of claim 1,

The tube tip portion,

The needle set for supplying a chemical solution, characterized in that the infiltration hole is formed at a position spaced 0.5 cm to 2.5 cm from the end.
The method of claim 1,

The needle tip for supplying a chemical solution, characterized in that the end of the tube made of an elastic material.
The method of claim 1,

The tip is,

A needle in which a distal portion is inserted into the tube tip; And

It includes a cylindrical body to which the needle is fixed,

The body,

As the needle is injected into the invasion hole formed at the side of the tube tip, a support bracket is provided on the fastening part to which the needle is fixed so that the tube tip bent from the tube body portion can be pressed in the blood vessel direction without being pushed. Needle set for chemical liquid supply, characterized in that.
The method of claim 6,

The support bracket,

A needle set for supplying a chemical solution, characterized in that a cylindrical cylinder is formed around the proximal portion of the needle, and the end portion is cut to have a gradient.
The method of claim 7, wherein

The support bracket,

Tapered shape is reduced in diameter in the direction in which the needle is fixed,

A needle set for supplying a chemical liquid, characterized in that a screw thread is formed on an inner side surface connected to the body, and is detachable from the body.