WO2012121504A2

WO2012121504A2 - Apparatus for injecting medicines

Info

Publication number: WO2012121504A2
Application number: PCT/KR2012/001508
Authority: WO
Inventors: 박광범; 양창희
Original assignee: 주식회사 메가젠임플란트
Priority date: 2011-03-10
Filing date: 2012-02-28
Publication date: 2012-09-13
Also published as: KR101121082B1; WO2012121504A3

Abstract

The present invention relates to an apparatus for injecting medicines. The apparatus for injecting medicines includes: a pressure generation part for generating a pressure for injecting an injectable solution; a tube connected to an outlet of the pressure generation part; a pressing member connected to an end of the tube; a cartridge case in which a cartridge filled with the injectable solution is inserted, the cartridge case being connected to an end of the pressing member; and an injection part detachably connected to an end of the cartridge case, the injection part including a needle inserted into an afflicted area.

Description

Drug injection device

The present invention relates to a drug injection device.

Anesthesia is one of the most painful complaints in dental practice. In order to reduce pain during dental treatment, anesthesia is injected by anesthesia into the area to be treated. This is the most painful and fearful moment for the patient.

In particular, in the case of an implant procedure, local anesthesia is performed before dissecting the gum of the site to be treated. Such anesthesia is to inject anesthesia into the treatment site using a syringe. In general, when anesthesia is injected at a high rate, an anesthesia injection amount per unit time increases the pressure on the affected part, causing the patient to feel pain.

Therefore, when injecting anesthesia solution, it should be injected at an appropriate infusion rate, and should be injected at a slow speed as much as possible to minimize the pain felt by the patient. However, if the surgeon injects anesthesia at a very slow infusion rate, the infusion time will be longer. This means that the time for which the patient should open the mouth is long, and as a result, the patient has to bear the pain caused by the length of the procedure.

In addition, when the surgeon directly injects the piston of the syringe by hand, the pain may be felt at the point where the needle is inserted due to the shaking of the surgeon.

Many attempts have been made to solve this problem, and an automatic anesthesia device as disclosed in Korean Patent No. 10-0784931 has been developed as a representative example.

According to the automatic anesthesia device, it is disclosed that an injection rate of anesthesia liquid is appropriately adjusted according to a change in pressure formed at a site to be treated, thereby minimizing pain felt by a patient.

In addition, a medical injection liquid injector as disclosed in Korean Patent Registration No. 10-0589007 has been developed.

However, the drug injection device forming the above structure has a disadvantage that the structure of the drug injection device is complicated and heavy, which is difficult because the surgeon is holding it for a long time, and that additional pain due to hand shaking may occur during the drug injection process. have.

Specifically, in the case of the registered patents, since the motor must be mounted inside the injection device that the surgeon must hold by hand, the weight of the injection device is inevitably increased.

The present invention has been proposed to improve the above disadvantages, to reduce the pain of the patient by allowing the drug to be injected in a quantitative, and at the same time drug injection that can minimize the load on the body of the injection device gripping the hand by the practitioner It is an object to provide a device.

In addition, it is an object of the present invention to provide a drug injection device capable of maximizing the effect of quantitative injection of the drug by applying a hydraulic method as a means for generating a pressure for drug injection.

Drug injection device according to an embodiment of the present invention for achieving the above object, the pressure generating unit for generating a pressure for injection injection; A tube connected to the discharge end of the pressure generator; A pressing member connected to the end of the tube; A cartridge case connected to an end of the pressing member and into which a cartridge filled with an injection liquid is inserted; And an injection part detachably connected to an end portion of the cartridge case and having a needle penetrating the affected part.

According to the drug injection device according to an embodiment of the present invention constituting the configuration as described above has the following effects and advantages.

First, there is an advantage that the load is lightened by removing the motor to the injection device body part, that is, the injection needle is connected and the part that the surgeon should hold by hand. Therefore, even if the surgeon holds the injection device until all of the drugs are injected, there is an advantage of minimizing hand shaking due to the load.

Second, since a fluid such as water is applied as a medium for generating a pressure to push out the drug, the injection pressure can be subdivided into a smaller amount compared to a method using a gear or rack / pinion structure. Therefore, since the drug injection pressure can be finely adjusted, there is an advantage of minimizing the pain felt by the patient.

Third, there is an additional advantage that can be replaced by the hydraulic pump provided in the existing dental chair portion generating the hydraulic pressure.

1 is a perspective view showing a drug injection device according to an embodiment of the present invention.

2 is an exploded perspective view of the drug injection device.

3 is a cross-sectional view of the drug injection device.

Figure 4 is a cross-sectional view showing the operation of the drug injection device according to an embodiment of the present invention.

5 is a cross-sectional view schematically showing an actuator according to another embodiment of the present invention.

Hereinafter, a drug injection device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the embodiments set forth below, but is merely one exemplary embodiment for implementing the spirit of the present invention, and those skilled in the art will have equivalent scope therefrom. Various modifications and design changes will be possible within the scope. Therefore, it should be understood that the protection scope of the present invention should be defined only by the appended claims.

1 is a perspective view showing a drug injection device according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the drug injection device, Figure 3 is a cross-sectional view of the drug injection device.

1 to 3, the drug injection device 10 according to the embodiment of the present invention includes a main body 11 provided with a pressure generating means and a control panel, and a tube 13 extending from the pressure generating means. And a pressurizing member 14 connected to the end of the tube 13, a cartridge 16 pressurized by the pressurizing member 14, a cartridge filled with a drug, and a cartridge case to which the cartridge 16 is mounted. 15) and an injection unit 17 connected to the end of the cartridge case 15.

In detail, the pressure generating means includes a pumping member 12 and an actuator 18 connected to the pumping member 12 to generate a driving force. In more detail, the pumping member 12 includes a pump case 121 and a pumping fluid 122 filled in the pump case 121. In addition, a connection port 123 protrudes from an outlet end of the pump case 121 to be fitted to one end of the tube 13. In order to prevent the end of the tube 13 from being separated from the connecting port 123 and preventing the pumping fluid 122 from scattering or leaking, one end outer peripheral surface of the tube 13 into which the connecting port 123 is inserted Tightening devices including clamping members (not shown) can be enclosed.

In addition, a fastening rib 124 protrudes from the inlet end of the pump case 121 in the radial direction of the pump case 121, and the inlet end of the pump case 121 is fitted into the main body 11. A rib groove 115 into which the fastening hole 114 and the fastening rib 124 are fitted may be formed. By such a structure, when the fastening rib 124 is inserted into the rib groove 115, when the pump case 121 is turned clockwise or counterclockwise, the pump case 121 is the main body. It can be firmly coupled to (11). That is, the pumping member 12 may be detachably connected to the main body 11. To this end, a separate sealing member (not shown) is inserted into the inlet end of the pump case 121 to prevent the leakage of the pumping fluid 122. In addition, the sealing member needs to be provided to be movable in close contact with the inner circumferential surface of the pump case 121 by the operation of the actuator 18. As an example, a sealing member may be surrounded by an outer circumferential surface of the end portion of the actuator 18 moving in close contact with the inner circumferential surface of the pump case 121 so that the end portion of the actuator 18 serves as a piston. Do.

Alternatively, the actuator 18 and the pumping member 12 may be provided in one module form.

On the other hand, the actuator 18 may be applied to the solenoid method. That is, the pump case 121 may include a plunger 181 movable inside, a coil 183 causing a linear reciprocating motion of the plunger 181, and a case 182 surrounding the coil 183. . The plunger 181 is inserted into the center of the coil 183 to move forward or backward in the direction of the current flowing through the coil 183. In addition, the moving speed of the plunger 181 is adjusted according to the amount of current supplied to the coil 183, and the magnitude of the pressure generated by the pumping member 12 is adjusted according to the moving speed of the plunger 181. . The sealing member may be surrounded by an outer circumferential surface of the plunger 181.

In addition, the pressing member 14 is connected to the other end of the tube 13.

In detail, the pressing member 14 includes a cylinder 141 and a push rod 142 moving inside the cylinder 141. The push rod 142 is advanced or retracted by the pressure of the pumping fluid 122 moving along the tube 13. The sealing member may be surrounded by an outer circumferential surface of the push rod 142 in close contact with the inner circumferential surface of the cylinder 141 to prevent the pumping fluid 122 from leaking. In addition, the connection port 144 having the same shape as the connection port 123 protrudes and is inserted into the other end of the tube 13 at the inlet end of the cylinder 141. Of course, the clamping member may be surrounded on the outer peripheral surface of the end of the tube 13 to which the connection port 144 is inserted.

In addition, the stopper 143 may protrude from the inner circumferential surface of the cylinder 141 to approach the other end thereof to limit the movement of the push rod 142. In addition, the flange 145 may extend in the radial direction at the other end of the cylinder 141, that is, the opposite end of the end where the connection port 144 is formed. In addition, the flange 145 may be bent in a "c" shape as shown and a groove is formed therein, such that the inlet end of the housing 151 of the cartridge case 15 to be described later may be connected.

On the other hand, the cartridge case 15, the cylindrical housing 151 is hollow to accommodate the cartridge 16, the fastening rib 153 protruding radially from the inlet end of the housing 151 and The fastening sleeve 152 further protrudes from an outlet end of the housing 151 and has a thread formed on an outer circumferential surface thereof.

The fastening rib 153 performs the same function as the fastening rib 124 formed on the pump case 121, and the fastening hole 114 and the rib groove formed in the main body 11 on the front surface of the flange 145. An incision having the same shape as that of 115 is formed. With this structure, in order to couple the cartridge case 15 to the pressing member 14, the fastening rib 153 is first fitted into the groove of the flange 145 corresponding to the rib groove 115. In this state, the housing 151 is rotated. Then, the fastening rib 153 is inserted into the groove of the flange 145, so that the housing 151 is firmly coupled to the cylinder 141.

In addition, the injection portion 17 is screwed to the outer circumferential surface of the fastening sleeve 152 formed at the outlet end of the housing 151.

In detail, the injection part 17 includes a head part 171 that is screwed to the fastening sleeve 152, and a needle 172 penetrating an end of the head part 171.

In addition, the cartridge 16 inserted into the housing 151 may be replaced after the drug is exhausted. The cartridge 16 is inserted into a cylindrical capsule 161, a drug filled in the capsule 161, that is, an injection liquid 163, and one end of the capsule 161, and the push rod 142. It includes a piston 162 and the sealing cap 164 fitted to the other end of the capsule 161 is pushed forward by the). The piston 162 and the sealing cap 164 may be made of a soft rubber material having elasticity, and may prevent the injection liquid 163 from leaking. Here, the injection liquid 163 may be an anesthetic liquid.

In addition, since the sealing cap 164 is made of a rubber material, the needle 172 may penetrate the sealing cap 164 when the injection part 17 is coupled to the housing 151. . As soon as one end of the needle 172 penetrates the sealing cap 164, a portion of the injection liquid 163 may be ejected through the needle 172 due to the basic pressure inside the capsule 161. It can be said.

Meanwhile, a control panel may be mounted on one surface of the main body 11.

In detail, the control panel may include a power supply unit 112, an operation unit 113, and a display unit 111. Power is supplied or cut off to the main body 11 by pressing the power source 112. And, the operation unit 113, a pressure setting button for adjusting the magnitude of the pressure generated by the pressure generating means, an injection amount setting button for setting the amount of the injection liquid 163 to be injected into the treatment site, and injection start Buttons, stop dispensing buttons, and the like.

In addition, the display unit 111, the injection pressure set through the operation unit 113, the amount of the injection solution 163 administered to the treatment site or the amount of the injection solution 163 remaining in the capsule 161, etc. Can be displayed.

Hereinafter, the operation of the drug injection device 10 according to an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 4, first, a user, that is, a practitioner, inserts a cartridge 16 containing an anesthetic liquid into the cartridge case 15. Then, the cartridge case 15 containing the cartridge 16 is coupled to the pressing member 14. Here, the injection unit 17 may be coupled to the front end of the cartridge case 15, and when the cartridge 16 is pushed to the cartridge case 15 to the end, the injection unit 17 constitutes the injection unit 17. The inlet end of the needle 172 passes through the sealing cap 164 of the cartridge 16. In this state, when the cartridge case 15 is coupled to the pressing unit 14 and the actuator 18 is operated, the injection liquid 163 is discharged through the needle 172.

Alternatively, the cartridge 16 is inserted into the cartridge case 15 from which the injection unit 17 is separated, and the cartridge 16 is coupled to the pressing member 14, and then the injection unit 17 is connected to the cartridge case 15. It can also be combined. In detail, when the injection part 17 is coupled to the fastening sleeve 152 of the cartridge case 15, the end portion of the needle 172 gradually penetrates the sealing cap 164 and the capsule 161. Will communicate with the internal space.

In such a state that the cartridge 16 is coupled to the cartridge case 15, the inlet end of the cartridge case 15 is screwed into the outlet end of the pressure member 14. Here, the pressing member 14, the tube 13, the pumping member 12 and the actuator 18 is in a state of being connected in one body.

In this state, the practitioner sticks the needle 172 into the surgical site of the patient while the cartridge case 15 is held by hand. Then, by pressing the operation unit 113 provided in the main body 11 to operate the pressure generating unit. Of course, before the needle 172 is inserted into the affected part of the patient, it is natural that power is applied to the main body 11 and the injection pressure and the injection amount are set in advance. When the surgeon presses the start button, power is applied to the actuator 18, and the plunger 181 moves forward to pressurize the pumping fluid 122 filled in the pumping case 121. The amount of current supplied to the actuator 18 is determined according to the injection pressure set by the practitioner, and the moving speed of the plunger 181 is determined.

Here, it should be noted that the actuator 18 is not limited to the solenoid member and the plunger 181 may be moved in the front and rear direction by using a rack / pinion structure or a gear coupling structure. For example, an actuator structure may be formed on the outer circumferential surface of the plunger 181, and the pinion or the gear may be engaged with the gear, and the motor may be connected to the pinion or the gear to provide rotational force.

In addition, the pumping fluid 122 may be applicable to a gas containing air as well as a liquid in a liquid state having almost no volume change such as water. In addition, the tube 13 may be a flexible tube capable of withstanding the pressure of the pumping fluid 122 generated by the pressure generating unit and simultaneously bending.

On the other hand, when the plunger 181 slowly pushes out the pumping fluid 122, the pumping fluid 122 is discharged from the pump case 121 through the connection port 123. In addition, the discharged pumping fluid 122 presses the rear end of the push rod 142 in the pressing member 14 along the tube 13. The front end of the push rod 142 is in contact with the rear surface of the piston 162 of the cartridge 16 is a basic state.

The push rod 142 is pressed by the pumping fluid 122 to pressurize the piston 162 while advancing. Then, the injection solution 163 filled in the capsule 161 is injected into the affected part of the patient through the needle 172. When the injection of the injection liquid 163 is completed by the set amount, the operation of the actuator 18 is stopped. In addition, the direction of the current supplied to the coil 183 is changed so that the plunger 181 retreats. Here, since the inside of the cylinder 141 and the inside of the tube 13 and the pump case 121 are substantially maintained in a vacuum state, the pumping fluid 122 may also be moved as the plunger 181 retreats. It is reintroduced into the pump case 121. Therefore, the push rod 142 is also retracted to move toward the end where the connection port 144 of the cylinder 141 is formed.

On the other hand, after drug injection, the practitioner separates the needle 172 from the affected part of the patient, and the cartridge case 15 is separated from the pressing member 14. Then, the cartridge 16 inserted into the cartridge case 15 may be removed and discarded or stored.

In this way, by using a fluid as a pressurizing medium for discharging the injection liquid 163 filled in the cartridge 16, and a driving means for generating pressure is mounted on the main body of the injection device, the procedure is performed in the state of being connected to the affected part of the patient. There is an advantage that the weight of the injection kit, which must be held by hand, is significantly reduced.

In particular, the injection kit held by the practitioner, that is, the components constituting the combination of the cartridge case 15 and the pressing member 14 is made of a plastic material has the advantage that the load is further reduced. Substantially, the injection kit includes a housing 151 constituting the cartridge case 15, the injection portion 17, a cylinder 141 and a push rod 142 constituting the pressing member 14, and The load on the cartridge 16 is all. And since the infusion kit is made of almost plastic material, the overall load is significantly reduced compared to conventional drug infusion devices.

First of all, since a heavy part, such as a motor generating a driving force, may be mounted inside the injection kit and not in the injection kit, the weight of the injection kit can be significantly reduced.

In addition, since the pump case 121 constituting the pumping member 12 can be removed and connected to the discharge port of the pump attached to the existing dental chair, the price of the injection device can be reduced. There is also an advantage.

In addition, when the actuator 18 according to the present invention is applied, since the moving speed of the plunger 181 is maintained uniformly if the amount of current supplied is constant, the injection liquid 163 is quantitatively injected.

Meanwhile, the cartridge 16 is inserted into a member corresponding to the pump case 121 of the present invention, that is, a member connected to the actuator 18, and the injection portion 17 is formed at the end of the tube 13. Compared with the conventional injection device structure in which the is connected, it has a great advantage in that there is no injection liquid 163 which is not used and is discarded.

In detail, in the above-described conventional injection device, since the tube is connected to the discharge port side of the case in which the cartridge is inserted, the injection liquid 163 remains inside the tube 13, and the residual injection liquid cannot be used. It must be abandoned. In contrast, the present invention, since the needle 172 is directly connected to the outlet side of the cartridge, there is no advantage in that no injection liquid is discarded. Furthermore, there is an advantage in that the remaining injection liquid remaining in the cartridge 16 can be reused by replacing only the injection part 17 newly.

Referring to FIG. 5, the actuator 20 according to another embodiment of the present invention includes a drive motor 21, a pinion 22 connected to a rotation shaft of the drive motor 21, and a gear 231 on one side thereof. ) Is formed to include a plunger 23 engaged with the pinion 22.

In detail, when the drive motor 21 rotates in the forward or reverse direction, the pinion 22 rotates, and the plunger 23 geared to the pinion 22 moves forward or backward. As a result, the pumping fluid 122 is pressurized by the plunger 23.

Claims

A pressure generator for generating pressure for injection of the injection solution;

A tube connected to the discharge end of the pressure generator;

A pressing member connected to the end of the tube;

A cartridge case connected to an end of the pressing member and into which a cartridge filled with an injection liquid is inserted; And

And an injection portion detachably connected to an end portion of the cartridge case and having a needle penetrating the affected part.
The method of claim 1,

The pressure generating unit,

A pumping member filled with a pumping fluid therein,

Drug injection device comprising an actuator having a plunger for pushing the pumping fluid.
The method of claim 2,

The actuator is a drug injection device, characterized in that the coil is wound around the plunger, the solenoid actuator in which the plunger linearly moves by the electromagnetic force formed in the coil.
The method of claim 3, wherein

Drug injection device, characterized in that the moving speed and the direction of the plunger is determined by the flow direction and the amount of current supplied to the coil.
The method of claim 2,

The actuator is,

With drive motor,

A pinion connected to the rotating shaft of the drive motor and

Drug injection device comprising a plunger is formed on the outer circumferential surface to mesh with the pinion.
The method of claim 2,

At least accommodate the actuator,

And a main body having a control panel for inputting operating conditions of the actuator.
The method of claim 6,

The combination of the pumping member and the actuator, or the pumping member alone can be separated from the main body drug injection device.
The method of claim 6,

The control panel,

And at least one or all of a button member for selecting a drug injection pressure and a drug injection amount, a button member for power on / off, and a button member for inputting a drug injection start or stop command.
The method of claim 6,

The control panel further includes a display unit for displaying at least one of drug injection pressure, drug injection amount, drug injection time, operating state.
The method of claim 1,

The pressing member,

A cylinder connected to the discharge end of the tube and a push rod movably received inside the cylinder,

And the push rod is moved by a pumping fluid moving along the tube.
The method of claim 1,

The injection unit,

And a head portion detachably coupled to an end portion of the cartridge case and through which the needle is inserted.
The method of claim 10,

The cartridge,

Capsules filled with drugs,

Sealing cap mounted to the front end of the capsule and

Drug injection device comprising a piston mounted to the rear end of the capsule.
The method of claim 12,

Drug injection device, characterized in that the front end of the push rod push the piston by the pumping fluid flowing along the tube.
The method of claim 1,

The cartridge case is a drug injection device, characterized in that detachable from the pressing member.
The method of claim 10,

The tube is a drug injection device, characterized in that the flexible tube to withstand the pressure of the pumping fluid.
The method of claim 10,

Wherein said pumping fluid is a liquid comprising water or a gas comprising air.