JPH03251260A - Medicine injecting device - Google Patents

Abstract

PURPOSE:To directly inject a solid medicine to the local affected part by providing a piercing needle having a hollow part for holding the solid medicine, and a wire for extruding the solid medicine in the piercing needle to the outside from its tip. CONSTITUTION:A piercing needle 11 is hollow in order to supply a solid medicine into a formed piercing-through hole. A hole is bored in the vicinity of the tip part of a grip member 2 so that a hollow part formed by the grip part 2 and the extruding part 3 does not become an airtight stage. A wire 4 is fixed to the tip of the extruding part 3. When a planting object is determined, the whole grip part 2 is pushed in, and the piercing needle 1 is pierced through the affected part. While monitoring a piercing-through state to the affected part of the piercing needle 1, pushing of the extruding part 3 and drawing-in of the grip part 2 are executed. After confirming a fact that the solid medicine 6 is planted completely into a hole pierced by the piercing needle 1, drawing-in of the grip part 2 is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drug injection device, and more particularly to a drug injection device for directly injecting a drug into an affected area.

[Prior Art] A syringe is a commonly known therapeutic device for injecting medicine into an affected area. The advantage of this device is that the liquid medicine is injected directly into the body, so it is effective quickly.

However, on the other hand, the administration range is limited to areas of the body close to the skin, and furthermore, there are problems such as a sustained release effect (prolonging the effect of the drug for a long time) cannot be expected.

[Problems to be Solved by the Invention] The present invention has been made in view of the prior art, and provides a drug that has a simple structure and enables direct injection of a solid drug that has a sustained release effect into a locally affected area. The present invention seeks to provide an injection device.

[Means for Solving the Problem] A drug injection device of the present invention that solves this problem has the configuration shown below. In other words, it is a drug injection device that directly injects a solid drug into an affected area,
The puncture needle includes a puncture needle having a hollow part for holding the solid drug, and a wire inserted into the hollow part to push the solid medicine in the puncture needle to the outside from the tip of the puncture needle.

[Operation] In this configuration of the present invention, after the distal end of the puncture needle is penetrated into the affected area, the solid drug is implanted into the hole formed by the penetration by manipulating the wire.

[Examples] Examples according to the present invention will be described in detail below with reference to the accompanying drawings.

<Explanation of the endoscope (Figures 4 and 5)> First, FIG. 4 shows the appearance of the endoscope 40.

The method of use is to pass the distal end 41 through the patient's mouth and through the patient's esophagus to observe the condition of the inner wall of the stomach, etc. In some cases, forceps or the like can be inserted through the forceps port 46 to perform various treatments. In the figure, reference numeral 42 is an eyepiece, through which an object beyond the tip 41 can be seen. Reference numeral 43 denotes an angle knob for changing the direction of curvature near the tip portion 41. Reference numeral 45 denotes a cable, to which a light source, air supply/suction pump, and various processing devices are connected.

Further, the distal end portion 41 and the endoscope main body are formed into a flexible tube, and the cross section thereof is shown in FIG. 5.

In the figure, 51a to 51d are angle wire holes, and by turning the angle knob 43 of the main body, one of the wires in each hole is pulled. Since the end of each wire is fixed near the tip 41,
By turning the angle knob 43, the direction of the tip 41 can be changed.

52 is an air supply channel, and 53 is a water supply channel.

54 is an image guide fiber, and the tip part -41
The image (light) captured from the image guide fiber 54 will pass through the image guide fiber 54. Therefore, the image can be viewed by looking through the eyepiece 42. 55 a, 5
5b is a light guide fiber that guides light to the distal end 41 to illuminate the affected area.

Further, 54 is a forceps channel (diameter: 2 to 3 mm), through which the forceps inserted from the forceps 046 described above can be taken out from the tip portion 41. still,
Although the description will be complicated, the endoscope 20 used in the embodiment is a commonly used endoscope and does not need to be a special endoscope.

<Description of drug injection device> Through the forceps port 46 of the endoscope 40 configured as described above,
An example of an injection device for directly injecting a solid drug into an affected area (for example, the inner wall of the stomach) is shown in FIG. To briefly explain the outline of this injection device 100, it is for "directly implanting a solid drug into an affected area", and its configuration and operating method will be explained below.

In the figure, reference numeral 1 denotes a puncture needle for puncturing the affected area, and is hollow for supplying a solid drug into the formed puncture hole in a process described later. Reference numeral 2 designates a gripping portion, and 3 designates an extrusion portion that is movable in the left-right direction in the drawing along the hollow portion of the gripping portion 2. However, a hole (not shown) is provided near the tip of the grip part 2 so that the hollow part formed by the grip part 2 and the extrusion part 3 is not airtight. Reference numeral 4 denotes a non-stretchable wire fixed to the tip of the extruded portion 4, which is slightly bulged as shown in the figure to increase the area of the tip. 5 is a flexible tube interposed between the puncture needle 1 and the grip part 2, and the wire 4 is inserted into this tube 5.
It is designed to pass through the inside of the 6 is a solid drug;
For example, a porous material impregnated with a drug. The porous material may be activated carbon, aluminum oxide, or any other material that is safe to implant in living organisms. Furthermore, since the diameter of the puncture needle 1 in the example was set to be about the same as that of a normal injection needle, the outer diameter of this solid drug was 0.
It will be about 3 to 1IIIO1. A rubber member 7 is used to hold the solid drug 6 with a predetermined pressure in order to prevent it from falling out of the puncture needle 1.

As described above, the injection device 100 according to the embodiment has the wire 4 by pushing the push-out part 3 toward the left in the figure.
The tip of the solid drug 6 can be pushed out of the device.

Therefore, the solid drug 6 can be implanted into the affected area through the forceps channel of the endoscope 40 shown above.

The specific operation will be explained using FIG. 2.

First, while looking through the eyepiece 42 of the endoscope 40, the implantation target is determined, and the entire gripping part 2 is pushed in the direction of the forceps port 46. This causes the puncture needle 1 to penetrate into the affected area (FIG. 2(A)).

Thereafter, while monitoring the state of penetration of the puncture needle 1 into the affected area, the push-out section 3 is pushed and the grip section 2 is pulled in (FIGS. 2(B) and 2(C)).

After confirming that the solid drug 6 is completely implanted in the hole made with the puncture needle 1, the gripping part 2 is retracted (FIG. 2(D)).

As a result, the following effects will be obtained.

■Preparation of solid drugs makes it possible to artificially control the diffusion of drugs.

■ Sustained release effect, that is, since it is a solid drug rather than a normal liquid drug, it is possible to deliver the effect of the drug to the affected area over time.

■By implanting an ultrashort wave absorbing material (magnetic material) as a solid drug, localized thermal treatment becomes possible.

■Since it is literally possible to have the drug act only on the affected area, the side effects of the drug on the whole body are reduced and it is possible to use a high concentration of the drug. It is especially effective for drugs that are taken twice or once a day.

■Safety is between the liquid medicine syringe and the road.

<Description of Second Embodiment> In the above description, a medicine was implanted into, for example, the stomach wall through the forceps channel 54 of the endoscope 40. However, endoscope 4
There is a limit to the range that can be observed at 0, and for example, organs such as the liver cannot be treated using the method described in the first embodiment.

Therefore, in the embodiment of this section 2, an example will be shown in which the tip of the puncture needle is directly reached to the affected area through the patient's skin, and a solid drug is injected.

FIG. 3 shows the structure of an injection device 200 in the second embodiment. However, the same parts in FIG. 1 are given the same reference numerals.

The difference from the injection device 100 of the first embodiment is that the tube 4 and rubber 7 are not provided, and the puncture needle 1 is directly connected to the grip portion 2. The puncture needle 1 in this embodiment has a length sufficient for its tip to reach the affected area.

Furthermore, the reason why the rubber 7 that was holding the solid drug 6 in the first embodiment was removed is because the bulge caused by the rubber would hinder penetration. In order to prevent the solid drug 6 from spilling from the tip of the puncture needle 1,
It is sufficient if there is a sufficient frictional force between the inner wall of the solid medicine 6 and the solid medicine 6. Therefore, it is possible to apply oil or the like between this time, but in this example, by soaking some moisture between this time, Dealt with it. Of course, the water is soaked immediately before administration. Of course, other methods may be used to prevent the solid drug 6 from falling.

Drug injection device 2 of the second embodiment having the above configuration
00 is used in conjunction with an ultrasonic scanner, for example. After confirming through the monitor that the tip of the puncture needle 1 has reached the target affected area, the same procedure as described in FIG. 2 is carried out.

As explained above, in the second embodiment, the first
In addition to the effects of the embodiment, any organ that can be injected can be administered with the drug.

In addition, in the configuration shown in FIG. 3, an example is shown in which only one solid drug is housed inside the puncture needle, but if the drug has appropriate strength, multiple solid medicines can be housed inside the puncture needle. It is also possible to construct a device that continuously injects by using multiple units.

Furthermore, as in the first embodiment, localized thermal treatment is possible by using an ultrashort wave absorbing material as the solid drug.

As can be seen from the above description, the drug injection device in the first and second embodiments has a very simple structure and can be manufactured at low cost.

[Effects of the Invention] As explained above, according to the present invention, it is possible to directly inject a solid drug that has a disinfecting effect into a locally affected area with a simple configuration.

Furthermore, if an ultrashort wave absorbing material is used as a solid drug, localized thermal treatment becomes possible.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the structure of the drug injection device in the first embodiment, FIG. 2 is a diagram for explaining the drug implantation process in the first embodiment, and FIG. 3 is a diagram showing the structure of the drug injection device in the second embodiment. FIG. 4 is a diagram showing the structure of the drug injection device, FIG. 4 is a diagram showing the external configuration of the endoscope, and FIG. 5 is a cross-sectional view of the tube of the endoscope. In the figure, 1...Puncture needle, 2...Gripping part,... Pushing part, 4...Wire, 5...Tube, 6...Solid drug, 7...Rubber, 100 and 200...Medicine injection device. Figure 2 Figure 4

Claims (2)

[Claims] (1) A drug injection device for directly injecting a solid drug into an affected area, which comprises: a puncture needle having a hollow portion for holding the solid drug; A drug injection device comprising a wire for pushing a solid drug out from the tip of a puncture needle. (2) The drug injection device according to claim 1, wherein the solid drug contains an ultrashort wave absorbing material.