JPH0432113Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a medical puncture needle that is used by inserting into human tissue, and in particular, it is used to inject an embolizing agent into esophageal varices that occur due to liver cirrhosis, etc. The present invention relates to improvements in puncture needles used in embolization therapy, which involves embolization, and sclerotherapy, which injects a sclerosing agent to cure the sclerotherapy.

(Prior art) Treatment of esophageal varices caused by liver cirrhosis, etc. by embolization therapy or sclerotherapy involves inserting an endoscope and an external tube for a puncture needle into the esophagus via an endoscope or guide tube. While confirming the position and condition of the varicose vein, operate the forceps port of the endoscope or the puncture needle built into the guide tube to insert it into the varicose vein or its vicinity, and apply an embolizing agent or sclerosing agent. Do it by injecting it.

The puncture needle consists of an outer tube, an inner needle tube and a needle tube housed inside the outer tube, and the outer tube and inner needle tube are transparent to confirm whether the needle tube has been inserted in the correct position by checking the inflow of blood. Or, since it is translucent, it is not easy to see through the needle tube through the outer tube and the inner needle tube to confirm the protrusion state of the needle tube from the outer tube or the position of the needle tube. Furthermore, the light irradiating the inside of the esophagus is reflected on the surface of the outer tube, making confirmation of these things even more difficult. Therefore, if the protruding state and position of the needle tube cannot be confirmed and the needle is carelessly moved or inserted, the varicose vein may be damaged by the cutting edge of the needle tube, causing heavy bleeding. When inserting a needle accurately, it takes time to confirm the position of the needle, and the endoscope or guide tube extends to the patient's mouth, which means that the endoscope or guide tube is inserted for a long time. There is the problem of causing time pain.

(Problems to be solved by the present invention) The present invention solves these conventional problems and makes it possible to easily check the protruding state and position of the needle tube, thereby preventing inadvertent damage to varicose veins with the needle tube. To provide a medical puncture needle that can perform treatment in a short time without causing pain to a patient.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a transparent outer tube, a transparent inner needle tube inserted through the outer tube, and a tube provided at the distal end of the inner needle tube. The outer cylindrical tube is characterized by an opaque non-reflective portion provided on the outer periphery of the distal end of the outer cylindrical tube.

(Function) The present invention provides an opaque non-reflective portion at the distal end of the see-through outer tube of the medical puncture needle configured as described above, so that the needle tube can be projected from the outer tube without seeing through the opaque non-reflective portion. and the position of the needle tube.
In addition, to prevent the non-reflective part from reflecting the light irradiating the esophagus and to make confirmation even easier, the protruding needle tube is accurately inserted into the varicose vein or its vicinity, and an embolizing agent or hardening agent is applied. Inject the agent.

(Example) An example of the present invention will be described in detail with reference to FIGS. 1 to 3.

FIG. 1 is an explanatory diagram showing the overall structure, FIG. 2 is an explanatory cross-sectional view when it is protruded, and FIG. 3 is an explanatory cross-sectional view before it is protruded. This medical puncture needle includes a transparent outer cylindrical tube 1, a colored portion 2 provided on the outer periphery of the distal end of the outer cylindrical tube 1 and constituting an opaque non-reflective portion, and
A transparent inner needle tube 3 is inserted into the inner needle tube 3, a needle tube 4 provided at the tip of the inner needle tube 3, an outer tube base 9 to which the outer tube tube 1 is attached with a cap 8, and the outer tube base 9 is inserted. It consists of an inner needle base 10 that is attached to the end of the inner needle tube 3 and operated.

The puncture needle is inserted into the esophagus together with an endoscope or a guide tube (not shown) with the needle tube 4 housed inside the outer tube 1 as shown in FIG. The colored part 2 provided at the distal end of the tube prevents reflection of light irradiating the inside of the esophagus, so the outer tube 1 is aimed at the colored part 2 under good visibility.
Move the needle to the insertion position near the varicose vein. Next, the needle tube 4 provided at the tip of the inner needle tube 3 inserted through the outer tube 1 is made to protrude from the outer tube 1.
The state of protrusion of the needle tube 4 from the colored part 2 is confirmed, the position of the needle tube 4 is confirmed under good visibility, and the needle tube 4 is accurately inserted into the varicose vein. At this time,
As shown in FIG. 4, a colored part 5 constituting an opaque non-reflective part is provided on the outer periphery of the distal end of the inner needle tube 3 to make it easier to confirm the protruding state and position of the needle tube 4. good.

5 to 8 show other embodiments of the present invention, and FIG. 5 shows a case where the outer tube 1 and the inner needle tube 3 are made of a material to which it is difficult to attach a coloring agent, such as Teflon. and other cases where necessary,
The puncture needle has the same structure as the one described above, and includes a metal tube 6 that fits into the tip of the outer cylindrical tube 1 and a metal tube 7 that locks the needle tube 4 and fits into the tip of the inner needle tube 3. Colored parts 2 and 5 are provided on the outer periphery of the distal ends of the metal tubes 6 and 7 between the distal ends of the outer cylindrical tube 1 and the distal ends of the inner needle tube 3, similar to that in FIG. It is possible to increase the effectiveness of

FIG. 6 shows a case where the inner needle tube 3 is made of a material such as Teflon, and the inner needle tube 3 is provided with the metal tube 7 having the colored portion 5, and the outer tube 1 is provided with the colored portion 2 directly. ing. FIG. 7 shows a case where the outer tube 1 is made of a material such as Teflon, and the outer tube 1 is provided with the metal tube 6 having the colored portion 2, which has a stepped portion 6a at the tip. It also serves as a stopper when the needle tube 4 is projected. The stopper is provided in consideration of further safety, but it may be omitted.
FIG. 8 shows a case where the outer cylindrical tube 1 is made of a material such as Teflon, and the outer cylindrical tube 1 is provided with the metal tube 6 having the colored portion 2, and the blade surface of the needle tube 4 is colored. In this case, the material of the needle tube 4 may be colored stainless steel and the trouble of coloring may be omitted. Further, the metal tube 6 having the colored portion 2 on the outer cylindrical tube 1
The inner needle tube 3 may be provided with the colored portion 5 directly, or the inner needle tube 3 may be provided with the colored portion 5 and the needle tube 4 may be colored.

Here, general color paint may be used for the opaque non-reflective portion at the tip of the outer tube 1 or the inner needle tube 3, but preferably, the outer tube 1, the inner needle tube 3, and the In order to prevent peeling from the metal tubes 6 and 7, they are formed using a colored adhesive, and the surfaces of the distal ends of the outer cylindrical tube 1 and the inner needle tube 3 are roughened. It is also possible to use a method such as forming an opaque non-reflective portion using a transparent material.

(Effects) As is clear from the above description, the present invention provides an opaque non-reflective portion to make the outer tube opaque, making it easy to see how the needle tube protrudes from the tip of the outer tube. In addition, the non-reflective portion prevents reflection of light and makes it easy to confirm the position of the needle tube, making it easier for the patient to treat varicose veins in a short time without inadvertently damaging them. It is possible to provide a medical puncture needle that does not cause pain to patients.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram showing the overall structure of the present invention, Figure 2
3 are explanatory sectional views of the puncture needle tip shown in FIG. 1, and FIGS. 4 to 8 are explanatory sectional views of the puncture needle tip showing other embodiments of the present invention. 1...Outer cylinder tube, 2...Colored part, 3...Inner needle tube,
4...Needle tube.

Claims (1)

[Scope of utility model registration request] It consists of a see-through outer tube, a see-through inner needle tube inserted through the outer tube, and a needle tube provided at the tip of the inner needle tube, and an opaque non-reflective part is provided on the outer periphery of the tip of the outer tube. A medical puncture needle characterized by: