JPH0216763Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an injection needle for a syringe that injects a medicinal solution directly into a lesion while observing the lesion formed in a body cavity using an endoscope.

(Prior art) As is well known, injecting a medicinal solution directly into a lesion while observing the lesion formed within a body cavity with an endoscope is different from oral administration or injection from outside the body, and is extremely noticeable. In order to make it easier to insert the injection needle into the forceps channel provided on the endoscope, as shown in Fig. A flexible guide tube 20 made of synthetic resin such as ethylene is inserted into the guide tube 20, and a puncture needle into the body is fixed to the tip of the elongated flexible tube made of synthetic resin. , and a syringe needle is inserted into the proximal side of the rear end of the syringe, which is provided with a mounting portion for a drug solution spout of the syringe barrel.

(Problem to be Solved by the Invention) By the way, when inserting an injection needle along the guide tube 20, the base of the puncture needle is fixed to the tip of a flexible elongated tube made of synthetic resin or the like. However, since the elongated tube that is the main body of the injection needle is relatively flexible, and the puncture needle is fixed at the tip, insertion is not very smooth and requires considerable skill. Along with the flexible guide tube 20, there are unavoidable difficulties and disadvantages in that the elongated tube, which is the main body of the injection needle, is easily damaged and the sharp puncturing part of the puncturing needle becomes dull prematurely.

(Means for Solving the Problems) In view of the above-mentioned circumstances, the present invention provides an injection needle body that can be freely inserted into a guide tube that allows the injection needle to pass through the endoscope; An endoscopic injection needle is made of a thin steel wire with a stopper that is loosely inserted into the needle body, and the injection needle body is mainly composed of an elongated flexible tube, and the tip thereof has a sharp tip. The puncture needle that serves as the puncture part is fixed, and the opening on the base side serves as a stopper attachment port and drug solution spout, which serves as a fixing part for fitting the thin steel wire cap with the plug and the drug solution spout of the syringe barrel. In addition to the mounting opening, the base side is provided with a mounting opening for the drug solution spout of the syringe barrel, which communicates with the through hole on the base side and whose lid can be attached and detached, and the steel material with the stopper. The thin wire has a length that reaches from the base of the flexible tube to near the tip, and a plug is fixed to the base of the flexible tube, and the plug is fitted into and fixed in the plug mounting port and drug solution spout mounting port. This feature makes it possible to provide an endoscopic injection needle that is completely free of the above-mentioned difficulties and drawbacks.

(Function) The endoscopic injection needle according to the present invention has the above-mentioned configuration, and when it is used,
Normally, a thin steel wire with a stopper that can be loosely inserted into the stretched injection needle body is inserted through the stopper attachment port and drug solution spout attachment port, and the stopper is attached to the stopper. It is inserted and fixed into the opening for attaching the injection opening and drug solution outlet to form an endoscopic injection needle, and as before, the puncture needle of the injection needle body of this injection needle protrudes from the tip of the guide tube. The guide tube into which the injection needle has been inserted is fitted into the endoscope having a passage through which the guide tube can be inserted so that it does not protrude beyond the tip of the passage.

As is well known, an endoscope into which a guide tube into which an endoscopic injection needle is inserted is inserted into a body cavity, and the tip of the endoscope is inserted while observing the inside of the body cavity. The injection needle, which is reinforced with a thin steel wire with a stopper, is guided and directed to the lesion within the body cavity by manipulating the operating knob etc. provided on the hand control section of the endoscope. Push the inserted guide tube into the body cavity from the distal end of the insertion section.

If the viscosity of the drug solution to be injected into the lesion is low, attach the syringe barrel to the drug solution spout attachment port attached to the injection needle body, leave the guide tube as it is, and push the needle further. The puncture needle is inserted into the lesion, the syringe barrel is operated, and the through hole of the injection needle body is formed by a thin steel wire with a stopper. Limit the flow rate of the drug solution and inject slowly in small amounts. Conversely, if the viscosity of the drug solution to be injected into the lesion is high, insert a thin steel wire with a stopper into the injection needle before inserting the puncture needle into the lesion. Pull it out from the main body to widen the cross-sectional area of the medicinal liquid passage, attach and fix the medicinal liquid spout of the syringe filled with the desired high-viscosity medicinal liquid to the stopper attachment port and medicinal liquid spout attachment port, and attach the other side. Seal the drug solution spout installation opening with the lid, push the needle body further, insert the puncture needle into the lesion, operate the syringe barrel, and apply the highly viscous drug solution to the lesion. In addition, the flow rate is approximately the same as that of low-viscosity chemical solutions, allowing for smooth injection.

(Example) Hereinafter, an example of the endoscopic injection needle according to the present invention will be described in detail with reference to drawings showing a conventional guide tube that is also used therewith.

First, in FIG. 1 showing an injection needle body for an endoscope injection needle structure according to the present invention, 1 is the injection needle body, and this injection needle body 1 can be freely inserted into the guide tube 20. The main body is a thick and flexible elongated tube 2 made of synthetic resin, etc. A puncture needle 3 with a sharp tip is fixed to the tip of the tube 2, and the base side has hardness. Therefore, the diameter is made slightly larger to form the tapered part 4, and through the connecting part 5 which is linearly connected to the through hole of the main tube 2, the plug body 12 of the mandolin wire 11 and the syringe barrel (not shown) are connected. The connecting part 5 has a lid body that communicates with the through hole of the connecting part 5 and serves as a stopper attachment port and a medicine liquid spout attachment opening 6 that serves as a fitting and fixing part for the chemical liquid spout (omitted). It has a through hole which is sealed by a hole 8, and is formed by attaching a drug solution spout mounting opening 7 into which the drug solution spout of the syringe barrel is inserted and fixed.

Further, in FIG. 2 showing a mandolin wire with a plug as a thin steel wire with a plug for use in configuring an endoscope injection needle according to the present invention, 11 is a mandoline wire with a plug; (SUS304WPB) It is formed by fixing a stopper 13 to the base of the main body 12, and the mandoline wire main body 12 can be loosely inserted through the stopper attachment opening and drug solution spout attachment opening 6 of the injection needle body 1. When the plug 13 fixed to the base is inserted and fixed into the plug attachment port/medicinal solution spout attachment port 6, the fixing portion of the tube 2 and the puncture needle 3 is the same. It is made long enough to reach close to each other.

The endoscopic injection needle according to the present invention is as described above.
It consists of the injection needle body 1 and the mandolin wire 11 with a stopper, and when it is used, the mandoline stopper 11 with the stopper can be inserted loosely into the injection needle main body 1 that is immediately extended. Mandolin wire body 12
is inserted into the stopper attachment port 6 and the drug solution outlet attachment port 6, and the stopper 12 is fitted and fixed in the port 6 to form an endoscopic injection needle.The mandoline wire 1 with the stopper
1, this injection needle is inserted so that the puncture needle 3 of the injection needle body 1 does not protrude beyond the tip of the guide tube 20, as before, but this insertion operation is extremely difficult. The guide tube 20, into which the injection needle has been inserted in this way, is now smoothed and easily inserted.
This is inserted so that it does not protrude beyond the tip of a forceps passage or the like in an endoscope through which it can be inserted, and this insertion operation is also much smoother than previous ones of this kind.

As is well known, the endoscope into which the guide tube 20 into which the endoscopic injection needle is inserted is inserted into the body cavity by inserting its insertion portion into the body cavity.
While observing the inside of the body cavity, guide and direct the distal end of the insertion part to the lesion in the body cavity by operating the operating knob provided on the hand control part, and then insert the mandolin wire 11 with a stopper. The guide tube 20 into which the injection needle reinforced with the wire body 12 is inserted is pushed into the body cavity from the distal end of the insertion section. Therefore, this operation can also be performed very smoothly and easily without any difficulty.

If the viscosity of the drug solution to be injected into the lesion is low, the syringe barrel is attached to the drug solution spout attachment port 7 attached to the injection needle body 1, the guide tube 20 is left as is, and the stopper is The reinforced mandoline wire 11 is inserted, the reinforced injection needle is pushed further, the puncture needle 3 is inserted into the lesion, the syringe barrel is operated, and the mandoline wire body 1 is inserted.
2, the flow rate of the low-viscosity drug is limited in the drug solution passage formed by the through hole of the tube 2 of the injection needle body 1, and the flow rate of the drug solution with a low viscosity is limited, and the drug solution is injected slowly little by little. If the viscosity of the drug solution to be injected is high, before puncturing the lesion with the puncture needle 3, pull out the mandoline wire 11 with a stopper from the needle body 1 to widen the cross-sectional area of the drug solution passage, and attach the stopper. The drug solution spout of a syringe filled with a desired high-viscosity drug solution is attached and fixed to the drug solution spout attachment port 6 which also functions as a use spout, and the other attached drug solution spout attachment port 7 is attached to the lid 8. The injection needle body 1 is further pushed forward to puncture the lesion with the puncture needle 3, and the syringe barrel is operated to inject a highly viscous drug solution into the lesion at a flow rate approximately equal to that of a low viscosity drug solution. etc., to enable smooth injection.

(Effects of the invention) As is clear from the above explanation, according to the present invention, when inserting an endoscopic injection needle into the conventional guide tube for guiding an endoscopic injection needle, It is possible to perform the puncture very smoothly and easily, without any difficulty, without damaging the elongated flexible tube that is the main part of the injection needle body, or the puncture needle fixed to the tip of the tube. In addition, the operation of inserting the guide tube into which the endoscopic injection needle according to the present invention is inserted into the endoscope is not only extremely smooth and easy, but also allows the operation to proceed further to the lesion within the body cavity. When injecting chemical liquids, it is possible to inject low-viscosity chemical liquids and high-viscosity chemical liquids at approximately the same flow rate. It became possible to provide injection needles.

[Brief explanation of the drawing]

FIG. 1 is a side view showing only the injection needle body for an endoscope injection needle structure according to the present invention, with a part omitted, and FIG. FIG. 3 is a side view with a part omitted of a mandolin wire with a stopper, which is an example of only a fine steel wire with a stopper, for configuring a syringe needle; FIG. Fig. 4 is a side view with a part of the guide tube for guiding the injection needle omitted, and Fig. 4 shows the injection needle body shown in Fig. 1 and the plug shown in Fig. 2 in the guide tube shown in Fig. 3. FIG. 2 is a side view, with some parts omitted, of an endoscope injection needle configured with a mandolin wire attached to the body inserted through the endoscope. 1; injection needle body, 2; tube, 3; puncture needle,
4; Tapered part, 5; Connecting part, 6; Port for attaching a stopper and a mouth for attaching a chemical solution spout, 7; Port for attaching a chemical solution spout, 8; Lid body, 11; Mandoline wire with a stopper, 1
2; mandoline wire body, 13; plug body, 20; guide tube.

Claims (1)

[Scope of utility model registration request] An endoscopic injection needle comprising an injection needle body that can be freely inserted into a guide tube that can be inserted into an endoscope, and a thin steel wire with a stopper that is loosely inserted into the injection needle body, the injection needle body as described above. The main body is a long and thin flexible tube, and a puncture needle with a sharp tip is fixed to the tip, and the opening on the base side is used for the purpose of injection and the stopper made of a thin steel wire with a stopper. In addition to serving as a stopper attachment port that serves as a fitting and fixing part for the chemical solution spout of the cylinder and a chemical solution spout attachment port, the base side has a
The tube is connected to the through-hole on the base side, and has an opening for attaching a drug solution spout of the syringe barrel to which the lid can be attached and detached, and the thin steel wire with the stopper extends from the base of the flexible tube to the tip. With a length that reaches almost the
An endoscopic injection needle, characterized in that a stopper is fixed to the base of the needle, the stopper being inserted and fixed into the stopper fitting opening and drug solution outlet fitting opening.