JPH05253298A - Syringe for endoscope - Google Patents

Abstract

PURPOSE:To provide a safe syringe for an endoscope, by which the curved state of an end curved portion can be recognized at hand. CONSTITUTION:A curving device 23 is provided for curving a freely bendable curved portion 10 by means of remote control from an at-hand control portion 20, the curved portion 10 being formed at the end side of an outer sheath 1; and the control portion is provided with an angle display means 31 for displaying the angle of curving of the curved portion 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope injector for inserting the forceps channel of an endoscope into a body cavity for injection.

[0002]

2. Description of the Related Art An endoscope injection instrument of this type is mounted on the proximal side of the liquid feeding tube by attaching an injection needle to the tip of the liquid feeding tube which is inserted in a flexible elongated outer tube so as to be able to move forward and backward. A syringe is connected to the mouthpiece so that the liquid medicine can be delivered from the syringe to the injection needle.

[0003]

When the injection needle of such an endoscope injection tool is pierced into the affected area, the needle tip will slip unless it is pierced from the front at an angle close to a right angle to the affected area. Often does not work.

Therefore, it is conceivable to add a bending device to the endoscope injection tool, which allows the distal end portion of the outer tube to be bent by remote control from the proximal operation portion.
However, in a usage environment in which the tip of the injection device is used with the tip of the endoscope slightly protruding, the tip of the injection device will be out of the field of view of the endoscope due to bending, and the bending state of the injection device tip will be sufficient. Can't understand.

Therefore, if the injection needle at the tip of the injection device is projected as it is, the needle may not pierce the affected area well or may erroneously puncture the target non-affected area, resulting in problems in sniperiness and safety. It was

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a safe endoscope injection tool capable of confirming the bending state of the tip bending portion on the hand side.

[0007]

In order to achieve the above-mentioned object, an endoscope injection tool of the present invention is provided with a distal end of a liquid feeding tube that is inserted into a flexible elongated outer tube so as to be able to advance and retract.
In an endoscope injection tool in which an injection needle is communicatively connected to the distal end of the outer tube, the bendable curved portion formed on the distal end side of the outer tube is remotely operated from a proximal operation section. A bending device for bending is provided, and an angle display means for displaying a bending angle of the bending portion is provided on the operation portion.

[0008]

Embodiments will be described with reference to the drawings. FIG. 2 shows an injection tool for an endoscope. In FIG.
It is a flexible, slender outer tube consisting of a tightly wound coil with a length of 1.5 mm and a length of about 1.5 m.

A tubular body 2 is coaxially connected to the outer tube 1 on the proximal side of the outer tube 1. Reference numeral 3 is a bend prevention coil attached to the outside of the outer tube 1 so that the outer tube 1 does not bend near the connection portion with the main body 2.

A liquid feeding tube 5 made of a fluororesin tube or the like is inserted into the outer tube 1 so as to extend and retract over substantially the entire length. An injection needle 6 is fixedly connected to the distal end of the liquid supply tube 5 so as to be able to move in and out from the distal end of the outer tube 1.

On the hand side of the liquid supply tube 5, a syringe connection mouthpiece 8 is fixed so as to project from the hand side of the main body 2 and to be able to move forward and backward. Further, a cylindrical operation tube 9 surrounding the vicinity of the proximal end of the liquid supply tube 5 is fixed to the syringe connection mouthpiece 8 so that the liquid supply tube 5 can be moved back and forth in the axial direction without bending.

The operation tube 9 is fitted in the main body 2 so as to be movable back and forth. Therefore, the operating tube 9 can be moved forward and backward in the axial direction by pinching it with a fingertip, and when the operating tube 9 is pushed into the main body 2, the injection needle 6 projects from the tip, and as shown in FIG. When the needle is pulled out from the main body 2, the injection needle 6 is pulled into the tip of the outer tube 1.

For example, lengths 1 to 3 on the tip side of the outer tube 1
A tip coil 1a, in which the latter half portion 10 is roughly wound with a gap, is connected to the cm portion by a connecting pipe 4 and is used. The coarsely wound portion has a lower waist than other portions and is easily bent, and is a bendable portion that can be bent by remote control. Hereinafter, this portion is referred to as the bending portion 10.

A bending operation portion 20 for bending the bending portion 10 is attached to the main body 2, and an operation wire 21 which is operated to move back and forth by the bending operation portion 20 passes through the inside of the outer tube 1 and the base portion of the bending portion 10. The connection wire 4 is pulled out to the outside, and the tip of the operation wire 21 is fixed to the tip 1b attached to the tip of the tip coil 1a.

FIG. 3 shows the structure of the bending operation section 20, and 23 is an operation tube which is movably fitted to the outer peripheral surface of the main body 2. A wire stopper pin 24 for locking the proximal end portion of the operation wire 21 to the operation tube 23 is loosely fitted in an elongated hole 25 formed in the main body 2 in the axial direction. Therefore, the operation tube 23 can be moved only in the axial direction of the main body 2, and the movement range thereof is such that the wire stop pin 24 has the long hole 25.
It is a length that can be moved within.

The operating cylinder 23, as shown in FIG.
The part on the hand side is divided from the end side by four slits. Then, the tapered surface 26 that abuts on the end portion
A tightening ring 27 formed with is screwed into the operating cylinder 23.

Therefore, the operating cylinder 23 can slide along the axial direction of the main body 2 when the tightening ring 27 is loosened. The quartered portion is pressed against the surface of the main body 2 by the tapered surface 26 of the tightening ring 27, and the operation tube 23
Is locked so that you cannot slide.

Further, on the outer peripheral surface of the main body 2, a scale 31 for indicating the bending angle of the bending portion 10 is marked inside the portion where the front end portion of the operating cylinder 23 slides. The graduation 31 is a linear graduation parallel to the front end edge of the operation tube 23, and for example, one graduation corresponds to the bending angle of the bending portion 10 so that one graduation is at an angle of 30 degrees to bend the bending portion 10. It is marked on the body 2 in the same direction and orientation.

In FIG. 3, reference numeral 12 is a joint pipe for connecting the liquid feeding tube 5 and the syringe connection mouthpiece 8. 13 is
The O-ring serves as a click for lightly locking the movement of the operation tube 9, and is attached to the mouth ring 15 attached to the mouth of the main body 2 by the tightening nut 14.

According to the endoscope injection tool of the embodiment thus configured, the operation wire 21 is pulled by sliding the operation tube 23 toward the hand side (right side in FIG. 3), and the operation wire 21 is pulled. As shown in FIG. 3, the operation wire 21 passing through the outside at the bending portion 10 is drawn into the outer tube 1, and the bending portion 10 bends.

Even when the bending portion 10 is out of the field of view of the endoscope due to bending, the bending portion 10 is changed from the state of the scale 31 visually recognized on the hand side at that time.
The bending angle and bending direction of can be known.

Then, when the tip portion of the tip coil 1a faces the target portion of the affected area at an angle close to a right angle, the tightening ring 27 is tightened and the state is locked.

After the lock is completed, the operation tube 9 is pushed into the main body 2. Then, as shown in FIG. 5, the injection needle 6 projects from the tip and is punctured at the target site of the affected area. Finally, if the drug solution is injected from a syringe (not shown) connected to the syringe connection base 8, the injection of the drug solution to the target site is completed.

Then, the injection needle 6 is retracted, and the tightening ring 27
When the operating tube 23 is moved forward by releasing the lock and releasing the lock, the operating wire 21 is pushed in the distal direction and the bending portion 10 returns to the straight state by its own restoring force, and the state is set to the scale 31. You can check it from.

The present invention is not limited to the above embodiment, and the bending angle of the bending portion 10 is the linear scale 3.
The number is not limited to 1, and may be displayed by any display means such as color coding and numbers.

[0026]

According to the injection device for an endoscope of the present invention, the bending angle of the bending portion on the distal end side is displayed on the operating portion on the hand side, and the distal end of the injection device for an endoscope is bent so that the field of view of the endoscope is improved. Since the bending angle of the bending part can be determined even if it is out of the range, it is possible to puncture the target affected area with the injection needle while bending the bending part to a desired angle, and it is very accurate and safe. A transendoscopic injection can be performed.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention in a curved state.

FIG. 2 is a side view of an embodiment of the present invention.

FIG. 3 is a side sectional view of a hand side portion of the embodiment of the present invention.

FIG. 4 is a front cross-sectional view (IV
-IV sectional view).

FIG. 5 is a side view of the needle protruding state according to the embodiment of the invention.

[Explanation of symbols]

 1 Outer Tube 5 Liquid Delivery Tube 6 Injection Needle 10 Bending Section 20 Bending Operation Section 21 Operation Wire 23 Operation Tube 31 Scale

Claims (1)

[Claims] 1. An endoscope injection tool in which an injection needle is communicatively connected to a distal end of a liquid feeding tube inserted in a flexible elongated outer sheath tube so as to be able to advance and retreat, A bending device is provided for bending the bendable bending portion formed on the distal end side portion of the mantle tube by remote operation from the proximal side operation portion, and an angle display for displaying the bending angle of the bending portion. An injector for an endoscope, characterized in that a means is provided in the operation section.