JPS647780B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for automatically inserting and removing treatment tools such as forceps, catheters, and high-frequency knives inserted into body cavities through an endoscope.

Conventionally, a surgeon manually inserted these treatment tools into a body cavity via an endoscope. However, for example, an endoscope for the deep colon has a total length of up to 2 m, so it takes a long time to insert this treatment instrument, which places a heavy burden on the patient and the operator.
Furthermore, when inserting the treatment instrument in a hurry, the sheath of the treatment instrument may be bent.

Therefore, in recent years, insertion and removal of treatment tools have been automatically performed using insertion and removal devices. In this insertion/extraction device, a pair of rollers made of a soft elastic material are rotated in contact with each other by a motor, and after feeding the treatment tool between the pair of rollers, the motor is activated. The treatment instrument is inserted into the body cavity by the following. Then, the operator looks into the body cavity through the eyepiece of the endoscope, and when the operator confirms that the treatment instrument has protruded into the body cavity, the operator turns off the switch on the motor to stop insertion of the treatment instrument. was.

However, with this method, the length of the protrusion of the treatment instrument into the body cavity is controlled by relying on the surgeon's senses, so there is a possibility that the operator may not be able to protrude the treatment instrument into the body cavity due to misperception. In the worst case scenario, it could cause a hole in the body wall, which is a serious safety problem.

This invention was made based on the above-mentioned circumstances, and its purpose is to automatically insert and remove a treatment instrument and, when the treatment instrument protrudes a predetermined length into the body cavity at the time of insertion. It is an object of the present invention to provide a treatment tool insertion/extraction device for an endoscope, which automatically stops the insertion of the treatment tool to safely insert the treatment tool.

An embodiment of the present invention will be described below with reference to the drawings. 1 in the figure is the main body of the treatment instrument insertion/extraction device.
The main body 1 consists of a case 2 and a guide tube 3 whose one end is attached to the case 2. Insertion guide members 4 and 5 are provided on opposing side walls of the case 2, respectively, and one of the insertion guide members 5
One end of the guide tube 3 is connected to.
The case 2 includes the insertion guide member 4,
A sheath 7 of a treatment instrument such as forceps 6 is passed through the guide tube 3 through the guide tube 3, and is configured to protrude from the distal end of the guide tube 3. The guide tube 3 is made of a relatively soft synthetic resin, etc., has appropriate flexibility, and has a distal end that can be detachably inserted into a treatment instrument insertion port 9 formed in the operating section 8a of the endoscope 8. A mounting member 10 is provided to be mounted. A drive mechanism 11 for driving the forceps 6 passing through the case 2 is built into the case 2. 12,1 in the figure
Reference numeral 2 denotes its driving rollers, and these driving rollers 12, 12 are made of an elastic material such as soft synthetic rubber, and the sheath 7 of the forceps 6 passing through the case 2
The shafts 13 and 13 are rotatably supported by shafts 13 and 13 provided in a direction perpendicular to the shafts 13 and 13, and are in rolling contact with each other. Gears 14, 14 are attached to these shafts 13, 13, respectively, and these gears 14,
14 are in mesh with each other. A DC motor 15 for driving is provided inside the case 2, and a gear 17 is attached to a rotating shaft 16 of the DC motor 15. It fits on one side. Therefore, the drive rollers 12, 12 are configured to be rotated in opposite directions by the DC motor 15. The sheath 7 of the forceps 6 inserted into the case 2 is connected to the pair of driving rollers 1.
The drive rollers 12 and 12 are designed to be squeezed between them, and the drive rollers 12 and 12 are elastically deformed by this pinching pressure and come into close contact with the sheath 7 of the forceps 6. Then, when the DC motor 15 rotates forward and the drive rollers 12, 12 rotate in the direction shown by the arrow in FIG. the direction in which the forceps 6 are inserted, that is, the direction in which the forceps 6 are inserted, and the DC motor 15
When the forceps 6 are reversed, the forceps 6 move in the pulling direction.

Further, in the case 2, a storage space 17 is separated by a partition plate 16 on the side where the forceps 6 are inserted into the pair of drive rollers 12, 12.
The sheath 7 penetrates the case 2 via the storage space 17. In the storage space 17, a light receiving element 18 and a light emitter 19 such as a lamp are arranged diagonally above the light receiving element 18, and the light outputted from the light emitter 19 is transmitted to the case 2 as shown in FIG. The light is obliquely reflected on the surface of the sheath 7 that has passed through it, and is received by the light receiving element 18. In addition, the light receiving element 18 and the light emitter 19
The DC motor 15 is connected to an electronic control circuit 21 equipped with a reversing switch 20 as a control mechanism, and when a power cord 22 led out from the electronic control circuit 21 is connected to a power source (not shown), the electronic The control circuit 21 is activated so that the light emitter 19 emits light. And electronic control circuit 2
1 is configured to rotate or stop the DC motor 15 in the forward direction depending on the level of the amount of light detected by the light receiving element 18, and a reverse rotation switch 20.
By turning on the DC motor 15, the DC motor 15 is rotated in the reverse direction.

Furthermore, the sheath 7 of the forceps 6 includes a forceps operating section 6.
The processing sheath portion 23 is formed in such a manner that the surface of a portion of a certain length on the proximal end side where the portions a are connected has a different light reflectance compared to the surface of other portions.

Next, the operation of the above configuration will be explained. First, the treatment instrument insertion device attaches the attachment member 10 of the guide tube 3 to the treatment instrument insertion opening 9 of the endoscope 8 as shown in FIG.
It is used by inserting the sheath 7 of the forceps 6 inside. When inserting the forceps 6 into the body cavity,
Insert the sheath 7 into the case 2 from one insertion guide member 4 side.
When the light is inserted into the interior, the light from the light emitter 19 is reflected on the surface of the sheath 7 and received by the light receiving element 18 as shown by the arrow in FIG. The drive rollers 12, 12 of are driven. Therefore, the sheath 7 of the forceps 6 is clamped by the pair of driving rollers 12, 12 and guided to the guide tube 3, and then inserted into the treatment instrument insertion channel from the treatment instrument insertion opening 9 of the endoscope 8. , protrudes from the distal end of the insertion section of the endoscope 8.

In this way, the sheath 7 of the treatment instrument 6 is automatically inserted into the body cavity, and when the protrusion length into the body cavity reaches a predetermined value, the sheath 7 formed at the proximal end of the sheath 7 The processing sheath parts 23 having different reflectances are located inside the case 2. Then, the light is output from the light emitting body 19 and sent to the processing sheath section 23 of the sheath 7.
The amount of light reflected and received by the light receiving element 18 changes, and the level of the current flowing through the light receiving element 18 changes accordingly.The electronic control circuit 21 detects this change in current, and uses this detection signal. DC motor 1
Stop 5. Therefore, the sheath 7 of the forceps 6 is automatically inserted into the body cavity by a predetermined length.

Moreover, when pulling out the forceps 6, if the reverse switch 20 is operated to reverse the DC motor 15,
The sheath 7 of the forceps 6 can be automatically removed by a pair of drive rollers 12, 12 which are rotated in the opposite direction to the direction of insertion.

That is, when inserting the forceps 6, the operator simply inserts the sheath 7 into the case 2 from one of the insertion guide members 4, and the forceps 6 can be inserted into the body cavity for a predetermined length automatically and without relying on the operator's senses. This allows for quick removal by simply operating the reverse switch 20.

Note that this invention is not limited to the above embodiment,
For example, a treatment instrument insertion/extraction device has its main body 1 connected to an endoscope 8.
The guide tube 3 may be built-in or integrally provided in the operating section 8a. With such a configuration, the guide tube 3 is not necessary, and there is no need to support the main body 1 by hand separately from the endoscope 8. , it becomes easier to insert and remove the forceps 6.

As described above, the present invention provides portions with different surface reflectances in the length direction of the insertion portion of the treatment instrument, and drives the treatment instrument in both insertion and removal directions with respect to the treatment instrument insertion port of the endoscope. A light-emitting body and a light-receiving element that senses the light output from the light-emitting body and reflected on the surface of the treatment instrument are provided on the insertion side of the drive mechanism, and the drive mechanism is controlled to start and stop based on a signal from the light-receiving element. A control mechanism was installed to
Therefore, not only can the treatment instrument be inserted and removed automatically and quickly by the drive mechanism, but also when it is inserted, it is automatically inserted to the parts where the reflectance of the surface in the longitudinal direction is different. The light-receiving element detects that the reflectance of this part is different from other parts, and the drive mechanism stops based on the detection signal, which prevents the insertion part from protruding too far into the body cavity and puncturing the body cavity. It is extremely useful in practice, as there is no need for dangerous inspections.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, FIG. 2 is a sectional view taken along the line of FIG. 1,
FIG. 3 is a sectional view taken along the line of FIG. 1, and FIG. 4 is an explanatory diagram of the state of use. 1... Main body, 2... Case, 3... Guide tube, 6... Forceps (treatment instrument), 7... Sheath (insertion part), 8... Endoscope, 9... Treatment instrument insertion port, 11
... Drive mechanism, 12 ... Drive roller, 15 ... DC motor, 18 ... Light receiving element, 19 ... Light emitter,
20... Reverse switch, 21... Electronic control circuit (control mechanism).

Claims (1)

[Claims] 1. A treatment instrument having portions with different surface reflectances in the length direction of the insertion portion, a drive mechanism for driving this treatment instrument in both insertion and removal directions with respect to the treatment instrument insertion port of an endoscope, and A light-emitting body provided on the insertion side of the treatment instrument, a light-receiving element that detects the light output from the light-emitting body and reflected on the surface of the treatment instrument, and a signal from the light-receiving element to start and stop the drive mechanism. An endoscope treatment instrument insertion/extraction device comprising a control mechanism.