JPS6317450Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a treatment instrument such as a biological tissue collection forceps for collecting tissue inside a living body cavity, that is, the inner wall of the stomach, duodenum, etc., or a contrast agent injection tube for injecting a contrast agent into the pancreatic and bile ducts, etc. The present invention relates to a lifting device for an endoscopic treatment instrument that is provided in an endoscope to lift up an endoscopic treatment instrument.

Diagnosis using an endoscope includes not only observation and diagnosis of diseased areas within body cavities, but also examination of tissues collected with biological tissue collection forceps using a channel for inserting treatment instruments attached to the endoscope. Diagnosis, or X-ray diagnosis performed by injecting a contrast medium into the pancreaticobiliary duct using a contrast medium injection tube.

As an endoscope for this purpose, as shown in Figure 1,
The opening 3 of the insertion channel 2 through which the treatment instrument 1 protrudes is arranged in series with the observation window 4, that is, in the axial direction of the distal end 5 of the endoscope, and the raising member 7 housed in the groove 6 is inserted into the wire. There is a device in which the treatment instrument 1 is raised by swinging the treatment instrument 1 through operations such as the above. In such an endoscope, since the swinging surface of the treatment instrument 1 is on the center line of the observation field of view, the tip of the treatment instrument 1 always moves on the center line of the observation field of view. It is easy to position the tip of the treatment instrument 1 in the center of the observation field. However, because such an endoscope has the opening 3 and the observation window 4 in series,
The length of the distal end 5 of the endoscope becomes long, which causes great pain to the patient when the endoscope is inserted into a body cavity.In addition, in a narrow lumen such as the duodenal bulb, the distal end 5 touches the inner wall of the lumen. There was a problem that the inside of the lumen could not be sufficiently observed and diagnosed due to contact with the lumen.

Therefore, as shown in FIG. 3, it has been considered to arrange the opening 3 in parallel with the observation window 4, that is, on substantially the same circumference of the distal end 5 of the endoscope. Since the distal end 5 of such an endoscope is short, the pain caused to the patient when inserting the endoscope is reduced, and the distal end 5 comes into contact with the inner wall of the lumen even during observation and diagnosis in a narrow lumen. Satisfactory results can be obtained without any hassle.

However, in such an endoscope, the optical axis of the observation window 4 and the swing plane of the treatment instrument 1 are parallel, and the swing plane of the treatment instrument 1 is offset from the center of the observation field. Furthermore, as can be seen from FIG. 3, there is a problem in that the tip of the treatment instrument 1 is always away from the center of the observation field of view, making it difficult to operate the treatment instrument 1 such as collecting tissue.

In order to solve this problem, a structure has been developed in which the tip of the treatment instrument 1 is positioned in the center of the observation field by tilting the swinging surface of the treatment instrument 1 with respect to the optical axis of the observation window 4. This was proposed in Publication No. 53-1832. However, with this type of endoscope,
Since the members of the observation optical system and the groove 6 or the raising member 7 are not parallel, it is difficult to arrange each member within the distal end portion 5 of the endoscope, resulting in an increase in dead space. Therefore, the space that can be effectively used in the distal end 5 is reduced, and the channel 2 for inserting the treatment instrument must be made smaller in diameter. The problem is that it has to be used. In addition, if some members or grooves 6 are provided at an angle, machining of the tip portion 5 is difficult and finishing accuracy tends to be reduced.

In addition, even if the groove 6 is tilted with respect to the optical axis of the observation window 4, depending on the type of treatment instrument 1, the inside of the groove 6 may be diagonally crossed due to its rigidity, and it may not be aligned with the optical axis of the observation window 4. Sometimes they protruded in parallel.

The present invention was made in order to solve the above-mentioned problem, and includes a raising member 7 for protruding the treatment instrument 1.
To provide a lifting device for an endoscopic treatment instrument, which is capable of positioning the distal end of the treatment instrument 1 in the center of the observation field even though the operating surface of the instrument 1 is provided parallel to the optical axis of the observation window 4. It is.

Hereinafter, according to the preferred embodiment shown in the attached drawings,
The present invention will be explained in detail.

Fig. 4 is a partially cutaway perspective view showing an embodiment of the present invention, Fig. 5 is a cross-sectional front view showing the same embodiment, and Fig. 6 is a plan view showing the same embodiment with a part of the raising member cut away. It is. In this embodiment, the opening 3 through which the treatment tool 1 projects and the observation window 4 are provided in parallel, that is, on substantially the same circumference of the endoscope's distal end 5. A raising member 7 for raising the treatment instrument 1 and a groove 6 for accommodating the raising member 7 are provided parallel to the optical axis of the observation window 4, and are connected to the operating section (not shown) of the endoscope. An operating member 8 for swinging the raising member 7, such as an operating wire connecting the upper member 7 or a rod connecting the operating wire and the raising member 7, is inserted into the observation window 4 of the groove 6.
A raising member 7 is placed in the groove 6 along the side wall opposite to the
is inserted into the groove 6 at a position where it comes into contact with the operating member 8 and is inclined in the optical axis direction of the observation window 4, and is fitted with the raising member 7 at a notch 9 provided on the side surface of the raising member 7. There is.

In addition, in FIGS. 4 to 6, 10 is a lighting window;
11 is a prism for observation, and 13 is an optical fiber bundle for illumination.

In the present embodiment, as shown in FIG. protrude outside. At this time, when the treatment instrument 1 is raised, the treatment instrument 1 comes into contact with the insertion channel 2 at the apex M of the tube wall at the end of the insertion channel 2 by the raising member 7 . As described above, the operating member 8 that swings the raising member 7
is inserted into the groove 6 along the side wall opposite to the observation window 4, so that when the treatment instrument 1 is raised up as shown in FIG. It is possible to make contact with the operating member 8, change its protruding direction toward the observation window 4, protrude at an angle toward the optical axis direction of the observation window 4, and position its tip at the center of the observation field.

In this embodiment, the groove 6 and the member 7 are provided parallel to the optical axis of the observation window 4, so that the dead space in the tip 5 is small and the workability of the tip 5 is good. As shown in Fig. 7, when the groove 6 is provided parallel to the optical axis of the observation window 4 (shown by the broken line) and when it is provided at an angle (shown by the solid line), if the external shape of the tip 5 of the endoscope is the same, the former case allows the insertion channel 2 and the rising member 7 to be made larger. Therefore, the former case adopted in this device has the advantage that not only can a treatment tool 1 with a larger diameter be used, but also that secretions, blood, etc. in the body cavity can be sucked from between the treatment tool 1 and the insertion channel 2 even when the treatment tool 1 is inserted.

According to the lifting device according to the present invention, since the opening 3 and the observation window 4 are provided in parallel, the distal end 5 is short, causing less pain to the patient when inserting the endoscope.
It also has good operability in narrow lumens.

Furthermore, by inserting the operating member 8 that swings the raising member 7 into the groove 6 along the side wall opposite to the observation window 4, the treatment instrument 1 is tilted in the optical axis direction of the observation window 4. Since the distal end of the treatment instrument 1 can be positioned in the center of the observation field of view, there is an advantage that tissue sampling, contrast medium injection, etc. can be easily and accurately performed with the treatment instrument 1. .

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view showing a conventional lifting device, Fig. 2 is a projection view showing an image of the treatment tool within the observation field of the conventional example shown in Fig. 1, and Fig. 3 is another conventional example. 4 is a partially cutaway perspective view of an embodiment of the present invention; FIG. 5 is a transverse front view of the embodiment; and FIG. 6 is a partially cutaway plan view of the embodiment. FIG. 7 is a cross-sectional front view comparing the case where the groove 6 is provided parallel to the optical axis of the observation window 4 (shown by broken line) and the case where it is provided at an angle (shown by solid line). 1...Treatment instrument, 2...Insertion channel, 3...
... opening, 4 ... observation window, 5 ... tip of endoscope, 6 ... groove, 7 ... raising member, 8 ... operation member.

Claims (1)

[Scope of utility model registration request] An opening 3 provided in parallel with the observation window 4 provided in the distal end portion 5, and a groove 6 that is connected to this opening 3 and accommodates a lifting member 7 for lifting the treatment instrument 1.
and an operating member 8 for operating the raising member 7 that is pivotally supported at one end,
The operating surface of the raising member 7 that operates within the groove 6 is made parallel to the optical axis of the observation window 4, and the operating member 8 is connected to a notch 9 formed in a part of the outer surface of the raising member 7. Therefore, the operating member 8, which is in direct pressure contact with the treatment instrument 1 from the side, is configured to bias and protrude the treatment instrument 1 toward the observation window 4 in response to the raising operation of the raising member 7, depending on the depth of the notch 9. Lifting device for treatment instruments.