JP2002306489A - Distal end of ultrasonic endoscope for treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distal end of an ultrasonic endoscope for a treatment which enable puncturing thereof into lymphatic folicles located farther from as well as closer to a bronchial paries in safety without deviation from an ultrasonic scanning area. SOLUTION: In the body 2 of the distal end at which is arranged a convex type ultrasonic probe 3 for the sector scanning of the side thereof, a part where at least the ultrasonic probe 3 is arranged is inclined in shape in the direction opposite to the layout position of a port 4 for projecting the treating instrument with respect to the part of the inserting part 1 adjacent to the rear end of the main body 2 of the distal end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end of a medical ultrasonic endoscope which is inserted into a bronchus or the like while performing optical observation and can perform a puncture treatment or the like while observing an ultrasonic tomographic image of a body. About the department.

[0002]

2. Description of the Related Art FIG. 4 shows a distal end portion of a conventional ultrasonic endoscope for treatment. A distal end main body 2 which is directly connected to a distal end portion of an insertion portion 1 is provided with an ultrasonic signal. A convex type ultrasonic probe 3 for performing sector scan on the side of the instrument 2 and a treatment tool insertion passage 5 are arranged.

Then, the side of the tip end body 2 is scanned by an ultrasonic signal transmitted and received from the ultrasonic probe 3,
While locating the lymph node 101 in the ultrasonic scanning range A and observing the ultrasonic tomographic image, the puncture needle 50 protruding from the treatment instrument insertion passage 5 aims at the lymph node 101 existing in the back of the bronchial wall 100. can do.

[0004]

However, the projection direction of the puncture needle 50 protruding from the treatment instrument insertion passage 5 is adjacent to the rear side of the distal end main body 2 due to the relationship with the passage property with respect to the treatment instrument insertion passage 5. It is not possible to make a very large angle with respect to the direction of the axis X of the tip portion of the insertion portion 1 to be formed.

Therefore, as shown in FIG. 4, when the position of the lymph node 101 to be punctured by the puncture needle 50 is slightly away from the bronchial wall 100, it falls out of the ultrasonic scanning range A, and the puncture treatment is performed. It will be difficult.

Accordingly, the present invention provides a distal end of a medical ultrasonic endoscope which can safely perform puncture without deviating from the ultrasonic scanning range of both lymph nodes located near and far from the bronchial wall. The purpose is to provide a part.

[0007]

In order to achieve the above object, the distal end of the ultrasonic treatment endoscope according to the present invention is provided with a distal end body connected to the distal end of the insertion section for optical observation. An observation window, a convex type ultrasonic probe for sector-scanning the side of the distal end body by an ultrasonic signal, and a treatment tool protruding for protruding a treatment tool from behind into an ultrasonic scanning range by the ultrasonic probe. In the distal end portion of the treatment ultrasonic endoscope in which the mouth is disposed, at least a portion of the distal end portion main body where the ultrasonic probe is disposed has a shape inclined in a direction opposite to the disposed position of the treatment instrument protrusion port. It is formed.

It is preferable that the portion of the distal end body where the ultrasonic probe is disposed is inclined by 5 ° to 30 ° with respect to the insertion portion adjacent to the rear end of the distal end body.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a portion near the distal end of the insertion section of the ultrasonic treatment endoscope. A range of about several cm at the distal end of the flexible tubular insertion section 1 is indicated by a not-shown hand-side operation section. The bending portion 1a bends by remote operation from the user.

A convex type ultrasonic probe 3 for sector-scanning the side of the distal end body 2 by an ultrasonic signal is provided at a portion near the distal end of the distal end body 2 connected to the distal end portion of the curved portion 1a. Are located.

[0013] A treatment tool projection port 4 which is an exit of the treatment tool insertion passage 5 is opened on a slope formed in the distal end main body 2 adjacent to the rear side of the ultrasonic probe 3. 3 allows the treatment tool to protrude from the rear within the ultrasonic scanning range.

In the present invention, the distal end body 2 is tilted in the direction opposite to the position where the treatment instrument outlet 4 is disposed with respect to the axis X of the insertion portion 1 adjacent to the rear end of the distal end body 2. ing. The tip inclination angle θ is about 10 ° in this embodiment.

FIG. 3 is an external view of the ultrasonic probe 3 as viewed from the front. An observing window 6 for optical observation and an illumination window 7 are provided on a slope adjacent to the rear side of the ultrasonic probe 3. It is arranged alongside the protrusion 4.

FIG. 1 shows a state in which a puncture needle 50 protruding from a treatment tool outlet 4 is aimed at a lymph node 101 located in the back of a bronchial wall 100 to perform a puncture treatment such as injection of a drug solution. ing.

The treatment instrument insertion passage 5 has a treatment instrument insertion channel 5 made of a flexible tube inserted through the insertion portion 1.
a of the connecting pipe 5b fixed to the tip end body 2
The connection pipe 5b has a radius of curvature through which the puncture needle 50 can pass without forcing,
It is smoothly bent so that it protrudes at an angle as much as possible.

The transmitting / receiving section of the ultrasonic probe 3 is formed in an arc shape having a radius of about 1 cm, for example.
It is set to a range of about 0 °.

By using the medical treatment endoscope of the embodiment configured as described above, the ultrasonic scanning range A is deflected forward by the tip inclination angle θ of the tip main body 2. As a result, the lymph node 1 located considerably deeper than the bronchial wall 100
01 also falls within the ultrasonic scanning range A, and the lymph node 101 can be safely aimed at with the puncture needle 50 while checking the ultrasonic tomographic image.

It is possible to deviate the ultrasonic scanning range A forward even if the distal end main body 2 is arranged straight with respect to the axis X of the distal end portion of the insertion section 1. It is inevitable that the distal end main body 2 becomes thick, and the pain given to the patient increases.

The present invention is not limited to the above-described embodiment. For example, the tip inclination angle θ may be in the range of about 5 ° to 30 °, and the entire tip end body 2 must be inclined. However, it is sufficient that at least the portion where the ultrasonic probe 3 is disposed is inclined.

[0020]

According to the present invention, the distal end main body portion on which the convex type ultrasonic probe for performing sector scanning on the side is disposed is inclined in the direction opposite to the position where the treatment tool outlet is disposed. Because the ultrasonic scanning direction is deflected forward by forming it into a shape, lymph nodes located near and far from the bronchial wall can be moved out of the ultrasonic scanning range without thickening the tip main body. Puncture can be performed safely without coming off.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view of a distal end portion of a treatment ultrasonic endoscope according to an embodiment of the present invention in a puncture treatment state.

FIG. 2 is a side view of a portion near the distal end of the insertion section of the ultrasonic treatment endoscope according to the embodiment of the present invention.

FIG. 3 is an external view of the ultrasonic probe at the distal end of the ultrasonic treatment endoscope according to the embodiment of the present invention as viewed from the front.

FIG. 4 is a side cross-sectional view of a distal end portion of a conventional treatment ultrasonic endoscope in a puncture treatment state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insertion part 2 Main part of a front-end | tip part 3 Ultrasonic probe 4 Treatment tool outlet 50 Puncture needle (theta) Tip inclination angle

Claims (2)

[Claims] 1. A distal end body connected to a distal end of an insertion portion,
An observation window for optical observation, a convex type ultrasonic probe for sector-scanning the side of the distal end body by an ultrasonic signal, and a treatment tool from the rear within the ultrasonic scanning range by the ultrasonic probe. In the distal end portion of the treatment ultrasonic endoscope in which the treatment tool projection port for projecting is disposed, at least a portion of the distal end body where the ultrasonic probe is disposed, the disposition position of the treatment tool projection port. A distal end portion of the ultrasonic treatment endoscope, wherein the distal end portion is formed in a shape inclined in a direction opposite to a direction opposite to the endoscope. 2. A portion of the distal end body where the ultrasonic probe is disposed is inclined by 5 ° to 30 ° with respect to a portion of the insertion portion adjacent to a rear end of the distal end body. 2. A distal end portion of the ultrasonic treatment endoscope according to 1.