JP2002360577A - Tip part of ultrasonic endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tip part of an ultrasonic endoscope by which safety treatment can be carried out by catching a treatment tool projecting from a treatment tool projection port into an ultrasonic scanning area even when the treatment tool is curved to a side and projects from the treatment tool projection port. SOLUTION: At the tip part of the ultrasonic endoscope where a balloon 4 which is expansible and reducible in the state of surrounding an ultrasonic probe 3 and the treatment tool projection port 13 for making the treatment tool 100 project from a rear side into the ultrasonic scanning area U by the probe 3 are arranged, the probe 3 can be rotated around a center axis Y in the same direction as the axis of a tip part main body 2 from the hand side of an insertion part 1 independent of the balloon 4 and the port 13.

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 an ultrasonic endoscope in which an observation window for optical observation and an ultrasonic probe are provided at the distal end of an insertion portion.

[0002]

2. Description of the Related Art FIG. 6 shows a distal end of a conventional ultrasonic endoscope. A sector scan is performed laterally on a front half 2a of a distal end main body 2 disposed at a distal end of an insertion section 1. FIG. A convex type ultrasonic probe 3 is arranged, and a balloon 4 that is inflated by injecting degassed water or the like is attached around the front half 2a.

An observing window 11 and an illuminating window 12 are arranged side by side on a slope 10 formed on the rear half 2b of the distal end body 2, and a treatment tool for projecting the treatment tool 100 is arranged next to the observation window 11. The protrusion 13 is provided. Reference numeral 14 denotes a treatment instrument raising piece.

[0004]

At the distal end of the ultrasonic endoscope constructed as described above, a treatment such as an endoscope injection tool or a drainage tube projecting from the treatment tool outlet 13 is provided. The tip of the tool 100 may be bent and protruded to the side as shown in FIG. 6 due to the bending habit.

[0005] Then, the treatment tool 100 is moved to the ultrasonic probe 3.
As a result, the treatment tool 100 can hardly be captured in the ultrasonic tomographic image, and the puncture treatment, the indwelling treatment and the like cannot be performed safely.

Accordingly, the present invention provides a method for safely treating a treatment tool projecting from a treatment tool projection port in an ultrasonic scanning area even when the treatment tool projects sideways from the treatment tool projection port. It is an object of the present invention to provide a distal end portion of an ultrasonic endoscope capable of performing the above.

[0007]

To achieve the above object, the distal end of the ultrasonic endoscope according to the present invention is provided with an observation window for optical observation at a distal end main body connected to the distal end of the insertion section. When,
A convex type ultrasonic probe for scanning the side of the distal end body by ultrasonic signals, a balloon that can expand and contract around the ultrasonic probe, and an ultrasonic probe from the rear within the ultrasonic scanning area At the distal end of the ultrasonic endoscope in which the treatment tool ejection port for projecting the treatment instrument is disposed, the ultrasonic probe is independently attached to the balloon and the treatment instrument ejection port from the proximal side of the insertion section. The tip can be rotated about a central axis in the same direction as the axis of the main body.

[0008]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 shows a distal end portion of the insertion portion of the ultrasonic endoscope. The front end portion 2a of the distal end portion main body 2 connected to the distal end of the elongated flexible tubular insertion portion 1 has a sector on the side. Convex type ultrasonic probe 3 for scanning
Is arranged. 4 is an inflatable balloon and 100 is a treatment tool.

[0009] The front half 2a of the tip body 2 is positioned with respect to the rear half 2b behind the boundary 2c with the rear half 2b.
As shown by an arrow B, the balloon 4 is rotatable around a central axis Y in the same direction as the axis of the distal end body 2.
It does not rotate because it is attached to the rear half 2b of the tip body 2.

FIG. 4 is a plan view of the distal end portion of the ultrasonic endoscope. Here, a state in which the front half 2a of the distal end body 2 has been rotated to a certain extent laterally from the front is shown. 5 is
An O-ring that attaches the balloon 4 to the distal end body 2.

An observation window 11 and an illumination window 1 are provided on a slope 10 formed obliquely forward on the rear half portion 2b of the distal end body 2.
2 are arranged side by side, and within the treatment tool protrusion 13 formed side by side, the protrusion direction (however, up and down direction) of the treatment tool 100 protruding from the treatment tool protrusion 13 is controlled. For this purpose, a treatment instrument raising piece 14 that is remotely operated via a raising piece operation wire 15 is provided.

FIGS. 1 and 2 show a front half 2 of a tip body 2.
1A and 1B are a side sectional view and a plan partial sectional view of a distal end portion of an ultrasonic endoscope including a rotation mechanism for rotating a, and as shown in FIG. A signal cable 6 for transmitting signals input / output to / from the ultrasonic probe 3 is passed through. Reference numeral 16 denotes a treatment instrument passage tube.

Near the front end of the rear half portion 2b of the front end body 2, a gear 20 for transmitting a rotational motion while changing its direction vertically, such as a bevel gear, rotates around a rotation axis X. It is freely disposed and is pivotally supported by the rear half 2b of the distal end body 2.

A probe rotation operation wire 21 that is pushed and pulled by a remote operation from an operation unit (not shown) connected to the base end of the insertion portion 1 is directly connected to the gear 20, and the probe rotation operation wire 21 is connected to the gear 20. The gear 20 is rotated by the axial movement of.

The front half 2a and the rear half 2 of the tip body 2
b is rotatably connected around a center axis Y in the same direction as the axis of the distal end body 2, and an O-ring 8 for sealing is mounted on the rotation fitting surface.

On the other hand, on the rear end surface of the front half portion 2a of the front end body 2, bevel teeth 7 meshing with teeth of the gear 20 are formed. Reference numeral 9 denotes a water supply / drain opening opening at the position inside the balloon 4 on the outer surface of the rear half portion 2b of the distal end portion main body 2.

With such a configuration, the gear 20 is rotated by operating the probe rotation operation wire 21 from the operation portion connected to the base end of the insertion portion 1, whereby the tip end on which the ultrasonic probe 3 is disposed. The front half 2a of the main body 2 rotates, and the ultrasonic scanning direction rotates around the central axis Y.

Then, as shown in FIG. 4, the observation window 11 and the treatment tool outlet 13 arranged on the rear half 2b side of the distal end body 2 are, of course, the rear half 2b by the O-ring 5. The balloon 4 attached to the side does not rotate,
The ultrasonic probe 3 rotates within the balloon 4 independently of them.

Therefore, only the ultrasonic scanning area U has the center axis Y in the same direction as the axis of the distal end body 2 without changing the attitude of the distal end of the ultrasonic endoscope inserted into the body.
4, even if the distal end portion of the treatment tool 100 protruding from the treatment tool outlet 13 is bent laterally, as shown in FIG. , And can be observed as an ultrasonic tomographic image, and a procedure such as puncturing or placement can be performed safely and easily.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG.
Since it is only necessary to open the inside of the balloon 4, it may be arranged on the front half 2 a side of the distal end body 2.

[0021]

According to the present invention, the ultrasonic probe is rotated about the central axis in the same direction as the axis of the distal end body from the proximal side of the insertion portion independently of the balloon and the treatment tool outlet. Even if a treatment tool is bent to the side and protrudes from the treatment tool outlet, the posture of the distal end of the ultrasonic endoscope inserted into the body can be completely changed. In addition, it is possible to perform treatment safely by catching the treatment tools protruding from the treatment tool protrusion port at an arbitrary position in the ultrasonic scanning area.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a distal end portion of an ultrasonic endoscope according to a first embodiment of the present invention.

FIG. 2 is a plan partial cross-sectional view of a distal end portion of the ultrasonic endoscope according to the first embodiment of the present invention.

FIG. 3 is a side view of a distal end portion of the ultrasonic endoscope according to the first embodiment of the present invention.

FIG. 4 is a plan view of a distal end portion of the ultrasonic endoscope according to the first embodiment of the present invention.

FIG. 5 is a plan partial sectional view of a distal end portion of an ultrasonic endoscope according to a second embodiment of the present invention.

FIG. 6 is a plan view of a distal end portion of a conventional ultrasonic endoscope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insertion part 2 Front-end | tip main body 2a Front half part 2b Rear half part 3 Ultrasonic probe 4 Balloon 7 Bevel tooth 11 Observation window 13 Treatment tool protrusion 20 Gear 21 Probe rotation operation wire 100 Treatment tool U Ultrasonic scanning area X Rotation axis Y center axis

Claims (1)

[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, a balloon which can be expanded and contracted in a state surrounding the ultrasonic probe, and At the distal end of an ultrasonic endoscope in which a treatment tool projection port for projecting the treatment tool from behind into an ultrasonic scanning region by an ultrasonic probe, the ultrasonic probe is used to connect the balloon and the treatment tool. Independently with respect to the protrusion, the ultrasonic endoscope is characterized in that it can be rotated from the proximal side of the insertion section around a central axis in the same direction as the axis of the distal end body. Tip.