JPH06105847A - Endoscope - Google Patents

Abstract

PURPOSE:To obtain an endoscope wherein a treatment by using a penetrating needle can be accurately performed by positioning an ultrasonic transmitting and receiving means, a guiding outlet and an observative optical window on the same straight line in the long direction of an organism inserting part. CONSTITUTION:An ultrasonic oscillator 20 wherein an ultrasonic transmitting and receiving face 20a is faced in the side face direction is mounted on an apex constitutional part 16 of an inserting part 14 fixed on an endoscope 10 and is connected to an ultrasonic transmitting and receiving instrument through a signal cable. In addition, an observative optical window 22 is provided on the apex constitutional part 16 and is positioned closer to the operational part 12 at hand than the ultrasonic oscillator 20 and the center 22a is positioned on the central axial line 23 in the long direction of the inserting part of the ultrasonic oscillator 20. Furthermore, a guiding outlet 24 is positioned on the operational part 12 side at hand being closer than the observative optical window 22 and the center 24a is positioned on the central axial line 23 of the ultrasonic oscillator 20 and the observative optical window 22. Therefore, the center of an ultrasonic tomograph and the guiding direction of a penetrating needle 26 coincides with the image center observed from the observative optical window.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope, and more particularly to an endoscope having an ultrasonic wave transmitting / receiving means, a puncture needle outlet, and a puncture needle observation optical window at a distal end portion of a living body inserting portion. .

[0002]

2. Description of the Related Art Conventionally, an ultrasonic transmitting / receiving means, an outlet of a puncture needle, and an observation optical window of the puncture needle are arranged in the distal end portion of an endoscope to diagnose or treat a lesion in a living body. Doing endoscopes are known. For example, Japanese Patent Application No. 63-25296
In the endoscope disclosed in Japanese Patent No. 1, the ultrasonic transmission / reception unit is attached to the side, the outlet is arranged closer to the hand operation unit side than the ultrasonic transmission / reception unit, and the observation optical window is further provided. Is placed laterally away from the diagnostic center line of the ultrasonic transmitting and receiving means, and while visually observing the body wall and the puncture needle through the observation optical window, the ultrasonic tomographic image obtained by the ultrasonic transmitting and receiving means is used as a basis. The treatment with a puncture needle is performed.

[0003]

However, the endoscope disclosed in Japanese Patent Application No. 63-252961 has an ultrasonic tomographic image center and a puncture needle with respect to the image center observed through the observation optical window. Since the derivation direction is deviated, the treatment must be performed while observing the puncture needle from an oblique direction. Therefore, there is a drawback that treatment with a puncture needle is difficult.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an endoscope which facilitates accurate treatment with a puncture needle.

[0005]

In order to achieve the above-mentioned object, the present invention provides an ultrasonic wave transmitting / receiving means, and an outlet through which a puncture needle can be freely pierced in the direction to be inspected by the ultrasonic wave transmitting / receiving means. In an endoscope equipped with an observation optical window for observing the puncture needle drawn out from the outlet, the ultrasonic transmitting / receiving means, the outlet, and the observation optical window, It is characterized in that they are arranged on the same line in the longitudinal direction of the living body inserting section.

[0006]

According to the present invention, the ultrasonic wave transmitting / receiving means, the outlet,
And since the observation optical window is arranged on the same line in the longitudinal direction of the living body inserting portion, at the center of the image observed from the observation optical window,
The center of the ultrasonic tomographic image coincides with the derivation direction of the puncture needle.
This allows the puncture needle to be visually observed from the front, which facilitates accurate treatment with the puncture needle.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of an endoscope according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is an overall view showing an embodiment of an endoscope 10 according to the present invention. This endoscope 10
An elongated insertion portion 14 to be inserted into a living body cavity is connected to the hand operation portion 12, and a tip forming portion 16 is attached to a tip portion of the insertion portion 14. A universal cord 18 to be connected to a light source device (not shown) is attached to the hand operation unit 12.

As shown in FIGS. 2 and 3, an ultrasonic transducer 20 having an ultrasonic wave transmitting / receiving surface 20a oriented in the side direction is mounted on the tip forming section 16. The ultrasonic transducer 20
Is an electronic scanning type oscillator having a scanning direction in the axial direction of the insertion portion 14. In addition, this ultrasonic transducer 20
It is connected to the ultrasonic transmitter / receiver via a signal cable (not shown) inserted into the insertion portion 14. This ultrasonic transmitter / receiver is connected to a display for displaying a tomographic image under the wall of the body cavity obtained by the ultrasonic transducer 20.

An observation optical window 22 is provided in the tip forming section 16.
Are placed. The observation optical window 22 is disposed closer to the hand operation unit 12 side than the ultrasonic oscillator 20, and its center 22a is located on the central axis 23 in the longitudinal direction of the insertion portion of the ultrasonic oscillator 20. Has been done. The observation optical window 22 has a field of view in the direction of the ultrasonic transducer 20 to be inspected, and is arranged at a position where a puncture needle 26 led out from an outlet 24 described later can be taken within the field of view. . In addition, the illumination lights 2 are provided on both sides of the observation optical window 22.
8, 28 are arranged.

The above-mentioned outlet 24 is arranged closer to the hand operating section 12 than the observation optical window 22 and has its center 2
4a is the central axis 2 of the ultrasonic transducer 20 and the observation optical window 22.
Located on the 3rd. Further, a puncture needle 26 for diagnosing or treating a lesion in the living body is provided at the outlet 24 so as to be freely projectable. The puncture needle 26 is rotated by rotating the operation knob 30 of the hand operation unit 12 shown in FIG.
The lead-out amount, the tilt angle, and the like are adjusted via an operation wire (not shown).

Next, the operation of the endoscope 10 configured as described above will be described. First, while inserting the insertion portion 14 into the body cavity and performing visual observation through the observation optical window 22,
The tip forming part 16 is moved to the diagnosis / treatment site in the body cavity, and the ultrasonic transmission / reception surface 22a of the ultrasonic transducer 20 is brought into close contact with the surface of the diagnosis / treatment site. Next, the ultrasonic transducer 20 is driven to perform ultrasonic scanning by the ultrasonic transducer 20, and an ultrasonic tomographic image within the scanning range is displayed based on the ultrasonic echo received by the ultrasonic transducer 20. To display.

Next, when a diagnosis or treatment site is found in the tomographic image, the operation knob 3 is provided so that the puncture needle 26 can be drawn out from the lead-out port 24 at a protrusion angle corresponding to the depth of this part.
By operating 0, the puncture needle 26 is pierced into the body wall. Then, the ultrasonic tomographic image and the puncture needle 2 displayed in this tomographic image
While observing the image of 6 on the display, the puncture needle 26 is appropriately moved to start treatment with the puncture needle 26.

At this time, in this embodiment, the ultrasonic transducer 2
0, the observation optical window 22, and the center of the outlet 24 are arranged on the same axis 23, so that the center of the ultrasonic tomographic image and the puncture needle 2 are located at the image center observed through the observation optical window 22.
The derivation direction of 6 matches. Accordingly, in this embodiment, the puncture needle 26 can be visually observed from the front through the observation optical window 22, so that the treatment with the puncture needle 26 can be performed more accurately as compared with a conventional endoscope that observes the puncture needle from an oblique direction. It will be easier to do.

In this embodiment, the ultrasonic transducer 20, the observation optical window 22, and the outlet 24 are arranged in this order from the tip of the tip forming portion 16 toward the hand-side operating portion 12, but the arrangement is not limited to this. For example, as shown in FIG. 4, the ultrasonic transducer 20, the outlet 24, and the observation optical window 22 may be arranged in this order.

[0015]

As described above, according to the endoscope of the present invention, the ultrasonic transmitter / receiver, the outlet, and the observation optical window are arranged on the same line in the longitudinal direction of the living body inserting portion, and the observation optical system is provided. Since the center of the ultrasonic tomographic image and the derivation direction of the puncture needle are aligned with the image center observed through the window, the puncture needle can be visually observed from the front. This facilitates accurate treatment with the puncture needle.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of an endoscope according to the present invention.

FIG. 2 is a perspective view showing a distal end constituent portion of the endoscope according to the present invention.

FIG. 3 is a top view of a tip forming portion of the endoscope according to the present invention.

FIG. 4 is a perspective view showing another embodiment of the endoscope according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Endoscope 12 ... Hand operation part 16 ... Tip configuration part 20 ... Ultrasonic transducer 22 ... Observation optical window 24 ... Outlet port 26 ... Puncture needle

Claims (1)

[Claims] 1. An ultrasonic wave transmitting / receiving means, a lead-out port through which the puncture needle is freely pierced in a direction to be inspected by the ultrasonic wave transmitting / receiving means, and an observation optical window for observing the puncture needle led out from the lead-out port. In the endoscope having a distal end portion of the living body inserting portion, the ultrasonic transmitting / receiving means, the outlet, and the observation optical window are arranged on the same line in the longitudinal direction of the living body inserting portion. And an endoscope.