JPS58133227A - Endoscopic ultrasonic diagnostic apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Conventional ultrasound diagnostic devices are mainly designed for diagnosis from outside the body. There is a limit.

For this reason, an internal ultrasonic diagnostic device that attempts to diagnose the disease from inside the body has been developed and used, and its use is attracting attention.

Hereinafter, the configuration of a conventional ultrasonic diagnostic apparatus used in the past is shown in FIG. 1, and the structure of an ultrasonic transducer is shown in FIG. 2.

In Figure 1, 1 is a synchronous oscillation circuit, 2 is an excitation circuit, and 3 is a synchronous oscillation circuit.
4 is an endoscope, 4 is a scanning mechanism, 5 is a function generation circuit, 6 is a cathode ray tube, 7 is an amplifier circuit, and 8 is a brightness modulation circuit.

The pulse output of the synchronous oscillation circuit 1 is converted into a high-frequency pulse and a pulse with a steep rise by an excitation circuit 2 for generating ultrasonic pulses, and then passes through the inner hole of the endoscope 3 and is installed in the scanning mechanism 4. applied to the oscillator. On the other hand, the output of the synchronous oscillation circuit 1 passes through the inner hole of the endoscope 3, as shown in FIG.

The ultrasonic waves emitted from the vibrator can scan the inside of the body by applying them to a pulse motor and electrically controlling forward and reverse rotation.

The electrical signals transmitted to the scanning mechanism 4 and the vibrator are passed through the inner hole of the inner 4MH3, thereby smoothing the insertion of the endoscope 3 into the body. In order to display an image that matches the direction of the ultrasonic waves emitted into the body from the transducer installed in the scanning rock 4, the pulse output of the synchronous oscillation circuit 1 is converted into a waveform by the function generation circuit 5, and then transmitted to the X of the cathode ray tube 6. The propagation direction of the ultrasonic waves applied to the Y voltage is displayed as an image. Ultrasonic waves reflected from abnormal tissues in the body are amplified by an amplifier circuit 7 and then transmitted to a brightness modulation circuit 8.
After that, the image is displayed on the cathode ray tube 6 as a cross-section image.

FIG. 2 shows an embodiment of a mechanical scanning system for the vibrator 15 in this device. 3 is an endoscope.

9 is an autopsy window, 10 is an inner hole, and 11 is a pulse motor.

12 is a micro gearhead, 13 is a co-rotating shaft, 14 is a damper, 15 is a vibrator, 16 is a pulse motor drive line, 17
18 is an excitation line of the vibrator 15, 18 is a rotating shaft support plate, and 2-point button line 19 is a case.

The outputs of the synchronous oscillation circuit and the excitation circuit in FIG. The pulse motor 11 is fixed at the endoscope 31ct, rotates at an angle corresponding to the number of output pulses of the synchronous oscillation circuit 1 shown in FIG. 1, and is decelerated to a minute rotation angle by the micro gear head 12. The rotational force of the microhead 12 is transmitted to the damper 14 by the rotating shaft 13, and as the damper 14 rotates, ultrasonic waves are radiated into the body from the vibrator 15 bonded to the damper 14.

An endoscope configured as described above is inserted into the body.

The diagnosis site is determined by visual inspection through the autopsy window, and this can be easily done by placing an ultrasonic transducer in close contact with the body. In this state, ultrasonic waves are emitted.

Ultrasound waves propagate into the body without attenuation, allowing for clear images.

However, it is extremely difficult to insert the transducer into the body and bring the transducer surface from which ultrasonic waves are emitted into close contact with the autopsy site on the inner wall of the stomach, for example, by operating from outside the body. That's true.

A commonly used method to solve this problem is to wrap the outside of the vibrator part of the ultrasound device with a balloon 20 as shown in FIG. The balloon 20 is inflated by injecting a propagating medium 21%, such as water or olive oil, to bring the balloon 20 into close contact with the stomach wall 21'. When the ultrasonic wave tj is emitted from the holder 15 in this state, the ultrasonic wave propagates within the medium 21, reaches the stomach wall, further propagates into the body, and then the reflected sound wave inside the body passes through the medium 21 again. and returns to the vibrator 15.

The congratulatory ultrasonic device having such a configuration has the following problems. That is, one of the problems is that the amount of attenuation of the ultrasonic waves while reciprocating within the medium is large, which hinders the creation of clear images.

Second, multiple reflections of the emitted ultrasonic waves occur between the wall of the balloon 20 and the transducer 15, which also poses a problem in obtaining a clear image.

The present invention has been made to solve the above problems, and is characterized in that the ultrasonic radiator can be brought into close contact with the autopsy site. Use the diagram below.

The details of the present invention will be described.

FIG. 4(a) shows the configuration of an embodiment of the present invention. FIG. 4(b) is a loaf surface view taken along line A-A,' of FIG. 4(a).

In the figure, a feature is that a plurality of tentacles 22 made of shape memory material are attached to the back of the case 3 of the ultrasonic wave emitting unit.

To give an overview of shape memory materials here, Tl-Ni, A
u-Cd, Cu-Z nkA alloy 1d has the effect of remembering its shape before deformation even if it is deformed, and returning to its original shape when heated a little. The temperature difference at which this deformation begins is said to be 15 to 17 C in the Cu-Zn-A system.

This shape change is characterized by being reversible.

The tentacle 22 made of shape memory material has a shape as shown in FIG. FIG. 5 (→ shows the folded state of the tentacle 22, and FIG. 5(b) shows the state of the tentacle 22 after deformation. In FIG. 5(a), the tentacle 22 is in close contact with the case 3. , so that it can be inserted into the entire case 3 without any problems such as bumps.

After the tentacle 22 is inserted into the body and reaches a predetermined autopsy site, the tentacle 22 is deformed as shown in FIG. 5(b) by heating the heater 23 wrapped around the tentacle 22. When the heating is stopped, the tentacles 22 are returned to their original shape by the force of the spring 24 and become as shown in FIG. 5(a). In addition, 23
' is a conductor for heating.

As described above, the shape of the tentacles 22 inside a human body can be changed by controlling the current flowing to the heater 23 from outside the body.As shown in FIG. , by operating the tentacles 22,
Vibrator 15 of the ultrasonic generator housed in case 3
Since it is pressed against the tracheal wall 26, the ultrasonic waves can be efficiently propagated into the body.

The provision of a plurality of tentacles 22 means that, as shown in FIG.
This is because by increasing the number of points supporting the case 3, it can be stably supported.

As mentioned above, by providing multiple tentacles made of shape memory material on the side of the internal bell, it is possible to bring the ultrasonic wave emitting part into close contact with the autopsy site, and a clear image can be obtained. There are some notable ones.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams showing the configuration and details of the ultrasonic generation part of a conventional ultrasound device for family celebrations, Figure 3 is a diagram showing the state of the conventional equipment during autopsy, and Figures 4 and 5 are diagrams showing details of the ultrasound generating part. FIG. 6 is a diagram showing one embodiment of the present invention, and FIG. 6 is a diagram showing another embodiment of the present invention. Agent Patent Attorney Toshiyuki Usuda 1st (2) 2nd Leap 3rd ¥ 41 ¥1 (α) 82 (8) 2 Shoulder 5 (α) A (b) 15 j 6th Shiro

Claims (1)

[Claims] In an ultrasonic diagnostic device that includes an endoscope and means for operating the endoscope at different positions, there is a support made of a plurality of elastic materials on the back of the ultrasonic generator. An ultrasonic diagnostic device for congratulations on marriage, characterized by having a section.