JPS6121094B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ultrasonic endoscopic puncture device, and more particularly to an improved ultrasonic endoscopic puncture device that can accurately set the puncture position of a puncture needle.

An endoscopy tube is inserted into the body cavity of the subject, and an ultrasonic beam is emitted from an ultrasonic transducer installed at the tip of the endoscope tube toward a desired organ within the subject, and biological tissues are detected from the reflected echoes. Ultrasonic endoscopic devices for observing the images are well known. In particular, recent endoscopic ultrasound systems that use electronic scanning ultrasound transducers are capable of observing living tissue in real time, and because the ultrasound transducers are inserted into body cavities, they are capable of observing deep parts of the subject. Since it can display even living tissue as a clear tomographic image, it is used for various diagnoses, and devices that insert ultrasonic transducers into the rectum, urethra, vagina, etc. are widely put into practical use.

On the other hand, a puncture method is also well known in which a puncture needle is inserted into the subject to collect the desired biological tissue or other tissue for various purposes such as collecting organs or affected areas of the subject, and provides accurate diagnostic information. It is extremely effective for treatment and other purposes.

However, since this puncture causes pain to the subject, it is important to correctly achieve the desired purpose in a single puncture in as short a time as possible.To this end, conventionally, various ultrasound devices and The puncture operation was performed while observing the desired biological tissue and the condition of the puncture needle using a combination of ultrasonic tomographic images.

However, in many conventional ultrasonic puncture devices, the ultrasound device and the puncture device are formed separately, and although the insertion state of the puncture needle can be observed, the relative insertion position of the puncture needle remains unclear to the examiner. The disadvantage is that it requires skill and often requires re-puncture.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide an improved system that integrates an ultrasound endoscopic device and a puncture device, and further allows the insertion position of a puncture needle to be set accurately and easily. An object of the present invention is to provide an ultrasonic endoscopic puncture device.

In order to achieve the above object, the present invention provides an endoscopic tube that is provided with an electronic scanning ultrasonic transducer at its tip and is inserted into the body cavity of a subject, and a transducer that is inserted into the body cavity of a subject. A slidable slider,
The apparatus is characterized in that it includes a puncture needle that is movable along a puncture needle guide provided on the slider in parallel to the cylinder axis of the endoscopic tube.

Preferred embodiments of the present invention will be described below based on the drawings.

1 and 2 show a preferred embodiment of the ultrasonic endoscopic puncture device according to the present invention.

An endoscope tube 12 is fixedly held at one end of the handle 10 so as to be slidable in the axial direction.
A half-moon-shaped sliding groove 10 provided at one end of the handle 10
The internal viewing tube 12 is sandwiched between a and a half-moon-shaped sliding groove 14a formed in a stop plate 14 screwed to the handle 10, and the stop plate 14 is tightened to the handle 10 with a set screw 16. The fixed position of the endoscopic tube 12 is arbitrarily adjusted. A scale 12a is provided on the surface of the endoscopic tube 12, so that the insertion depth of the endoscopic tube 12 into the body cavity can be read, and at the same time, information on the length of the puncture needle can be provided.

An electronic scanning ultrasonic transducer 18 is built into the tip of the endoscope tube 12, and an ultrasonic beam 100 is emitted from its radiation surface 18a. It consists of a structure in which radiation is emitted from the vibrator 18. A rubber bag 20 is placed over the tip of the endoscope tube 12 containing the ultrasonic transducer 18 as needed. It is held fixed at 12. and,
A water injection pipe 24 passing through the interior of the endoscope tube 12 supplies a medium, such as water, having almost the same ultrasonic propagation characteristics as the object to be examined into the rubber bag 20, and the medium can be drained as necessary. It is discharged from the pipe 26 to the outside.
However, covering the end of the endoscopic tube with a rubber bag is secondary, and there are cases where the rubber bag may not be necessary.

In FIG. 1, the endoscope tube 12 is shown inserted into a body cavity 28a such as the rectum of a subject 28, and a living tissue 30 in the vicinity of the body cavity 28a is punctured.

A recessed guide 10b is provided on the surface of the handle 10, and a slider 32 is slidably provided along the guide 10b in a direction substantially perpendicular to the cylinder axis of the endoscopic tube 12. That is, the slider 32 is provided with a long groove 32a, and a slider set screw 34 that engages with the long groove 32a is screwed to the handle 10, so that when the slider 32 is slid to an arbitrary position with respect to the handle 10, By tightening and fixing the slider set screw 34, the slider 32 can be fixed at a desired position.

A puncture needle guide 36 is fixed to the tip of the slider 32, and in the embodiment, the puncture needle guide 36 is attached to a holder 38 screwed to the slider 32.
is fixed.

In the embodiment, the puncture needle guide 36 has a prismatic shape, with guide grooves 36 having different widths on each side.
a, 36b, 36c, and 36d are formed, and the puncture needle 40 is inserted into the guide groove 36a that opens upward, and in the embodiment, the puncture needle 40 is guided along the guide groove 36a. It can be slid in the direction. The puncture needle guide 36 can be attached to the holder 38 in any direction, and as a result, each guide groove 36a, 36
b, 36c, and 36d are arranged in a position facing upward, so that various puncture needles 40 with different diameters can be inserted into the puncture needle guide 36 depending on the groove width.
It can be installed in a manner that is compatible with the Further, a puncture needle holder 42 is rotatably supported on the holder 38 by a shaft 44, and the puncture needle holder 42 is constantly pressed and urged counterclockwise in FIG. 2 by a biasing spring 46. Therefore, the presser piece 42a of the puncture needle presser 42 holds the puncture needle 4 inserted into the guide groove 36a.
0 from the guide groove 36a, and an appropriate frictional force is applied to the puncture needle 40 by the biasing force of the puncture needle holder 42.

In the present invention, the guide grooves 36a, 36b, 36c, and 36d of the puncture needle guide 36 are
Since the puncture needle 4 is provided parallel to the cylinder axis of
0 can move parallel to the endoscope tube 12.
Therefore, the distance between the endoscopic tube 12 and the puncture needle 40 at the position of the handle 10 is equal to the distance between the tip of the puncture needle 40 inserted into the subject 28 and the endoscopic tube 12, and This has the advantage that setting the insertion position is extremely easy. In the embodiment, a scale 32b is provided on the surface of the slider 32, so that the distance between the cylinder axis of the endoscopic tube 12 and the puncture needle 40 can be easily read.

A preferred embodiment of the present invention has the above configuration,
The effect will be explained below.

The endoscope tube 12 has a rubber bag 2 attached to its tip as necessary.
0 is inserted into the body cavity 28a of the subject 28, and after the insertion is completed, the rubber bag 20 is filled with water from the water injection pipe 24. As a result, the endoscopic tube 1
The air between the ultrasound transducer 18 at the tip of the ultrasound transducer 2 and the body cavity 28a is removed, and image deterioration can be prevented. In this state, an electronically scanned excitation signal is supplied to the ultrasonic transducer 18 from the outside,
The linear scanning ultrasound beam 100 is transmitted to the biological tissue 30 of the subject 28 by the electronic scanning of the ultrasound transducer 18.
It is radiated towards. Therefore, as is well known,
It becomes possible to display a tomographic image of the biological tissue 30 on a display unit such as a cathode ray tube.

On the other hand, in the puncture needle guide 36 of the slider 32,
A puncture needle 40 of a desired shape and diameter is attached, and while observing the tomographic image, the distance between the cylinder axis of the endoscopic tube 12 and the part of the living tissue that requires puncturing is measured from the image, and The fixed position of the slider 32 relative to the handle 10 is set based on the measured value. That is, in the present invention, since the cylinder axis of the endoscopic tube 12 and the puncture needle 40 maintain a parallel relationship, the insertion position of the puncture needle 40 can be set in advance from the position on the image before insertion. becomes possible. By tightening the slider set screw 34, the slider 3
2 is fixed, the puncture needle 40 slides along the puncture needle guide 36 and attaches to the living body 28.
As shown in FIG. 1, the tip reaches the biological tissue 30 that requires puncturing.

Therefore, according to the present invention, the insertion position of the puncture needle 40 can be set in advance at a predetermined and accurate position, and the purpose can be achieved accurately and easily with a single puncture operation. has advantages.

As mentioned above, when replacing the puncture needle 40, insert the puncture needle guide 36 into any guide groove 36a,
It is sufficient to change the direction of the puncture needle guide 36 so that 36b, 36c, and 36d are positioned upward, and this direction change is achieved by rotating the puncture needle holder 42 around the shaft 44 against the biasing spring 46. Therefore, it is easily done.

As explained above, according to the present invention, since the puncture needle 40 moves parallel to the endoscopic tube 12, the puncture position can be accurately set in advance from the measured value of the tomographic image, and the puncture needle 40 can be accurately set. A puncturing operation can be performed, and in the present invention, the movement of the slider 32 is controlled by a movement amount detector, for example a potentiometer, provided between the endoscope tube 12 and the slider 32, in the embodiment, inside the handle 10. It is also possible to electrically detect the position of the puncture needle 40 using a meter or the like and to electrically display the position of the puncture needle 40 on the screen of a cathode ray tube based on this detection signal. The position of the puncture needle 40 with respect to the ultrasound transducer 18 detected by the slider movement amount detector such as the potentiometer can be displayed as a cursor 50 in the ultrasound image 200. The position changes depending on the fixed position of the slider 32, and if the slider 32 is moved relative to the handle 10 so that the cursor 50 matches the biological tissue that requires the desired puncture in advance, the puncture position can be set even more accurately. becomes possible.

As described above, the present invention has the advantage that it is possible to provide an improved ultrasonic endoscopic puncture device that can accurately set the insertion position of a puncture needle and that does not cause puncture errors.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a preferred embodiment of the ultrasonic endoscopic puncture device according to the present invention during a puncturing operation, FIG. 2 is a cross-sectional view of the main part of the device shown in FIG. 1, and FIG. 3 is a diagram according to the present invention. FIG. 3 is an explanatory diagram showing an ultrasound tomographic image using a cursor. 12... Endoscope tube, 18... Electronic scanning ultrasound transducer, 28... Subject, 28a... Body cavity, 32...
...Slider, 36...Puncture needle guide, 40...Puncture needle, 50...Cursor, 100...Ultrasonic beam.

Claims (1)

[Scope of Claims] 1. An endoscopic tube that is provided with an electronic scanning ultrasonic transducer at its tip and inserted into the body cavity of a subject, and that is slidable in a direction substantially perpendicular to the cylinder axis of the endoscopic tube. An ultrasonic endoscopic puncture device comprising: a slider provided on the slider; and a puncture needle movable in parallel to a cylinder axis of an endoscopic tube along a puncture needle guide provided on the slider. 2. In the device according to claim 1, a slider movement amount detector is provided between the endoscope tube and the slider, and the puncture needle position detected by the movement amount detector is displayed as a cursor on the electronic scanning screen. An ultrasonic endoscopic puncture device characterized by displaying: