JPS6253181B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises an ultrasound probe for puncture having a guide slit for a cannula, and a display that displays a tomographic image obtained based on the operation of the probe on a screen. The present invention relates to an ultrasonic diagnostic device equipped with the above-mentioned ultrasonic diagnostic equipment.

It is known to remove tissue or fluid from internal organs of the body, such as the liver or kidneys, for diagnostic purposes with a suitable puncture cannula. Similarly, during pregnancy, for the same purpose, for example, amniotic fluid can be removed from the uterus, or blood or drugs, for example, can be injected into the body of the fetus.

In all these cases, it is necessary to avoid unnecessary injury to dangerous areas, such as the placenta in the case of uterine puncture, or to avoid accidentally removing tissue from undesired body areas or to prevent incorrect injections during injection. It is very important to know the exact location of the puncture cannula relative to the organ or blood vessel to be punctured in order to avoid injury.

Recently, for this purpose, a method has been used in which an ultrasonic puncture probe having a guide slit for the cannula is used, and puncturing is performed while observing a real-time image on a display.
The shape of the guide slit in this probe is designed to widen the range that can be punctured and to make it easier to see the tip of the cannula on the image displayed on the display. It is formed to have an inverted triangular cross section. The use of such a probe eliminates the inaccuracy of conventional punctures based on the doctor's intuition or the contact scan method, and allows for safer punctures while simultaneously checking the movement of the puncture target and cannula on the display. can be done. Therefore, compared to previous methods, this method has various advantages such as a higher accuracy rate, a reduction in the average number of punctures per patient, and the ability to perform pancreatic duct punctures, etc., which were previously considered impossible.

However, even if the tip of the cannula becomes visible in the image using the above method, the cannula itself is originally made of a highly rigid material, so if the initial puncture direction is set incorrectly, Of course, the needle will come off the object to be punctured, and the needle must be punctured again. In addition, the range that can be punctured is limited by the angle of the guide slit provided on the probe, and even though it is absolutely impossible to puncture objects located outside that range, it is difficult to puncture objects many times. There is also the problem of not realizing the truth until you try it. This problem is caused by the fact that the setting of the puncturing direction is done by analogy with the position of the object appearing on the image, which inevitably results in inaccuracy. In addition, the increased number of punctures due to such inaccurate punctures may damage other normal tissues,
This increases the mental burden on the patient.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide an ultrasonic diagnostic apparatus that can accurately recognize the position of an object on an image displayed on a display and perform reliable puncture. For this purpose, a large number of ultrasonic transducer elements are arranged at least sequentially on the surface that contacts the body, and a guide for the cannula is provided that has an inverted triangular cross section from the center of the contact surface toward the other side. In an ultrasonic diagnostic apparatus consisting of an ultrasonic probe for puncture having a slit and a display for displaying a tomographic image obtained based on the operation of the probe, a transparent plate is provided to cover the display surface. Then, on the surface of the transparent plate, a center line extending in the depth direction of the screen and a radial area extending from the starting point of the center line in the depth direction of the screen at the same angle as the apex angle of the inverted triangle of the guide slit are defined. It is characterized by forming two straight lines and a plurality of curved lines that extend concentrically in the depth direction at equal intervals around the starting point, and whose lengths gradually increase corresponding to the radial areas. It is something to do.

The present invention will be specifically explained below using Examples.

FIG. 1 is a cross-sectional view showing an example of an ultrasonic puncture probe used in carrying out the present invention, and FIG. 2 is a front view showing an example of a display for displaying a tomographic image obtained by the operation of the probe. It is a diagram. In the figure, reference numeral 1 denotes a support for the ultrasonic probe, which is formed into a substantially rectangular parallelepiped shape. A large number of ultrasonic transducing elements 2, 2, . . . are arranged in a row on the bottom surface of the support 1 (which becomes the surface that comes into contact with the body). Further, a guide slit 3 having an inverted triangular cross section is formed from the center of the support 1 toward the upper side. The angle θ of the apex of the triangle of this slit 3 is set to approximately 30 degrees. 4 is a cannula inserted into this guide slit 3. Reference numeral 5 denotes a cable for electrically connecting the probe 2 to an external processing device (not shown). 6 is the body, and 7 is a tissue part within the body. Reference numeral 8 denotes a display, and 9a and 9b indicate limit lines of an area where a tomographic image obtained based on the operation of the probe is displayed. Reference numeral 10 denotes a transparent plate fixed to the display by an adhesive or other appropriate means so as to cover the display area. A mark having a shape corresponding to the shape of the guide slit 3 formed in the support 1 of the probe is provided on the transparent plate 10. That is,
A center line 11 drawn in the depth direction of the screen (direction from top to bottom in the figure), and two straight lines 12a that define a radiation area that expands downward from the starting point 11a of the center line 11. , 12b, and a plurality of curved lines 13, 13, . . . extending concentrically downward at equal intervals around the starting point 11a are drawn. The plurality of curves 13 are drawn so that the lengths of the curves 13 gradually increase in correspondence with the radial regions. The angle formed by the two straight lines 12a and 12b defining the radial region is set to be the same as the apex angle θ of the guide slit 3 in the probe support 1. Moreover, the transparent plate 1
Marking on 0 is performed by drawing or printing using Magic Ink (trade name).

The device having such a configuration is used in the following manner. That is, first, the probe is arranged so that the ultrasonic transducer element 2 provided on the contact surface contacts the surface of the body 6, and then the transducer elements are sequentially driven to generate a tomographic image of the body 6 through a predetermined processing circuit. The image is displayed on 8 displays. At this time, the tissue 7 to be punctured within the body 6 is displayed as 7' on the display 8. By observing this displayed image, it is determined whether or not the tissue image 7' is included within the mark on the transparent plate 10, that is, whether it is located within the range that can be punctured by the cannula (straight lines 12a and 1).
2b). If it is confirmed that the position is within the range, the angle from the starting point 11a of the center line 11 is detected visually or by an appropriate method. At the same time, the tissue image 7' is also created in relation to the curves 13, 13 that concentrically spread downward at equal intervals.
It is also detected how deep the point is located from the starting point 11a. After that, the cannula 4 is inserted from above the guide slit 3 of the probe support 1, the tip of the cannula 4 is punctured into the body 6 according to the angle and depth confirmed in the image, and the tissue 7 is taken out. , or inject a medical solution or the like into the tissue 7. If the probe is once brought into contact with the surface of the body 6 and the image is observed, if the tissue 7 to be punctured is located outside the punctureable area, the probe is moved so that the tissue 7 is located below the center. The cannula may be inserted vertically as shown by dashed line 4'. Furthermore, if a diagnosis is being made in which the probe placed in contact with the probe cannot be moved, puncturing will be abandoned.

According to the apparatus of the present invention as described in detail above, the position to be punctured (the cannula insertion angle and depth) can be accurately recognized by the mark on the transparent plate 10 disposed on the display 8. In particular, a radial area with an angle corresponding to the cannula guide slit and a concentric curve whose length gradually increases corresponding to the radial area are provided, making it possible to accurately position the cannula and set the angle. . Therefore, accurate punctures can be performed at all times, and the number of punctures can be reduced to the minimum necessary. Therefore, the conventional problems of damaging other normal tissues and increasing the patient's mental burden due to unnecessary puncturing are solved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of the structure of an ultrasound probe used in the device of the present invention, and FIG. 2 is a display for displaying a tomographic image obtained based on the operation of the ultrasound probe. It is a front view showing an example. DESCRIPTION OF SYMBOLS 1...Probe support, 2...Ultrasonic conversion element, 3...Guide slit, 4...Cannula, 5
...Cable, 6...Body, 7...Tissue, 8...
Display, 9a, 9b... Image border line, 10
...Transparent plate, 11...Center line, 12a, 12b...
...Radial area demarcation line, 3...Concentric circular line.

Claims (1)

[Claims] 1. A puncture ultrasonic device in which a large number of ultrasonic transducing elements are arranged at least sequentially on a surface that contacts the body, and a guide slit for a cannula that has an inverted triangular cross section from the center of the contact surface toward the other side. In an ultrasonic diagnostic apparatus comprising a sonic probe and a display for displaying a tomographic image obtained based on the operation of the probe, a transparent plate is disposed to cover the display surface, and the transparent plate surface a centerline extending in the depth direction of the screen, two straight lines defining a radial region extending from the starting point of the centerline in the depth direction of the screen at the same angle as the apex angle of the inverted triangle of the guide slit; An ultrasonic diagnostic apparatus characterized in that a plurality of curves are formed concentrically extending in the depth direction at equal intervals around a starting point, and whose lengths gradually increase in correspondence with the radial region.