Intratumoral medical puncture positioning device

Abstract

The application belongs to the technical field of tumor puncture, and specifically provides a tumor internal medicine puncture positioning device, which comprises a sliding rail, a puncture positioner, a first track, a second track and a third track, the lower end of the puncture positioner is slidably connected to the sliding rail, the first track is fixedly connected to one end of the sliding rail, the first track is perpendicular to the sliding rail, the second track is fixedly arranged on the side wall of the puncture positioner, the third track is arranged on the puncture positioner, and the first track, the second track and the third track are perpendicular to each other. The three-dimensional mirror positioning mode is adopted to accurately project the lesion point position in the patient's body to the mirror image point outside the patient's body, the distance from the center of the rotating shaft of the positioning tube to the mirror image point is the same as the distance from the center of the rotating shaft of the positioning tube to the lesion point, so that the puncture needle can accurately reach the lesion point, and the problems that the lesion point of the tumor cannot be directly marked and positioned in the prior art and the puncture depth cannot be accurately determined during three-dimensional oblique puncture are effectively solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tumor puncture, and particularly relates to a tumor internal medicine puncture positioning device. BACKGROUND

[0002] In the tumor diagnosis process, puncture sampling and pathological analysis are often needed, so as to accurately determine the tumor type, and the existing puncture mode is that medical staffs determine the lesion position and puncture path in combination with CT scanning, and determine the puncture point, puncture direction and puncture depth through experience, the puncture mode has great risk, if the puncture path and terminal position are wrong, sampling failure will be caused, and even organs on the puncture path can be infected.

[0003] The puncture positioning technology in the prior art is mostly focused on how to stabilize the position and direction of the puncture needle, and since the tumor lesion is deeply buried in the patient's body and cannot be directly seen by visual observation, whether the terminal of the puncture needle can accurately reach the lesion still needs to be judged in combination with the CT scanning, the tumor lesion point cannot be directly marked and positioned, especially when three-dimensional oblique puncture is performed, the CT scanning is difficult to accurately scan the position of the puncture needle, and it is more difficult to accurately determine the puncture depth. SUMMARY

[0004] In view of the above technical problems, the application provides a tumor internal medicine puncture positioning device, which innovatively adopts a three-dimensional mirror positioning mode to accurately project the position of the lesion point deeply buried in the patient's body to a mirror point outside the patient's body, decomposes the three-dimensional puncture positioning into plane positioning in three directions, the distance from the rotation axis center of the positioning tube to the mirror point is the same as the distance from the rotation axis center of the positioning tube to the lesion point, therefore, the puncture depth and puncture position of the puncture needle tip can be accurately determined, and the puncture needle can accurately reach the lesion point, and the problems that the tumor lesion point cannot be directly marked and positioned in the prior art and the puncture depth cannot be accurately determined when three-dimensional oblique puncture is performed are effectively solved.

[0005] The technical scheme adopted by the present application is as follows: the present application provides a tumor internal medicine puncture positioning device, which comprises a sliding rail, a puncture positioner, a first track, a second track and a third track, the lower end of the puncture positioner is slidably connected to the sliding rail, the first track is fixedly connected to one end of the sliding rail, the first track is perpendicular to the sliding rail, the second track is parallel to the sliding rail, the first track, the second track and the third track are perpendicular to each other, forming a three-dimensional positioning structure, the puncture positioner comprises a base, an electric telescopic rod, a turntable and a positioning tube, the base is slidably connected to the sliding rail, the base portion of the electric telescopic rod is fixedly arranged on the upper wall of the base, the second track is fixedly arranged on the side wall of the base, the third track is fixedly arranged on the side wall of the output portion of the electric telescopic rod, the turntable is frictionally rotatably arranged on the upper wall of the output portion of the electric telescopic rod, the turntable can be horizontally rotated on the upper end of the output portion of the electric telescopic rod, the positioning tube is frictionally rotatably arranged on the turntable, the positioning tube can be vertically rotated on the turntable, the rotation directions of the turntable and the positioning tube are perpendicular, so that multi-directional positioning of the positioning tube can be realized, and the center of the rotation shaft of the positioning tube is located at the intersection of the central cross sections of the first track, the second track and the third track.

[0006] A first bidirectional screw rod is rotatably arranged in the first track, first sliding blocks are symmetrically and slidably connected to the side walls of the first track, the first bidirectional screw rod is threadedly penetrated through the two first sliding blocks, and the two first sliding blocks are respectively located at the left half and the right half of the first bidirectional screw rod, a first motor is fixedly arranged at one end of the first track, the output shaft of the first motor is coaxially and fixedly connected with the first bidirectional screw rod, the first motor can drive the first bidirectional screw rod to rotate, thereby driving the two first sliding blocks to synchronously move close to or away from each other, a first laser level gauge is fixedly arranged on the upper wall of the first sliding block, the light plane emitted by the first laser level gauge is a vertical light plane, and the light plane emitted by the first laser level gauge is perpendicular to the first track, the light planes emitted by the two first laser level gauges are symmetrically distributed with respect to the center of the rotation shaft of the positioning tube, a first distance meter is fixedly arranged in the middle of the side wall of the first track, the first distance meter is an infrared distance meter, the vertical plane where the infrared light emitting end of the first distance meter is located coincides with the middle cross section of the first bidirectional screw rod, a first reflector is fixedly arranged on the side wall of one of the first sliding blocks, the plane where the first reflector is located coincides with the light plane emitted by the corresponding first laser level gauge, the first distance meter is correspondingly arranged on the first sliding block and faces the first reflector, and the first distance meter can measure the distance between the first laser level gauge and the middle cross section of the first bidirectional screw rod.

[0007] The second track and the third track are the same as the first track in structure.

[0008] The second track is provided with a second motor, a second laser level and a second range finder, the second motor is drivingly connected with the second laser level, the light ray plane emitted by the second laser level is in a vertical direction, and the light ray plane emitted by the second laser level is perpendicular to the second track, the light ray planes emitted by the two second laser levels are symmetrically distributed with respect to the rotation shaft center of the positioning tube, the second range finder is fixedly arranged in the middle of the side wall of the second track, the second range finder is an infrared range finder, one side wall of one of the second sliders is fixedly provided with a second reflector, the plane where the second reflector is located coincides with the light ray plane emitted by the corresponding second laser level, and the second range finder faces the second reflector.

[0009] The third track is provided with a third motor, a third laser level and a third range finder, the third motor is drivingly connected with the third laser level, the light ray plane emitted by the third laser level is in a horizontal direction, and the light ray plane emitted by the third laser level is perpendicular to the third track, the light ray planes emitted by the two third laser levels are symmetrically distributed with respect to the rotation shaft center of the positioning tube, the third range finder is fixedly arranged in the middle of the side wall of the third track, the third range finder is an infrared range finder, one side wall of one of the third sliders is fixedly provided with a third reflector, the plane where the third reflector is located coincides with the light ray plane emitted by the corresponding third laser level, and the third range finder faces the third reflector.

[0010] The outer side wall of the positioning tube is fixedly provided with a telescopic positioning rod, the telescopic positioning rod is arranged in the same direction as the positioning tube, the telescopic end portion of the telescopic positioning rod is fixedly provided with a positioning needle, and the end portion of the positioning needle is located on the axis of the positioning tube.

[0011] The side wall of the slide rail is provided with a PLC controller, the second motor and the third motor are electrically connected with the PLC controller, the PLC controller is connected to a computer, and the first range finder, the second range finder and the third range finder are controlled to be connected with the computer.

[0012] The present application has the following beneficial effects:

[0013] (1) The present application adopts a three-dimensional mirror positioning mode to accurately project the position of a lesion point hidden in the body of a patient to a mirror image point outside the body of the patient, and decomposes three-dimensional puncture positioning into plane positioning in three directions, the distance from the rotation shaft center of the positioning tube to the mirror image point is the same as the distance from the rotation shaft center of the positioning tube to the lesion point, therefore, the puncture depth and the puncture position of the tip of a puncture needle can be accurately judged according to the distance from the rotation shaft center of the positioning tube to the mirror image point, and the lesion point can be accurately reached, and the problems that the lesion point of a tumor cannot be directly marked and positioned, and the puncture depth cannot be accurately judged when three-dimensional puncture is performed are solved.

[0014] (2) The first track, the second track and the third track are provided with the laser leveler with mirror image distribution and mirror image movement, so that three-dimensional mirror image light planes can be emitted, and mirror image positioning is realized;

[0015] (3) After the light plane emitted by the first laser leveler is aligned with the lesion point, the puncture direction coordinate data is formed in the form of three-dimensional coordinates, the target distance data of the second range finder and the third range finder can be calculated by combining the distance data measured by the first range finder, so that the positions of the second laser leveler and the third laser leveler can be accurately controlled, and then by adjusting the position of the puncture positioner on the slide rail and the length of the electric telescopic rod, the light planes emitted by the second laser leveler and the third laser leveler can be aligned with the lesion point, so that the lesion point positioning can be realized, and the mirror image point can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure schematic view of a tumor internal medicine puncture positioning device is provided in the present application;

[0017] Figure 2 A structure schematic view of a puncture positioner in the present application;

[0018] Figure 3 A structure schematic view of a first track in the present application;

[0019] Figure 4 A structure schematic view of a second track in the present application;

[0020] Figure 5 A structure schematic view of a third track in the present application;

[0021] Figure 6 A structure schematic view of a rotating disc and a positioning tube in the present application;

[0022] Figure 7 A structure schematic view of a tumor internal medicine puncture positioning device in the present application when emitting light rays in the working stage;

[0023] Figure 8 A front view, a side view and a top view of Figure 7 .

[0024] In the drawings, each mark is explained as follows:

[0025] 1, slide rail, 2, puncture locator, 21, base, 22, electric telescopic rod, 23, turntable, 24, positioning tube, 241, telescopic positioning rod, 242, positioning needle, 10, first track, 101, first bidirectional screw rod, 102, first sliding block, 103, first motor, 104, first laser level, 105, first range finder, 106, first reflector, 20, second track, 201, second bidirectional screw rod, 202, second sliding block, 203, second motor, 204, second laser level, 205, second range finder, 206, second reflector, 30, third track, 301, third bidirectional screw rod, 302, third sliding block, 303, third motor, 304, third laser level, 305, third range finder, 306, third reflector, 4, PLC controller, 6, lesion point, 7, mirror image point;

[0026] wherein, Figure 8 Fig. 1 is a front view of the device of the present application, Fig. 2 is a side view of the device of the present application, and Fig. 3 is a top view of the device of the present application. Figure 7 Fig. 1 is a front view of the device of the present application, Fig. 2 is a side view of the device of the present application, and Fig. 3 is a top view of the device of the present application. Figure 7 Fig. 1 is a front view of the device of the present application, Fig. 2 is a side view of the device of the present application, and Fig. 3 is a top view of the device of the present application. Figure 7 Fig. 1 is a front view of the device of the present application, Fig. 2 is a side view of the device of the present application, and Fig. 3 is a top view of the device of the present application.

[0027] Figure 7 and Figure 8 Fig. 1 is a front view of the device of the present application, Fig. 2 is a side view of the device of the present application, and Fig. 3 is a top view of the device of the present application.

[0028] The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application, and together with the description serve to explain the application, and, to not limit the application. DETAILED DESCRIPTION

[0029] Example 1: Please refer to Figures 1-8The embodiment provides a tumor internal medicine puncture positioning device, which comprises a sliding rail 1, a puncture positioner 2, a first track 10, a second track 20 and a third track 30, the lower end of the puncture positioner 2 is slidably connected to the sliding rail 1, the first track 10 is fixedly connected to one end of the sliding rail 1, the second track 20 is fixedly connected to the puncture positioner 2, the third track 30 is connected to the puncture positioner 2, the first track 10 is perpendicular to the sliding rail 1, the second track 20 is parallel to the sliding rail 1, the first track 10, the second track 20 and the third track 30 are perpendicular to each other, forming a three-dimensional positioning structure, the puncture positioner 2 comprises a base 21, an electric telescopic rod 22, a rotating disc 23 and a positioning tube 24, the base 21 is slidably connected to the sliding rail 1, the base of the electric telescopic rod 22 is fixedly arranged on the upper wall of the base 21, the rotating disc 23 is frictionally rotatably arranged on the upper wall of the output part of the electric telescopic rod 22, the rotating disc 23 can be horizontally rotated on the output part of the electric telescopic rod 22, the positioning tube 24 is frictionally rotatably arranged on the rotating disc 23, the outer side wall of the positioning tube 24 is fixedly provided with a telescopic positioning rod 241, the telescopic positioning rod 241 is arranged in the same direction as the positioning tube 24, the telescopic end part of the telescopic positioning rod 241 is fixedly provided with a positioning needle 242, the end part of the positioning needle 242 is located on the axis of the positioning tube 24, the positioning tube 24 can be vertically rotated on the rotating disc 23, the rotating directions of the rotating disc 23 and the positioning tube 24 are perpendicular, so that the multidirectional positioning of the positioning tube 24 can be realized, the rotation shaft center of the positioning tube 24 is located at the intersection of the central cross sections of the first track 10, the second track 20 and the third track 30, the second track 20 is fixedly arranged on the side wall of the base 21, the third track 30 is fixedly arranged on the side wall of the output part of the electric telescopic rod 22, and the third track 30 is symmetrically provided with two.

[0030] A first bidirectional screw rod 101 is rotatably installed in the first track 10, first sliding blocks 102 are symmetrically and slidably connected to the side walls of the first track 10, the first bidirectional screw rod 101 is threaded through the two first sliding blocks 102, and the two first sliding blocks 102 are respectively located at the left half and the right half of the first bidirectional screw rod 101, the threads of the two halves of the first bidirectional screw rod 101 are opposite in direction, one end of the first track 10 is fixedly installed with a first motor 103, the output shaft of the first motor 103 is coaxially and fixedly connected with the first bidirectional screw rod 101, the first motor 103 can drive the first bidirectional screw rod 101 to rotate, thereby driving the two first sliding blocks 102 to synchronously move close to or away from each other, a first laser level 104 is fixedly arranged on the upper wall of the first sliding block 102, the light emitted by the first laser level 104 is a vertical light plane I, and the light plane I emitted by the first laser level 104 is perpendicular to the first track 10, the light planes I emitted by the two first laser levels 104 are centrally and symmetrically distributed with respect to the rotation axis center of the positioning pipe 24, a first distance meter 105 is fixedly arranged in the middle of the side wall of the first track 10, the first distance meter 105 is an infrared distance meter, the vertical plane where the infrared light emitting end of the first distance meter 105 is located coincides with the middle cross section of the first bidirectional screw rod 101, a first reflector 106 is fixedly arranged on the side wall of one of the first sliding blocks 102, the plane where the first reflector 106 is located coincides with the light plane I emitted by the first laser level 104 corresponding to the first reflector 106, the first distance meter 105 is correspondingly arranged at the first sliding block 102 and faces the first reflector 106, and the first distance meter 105 can measure the distance between the first laser level 104 and the middle cross section of the first bidirectional screw rod 101, i.e., the distance of the rotation axis center of the positioning pipe 24 with respect to the light plane I emitted by the first laser level 104.

[0031] The second track 20 and the third track 30 are identical in structure to the first track 10.

[0032] A second two-way screw rod 201 is rotatably installed in the second track 20, the thread directions of the two halves of the second two-way screw rod 201 are opposite, second sliding blocks 202 are symmetrically and slidingly connected to the side walls of the second track 20, the second two-way screw rod 201 is threaded through the two second sliding blocks 202, a second motor 203 is fixedly installed at one end of the second track 20, the output shaft of the second motor 203 is coaxially and fixedly connected with the second two-way screw rod 201, a second laser level 204 is fixedly arranged on the upper wall of the second sliding block 202, the light emitted by the second laser level 204 is a vertical light plane II, the light plane II emitted by the second laser level 204 is perpendicular to the second track 20, the light planes II emitted by the two second laser levels 204 are centrally and symmetrically distributed with respect to the rotation shaft of the positioning pipe 24, a second distance meter 205 is fixedly arranged in the middle of the side wall of the second track 20, the second distance meter 205 is an infrared distance meter, a second reflector 206 is fixedly arranged on the side wall of one of the second sliding blocks 202, the plane on which the second reflector 206 is located coincides with the light plane II emitted by the corresponding second laser level 204, and the second distance meter 205 faces the second reflector 206.

[0033] A third two-way screw rod 301 is rotatably installed in the third track 30, the thread directions of the two halves of the third two-way screw rod 301 are opposite, third sliding blocks 302 are symmetrically and slidingly connected to the side walls of the third track 30, the third two-way screw rod 301 is threaded through the two third sliding blocks 302, a third motor 303 is fixedly installed at one end of the third track 30, the output shaft of the third motor 303 is coaxially and fixedly connected with the third two-way screw rod 301, a third laser level 304 is fixedly arranged on the side wall of the third sliding block 302, the light emitted by the third laser level 304 is a horizontal light plane III, the light plane III emitted by the third laser level 304 is perpendicular to the third track 30, the light planes III emitted by the two third laser levels 304 are centrally and symmetrically distributed with respect to the rotation shaft of the positioning pipe 24, a third distance meter 305 is fixedly arranged in the middle of the side wall of the third track 30, the third distance meter 305 is an infrared distance meter, a third reflector 306 is fixedly arranged on the side wall of one of the third sliding blocks 302, the plane on which the third reflector 306 is located coincides with the light plane III emitted by the corresponding third laser level 304, and the third distance meter 305 faces the third reflector 306.

[0034] The side wall of the slide rail 1 is provided with a PLC controller 4, the second motor 203 and the third motor 303 are electrically connected with the PLC controller 4 respectively, the PLC controller 4 is connected to a computer, the first distance meter 105, the second distance meter 205 and the third distance meter 305 are controlled to be connected with the computer respectively, in use, first, the first motor 103 is controlled to run, the position of the first laser level 104 is adjusted, so that the vertical light plane I emitted by one of the first laser levels 104 is aligned with the lesion point 6 (positioned according to the CT scanning result), at this time, the first distance meter 105 measures the distance from the first reflector 106, then the puncture direction data is input through the computer, the computer automatically calculates the target distance of the second distance meter 205 and the third distance meter 305 according to the puncture direction and the distance from the first distance meter 105 to the first reflector 106, and the second motor 203 and the third motor 303 are controlled to run through the PLC controller 4, so as to adjust the positions of the second laser level 204 and the third laser level 304, until the distances measured by the second distance meter 205 and the third distance meter 305 are consistent with the target distance, the second motor 203 and the third motor 303 stop running, then the position of the puncture positioner 2 on the slide rail 1 is adjusted, so that the light plane II of one of the second laser levels 204 is aligned with the lesion point 6, and the length of the electric telescopic rod 22 is adjusted, so as to adjust the height of the third track 30, so that the light plane III of one of the third laser levels 304 is aligned with the lesion point 6, so as to realize three-dimensional positioning, since the center of the rotating shaft of the positioning tube 24 is located at the intersection of the central cross sections of the first track 10, the second track 20 and the third track 30, therefore, the light planes emitted by the other group of the first laser level 104, the second laser level 204 and the third laser level 304 also intersect at a point, forming a mirror image point 7, and the mirror image point 7 and the lesion point 6 are symmetrically distributed with respect to the center of the rotating shaft of the positioning tube 24.

[0035] In specific use, the slide rail 1 is first fixedly installed on the side of a puncture lying bed, after the patient lies down, CT scanning is performed to determine the position of the lesion point 6 and the puncture direction (three-dimensional direction), and the puncture direction coordinate data is formed in the form of three-dimensional coordinates.

[0036] The two first laser levels 104 emit two parallel light planes I, the two second laser levels 204 emit two parallel light planes II, and the two third laser levels 304 emit two parallel light planes III.

[0037] Firstly, the first motor 103 is controlled to operate, the first motor 103 drives the first bidirectional screw rod 101 to rotate, drives two first sliders 102 to mirror image movement, thereby adjusts the position of the first laser level 104, and makes the light plane I emitted by one of the first laser levels 104 align with the lesion point 6 (positioned according to the CT scan result), the first distance meter 105 measures the distance between the positioning tube 24 and the center of the rotating shaft of the rotating disc 23 relative to the light plane I emitted by the first laser level 104, and the light plane I emitted by the other first laser level 104 is symmetrically distributed with the light plane I where the lesion point 6 is located.

[0038] Then, the puncture direction coordinate data and the distance data measured by the first distance meter 105 are input into the computer, the computer calculates the target distance data of the second distance meter 205 and the third distance meter 305 according to the puncture direction coordinate data and the distance data measured by the first distance meter 105, and sends the target distance data to the PLC controller 4, the PLC controller 4 starts to control the second motor 203 and the third motor 303 to operate, and the second distance meter 205 and the third distance meter 305 measure the distance in real time.

[0039] The second motor 203 drives the second bidirectional screw rod 201 to rotate, drives two second sliders 202 to mirror image movement, thereby adjusts the position of the second laser level 204, until the distance data measured by the second distance meter 205 reaches the target distance data of the second distance meter 205, the second motor 203 stops operating.

[0040] The third motor 303 drives the third bidirectional screw rod 301 to rotate, drives two third sliders 302 to mirror image movement, thereby adjusts the position of the third laser level 304, until the distance data measured by the third distance meter 305 reaches the target distance data of the third distance meter 305, the third motor 303 stops operating.

[0041] At this time, the position of the puncture positioner 2 on the slide rail 1 is adjusted, so that the light plane II of one of the second laser levels 204 aligns with the lesion point 6, and the length of the electric telescopic rod 22 is adjusted, so that the height of the third track 30 is adjusted, so that the light plane III of one of the third laser levels 304 aligns with the lesion point 6, thereby realizing three-dimensional positioning of the lesion point 6, as shown in Figure 7 and Figure 8 It is the state after three-dimensional positioning.

[0042] Since the center of the rotating shaft of the positioning tube 24 is located at the intersection of the central cross sections of the first track 10, the second track 20 and the third track 30, the light planes emitted by the other set of first laser levels 104, second laser levels 204 and third laser levels 304 also intersect at a point, forming a mirror image point 7 (as shown in Figure 7 and Figure 8The mirror point 7 is symmetrically distributed with the lesion point 6 relative to the rotation axis center of the positioning tube 24, the operator holds the positioning tube 24 to rotate and adjust, the rotating disc 23 rotates horizontally relative to the output wall of the electric telescopic rod 22, the positioning tube 24 rotates vertically relative to the rotating disc 23, until the end of the positioning tube 24 points to the mirror point 7, then the telescopic positioning rod 241 is lengthened, so that the end of the positioning needle 242 coincides with the mirror point 7, thus the self-adjusting and positioning of the device is realized, the axis direction of the positioning tube 24 is the puncture direction, and the mirror point 7 where the end of the positioning needle 242 is located is the mirror position of the lesion point 6 relative to the rotation axis center of the positioning tube 24.

[0043] Finally, the medical staff inserts the puncture needle through the positioning tube 24, points to the puncture point on the surface of the patient's skin, the distance from the rotation axis center of the positioning tube 24 to the mirror point 7 where the end of the positioning needle 242 is located is the same as the distance from the rotation axis center of the positioning tube 24 to the lesion point 6, therefore, the puncture depth and position of the puncture needle tip can be accurately judged according to the distance from the rotation axis center of the positioning tube 24 to the mirror point 7, and the lesion point 6 can be accurately reached.

[0044] In the above puncture process, the tip of the puncture needle can be first aligned with the rotation axis center of the positioning tube 24, and the position of the positioning needle 242 on the puncture needle at this time is marked, then the puncture needle is continuously inserted until the above-mentioned mark position reaches the rotation axis center of the positioning tube 24, which indicates that the tip of the puncture needle reaches the lesion point 6.

[0045] The above describes the present application and its embodiments, which is not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto.

Claims

1. A puncture positioning device for oncology, comprising a slide rail (1) and a puncture locator (2), wherein the lower end of the puncture locator (2) is slidably engaged with the slide rail (1), characterized in that: It also includes a first track (10), a second track (20), and a third track (30). The first track (10) is fixedly connected to one end of the slide rail (1). The puncture locator (2) includes a base (21), an electric telescopic rod (22), a turntable (23), and a positioning tube (24). The base (21) is slidably engaged with the slide rail (1). The base of the electric telescopic rod (22) is fixedly mounted on the upper wall of the base (21). The turntable (23) is rotatably mounted on the upper wall of the output part of the electric telescopic rod (22). The positioning tube (24) is rotatably mounted on the turntable (23). (23) and the rotation direction of the positioning tube (24) are perpendicular. The second track (20) is fixed on the side wall of the base (21). The third track (30) is fixed on the side wall of the output part of the electric telescopic rod (22). The first track (10) is perpendicular to the slide rail (1). The second track (20) is parallel to the slide rail (1). The first track (10), the second track (20) and the third track (30) are perpendicular to each other. The rotation axis center of the positioning tube (24) is located at the intersection of the central cross section of the first track (10), the second track (20) and the third track (30). A first bidirectional lead screw (101) is rotatably installed inside the first track (10). A first slider (102) is symmetrically distributed and slidably engaged on the side wall of the first track (10). The first bidirectional lead screw (101) is threaded through the two first sliders (102). A first laser level (104) is fixedly installed on the upper wall of the first slider (102). The plane of the light emitted by the first laser level (104) is perpendicular to the first track (10). A first distance measuring instrument (105) is fixedly installed in the middle of the side wall of the first track (10). The first distance measuring instrument (105) is correspondingly set with the first slider (102). The structure of the second track (20) and the third track (30) is the same as that of the first track (10); The second track (20) is equipped with a second laser level (204), and the third track (30) is equipped with a third laser level (304). The planes of light emitted by the two first laser levels (104) are symmetrically distributed with respect to the rotation axis center of the positioning tube (24), the planes of light emitted by the two second laser levels (204) are symmetrically distributed with respect to the rotation axis center of the positioning tube (24), and the planes of light emitted by the two third laser levels (304) are symmetrically distributed with respect to the rotation axis center of the positioning tube (24).

2. The oncology puncture positioning device according to claim 1, characterized in that: The first track (10) has a first motor (103) fixedly installed at one end, and the output shaft of the first motor (103) is coaxially fixedly connected to the first bidirectional lead screw (101).

3. The oncology puncture positioning device according to claim 2, characterized in that: The second track (20) is also equipped with a second motor (203) and a second rangefinder (205). The plane of the light emitted by the second laser level (204) is perpendicular to the second track (20). The third track (30) is also equipped with a third motor (303) and a third rangefinder (305). The plane of the light emitted by the third laser level (304) is perpendicular to the third track (30).

4. The oncology puncture positioning device according to claim 3, characterized in that: The slide rail (1) is equipped with a PLC controller (4) on its side wall. The second motor (203) and the third motor (303) are electrically connected to the PLC controller (4) respectively. The PLC controller (4) is connected to a computer. The first rangefinder (105), the second rangefinder (205), and the third rangefinder (305) are connected to the computer control respectively.

5. The oncology puncture positioning device according to claim 4, characterized in that: A telescopic positioning rod (241) is fixedly provided on the outer wall of the positioning tube (24). The telescopic positioning rod (241) is set in the same direction as the positioning tube (24). A positioning pin (242) is fixedly provided at the telescopic end of the telescopic positioning rod (241). The end of the positioning pin (242) is located on the axis of the positioning tube (24).

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