A CT-guided puncture-assisted orientation device

Abstract

This utility model belongs to the technical field of CT-guided puncture auxiliary devices, specifically a CT-guided puncture auxiliary orientation device. It solves the technical problem of large orientation accuracy errors in existing auxiliary orientation devices. It includes a first connecting block, a second connecting block, a marker plate, a spirit level base, a protractor pointer, a protractor, and a backing plate. Multiple needle grooves are provided on the front side of the backing plate. The backing plate and the first connecting block are integrally connected via a connecting rod, and a handle is connected to the backing plate. Compared with existing auxiliary orientation devices, the auxiliary orientation device of this utility model can achieve precise orientation. Its structure is simple and ingenious, and it is convenient and flexible to operate. It can accurately guide the needle insertion direction during puncture, saving surgical time, avoiding side effects caused by excessive radiation dose, reducing the probability of complications, and greatly alleviating patient suffering. Therefore, this utility model can be widely used in CT and MRI-guided interventional examinations, diagnoses, and treatments, and has high practical value.

Description

Technical Field

[0001] This utility model belongs to the technical field of CT-guided puncture auxiliary devices, and particularly relates to a CT-guided puncture auxiliary orientation device. Background Technology

[0002] CT-guided interventional examinations and treatments are highly valuable due to their precise positioning, high safety, low complication rate, high diagnostic accuracy, and good therapeutic effects. While CT-guided punctures allow for precise location and measurement of the internal target, external puncture point, puncture angle, and depth from CT scan images, determining the needle insertion direction during puncture is challenging. Often, multiple attempts are required to find the optimal direction, leading to longer procedures, higher radiation doses, more complications, and greater patient discomfort, which in turn affects the accuracy of the examination and the effectiveness of the treatment. Patent No. 201810584252.1 discloses a CT / MRI-guided puncture auxiliary orientation device. However, the three-dimensional space in which the level bubble rotates is not coordinated or aligned with the three-dimensional space in which the puncture needle rotates, resulting in significant positioning errors. Therefore, improvements are needed to enhance the overall positioning accuracy of the auxiliary positioning device. Utility Model Content

[0003] To overcome the technical shortcomings of existing CT and MRI-guided puncture auxiliary orientation devices, which have large errors in orientation accuracy, this utility model provides a CT-guided puncture auxiliary orientation device.

[0004] This utility model provides a CT-guided puncture auxiliary orientation device, including a first connecting block, a second connecting block, a marker plate, a bubble level base, a protractor pointer, a protractor, and a backing plate; the protractor has a rectangular slot at its center, and angle scale lines are provided on the front side wall of the protractor; the protractor pointer includes an integrally formed pointer support arm and a pointer head, and the protractor pointer is adapted to the protractor; the first connecting block has a first shaft hole running through its front and rear, and a first rotating shaft is fitted into the first shaft hole with clearance; a rectangular locking block adapted to the rectangular slot of the protractor is fixedly connected to the front end of the first rotating shaft. The rear end of the rotating shaft is fixedly connected to the side wall of the marking plate. The top of the marking plate is provided with a first marking line parallel to the axis of the first shaft hole, and the top of the first connecting block is provided with a second marking line. The first connecting block is also threaded with a first set screw that can abut against the first rotating shaft. The top of the first connecting block is provided with a first slot that matches the pointer support arm. When the protractor is installed on the rectangular block of the first rotating shaft, the protractor pointer is inserted into the first slot, and the protractor pointer is located at the 0 mark of the protractor, the first marking line and the second marking line on the top of the marking plate are on the same straight line. The second connecting block has second shaft holes running through its left and right sides. A second rotating shaft is fitted into these holes with a clearance fit. The left end of the second rotating shaft is fixedly connected to a rectangular locking block that matches the rectangular slot of the protractor. The right end of the second rotating shaft is fixedly connected to the side wall of the bubble level base. The second connecting block also has a threaded second set screw that can abut against the second rotating shaft. The top of the second connecting block has a second slot that matches the pointer support arm. The top of the bubble level base has a bubble level cylindrical slot and four laser line aiming points. The four laser line aiming points are evenly distributed along the circumference of the bubble level cylindrical slot. The top of the two connecting blocks is provided with a third marking line parallel to the axis of the second shaft hole; when the protractor is installed on the rectangular block of the second rotating shaft, the protractor pointer is inserted into the second slot and the protractor pointer is located at the 0 mark of the protractor, the third marking line and the two opposing laser aiming points are on the same straight line; a connecting arm extends forward on the second connecting block, and a locking block that engages with the connecting arm extends from the marking plate; multiple sets of needle grooves are provided on the front side of the back plate, and the left side of the back plate is integrally connected to the right side of the first connecting block by a connecting rod, and a handle is connected to the rear side of the back plate.

[0005] In the CT-guided puncture auxiliary orientation device described in this utility model, the second rotating shaft and the bubble level base are fixedly connected. The second rotating shaft and the protractor are fixedly engaged through a rectangular locking block and a rectangular slot on the protractor. When the protractor is installed on the rectangular locking block of the second rotating shaft, rotating the protractor will cause the bubble level base to rotate synchronously. The first rotating shaft and the marker plate are fixedly connected, and the first rotating shaft and the protractor are fixedly engaged through a rectangular locking block and a rectangular slot on the protractor. When the protractor rotates a certain angle, the first connecting block remains stationary, but the marker plate rotates synchronously with the first rotating shaft. The rotation of the marker plate will cause the rigidly connected second connecting block to rotate a certain angle. When the first rotating shaft needs to be fixed relative to the first connecting block, the first set screw is rotated towards the first rotating shaft to abut. Similarly, when the second rotating shaft needs to be fixed relative to the second connecting block, the second set screw is rotated towards the second rotating shaft to abut. Specifically, the connecting rod is L-shaped, with one end connected to the front right side of the first connecting block, and the abutment plate located on the right side of the other end of the connecting rod. The connecting rod bends backward as a whole. After the connecting rod connects the first connecting block and the back plate, the back plate is located to the right rear of the first connecting block, and the first connecting block, the connecting rod, and the back plate are all located in the same horizontal plane. The pointer support arm of the protractor is inserted into the first slot or the second slot. The pointer head is set at the top of the pointer support arm and the tip of the pointer head can extend to the plane where the angle scale line of the protractor is located. There are gaps between the pointer head and the pointer support arm and the protractor (23) to facilitate the rotation of the protractor. The rear end of the first rotating shaft is integrally formed with the side wall of the marking plate. The right end of the second rotating shaft is integrally formed with the side wall of the bubble level base.

[0006] The operation process of the CT-guided puncture auxiliary orientation device described in this utility model during CT-guided puncture is as follows: Step 1, Preparation of other auxiliary devices: ① Place the level laser light and the gantry laser light orientation registration plate (patent number ZL201920192703.7) on the CT scanning bed, adjust the plate to be level, draw a straight line on the surface of the plate along the longitudinal laser line of the CT machine, and then move the plate out with the scanning bed; ② The tripod center column is perpendicular to the horizontal plane, the pan-tilt head is perpendicular to the pitch axis, and the level laser line is parallel to the tripod center column and parallel to the straight line drawn on the aforementioned registration plate along the longitudinal laser line of the CT gantry; Step 2: Scan the relevant parts of the patient with a CT scanner. Based on the purpose of the examination or treatment, determine the target point in the image displayed by the CT scanner, select a suitable needle insertion route, determine the optimal puncture point on the body surface, and measure the angle α between the oblique axis plane where the needle insertion route is located and the standard axis plane, the angle β between the needle insertion route and the anterior and posterior midline in the oblique axis plane, the distance d1 between the optimal puncture point on the body surface and the standard cross section where the special positioning marker on the body surface is located, the distance d2 between the optimal puncture point on the body surface and the special positioning marker on the body surface in the sagittal plane, and the distance d3 from the target point to the optimal puncture point on the body surface. Mark the optimal puncture point position on the body surface based on the distances d1 and d2. Step 3: The doctor sterilizes the area, puts on sterile gloves, drapes a sterile drape, exposes the best puncture point on the body surface, disinfects the area, and administers local anesthesia. Step 4: Aseptically remove the sterilized CT-guided puncture auxiliary orientation device of this utility model. First, tightly fit the protractor with the rectangular block of the second rotating shaft connected to the bubble level base through the rectangular slot in its center. Tightly fit the lower part of the pointer support arm with the second slot. Rotate the protractor so that the protractor pointer points to the scale line corresponding to -α. Fix the second rotating shaft with the second set screw. Then remove the protractor and tightly fit the protractor with the rectangular block of the first rotating shaft connected to the marker plate through the rectangular slot in its center. Tightly fit the lower part of the pointer support arm with the first slot. Rotate the protractor so that the protractor pointer points to the scale line corresponding to -β. Fix the first rotating shaft with the first set screw. Then remove the protractor and the protractor pointer. Step 5: The surgeon holds the handle and presses the puncture needle into the needle groove near the plate, placing the needle tip at the optimal puncture point. The direction of the needle tail is adjusted until the spirit level is level. The assistant adjusts the telescopic boom so that the longitudinal laser line of the level at the distal end of the boom approaches the spirit level. Simultaneously, the surgeon adjusts the spirit level's orientation so that the line connecting the longitudinal markers around the spirit level is parallel to the longitudinal laser line; this is the target puncture direction. The surgeon uses one hand to hold the position of the CT-guided puncture auxiliary orientation device in place, and the other hand pushes the puncture needle inward along the needle groove to the predetermined depth. The surgeon then releases their fingers to remove the CT-guided puncture auxiliary orientation device.

[0007] Preferably, a first marking line is provided at the bottom of the marking plate, and the first marking line at the bottom of the marking plate corresponds to the first marking line at the top of the marking plate, both being parallel to the axis of the first shaft hole. Rotating the marking plate 180° so that the second connecting block is rotated to the right side of the marking plate will bring the level bubble closer to the plate, making it easier to observe the level of the level bubble during puncture.

[0008] Preferably, the first set screw is installed on the left side of the first connecting block, and the first set screw includes a connected threaded rod and a rotating handle; the second set screw is installed on the rear side of the second connecting block, and the second set screw also includes a connected threaded rod and a rotating handle. This arrangement is more reasonable and makes it more convenient to rotate the first or second set screw.

[0009] Preferably, the multiple sets of needle grooves on the support plate are adapted to puncture needles of different diameters. The diameters of the needle grooves on the support plate are also different, thus adapting to puncture needles of different diameters.

[0010] Preferably, the first, second, and third marker lines, as well as the laser aiming point, all protrude from their respective planes. The first, second, and third marker lines are all raised lines, and the laser aiming point is a raised block. This arrangement makes alignment easier when needed.

[0011] Preferably, the first slot is located at the top of the first connecting block near the front edge, and the second slot is located at the top of the second connecting block near the left edge. This arrangement is structurally sound.

[0012] Preferably, the first connecting block, the second connecting block, and the level bubble base are all cuboid structures, while the marker plate and the backing plate are rectangular plate structures. The area of ​​the rear sidewall of the first connecting block is equal to the area of ​​the marker plate surface. This arrangement is structurally sound.

[0013] Preferably, the outer walls of the handle, the rotating handle of the first setter screw, and the rotating handle of the second setter screw are respectively provided with anti-slip silicone layers. This design prevents slippage when rotating the handle, the rotating handle of the first setter screw, or the rotating handle of the second setter screw, making the overall operation more convenient and smooth.

[0014] Compared with the prior art, the technical solution provided by this utility model has the following technical effects: The CT-guided puncture auxiliary orientation device of this utility model is designed based on the actual operation process of determining the target point, the needle insertion point on the skin surface, the needle insertion angle and depth during CT-guided puncture scanning. The design is scientific and precise. Compared with existing auxiliary positioning devices, the rotation axis of the level bubble and the rotation axis of the puncture needle fixing device are at the same height, ensuring that the rotation of the three-dimensional space where the level bubble is located and the three-dimensional space where the puncture needle is located can be coordinated and aligned to the greatest extent, making the orientation of the level bubble more reliable. The device has a simple and exquisite structure, and is convenient and flexible to operate. It can accurately guide the needle insertion direction during puncture, save surgical time, avoid the side effects caused by excessive radiation dose, avoid unnecessary complications, and greatly reduce the patient's pain. Therefore, this utility model can be widely used in the process of interventional examination, diagnosis and treatment guided by CT and MRI, and has high practical value. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a CT-guided puncture-assisted orientation device according to a certain embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a CT-guided puncture auxiliary orientation device after the goniometer is removed, according to a certain embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a CT-guided puncture auxiliary orientation device after removing the protractor and protractor pointer in a certain embodiment of the present invention; Figure 4 This is a schematic diagram of the structure after the first connecting block, the backing plate, and the connecting rod are connected in a certain embodiment of the present utility model; Figure 5 This is a schematic diagram of the structure of the second connecting block in a certain embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the signboard in a certain embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the bubble level base in a certain embodiment of the present invention; Figure 8 This is an overall assembly view of a CT-guided puncture auxiliary orientation device described in one embodiment of the present invention from another angle; Figure 9 This is a schematic diagram of the protractor and protractor pointer in a certain embodiment of the present invention.

[0018] In the diagram: 1. First connecting block; 2. Second connecting block; 3. Marker plate; 4. Bubble level base; 5. Protractor pointer; 6. Protractor; 7. Backing plate; 8. Angle scale line; 9. Pointer support arm; 10. Pointer head; 11. First shaft hole; 12. First rotating shaft; 13. Rectangular locking block; 14. First marking line; 15. Second marking line; 16. First set screw; 17. First slot; 18. Second shaft hole; 19. Second rotating shaft; 20. Second set screw; 21. Second slot; 22. Laser line aiming point; 23. Third marking line; 24. Connecting arm; 25. Locking block; 26. Needle groove; 27. Connecting rod; 28. Handle; 29. ​​Threaded rod; 30. Rotating handle; 31. Bubble level cylindrical slot. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0020] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] The following description sets forth many specific details to provide a full understanding of this utility model, but the utility model may also be implemented in other ways different from those described herein; wherein, for ease of description, the terms "left," "right," "up," "down," "front," and "rear" are used interchangeably with "right." Figure 1 While the left-right, up-down, and front-back directions are consistent, this does not limit the structure of this utility model. Clearly, the embodiments described in the specification are only a portion of the embodiments of this utility model, not all of them.

[0022] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] In one embodiment, such as Figures 1 to 9As shown, a CT-guided puncture auxiliary orientation device is provided, including a first connecting block 1, a second connecting block 2, a marker plate 3, a bubble level base 4, a protractor pointer 5, a protractor 6, and a backing plate 7; the protractor 6 has a rectangular slot at its center, and angle scale lines 8 are provided on the front side wall of the protractor 6; the protractor pointer 5 includes an integrally formed pointer support arm 9 and a pointer head 10, and the protractor pointer 5 is adapted to the protractor 6; the first connecting block 1 has a first shaft hole 11 extending through its front and rear, and a first rotating shaft 12 is fitted into the first shaft hole 11 with clearance; the front end of the first rotating shaft 12 is fixedly connected to a rectangular locking block 13 adapted to the rectangular slot of the protractor 6, and the rear end of the first rotating shaft 12 is... The first connecting block 1 is fixedly connected to the side wall of the marking plate 3. The top of the marking plate 3 has a first marking line 14 parallel to the axis of the first shaft hole 11, and the top of the first connecting block 1 has a second marking line 15. The first connecting block 1 also has a threaded first set screw 16 that can abut against the first rotating shaft 12. The top of the first connecting block 1 has a first slot 17 adapted to the pointer support arm 9. When the protractor 6 is installed on the rectangular locking block 13 of the first rotating shaft 12, and the protractor pointer 5 is inserted into the first slot 17 while the protractor pointer 5 is located at the 0 mark of the protractor 6, the first marking line 14 and the second marking line 15 on the top of the marking plate 3 are on the same straight line. The connecting block 2 has a second shaft hole 18 extending through its left and right sides. A second rotating shaft 19 is fitted into the second shaft hole 18 with a clearance. The left end of the second rotating shaft 19 is fixedly connected to a rectangular locking block 13 that matches the rectangular slot of the protractor 6. The right end of the second rotating shaft 19 is fixedly connected to the side wall of the bubble level base 4. The second connecting block 2 also has a second set screw 20 threadedly fitted to the second rotating shaft 19. The top of the second connecting block 2 has a second slot 21 that matches the pointer support arm 9. The top of the bubble level base 4 has a bubble level cylindrical slot 31 and four laser line aiming points 22. The four laser line aiming points 22 are evenly distributed along the circumference of the bubble level cylindrical slot 31. The top of the protractor 6 is provided with a third marking line 23 parallel to the axis of the second shaft hole 18; when the protractor 6 is installed on the rectangular locking block 13 of the second rotating shaft 19, the protractor pointer 5 is inserted into the second slot 21, and the protractor pointer 5 is located at the 0 mark of the protractor 6, the third marking line 23 and the two opposing laser aiming points 22 are on the same straight line; a connecting arm 24 extends forward on the second connecting block 2, and a locking block 25 that is inserted and cooperates with the connecting arm 24 extends on the marking plate 3; multiple sets of needle grooves 26 are provided on the front side of the back plate 7, and the left side of the back plate 7 is integrally connected to the right side of the first connecting block 1 by a connecting rod 27, and a handle 28 is connected to the rear side of the back plate 7.

[0024] In the CT-guided puncture auxiliary orientation device of this utility model, the second rotating shaft 19 and the bubble level base 4 are fixedly connected. The second rotating shaft 19 and the protractor 6 are fixedly engaged through the rectangular locking block 13 and the rectangular slot of the protractor 6. When the protractor 6 is installed on the rectangular locking block 13 of the second rotating shaft 19, rotating the protractor 6 will cause the bubble level base 4 to rotate synchronously. The first rotating shaft 12 and the marker plate 3 are fixedly connected, and the first rotating shaft 12 and the protractor 6 are fixedly engaged through the rectangular locking block 13 and the rectangular slot of the protractor 6. When the protractor 6 rotates a certain angle, the first connecting block 1 remains stationary, but the marker plate 3 will rotate synchronously with the first rotating shaft 12. The rotation of the marker plate 3 will cause the second connecting block 2, which is rigidly connected, to rotate a certain angle. When the first rotating shaft 12 needs to be fixed relative to the first connecting block 1, the first set screw 16 can be rotated towards the first rotating shaft 12 to tighten it. Similarly, when the second rotating shaft 19 needs to be fixed relative to the second connecting block 2, the second set screw 20 can be rotated towards the second rotating shaft 19 to tighten it. Specifically, the connecting rod 27 is L-shaped, with one end connected to the front right side of the first connecting block 1, and the backing plate 7 located to the right of the other end of the connecting rod 27. The connecting rod 27 is bent backward as a whole. After the connecting rod 27 connects the first connecting block 1 and the backing plate 7, the backing plate 7 is located to the right rear of the first connecting block 1, and the first connecting block 1, the connecting rod 27, and the backing plate 7 are all located in the same horizontal plane. The pointer support arm 9 of the protractor 6 is inserted into the first slot 17 or the second slot 21. The pointer head 10 is located on the top of the pointer support arm 9, and the tip of the pointer head 10 can extend to the plane where the angle scale line 8 of the protractor 6 is located. There are gaps between the pointer head 10 and the pointer support arm 9 and the protractor 6 to facilitate the rotation of the protractor 6. The rear end of the first rotating shaft 12 is integrally formed with the side wall of the marking plate 3. The right end of the second pivot 19 is integrally formed with the side wall of the bubble level base 4.

[0025] The operation process of the CT-guided puncture auxiliary orientation device described in this utility model during CT-guided puncture is as follows: Step 1, Preparation of other auxiliary devices: ① Place the level laser light and the gantry laser light orientation registration plate (patent number ZL201920192703.7) on the CT scanning bed, adjust the plate to be level, draw a straight line on the surface of the plate along the longitudinal laser line of the CT machine, and then move the plate out with the scanning bed; ② The tripod center column is perpendicular to the horizontal plane, the pan-tilt head is perpendicular to the pitch axis, and the level laser line is parallel to the tripod center column and parallel to the straight line drawn on the aforementioned registration plate along the longitudinal laser line of the CT gantry; Step 2: Scan the relevant parts of the patient with a CT scanner. Based on the purpose of the examination or treatment, determine the target point in the image displayed by the CT scanner, select a suitable needle insertion route, determine the optimal puncture point on the body surface, and measure the angle α between the oblique axis plane where the needle insertion route is located and the standard axis plane, the angle β between the needle insertion route and the anterior and posterior midline in the oblique axis plane, the distance d1 between the optimal puncture point on the body surface and the standard cross section where the special positioning marker on the body surface is located, the distance d2 between the optimal puncture point on the body surface and the special positioning marker on the body surface in the sagittal plane, and the distance d3 from the target point to the optimal puncture point on the body surface. Mark the optimal puncture point position on the body surface based on the distances d1 and d2. Step 3: The doctor sterilizes the area, puts on sterile gloves, drapes a sterile drape, exposes the best puncture point on the body surface, disinfects the area, and administers local anesthesia. Step 4: Aseptically remove the sterilized CT-guided puncture auxiliary orientation device of this utility model. First, tightly fit the protractor 6 with the rectangular block 13 of the second rotating shaft 19 connected to the bubble level base 4 through the rectangular slot in its center. Tightly fit the lower part of the pointer support arm 9 with the second slot 21. Rotate the protractor 6 so that the protractor pointer 5 points to the scale line corresponding to -α. Fix the second rotating shaft 19 with the second set screw 20. Then remove the protractor 6 and tightly fit the protractor 6 with the rectangular block 13 of the first rotating shaft 12 connected to the marker plate 3 through the rectangular slot in its center. Tightly fit the lower part of the pointer support arm 9 with the first slot 17. Rotate the protractor 6 so that the protractor pointer 5 points to the scale line corresponding to -β. Fix the first rotating shaft 12 with the first set screw 16. Then remove the protractor 6 and the protractor pointer 5. Step 5: The surgeon holds the handle 28 and presses the puncture needle into the needle groove 26 at the back plate 7, placing the needle tip at the optimal puncture point and adjusting the direction of the needle tail until the spirit level is kept horizontal. The assistant adjusts the overhead camera arm so that the longitudinal laser line of the level at the far end of the overhead camera arm is close to the spirit level. At the same time, the surgeon adjusts the orientation of the spirit level so that the line connecting the longitudinal markers around the spirit level is parallel to the longitudinal laser line, which is the target puncture direction. The surgeon fixes the position of the CT-guided puncture auxiliary orientation device with one hand and pushes the puncture needle inward along the needle groove 26 to the predetermined depth with the other hand, then releases the fingers to remove the CT-guided puncture auxiliary orientation device of this utility model.

[0026] Based on the above embodiments, in a preferred embodiment, a first marking line 14 is provided at the bottom of the marking plate 3. The first marking line 14 at the bottom of the marking plate 3 corresponds to the first marking line 14 at the top of the marking plate 3, and both are parallel to the axis of the first shaft hole 11. Rotating the marking plate 3 by 180° so that the second connecting block 2 is rotated to the right side of the marking plate 3 will bring the level bubble closer to the plate 7, making it easier to observe the level of the level bubble during puncture.

[0027] Based on the above embodiments, in a preferred embodiment, the first set screw 16 is installed on the left side of the first connecting block 1, and the first set screw 16 includes a threaded rod 29 and a rotating handle 30 connected thereto; the second set screw 20 is installed on the rear side of the second connecting block 2, and the second set screw 20 includes a threaded rod 29 and a rotating handle 30 connected thereto. This arrangement is more reasonable and makes it more convenient to rotate the first set screw 16 or the second set screw 20.

[0028] Based on the above embodiments, in a preferred embodiment, the multiple sets of needle grooves 26 on the support plate 7 are adapted to puncture needles of different diameters. The diameters of the needle grooves 26 on the support plate 7 are also different, thus adapting to puncture needles of different diameters.

[0029] Based on the above embodiments, in a preferred embodiment, the first marking line 14, the second marking line 15, the third marking line 23, and the laser aiming point 22 all protrude from their respective planes. The first marking line 14, the second marking line 15, and the third marking line 23 are all raised lines, and the laser aiming point 22 is a raised block. This arrangement makes alignment more convenient when needed.

[0030] Based on the above embodiments, in a preferred embodiment, the first slot 17 is located at the top of the first connecting block 1 near the front edge, and the second slot 21 is located at the top of the second connecting block 2 near the left edge. This arrangement is structurally sound.

[0031] Based on the above embodiments, in a preferred embodiment, the first connecting block 1, the second connecting block 2, and the bubble level base 4 are all cuboid structures, while the marker plate 3 and the backing plate 7 are rectangular plate structures. The area of ​​the rear sidewall of the first connecting block 1 is equal to the area of ​​the marker plate 3. This arrangement is structurally reasonable.

[0032] Based on the above embodiments, in a preferred embodiment, anti-slip silicone layers are respectively provided on the outer walls of the handle 28, the rotating handle 30 of the first set screw 16, and the rotating handle 30 of the second set screw 20. This arrangement prevents slippage when rotating the handle 28, the rotating handle 30 of the first set screw 16, or the rotating handle 30 of the second set screw 20, making the overall operation more convenient and smooth.

[0033] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A CT-guided puncture-assisted orientation device, characterized in that, It includes a first connecting block (1), a second connecting block (2), a marker plate (3), a bubble level base (4), a protractor pointer (5), a protractor (6), and a backing plate (7); The center of the protractor (6) is provided with a rectangular slot, and the front side wall of the protractor (6) is provided with angle scale lines (8). The protractor pointer (5) includes an integrally molded pointer support arm (9) and pointer head (10), and the protractor pointer (5) is adapted to the protractor (6); The first connecting block (1) has a first shaft hole (11) running through it from front to back. A first rotating shaft (12) is fitted into the first shaft hole (11) with a clearance. A rectangular locking block (13) that matches the rectangular slot of the protractor (6) is fixedly connected to the front end of the first rotating shaft (12). The rear end of the first rotating shaft (12) is fixedly connected to the side wall of the marking plate (3). A first marking line (14) parallel to the axis of the first shaft hole (11) is provided on the top of the marking plate (3). A second marking line (15) is provided on the top of the first connecting block (1). (1) The first set screw (16) is threaded and can be tightly fitted with the first rotating shaft (12). The top of the first connecting block (1) is provided with a first slot (17) that is adapted to the pointer support arm (9). When the protractor (6) is installed on the rectangular card block (13) of the first rotating shaft (12), the protractor pointer (5) is inserted into the first slot (17), and the protractor pointer (5) is located at the 0 mark of the protractor (6), the first mark line (14) and the second mark line (15) on the top of the mark plate (3) are on the same straight line. The second connecting block (2) has a second shaft hole (18) running through it on both sides. A second rotating shaft (19) is fitted in the second shaft hole (18) with a gap. A rectangular locking block (13) that matches the rectangular slot of the protractor (6) is fixedly connected to the left end of the second rotating shaft (19). The right end of the second rotating shaft (19) is fixedly connected to the side wall of the bubble level base (4). The second connecting block (2) also has a second set screw (20) that can be threaded onto the second rotating shaft (19). The top of the second connecting block (2) is provided with a second slot (21) that matches the pointer support arm (9). The top of the bubble level base (4) is provided with a bubble level cylindrical slot (31) and four laser line aiming points (22). The laser line aiming points (22) are evenly distributed around the circumference of the spirit level cylindrical slot (31). The top of the second connecting block (2) is provided with a third marking line (23) parallel to the axis of the second shaft hole (18). When the protractor (6) is installed on the rectangular block (13) of the second rotating shaft (19), and the protractor pointer (5) is inserted into the second slot (21) and the protractor pointer (5) is located at the 0 mark of the protractor (6), the third marking line (23) and the two opposing laser line aiming points (22) are on the same straight line. A connecting arm (24) extends forward on the second connecting block (2), and a block (25) that is inserted and engaged with the connecting arm (24) extends on the marking plate (3). The front side of the back plate (7) is provided with multiple sets of needle grooves (26). The left side of the back plate (7) and the right side of the first connecting block (1) are integrally connected by a connecting rod (27). The back plate (7) is connected to a handle (28).

2. The CT-guided puncture assistance orientation device of claim 1, wherein, The bottom of the label plate (3) is provided with a first label line (14). The first label line (14) at the bottom of the label plate (3) corresponds to the first label line (14) at the top of the label plate (3) and is parallel to the axis of the first shaft hole (11).

3. The CT-guided puncture assistance orientation device of claim 2, wherein, The first set screw (16) is installed on the left side of the first connecting block (1), and the first set screw (16) includes a threaded rod (29) and a rotating handle (30) connected to it; the second set screw (20) is installed on the rear side of the second connecting block (2), and the second set screw (20) includes a threaded rod (29) and a rotating handle (30) connected to it.

4. A CT-guided puncture assistance orientation device according to any one of claims 1 to 3, characterized in that, The multiple sets of needle grooves (26) on the back plate (7) are adapted to puncture needles of different thicknesses.

5. A CT-guided puncture assistance orientation device according to claim 4, wherein, The first marking line (14), the second marking line (15), the third marking line (23), and the laser aiming point (22) all protrude from their respective planes.

6. The CT-guided puncture-assisted orientation device according to claim 5, characterized in that, The first slot (17) is located at the top of the first connecting block (1) near the front edge, and the second slot (21) is located at the top of the second connecting block (2) near the left edge.

7. A CT-guided puncture assistance orientation device according to claim 6, wherein, The first connecting block (1), the second connecting block (2), and the leveling bubble base (4) are all cuboid structures, while the marking plate (3) and the backing plate (7) are rectangular plate structures. The area of ​​the rear side wall of the first connecting block (1) is equal to the area of ​​the marking plate (3).

8. The CT-guided puncture assistance orientation device of claim 3, wherein, Anti-slip silicone layers are respectively provided on the outer walls of the handle (28), the rotating handle (30) of the first set screw (16) and the rotating handle (30) of the second set screw (20).

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