Disposable CT (Computed Tomography) positioning puncture fixed-angle guider

Abstract

The utility model relates to the field of medical instruments, in particular to a disposable CT (Computed Tomography) positioning puncture fixed-angle guiding device which comprises a base, an angle arc-shaped frame and a needle clamping positioning sliding block. The base is matched with the angle arc-shaped frame, the needle clamping positioning sliding block capable of moving freely is matched, a puncture angle reference line on the angle arc-shaped frame is referred, and a clamping structure capable of clamping a large puncture needle and a small puncture needle is further arranged, so that the CT positioning puncture fixed-angle guiding device is small in size, accurate in positioning, easy to operate and convenient to use. The operation procedures of doctors are reduced, the operation time is shortened, and the working efficiency of the doctors is improved. Meanwhile, the long-time puncture pain of a patient is relieved, and good economic value and social value are achieved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a disposable CT positioning puncture angle-fixing guide. Background Art

[0002] Percutaneous minimally invasive surgery has the advantages of less trauma, less bleeding, mild pain and quick recovery, and is widely used in clinical practice: 1. Minimally invasive treatment fields: such as tumor radiofrequency treatment, local tumor particle radiotherapy, etc.; interventional pain treatment, trigeminal nerve radiofrequency treatment, minimally invasive intervertebral disc treatment, etc.; 2. Local precision drug delivery treatment: such as spinal facet joint injection, various nerve blocks or nerve damage, local tumor drug delivery, etc.; 3. Deep tissue and organ biopsy: liver, kidney, lung and other organ tissue biopsy, pelvic mass, mediastinal mass biopsy, etc.; 4. Tissue fluid drainage: liver abscess drainage, ascites drainage, cerebrospinal fluid drainage, etc.

[0003] The current percutaneous puncture method for minimally invasive CT-guided particle radiation therapy involves first performing a CT scan of the patient's treatment area, then determining the puncture site and angle based on experience. This method relies heavily on the physician's experience and carries a relatively high risk for the patient. Often, the specific location of the lesion requires the needle to be tilted at a specific angle. However, this precise angle is difficult to accurately determine in practice and is often less accurate than vertical insertion, making puncture difficult, especially for small lesions, where the likelihood of puncture failure increases.

[0004] The doctor needs to hold the puncture needle steadily for a long time, adjust the angle and position, and maintain a stable angle. These operations require very high experience and proficiency of the doctor, and are also a great challenge to the doctor's physical strength. Holding the arm for a long time or making subtle and precise adjustments can easily cause arm soreness and displacement of the puncture needle, which has a great impact on stability.

[0005] At present, the puncture method based on 3D printing technology is gradually being promoted in major hospitals. This method first performs a CT scan on the patient, imports the scan data into special software to generate a three-dimensional digital model, and calculates the optimal puncture needle track and puncture depth to reach the target position. The data is then imported into the 3D printing device to print out a 3D puncture guide. The doctor uses the guide to determine the puncture site and angle. This method can achieve efficient and accurate puncture, but the production process is complicated, time-consuming, has poor adaptability, high cost, and a heavy economic burden on patients. Summary of the Invention

[0006] In order to solve the above problems, the purpose of the present invention is to provide a disposable CT positioning puncture angle guide for achieving precise puncture.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] The utility model provides a disposable CT positioning puncture angle guide, comprising: a base, an angle arc frame, and a needle clamping and positioning slider;

[0009] There are rotating shafts on both sides of the angle arc frame, and rotating shaft fixing seats are provided on both sides of the base. The angle arc frame is movably connected to the base by rotating the rotating shafts on both sides. The angle arc frame can rotate forward and backward along the rotating shafts on both sides. The angle arc frame is marked with a puncture angle reference line;

[0010] The needle positioning slider includes an upper needle positioning slider and a lower needle positioning slider, which are buckled together to form an arc slide that wraps the angle arc frame. The needle positioning slider passes through the angle arc frame and is slid onto the angle arc frame through the arc slide. A puncture needle clamping structure for clamping the puncture needle is provided on the needle positioning slider.

[0011] Furthermore, a baffle, a buckle cover, and a buckle tooth are provided on the needle clamping positioning upper slider; a puncture needle clamping groove is provided on the baffle; one end of the buckle cover is connected to the needle clamping positioning upper slider for opening and closing, and the other end of the buckle cover is detachably buckled with the buckle tooth; a puncture needle giving way groove is provided on the buckle cover; the puncture needle clamping groove and the puncture needle giving way groove form a puncture needle channel that runs through from top to bottom.

[0012] Furthermore, an angle observation window is provided on the needle clamp positioning upper slider, and a deformation space is formed between the angle observation window and the blocking piece.

[0013] Furthermore, a level card slot is provided on both sides of the angle observation window on the clamp needle positioning upper slider, and a cylindrical level is built into the level card slot.

[0014] Furthermore, a number of mutually interlocking positioning square columns, positioning square column holes and a number of mutually interlocking locking flaps and lock flap interlocking holes are provided on the opposite surfaces of the clamping needle positioning upper slider and the clamping needle positioning lower slider; a number of positioning square columns, positioning square column holes, locking flaps and lock flap interlocking holes are distributed on both sides of the arc slide.

[0015] Furthermore, the base is made of a flexible and bendable soft plastic material, and the base is a plane with a T-shaped structure, which is perpendicular to the straight line where the puncture point is located. Three long fixed arms are provided on the base, forming a T-shaped structure.

[0016] Furthermore, a positioning opening is provided in the middle of the base in an inward semicircular shape for locating the center of the puncture point; on the T-shaped strip of the base, on a straight line with the center of the semicircular positioning opening, and toward the center lines of the left and right fixed arms, there is a positioning scale line groove that runs through the strip from top to bottom and coincides with the infrared transverse line of the CT machine; the base is provided with a folding groove that runs forward and backward to facilitate bending on both sides.

[0017] Furthermore, the rotating shaft fixing seat includes a locking fixing seat and a sleeve structure, and the locking fixing seat includes a connected locking arc seat and a lower pressure plate; a thickened clamping surface is provided on the base corresponding to the lower part of the lower pressure plate; a clamping and yielding portion is provided between the locking arc seat and the lower pressure plate; the sleeve structure is divided into a two-section structural design, the upper part of the inner section is open, and the lower part of the outer section is opened.

[0018] Furthermore, a circular through hole is provided between the locking arc seat and the lower pressing plate, and a square recessed groove matching the square nail head is provided at the bottom of the lower pressing plate.

[0019] Furthermore, a hydrogel patch is provided at the lower part of the base.

[0020] The disposable CT positioning puncture angle guide of the present invention comprises a base, an angled arc frame, and a needle-holding positioning slider. The base cooperates with the angled arc frame, is equipped with a freely movable needle-holding positioning slider, and is equipped with a puncture angle reference line on the angled arc frame, and a clamping structure that can hold both large and small puncture needles. This makes the CT positioning puncture angle guide compact, precise in positioning, simple to operate, and easy to use. It simplifies the doctor's operating procedures, shortens the operation time, and improves the doctor's work efficiency. At the same time, it alleviates the patient's pain caused by prolonged puncture, and has good economic and social value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 This is a structural diagram of one angle of the disposable CT positioning puncture fixed angle guide of the utility model;

[0023] Figure 2 This is a structural diagram of another angle of the disposable CT positioning puncture fixed angle guide of the utility model;

[0024] Figure 3 This is a structural exploded view of the disposable CT positioning puncture angle guide of the utility model;

[0025] Figure 4This is a cross-sectional view of the structure of a disposable CT positioning puncture fixed angle guide of the utility model;

[0026] Figure 5 This is a structural diagram of the base of the disposable CT positioning puncture fixed angle guide of the utility model;

[0027] Figure 6 This is a structural diagram of a needle-holding positioning upper slider in one state of the disposable CT positioning puncture angle guide of the utility model;

[0028] Figure 7 This is a structural diagram of another state of the upper slide block for needle positioning in the disposable CT positioning puncture angle guide of the utility model;

[0029] Figure 8 This is a structural diagram of one angle of the upper slider for positioning the middle needle in the disposable CT positioning puncture angle guide of the utility model;

[0030] Figure 9 This is a structural diagram of another angle of the upper slider for positioning the middle needle in the disposable CT positioning puncture fixed angle guide of the utility model;

[0031] Figure 10 This is a structural diagram of the lower slide block for needle positioning in the disposable CT positioning puncture angle guide of the utility model;

[0032] Figure 11 This is a structural diagram of the angled arc frame in the disposable CT positioning puncture fixed angle guide of the utility model;

[0033] The accompanying drawings are marked as follows: 1. base; 2. angle arc frame; 3. needle clamp positioning slider; 4. rotating shaft; 5. puncture angle reference line; 6. needle clamp positioning upper slider; 7. needle clamp positioning lower slider; 8. baffle; 9. buckle cover; 10. buckle teeth; 11. puncture needle clamping groove; 12. puncture needle yielding groove; 13. angle observation window; 14. level card slot; 15. positioning square column; 16. locking flap; 17. locking flap buckling hole; 18. positioning port; 19. positioning scale line groove; 20. broken line groove; 21. locking fixing seat; 22. shaft sleeve structure; 23. locking arc seat; 24. lower pressing plate; 25. circular through hole; 26. square sink; 27. hydrogel patch; 28. inspection rod. DETAILED DESCRIPTION

[0034] In order to help those skilled in the art better understand the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0035] like Figures 1 to 11 As shown, the purpose of the present invention is to provide a disposable CT positioning puncture angle guide, which can quickly determine the puncture point depth and puncture angle, thereby achieving precise puncture.

[0036] The utility model is an angle guide, which comprises a base 1, an angle arc frame 2, a needle clamping and positioning slide block 3, and a fixing and applying part.

[0037] Base 1 part:

[0038] 1. The base 1 is made of elastically bendable soft plastic material, which can bend and fit well with the patient's skin surface.

[0039] 2. The base 1 features a T-shaped flat surface, perpendicular to the line where the puncture point is located. Three long, fixed arms are attached to the base 1, forming a T-shaped structure. This T-shaped structure not only increases stability after application to the skin, preventing it from tilting, but also leverages the base 1's flexible nature to further ensure a stable fit.

[0040] 3. An inward-facing semicircular positioning opening 18 is located in the center of the base 1. This opening 18 is open toward the front. When the angle guide is applied to the skin, the marked puncture point is positioned at the center of the semicircular positioning opening 18 in the center of the base 1. The semicircular structure of the semicircular positioning opening 18 is used to locate the center of the puncture point.

[0041] 4. On the T-shaped strip of the base 1, on a straight line with the center of the semicircular positioning opening 18, and toward the center line of the left and right fixed arms, there is a positioning scale groove 19 that runs through the top and bottom, which can be aligned with the infrared transverse line of the CT machine. The traditional base 1 has fine-tuning rotation, which makes it troublesome for doctors to operate, and the structure is complex and cumbersome. It cannot be perfectly adhered to the skin, and the efficiency is low. The scale lines of the positioning scale groove 19 in the utility model are arranged in sequence in millimeters, and the scale numbers are marked at 5mm and 10mm. Beneficial effect: After the first puncture needle punctures the center of the circle, it is necessary to locate the puncture point at other positions. It can be accurately measured and positioned according to the scale in this positioning scale groove. It can be used for two purposes, and there is no need to repeat the initial operation to locate the puncture point.

[0042] 5. The fold line grooves 20 at the bottom of the base 1 run forward and backward to facilitate bending on both sides. The fold line grooves 20 are evenly distributed, so that the entire base 1 can further improve the bending fit, reduce the internal stress of the base 1 after bending, better adhere to the skin, and avoid warping.

[0043] 6. The left side is a locking fixed seat 21, which is fixedly connected to the base 1 as a whole, including a locking arc seat 23 and a lower pressing plate 24. The inner wall of the locking arc seat 23 is a frosted arc wall, and the lower part of the lower pressing plate 24 corresponds to a thickened clamping surface on the base 1. The cross-section of the inner arc wall of the locking arc seat 23 is C-shaped. The corresponding surface of the lower pressing plate 24 and the clamping surface is a frosted surface that is conducive to locking the pressing plate, and a clamping clearance is left. There is an inclined notch at the clearance of the upper pressing plate to ensure that the upper and lower pressing surfaces have a larger clearance space when locking the arc frame shaft 4. There is a circular through hole 25 in the middle of the pressing plate next to the upper and lower pressing plate locking arc arms, and a square recess 26 is left at the bottom of the lower pressing plate 24 of the base 1. The recess is specially designed for the square nail head of the locking screw, and the hole on the recess is a circular hole to pass through the cylindrical nail body. This can prevent the locking screw from slipping during rotation when tightened, and can also prevent the square nail head from protruding from the outside of the base 1 and rubbing against the skin, which is more conducive to the fit and fixation of the puncture frame to the skin surface. There is a sleeve structure 22 at the corresponding position on the right side. The sleeve structure 22 is divided into a two-section structural design, with the upper part of the inner section open and the lower part of the outer section open. It can not only ensure the stability of the sleeve, but also facilitate mold opening and reduce costs. On the inner edge base 1 of the locking fixing seat 21 and the sleeve structure 22, there is a clearance groove that opens from the inside to the position of the rotating shaft 4, which can enable the arc-shaped beam to maintain the maximum rotation angle. A blocking bump is provided at the bottom plate position inside the clearance groove on the side of the sleeve structure 22 to fix the arc beam so that it will not fall off.

[0044] 7. Captive Screw and Locking Cap. The captive screw has a square head and should be inserted upward from the bottom of base 1. Once inserted, the square screw head fits into the square relief groove in base 1 and exits through the upper pressure plate. The locking cap has a spiral inner edge and a sealed top. The exterior features vertical knurling to increase the friction area and prevent slippage. The square screw head, nestled into the square relief groove in base 1, not only secures the angle and prevents rotation when tightening, but also ensures that the square screw head is flush with the base plate, ensuring a smoother contact with the skin.

[0045] 8. Under the base 1 is a hydrogel patch 27 that is consistent with the outer edge of the base 1 and is disc-shaped and expanded at the distal ends of the three sides of the base 1 to increase the adhesive area, so as to facilitate better fixation of the base plate to the skin surface.

[0046] 2. Angle arc frame 2:

[0047] 1. The angled arc frame 2 is a semicircular frame with the puncture point as the center, including a frame structure and two rotating shafts 4.

[0048] 2. The top of the angled arc frame 2 is marked with a puncture angle reference line 5. This line is used to determine the deviation of the puncture needle from the perpendicular puncture angle of the body when the slider with the puncture needle is slid on the angled arc frame 2. The puncture angle displayed on the CT monitor is used to determine the inclination angle of the puncture needle. The center of the angled arc frame 2 is positioned at 90 degrees. The scale is graduated in degrees, with the left side marked in ten-degree increments up to 20 degrees, and the right side is marked up to 160 degrees.

[0049] 3. The inner curved wall of the angled arc frame 2 features integrally fixed, raised reinforcement ribs, creating a T-shaped cross-section and ensuring the rigidity of the crossbeam. The angled arc frame 2 has angled arms at either end, primarily to accommodate the needle clamping mechanism of the puncture positioning slider and ensure alignment of the puncture needle and the axis of the connecting shaft. The two endpoints of the angled arc frame 2 are cylindrical shafts 4, which are frosted to ensure sufficient friction between the locking plate and the shaft when the shaft 4 is locked.

[0050] 4. The two rotating shafts 4 of the angle arc frame 2 are eccentric to the crossbeam, and the axes of the two rotating shafts 4 are aligned with the puncture point to ensure that the puncture point corresponding to the puncture needle is aligned with the rotating shaft 4.

[0051] 3. Needle clamping positioning slider 3:

[0052] 1. The clamping needle positioning slider 3 includes two parts: the clamping needle positioning upper slider 6 and the clamping needle positioning lower slider 7. The clamping needle positioning upper slider 6 and the clamping needle positioning lower slider 7 form a T-shaped arc slide that wraps the T-shaped angle arc frame 2. The clamping needle positioning slider 3 is divided into two parts, upper and lower, along the T-shaped angle arc frame 2. The lower edge of the clamping needle positioning upper slider 6 of the upper part is provided with three groups of locking petals 16 and a positioning square column 15 hole along both sides of the T-shaped arc slide. After coupling with the locking petal snap-fitting hole 17 and the positioning square column 15 in the clamping needle positioning lower slider 7 at the corresponding position, the clamping needle positioning upper slider 6 and the clamping needle positioning lower slider 7 are fixed into an integral clamping needle positioning slider 3, which slides along the T-shaped angle arc frame 2.

[0053] 2. The middle position of the sliding channel of the upper slider 6 is upwardly penetrated with a square opening, which is an angle observation window 13 for the puncture needle insertion angle and the angle reference line marked on the angle arc frame 2. The four sides of the window are sloped, which can increase the observation angle and facilitate the doctor's operation.

[0054] 3. A screw hole is designed on the left side of the angle observation window 13 for screwing and locking. The screw locks the arc surface on the frame, thereby locking the entire needle positioning slider 3 relative to the angle arc frame 2.

[0055] 4. A level slot 14 is designed on the right and rear sides of the angle observation window 13. The level slot 14 has a built-in cylindrical level. There are ear plates on both sides of the level slot 14 for fixing and protection. The level slot 14 and the level are fixed with glue.

[0056] 5. The front wall of the angle observation window 13 is designed with a scale indicator. The scale indicator is aligned with the puncture needle clamping slot 11 on the needle clamping upper slider 6 and points to the scale on the angle arc frame 2, making it easy for the doctor to intuitively judge the puncture needle angle. A baffle 8 is provided in front of the angle observation window 13. A rectangular slot is defined between the baffle 8 and the angle observation window 13, creating a space for the baffle 8 to deform, allowing space for the baffle 8 to deform when holding the puncture needle. The baffle 8 has a V-shaped puncture needle clamping slot 11. A snap cover 9, which can be opened and closed at an angle, is connected to the left side of the front end of the needle clamping upper slider 6. The snap cover 9 includes a snap cover 9 arm, a puncture needle clearance slot 12 corresponding to the puncture needle clamping slot 11, a locking tooth at the front end of the snap cover 9, and a hand-pick structure at the very front end of the snap cover 9 for easy opening. A snap tooth 10 is provided on the right side of the front end of the needle clamping upper slider 6. When the buckle cover 9 is buckled, the puncture needle clamping groove 11 and the puncture needle giving way groove 12 form a puncture needle passage that runs through from top to bottom. Since the baffle 8 and the buckle cover 9 have a certain amount of deformation, they can adapt to puncture needles of different diameters.

[0057] 6. The lower slider 7 for positioning the needles engages with the upper slider 6 for positioning the needles, forming a single, integrated slider that wraps around the angled curved frame 2. The center of the lower slider 7 defines a sliding path for the curved angled frame. The engaging surface features three locking holes 17, each containing a locking pin. A positioning post 15 and three locking holes 17 are arranged on either side of the slide, ensuring a stable engagement.

[0058] Instructions for use:

[0059] 1. Under CT imaging, with the help of metal positioning wires or positioning stickers, determine the puncture point on the patient's body surface according to the patient's lesion location, body structure, and the optimal angle and distance for needle insertion, and mark it with a marker.

[0060] 2. Align the puncture point determined on the body surface with the infrared transverse line of the CT machine so that they are on the same CT scanning tangent line.

[0061] 3. Take out the angle guide, tear off the release paper of the angle guide fixed on the lower part of the base 1, align the center point of the 'C'-shaped notch with the puncture point, align the groove in the center of the base 1 with the infrared cross-section line of the CT machine, and stick it to the skin surface.

[0062] 4. Insert the puncture needle into the skin 1-2 cm deep through the puncture point, open the buckle cover 9 of the positioning slider, and fix the puncture needle stem in the clamping groove of the clamping mouth of the angle guide.

[0063] 5. Swing the angle arc frame 2, refer to the spirit level to make the angle arc frame 2 perpendicular to the skin surface, tighten the clamping nut on the base 1 to lock the rotating shaft 4 of the angle arc frame 2, so that the angle arc frame 2 no longer swings left and right.

[0064] 6. Slide the clamping slider and refer to the spirit level to align the puncture needle on the clamping slider vertically to the puncture point. Remember the corresponding angle, which is 0 degrees vertical.

[0065] 7. Tighten the nut on the clamping slider to secure it. Keep the puncture needle at an absolutely vertical angle.

[0066] 8. Use a CT machine to scan and determine the puncture angle and depth from the skin puncture point to the lesion based on the location of the lesion displayed on the CT scan screen.

[0067] 9. Adjust the angle of the clamping slider. Observe the vertical angle displayed on the angle arc frame 2 through the observation hole, calculate the angle corresponding to the angle of the puncture needle on the angle arc frame 2, and then use the nut on the clamping slider to tighten the angle arc frame 2 to lock the clamping slider.

[0068] 10. According to the depth from the puncture point on the body surface to the lesion location displayed on the CT image screen, the puncture can be performed at the corresponding depth according to the length line on the surface of the puncture needle at the position of the clamp to accurately reach the puncture location.

[0069] 11. Use CT machine to scan again to check whether the puncture needle has reached the lesion location. If it is not ideal, perform a second fine-tuning of the puncture.

[0070] 12. Once the puncture is complete, open the cover 9 on the clamping slider, remove the puncture needle, and peel off the angle guide patch attached to the skin. Disinfect and bandage the puncture site to complete the puncture. Dispose of the angle guide as general medical waste.

[0071] The beneficial effects of the utility model are:

[0072] 1. This angle guide is compact and lightweight, with a scientific and rational structure, strong practicality, high puncture positioning accuracy, and easy operation. The angle guide utilizes a soft plastic base 1 and a circular arc frame structure, along with a freely movable clamping slider, two sets of spirit levels on the clamping slider, angle reference lines on the angle arc frame 2, and a clamping structure that can hold both large and small puncture needles. This makes the puncture positioning frame compact, precise in positioning, simple to operate, and easy to use. It simplifies the doctor's operating procedures, shortens operation time, and improves the doctor's work efficiency. It also reduces the pain of prolonged punctures for patients. It has excellent economic and social value.

[0073] 2. The long strip positioning scale groove 19 in the center of the three sides of the angle guide base 1 can be used to refer to the correspondence between the CT machine's transverse line and the groove to ensure that the puncture needle remains in the direction of the patient's transverse line, and can also provide a coordinate reference when determining other puncture points.

[0074] 3. The locking mechanism of the angle guide utilizes upper and lower pressure plates 24. A gap is left in the opening between the upper and lower pressure plates 24, and the opening of the upper pressure plate is treated with a beveled notch, further increasing the locking space of the upper and lower pressure plates 24. Furthermore, the locking pressure surface and the four surfaces of the crossbeam shaft are frosted, ensuring both axial rotation and secure locking when positioning is required.

[0075] 4. Two sets of spirit levels are set perpendicular to each other. Doctors can find the puncture angle and perform precise punctures in just two steps. First, refer to the spirit level on the angled arc holder 2 to ensure the puncture needle is perpendicular to the body. Then, refer to the angle difference between the horizontal angle of the other spirit level and the puncture angle. Adjust the slider to the angle that matches the difference to precisely puncture the lesion. This saves the doctor the tedious back-and-forth adjustments and multiple punctures, saving the doctor time and alleviating the patient's pain.

[0076] 5. The elastic clamping jaws of the clamping slider adopt a 'V'-shaped clamping jaw design on both sides. There is a rectangular through-hole groove behind the baffle 8, which makes the baffle 8 very thin and full of tension. This not only can firmly clamp the puncture needle, but also can adapt to puncture needles of different diameters.

[0077] 6. The design of the inspection rod 28 allows the doctor to use the inspection rod 28 as a reference when fixing the puncture positioning patch, making it easy to align the puncture needle with the marked puncture point without misalignment, making the puncture more accurate.

[0078] 7. The angle arc frame 2 moves in an arc with the puncture point as the center, and the lower fulcrum of the angle arc frame 2 adopts a yielding oblique arm structure to ensure that the puncture needle and the puncture point are in the same straight line, so as to achieve a more accurate puncture angle.

[0079] 8. The clamping slider is composed of two parts, one above the other, which are connected by a locking flap 16 structure. The locking flaps 16 are arranged on both sides of the angled arc frame 2, with the flap teeth facing each other, so that the upper and lower parts of the slider are tightly connected and cannot slide or loosen. This also facilitates mold opening and assembly.

[0080] 9. The slope design and markings on all four sides of the observation window expand the observation direction and allow the patient to intuitively see the puncture angle corresponding to the puncture needle.

[0081] 10. The bottom plate of the angle guide adopts a "T"-shaped three-sided structure, with long positioning scale grooves 19 distributed horizontally on the three sides. The material is flexible soft plastic, which is conducive to the angle guide to better fit the uneven skin surface and make the puncture operation more stable.

[0082] 11. The open positioning opening 18 of the angle guide base 1 helps the doctor to accurately locate the puncture point with the help of the positioning opening 18.

[0083] 12. The angle guide's base is constructed from a hydrogel sheet with three rounded ends, increasing its contact area with the skin. This allows it to conform to the deformation of the skin and adapt to various uneven surfaces, ensuring a more secure adhesion. The hydrogel also adheres well to freshly disinfected skin with residual liquid, a feature not found in other compresses.

[0084] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A disposable CT positioning puncture angle guide, characterized in that: include: Base, angled arc frame, clamp needle positioning slider; Both sides of the angled arc frame are provided with a rotating shaft, and the two sides of the base are provided with a rotating shaft fixing seat. The angled arc frame is movably connected to the base by rotating the rotating shafts on both sides respectively on the rotating shaft fixing seats on both sides of the base. The angled arc frame can rotate back and forth along the rotating shafts on both sides, and the angled arc frame is marked with a puncture angle reference line; The needle positioning slider includes an upper needle positioning slider and a lower needle positioning slider, and the upper needle positioning slider and the lower needle positioning slider are buckled together to form a circular arc slide that wraps the angle arc frame. The needle positioning slider passes through the angle arc frame and is slidably arranged on the angle arc frame through the circular arc slide. A puncture needle clamping structure for clamping the puncture needle is provided on the needle positioning slider.

2. The disposable CT positioning puncture angle guide according to claim 1, characterized in that: The needle clamping positioning upper slider is provided with a baffle, a buckle cover, and a buckle tooth. The baffle is provided with a puncture needle clamping groove. One end of the buckle cover is connected to the needle clamping positioning upper slider for opening and closing, and the other end of the buckle cover is detachably buckled with the buckle tooth. The buckle cover is provided with a puncture needle yielding groove. The puncture needle clamping groove and the puncture needle yielding groove form a puncture needle channel that passes through from top to bottom.

3. The disposable CT positioning puncture angle guide according to claim 2, characterized in that: An angle observation window is provided on the clamping needle positioning upper slider, and a deformation space is formed between the angle observation window and the blocking piece.

4. The disposable CT positioning puncture angle guide according to claim 3, characterized in that: The clamping needle positioning upper slider is provided with level slots on both sides of the angle observation window, and the level slots have built-in cylindrical levels.

5. The disposable CT positioning puncture angle guide according to claim 1, characterized in that: A number of mutually interlocking positioning square columns, positioning square column holes and a number of mutually interlocking locking flaps and lock flap engaging holes are provided on the opposite surfaces of the clamping needle positioning upper slider and the clamping needle positioning lower slider; the several said positioning square columns, positioning square column holes, locking flaps and lock flap engaging holes are distributed on both sides of the said circular arc slide.

6. The disposable CT positioning puncture angle guide according to claim 1, characterized in that: The base is made of a flexible plastic material that can be elastically bent. The base is a plane with a T-shaped structure, which is perpendicular to the straight line where the puncture point is located. Three long fixed arms are provided on the base, forming a T-shaped structure.

7. The disposable CT positioning puncture angle guide according to claim 1, characterized in that: A semicircular positioning opening facing inward is provided in the middle of the base for locating the center of the puncture point; on the T-shaped strip of the base, a positioning scale line groove is provided which runs through the strip from top to bottom and is in a straight line with the center of the semicircular positioning opening and faces the center line of the left and right fixed arms. The positioning scale line groove coincides with the infrared transverse line of the CT machine; the base is provided with a folding groove which runs forward and backward to facilitate bending on both sides.

8. The disposable CT positioning puncture angle guide according to claim 1, characterized in that: The rotating shaft fixing seat includes a locking fixing seat and a sleeve structure. The locking fixing seat includes a connected locking arc seat and a lower pressure plate. A thickened clamping surface is provided on the base corresponding to the lower part of the lower pressure plate. A clamping and yielding portion is provided between the locking arc seat and the lower pressure plate. The sleeve structure is divided into a two-section structural design, with the upper part of the inner section open and the lower part of the outer section opened.

9. The disposable CT positioning puncture angle guide according to claim 8, characterized in that: A circular through hole is provided in the middle of the locking arc seat and the lower pressing plate, and a square recessed groove matching a square nail head is provided at the bottom of the lower pressing plate.

10. The disposable CT positioning puncture angle guide according to claim 1, characterized in that: A hydrogel patch is arranged at the lower part of the base.

Images