Protective device used after PICC (Peripherally Inserted Central Catheter) catheterization

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a protective device used after PICC catheterization, the protective device comprises a first rotating shaft seat, one side of the first rotating shaft seat is rotatably connected with a first rotating shaft lantern ring, the protective device further comprises an angle adjusting part, and the angle adjusting part comprises a second rotating shaft seat and a second rotating shaft lantern ring; the second rotating shaft seat is coaxially arranged on the side, away from the first rotating shaft lantern ring, of the first rotating shaft seat, and the second rotating shaft lantern ring is rotationally connected to one side of the second rotating shaft seat. Through cooperation of the multiple stop blocks and the arc-shaped stop grooves, the angle range of relative rotation of the small arm and the large arm of PICC catheterization of a patient can be limited, the phenomena of catheter displacement, distortion, infection and the like are avoided, the differentiated requirements of the patient for limb movement in different recovery stages are met, and the patient recovery efficiency is improved. By adjusting the distance between the first bottom plate, the second bottom plate, the first clamping plate and the second clamping plate, the device can be suitable for patients with arms of different thicknesses, and the good application range is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and particularly relates to a protective device for after PICC catheterization. Background Art

[0002] In the modern medical field, peripherally inserted central catheter (PICC) is a very commonly used treatment method, which is mainly used for patients who need long-term intravenous infusion, chemotherapy, parenteral nutrition support, etc. By inserting the catheter through the peripheral vein and finally reaching the central vein, PICC not only avoids the pain caused by repeated punctures to the patient, but also effectively reduces the irritation of drugs to blood vessels, greatly improving the safety and convenience of treatment.

[0003] However, the management of limb movement of patients after PICC catheterization faces severe challenges. After catheterization, the relative rotation of the patient's forearm and upper arm needs to be strictly restricted, because any improper movement may cause catheter displacement, distortion or even extrusion, which will not only interrupt the treatment process, but also may cause serious complications such as infection and thrombosis, posing a major threat to the patient's health. Specifically, at different recovery stages after catheterization, there are clear and detailed requirements for limb movement: on the first day after catheterization, the forearm and upper arm should be kept at 180° as much as possible to minimize the external force on the catheter; within the 2nd to 3rd days, the bending angle of the elbow joint should be controlled not to exceed 45°, at this time the wound has initially healed, but still needs careful protection; by the 4th to 7th days, the bending angle of the elbow joint can be relaxed to not exceed 90°, but still need to move carefully to prevent excessive force.

[0004] Currently, in terms of the protective measures after PICC catheterization, the existing technologies have obvious deficiencies. It mainly relies on the patient's self-restraint to prevent the relative rotation of the upper arm and forearm. However, due to long-term living habits, it is very difficult for patients to completely avoid unconscious limb movements in daily life, such as daily actions like raising the hand, turning around, washing, etc., and the forearm and upper arm will involuntarily rotate relatively, making it difficult for patients to strictly follow the doctor's advice for effective protection. The existing protective products on the market are either single-functional and cannot meet the different requirements for limb movement at different recovery stages; or they are unreasonably designed and uncomfortable to wear, affecting the patient's normal life and resulting in a low willingness of patients to wear. Therefore, there is an urgent need for an innovative protective device that can not only effectively limit the relative rotation of the patient's forearm and upper arm, but also gradually adjust the movement angle according to the recovery process to ensure the smooth progress of PICC catheterization treatment. Summary of the Invention

[0005] The object of the present invention is to provide a protective device for after PICC catheterization. Through the cooperation of a plurality of stop blocks and arc-shaped stop grooves, the angular range of relative rotation between the forearm and the upper arm of the patient with PICC catheterization can be restricted, avoiding phenomena such as catheter displacement, distortion, and infection, and meeting the different requirements for limb activities at different recovery stages of the patient. By adjusting the distances between the first bottom plate, the second bottom plate, the first splint, and the second splint, the device can be applicable to patients with different arm thicknesses and has a good scope of application.

[0006] The technical solution adopted by the present invention is specifically as follows:

[0007] A protective device for after PICC catheterization, including a first rotating shaft seat, one side of the first rotating shaft seat is rotatably connected with a first rotating shaft collar, and further includes:

[0008] An angle adjustment part, the angle adjustment part includes a second rotating shaft seat and a second rotating shaft collar. The second rotating shaft seat is coaxially arranged on the side of the first rotating shaft seat away from the first rotating shaft collar. The second rotating shaft collar is rotatably connected to one side of the second rotating shaft seat. A boss is arranged on one side of the second rotating shaft seat. A plurality of stop blocks are slidably connected inside the boss, and the plurality of stop blocks are circularly distributed inside the boss. An arc-shaped stop groove is opened on one side inside the second rotating shaft collar. One side of the boss is rotatably connected with an adjustment wheel, and the stop blocks are adapted to the arc-shaped stop groove and the adjustment wheel respectively;

[0009] Two splint mechanisms, one splint mechanism is assembled between the first rotating shaft seat and the second rotating shaft seat, and the other splint mechanism is assembled between the first rotating shaft collar and the second rotating shaft collar;

[0010] Wherein, operating the adjustment wheel can drive a plurality of stop blocks to sequentially move out of the boss. Through the cooperation of the plurality of stop blocks and the arc-shaped stop groove, the rotation angle range of the second rotating shaft seat relative to the second rotating shaft collar is adjusted.

[0011] In a preferred solution, a U-shaped avoidance groove is opened inside the stop block, a driving block is fixed on the outer side of the adjustment wheel, and the driving block is adapted to the U-shaped avoidance groove.

[0012] In a preferred solution, a linkage shaft rod is fixed inside the second rotating shaft seat, a plurality of elastic elements are fixed on the outer side of the linkage shaft rod, and the plurality of elastic elements are respectively adapted to the plurality of stop blocks. Among them, the elastic elements are always in a stretched state.

[0013] In a preferred embodiment, a gear position disc is fixed to the outer side of the linkage shaft rod. A plurality of scale marks are provided on one side of the gear position disc. An observation window is provided inside the adjusting rotary wheel, and the observation window is adapted to the gear position disc, the driving block and the gear position disc, and the scale marks and the stop block.

[0014] In a preferred embodiment, a threaded section is provided on one side of the linkage shaft rod and on one side of the adjusting rotary wheel. A positioning nut is threadedly connected to the outer side of the threaded section. When the positioning nut is in close contact with the adjusting rotary wheel, the adjusting rotary wheel can be clamped and limited by the cooperation of the threaded section and the positioning nut.

[0015] In a preferred embodiment, the central angle range of the arc-shaped stop groove is 0 to 180°.

[0016] In a preferred embodiment, the clamping plate mechanism includes a first bottom plate and a second bottom plate. A plurality of first finger rods and a plurality of second finger rods are respectively provided on the sides of the first bottom plate and the second bottom plate that are close to each other, and the plurality of first finger rods and the plurality of second finger rods are alternately distributed. Guide blocks and guide grooves are provided at both ends of the first finger rods and the second finger rods, and adjacent first finger rods and second finger rods are slidably connected through the cooperation of the guide blocks and the guide grooves. A first clamping plate is slidably connected to the upper end of the first bottom plate, and a second clamping plate is slidably connected to the upper end of the second finger rod. A plurality of first through holes are provided inside the first clamping plate, and a plurality of second through holes are provided inside the second clamping plate. A plurality of straps are fixed to the side of the second bottom plate away from the first bottom plate, and the plurality of straps are adapted to the plurality of second through holes and the plurality of straps and the plurality of first through holes one by one.

[0017] In a preferred embodiment, a plurality of T-shaped guide rods are fixed to the upper ends of the first bottom plate and the second bottom plate. A plurality of guide chutes are provided inside the first clamping plate and the second clamping plate, and the plurality of T-shaped guide rods are adapted to the plurality of guide chutes one by one.

[0018] In a preferred embodiment, a hook-and-loop tape and a fleece tape are fixed to the upper end of the strap, and the hook-and-loop tape and the fleece tape are adapted to each other.

[0019] In a preferred embodiment, a protective tape is fixed to the lower end of the strap. A plurality of anti-slip lines are evenly provided at the lower end of the protective tape. The material of the protective tape is one of the following substances: rubber, silica gel, EVA.

[0020] The technical effects achieved by the present invention are:

[0021] By rotating and adjusting the adjusting wheel, the present invention can drive a plurality of stop blocks to slide out of the inside of the boss in sequence. Through the cooperation of the plurality of stop blocks and the arc-shaped stop grooves, the angular range of relative rotation between the second rotating shaft seat and the second rotating shaft collar can be restricted and adjusted, and further, the angular range of relative rotation between the forearm and the upper arm of the patient with PICC catheterization can be restricted, avoiding large-angle relative rotation between the forearm and the upper arm of the patient under living habits or unconscious conditions, which may cause phenomena such as catheter displacement, distortion, and infection. At the same time, it can also meet the different differential needs of the patient for limb activities at different recovery stages;

[0022] By pushing the first bottom plate and the second bottom plate, the present invention can adjust the distances between the first bottom plate and the second bottom plate, the first bottom plate and the first clamping plate, and the second bottom plate and the second clamping plate, so that the clamping plate mechanism can be applicable to patients with different arm thicknesses, improving the applicable range of the device. At the same time, through the cooperation of the binding belt, the shooting hook belt and the fleece belt, the two clamping plate mechanisms can be respectively fixed on the upper arm and the forearm of the patient, avoiding relative displacement between the angle adjustment part and the elbow joint. Brief Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0024] Figure 2 is a rear view of the whole structure of the present invention;

[0025] Figure 3 is a schematic structural diagram of the whole angle adjustment part of the present invention;

[0026] Figure 4 is a lateral structural sectional view of the angle adjustment part of the present invention;

[0027] Figure 5 is a vertical structural sectional view of the angle adjustment part of the present invention;

[0028] Figure 6 is an exploded schematic structural diagram of the angle adjustment part of the present invention;

[0029] Figure 7 is a schematic structural diagram of the clamping plate mechanism of the present invention;

[0030] Figure 8 is an exploded schematic structural diagram of the clamping plate mechanism of the present invention;

[0031] Figure 9 is the present invention Figure 8 partial enlarged schematic diagram at A in;

[0032] Figure 10 is a schematic structural diagram of the binding belt of the present invention.

[0033] In the drawings, the list of components represented by each reference numeral is as follows:

[0034] 100, the first rotating shaft seat; 101, the first rotating shaft collar;

[0035] 200, the angle adjustment part;

[0036] 201, the second rotating shaft seat; 202, the second rotating shaft collar; 203, the convex platform; 204, the stop block; 205, the arc-shaped stop groove; 206, the adjustment wheel; 207, the driving block; 208, the U-shaped avoidance groove; 209, the linkage shaft rod; 210, the elastic element; 211, the gear position plate; 212, the observation window; 213, the threaded section; 214, the positioning nut;

[0037] 300, the clamping plate mechanism;

[0038] 301, the first bottom plate; 302, the second bottom plate; 303, the first finger fork rod; 304, the second finger fork rod; 305, the guide block; 306, the guide groove; 307, the first clamping plate; 308, the second clamping plate; 309, the first through hole; 310, the second through hole; 311, the binding band; 312, the T-shaped guide rod; 313, the shooting hook band; 314, the fluff-catching band; 315, the protective band. Detailed implementation manners

[0039] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0040] In the following description, many specific details are set forth to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0041] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present invention. The phrase "in a preferred implementation manner" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or selectively exclusive embodiment with other embodiments.

[0042] Thirdly, the present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the convenience of explanation, the cross-sectional views showing the device structures will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0043] Please refer to the appendix Figures 1 to 6As shown in the figure, this is the first embodiment of the present invention. This embodiment provides a protection device for after PICC catheterization, including a first rotating shaft seat 100. One side of the first rotating shaft seat 100 is rotatably connected to a first rotating shaft collar 101 through a ball bearing. It also includes:

[0044] An angle adjustment part 200. The angle adjustment part 200 includes a second rotating shaft seat 201 and a second rotating shaft collar 202. The second rotating shaft seat 201 is coaxially arranged on the side of the first rotating shaft seat 100 away from the first rotating shaft collar 101. The second rotating shaft collar 202 is rotatably connected to one side of the second rotating shaft seat 201. A boss 203 is integrally formed on one side of the second rotating shaft seat 201. The outer wall of the boss 203 fits with the inner wall of the second rotating shaft collar 202. The second rotating shaft seat 201 and the second rotating shaft collar 202 are rotatably connected through the boss 203. A plurality of anti-rotation sliding grooves are opened inside the boss 203. A plurality of anti-stop blocks 204 are slidably connected inside the plurality of anti-rotation sliding grooves, and the plurality of anti-stop blocks 204 are circularly distributed inside the boss 203. An arc-shaped anti-stop groove 205 is opened on one side inside the second rotating shaft collar 202. The radius of the inner wall of the arc-shaped anti-stop groove 205 is greater than the radius of the inner wall of the second rotating shaft collar 202. A cover plate is fixed on one side of the second rotating shaft collar 202. One side of the boss 203 is rotatably connected to an adjustment rotary wheel 206, and the adjustment rotary wheel 206 is rotatably connected to the cover plate. A U-shaped handle is integrally formed on one side of the adjustment rotary wheel 206, and the anti-stop blocks 204 and the arc-shaped anti-stop groove 205 as well as the anti-stop blocks 204 and the adjustment rotary wheel 206 are all mutually adapted;

[0045] Two splint mechanisms 300. One splint mechanism 300 is assembled between the first rotating shaft seat 100 and the second rotating shaft seat 201 and is denoted as the first positioning component 300A. The other splint mechanism 300 is assembled between the first rotating shaft collar 101 and the second rotating shaft collar 202 and is denoted as the second positioning component 300B, and the two splint mechanisms 300 are respectively adapted to the patient's forearm and upper arm;

[0046] Among them, in the initial state, the anti-stop blocks 204 are completely located inside the boss 203. Rotating the adjustment rotary wheel 206 can drive the plurality of anti-stop blocks 204 to move out of the boss 203 in sequence, and only one anti-stop block 204 moves out of the boss 203 each time. Through the cooperation of the plurality of anti-stop blocks 204 and the arc-shaped anti-stop groove 205, the rotation angle range of the second rotating shaft seat 201 relative to the second rotating shaft collar 202 is adjusted.

[0047] It should be noted that in the initial state, the included angle between the two splint mechanisms 300 is 180°.

[0048] Further, in order to more accurately describe the working process of the present device, the "elbow flexion angle" involved in this embodiment represents the angle between the upper arm and the lower arm (i.e., the elbow joint bending angle), and the "upper arm" and "lower arm" involved represent the upper arm and the lower arm corresponding to the PICC catheterization arm. Further, in order to distinguish the rotation direction of the lower arm relative to the upper arm, in this embodiment, taking the patient's left hand catheterization as an example, among them, the first positioning assembly 300A is adapted to the lower arm, and the second positioning assembly 300B is adapted to the upper arm.

[0049] In this embodiment, after the patient undergoes PICC catheterization, the elbow flexion angle of the patient is maintained at 180°, and the lower arm and the upper arm are respectively placed inside the two splint mechanisms 300, and the elbow joint corresponds to the angle adjustment part 200. The two splint mechanisms 300 are respectively fixed on the upper arm and the lower arm to prevent relative movement between the angle adjustment part 200 and the elbow joint. Rotate the adjustment wheel 206, and drive a stop block 204 to move out of the inside of the boss 203 (partially move out) through the adjustment wheel 206. When the patient's lower arm rotates towards the upper arm, since the first positioning assembly 300A is fixed on the lower arm, the first positioning assembly 300A is driven to rotate synchronously by the lower arm. The first positioning assembly 300A drives the first rotating shaft seat 100 and the second rotating shaft seat 201 to rotate synchronously. Since the stop block 204 is slidably connected to the inside of the boss 203, the boss 203 and the stop block 204 are driven to rotate synchronously by the second rotating shaft seat 201. When the stop block 204 that has moved out of the inside of the boss 203 fits with the end of the arc-shaped stop groove 205, through the cooperation of the stop block 204 and the arc-shaped stop groove 205, the second rotating shaft seat 201 is limited, and further the first positioning assembly 300A and the lower arm are limited, preventing the first positioning assembly 300A and the lower arm from continuing to rotate towards the upper arm. Furthermore, through the cooperation of multiple stop blocks 204 and arc-shaped stop grooves 205, the device can limit the angle range of relative rotation between the patient's lower arm and upper arm, avoiding large-angle relative rotation between the lower arm and the upper arm in the patient's living habits or unconsciously, causing phenomena such as catheter displacement, distortion, and infection. At the same time, it can also meet the different needs for limb activities in different recovery stages.

[0050] It should be noted that considering the physiological structure of the human body, objectively, when the elbow flexion angle between the left lower arm and the upper arm is 180°, the lower arm can only rotate clockwise towards the upper arm. During the actual use of the device, the upper arm can be adapted to any one of the splint mechanisms 300, and the lower arm is adapted to the other splint mechanism 300. The priority principle should ensure that the U-shaped handle on the adjustment wheel 206 is far from the patient's chest area to avoid the U-shaped handle pressing against the chest area.

[0051] In a specific embodiment, please refer to Figure 5As shown, the number of the stop blocks 204 is 5, and the included angle between the central axes of two adjacent stop blocks 204 is 45°. The multiple stop blocks 204 start from the one at the lowermost end and are sequentially numbered as a, b, c, d, e in the clockwise direction. Among them, when the elbow flexion angle of the patient is in the 180° state, after a slides out of the inside of the boss 203, the rotation angle range of the forearm and the first positioning assembly 300A is 0 to 180°; when in a certain state, after b slides out of the inside of the boss 203, the rotation angle range of the forearm and the first positioning assembly 300A is 0 to 135°; when in a certain state, after c slides out of the inside of the boss 203, the rotation angle range of the forearm and the first positioning assembly 300A is 0 to 90°; when in a certain state, after d slides out of the inside of the boss 203, the rotation angle range of the forearm and the first positioning assembly 300A is 0 to 45°; when in a certain state, after e slides out of the inside of the boss 203, the rotation angle range of the forearm and the first positioning assembly 300A is 0° (that is, the angle between the forearm and the upper arm remains 180°). Of course, the number of the stop blocks 204 and the included angle between the central axes of two adjacent stop blocks 204 can be adjusted according to the actual clinical needs, and no specific limitation is formed here.

[0052] In another specific embodiment, on the first day after PICC catheterization, the forearm and the upper arm of the patient should be kept as close to 180° as possible. Rotate the adjustment wheel 206 to drive e to slide out from inside the boss 203. Through the cooperation of e and the arc-shaped stop groove 205, relative rotation between the second rotating shaft seat 201 and the second rotating shaft collar 202 is avoided, thereby preventing the forearm from rotating relative to the upper arm and minimizing the external force on the catheter to the greatest extent. On the 2nd to 3rd day, the bending angle of the elbow joint should be controlled not to exceed 45°. Rotate the adjustment wheel 206 to drive d to slide out from inside the boss 203 and e to reset. Through the cooperation of d and the arc-shaped stop groove 205, the relative rotation angle range between the second rotating shaft seat 201 and the second rotating shaft collar 202 is controlled within 0 to 45°. By the 4th to 7th day, the bending angle of the elbow joint can be relaxed to not exceed 90°. Rotate the adjustment wheel 206 to drive c to slide out from inside the boss 203 and d to reset. Through the cooperation of c and the arc-shaped stop groove 205, the relative rotation angle range between the second rotating shaft seat 201 and the second rotating shaft collar 202 is controlled within 0 to 90°. According to the patient's recovery situation, rotate the adjustment wheel 206 to drive b to slide out from inside the boss 203 and c to reset. Through the cooperation of b and the arc-shaped stop groove 205, the relative rotation angle range between the second rotating shaft seat 201 and the second rotating shaft collar 202 is controlled within 0 to 135°. Rotate the adjustment wheel 206 to drive a to slide out from inside the boss 203 and b to reset. Through the cooperation of a and the arc-shaped stop groove 205, the relative rotation angle range between the second rotating shaft seat 201 and the second rotating shaft collar 202 is controlled within 0 to 180°.

[0053] Secondly, please refer to Figures 4 to 6 again. A U-shaped relief groove 208 is formed inside the stop block 204. A driving block 207 is fixed to the outside of the adjustment wheel 206, and the driving block 207, the U-shaped relief groove 208, the adjustment wheel 206, and the U-shaped relief groove 208 are all mutually adapted.

[0054] It should be noted that the cross-sectional shape of the driving block 207 is approximately a right trapezoid.

[0055] In this embodiment, when the adjusting wheel 206 is rotated to drive the stopper 204 to slide out of the inside of the boss 203, due to the fixed connection between the adjusting wheel 206 and the driving block 207, the adjusting wheel 206 drives the driving block 207 to rotate synchronously. When the driving block 207 is in contact with the U-shaped avoidance groove 208, the U-shaped avoidance groove 208 drives the stopper 204 to move outward relative to the boss 203, so that the rotation angle range of the second rotating shaft seat 201 relative to the second rotating shaft collar 202 can be adjusted by the plurality of stoppers 204 and the arc-shaped stopper grooves 205, enabling the device to achieve the purpose of restricting and adjusting the rotation range of the forearm.

[0056] Next, please also refer to Figure 4 and Figure 6 , a linkage shaft rod 209 is fixed inside the second rotating shaft seat 201, and a plurality of elastic elements 210 are fixed on the outer side of the linkage shaft rod 209, and the plurality of elastic elements 210 are in one-to-one correspondence with the plurality of stoppers 204. Among them, the elastic element 210 is always in a stretched state.

[0057] It should be noted that when the driving block 207 comes into contact with the U-shaped avoidance groove 208 inside any one of the stoppers 204, the driving block 207 is in a state of being disengaged from the adjacent stoppers 204. Preferably, the elastic element 210 is a helical spring.

[0058] In this embodiment, when the adjusting wheel 206 is rotated, the plurality of stoppers 204 are driven to slide out of the inside of the boss 203 in sequence by the adjusting wheel 206. When the adjusting wheel 206 is disengaged from the U-shaped avoidance groove 208 inside any one of the stoppers 204, the stopper 204 is reset under the action of the elastic element 210 and moves back into the inside of the boss 203.

[0059] Secondly, please refer to Figure 6 again. A gear position plate 211 is fixed on the outer side of the linkage shaft rod 209. A plurality of scale marks are provided on one side of the gear position plate 211. An observation window 212 is provided inside the adjusting wheel 206. An observation plate is fixed inside the observation window 212. The material of the observation plate is a transparent material, and the observation window 212 is adapted to the gear position plate 211, the driving block 207 is adapted to the gear position plate 211, and the scale marks are adapted to the stoppers 204.

[0060] Specifically, the material of the observation plate can be any one of the following materials: PC, acrylic, tempered glass or other transparent materials.

[0061] It should be noted that the scale marks are used to indicate the maximum rotation angle value that the corresponding stopper 204 can rotate inside the arc-shaped stopper groove 205 after sliding out of the inside of the boss 203.

[0062] In this embodiment, when the adjustment wheel 206 is rotated to drive any one of the stop blocks 204 to slide out of the boss 203, the adjustment wheel 206 will synchronously drive the observation window 212 to move, so that the adjustment wheel 206 drives the observation window 212 to rotate relative to the gear plate 211. Through the cooperation of the gear plate 211 and the observation window 212, it is convenient for the user to quickly judge the position of the stop block 204 moving out of the boss 203, and then judge the angular rotation range of the first positioning assembly 300A relative to the second positioning assembly 300B.

[0063] In a specific embodiment, the scale markings are arranged on the surface of the gear plate 211 in the form of angles, such as: 0°, 45°, 90°, 135°, and 180°. Among them, the markings of 180° correspond to a, the markings of 135° correspond to b, the markings of 90° correspond to c, the markings of 45° correspond to d, and the markings of 0° correspond to a. By observing the scale markings, the rotatable angle range between the first positioning assembly 300A and the second positioning assembly 300B can be adjusted.

[0064] Please refer to again Figure 6 , a threaded section 213 is provided on one side of the linkage shaft rod 209 and on one side of the adjustment wheel 206. A positioning nut 214 is threadedly connected to the outside of the threaded section 213. When the positioning nut 214 is in close contact with the adjustment wheel 206, the adjustment wheel 206 can be clamped and limited through the cooperation of the threaded section 213 and the positioning nut 214.

[0065] It should be noted that during the use of the device, the side of the gear plate 211 away from the second rotating shaft seat 201 is always in close contact with the inner side surface of the adjustment wheel 206 (as Figure 4 shown).

[0066] In this embodiment, when it is necessary to adjust the rotation range of the small arm, the positioning nut 214 is rotated so that the positioning nut 214 is no longer in close contact with the adjustment wheel 206. The adjustment wheel 206 is rotated by the U-shaped handle to drive a stop block 204 to move out of the boss 203. After the specified stop block 204 slides out of the boss 203, the positioning nut 214 is rotated in the reverse direction so that the positioning nut 214 is in close contact with the adjustment wheel 206 again. Through the cooperation of the threaded section 213 and the positioning nut 214, the adjustment wheel 206 is clamped and limited, so that the adjustment wheel 206 cannot rotate relative to the second rotating shaft seat 201. When the small arm drives the second rotating shaft seat 201 to rotate synchronously, the adjustment wheel 206 does not rotate relative to the second rotating shaft seat 201, resulting in a change in the rotation angle range of the small arm.

[0067] In a preferred embodiment, the central angle range of the arc-shaped stop groove 205 is 0 to 180°.

[0068] Please refer to again Figures 7 to 9 , the splint mechanism 300 includes a first base plate 301 and a second base plate 302. On the sides of the first base plate 301 and the second base plate 302 close to each other, a plurality of first finger bars 303 and a plurality of second finger bars 304 are respectively arranged. The plurality of first finger bars 303 and the plurality of second finger bars 304 are alternately distributed. Guide blocks 305 and guide grooves 306 are arranged at both ends of the first finger bar 303 and the second finger bar 304. Adjacent first finger bar 303 and second finger bar 304 are slidably connected through the cooperation of the guide block 305 and the guide groove 306. A first splint 307 is slidably connected to the upper end of the first base plate 301, and a second splint 308 is slidably connected to the upper end of the second finger bar 304. A plurality of first through holes 309 are formed inside the first splint 307, and a plurality of second through holes 310 are formed inside the second splint 308. A plurality of straps 311 are fixed to the side of the second base plate 302 away from the first base plate 301. The plurality of straps 311 are respectively adapted to the plurality of second through holes 310 and the plurality of first through holes 309. A hook strap 313 and a fluff-catching strap 314 are fixed to the upper end of the strap 311, and the hook strap 313 and the fluff-catching strap 314 are adapted to each other. Among them, in the first positioning assembly 300A, the first splint 307 is fixedly connected to the first rotating shaft collar 101, and the second splint 308 is fixedly connected to the second rotating shaft seat 201. In the second positioning assembly 300B, the first splint 307 is fixedly connected to the first rotating shaft seat 100, and the second splint 308 is fixedly connected to the second rotating shaft collar 202.

[0069] Furthermore, a plurality of T-shaped guide rods 312 are fixed to the upper ends of the first base plate 301 and the second base plate 302. A plurality of guide chutes are formed inside the first splint 307 and the second splint 308. The plurality of T-shaped guide rods 312 are respectively adapted to the plurality of guide chutes. The cross-sectional shape of the guide chute is an inverted T shape to prevent the T-shaped guide rod 312 from disengaging from the guide chute.

[0070] It should be noted that in this embodiment, the extending direction of the central axis of the first rotating shaft seat 100 is denoted as the width, and the vertical connection direction between the center point of the first rotating shaft seat 100 and the first finger bar 303 is denoted as the depth.

[0071] In this embodiment, since the thicknesses of patients' arms vary, when it is necessary to adjust the width and depth of the splint mechanism 300 to fit the patient's arm, move the first base plate 301 so that the first base plate 301 moves closer to or away from the second base plate 302 to adjust the width of the splint mechanism 300. Move the first base plate 301 and the second base plate 302 so that the first base plate 301 and the second base plate 302 move closer to or away from the first splint 307 and the second splint 308 to adjust the depth of the splint mechanism 300. By adjusting the width and depth of the splint mechanism 300, the device can be applied to patients with different arm thicknesses, improving the applicable range of the device. After the adjustment of the splint mechanism 300 is completed, the end of the strap 311 away from the T-shaped guide rod 312 is sequentially passed through the interior of the second through hole 310 and the first through hole 309 so that the strap 311 is in a straightened state. Bond the hook-and-loop tape 313 to the fleece tape 314. Through the cooperation of the strap 311, the hook-and-loop tape 313 and the fleece tape 314, the splint mechanism 300 is fixed to the patient's arm to prevent the angle adjustment part 200 from moving relative to the elbow joint.

[0072] Please refer to Figure 10 As shown, a protective belt 315 is fixed to the lower end of the strap 311. A plurality of anti-slip lines are evenly formed in the lower end of the protective belt 315. The material of the protective belt 315 is one of the following substances: rubber, silica gel, EVA or other flexible materials.

[0073] Furthermore, protective belts 315 are also fixed to the upper ends of the first finger fork rod 303 and the second finger fork rod 304.

[0074] In this embodiment, the arrangement of the protective belt 315 and the anti-slip lines can increase the friction between the protective belt 315 and the skin of the patient's arm, preventing the device from moving downward under the action of gravity when the patient is in the treatment state.

[0075] The working principle of the present invention is as follows:

[0076] After the patient undergoes PICC catheterization, keep the elbow flexion angle of the patient at 180°. Place the forearm and upper arm inside two splint mechanisms 300 respectively. Move the first base plate 301 and the second base plate 302 to adjust the depth and width of the splint mechanism 300 according to the patient's arm. After the splint mechanism 300 is adjusted, make the elbow joint correspond to the angle adjustment part 200. Fix the two splint mechanisms 300 to the upper arm and forearm respectively through the cooperation of the strap 311, the shooting hook strap 313 and the fleece-catching strap 314 to prevent relative movement between the angle adjustment part 200 and the elbow joint. Rotate the adjustment wheel 206 to drive a stop block 204 to move out of the inside of the boss 203 through the adjustment wheel 206. When the patient's forearm rotates towards the direction close to the upper arm, the first rotating shaft seat 100 of the forearm and the second rotating shaft seat 201 rotate synchronously. Since the stop block 204 is slidably connected to the inside of the boss 203, the second rotating shaft seat 201 drives the boss 203 and the stop block 204 to rotate synchronously. When the stop block 204 that has moved out of the inside of the boss 203 fits with the end of the arc-shaped stop groove 205, through the cooperation of the stop block 204 and the arc-shaped stop groove 205, the second rotating shaft seat 201 is limited, and then the forearm is limited to prevent the forearm from continuing to rotate towards the direction close to the upper arm. Furthermore, through the cooperation of multiple stop blocks 204 and arc-shaped stop grooves 205, the device can limit and adjust the angle range of relative rotation between the patient's forearm and upper arm, avoiding large-angle relative rotation between the forearm and upper arm in the patient's living habits or unconsciously, which may cause phenomena such as catheter displacement, distortion, and infection.

[0077] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specifically stated and limited, are implemented according to the conventional means in the art.

Claims

1. A protective device for PICC placement, characterized in that: The invention comprises a first rotating shaft seat (100), one side of which is rotatably connected to a first rotating shaft collar (101), and further comprises: The angle adjustment part (200) comprises a second rotating shaft seat (201) and a second rotating shaft collar (202), wherein the second rotating shaft seat (201) is coaxially arranged on a side of the first rotating shaft seat (100) away from the first rotating shaft collar (101), the second rotating shaft collar (202) is rotatably connected to one side of the second rotating shaft seat (201), and a boss (203) is arranged on one side of the second rotating shaft seat (201), wherein the boss (203) A plurality of stop blocks (204) are slidably connected inside the boss (203), and the plurality of stop blocks (204) are distributed in an arc shape inside the boss (203); an arc-shaped stop groove (205) is provided on one side inside the second rotating shaft collar (202); an adjusting rotary wheel (206) is rotatably connected on one side of the boss (203), and the stop blocks (204) and the arc-shaped stop groove (205) as well as the stop blocks (204) and the adjusting rotary wheel (206) are adapted to each other; Two clamping plate mechanisms (300), one of the clamping plate mechanisms (300) is assembled between the first rotating shaft seat (100) and the second rotating shaft seat (201), and the other of the clamping plate mechanisms (300) is assembled between the first rotating shaft collar (101) and the second rotating shaft collar (202); The operation of the adjusting wheel (206) can drive the plurality of stop blocks (204) to move out from the inside of the boss (203) in sequence, and the rotation angle range of the second rotating shaft seat (201) relative to the second rotating shaft collar (202) can be adjusted through the cooperation of the plurality of stop blocks (204) and the arc-shaped stop grooves (205).

2. A protective device for PICC placement according to claim 1, characterized in that: A U-shaped avoidance groove (208) is provided inside the stop block (204), a driving block (207) is fixed on the outside of the adjusting wheel (206), and the driving block (207) and the U-shaped avoidance groove (208) are matched.

3. The protective device for PICC placement according to claim 1, characterized in that: A linkage shaft (209) is fixed inside the second rotating shaft seat (201), and a plurality of elastic elements (210) are fixed outside the linkage shaft (209), and the plurality of elastic elements (210) and the plurality of stop blocks (204) are matched one by one, wherein the elastic elements (210) are always in a stretched state.

4. The protective device for PICC placement according to claim 3, characterized in that: A gear plate (211) is fixed on the outside of the linkage shaft (209), a plurality of scale marks are provided on one side of the gear plate (211), an observation window (212) is provided inside the adjusting wheel (206), and the observation window (212) and the gear plate (211) are connected to each other. The driving block (207) and the shift plate (211) as well as the scale mark and the stop block (204) are all adapted to each other.

5. The protective device for PICC placement according to claim 3, characterized in that: A threaded section (213) is provided on one side of the linkage shaft (209) and on one side of the adjusting rotary wheel (206). The outer side of the threaded section (213) is threadedly connected to a positioning nut (214). When the positioning nut (214) and the adjusting rotary wheel (206) are tightly fitted, the threaded section (213) and the positioning nut (214) cooperate to form a clamping limit for the adjusting rotary wheel (206).

6. The protective device for PICC placement according to claim 1, characterized in that: The central angle of the arc-shaped retaining groove (205) ranges from 0 to 180°.

7. The protective device for PICC placement according to claim 1, characterized in that: The clamping mechanism (300) comprises a first bottom plate (301) and a second bottom plate (302); a plurality of first interdigitated rods (303) and a plurality of second interdigitated rods (304) are respectively arranged on the sides of the first bottom plate (301) and the second bottom plate (302) close to each other, and the plurality of first interdigitated rods (303) and the plurality of second interdigitated rods (304) are alternately distributed; guide blocks (305) and guide grooves (306) are arranged at both ends of the first interdigitated rods (303) and the second interdigitated rods (304); and adjacent first interdigitated rods (303) and second interdigitated rods (304) are connected to each other through the guide blocks (305) and the guide grooves (306). ), the upper end of the first base plate (301) is slidably connected to a first clamping plate (307), the upper end of the second forked finger rod (304) is slidably connected to a second clamping plate (308), a plurality of first through holes (309) are opened inside the first clamping plate (307), a plurality of second through holes (310) are opened inside the second clamping plate (308), a plurality of straps (311) are fixed to a side of the second base plate (302) away from the first base plate (301), and the plurality of straps (311) and the plurality of second through holes (310) and the plurality of straps (311) and the plurality of first through holes (309) are matched one by one.

8. The protective device for PICC placement according to claim 7, characterized in that: A plurality of T-shaped guide rods (312) are fixed to the upper ends of the first base plate (301) and the second base plate (302), a plurality of guide slots are provided inside the first clamping plate (307) and the second clamping plate (308), and the plurality of T-shaped guide rods (312) and the plurality of guide slots are matched one by one.

9. The protective device for PICC placement according to claim 7, characterized in that: A shooting hook belt (313) and a hair grabbing belt (314) are fixed to the upper end of the binding belt (311), and the shooting hook belt (313) and the hair grabbing belt (314) are matched.

10. The protective device for PICC placement according to claim 7, characterized in that: A protective belt (315) is fixed to the lower end of the binding belt (311), and a plurality of anti-slip grooves are evenly arranged on the lower end of the protective belt (315). The material of the protective belt (315) is one of the following materials: rubber, silicone, and EVA.

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