Hemodialysis needle pulling and pressing anti-leakage hemostasis protector

Abstract

The invention discloses a hemodialysis needle withdrawal pressure anti-leakage hemostasis protector, and relates to the technical field of medical hemostasis instruments, the hemodialysis needle withdrawal pressure anti-leakage hemostasis protector comprises a pressing assembly, the pressing assembly comprises a fixing plate, a protective pad is fixed to the bottom of the fixing plate, a cavity is formed in the protective pad, a pressing block is arranged in the cavity, a connecting plate is fixed to the top of the pressing block, and a first spring is fixed to the top of the connecting plate; a movable plate is fixed to the top end of the first spring, the top of the movable plate is rotationally connected with a threaded sleeve, and a movable column is in threaded connection in the threaded sleeve. The device has the advantages that by arranging the pressing assembly, constant pressing force can be applied to a needle eye, it can be ensured that the pressing force accurately matches the clinical hemostasis standard, the defect of force fluctuation caused by manual pressing is avoided, the problems of needle eye errhysis and subcutaneous extravasated blood caused by insufficient pressure are solved, blood vessels and peripheral soft tissue are prevented from being damaged by too large pressure, and the hemostatic effect is improved. The risk of complications such as angiosclerosis and hematoma is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical hemostatic devices, and in particular to a hemostatic protective device for preventing leakage during needle removal in hemodialysis. Background Technology

[0002] Hemodialysis is a core treatment for patients with end-stage renal disease. After the needle is removed at the end of treatment, precise and constant pressure needs to be applied to the puncture site for a long time to achieve effective hemostasis and avoid complications such as subcutaneous bleeding and hematoma. Currently, the mainstream hemostasis method in clinical practice is manual pressure combined with elastic bandage. This method relies on operational experience and the performance of consumables, and has many inherent defects in practical application, making it difficult to meet clinical needs.

[0003] First, the accuracy and controllability of the pressure are poor. The pressure and location depend entirely on the manual operation of medical staff or patients, which is prone to pressure deviation and cannot be accurately applied to the needle site. Moreover, the pressure is difficult to keep constant. Excessive pressure can damage blood vessels and surrounding soft tissues, while insufficient pressure cannot stop bleeding, both of which can easily lead to oozing. Second, the elasticity is not durable. Traditional elastic bandages are mostly made of elastic fiber materials, which are prone to elastic fatigue after prolonged use. The elasticity decreases rapidly and cannot maintain effective bandaging pressure, resulting in a significant increase in the risk of oozing later. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the above and / or existing hemodialysis needle removal pressure anti-leakage hemostatic protective devices, the present invention is proposed.

[0006] Therefore, the problem that this invention aims to solve is that the hemostasis method of manual pressure combined with elastic bandage has the disadvantages of poor pressure accuracy and controllability, and easy fatigue and decay of elasticity.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a hemodialysis needle removal pressure anti-leakage hemostatic protective device, comprising a pressing assembly including a fixed plate, a protective pad fixed to the bottom of the fixed plate, a chamber formed inside the protective pad, a pressing block disposed inside the chamber, a connecting plate fixed to the top of the pressing block, a first spring fixed to the top of the connecting plate, a movable plate fixed to the top of the first spring, a threaded sleeve rotatably connected to the top of the movable plate, a movable column threadedly connected inside the threaded sleeve, a rotating sleeve rotatably connected to the top of the fixed plate, a first fixed shaft fixed inside the rotating sleeve, a first spiral groove formed on the movable column, the first fixed shaft sliding within the first spiral groove, and Velcro fasteners fixed to both sides of the fixed plate.

[0008] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: the pressing component further includes a locking member, the locking member includes a fixing frame fixed to the top of the fixing plate, a locking block is provided in the fixing frame, a locking groove is provided on the rotating sleeve, the locking block engages with the locking groove, and a second spring is fixed on one side of the locking block.

[0009] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, it further includes a fastening component disposed in the cavity, including a fastener, the fastener including a rotating sleeve located outside the threaded sleeve, a first slider fixed inside the rotating sleeve, a first groove opened on the threaded sleeve, the first slider sliding in the first groove, a connecting sleeve disposed outside the rotating sleeve, a torsion spring fixed between the rotating sleeve and the connecting sleeve, a support sleeve rotatably connected to the top of the rotating sleeve, and the support sleeve being fixed to the inner wall of the cavity through a connecting rod.

[0010] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: a worm gear is fixed on the outside of the connecting sleeve, a worm is provided on one side of the worm gear, the end of the worm extends through to the outside of the protective pad, and a stabilizing block is rotatably connected to the outside of the worm.

[0011] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: the fastening component further includes a limiting member, the limiting member includes a positioning rod fixed to the top of the support sleeve, a limiting post is inserted into the positioning rod, a limiting hole is opened on the rotating sleeve, a fixing block is fixed at the top of the limiting post, a third spring is fixed at the bottom of the fixing block, and the bottom end of the third spring is fixed to the positioning rod.

[0012] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: a telescopic frame is rotatably connected to the outside of the worm gear, a telescopic rod is fixed at one end of the telescopic frame, and a force-bearing block is fixed at the top of the fixed block.

[0013] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: the fastening assembly further includes a squeezing member, the squeezing member includes a rotating column rotatably connected to the top of the connecting plate, a rotating ring is sleeved on the outer side of the rotating column, a second slider is fixed on the inner side of the rotating ring, a second sliding groove is opened on the rotating column, the second slider slides in the second sliding groove, a connecting ring is rotatably connected to the outer side of the rotating ring, a squeezing rod is fixed on one side of the connecting ring, and a squeezing block is fixed at the bottom of the telescopic rod.

[0014] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: a second spiral groove is provided on the rotating column, a second fixed shaft is fixed inside the movable plate, and the second fixed shaft slides in the second spiral groove.

[0015] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: a slide rail is provided on one side of the connecting ring, a plug is engaged on the slide rail, slots are provided on both the rotating ring and the connecting ring, and the slide rail is fixed to the telescopic frame through a connecting column.

[0016] As a preferred embodiment of the hemodialysis needle removal pressure anti-leakage hemostatic protective device of the present invention, wherein: the number of slots is multiple, and they are evenly distributed in a ring on the outside of the rotating ring.

[0017] The beneficial effects of this invention are as follows: by setting the pressing component, a constant pressing pressure can be applied to the needle hole, which can ensure that the pressing pressure accurately matches the clinical hemostasis standard, avoid the defects of manual pressing force fluctuation, eliminate the problems of needle hole bleeding and subcutaneous hematoma caused by insufficient pressure, and prevent excessive pressure from damaging blood vessels and surrounding soft tissues, reducing the risk of complications such as arteriosclerosis and hematoma.

[0018] Furthermore, the fastening components allow for marking of the pressure zones. When the pressure zone decreases, it can automatically increase the pressure zone to maintain effective hemostasis pressure, completely solving the problem of elastic fatigue in traditional bandages. It is especially suitable for elderly patients with slow reactions and for night shift home scenarios, eliminating the need for manual adjustment and significantly reducing the risk of missed bleeding detection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A diagram showing the overall structure of the hemostatic and leak-proof protective gear for needle removal during hemodialysis.

[0021] Figure 2 Diagram of the compression component of the hemostatic and leak-proof protective device for needle removal during hemodialysis.

[0022] Figure 3 Cross-sectional structural diagram of the protective pad of the hemostatic and leak-proof protective device for needle removal during hemodialysis.

[0023] Figure 4 Cross-sectional view of the rotating sleeve of the hemostatic and leak-proof protective device for needle removal during hemodialysis.

[0024] Figure 5 Diagram of the movable plate structure of the hemostatic and leak-proof protective device for needle removal during hemodialysis.

[0025] Figure 6 A cross-sectional view of the threaded sleeve of a hemostatic and leak-proof protective device for needle removal during hemodialysis.

[0026] Figure 7 For removing the needle during hemodialysis, apply a pressure-locking and hemostatic protective device to prevent leakage. Figure 6 Enlarged view of the structure at point A in the middle.

[0027] Figure 8 A structural diagram of the extrusion component of a hemostatic and leak-proof protective device for needle removal during hemodialysis.

[0028] Figure 9 A structural diagram of the compression rod and compression block of the hemostatic protective device used for needle removal and leakage prevention during hemodialysis.

[0029] Figure 10 Cross-sectional structural diagram of the rotating ring and connecting ring of the hemostatic and leak-proof protective device for needle removal during hemodialysis.

[0030] In the diagram: 1. Pressing assembly; 111. Fixing plate; 112. Protective pad; 112-1. Chamber; 113. Pressing block; 114. Connecting plate; 115. First spring; 116. Movable plate; 117. Threaded sleeve; 118. Movable column; 119. Rotating sleeve; 110. First fixed shaft; 118-1. First spiral groove; 111-1. Velcro; 12. Locking element; 121. Fixing frame; 122. Locking block; 119-1. Locking groove; 123. Second spring; 2. Fastening assembly; 21. Fastener; 211. Rotating sleeve; 212. First slider; 117-1. First sliding groove; 213. Connecting sleeve; 214. 215. Torsion spring; 216. Support sleeve; 217. Worm gear; 218. Worm; 219. Stabilizing block; 220. Limiting component; 221. Positioning rod; 222. Limiting post; 211-1. Limiting hole; 223. Fixing block; 224. Third spring; 225. Telescopic frame; 226. Telescopic rod; 227. Force-bearing block; 23. Extrusion component; 231. Rotating column; 232. Rotating ring; 233. Second slider; 231-1. Second slide groove; 234. Connecting ring; 235. Extrusion rod; 236. Extrusion block; 231-2. Second spiral groove; 237. Second fixed shaft; 238. Slide rail; 239. Insert block; 232-1. Slot. Detailed Implementation

[0031] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0034] Example 1, referring to Figures 1-4This is the first embodiment of the present invention. This embodiment provides a hemodialysis needle removal pressure anti-leakage hemostatic protective device. The hemodialysis needle removal pressure anti-leakage hemostatic protective device includes a pressing component 1, including a fixing plate 111. A protective pad 112 is fixed to the bottom of the fixing plate 111. The bottom of the protective pad 112 is arc-shaped and soft, and is used to press on the patient's arm to improve the patient's comfort. A chamber 112-1 is opened in the protective pad 112. The inner wall of the chamber 112-1 is made of a rigid material. A pressing block 113 is provided in the chamber 112-1. The pressing block 113 is a medical silicone pressing head, which is used to press and stop bleeding at the needle hole.

[0035] A connecting plate 114 is fixed to the top of the pressing block 113. A first spring 115 is fixed to the top of the connecting plate 114. A movable plate 116 is fixed to the top of the first spring 115. A threaded sleeve 117 is rotatably connected to the top of the movable plate 116 via a bearing. A movable column 118 is internally threaded to the threaded sleeve 117. The movable column 118 is T-shaped, thicker at the top and thinner at the bottom. A positioning groove is provided on the outer side of the upper section of the movable column 118. A positioning block is fixed inside the fixed plate 111. The positioning block slides in the positioning groove. The two cooperate to limit the movement of the movable column 118 and prevent the movable column 118 from rotating when moving.

[0036] A guide post is fixed to the top wall of the chamber 112-1. The bottom end of the guide post passes through the movable plate 116 and is movably connected to the movable plate 116. It is used to guide and position the movable plate 116 to prevent it from shifting when moving.

[0037] A rotating sleeve 119 is rotatably connected to the top of the fixed plate 111 via a bearing. A rotating rod is fixed to one side of the rotating sleeve 119. A first fixed shaft 110 is fixed inside the rotating sleeve 119. A first spiral groove 118-1 is opened on the movable column 118. The first fixed shaft 110 slides in the first spiral groove 118-1. Hook and loop fasteners 111-1 are fixed to both sides of the fixed plate 111. The hook and loop fasteners 111-1 are elastic.

[0038] Place the protective pad 112 on the patient's arm, align the pressure block 113 with the needle hole, and then secure the protective pad 112 to the arm using Velcro 111-1. At this point, rotating the rotating sleeve 119 causes the first fixed shaft 110 to slide within the first spiral groove 118-1. This interaction causes the movable column 118 to move downwards. The movable column 118, through the threaded sleeve 117, causes the movable plate 116 to move downwards. The movable plate 116, through the first spring 115, pushes the connecting plate 114 and the pressure block 113 downwards. Now, the pressure block 113 can be used to press on the needle hole. As the movable plate 116 continues to move downwards... When the pressure block 113 cannot move further, the movable plate 116 will compress the first spring 115. At this time, the first spring 115 will apply an elastic squeezing force downward to the pressure block 113, making the pressure block 113 fit more firmly with the needle hole, while preventing damage to blood vessels and surrounding soft tissues due to excessive pressure. It can also apply a constant pressure to the needle hole, ensuring that the pressure is accurately matched to the clinical hemostasis standard, eliminating the problems of needle hole bleeding and subcutaneous hematoma caused by insufficient pressure, and preventing damage to blood vessels and surrounding soft tissues due to excessive pressure, thus reducing the risk of complications such as arteriosclerosis and hematoma.

[0039] Specifically, the pressing component 1 also includes a locking element 12, which includes a fixing frame 121 fixed to the top of the fixing plate 111. A locking block 122 is provided inside the fixing frame 121. One side of the locking block 122 is inclined. A slot 119-1 is provided on the rotating sleeve 119. The locking block 122 engages with the slot 119-1. The two cooperate to limit the rotating sleeve 119, thereby preventing the movable column 118 from moving upward and causing the pressing block 113 to change the pressing pressure on the needle eye. There are multiple slots 119-1, which are evenly distributed in an arc shape on the outside of the rotating sleeve 119.

[0040] A second spring 123 is fixed to one side of the locking block 122. The second spring 123 is used to apply a pushing force to the locking block 122, so that the locking block 122 and the locking groove 119-1 are engaged more tightly. A pull rod is fixed to one side of the locking block 122. One end of the pull rod passes through to the outside of the fixed frame 121 and is movably connected to the fixed frame 121. The pull rod can drive the locking block 122 to separate from the locking groove 119-1, thereby releasing the restriction on the rotating sleeve 119 and causing the rotating sleeve 119 to rotate in the opposite direction to reset.

[0041] Example 2, refer to Figures 2-7 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0042] It also includes a fastening assembly 2, which is disposed in the chamber 112-1 and includes a fastener 21. The fastener 21 includes a rotating sleeve 211 located outside the threaded sleeve 117. A first slider 212 is fixed inside the rotating sleeve 211. A first groove 117-1 is provided on the threaded sleeve 117. The first slider 212 slides in the first groove 117-1. The two cooperate to connect the threaded sleeve 117 and the rotating sleeve 211, so that the rotating sleeve 211 can drive the threaded sleeve 117 to rotate, and the threaded sleeve 117 can move up and down inside the rotating sleeve 211.

[0043] A connecting sleeve 213 is provided on the outer side of the rotating sleeve 211. A torsion spring 214 is fixed between the rotating sleeve 211 and the connecting sleeve 213. The two ends of the torsion spring 214 are fixed to the outer side of the rotating sleeve 211 and the inner wall of the connecting sleeve 213, respectively. The elastic force of the torsion spring 214 is greater than that of the first spring 115. A support sleeve 215 is rotatably connected to the top of the rotating sleeve 211. The support sleeve 215 is fixed to the inner wall of the chamber 112-1 through a connecting rod. The support sleeve 215 is used to support and position the rotating sleeve 211, so that the rotating sleeve 211 stays at the current height and can rotate.

[0044] A worm gear 216 is fixed to the outside of the connecting sleeve 213. A worm 217 is provided on one side of the worm gear 216. The worm 217 does not contact the worm gear 216 in the initial state, so it will not hinder the rotation of the connecting sleeve 213. The end of the worm 217 extends to the outside of the protective pad 112. A stabilizing block 218 is rotatably connected to the outside of the worm 217. Movable grooves are provided on both sides of the protective pad 112. The stabilizing block 218 is movably connected to the movable groove, and the connection between the two is relatively tight.

[0045] When the pressing block 113 applies sufficient pressure downward to the needle eye, the worm 217 moves laterally, causing the worm 217 to mesh with the worm wheel 216. Then, the worm 217 is rotated to drive the worm wheel 216 to rotate, which in turn drives the connecting sleeve 213 to rotate, thus tightening and energizing the torsion spring 214. Since the rotating sleeve 211 is in a limited position at this time, the elastic force of the torsion spring 214 will not drive the rotating sleeve 211 to rotate, and the worm wheel 216 will not rotate under the restriction of the worm 217. Therefore, the torsion spring 214 will remain in a tightened state.

[0046] When the pressure of the pressing block 113 on the needle hole decreases, the rotating sleeve 211 will release its restriction. At this time, the elastic force of the torsion spring 214 will drive the rotating sleeve 211 to rotate, and through the rotating sleeve 211, drive the threaded sleeve 117 to rotate. When the threaded sleeve 117 rotates, it will drive the movable plate 116 to move downward. At this time, the movable plate 116 will apply downward pressure to the first spring 115, and through the first spring 115, increase the pressure of the pressing block 113 on the needle hole. When the pressure of the pressing block 113 is restored, the rotating sleeve 211 will lock again, thereby preventing the pressing block 113 from damaging blood vessels and surrounding soft tissues due to excessive pressure.

[0047] The fastening assembly 2 also includes a limiting member 22, which includes a positioning rod 221 fixed to the top of the support sleeve 215. The positioning rod 221 is L-shaped, and a limiting post 222 is inserted into the positioning rod 221. A limiting hole 211-1 is opened on the rotating sleeve 211. There are multiple limiting holes 211-1, which are evenly distributed in a ring on the top of the rotating sleeve 211. A through hole is opened on the top of the support sleeve 215. The bottom end of the limiting post 222 is inserted into the through hole. When the limiting post 222 moves downward and engages with the limiting hole 211-1, the two can lock the rotating sleeve 211, preventing it from rotating.

[0048] A fixing block 223 is fixed to the top of the limiting post 222, and a third spring 224 is fixed to the bottom of the fixing block 223. The bottom end of the third spring 224 is fixed to the positioning rod 221. The third spring 224 is used to apply an upward pushing force to the fixing block 223, so that the fixing block 223 drives the limiting post 222 upward and keeps it separated from the limiting hole 211-1.

[0049] A telescopic frame 225 is rotatably connected to the outside of the worm 217. The lower section of the telescopic frame 225 is annular and is rotatably connected to the outside of the worm 217 via a bearing. The upper section of the telescopic frame 225 is L-shaped and can extend and retract within the lower section. The connection between the two has a strong frictional force, which is greater than the elastic force of the third spring 224.

[0050] One end of the telescopic frame 225 is fixed with a telescopic rod 226. The telescopic rod 226 is divided into an outer tube and an inner rod. One end of the inner rod is sleeved on the outside of the guide column and can move up and down on the outside of the guide column. The inner rod will not move laterally. The outer tube can move laterally on the outside of the inner rod. The upper end of the telescopic frame 225 is fixed to the outer tube.

[0051] A force-bearing block 227 is fixed to the top of the fixed block 223. One side of the top of the force-bearing block 227 is inclined. When the worm 217 moves laterally, it will drive the outer tube of the telescopic rod 226 to move through the telescopic frame 225, and cause the end of the outer tube of the telescopic rod 226 to press against the inclined surface of the force-bearing block 227. This causes the force-bearing block 227 to drive the fixed block 223 and the limiting post 222 to move downward. Then, after the worm 217 meshes with the worm wheel 216, the limiting post 222 will engage with the limiting hole 211-1.

[0052] Example 3, referring to Figures 8-10 This is the third embodiment of the present invention, which is based on the first two embodiments.

[0053] Specifically, the fastening assembly 2 also includes a pressing member 23, which includes a rotating column 231 rotatably connected to the top of the connecting plate 114. The rotating column 231 passes through the movable plate 116 and is movably connected to the movable plate 116. A rotating ring 232 is sleeved on the outer side of the rotating column 231, and a second slider 233 is fixed on the inner side of the rotating ring 232. A second sliding groove 231-1 is opened on the rotating column 231, and the second slider 233 slides in the second sliding groove 231-1. The two cooperate to connect the rotating ring 232 and the rotating column 231, so that the rotating column 231 can drive the rotating ring 232 to rotate, and the rotating column 231 can move up and down in the rotating ring 232.

[0054] A connecting ring 234 is rotatably connected to the outer side of the rotating ring 232. A support ring is rotatably connected to the outer side of the connecting ring 234 via a bearing. The support ring is fixed to the inner wall of the chamber 112-1 via a mounting rod. The support ring is used to support and position the connecting ring 234, keeping it at its current height. A pressing rod 235 is fixed to one side of the connecting ring 234. A pressing block 236 is fixed to the bottom of the telescopic rod 226. The pressing block 236 is fixed to the bottom of the inner rod of the telescopic rod 226. There are two pressing blocks 236, located on both sides of the pressing rod 235. The side of the two pressing blocks 236 closest to the pressing rod 235 is inclined, one inclined downwards and the other inclined upwards.

[0055] The rotating column 231 has a second spiral groove 231-2. The movable plate 116 has a second fixed shaft 237 fixed inside. The second fixed shaft 237 slides in the second spiral groove 231-2. When the pressing block 113 cannot move and the movable plate 116 continues to move and compresses the first spring 115, the relative distance between the movable plate 116 and the connecting plate 114 will be closer. The movable plate 116 will drive the second fixed shaft 237 to slide in the second spiral groove 231-2. The two work together to make the rotating column 231 rotate.

[0056] During prolonged use, if the tightness of the protective pad 112 against the patient's arm decreases due to the patient's touch or the loosening of the Velcro, it indicates that the pressing block 113 will loosen from the needle hole, reducing the pressing pressure on the needle hole. At this time, the first spring 115 will push the connecting plate 114 downward, increasing the relative distance between the connecting plate 114 and the movable plate 116. The second fixed shaft 237 will then slide within the second spiral groove 231-2. Through the cooperation of these two components, the rotating column 231 will rotate, causing the rotating column 231 to drive the rotating ring 232 and the connecting ring. 234 rotates, and through the connecting ring 234, the extrusion rod 235 extrudes the inclined surface of the downward-sloping extrusion block 236, and pushes the telescopic rod 226 to move upward, so that the end of the telescopic rod 226 separates from the force block 227. At this time, the third spring 224 can push the fixed block 223 and the limiting post 222 to move upward, and the limiting post 222 separates from the limiting hole 211-1, thereby releasing the restriction on the rotating sleeve 211. At this time, the elastic force of the torsion spring 214 will drive the rotating sleeve 211 and the threaded sleeve 117 to rotate, and through the threaded sleeve 117, drive the movable plate 116 to move downward.

[0057] When the movable plate 116 moves downward to apply pressure to the first spring 115 and restores the pressure of the pressing block 113 on the needle eye, the relative distance between the movable plate 116 and the connecting plate 114 will close again, and the rotating column 231 will rotate in the opposite direction based on the previous rotation, and drive the pressing rod 235 to press the inclined surface of the upward-sloping pressing block 236. At this time, the pressing block 236 will drive the telescopic rod 226 to move downward, and the telescopic rod 226 will press the force block 227 downward again, and the limiting post 222 will engage with the limiting hole 211-1, locking the rotating sleeve 211 again, to avoid the excessive release of the elastic force of the torsion spring 214, which would cause the pressing block 113 to press the needle eye with excessive force.

[0058] A slide rail 238 is provided on one side of the connecting ring 234. The slide rail 238 is arc-shaped, and a plug 239 is engaged on the slide rail 238. The engagement part between the plug 239 and the slide rail 238 is I-shaped. The slide rail 238 can drive the plug 239 to move, and the plug 239 can also rotate within the slide rail 238. Slots 232-1 are provided on both the rotating ring 232 and the connecting ring 234. The slide rail 238 is fixed to the telescopic frame 225 through a connecting column. There are multiple slots 232-1, which are evenly distributed in a ring on the outside of the rotating ring 232. There is only one slot 232-1 on the connecting ring 234, and it is aligned with the plug 239.

[0059] In the initial state, the insert 239 is not engaged with the slot 232-1. At this time, the rotation of the rotating column 231 will not drive the connecting ring 234 to rotate. When the telescopic frame 225 moves, it will drive the slide rail 238 and the insert 239 to move, and the insert 239 will be inserted into the slot 232-1. The two work together to connect the connecting ring 234 with the rotating ring 232. When the rotating ring 232 rotates, it can drive the connecting ring 234 to rotate, and drive the pressing rod 235 to rotate through the connecting ring 234.

[0060] In use, attach the protective pad 112 to the patient's arm, align the pressing block 113 with the needle hole, and then secure the protective pad 112 to the arm using Velcro 111-1. At this time, rotating the rotating sleeve 119 causes the first fixed shaft 110 to slide within the first spiral groove 118-1. This interaction causes the movable column 118 to move downwards. The movable column 118, through the threaded sleeve 117, causes the movable plate 116 to move downwards. The movable plate 116, through the first spring 115, pushes the connecting plate 114 and the pressing block 113 downwards. At this point, the pressing block 113 can be used to press the needle hole. As the movable plate 116 continues to move downwards... When moving downwards, since the pressing block 113 can no longer move, the movable plate 116 will compress the first spring 115. At this time, the first spring 115 will apply an elastic squeezing force to the pressing block 113 downwards, making the pressing block 113 fit more tightly with the needle hole, while preventing damage to blood vessels and surrounding soft tissues due to excessive pressure. It can also apply a constant pressing pressure to the needle hole, ensuring that the pressing pressure accurately matches the clinical hemostasis standard, eliminating problems such as needle hole bleeding and subcutaneous hematoma caused by insufficient pressure, and preventing damage to blood vessels and surrounding soft tissues due to excessive pressure, thus reducing the risk of complications such as arteriosclerosis and hematoma.

[0061] Simultaneously, the worm 217 moves laterally, engaging with the worm wheel 216. As the worm 217 moves laterally, it drives the outer tube of the telescopic rod 226 to move via the telescopic frame 225, causing the end of the outer tube of the telescopic rod 226 to press against the inclined surface of the force-bearing block 227. This causes the force-bearing block 227 to move the fixed block 223 and the limiting post 222 downwards. After the worm 217 engages with the worm wheel 216, the limiting post 222 engages with the limiting hole 211-1, locking the rotating sleeve 211 through their cooperation. Then, rotating the worm 217 drives the worm wheel 216 to rotate. The movement of the worm gear 216 drives the connecting sleeve 213 to rotate, and the connecting sleeve 213 tightens and charges the torsion spring 214. Since the rotating sleeve 211 is in a limited state at this time, the elastic force of the torsion spring 214 will not drive the rotating sleeve 211 to rotate, and the worm gear 216 will not rotate under the restriction of the worm 217. Therefore, the torsion spring 214 will remain in a tightened state. When the telescopic frame 225 moves, it will drive the slide rail 238 and the insert block 239 to move, and the insert block 239 will be inserted into the slot 232-1. The two work together to connect the connecting ring 234 and the rotating ring 232.

[0062] During prolonged use, if the tightness of the protective pad 112 against the patient's arm decreases due to the patient's touch or the loosening of the Velcro, it indicates that the pressing block 113 will loosen from the needle hole, reducing the pressing pressure on the needle hole. At this time, the first spring 115 will push the connecting plate 114 downward, increasing the relative distance between the connecting plate 114 and the movable plate 116. The second fixed shaft 237 will then slide within the second spiral groove 231-2. Through their cooperation, the rotating column 231 will rotate, causing the rotating column 231 to drive the rotating ring 232 and the connecting ring 234 to rotate. The connecting ring 234 will then drive the pressing rod 235 to press against the downward-sloping pressing block 236, pushing the telescopic rod 226 upward, so that the end of the telescopic rod 226... When the force-bearing block 227 separates, the third spring 224 can push the fixed block 223 and the limiting post 222 upward, and separate the limiting post 222 from the limiting hole 211-1, thereby releasing the restriction on the rotating sleeve 211. At this time, the elastic force of the torsion spring 214 will drive the rotating sleeve 211 and the threaded sleeve 117 to rotate, and the threaded sleeve 117 will drive the movable plate 116 downward. The downward movement of the movable plate 116 applies pressure to the first spring 115 and restores the pressure of the pressing block 113 to the needle hole. Thus, when the pressing pressure is reduced, the pressing pressure can be automatically increased to maintain effective hemostasis pressure. This completely solves the problem of elastic fatigue of traditional bandages. It is especially suitable for elderly patients with slow reaction and night shift home scenarios. No manual adjustment is required, which greatly reduces the risk of missed bleeding detection.

[0063] At the same time, the relative distance between the movable plate 116 and the connecting plate 114 will approach again, and the rotating column 231 will rotate in the opposite direction based on the previous rotation, and drive the pressing rod 235 to press the inclined surface of the upward-sloping pressing block 236. At this time, the pressing block 236 will drive the telescopic rod 226 to move downward, and the telescopic rod 226 will press the force block 227 downward again, and the limiting post 222 will engage with the limiting hole 211-1, locking the rotating sleeve 211 again, to avoid the excessive elastic force released by the torsion spring 214, which would cause the pressing block 113 to press the needle hole with excessive force.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A hemodialysis needle removal pressure leak-proof hemostatic protective device, characterized in that: include, The pressing assembly (1) includes a fixed plate (111), a protective pad (112) fixed to the bottom of the fixed plate (111), a chamber (112-1) opened inside the protective pad (112), a pressing block (113) disposed inside the chamber (112-1), a connecting plate (114) fixed to the top of the pressing block (113), a first spring (115) fixed to the top of the connecting plate (114), a movable plate (116) fixed to the top of the first spring (115), and the movable plate (116) A threaded sleeve (117) is rotatably connected to the top, and a movable column (118) is threadedly connected inside the threaded sleeve (117). A rotating sleeve (119) is rotatably connected to the top of the fixed plate (111), and a first fixed shaft (110) is fixed inside the rotating sleeve (119). A first spiral groove (118-1) is opened on the movable column (118), and the first fixed shaft (110) slides in the first spiral groove (118-1). Velcro (111-1) is fixed on both sides of the fixed plate (111).

2. The hemodialysis needle removal pressure leak-proof hemostatic protective device as described in claim 1, characterized in that: The pressing assembly (1) also includes a locking member (12), which includes a fixing frame (121) fixed to the top of the fixing plate (111), a locking block (122) is provided in the fixing frame (121), a slot (119-1) is provided on the rotating sleeve (119), the locking block (122) engages with the slot (119-1), and a second spring (123) is fixed on one side of the locking block (122).

3. The hemodialysis needle removal pressure anti-leakage hemostatic protective device as described in claim 2, characterized in that: It also includes a fastening assembly (2) disposed in the chamber (112-1), including a fastener (21), the fastener (21) including a rotating sleeve (211) located outside the threaded sleeve (117), a first slider (212) fixed inside the rotating sleeve (211), a first groove (117-1) opened on the threaded sleeve (117), the first slider (212) sliding in the first groove (117-1), a connecting sleeve (213) disposed outside the rotating sleeve (211), a torsion spring (214) fixed between the rotating sleeve (211) and the connecting sleeve (213), a support sleeve (215) rotatably connected to the top of the rotating sleeve (211), and the support sleeve (215) fixed to the inner wall of the chamber (112-1) through a connecting rod.

4. The hemodialysis needle removal pressure anti-leakage hemostatic protective device as described in claim 3, characterized in that: A worm gear (216) is fixed on the outside of the connecting sleeve (213). A worm (217) is provided on one side of the worm gear (216). The end of the worm (217) extends through to the outside of the protective pad (112). A stabilizing block (218) is rotatably connected to the outside of the worm (217).

5. The hemodialysis needle removal pressure leak-proof hemostatic protective device as described in claim 4, characterized in that: The fastening assembly (2) also includes a limiting member (22), which includes a positioning rod (221) fixed to the top of the support sleeve (215). A limiting post (222) is inserted into the positioning rod (221). A limiting hole (211-1) is opened on the rotating sleeve (211). A fixing block (223) is fixed to the top of the limiting post (222). A third spring (224) is fixed to the bottom of the fixing block (223). The bottom end of the third spring (224) is fixed to the positioning rod (221).

6. The hemodialysis needle removal pressure anti-leakage hemostatic protective device as described in claim 5, characterized in that: The worm gear (217) is rotatably connected to a telescopic frame (225), and a telescopic rod (226) is fixed at one end of the telescopic frame (225). A force-bearing block (227) is fixed at the top of the fixing block (223).

7. The hemodialysis needle removal pressure leak-proof hemostatic protective device as described in claim 6, characterized in that: The fastening assembly (2) further includes an extrusion member (23), which includes a rotating column (231) rotatably connected to the top of the connecting plate (114). A rotating ring (232) is sleeved on the outside of the rotating column (231), and a second slider (233) is fixed on the inside of the rotating ring (232). A second groove (231-1) is opened on the rotating column (231), and the second slider (233) slides in the second groove (231-1). A connecting ring (234) is rotatably connected to the outside of the rotating ring (232), and an extrusion rod (235) is fixed on one side of the connecting ring (234). An extrusion block (236) is fixed at the bottom of the telescopic rod (226).

8. The hemodialysis needle removal pressure leak-proof hemostatic protective device as described in claim 7, characterized in that: The rotating column (231) has a second spiral groove (231-2), and the movable plate (116) has a second fixed shaft (237) fixed inside it. The second fixed shaft (237) slides inside the second spiral groove (231-2).

9. The hemodialysis needle removal pressure leak-proof hemostatic protective device as described in claim 7 or 8, characterized in that: A slide rail (238) is provided on one side of the connecting ring (234), and a plug (239) is snapped onto the slide rail (238). Slots (232-1) are provided on both the rotating ring (232) and the connecting ring (234). The slide rail (238) is fixed to the telescopic frame (225) through a connecting column.

10. The hemodialysis needle removal pressure anti-leakage hemostatic protective device as described in claim 9, characterized in that: There are multiple slots (232-1), which are evenly distributed in a ring on the outside of the rotating ring (232).

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