Sting-proof portacath secure puncture indwelling assembly

Abstract

This invention belongs to the field of medical device technology, specifically relating to a puncture-resistant infusion port fixation and indwelling assembly, comprising: an elastic locking ring, which is C-shaped and has a locking mechanism between its two ends; a fixing groove on the outer wall of the elastic locking ring; and secondary plates on both outer walls of the elastic locking ring; a pressing plate, comprising a plate body and two connecting arms; a through hole axially formed on the plate body; two connecting arms symmetrically arranged along the central axis of the plate body and fixedly connected to the plate body; and extension arms whose free ends extend downwards to form extension arms, with fixing teeth on the inner wall of the extension arms; and a puncture needle, comprising a needle seat and a needle body vertically fixed to the needle seat; a gripping part on the needle seat; and the needle body inserted into the through hole. Its purpose is to solve the problem of easy puncture injury to the hands of medical personnel fixing the infusion port puncture seat during needle insertion and removal, caused by existing puncture needle operation methods.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a port-of-care device for preventing puncture wounds. Background Technology

[0002] An implantable venous port is a fully implanted vascular access system, consisting of a catheter tip located in the superior vena cava and a puncture seat implanted under the skin. It provides patients with long-term venous access. The system includes a central venous catheter with a device called a puncture seat at the end of the catheter.

[0003] The procedure involves inserting a catheter subcutaneously into a major vein, such as the subclavian vein or superior vena cava. Part of the catheter is buried in the subcutaneous tissue, while the other end, the puncture seat, is left in the subcutaneous tissue of the chest wall and sutured in place. After the procedure, only a small suture wound is visible on the skin. After healing and suture removal, a protruding round ball can be felt on the patient's skin.

[0004] During treatment, the needle is inserted percutaneously and vertically into the reservoir of the puncture port. This allows for convenient injection, continuous infusion over a long period, and blood collection. It is suitable for high-concentration chemotherapy drugs, total parenteral nutrition, and blood product infusions. Because the catheter tip is located in a large vein, the drug concentration is rapidly diluted, avoiding irritation and damage to the blood vessel wall. Compared to conventional intravenous infusion, it reduces the chance of arteriosclerosis and the pain of repeated needle pricks due to vein malformation. After port-a-cath implantation, patients' daily lives are unrestricted, medication administration is convenient and easy, and quality of life is greatly improved.

[0005] Inserting a port-a-cath involves using a two- or three-finger fixation method to hold the puncture site in place. This can be challenging for nurses performing the procedure for the first time or those who only occasionally use it. The needle insertion area of ​​the puncture site is obstructed by the fingers, reducing the field of vision and making it easier to insert the fingers. Furthermore, because the two- or three-finger fixation method is used to hold the needle insertion area in place, applying excessive force towards the center of the puncture site can cause the fingers to slide relative to the skin, potentially leading to the fingers entering the needle insertion area and resulting in a risk of needle stick injury.

[0006] Furthermore, when the needle needs to be removed from the port after the injection, the fingers are too close to the needle, which can easily cause the medical staff to be pricked by the hand that is holding the port in place. Summary of the Invention

[0007] The purpose of this invention is to provide a puncture-resistant infusion port fixation and indwelling device to solve the problem that medical staff are easily punctured when fixing the infusion port puncture seat during needle insertion and removal due to the existing puncture needle operation method.

[0008] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0009] A puncture-resistant infusion port fixation device includes:

[0010] An elastic locking ring, wherein the elastic locking ring is C-shaped, a locking mechanism is provided between the two ends of the elastic locking ring, and a fixing groove is provided on the outer wall of the elastic locking ring;

[0011] The elastic locking ring has sub-plates on both outer walls;

[0012] The pressing plate includes a plate body and two connecting arms. The plate body has an axial through hole. The two connecting arms are symmetrically arranged along the central axis of the plate body and are fixedly connected to the plate body. The free ends of the two connecting arms extend downward to form extension arms. The inner wall of the extension arms is provided with fixing teeth.

[0013] A puncture needle, comprising a needle hub and a needle body vertically fixed to the needle hub, wherein the needle hub is provided with a gripping part and the needle body is inserted into a puncture hole;

[0014] When the elastic locking ring forms a fixation on the infusion port puncture seat, the outer diameter of the elastic locking ring is smaller than the inner diameter between the two extension arms;

[0015] When the elastic locking ring is in a free state, the outer diameter of the elastic locking ring is greater than or equal to the inner diameter between the two extension arms.

[0016] Furthermore, the pressing plate is provided with a fixing component for restricting the axial movement freedom of the puncture needle relative to the pressing plate when the lower end of the puncture needle is fully inserted into the perforation.

[0017] This structural design, through a fixing component, restricts the axial movement freedom of the puncture needle after its lower end has fully entered the perforation. This avoids the problem of the hand pulling out the needle involuntarily rebounding due to inertia after the needle has been pulled out forcefully, thus preventing the medical staff from being injured by the needle while fixing the infusion port. At the same time, after the needle is removed, the connection between the pressure plate and the elastic locking ring allows the elastic locking ring, pressure plate, and puncture needle to be discarded together, making it more convenient to use.

[0018] Further specifying, the fixing component includes a connecting rod and a sealing mechanism;

[0019] One end of the connecting rod is rotatably mounted on the needle holder, and the other end is slidably mounted on the connecting arm. When the needle holder moves upward relative to the pressing plate to the maximum position, the free end of the needle body is located in the perforation hole.

[0020] The sealing mechanism is movably mounted on the pressing plate and is connected to the connecting rod for transmission. It is used to seal the lower part of the perforation below the needle body after the lower end of the needle body is disengaged from the port puncture seat and the patient's skin and enters the perforation.

[0021] This structural design uses a connecting rod and a sealing mechanism to form a fixed component. The connecting rod, needle seat, and pressure plate work together to limit the maximum upward movement of the needle seat relative to the pressure plate, thus limiting the axial upward movement of the puncture needle and preventing the needle tip from detaching from the perforation. The sealing mechanism, connected to the connecting rod, allows the lower end of the needle to detach from the port-amen injection seat and the patient's skin before entering the perforation, sealing the lower end of the perforation and limiting the axial downward movement of the puncture needle. This avoids the risk of medical staff being pricked when removing the needle and securing the port-amen injection seat.

[0022] Further specified, the upper end face of the connecting arm is provided with a receiving groove, and the connecting rod passes through the receiving groove;

[0023] The side wall of the connecting arm is provided with a sliding groove, and the lower end of the connecting rod is fixed with a sliding column, which passes through the sliding groove.

[0024] This structural design, through the cooperation of the connecting rod, receiving groove, sliding column and sliding groove, completes the sliding connection between the connecting arm and the connecting rod. The receiving groove with limited length limits the sliding distance of the sliding column, thereby achieving the purpose of limiting the maximum upward movement distance of the needle seat relative to the pressing plate. The structure is simple, easy to use and highly practical.

[0025] Furthermore, the pressing disc also includes a base fixedly mounted on the disc body.

[0026] The perforation penetrates both the disc body and the base body.

[0027] This structural design, through the setting of the base, can increase the overall height of the pressing plate, thereby increasing the length of the perforation. When the needle seat moves upward relative to the pressing plate to the maximum position, the free end of the needle is located inside the perforation, and the sealing mechanism forms a sealing state at the lower end of the perforation, which has a greater fault tolerance rate. In this way, while meeting the usage requirements, the overall accuracy requirements of the indwelling component are reduced, making it highly practical.

[0028] Furthermore, the base body is provided with a transverse groove;

[0029] The blocking mechanism includes a blocking plate, which is laterally slidably installed in a transverse groove;

[0030] The sealing plate is equipped with a stop block;

[0031] The stop block is located on the movement path of the lower end of the connecting rod.

[0032] This structural design uses a sealing plate that is slidably installed in the transverse groove and a stop block located on the movement path of the lower end of the connecting rod to form a sealing mechanism. During the needle removal process, the lower end of the connecting rod pushes the stop block, causing the sealing plate to seal the lower part of the perforation. The structure is simple, easy to manufacture, and highly practical.

[0033] Furthermore, the sealing plate is provided with elastic teeth and clearance grooves for accommodating the elastic teeth;

[0034] The seat body has a locking notch at the top of the transverse groove that matches the elastic locking teeth;

[0035] The elastic locking teeth are inclined downwards along the direction of movement of the sealing plate.

[0036] This structural design, through the matching of elastic teeth and locking notches, completes the fixation between the sealing mechanism and the pressing plate after the sealing plate forms a seal on the lower part of the perforation. This prevents the sealing plate from sliding under external force, which could cause the end of the needle to be exposed again and create a safety hazard for others. At the same time, it also prevents the indwelling component from being reused, making it highly practical.

[0037] Further specified, there are two elastic locking teeth, and the two elastic locking teeth are linearly arranged along the movement direction of the sealing plate;

[0038] Before the connecting rod contacts the stop block, the elastic locking teeth away from the stop block are engaged in the locking notch;

[0039] After the sealing plate blocks the lower part of the perforation, the elastic locking teeth near the stop block are engaged in the locking notch.

[0040] This structural design, through two elastic locking teeth, secures the sealing mechanism and the pressing plate before and after the sealing mechanism seals the perforation. It is simple in structure, easy to use, and highly practical.

[0041] Further defined, the locking mechanism includes a locking arm and a locking seat, the locking arm and the locking seat being respectively disposed at both ends of the elastic locking ring;

[0042] The outer wall of the locking arm is evenly provided with several one-way slots, and the one-way slots are inclined from the inside to the outside towards one end of the elastic locking ring of the locking arm.

[0043] The locking seat has a through groove, the locking arm passes through the through groove, and the locking seat has an elastic locking piece fixed on the outside of the locking arm. The elastic locking piece has a one-way locking tooth that is engaged in a one-way slot.

[0044] This structural design, through the cooperation of the locking arm and the locking seat, and the cooperation of the one-way slot and the one-way tooth, forms a locking component with a one-way locking function. When closing the two ends of the elastic locking ring, there is no need to operate the locking mechanism. After closing, it automatically locks the elastic locking ring, making it more convenient to use.

[0045] Furthermore, both ends of the elastic locking ring are provided with paddle rings.

[0046] This structural design, through the setting of the dial rings, allows two fingers to be inserted into the two dial rings respectively when the two ends of the elastic locking ring are squeezed together, so that the dial rings provide a force point for medical staff, making it more convenient to use.

[0047] The invention employing the above technical solution has the following advantages:

[0048] With its C-shaped elastic locking ring, when inserting a needle into the port-a-cath, the elastic locking ring can be squeezed inward to replace the medical staff's fingers, making contact with the patient's skin. The locking mechanism locks the elastic locking ring, providing continuous fixation to the subcutaneous port-a-cath. The medical staff can then press the auxiliary plate to move the elastic locking ring towards the patient, further securing it. At this point, the medical staff's fingers do not need to exert force towards the puncture needle, thus reducing the risk of needle puncture injury caused by finger slippage during insertion.

[0049] At the same time, pressing the fingers on the subplate during needle insertion can further increase the lateral distance between the fingers and the puncture needle, further reducing the risk of being pricked by the puncture needle during insertion.

[0050] Based on this, by utilizing the cooperation of the fixed slot and the fixed teeth, and matching the elasticity and outer diameter of the elastic locking ring itself, a connection is formed between the pressure plate and the elastic locking ring after the needle insertion is completed, without affecting the insertion of the puncture needle into the port-amen puncture seat. This allows the fingers to be pressed on the auxiliary plate during needle removal, and the connection between the elastic locking ring and the pressure plate restricts the pressure plate, thereby allowing the puncture needle to detach from the port-amen puncture seat, the patient's skin, and the pressure plate. At this time, the distance between the fingers pressing on the auxiliary plate and the puncture needle is relatively large, reducing the risk of medical staff being pricked by the puncture needle during needle removal. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of an embodiment of a puncture-resistant infusion port fixation and indwelling assembly according to the present invention;

[0052] Figure 2 for Figure 1Enlarged structural diagram at point A;

[0053] Figure 3 This is a cross-sectional view of an embodiment of a puncture-resistant infusion port fixation and indwelling device according to the present invention;

[0054] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0055] Figure 5 This is a schematic diagram of the sealing mechanism in an embodiment of a puncture-resistant infusion port fixation and indwelling assembly of the present invention;

[0056] Figure 6 This is a schematic diagram of the structure of the infusion port fixation and indwelling assembly for preventing puncture injuries according to an embodiment of the present invention, before the insertion of the puncture needle;

[0057] Figure 7 This is a cross-sectional view of the elastic locking ring portion in an embodiment of a puncture-resistant infusion port fixation and indwelling component of the present invention.

[0058] Figure 8 for Figure 7 Enlarged structural diagram at point C;

[0059] Figure 9 This is a cross-sectional view of the infusion port fixation and indwelling assembly for preventing puncture wounds according to the present invention before needle removal.

[0060] Figure 10 for Figure 9 Enlarged structural diagram at point D;

[0061] Figure 11 This is a cross-sectional view of the infusion port fixation and indwelling assembly for preventing puncture wounds according to an embodiment of the present invention, after needle removal.

[0062] Figure 12 for Figure 11 Enlarged structural diagram at point E;

[0063] The symbols for the main components are explained below:

[0064] Needle base 1, needle body 10, wing plate 11, hinge base 12

[0065] Pressing plate 2, plate body 20, base 21, perforation 210

[0066] Connecting arm 22, receiving groove 221, sliding groove 222, extension arm 223, fixing tooth 2230,

[0067] Connecting rod 23, hinged column 231, sliding column 232

[0068] 3. Blocking mechanism; 30. Horizontal groove; 31. Blocking plate; 32. Elastic locking teeth; 320. Clearance groove; 33. Stop block.

[0069] 4. Elastic locking ring, 40. Fixed slot, 401. Pulley, 402. Pressure ring, 403. Sub-plate, 404. Clearance hole, 405. Sector groove.

[0070] Locking arm 41, one-way slot 410

[0071] Locking seat 42, elastic locking plate 421, one-way locking tooth 422. Detailed Implementation

[0072] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In addition, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0073] like Figures 1-12 As shown, a puncture-resistant infusion port fixation and indwelling device of the present invention includes:

[0074] The elastic locking ring 4 is C-shaped and has a locking mechanism between its two ends. The outer wall of the elastic locking ring 4 has a fixing groove 40.

[0075] The outer walls on both sides of the elastic locking ring 4 are provided with sub-plates 403;

[0076] Pressing disc 2 includes disc body 20 and two connecting arms 22. A through hole 210 is provided on the disc body 20 axially. The two connecting arms 22 are symmetrically arranged along the central axis of the disc body 20 and are fixedly connected to the disc body 20. The free ends of the two connecting arms 22 extend downward to form extension arms 223. The inner wall of the extension arm 223 is provided with fixing teeth 2230.

[0077] The puncture needle includes a needle seat 1 and a needle body 10 vertically fixed on the needle seat 1. The needle seat 1 is provided with a gripping part, and the needle body 10 passes through the perforation hole 210.

[0078] When the elastic locking ring 4 forms a fixation on the infusion port puncture seat, the outer diameter of the elastic locking ring 4 is smaller than the inner diameter between the two extension arms 223.

[0079] When the elastic locking ring 4 is in a free state, the outer diameter of the elastic locking ring 4 is greater than or equal to the inner diameter between the two extension arms 223.

[0080] When inserting the needle, first place the elastic locking ring 4 on the outer wall of the infusion port puncture seat, and make the lower end face of the elastic locking ring 4 close to the patient's skin. Then, simultaneously squeeze the middle of both sides of the elastic locking ring 4 inward until the inner wall of the elastic locking ring 4 and the outer wall of the infusion port puncture seat form a compression on the patient's skin. Then, the locking mechanism fixes the two ends of the elastic locking ring 4 to form a continuous fixation on the infusion port injection seat located under the patient's skin.

[0081] Then, the medical staff pressed their hands, which were not holding needles, onto the two auxiliary plates 403 to fix the elastic locking ring 4.

[0082] Afterwards, medical staff will hold the puncture needle and insert the needle body 10, which is equipped with the pressure plate 2, into the infusion port puncture seat through the patient's skin.

[0083] After the needle insertion is completed, the locking mechanism is opened. The elastic locking ring 4 expands outward automatically under its own elasticity, releasing the pressure on the infusion port puncture seat under the patient's skin. At the same time, the fixing groove 40 of the elastic locking ring 4 is engaged in the fixing teeth 2230 of the two extension arms 223, forming a connection between the pressing plate 2 and the elastic locking ring 4.

[0084] When removing the needle, the medical staff presses on the two auxiliary plates 403 with one hand to fix the elastic locking ring 4, and uses the connection between the pressing plate 2 and the elastic locking ring 4 to fix the pressing plate 2.

[0085] With the other hand, grasp the holding part again and pull the puncture needle upward until the lower end of the needle body 10 is disengaged from the infusion port puncture seat and the patient's skin.

[0086] The pressing plate 2 is provided with a fixing component for restricting the axial movement freedom of the puncture needle relative to the pressing plate 2 when the lower end of the puncture needle is fully inserted into the perforation 210.

[0087] By using a fixing component, the axial movement freedom of the puncture needle is restricted after the lower end of the puncture needle is fully inserted into the perforation 210. This avoids the problem of the hand pulling out the needle involuntarily rebounding due to inertia after the puncture needle is pulled out forcefully, which could cause the medical staff to be injured by the hand holding the infusion port injection seat. At the same time, after the needle is removed, the elastic locking ring 4 and the pressure plate 2 can be discarded together with the puncture needle by connecting the pressure plate 2 and the elastic locking ring 4, making it more convenient to use.

[0088] The fixing components include a connecting rod 23 and a sealing mechanism 3;

[0089] One end of the connecting rod 23 is rotatably mounted on the needle seat 1, and the other end is slidably mounted on the connecting arm 22. When the needle seat 1 moves upward relative to the pressing plate 2 to the maximum position, the free end of the needle body 10 is located in the through hole 210.

[0090] The sealing mechanism 3 is movably mounted on the pressing plate 2. The sealing mechanism 3 is connected to the connecting rod 23 for transmission. After the lower end of the needle body 10 is separated from the infusion port puncture seat and the patient's skin and enters the perforation 210, the lower part of the perforation 210 is sealed below the needle body 10.

[0091] In practice, depending on the actual situation, a recess can be made on the side wall of the needle body 10, and a locking mechanism can be set on the pressure plate 2 to form a fixing component, thereby restricting the axial movement freedom of the pressure plate 2. In this embodiment, the fixing component is formed by the connecting rod 23 and the sealing mechanism 3. By utilizing the cooperation between the connecting rod 23 and the needle seat 1 and the pressure plate 2, the connecting rod 23 restricts the needle seat 1 to the maximum upward movement relative to the pressure plate 2, that is, restricts the axial upward movement freedom of the puncture needle, thereby preventing the needle tip of the needle body 10 from leaving the perforation 210. Then, the sealing mechanism 3 is connected to the connecting rod 23 by transmission, so that after the lower end of the needle body 10 leaves the infusion port injection seat and the patient's skin and enters the perforation 210, it forms a seal on the lower end of the perforation 210, that is, restricts the axial downward movement freedom of the puncture needle, thereby avoiding the risk of medical staff being pricked when removing the needle body 10 and fixing the infusion port injection seat.

[0092] The gripping part includes two flaps 11 hinged to the needle seat 1.

[0093] In practice, depending on the actual situation, a gripping part can be formed by a structure that can be detachably installed on the needle holder 1 to achieve the gripping function. In this embodiment, the gripping part is formed by two wings 11 hinged to the needle holder 1. When the needle holder 1 is inserted or removed, the wings 11 can be flipped to a vertical position to achieve the gripping function. When using an dressing to fix the needle holder 1 to the patient's skin, the wings 11 can be flipped to rest against the pressure plate 2, reducing the overall height of the indwelling component. The structure is simple, easy to use, and highly practical.

[0094] The upper end face of the connecting arm 22 is provided with a receiving groove 221, and the connecting rod 23 passes through the receiving groove 221;

[0095] The side wall of the connecting arm 22 is provided with a sliding groove 222, and the lower end of the connecting rod 23 is fixedly provided with a sliding column 232, which passes through the sliding groove 222.

[0096] In practice, depending on the actual situation, a sliding connection between the connecting rod 23 and the connecting arm 22 can be achieved by setting a U-shaped arm at the lower end of the connecting rod 23, placing the connecting arm 22 inside the U-shaped arm, and then setting a crossbar at the lower end of the U-shaped arm below the connecting arm 22. In this embodiment, the sliding connection between the connecting arm 22 and the connecting rod 23 is achieved through the cooperation of the connecting rod 23, the receiving groove 221, the sliding column 232 and the sliding groove 222. The receiving groove 221 with a limited length dimension restricts the sliding distance of the sliding column 232, thereby achieving the purpose of limiting the maximum upward movement distance of the needle seat 1 relative to the pressing plate 2. The structure is simple, easy to use and highly practical.

[0097] The sliding groove 222 slopes downwards from the inside out.

[0098] In practice, the sliding groove 222 can also be set to a horizontal state according to the actual situation. In this embodiment, the sliding groove 222 is tilted so that the end of the sliding groove 222 close to the needle body 10 is at the top in terms of horizontal height, which makes the sliding column 232 slide more smoothly in the sliding groove 222 when the needle seat 1 is pulled out, and it is more practical.

[0099] A hinge post 231 is fixedly provided at the upper end of the connecting rod 23;

[0100] A hinge seat 12 is fixedly provided on the needle seat 1, and an opening with a width smaller than the diameter of the hinge post 231 is opened at the top of the hinge seat 12.

[0101] The hinge post 231 is hung inside the hinge seat 12 through an opening.

[0102] In practice, depending on the actual situation, a hinge rod can be fixedly installed on the needle seat 1, and a hook can be installed on the connecting rod 23. The hook is hung on the hinge rod to realize the hinge between the connecting rod 23 and the needle seat 1. In this embodiment, the hinge between the connecting rod 23 and the needle seat 1 is completed by rotating the hinge column 231 and the hinge seat 12. The structure is simple, the assembly is convenient, and the practicality is strong.

[0103] The pressing plate 2 also includes a base 21 fixedly mounted on the plate body 20.

[0104] The perforation 210 penetrates both the disc body 20 and the base body 21.

[0105] By setting the seat 21, the overall height of the pressing plate 2 can be increased, thereby increasing the length of the perforation 210. When the needle seat 1 moves upward relative to the pressing plate 2 to the maximum position, the free end of the needle body 10 is located inside the perforation 210, and the sealing mechanism 3 forms a sealing state on the lower end of the perforation 210, which has a greater fault tolerance rate. In this way, while meeting the usage requirements, the overall accuracy requirements of the indwelling component are reduced, making it highly practical.

[0106] The connecting arm 22 is fixedly connected to the disc body 20 via the base 21.

[0107] A transverse groove 30 is provided on the seat body 21;

[0108] The sealing mechanism 3 includes a sealing plate 31, which is laterally slidably installed in the transverse groove 30;

[0109] The sealing plate 31 is provided with a stop block 33;

[0110] The stop block 33 is located on the movement path of the lower end of the connecting rod 23.

[0111] In practice, depending on the actual situation, a combination of spring, sealing plate 31, and locking element can be selected. The locking element fixes the sealing plate 31, and the movement of the connecting rod 23 unlocks the locking element. The spring then pushes the sealing plate 31 to seal the perforation 210. In this embodiment, the sealing mechanism 3 is formed by the sealing plate 31, which is slidably installed in the transverse groove 30, and the stop block 33 located on the lower end of the connecting rod 23. During the needle removal process, the lower end of the connecting rod 23 pushes the stop block 33, which drives the sealing plate 31 to seal the lower part of the perforation 210. The structure is simple, easy to manufacture, and highly practical.

[0112] The sealing plate 31 is provided with elastic teeth 32 and clearance grooves 320 for accommodating the elastic teeth 32;

[0113] The seat 21 has a locking notch at the top of the transverse groove 30 that matches the elastic locking tooth 32;

[0114] The elastic locking teeth 32 are inclined downward along the direction of movement of the sealing plate 31.

[0115] By matching the elastic teeth 32 with the locking notch, the sealing plate 31 forms a seal on the lower part of the perforation 210, thus completing the fixation between the sealing mechanism 3 and the pressing plate 2. This prevents the sealing plate 31 from sliding under external force, which would cause the end of the needle body 10 to be exposed again, thus posing a safety hazard to others. At the same time, it also prevents the indwelling component from being reused, making it highly practical.

[0116] There are two elastic locking teeth 32, and the two elastic locking teeth 32 are arranged linearly along the movement direction of the sealing plate 31;

[0117] Before the connecting rod 23 contacts the stop block 33, the elastic locking teeth 32 away from the stop block 33 are engaged in the locking notch;

[0118] After the sealing plate 31 blocks the lower part of the through hole 210, the elastic locking tooth 32 near the stop block 33 is engaged in the locking notch.

[0119] In practice, depending on the actual situation, only one elastic locking tooth 32 can be set to fix the sealing mechanism 3 and the pressing plate 2 after the sealing mechanism has sealed the perforation 210. In this embodiment, two elastic locking teeth 32 are used to fix the sealing mechanism 3 and the pressing plate 2 before and after the sealing mechanism has sealed the perforation 210. The structure is simple, easy to use, and highly practical.

[0120] The locking mechanism includes a locking arm 41 and a locking seat 42, which are respectively disposed at both ends of the elastic locking ring 4;

[0121] The outer wall of the locking arm 41 is evenly provided with several one-way slots 410, and one end of the one-way slot 410 is inclined from the inside to the outside of the elastic locking ring 4 of the locking arm 41.

[0122] The locking seat 42 has a through groove, the locking arm 41 passes through the through groove, and the locking seat 42 has an elastic locking piece 421 fixed on the outside of the locking arm 41. The elastic locking piece 421 has a one-way locking tooth 422 that is engaged in the one-way locking groove 410.

[0123] In practice, depending on the actual situation, bolts such as those used to connect the two ends of the elastic locking ring 4 can be selected. The rotation of the bolts can lock the two ends of the elastic locking ring 4. In this embodiment, the locking arm 41 and the locking seat 42 cooperate with each other, and the one-way slot 410 and the one-way tooth 422 cooperate with each other to form a locking component with one-way locking function. When closing the two ends of the elastic locking ring 4, there is no need to operate the locking mechanism. After closing, the elastic locking ring 4 is automatically locked, which is more convenient to use.

[0124] The free end of the elastic locking piece 421 protrudes outward from the locking seat 42.

[0125] In practice, depending on the actual situation, a pull ring can be set at the free end of the elastic locking plate 421 to operate the elastic locking plate 421. In this embodiment, the free end of the elastic locking plate 421 protrudes outward, so that after the puncture needle is inserted, the elastic locking plate 421 can be moved by the free end of the elastic locking plate 421 protruding outward from the locking seat 42, thereby causing the one-way locking tooth 422 to disengage from the one-way locking groove 410, thus completing the unlocking, which is highly practical.

[0126] Both ends of the elastic locking ring 4 are provided with dial rings 401.

[0127] With the setting of the dial ring 401, when the two ends of the elastic locking ring 4 are squeezed together, two fingers can be inserted into the two dial rings 401 respectively, and the dial ring 401 provides a force point for medical staff, making it more convenient to use.

[0128] A pressure ring 402 is provided on the outer wall of the middle part of the elastic locking ring 4.

[0129] By setting the pressure ring 402 and cooperating with the two lever rings 401, when the elastic locking ring 4 is locked and the puncture needle is inserted, the medical staff's non-needle hand can press the two lever rings 401 with the index and middle fingers and press the pressure ring 402 with the thumb to fix the elastic locking ring 4. This further increases the distance between the medical staff's fingers and the needle body 10, thereby further reducing the risk of the medical staff's fingers being pricked by the needle body 10. It is highly practical.

[0130] The sub-plate 403 is provided with a clearance hole 404 for avoiding the locking arm 41.

[0131] In practice, the arc length of the sub-plate 403 can be shortened according to the actual situation to avoid the sub-plate 403 interfering with the movement of the locking arm 41. In this embodiment, the locking arm 41 is avoided by the avoidance hole 404. When the arc length of the sub-plate 403 is large and the hand not holding the needle has a larger pressing range, the sub-plate 403 can avoid interfering with the movement of the locking arm 41, which is highly practical.

[0132] The sub-plate 403 has a fan-shaped groove 405, and the fixing slot 40 is located in the fan-shaped groove 405.

[0133] In practice, depending on the actual situation, the fixing slot 40 can be set outside the setting range of the sub-plate 403. In this embodiment, the fixing slot 40 is accommodated by the setting of the fan-shaped slot 405, and the extension arm 223 is avoided. When the arc length of the sub-plate 403 is large and the hand not holding the needle has a larger pressing range, the fixing slot 40 also has a large arc length, making it more convenient to use.

[0134] In this embodiment, before needle insertion, the elastic locking ring 4 is fitted onto the outer wall of the infusion port puncture seat, and the lower end face of the elastic locking ring 4 is pressed tightly against the patient's skin. Then, two fingers are inserted into the two dials 401 respectively, and the dials 401 provide the medical staff with a force point, causing the two ends of the elastic locking ring 4 to be squeezed together. At the same time, the other hand simultaneously squeezes the middle of the elastic locking ring 4 inward until the inner wall of the elastic locking ring 4 and the outer wall of the infusion port puncture seat form a pressure on the patient's skin.

[0135] During this process, the elastic locking ring 4 undergoes elastic deformation under external force, the locking arm 41 slides in the through groove of the locking seat 42, and pushes the elastic locking piece 421 to deform away from the locking arm 41, thereby causing the one-way locking tooth 422 to disengage from the one-way locking groove 410 until the extrusion ends. At this time, the one-way locking tooth 422 is locked in the new one-way locking groove 410, forming a lock on the elastic locking ring 4.

[0136] Then, the medical staff, without holding the needle, press their index and middle fingers on the two dial rings 401 and their thumb on the pressure ring 402; or press on the two auxiliary plates 403 to fix the elastic locking ring 4.

[0137] Then, medical staff hold the two flaps 11 that have been flipped to the vertical position, align the extension arm 223 with the angle of the fan-shaped groove 405, and insert the needle body 10 through the patient's skin into the port puncture seat.

[0138] After needle insertion, the free end of the elastic locking piece 421 is moved, causing it to deform elastically. This causes the one-way locking tooth 422 to disengage from the one-way locking groove 410. At this time, the elastic locking ring 4 automatically expands outward under its own elasticity, releasing the pressure on the subcutaneous infusion port puncture seat.

[0139] This causes the retaining groove 40 of the elastic locking ring 4 to engage with the retaining teeth 2230 of the two extension arms 223, forming a connection between the pressing plate 2 and the elastic locking ring 4 (e.g., Figure 9 and Figure 10 (as shown)

[0140] Finally, flip the wing 11 so that it rests against the pressure plate 2, and then use the dressing to fix the needle body 10 together with the elastic locking ring 4 that automatically expands outward to the patient's skin.

[0141] When removing the needle, the medical staff presses the two lever rings 401 with the index and middle fingers of one hand and presses the pressure ring 402 with the thumb; or presses the two auxiliary plates 403 to fix the elastic locking ring 4. The connection between the pressure plate 2 and the elastic locking ring 4 is used to fix the pressure plate 2.

[0142] With the other hand, grasp the two flaps 11 that have been flipped to a vertical position again, and then pull the needle seat 1 upward. During this process, the sliding column 232 of the connecting rod 23 slides within the sliding groove 222 of the connecting arm 22 until the lower end of the needle body 10 disengages from the infusion port puncture seat and the patient's skin and enters the perforation 210. At this point, the lower end of the connecting rod 23 contacts the stop block 33 of the sealing mechanism 3 (e.g., Figures 1-4 (as shown)

[0143] Continue pulling the needle holder 1 upwards. The lower end of the connecting rod 23 moves closer to the seat body 21, squeezing the stop block 33 and overcoming the prestress of the elastic locking teeth 32 located in the locking notch. This causes the stop block 33 to move laterally towards the through hole 210 until the needle holder 1 moves upwards relative to the pressing plate 2 to its maximum position, i.e., the sliding column 232 slides to the top of the sliding groove 222. At this time, the elastic locking teeth 32 on the right side are located in the locking notch, and the free end of the needle body 10 is still located in the through hole 210. The sealing plate 31 is driven to the bottom of the needle body 10, forming a seal on the lower part of the through hole 210 (e.g., Figure 11 and Figure 12 (As shown).

[0144] The foregoing has provided a detailed description of a puncture-resistant infusion port fixation and indwelling device provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A puncture-resistant infusion port fixation and indwelling device, characterized in that: include: The elastic locking ring (4) is C-shaped and has a locking mechanism between its two ends. The outer wall of the elastic locking ring (4) has a fixing groove (40). The elastic locking ring (4) has a secondary plate (403) on both outer walls. The pressing plate (2) includes a plate body (20) and two connecting arms (22). The plate body (20) has a through hole (210) axially. The two connecting arms (22) are symmetrically arranged along the central axis of the plate body (20) and fixedly connected to the plate body (20). The free ends of the two connecting arms (22) extend downward to form extension arms (223). The inner wall of the extension arm (223) is provided with fixing teeth (2230) that match the fixing slot (40). The puncture needle includes a needle seat (1) and a needle body (10) vertically fixed on the needle seat (1). The needle seat (1) is provided with a gripping part, and the needle body (10) is inserted into the puncture hole (210). When the elastic locking ring (4) is squeezed inward to fix the port-to-cath puncture seat through the skin, the outer diameter of the elastic locking ring (4) is smaller than the inner diameter between the two extension arms (223). When the elastic locking ring (4) is in a free state, the outer diameter of the elastic locking ring (4) is greater than or equal to the inner diameter between the two extension arms (223); The pressing plate (2) is provided with a fixing component for restricting the axial movement freedom of the puncture needle relative to the pressing plate (2) when the lower end of the puncture needle is fully inserted into the perforation (210); The fixing component includes a connecting rod (23) and a sealing mechanism (3); One end of the connecting rod (23) is rotatably mounted on the needle seat (1) and the other end is slidably mounted on the connecting arm (22). When the needle seat (1) moves upward relative to the pressing plate (2) to the maximum position, the free end of the needle body (10) is located in the through hole (210). The sealing mechanism (3) is movably mounted on the pressing plate (2). The sealing mechanism (3) is connected to the connecting rod (23) for transmission. After the lower end of the needle body (10) is separated from the infusion port puncture seat and the patient's skin and enters the perforation (210), the lower part of the perforation (210) is sealed below the needle body (10).

2. The anti-puncture port fixation and indwelling assembly according to claim 1, characterized in that: The upper end face of the connecting arm (22) is provided with a receiving groove (221), and the connecting rod (23) passes through the receiving groove (221); The side wall of the connecting arm (22) is provided with a sliding groove (222), and the lower end of the connecting rod (23) is fixedly provided with a sliding column (232), which passes through the sliding groove (222).

3. The anti-puncture port fixation and indwelling assembly according to claim 1, characterized in that: The pressing disc (2) also includes a base (21) fixedly mounted on the disc body (20). The perforation (210) penetrates both the disc body (20) and the base body (21).

4. The anti-puncture port fixation and indwelling assembly according to claim 3, characterized in that: A transverse groove (30) is provided on the seat (21); The sealing mechanism (3) includes a sealing plate (31), which is laterally slidably installed in the transverse groove (30); The sealing plate (31) is provided with a stop (33); The stop (33) is located on the movement path of the lower end of the connecting rod (23).

5. The anti-puncture port fixation and indwelling assembly according to claim 4, characterized in that: The sealing plate (31) is provided with elastic teeth (32) and clearance grooves (320) for accommodating the elastic teeth (32). The seat (21) has a locking notch at the top of the transverse groove (30) that matches the elastic locking tooth (32); The elastic locking teeth (32) are inclined downward along the direction of movement of the sealing plate (31).

6. The anti-puncture port fixation and indwelling assembly according to claim 5, characterized in that: There are two elastic locking teeth (32), and the two elastic locking teeth (32) are arranged linearly along the movement direction of the sealing plate (31); Before the connecting rod (23) contacts the stop (33), the elastic locking teeth (32) away from the stop (33) are engaged in the locking notch; When the sealing plate (31) blocks the lower part of the perforation (210), the elastic locking tooth (32) near the stop block (33) is engaged in the locking notch.

7. The anti-puncture port fixation and indwelling assembly according to claim 1, characterized in that: The locking mechanism includes a locking arm (41) and a locking seat (42), which are respectively disposed at both ends of the elastic locking ring (4); The outer wall of the locking arm (41) is evenly provided with a number of one-way slots (410), and the one-way slots (410) are inclined from the inside to the outside towards one end of the elastic locking ring (4) of the locking arm (41). The locking seat (42) has a through groove, the locking arm (41) passes through the through groove, and the locking seat (42) has an elastic locking piece (421) fixed on the outside of the locking arm (41). The elastic locking piece (421) has a one-way locking tooth (422) that is engaged in the one-way slot (410).

8. The anti-puncture port fixation and indwelling assembly according to claim 1, characterized in that: Both ends of the elastic locking ring (4) are provided with dial rings (401).

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