Infusion port with novel structure

Abstract

The invention discloses an infusion port with a novel structure, and relates to the technical field of infusion ports. The device comprises an inner fixing seat which is buried under the skin of a patient so that a protrusion can be formed on the skin of the patient; the outer fixing shell comprises a base plate and a split plate, and a cavity used for containing the protrusions is formed in the base plate. During use, the outer fixing shell is attached to the position, where a patient is embedded, of the inner fixing base through a medical adhesive tape, in the process, a protrusion formed by the inner fixing base is contained through a cavity in the base plate, the position of the inner fixing base is limited, and then a butterfly needle is connected with the split plate through a containing hole; finally, after the base plate and the split plate are connected through the connecting piece, due to the fact that the position between the base plate and the inner fixing base is fixed, and the connecting position between the split plate and the base plate is fixed, after the split plate and the base plate are connected, the needle head of the butterfly needle can be inserted into an infusion hole of the inner fixing base, and the convenience of the device in use is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of infusion ports, and in particular to an infusion port with a novel structure. Background Art

[0002] The infusion port, whose full name is implantable central venous catheter system, also known as a totally implantable intravenous drug delivery device, is a closed venous system that can be completely implanted in the body invented in the late 1970s. It consists of an intravenous catheter with the tip located in the superior vena cava, an injection seat buried subcutaneously for puncture, and a special non-destructive needle.

[0003] Since the existing infusion port is buried under the skin, its fixing seat will form a bulge on the patient's body. However, when infusion is needed, the infusion hole on the fixing seat still needs to be positioned and punctured with a matching butterfly needle. During infusion, the fixing seat also needs to be limited and fixed to reduce the pain caused by the loosening of the fixing seat due to patient movement during infusion. However, in the existing technology, the fixing seat is mostly fixed by medical dressings, and the fixing effect is poor.

[0004] Therefore, the present invention proposes an infusion port with a novel structure to improve this problem. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the above-mentioned background technology, and to provide an infusion port with a new structure.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: An infusion port with a novel structure, comprising: an internal fixation seat, which is buried under the patient's skin to form a bulge on the patient's skin; The external fixing shell includes a base plate and a sub-plate. The base plate is provided with a cavity for accommodating a protrusion. The base plate and the sub-plate are provided with outlets for accommodating an infusion tube. The sub-plate is provided with a receiving hole for accommodating a butterfly needle. The sub-plate is provided with a connector for connecting to the base plate. When the sub-plate is connected to the base plate, the projection of the receiving hole on the patient's skin coincides with the internal fixing seat.

[0007] An inner groove is provided in the accommodating hole, a connecting spring is installed in the inner groove, and a contact plate for contacting with the butterfly needle is installed in the connecting spring.

[0008] The connecting part includes a rotating plate rotatably mounted on the dividing plate, an insertion rod is mounted on the rotating plate, an arc groove is provided on the dividing plate for slidingly cooperating with the insertion rod, a crescent groove is provided on the base plate for accommodating the insertion rod, an insertion plate is mounted in the crescent groove, and a slot is provided on the insertion rod for accommodating the insertion plate.

[0009] A positioning rod is installed on the split plate, and a positioning hole for accommodating the positioning rod is opened on the base plate.

[0010] A receiving plate is installed on the base plate, a distance is provided between the receiving plate and the outlet, and a groove for receiving the infusion tube is provided on the receiving plate.

[0011] An extension plate is mounted on the rotating plate, a vertical plate is mounted on the accommodating plate, and an elastic plate is mounted on the vertical plate. The elastic plate is used to resist the extension plate so that the rotation of the rotating plate is restricted.

[0012] A protruding block is installed on one side of the vertical plate. When the extension plate rotates to contact the protruding block, the extension plate contacts the elastic plate.

[0013] A plurality of rubber rods are installed on the dividing plate, and the rubber rods are used to resist the needle wings of the butterfly needle.

[0014] A rubber sleeve is installed at the end of the resistance plate, and the resistance plate resists the butterfly needle through the rubber sleeve.

[0015] The inner wall of the crescent groove is composed of multiple plane sections. When the insertion rod slides in the crescent groove, the insertion rod contacts the inner wall of the crescent groove.

[0016] The beneficial effects of the present invention are as follows: When the present invention is in use, the external fixing shell is attached to the patient's embedded internal fixing seat by medical tape. During the process, the protrusion formed by the internal fixing seat is accommodated by the cavity on the base plate, and the position of the internal fixing seat is limited. The butterfly needle is then connected to the sub-plate through the accommodating hole. Finally, after the base plate and the sub-plate are connected by the connecting piece, the position between the base plate and the internal fixing seat is fixed, and the connection position between the sub-plate and the base plate is fixed. When the sub-plate and the base plate are connected, the needle head of the butterfly needle can be inserted into the infusion hole of the internal fixing seat, which increases the convenience of the device when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a partial three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the structure of the receiving plate of the present invention; Figure 4 It is a schematic diagram of the structure on the substrate of the present invention; Figure 5 This is another structural schematic diagram of the substrate of the present invention; Figure 6 It is an exploded view of part of the structure of the present invention; Figure 7 This is an exploded view of the rotating plate and the outer fixed shell structure of the present invention; Figure 8 It is a schematic diagram of the sub-plate structure of the present invention; Figure 9 This is a schematic diagram of the structure of the rotating plate of the present invention; Figure 10 This invention Figure 8 Structural three-dimensional cross-sectional view; Figure numerals: 1. Inner fixing seat; 2. Outer fixing shell; 201. Base plate; 202. Dividing plate; 203. Cavity; 204. Outlet; 205. Accommodating hole; 3. Connecting piece; 301. Rotating plate; 302. Inserting rod; 303. Arc groove; 304. Crescent groove; 305. Inserting plate; 306. Slot; 4. Inner groove; 5. Contact plate; 6. Positioning rod; 7. Positioning hole; 8. Accommodating plate; 9. Groove; 10. Vertical plate; 11. Elastic plate; 12. Extension plate; 13. Protruding block; 14. Rubber rod; 15. Rubber sleeve; 16. Connecting spring. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0019] like Figure 1 - Figure 10 As shown, in some embodiments of the present invention, a new type of infusion port is provided, comprising: The internal fixator 1 is buried under the patient's skin to form a bulge on the patient's skin. The internal fixator 1 is the subcutaneous portion of an existing infusion port and is also equipped with a pipeline for delivering liquid medicine. When in use, the internal fixator 1 is located under the patient's skin. Due to its thickness, the internal fixator 1 forms a bulge on the patient's skin. When in use, the existing infusion port also forms a bulge on the patient's skin. The internal fixator 1 is also used in conjunction with a butterfly needle, also called a butterfly wing needle. The external fixation shell 2 includes a base plate 201 and a sub-plate 202. The base plate 201 and the sub-plate 202 are separable. The base plate 201 is adhered to the patient's skin by medical tape. The external fixation shell 2 is located outside the patient's body. The base plate 201 is provided with a cavity 203 for accommodating a protrusion. When the base plate 201 is bonded, the cavity 203 on the base plate 201 is aligned with the protrusion formed on the internal fixator 1. The protrusion is then accommodated by the cavity 203, thereby restricting the position of the internal fixator 1. This reduces the possibility of displacement of the internal fixator 1 during patient movement and secures the relative position of the base plate 201 and the internal fixator 1. The edge of the cavity 203 of the substrate 201 adopts a progressive rounded transition, which reduces the pressure on the subcutaneous protrusion from a local 23kPa to 15kPa (finite element simulation data); it avoids ischemic damage to the skin caused by long-term compression, and is particularly suitable for diabetic patients.

[0020] Micro-guiding grooves are designed on the outer edge of the substrate 201 to guide sweat from the cavity 203 area to the periphery, shortening the skin immersion time and improving the bonding stability of the medical tape; The base plate 201 and the sub-plate 202 are provided with an outlet 204 for accommodating an infusion tube. The base plate 201 and the sub-plate 202 are respectively provided with a semicircular groove. When the sub-plate 202 is connected to the base plate 201, the semicircular groove becomes a full circular groove, forming the outlet 204. The infusion tube of the butterfly needle can be connected to the infusion bottle outside the device through the outlet 204, ensuring the normal use of the device. The sub-plate 202 is provided with a receiving hole 205 for receiving a butterfly needle, and a connecting piece 3 for connecting to the base plate 201 is installed on the sub-plate 202. When the sub-plate 202 is connected to the base plate 201, the projection of the receiving hole 205 on the patient's skin coincides with the internal fixing seat 1. When in use, the head of the butterfly needle is inserted into the receiving hole 205. The position of the butterfly needle is restricted by the inner wall of the receiving hole 205, so that the distance between the butterfly needle and the sub-plate 202 is relatively fixed. When the sub-plate 202 is connected to the base plate 201 through the connecting piece 3, the butterfly needle can be directly aligned with the infusion hole on the internal fixing seat 1 and inserted into the infusion hole, which reduces the difficulty of positioning the infusion hole and increases the convenience of the device when in use. The depth of the receiving hole 205 matches the length of a standard butterfly needle (19mm±0.5mm). After the needle is inserted, the puncture depth is automatically limited to avoid penetrating the infusion port septum. Compared with the prior art, when in use, the external fixation shell 2 is attached to the patient's internal fixation seat 1 by medical tape. During the process, the protrusion formed by the internal fixation seat 1 is accommodated by the cavity 203 on the base plate 201, and the position of the internal fixation seat 1 is limited. Then, the butterfly needle is connected to the sub-plate 202 through the accommodating hole 205. Finally, after the base plate 201 and the sub-plate 202 are connected through the connecting piece 3, since the position between the base plate 201 and the internal fixation seat 1 is fixed, the connection position of the sub-plate 202 and the base plate 201 is fixed. When the sub-plate 202 is connected to the base plate 201, the needle head of the butterfly needle can be inserted into the infusion hole of the internal fixation seat 1, which increases the convenience of the device when in use.

[0021] The base plate 201 and the sub-plate 202 are made of antibacterial modified polypropylene, and 0.5%-1% by mass of silver-loaded zeolite powder is added to the polypropylene.

[0022] like Figure 8 and Figure 10 As shown, part of the structure inside the accommodating hole 205 is disclosed. An inner groove 4 is provided in the accommodating hole 205, and a connecting spring 16 is installed in the inner groove 4. The connecting spring 16 is installed with a contact plate 5 for contacting the butterfly needle. The inner groove 4 is provided on both sides of the inner wall of the accommodating hole 205. The connecting spring 16 forces the contact plate 5 to move toward the outside of the inner groove 4. When the device is in use, the dividing plate 202 and the base plate 201 are in a disassembled state. The butterfly needle is first pressed into the accommodating hole 205, forcing the contact plate 5 to slide into the inner groove 4 to make way for the butterfly needle. When the butterfly needle is fully inserted into the accommodating hole 205, the connecting spring 16 pushes the contact plate 5 to contact the side wall of the butterfly needle, thereby increasing the stability of the butterfly needle and the dividing plate 202 when connected, and increasing the practicality of the device.

[0023] like Figure 5 、 Figure 7 and Figure 9 As shown in the figure, a partial structure of the connecting member 3 is disclosed. The connecting member 3 includes a rotating plate 301 rotatably mounted on the sub-plate 202. The rotating plate 301 is coaxially mounted with the sub-plate 202. A plug-in rod 302 is mounted on the rotating plate 301. The sub-plate 202 is provided with an arc groove 303 that slidably cooperates with the plug-in rod 302. When the rotating plate 301 rotates on the sub-plate 202, the plug-in rod 302 is driven to slide in the arc groove 303, so that the relative position between the plug-in rod 302 and the sub-plate 202 can be changed. After the sub-plate 202 and the base plate 201 are connected, the relative position between the two will not change. Therefore, the rotation of the rotating plate 301 can change the relative position between the plug-in rod 302 and the base plate 201. The base plate 201 is provided with a crescent groove 304 for accommodating the insertion rod 302, a plug board 305 is installed in the crescent groove 304, and the insertion rod 302 is provided with a slot 306 for accommodating the plug board 305. Figure 1 From the main perspective, the inserting plate 305 is installed in the crescent groove 304 along the horizontal direction. When the relative position of the inserting rod 302 and the base plate 201 changes, it slides in the crescent groove 304. When the device is in use, after the branch plate 202 is connected to the butterfly needle, the insertion rod 302 is aligned with the crescent groove 304, and the branch plate 202 is connected to the base plate 201 for preliminary connection. When the branch plate 202 contacts the base plate 201, the insertion rod 302 is located in the crescent groove 304. At this time, the rotating plate 301 is rotated to drive the part of the insertion rod 302 with the slot 306 to move in the crescent groove 304 toward the insertion plate 305. When the insertion plate 305 is inserted into the slot 306, the insertion plate 305 blocks and restricts the inner wall of the slot 306, thereby limiting the tendency of the branch plate 202 and the base plate 201 to move away from each other, thereby increasing the stability of the device when in use.

[0024] The inner wall of the crescent groove 304 is provided with serrated micro-protrusions, the serration height is 0.1mm±0.02mm, and the spacing between adjacent serrations is 0.3mm±0.05mm. When the rotating plate 301 is rotated, an audible "click" sound is generated to replace tactile feedback.

[0025] like Figure 5 and Figure 8 As shown, part of the structure on the split plate 202 is disclosed. A positioning rod 6 is installed on the split plate 202, and a positioning hole 7 for accommodating the positioning rod 6 is opened on the base plate 201. When the split plate 202 needs to be installed with the base plate 201, the semicircular grooves on the two are roughly aligned first. At this time, the positioning rod 6 closest to the positioning hole 7 is aligned and inserted. After the positioning rod 6 is inserted into the positioning hole 7, the insertion rod 302 is inserted into the crescent groove 304, and the inner wall of the positioning hole 7 restricts the positioning rod 6, thereby restricting the relative rotation between the split plate 202 and the base plate 201, so that when the rotating plate 301 rotates, the split plate 202 will not be driven to rotate together due to friction, thereby increasing the feasibility of the device.

[0026] like Figure 3 and Figure 7 As shown, part of the structure on the base plate 201 is disclosed. A accommodating plate 8 is installed on the base plate 201. There is a distance between the accommodating plate 8 and the outlet 204. A groove 9 for accommodating the infusion tube is opened on the accommodating plate 8. The accommodating plate 8 accommodates the infusion tube at the rear end of the butterfly needle through the groove 9. The top of the groove 9 has an opening. When the sub-plate 202 is connected to the base plate 201 from top to bottom, the infusion tube on the butterfly needle is also inserted into the groove 9 from top to bottom through the opening of the groove 9. Since there is a distance between the accommodating plate 8 and the outlet 204, the section of the infusion tube located between the accommodating plate 8 and the outlet 204 will not fold, thereby reducing the possibility of infusion problems caused by folding of the infusion tube when the device is in use, thereby increasing the practicality of the device.

[0027] like Figure 3 and 7When the cam 310 is in the closed position, the cam 310 is in the closed position, and the cam 310 is in the closed position, so that the cam 310 is in the closed position.

[0028] like Figure 3 and Figure 7 As shown, the specific structure of the vertical plate 10 is disclosed. A protruding block 13 is installed on one side of the vertical plate 10. When the extension plate 12 rotates to contact the protruding block 13, the extension plate 12 conflicts with the elastic plate 11, and the two sides of the vertical plate 10 are set as the proximal side and the distal side. When the rotating plate 301 does not rotate, the distance from the proximal side to the extension plate 12 is smaller than the distance from the distal side to the extension plate 12. The protruding block 13 is installed at the distal side. When the rotating plate 301 rotates, it drives the extension plate 12 to gradually approach the vertical plate 10. When the extension plate 12 passes the proximal side and moves to the distal side, it contacts the protruding block 13, thereby restricting the rotation trend of the extension plate 12, so that the extension plate 12 can be stably located between the elastic plates 11, which is convenient for positioning the extension plate 12 and increases the practicality of the device.

[0029] like Figure 8 As shown, a plurality of rubber rods 14 are mounted on the dividing plate 202. The rubber rods 14 are used to resist the needle wings of the butterfly needle. The rubber rods 14 are located around the receiving hole 205. Figure 8 As shown, when the butterfly needle is installed in the accommodating hole 205, the needle wing of the butterfly needle contacts the rubber rod 14 and forces the rubber rod 14 to deform, thereby causing the rubber rod 14 to contact the needle wing of the butterfly needle, thereby increasing the fixing strength of the butterfly needle by the dividing plate 202 and increasing the stability of the butterfly needle when connected to the dividing plate 202.

[0030] The rubber rod 14 is radially inclined (with an inclination angle of 8°-10°). When the butterfly needle is inserted, it is automatically adjusted to a vertical state (angle deviation < 2°) by the lateral squeezing force, thereby reducing micro-damage to the tissue around the needle hole and the incidence of exudation. like Figure 8As shown, a rubber sleeve 15 is installed at the end of the contact plate 5, and the contact plate 5 contacts the butterfly needle through the rubber sleeve 15. The contact plate 5 contacts the butterfly needle through the rubber sleeve 15. Firstly, the flexible contact reduces the wear on the butterfly needle when it is fixed, thereby increasing the safety of the device. Secondly, the rubber sleeve 15 increases the friction between the contact plate 5 and the butterfly needle, thereby increasing the connection strength between the contact plate 5 and the butterfly needle, and reducing the possibility of the butterfly needle falling.

[0031] like Figure 5 As shown, the inner wall of the crescent groove 304 is composed of multiple planes. When the insertion rod 302 slides in the crescent groove 304, the insertion rod 302 conflicts with the inner wall of the crescent groove 304. Since the inner wall of the crescent groove 304 is a plane, when the insertion rod 302 slides in the crescent groove 304, its rod body will continuously conflict with the inside of the crescent groove 304, with a more obvious sense of fluctuation. When the rotating plate 301 rotates, it can give medical staff more obvious tactile feedback to judge whether the rotating plate 301 is in place, thereby increasing the practicality of the device.

[0032] Finally, during the design phase, we considered the use case and first aid needs. We also designed the following features: The rotating plate 301 integrates a microneedle array (300μm high, 50μm diameter) that releases epinephrine when pressed in an emergency (other drugs can be substituted, depending on the needs). Specifically, polylactic-co-glycolic acid (PLGA) serves as the microneedle matrix material, and its properties include: Biodegradability: Hydrolyzed into lactic acid and glycolic acid in the body, completely metabolized in 6-8 weeks (ASTM F1635 standard); Drug loading compatibility: can load hydrophilic drugs (such as epinephrine) with a drug loading rate of up to 30% (w / w); Mechanical strength: Young's modulus 2-4GPa, sufficient to penetrate the skin (epidermis thickness 50-150μm).

[0033] The microneedle structural parameters are as follows: Array layout: 10 × 10 needle array, needle pitch 500 μm, coverage area 5 mm × 5 mm; Needle shape: hollow conical needle (tip angle 15°), wall thickness 10μm, inner lumen diameter 30μm; Surface modification: The needle tip is coated with magnesium stearate to reduce puncture resistance.

[0034] Manufacturing process: Microinjection molding: PLGA was injected at 80°C using a silicon mold (made by photolithography + soft etching technology); Drug loading: Epinephrine (1 mg / mL) was mixed with trehalose (lyoprotectant), freeze-dried under vacuum, and then filled into the needle cavity; Sealing treatment: The needle port is sealed with a thermosensitive hydrogel (LCST 32°C), and body temperature triggers the dissolution of the drug.

[0035] Mechanical trigger design: Spring energy storage mechanism: A stainless steel compression spring (wire diameter 0.3mm, stiffness 1.2N / mm) is integrated inside the rotating plate 301; Pressing stroke: 2mm pressing depth triggers the spring to release, pushing the microneedle array into the skin at a speed of 0.5m / s; Force feedback design: The trigger threshold is set to 4N±0.5N to avoid misoperation.

[0036] Specific deployment location: Internal cavity of the rotating plate: A 1.2mm×5mm×5mm cavity is opened within the 3mm thickness of the rotating plate 301 to accommodate the microneedle module; Guide track: A polytetrafluoroethylene (PTFE) guide track is set to ensure vertical insertion of the microneedle (angle deviation <2°).

[0037] Insertion rod 302 avoidance: the microneedle module is arranged in an offset manner to avoid the movement path of the insertion rod; Sealing guarantee: The surface of the rotating plate is covered with a medical-grade silicone film (thickness 0.1mm), with a waterproof grade of IP68.

[0038] While the disclosed technology increases manufacturing costs, it is well-suited for high-precision medical environments (such as tertiary hospital operating rooms and oncology centers, where precision is paramount). The multi-stage locking design of the rotating plate and crescent groove can withstand 8-10N of lateral tension (measured data), making it suitable for postoperative patients who frequently turn or are restless (such as in the ICU). Furthermore, for chemotherapy patients requiring continuous infusions for more than three months, the insertion rod, made of a specific material, can undergo numerous insertion and removal cycles, preventing the effects of chemotherapy drugs. (Common chemotherapy drugs are classified into three categories based on the degree of local tissue damage caused by extravasation: 1. Corrosive drugs can cause tissue blistering or even necrosis after extravasation; 2. Irritants can cause pain at the injection site or intravenous route, potentially leading to local inflammation, phlebitis, and allergic reactions; 3. Non-irritants do not cause ulceration or necrosis). It is also effective for specific patient populations, such as obese patients with a BMI > 30 or elderly patients with subcutaneous tissue atrophy. The baseplate cavity depth can be customized (with a precision of 0.5mm) to match specific protrusion morphologies. In addition, the positioning rod and the rubber rod form a three-dimensional fixed network to prevent displacement caused by sliding of the fat layer.

[0039] In addition, for drugs that are prone to extravasation, such as chemotherapy drugs (paclitaxel) and hypertonic solutions (TPN), the double-locking design of the elastic plate and the extension plate can reduce the risk of drug extravasation.

[0040] Furthermore, if we use a medical environment with lower precision, we can improve the original solution to further reduce the technical cost. The technical combination of rotating plate + insertion rod + crescent groove can be directly replaced with a magnetic adsorption structure: the base plate and the sub-plate are preset with magnets, which are automatically aligned and locked by magnetic attraction (medical-grade (antibacterial silicone coating material, hook surface and fleece surface)) Velcro can also be used here, which are fixed on the contact surface of the base plate and the sub-plate respectively. This can also significantly reduce costs and avoid the problem of traditional nylon hook and fleece surface that is prone to breeding bacteria; it is also possible to change to a snap-on solution (guide snap-on (the base plate is provided with a protrusion and the sub-plate is provided with an adaptation groove) to achieve self-alignment during insertion). The solution in brackets is better. Magnetic attraction is the solution that is closer to the original solution and is given priority).

[0041] Furthermore, the positioning rod + positioning hole combination can actually eliminate the positioning rod and adopt a guiding bevel design: the edge of the split board is set with a bevel, and it automatically slides into the correct position after contacting the base board; Finally, the combination of elastic plate + extension plate can eliminate the elastic plate and adopt a snap-on limiter: after the rotating plate is rotated into place, it is snap-locked with the base plate and confirmed by sound feedback; the above solutions are all regarded as technical solutions of the present invention.

[0042] Below we present practical examples to help you understand the advantages of the present invention compared to the prior art, and thus understand the technical features of the present invention: Comparative Example 1: Chemotherapy patients need long-term infusion and need to receive paclitaxel chemotherapy through an infusion port for 6 consecutive months. The existing technology uses a patch application method, which requires replacing the transparent dressing, fixing tape and puncture needle assembly 2-3 times a week due to skin oil secretion. During the replacement process, the needle shifts and causes drug extravasation. However, using our solution, the base plate cavity precisely fits the subcutaneous protrusion, combined with the crescent alveolar locking structure, even if the patient frequently turns over at night, the external fixation shell remains firm, and the rubber rod tilts to squeeze the needle wing, so that the needle is always inserted vertically, and the above-mentioned drug extravasation will not occur during the chemotherapy cycle; and the use of antibacterial polypropylene material in the present invention can also avoid frequent replacement. During the treatment cycle, only one maintenance is required per month, which is a significant technical improvement compared to the previous frequent replacement of transparent dressings, fixing tape and puncture needle assemblies per week.

[0043] Comparative Example 2: During long-term infusion, some obese diabetic patients have a thick abdominal fat layer, and the existing infusion method has a high probability of puncture failure. However, using our solution, as long as the cavity depth is increased to match the height of the bulge after fat compression, a successful puncture can be guaranteed.

[0044] Comparative Example 3: Children often twist and turn due to pain during infusion (much more frequently than adults). The existing infusion solution may cause the needle to come out due to frequent twisting. Our solution will make it easier to fix and prevent the needle from coming out.

[0045] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A new type of infusion port, characterized in that: include: An internal fixation seat (1) is buried under the patient's skin to form a bulge on the patient's skin; The external fixing shell (2) comprises a base plate (201) and a sub-plate (202), wherein the base plate (201) is provided with a cavity (203) for accommodating a protrusion, the base plate (201) and the sub-plate (202) are provided with an outlet (204) for accommodating an infusion tube, the sub-plate (202) is provided with an accommodating hole (205) for accommodating a butterfly needle, and the sub-plate (202) is provided with a connector (3) for connecting to the base plate (201), and when the sub-plate (202) is connected to the base plate (201), the projection of the accommodating hole (205) on the patient's skin coincides with the internal fixing seat (1).

2. The infusion port with a novel structure according to claim 1, characterized in that: An inner groove (4) is provided in the accommodating hole (205), a connecting spring (16) is installed in the inner groove (4), and a contact plate (5) for contacting the butterfly needle is installed in the connecting spring (16).

3. The infusion port with a novel structure according to claim 2, characterized in that: The connecting member (3) comprises a rotating plate (301) rotatably mounted on a split plate (202); an inserting rod (302) is mounted on the rotating plate (301); an arcuate groove (303) is provided on the split plate (202) for slidingly cooperating with the inserting rod (302); a crescent groove (304) is provided on the base plate (201) for accommodating the inserting rod (302); an inserting plate (305) is mounted in the crescent groove (304); and a slot (306) is provided on the inserting rod (302) for accommodating the inserting plate (305).

4. The infusion port with a novel structure according to claim 3, characterized in that: A positioning rod (6) is installed on the split plate (202), and a positioning hole (7) for accommodating the positioning rod (6) is provided on the base plate (201).

5. The infusion port with a novel structure according to claim 4, characterized in that: A receiving plate (8) is mounted on the base plate (201), with a distance between the receiving plate (8) and the outlet (204), and a groove (9) for receiving an infusion tube is provided on the receiving plate (8).

6. The infusion port with a novel structure according to claim 5, characterized in that: An extension plate (12) is mounted on the rotating plate (301), a vertical plate (10) is mounted on the accommodating plate (8), and an elastic plate (11) is mounted on the vertical plate (10). The elastic plate (11) is used to resist the extension plate (12) so that the rotation of the rotating plate (301) is restricted.

7. The infusion port with a novel structure according to claim 6, characterized in that: A protruding block (13) is installed on one side of the vertical plate (10), and when the extension plate (12) rotates to contact the protruding block (13), the extension plate (12) contacts the elastic plate (11).

8. The infusion port with a novel structure according to claim 7, characterized in that: A plurality of rubber rods (14) are mounted on the dividing plate (202), and the rubber rods (14) are used to resist the needle wings of the butterfly needle.

9. The infusion port with a novel structure according to claim 8, characterized in that: A rubber sleeve (15) is installed at the end of the resistance plate (5), and the resistance plate (5) resists the butterfly needle through the rubber sleeve (15).

10. The infusion port with a novel structure according to claim 9, characterized in that: The inner wall of the crescent groove (304) is composed of multiple plane sections. When the insertion rod (302) slides in the crescent groove (304), the insertion rod (302) contacts the inner wall of the crescent groove (304).

Images