Infusion port with high safety

Abstract

The invention discloses a high-safety infusion port, and relates to the technical field of infusion ports. The device comprises a port base which is provided with a liquid inlet cavity, and a guide pipe communicating with the liquid inlet cavity is installed on the port base; the interlayer is arranged on the wall thickness of the guide pipe, the guide pipe is divided into an inner pipe and an outer pipe through the interlayer, and a spiral framework is installed on the inner wall of the outer pipe. When the catheter is used, the catheter is placed into the vein of a patient, the basic shape of the catheter is limited through the spiral framework, the limiting rings are arranged in the interlayer, and when the catheter is bent, the whole catheter cannot be bent at an overlarge bending angle or cannot be bent through collision between the limiting rings; therefore, the device can be used for normal infusion, the possibility of venous thrombosis of a patient is reduced, and the safety of the device is improved.

Description

Technical Field

[0001] The present application relates to the technical field of infusion ports, and in particular to an infusion port with high safety. Background Art

[0002] The infusion port is a closed infusion device that is completely implanted in the human body. It includes a catheter with the tip located in the superior vena cava and an injection seat implanted under the skin. It is suitable for patients who need long-term infusion, such as chemotherapy patients, and reduces the possibility of phlebitis caused by repeated punctures. The tube of the existing infusion port is inserted into the patient's vein through surgery, but most veins are curved, so the catheter is also in a curved state when located in the vein. During subsequent use, the patient's own activities can easily cause the catheter to bend too much or bend in the blood vessel, making infusion difficult or impossible, which can easily lead to failure of the infusion port and cause venous thrombosis in the patient. Therefore, the present application proposes an infusion port with high safety. Summary of the invention

[0003] The purpose of the present application is to solve the problems in the above-mentioned background technology and provide an infusion port with high safety.

[0004] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions: A highly safe infusion port, comprising: A port seat, on which a liquid inlet cavity is formed, and a conduit connected to the liquid inlet cavity is installed on the port seat; The interlayer is opened on the wall thickness of the catheter, and the interlayer divides the catheter into an inner tube and an outer tube. A spiral skeleton is installed on the inner wall of the outer tube, and the length of the spiral skeleton is consistent with the length of the interlayer. A plurality of limiting rings are installed on the tube wall of the inner tube located in the interlayer, and the limiting rings are arrayed on the inner tube along the axial direction of the inner tube.

[0005] Furthermore, a spiral groove is provided on the outer tube, and the spiral skeleton is installed in the spiral groove.

[0006] Furthermore, an inclined plate is installed in the liquid inlet chamber, and the inclined plates are symmetrically installed on both sides of the inner wall of the liquid inlet chamber. The distance between the inclined plates gradually decreases from the end close to the conduit to the end far away from the conduit, so that a liquid inlet is formed between the inclined plates. A blocking plate is slidably installed in the liquid inlet chamber, and the blocking plate is located on the side of the inclined plate far away from the liquid inlet. A through plate is installed on the blocking plate, and the projection of the blocking plate on the inclined plate blocks the liquid inlet. The projection of the through plate on the inclined plate is smaller than the diameter of the liquid inlet.

[0007] Furthermore, an expansion panel is installed at one end of the blocking plate away from the liquid inlet, and the area of ​​the longitudinal section of the expansion panel toward the conduit is larger than the area of ​​the longitudinal section of the blocking plate in the same direction.

[0008] Furthermore, a thickening block is installed at the connection between the port seat and the catheter, and the diameter of the thickening block is larger than the outer diameter of the catheter.

[0009] Furthermore, the inner wall of the conduit is provided with a plurality of extending grooves along its axial direction.

[0010] Furthermore, a pipeline cavity is provided in the liquid inlet cavity, the pipeline cavity is used to connect with the catheter, the inner diameter of the pipeline cavity is consistent with the inner diameter of the catheter, a deceleration ball is rotatably installed in the pipeline cavity, and the diameter of the deceleration ball is smaller than the diameter of the inner wall of the pipeline cavity.

[0011] Furthermore, the free end of the conduit is provided with a rounded corner.

[0012] The catheter adopts a three-level anti-bending design of sandwich, spiral skeleton, and restriction ring. The spiral skeleton made of medical plastic is embedded in the spiral groove of the outer tube to provide elastic support and prevent the catheter from collapsing. Sandwich restriction ring: Multiple annular restriction rings are set on the outer wall of the inner tube, with a spacing of 1-2mm. The restriction rings conflict with each other during bending, limiting the bending angle to ≤45°; Inner pipe extension groove: longitudinal extension grooves are set on the inner wall to reduce liquid residue and assist in flushing and cleaning; The catheter is composed of three composite layers: an outer tube containing a spiral skeleton, an interlayer containing a restriction ring array, and an inner tube containing an extended surface groove.

[0013] An inclined plate, a blocking plate and an expansion plate are arranged in the liquid inlet cavity to link the valve, and the symmetrical inclined plates form a gradually shrinking liquid inlet; the blocking plate slides, and the medicine pushes the through plate to open, and the expansion plate is closed under pressure when blood flows back. The blocking plate is made of silicone material, and the area of ​​the expansion plate is 1.5 times that of the blocking plate, which enhances the blood driving force.

[0014] The beneficial effects of this application are as follows: When the present application is in use, the catheter is inserted into the patient's vein. When in use, the basic shape of the catheter is restricted by the spiral skeleton, and a restriction ring is provided in the interlayer. When the catheter is bent, the interference between the restriction rings prevents the bending angle of the entire catheter from being too large or forming a bend, so that the device can perform infusion normally, reduces the possibility of venous thrombosis in the patient, and increases the safety of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of this application; Figure 2 It is an exploded view of some structures of this application; Figure 3 This is a schematic diagram of the structure between the inclined plate and the blocking plate of the present application; Figure 4 This application Figure 1 The three-dimensional cross-sectional view of the middle structure; Figure 5It is a three-dimensional cross-sectional view of the port seat structure of the present application; Figure 6 It is a three-dimensional cross-sectional view of the catheter structure of the present application; Figure numerals: 1. port seat; 101. liquid inlet cavity; 102. catheter; 1021. inner tube; 1022. outer tube; 2. interlayer; 201. spiral skeleton; 202. limiting ring; 3. spiral groove; 4. inclined plate; 5. liquid inlet; 6. blocking plate; 7. through plate; 8. expansion panel; 9. thickening block; 10. extension groove; 11. pipeline cavity; 12. deceleration ball. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Embodiment 1

[0017] like Figure 1-Figure 6 As shown, a highly safe infusion port proposed in Example 1 of the present application includes: The port seat 1 is provided with a liquid inlet cavity 101, and a catheter 102 connected to the liquid inlet cavity 101 is installed on the port seat 1. When in use, the port seat 1 and the catheter 102 are surgically inserted into the patient's body. A rubber skin made of medical rubber is provided on the upper surface of the port seat 1. The infusion is performed by puncturing a needle for infusion through the rubber skin into the liquid inlet cavity 101, so that the function of the device is consistent with that of an existing infusion port for delivering liquid medicine. The interlayer 2 is provided on the wall thickness of the catheter 102. The interlayer 2 divides the catheter 102 into an inner tube 1021 and an outer tube 1022. The outer tube 1022 is located on the inner wall of the interlayer 2 and is provided with a spiral skeleton 201. The length of the spiral skeleton 201 is consistent with the length of the interlayer 2. The spiral skeleton 201 is made of medical plastic and has a certain elasticity. When in use, the spiral skeleton 201 is provided in the interlayer 2. The elasticity of the spiral skeleton 201 itself enables the catheter 102 to be reset when the catheter 102 is bent with the movement of the patient, and the spiral skeleton 201 resets itself, thereby reducing the possibility of the catheter 102 being bent. A plurality of limiting rings 202 are installed on the tube wall of the inner tube 1021 located in the interlayer 2. The limiting rings 202 are arrayed on the inner tube 1021 along the axial direction of the inner tube 1021. The diameters of the limiting rings 202 are spaced relatively close. The spacing between the limiting rings 202 allows the catheter 102 to bend. However, when the catheter 102 bends too much, the limiting rings 202 move closer to each other as they bend, so that the close parts of the limiting rings 202 collide with each other, limiting the bending of the catheter 102. This further reduces the possibility of the catheter 102 being bent or bent too much during use, thereby increasing the practicality of the device. Compared with the prior art, when in use, the catheter 102 is placed in the patient's vein. When in use, the basic shape of the catheter 102 is limited by the spiral skeleton 201, and a limiting ring 202 is provided in the interlayer 2. When the catheter 102 bends, the interference between the limiting rings 202 prevents the bending of the entire catheter 102 from being too large or forming a bend, so that the device can perform infusion normally, reduce the possibility of venous thrombosis in the patient, and increase the safety of the device. Embodiment 2

[0018] like Figure 6 As shown, the second embodiment is based on the first embodiment and further discloses the outer tube 1022, the liquid inlet cavity 101 and the port seat 1. In the second embodiment, a spiral groove 3 is opened on the outer tube 1022, and the spiral skeleton 201 is installed in the spiral groove 3. The outer tube 1022 is connected to the spiral skeleton 201 through the spiral groove 3. When in use, the contact area between the outer tube 1022 and the spiral skeleton 201 is increased by the spiral groove 3, so that when the spiral skeleton 201 is deformed, it can more stably drive the catheter 102 to reset, thereby increasing the practicality of the device.

[0019] like Figure 3 and Figure 5 As shown, in the second embodiment, an inclined plate 4 is installed in the liquid inlet cavity 101, and the inclined plates 4 are symmetrically installed on both sides of the inner wall of the liquid inlet cavity 101. The distance between the inclined plates 4 gradually decreases from the end close to the catheter 102 to the end away from the catheter 102, so that a liquid inlet 5 is formed between the inclined plates 4. The distance between the ends of the inclined plates 4 facing the catheter 102 is greater than the distance between the other ends, so that the diameter of the liquid inlet 5 is small, and the diameter of the liquid inlet cavity 101 located on the side of the inclined plate 4 close to the liquid inlet 5 is consistent with the diameter of the rubber skin on the port seat 1. For the sake of convenience, it is not clearly shown in the drawings of the specification. Through the above arrangement, when the needle for infusion is inserted into the rubber skin, the input liquid is always located at the end of the inclined plate 4 facing the liquid inlet 5; A blocking plate 6 is slidably installed in the liquid inlet cavity 101. The blocking plate 6 is located on the side of the inclined plate 4 away from the liquid inlet 5. A through plate 7 is installed on the blocking plate 6. The projection of the blocking plate 6 on the inclined plate 4 blocks the liquid inlet 5. The projection of the through plate 7 on the inclined plate 4 is smaller than the diameter of the liquid inlet 5. The sliding path of the blocking plate 6 is close to or away from the liquid inlet 5. When the blocking plate 6 is inserted into the liquid inlet 5, the liquid inlet 5 is blocked by the blocking plate 6. When the through plate 7 is located in the liquid inlet 5, there is a gap between the through plate 7 and the liquid inlet 5 for the liquid to pass through. A plate body is installed in the liquid inlet cavity 101, and the plate body is installed on the side of the blocking plate 6 close to the catheter 102, so that when the liquid medicine pushes the blocking plate 6, the plate body limits the maximum sliding limit of the blocking plate 6, so that the blocking block 6 will not move to a position too far away from the liquid inlet 5; During use, when the infusion needle is infusing into the liquid inlet cavity 101, the medicine pushes the pass plate 7 to be inserted into the liquid inlet 5. At this time, a gap appears between the liquid inlet 5 and the pass plate 7, so that the medicine can be normally input. During the infusion, since the device is mostly suitable for chemotherapy patients, chemotherapy drugs need to be slowly input, and it often takes half a day to hang them up. If the patient needs to go to the toilet or other activities, it is easy to cause venous reflux. At this time, the blood flow pushes the blocking plate 6, so that the blocking plate 6 is pushed into the liquid inlet 5, and then the liquid inlet 5 is blocked, reducing the possibility of blood reflux into the infusion needle, thereby reducing the possibility of patient panic and increasing the practicality and safety of the device.

[0020] like Figure 5 As shown, in embodiment 2, an expansion panel 8 is installed at one end of the blocking plate 6 away from the liquid inlet 5, and the area of ​​the longitudinal section of the expansion panel 8 toward the catheter 102 is larger than the area of ​​the longitudinal section of the blocking plate 6 in the same direction. The expansion panel 8 is used to increase the area of ​​the blocking plate 6 toward the catheter 102, so that when blood refluxes, the contact area between the blood and the blocking plate 6 is increased, and the blocking plate 6 is better pushed, so that the blocking plate 6 can be better inserted into the liquid inlet 5, thereby increasing the practicability of the device.

[0021] like Figure 1 and Figure 5 As shown, in Example 2, a thickening block 9 is installed at the connection between the port seat 1 and the catheter 102. The diameter of the thickening block 9 is larger than the outer diameter of the catheter 102. When in use, the thickness of the connection between the catheter 102 and the port seat 1 is increased by the thickening block 9, so that when the catheter 102 moves, the side wall of the catheter 102 is blocked along the edge by the thickening block 9, so that the connection between the catheter 102 and the port seat 1 will not bend, which further increases the patency of the catheter 102 and the safety of the device. Embodiment 3

[0022] like Figure 1-6 As shown, the third embodiment further discloses the present application on the basis of the second embodiment. In the third embodiment, a plurality of surface extension grooves 10 are provided on the inner wall of the catheter 102 along its axial direction. The surface extension grooves 10 increase the inner diameter of the catheter 102, thereby reducing the possibility of the inner wall of the catheter 102 being blocked. The surface extension grooves 10 are provided along the axial direction of the catheter 102, and the corners thereof have openings in the outlet direction of the catheter 102. When in use, the residual liquid medicine at the corners of the surface extension grooves 10 can be flushed out by subsequent flushing of the catheter with saline, thereby reducing the possibility of residual liquid medicine in the catheter 102.

[0023] As shown in Figure X, in some embodiments, a pipeline cavity 11 is opened in the liquid inlet cavity 101, and the pipeline cavity 11 is used to connect with the catheter 102. The inner diameter of the pipeline cavity 11 is consistent with the inner diameter of the catheter 102. A deceleration ball 12 is rotatably installed in the pipeline cavity 11, and the diameter of the deceleration ball 12 is smaller than the diameter of the inner wall of the pipeline cavity 11. When in use, when the medicine moves from the liquid inlet cavity 101 to the catheter 102, it passes through the pipeline cavity 11, and the deceleration ball 12 blocks the medicine, so that it is flushed by the medicine and rotates, so that the medicine can pass through the gap between the deceleration ball 12 and the pipeline cavity 11. At the same time, the kinetic energy of the medicine is converted into the mechanical energy of the deceleration ball 12, so that the flow rate of the overall medicine is slowed down, reducing the possibility of irritation of the patient's blood vessels due to excessive speed of the medicine, and further increasing the safety of the device.

[0024] As shown in FIG. X, in some embodiments, the free end of the catheter 102 is provided with a rounded corner. During the insertion process of the catheter 102, the rounded corner of the free end reduces the possibility of the catheter 102 irritating the inner wall of the blood vessel, thereby increasing the safety of the device. Embodiment 4

[0025] Combination Figure 1 , Figure 5 As shown, if there is an expansion of special scenarios, this embodiment aims at the long-term retention needs of immunocompromised patients, and constructs a gradient antibacterial layer on the outer surface of the port seat 1: microneedle sustained-release structure: the outer layer of the port seat 1 is provided with a 100-200μm PLGA microneedle array, and the needle body is loaded with 0.5mg / cm² of minocycline hydrochloride, which reduces the incidence of catheter-related bloodstream infection (CRBSI) under body fluid penetration; The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those 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 application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A highly safe infusion port, characterized in that: include: A port seat (1) having a liquid inlet cavity (101) formed thereon, wherein a conduit (102) communicating with the liquid inlet cavity (101) is installed on the port seat (1); The interlayer (2) is provided on the wall thickness of the catheter (102), and the interlayer (2) divides the catheter (102) into an inner tube (1021) and an outer tube (1022). A spiral skeleton (201) is installed on the inner wall of the outer tube (1022), and the length of the spiral skeleton (201) is consistent with the length of the interlayer (2). A plurality of limiting rings (202) are installed on the tube wall of the inner tube (1021) located inside the interlayer (2), and the limiting rings (202) are arranged on the inner tube (1021) in an array along the axial direction of the inner tube (1021).

2. The highly safe infusion port according to claim 1, characterized in that: The outer tube (1022) is provided with a spiral groove (3), and the spiral skeleton (201) is installed in the spiral groove (3).

3. The highly safe infusion port according to claim 2, characterized in that: An inclined plate (4) is installed in the liquid inlet chamber (101). The inclined plates (4) are symmetrically installed on both sides of the inner wall of the liquid inlet chamber (101). The distance between the inclined plates (4) gradually decreases from the end close to the conduit (102) to the end away from the conduit (102), so that a liquid inlet (5) is formed between the inclined plates (4). A blocking plate (6) is slidably installed in the liquid inlet chamber (101). The blocking plate (6) is located on a side of the inclined plate (4) away from the liquid inlet (5). A through plate (7) is installed on the blocking plate (6). The projection of the blocking plate (6) on the inclined plate (4) blocks the liquid inlet (5). The projection of the through plate (7) on the inclined plate (4) is smaller than the diameter of the liquid inlet (5).

4. The highly safe infusion port according to claim 3, characterized in that: An expansion panel (8) is installed at one end of the blocking plate (6) away from the liquid inlet (5), and the area of ​​the longitudinal section of the expansion panel (8) in the direction of the conduit (102) is larger than the area of ​​the longitudinal section of the blocking plate (6) in the same direction.

5. The highly safe infusion port according to claim 4, characterized in that: A thickening block (9) is installed at the connection between the port seat (1) and the catheter (102), and the diameter of the thickening block (9) is greater than the outer diameter of the catheter (102).

6. The highly safe infusion port according to claim 5, characterized in that: The inner wall of the conduit (102) is provided with a plurality of surface extension grooves (10) along its axial direction.

7. The highly safe infusion port according to claim 6, characterized in that: A pipeline cavity (11) is provided in the liquid inlet cavity (101), the pipeline cavity (11) is used to be connected to the catheter (102), the inner diameter of the pipeline cavity (11) is consistent with the inner diameter of the catheter (102), a deceleration ball (12) is rotatably installed in the pipeline cavity (11), and the diameter of the deceleration ball (12) is smaller than the diameter of the inner wall of the pipeline cavity (11).

8. The highly safe infusion port according to claim 7, characterized in that: The free end of the conduit (102) is provided with a rounded corner.

9. The highly safe infusion port according to claim 1, characterized in that: The catheter (102) adopts a three-level anti-bending design of interlayer, spiral skeleton and restriction ring, and the spiral skeleton made of medical plastic is embedded in the spiral groove of the outer tube to provide elastic support and prevent the catheter from collapsing; Sandwich restriction ring: Multiple annular restriction rings are set on the outer wall of the inner tube, with a spacing of 1-2mm. The restriction rings conflict with each other during bending, limiting the bending angle to ≤45°; Inner pipe extension groove: longitudinal extension grooves are set on the inner wall to reduce liquid residue and assist in flushing and cleaning; The catheter is composed of three composite layers: an outer tube containing a spiral skeleton, an interlayer containing a restriction ring array, and an inner tube containing an extended surface groove.

10. The highly safe infusion port according to claim 1, characterized in that: The liquid inlet cavity (101) is provided with an inclined plate, a blocking plate, and an expansion plate to link the valve, and the symmetrical inclined plates form a gradually shrinking liquid inlet; the blocking plate slides, and the liquid medicine pushes the through plate to open, and the expansion plate is pressed and closed when blood flows back. The blocking plate is made of silicone, and the area of ​​the expansion plate is 1.5 times that of the blocking plate, thereby enhancing the blood driving force.

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