Infusion port

Abstract

The invention discloses an infusion port which is characterized by comprising an injection seat shell (1), a channel (2) is arranged at the upper end of the injection seat shell (1), a guide pipe (3) is arranged at the lower end of the injection seat shell (1), and the infusion port is characterized in that a first cavity (4), a filter plate (6) and a second cavity (5) are arranged in the injection seat shell (1); an anti-backflow box (13) is fixedly arranged in the lower end of the injection seat shell (1), a discharge port (14) is formed in the upper portion of the anti-backflow box (13), a discharge channel (18) is formed in the anti-backflow box (13) and communicated with a guide pipe (3) of the discharge port (14), and an elastic piece (19) is fixedly arranged on the inner wall of the lower end of the discharge channel (18); and the inner wall of the upper end of the discharge channel (18) is fixedly provided with a stop block (20) which is inclined by more than 90 degrees towards the direction close to the discharge port (14). The catheter can be used for preventing smooth circulation of liquid from being hindered when the catheter is bent or pressed externally and preventing blood from flowing backwards when infusion is stopped.

Description

Technical Field

[0001] This invention relates to an infusion port. Background Technology

[0002] An infusion port, medically known as an implantable venous access port, is a fully implanted vascular access system primarily used for patients requiring long-term intravenous infusions, such as chemotherapy patients. An infusion port mainly consists of two core components: the injection port housing and the catheter. Currently, the injection port housing is typically designed with a flat, round, cap-like structure, while the catheter is made of silicone. This material not only has good biocompatibility but is also soft and elastic, allowing it to adapt to various body positions. However, after implantation, when the infusion stops, the pressure change at the catheter's location can easily cause blood backflow, leading to catheter blockage. The presence of precipitated medication during infusion can also easily cause thrombosis. Furthermore, due to the relatively small diameter and smooth inner wall design of the catheter, when the catheter is bent or subjected to external pressure, the inner wall may become too tight, reducing the effective diameter of the infusion channel and thus hindering the smooth flow of fluids. Summary of the Invention

[0003] In view of the above-mentioned defects in the prior art, the purpose of the present invention is to provide an infusion port that can solve the problem of blood backflow that easily occurs when the infusion is stopped in commercially available infusion ports.

[0004] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides an infusion port, comprising an injection port housing (1), wherein the upper end of the injection port housing (1) is provided with a channel (2) for an infusion needle (24) to pass through therethrough, and the lower end of the injection port housing (1) is provided with a conduit (3). The upper inner wall of the injection port housing (1) is provided with a silicone sealing block for sealing the channel (2) after the needle (24) is removed from the channel (2). The injection seat housing (1) has a first chamber (4), a filter plate (6) and a second chamber (5) arranged sequentially from one end near the channel (2) to one end near the catheter (3), with the filter plate (6) being isolated between the first chamber (4) and the second chamber (5); An anti-backflow box (13) is fixedly installed inside the lower end of the injection seat housing (1). An outlet (14) is provided above the anti-backflow box (13). The outlet (14) is connected to the interior of the second chamber (5). An outlet channel (18) is provided inside the anti-backflow box (13). The outlet channel (18) is L-shaped. One end of the outlet channel (18) is connected to the outlet (14), and the other end of the outlet channel (18) is connected to the conduit (3). An elastic sheet (19) is fixedly installed on the inner wall of the lower end of the outlet channel (18). The upper end of the elastic sheet (19) is inclined toward the conduit (3), and a gap is left between the upper end of the elastic sheet (19) and the upper inner wall of the outlet channel (18) for the liquid to pass through. A stop block (20) is also fixedly installed on the inner wall of the upper end of the outlet channel (18) to prevent the elastic sheet (19) from tilting more than 90 degrees toward the outlet (14).

[0005] As a further improvement of the present invention: the inner wall of the conduit (3) is densely provided with expansion grooves (21), the expansion grooves (21) are in the shape of plum blossoms, and two adjacent expansion grooves (21) are connected to each other on the extension path of the conduit (3), and several expansion grooves (21) on the extension path of the conduit (3) form an expansion flow channel.

[0006] As a further improvement of the present invention: the radial cross section of the discharge channel (18) is rectangular.

[0007] As a further improvement of the present invention: the upper surface of the filter plate (6) is provided with a collection groove (8), there are two collection grooves (8), the collection grooves (8) are funnel-shaped, the bottom of the filter plate (6) is provided with two collection pipes (9), the two collection pipes (9) are respectively connected to the lower end of the two collection grooves (8), the lower end of the injection seat housing (1) is fixedly provided with a collection box (10), the collection box (10) is located on the side of the anti-backflow box (13), and the lower ends of the two collection pipes (9) are connected to the interior of the collection box (10); The collection box (10) is equipped with a baffle (11) inside. The baffle (11) is a plate structure with one end tilted downward and the other end fixedly connected to the inner wall of the collection box (10). Multiple baffles (11) are provided, and multiple baffles (11) are distributed in an alternating manner on the inner wall of the opposite side of the collection box (10).

[0008] As a further improvement of the present invention: the bottom of the injection seat housing (1) is provided with a drain port (15), the drain port (15) is connected to the inside of the collection box (10), and a sealing cap (12) is connected to the drain port (15) by threaded connection.

[0009] As a further improvement of the present invention: the bottom of the silicone sealing block is provided with an elastic silicone sealing sheet (7) that can help guide the flow of liquid. One end of the elastic silicone sealing sheet (7) is fixed to the inner wall of the injection seat housing (1), and the other end is suspended in the first chamber (4).

[0010] As a further improvement of the present invention: the surface of the seat cover (16) of the injection seat housing (1) is embedded with a power supply and a pressure monitoring unit (17) for monitoring the external pressure on the injection seat housing (1). The pressure monitoring unit (17) uses: Novel pressure distribution system, wireless implantable tactile pressure sensing system or MODEL 8402 series miniature pressure sensor. The outer wall of the catheter (3) is provided with an annular groove (22), which is annular and contains a developing element (23). The pressure monitoring unit (17), the imaging element (23), and the power supply are electrically connected, and are all wirelessly connected to the receiver at the nurse station.

[0011] As a further improvement of the present invention: the outer wall of the developing element (23) is smooth and the outer wall of the conduit (3) is consistent with the outer diameter of the developing element (23) and the conduit (3).

[0012] The technical effects and advantages of this invention are as follows: 1. The infusion port provided by the present invention is equipped with an anti-backflow box to prevent blood from flowing back when the infusion port is stopped. At the same time, an expansion groove is set inside the catheter to effectively avoid the problem of the catheter being obstructed from flowing smoothly when it is bent or subjected to external pressure.

[0013] 2. The infusion port provided by the present invention separately intercepts and collects precipitated drugs, reducing the occurrence of thrombosis and other conditions. The precipitated drugs are collected in the collection tank and then discharged into the collection box for collection, ensuring the filtration efficiency of the filter plate for the drug solution and not affecting the flow performance of the drug solution.

[0014] 3. The infusion port provided by the present invention is based on the wireless transmission connection of the imaging element, pressure monitoring unit and the receiver of the nurse station on the seat cover, which can realize the purpose of remote real-time monitoring of the pressure of the infusion port, reduce the risk of use, and eliminate the need for manual real-time monitoring and inspection.

[0015] 4. The infusion port provided by this invention has high safety for patients. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of the infusion port of the present invention.

[0017] Figure 2 This is a schematic diagram of the internal structure of the infusion port of the present invention from one perspective.

[0018] Figure 3 This is a schematic diagram of the internal structure of the infusion port of the present invention from another perspective.

[0019] Figure 4 This is a three-dimensional cross-sectional view of the infusion port structure of the present invention.

[0020] Figure 5 This is a cross-sectional view of the infusion port structure of the present invention.

[0021] Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle.

[0022] Figure 7 This is a schematic diagram of the infusion port of the present invention during infusion operation.

[0023] Figure 8 This is a schematic diagram of the infusion port of the present invention in preventing blood backflow.

[0024] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point B.

[0025] Figure 10 This is a schematic diagram of the catheter structure of the present invention.

[0026] Figure 11 This is an axial sectional view of the catheter of the present invention.

[0027] In the diagram: 1. Injection seat housing; 2. Channel; 3. Tube; 4. First chamber; 5. Second chamber; 6. Filter plate; 7. Elastic silicone sealing sheet; 8. Collection tank; 9. Collection tube; 10. Collection box; 11. Baffle; 12. Sealing cap; 13. Anti-backflow box; 14. Discharge port; 15. Sewage outlet; 16. Seat cover; 17. Pressure monitoring unit; 18. Discharge channel; 19. Elastic sheet; 20. Baffle; 21. Expansion tank; 22. Annular groove; 23. Imaging element; 24. Infusion needle. Detailed Implementation

[0028] This invention provides, for example Figures 1-11 The infusion port shown can be used to prevent the catheter 3 from being bent or subjected to external pressure, thus preventing the smooth flow of fluid and the backflow of blood when the infusion is stopped.

[0029] refer to Figure 1 As shown, the infusion port includes an injection port housing 1, which is a flat, round cap shape. The upper end of the injection port housing 1 is provided with a channel 2 for the infusion needle to pass through it, and the lower end of the injection port housing 1 is provided with a catheter 3. The catheter 3 is made of silicone material.

[0030] refer to Figures 2 to 6As shown in the figure, the injection port housing 1 of the present invention has a first chamber 4, a filter plate 6, and a second chamber 5 arranged sequentially from the end near the channel 2 to the end near the conduit 3. The filter plate 6 is isolated between the first chamber 4 and the second chamber 5. The filter plate 6 can be a titanium filter or other filtration device, which can effectively remove particles, impurities, and microorganisms from the drug solution, ensuring the purity and safety of the drug, while having little impact on the effective components of the drug solution. An anti-backflow box 13 is also fixedly installed inside the lower end of the injection port housing 1. An outlet 14 is provided above the anti-backflow box 13. The outlet 14 is connected to the interior of the second chamber 5. The box 13 has an internal discharge channel 18, which is L-shaped. One end of the discharge channel 18 is connected to the discharge outlet 14, and the other end is connected to the conduit 3. The radial cross-section of the discharge channel 18 is rectangular. An elastic sheet 19 is fixedly installed on the lower inner wall of the discharge channel 18. The upper end of the elastic sheet 19 is inclined towards the conduit 3, and a gap is left between the upper end of the elastic sheet 19 and the upper inner wall of the discharge channel 18 for the medicine to pass through. A stop block 20 is also fixedly installed on the upper inner wall of the discharge channel 18 to prevent the elastic sheet 19 from tilting more than 90 degrees towards the discharge outlet 14.

[0031] During operation, the medication is input into the injection chamber 1 through channel 2. After being filtered by filter plate 6, the medication enters the second chamber 5. The medication in the second chamber 5 passes through outlet 14, outlet channel 18, and catheter 3 in sequence before being output. When the medication passes through elastic plate 19, it pushes the elastic plate 19 to continue tilting closer to catheter 3, which increases the distance between the upper end of elastic plate 19 and the inner wall above outlet channel 18, ensuring the medication is discharged. When the infusion is stopped, if blood flows back through outlet channel 18, the force of the blood pushing elastic plate 19 will cause it to tilt closer to outlet 14, thus adhering to the stop block 20, temporarily blocking outlet channel 18, preventing blood backflow when the infusion is stopped, and simultaneously ensuring that the infusion is not affected.

[0032] It should be noted that there can be several elastic sheets 19 and baffles 20, thereby increasing the effect of preventing blood backflow.

[0033] Considering that intravenous infusion contains precipitated drugs, which can easily cause thrombosis, this invention includes a filter plate 6. The filter plate 6 can also be made of other suitable materials, such as rubber filter plates, composite material filter plates, etc.

[0034] Furthermore, the present invention provides two collection grooves 8 on the upper surface of the filter plate 6, each funnel-shaped. Two collection pipes 9 are provided at the bottom of the filter plate 6, and the two collection pipes 9 are respectively connected to the lower ends of the two collection grooves 8. A collection box 10 is also fixedly installed inside the lower end of the injection seat housing 1. The collection box 10 is located on the side of the anti-backflow box 13, and the lower ends of the two collection pipes 9 are connected to the interior of the collection box 10. When the filter plate 6 filters the drug solution, the precipitated drug will gather in the collection groove 8 and enter the collection box 10 through the collection pipes 9 due to gravity. The drug solution will eventually enter the second chamber 5 after being filtered by the filter plate 6, and the precipitated drug will be separately intercepted and collected, reducing the occurrence of thrombosis and other situations. The precipitated drug is collected in the collection groove 8 and then discharged into the collection box 10 for collection, ensuring the filtration efficiency of the filter plate 6 for the drug solution and not affecting the flow performance of the drug solution.

[0035] Furthermore, a baffle 11 is provided inside the collection box 10. The baffle 11 is a plate structure with one end tilted downward and the other end fixedly connected to the inner wall of the collection box 10. Multiple baffles 11 are provided, and multiple baffles 11 are distributed in an alternating manner on the inner wall of the opposite side of the collection box 10, thereby achieving the phenomenon of blocking the backflow of precipitated drugs.

[0036] refer to Figure 2 and Figure 3 As shown, a drain port 15 is provided at the bottom of the injection housing 1. The drain port 15 is connected to the inside of the collection box 10. A sealing cap 12 is connected to the drain port 15 by a threaded connection. When the sealing cap 12 is opened, the precipitated drug in the collection box 10 can be cleaned, which is convenient for reuse or cleaning.

[0037] refer to Figure 2 , Figures 4 to 7 As shown, the upper inner wall of the injection port housing 1 is provided with a silicone sealing block for sealing the channel 2 after the needle 24 is removed from the channel 2. The silicone sealing block is a structural feature of existing infusion ports. An elastic silicone sealing sheet 7 is provided close to the bottom of the silicone sealing block to help guide the flow of the infusion fluid. When the infusion is stopped, the elastic silicone sealing sheet 7 plays a role in assisting in sealing the channel 2. Specifically, when the infusion needle 24 is inserted from the channel 2, the infusion needle 24 pierces the silicone sealing block, so that the bottom of the channel 2 is connected to the inside of the first chamber 4. The silicone sealing block has the characteristic of being able to be pierced repeatedly. Its working principle is to realize the one-way valve function through a three-valve design. When the infusion needle 24 is inserted, the silicone sealing block is pressed open to form a channel. After the needle is removed, it automatically closes to prevent blood backflow. It is a commercially available product and will not be described in detail here.

[0038] refer to Figure 7 The image shown is an internal cross-sectional view of the injection port housing 1. When the infusion needle 24 is not inserted, the silicone sealing block blocks the channel 2. (See reference...) Figure 8As shown, one end of the elastic silicone sealing sheet 7 is fixed to the inner wall of the injection seat housing (1), and the other end is suspended in the first chamber (4). When the infusion needle 24 is inserted into the channel 2 and the silicone sealing block, it touches the elastic silicone sealing sheet 7 and tilts open. Through its guiding effect, the liquid medicine passes through the first chamber 4, the filter plate 6, the second chamber 5, the outlet 14, and the outlet channel 18 in sequence and then enters the catheter 3.

[0039] refer to Figure 8 and Figure 9 The diagram shows the state of blood flowing back in the conduit 3. When the blood flows back into the discharge channel 18, it can push the elastic sheet 19 to rotate and block the discharge channel 18, thus preventing blood from flowing back.

[0040] refer to Figure 10 and Figure 11 As shown, the present invention improves the conduit 3 to prevent obstruction of smooth liquid flow when the conduit 3 is bent or subjected to external pressure. Specifically, the inner wall of the conduit 3 is densely provided with expansion grooves 21, which have a plum blossom-shaped structure. Two adjacent expansion grooves 21 are connected to each other on the extension path of the conduit 3, and several expansion grooves 21 form an expansion flow channel on the extension path of the conduit 3. The design of the expansion grooves 21 and the expansion flow channel ensures that the conduit 3 can still maintain a relatively smooth fluid channel when subjected to external pressure or bending, so as to allow for smooth flow of infusion. This feature effectively prevents serious flow channel blockage after bending or pressure due to the smooth inner wall of the conduit 3, thereby greatly improving the safety of use.

[0041] Furthermore, an annular groove 22 is formed on the outer wall of the catheter 3. The annular groove 22 is annular and a reflective element 23 is embedded in the annular groove 22. The outer wall of the reflective element 23 and the outer wall of the catheter 3 are both smooth and the outer diameter of the reflective element 23 is consistent with that of the catheter 3. The annular groove 22 is a groove formed on the outer wall of the catheter 3 during the processing of the catheter 3. The reflective element 23 is installed manually or manually in the later stage. Several reflective elements 23 are set along the extension path of the catheter 3. The reflective element 23 is made of medical titanium alloy and is set in the shape of fine wires. The distance between two reflective elements 23 is 1cm-4cm.

[0042] In this invention, by setting the imaging element 23 in the annular groove 22, compared with the traditional technique of spirally winding imaging wire on the outside of the catheter 3 to ensure that the position of the catheter 3 can be clearly identified during CT imaging, this invention can effectively achieve imaging of the catheter 3 while effectively ensuring the smoothness of the outside of the catheter 3, ensuring that the catheter 3 always maintains excellent penetration and passage.

[0043] In summary, the infusion port of the present invention overcomes the drawbacks of commercially available infusion port catheters, such as obstruction of smooth fluid flow when bent or subjected to external pressure, and backflow of blood when infusion is stopped.

[0044] As an extension, the seat cover 16 of the injection port housing 1 in this invention has a power supply and a pressure monitoring unit 17 embedded on its surface for monitoring the external pressure on the injection port housing 1. The power supply, pressure monitoring unit 17 and imaging element are electrically connected and are all wirelessly connected to the receiver at the nurse station. The pressure monitoring unit 17 uses a Novel pressure distribution system, a wireless implantable tactile pressure sensing system or a MODEL 8402 series miniature pressure sensor, which is suitable for embedding in the human body and has wireless transmission function. The pressure monitoring unit 17 can monitor the pressure on the surface of the seat cover 16 in real time. If the pressure is severe, it can easily cause pressure sores or problems such as the infusion port not working properly. If a receiver is installed in the nurse station as an external device, the pressure monitoring unit 17 will send the monitored pressure data to the receiver at the nurse station in real time. The receiver uses the JUMO Wtrans receiver T01. The Novel pressure distribution system, the wireless implantable tactile pressure sensing system, the MODEL 8402 series miniature pressure sensor and the receiver are all commercially available products and will not be described in detail here. In this invention, a pressure monitoring unit 17 is provided on the seat cover 16, which can realize the purpose of remote real-time monitoring of the pressure of the infusion port, reduce the risk of use, and eliminate the need for manual real-time monitoring and inspection.

[0045] In addition, temperature sensors are embedded on the upper surface of the seat cover 16 to monitor the body temperature in real time. Similarly, those skilled in the art can also set various sensors on the upper surface of the seat cover 16 to automatically monitor different data parameters around the infusion port and reduce medical work.

[0046] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention. Furthermore, it should be understood that after reading the technical description of this invention, those skilled in the art can make various modifications, alterations, and / or variations to the invention, and all such equivalent forms also fall within the scope of protection defined by the appended claims. As is known from common technical knowledge, the invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the embodiments disclosed above are merely illustrative in all respects and are not exhaustive. All changes within the scope of this invention or equivalent to the scope of this invention are included in this invention.

Claims

1. An infusion port, comprising an injection port housing (1), wherein the upper end of the injection port housing (1) is provided with a channel (2) for an infusion needle (24) to pass through therethrough, and the lower end of the injection port housing (1) is provided with a conduit (3), and the inner wall of the upper end of the injection port housing (1) is provided with a silicone sealing block for sealing the channel (2) after the needle (24) is removed from the channel (2), characterized in that: The injection seat housing (1) has a first chamber (4), a filter plate (6) and a second chamber (5) arranged sequentially from one end near the channel (2) to one end near the catheter (3), with the filter plate (6) being isolated between the first chamber (4) and the second chamber (5); An anti-backflow box (13) is fixedly installed inside the lower end of the injection seat housing (1). An outlet (14) is provided above the anti-backflow box (13). The outlet (14) is connected to the interior of the second chamber (5). An outlet channel (18) is provided inside the anti-backflow box (13). The outlet channel (18) is L-shaped. One end of the outlet channel (18) is connected to the outlet (14), and the other end of the outlet channel (18) is connected to the conduit (3). An elastic sheet (19) is fixedly installed on the inner wall of the lower end of the outlet channel (18). The upper end of the elastic sheet (19) is inclined toward the conduit (3), and a gap is left between the upper end of the elastic sheet (19) and the upper inner wall of the outlet channel (18) for the liquid to pass through. A stop block (20) is also fixedly installed on the inner wall of the upper end of the outlet channel (18) to prevent the elastic sheet (19) from tilting more than 90 degrees toward the outlet (14).

2. The infusion port according to claim 1, characterized in that: The inner wall of the conduit (3) is densely provided with expansion grooves (21). The expansion grooves (21) are in the shape of plum blossoms. Two adjacent expansion grooves (21) are connected on the extension path of the conduit (3). Several expansion grooves (21) on the extension path of the conduit (3) form an expansion flow channel.

3. The infusion port according to claim 1, characterized in that: The radial cross-section of the discharge channel (18) is rectangular.

4. The infusion port according to claim 1, characterized in that: The filter plate (6) has a collection groove (8) on its upper surface. There are two collection grooves (8). The collection grooves (8) are funnel-shaped. There are two collection pipes (9) at the bottom of the filter plate (6). The two collection pipes (9) are respectively connected to the lower ends of the two collection grooves (8). A collection box (10) is fixedly installed inside the lower end of the injection seat housing (1). The collection box (10) is located on the side of the anti-backflow box (13). The lower ends of the two collection pipes (9) are connected to the inside of the collection box (10). The collection box (10) is equipped with a baffle (11) inside. The baffle (11) is a plate structure with one end tilted downward and the other end fixedly connected to the inner wall of the collection box (10). Multiple baffles (11) are provided, and multiple baffles (11) are distributed in an alternating manner on the inner wall of the opposite side of the collection box (10).

5. The infusion port according to claim 1, characterized in that: The bottom of the injection seat housing (1) is provided with a drain port (15), which is connected to the inside of the collection box (10). A sealing cap (12) is connected to the drain port (15) by a threaded connection.

6. The infusion port according to claim 1, characterized in that: The bottom of the silicone sealing block is provided with an elastic silicone sealing sheet (7) that helps to guide the flow of liquid. One end of the elastic silicone sealing sheet (7) is fixed to the inner wall of the injection seat housing (1), and the other end is suspended in the first chamber (4).

7. The infusion port according to claim 1 or 5, characterized in that: The surface of the seat cover (16) of the injection seat housing (1) is embedded with a power supply and a pressure monitoring unit (17) for monitoring the external pressure on the injection seat housing (1). The pressure monitoring unit (17) uses: Novel pressure distribution system, wireless implantable tactile pressure sensing system or MODEL 8402 series miniature pressure sensor. The outer wall of the catheter (3) is provided with an annular groove (22), which is annular and contains a developing element (23). The pressure monitoring unit (17), the imaging element (23), and the power supply are electrically connected, and are all wirelessly connected to the receiver at the nurse station.

8. The infusion port according to claim 7, characterized in that: The outer wall of the developing element (23) is smooth and the outer wall of the conduit (3) is consistent with the outer diameter of the developing element (23) and the conduit (3).

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