A high-performance implantable infusion port

Abstract

The present application provides a high-performance implantable infusion port, which includes a puncture seat, a puncture membrane, a venous catheter and a catheter lock, wherein the top of the puncture seat is concave to form a liquid storage cavity; the puncture membrane is connected to the top of the port seat and covers the liquid storage cavity; the venous catheter is connected to the liquid storage cavity; the catheter lock is provided with a through hole along the axial direction, one end of the catheter lock is connected to the puncture seat, and the other end thereof is connected to the venous catheter, so that the venous catheter is connected to the liquid storage cavity; wherein the venous catheter includes an inner sleeve and an outer sleeve, and the inner sleeve or the outer sleeve is connected to the catheter lock; the outer sleeve is arranged on the outside of the inner sleeve, and its two ends are connected to the side walls of the inner sleeve, so that the outer sleeve and the inner sleeve form a sealed cavity, and the sealed cavity is provided with filling gas to solve the technical problem that the existing venous catheter is prone to bending and clogging, thereby causing non-thrombotic clogging.

Description

Technical Field

[0001] The present application relates to the field of medical equipment technology, and in particular to a high-performance implantable infusion port. Background Art

[0002] An implantable venous access port (IVAP) is a fully implanted infusion drug delivery system buried in the human body, also known as an implantable drug delivery device. An implantable venous access port consists of a puncture seat for puncture and a venous catheter system. The end of the venous catheter is connected to the puncture seat. The puncture seat and the venous catheter are completely buried in the body, with the characteristics of long retention time and few complications. After the infusion port is implanted, the patient's daily life can be unrestricted and the quality of life can be improved.

[0003] In actual clinical practice, the puncture needle needs to be used in conjunction with the infusion port. When the drug solution needs to be injected, the puncture needle is inserted into the puncture seat to form a needle channel in the puncture seat. After the puncture needle passes through the needle channel and injects the drug solution into the liquid storage cavity in the infusion port, the drug solution is then injected into the patient's body through the intravenous catheter. The infusion port can be used for drug infusion, fluid replacement, nutritional support, blood transfusion and other treatments, and can also be used for blood sample collection.

[0004] Since the intravenous catheter is connected to the puncture seat through a catheter lock, positive pressure sealing is often used after the infusion is completed; at the same time, the patient's blood vessels are non-straight and often have bends. When the intravenous catheter is partially inserted into the blood vessel, the existing intravenous catheter is prone to bends and blockages. When the intravenous catheter placed in the blood vessel is bent, kinked or coiled, it will cause non-thrombotic blockage, which will have a certain impact on the patient's treatment and even endanger the patient's life safety. Summary of the invention

[0005] The present application provides a high-performance implantable infusion port to solve the technical problem that the existing venous catheters are prone to bend and blockage, thereby causing non-thrombotic blockage.

[0006] The present application provides a high-performance implantable infusion port, which includes a puncture seat, a puncture membrane, a venous catheter and a catheter lock, wherein the top of the puncture seat is concave to form a liquid storage cavity; the puncture membrane is connected to the top of the port seat and covers the liquid storage cavity; the venous catheter is connected to the liquid storage cavity; the catheter lock is provided with a through hole axially penetrating therethrough, one end of the catheter lock is connected to the puncture seat, and the other end thereof is connected to the venous catheter, so that the venous catheter is connected to the liquid storage cavity; wherein the venous catheter includes an inner sleeve and an outer sleeve, and the inner sleeve or the outer sleeve is connected to the catheter lock; the outer sleeve is provided on the outside of the inner sleeve, and its two ends are connected to the side walls of the inner sleeve, so that the outer sleeve and the inner sleeve form a sealed cavity, and a filling gas is provided in the sealed cavity.

[0007] Optionally, the intravenous catheter includes two outer sleeves, each of which has an arc-shaped or semicircular cross-section along its axial direction; the two outer sleeves symmetrically cover part of the outer side wall of the inner sleeve.

[0008] Optionally, in the axial cross section along the intravenous catheter, the central angle of the outer sleeve is an obtuse angle.

[0009] Optionally, the intravenous catheter further comprises a sleeve, which is disposed between the inner sleeve and the outer sleeve and adhered to the inner wall of the outer sleeve; the sleeve is made of a shape memory material.

[0010] Optionally, the inner sleeve is made of medical silicone material; the outer sleeve is made of a plastic material with shape memory.

[0011] Optionally, the catheter lock includes a first fixed segment and a second fixed segment connected, the first fixed segment is connected to the puncture seat, and the second fixed segment is connected to the intravenous catheter; the aperture of the first fixed segment is larger than the aperture of the second fixed segment, and a Venturi structure is formed at the junction of the first fixed segment and the second fixed segment.

[0012] Optionally, an accelerating tube is formed at the end of the inner sleeve, and the inner diameter of the inner sleeve is larger than the inner diameter of the accelerating tube, so that a Venturi structure is formed at the junction of the inner sleeve and the accelerating tube.

[0013] Optionally, the density of the inner sleeve and the outer sleeve is the same as the density of blood.

[0014] Optionally, the puncture seat is made of ceramic.

[0015] Optionally, at least two positioning marks are evenly distributed on the top of the puncture seat.

[0016] The present application provides a high-performance implantable infusion port, which uses an outer sleeve and an inner sleeve to form a sealed cavity, and fills the sealed cavity with filling gas, so that the intravenous catheter is not easy to bend when inside the blood vessel, which can reduce the resistance of the intravenous catheter when passing through and pulling out, and reduce the damage to the blood vessels and human tissues. At the same time, since the puncture seat and the intravenous catheter need to be kept in the patient's body for a long time after being placed in the patient's body, the above-mentioned intravenous catheter can ensure that the inner sleeve can still maintain a conductive state when it is bent, thereby preventing the occurrence of medical accidents.

[0017] The Venturi structure at the junction of the first fixed section and the second fixed section can quickly transfer the liquid medicine in the liquid storage cavity to the interior of the intravenous catheter, and the Venturi structure at the junction of the inner sleeve and the accelerating catheter can quickly transfer the liquid medicine in the inner sleeve to the interior of the blood vessel. The Venturi structure at the catheter lock and the Venturi structure at the intravenous catheter can increase the flow rate of the liquid medicine at different positions multiple times, so that the liquid medicine can maintain a faster flow rate when it flows out of the intravenous catheter into the blood vessel, so that the irritant drug can be quickly diluted and spread, thereby reducing the damage caused by the drug to the patient's blood vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of the structure of a high-performance implantable infusion port provided by the present application;

[0020] Figure 2 It is a schematic structural diagram of a puncture seat in a high-performance implantable infusion port provided by the present application;

[0021] Figure 3 It is an axial cross-sectional view of a venous catheter in a high-performance implantable infusion port provided by the present application;

[0022] Figure 4 The radial cross-section of the high-performance implantable infusion port provided by the present application is Figure 1 ;

[0023] Figure 5 The radial cross-section of the high-performance implantable infusion port provided by the present application is Figure 2 .

[0024] Description of reference numerals:

[0025] 100, puncture seat; 110, positioning mark; 120, puncture membrane; 200, intravenous catheter; 210, outer sleeve; 220, inner sleeve; 230, sleeve body; 240, acceleration catheter; 250, sealing cavity; 300, catheter lock; 310, first fixed section; 320, second fixed section. DETAILED DESCRIPTION

[0026] 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application and are not used to limit the present application. In the present application, unless otherwise stated, the directional words used, such as "up", "down", "left", and "right", generally refer to the up, down, left, and right of the device in actual use or working state, specifically the drawing direction in the accompanying drawings.

[0027] The present application provides a high-performance implantable infusion port, which is described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0028] See also Figure 1 and Figure 2 The present application provides a high-performance implantable infusion port, which is used for drug infusion, fluid replacement, nutritional support, blood transfusion and other treatments, and can also be used for blood sample collection. The implantable infusion port includes a puncture seat 100, a puncture membrane 120, a catheter lock 300 and a venous catheter 200. Among them, the top of the puncture seat 100 is concave to form a liquid storage cavity. The puncture membrane 120 is fixed to the top of the port seat and completely covers the above liquid storage cavity. The puncture membrane 120 can be made of a silicone septum with a thickness of more than 2 cm. When using a non-destructive needle for puncture, it can withstand 2000 non-destructive punctures of 22G and 1000 non-destructive punctures of 20G.

[0029] See also Figure 1 The catheter lock 300 has a through hole extending through the axial direction thereof. One end of the catheter lock 300 is connected to the puncture seat 100, and the other end is connected to the intravenous catheter 200, so that the intravenous catheter 200 is connected to the liquid storage cavity. The puncture seat 100, the catheter lock 300 and the intravenous catheter 200 are all completely buried in the patient's body. In actual clinical practice, the puncture needle needs to be used in conjunction with the infusion port. When it is necessary to inject liquid medicine, the puncture needle is inserted into the puncture seat 100 to form a needle channel in the puncture seat 100. After the puncture needle passes through the needle channel to input the liquid medicine into the liquid storage cavity in the puncture seat 100, the intravenous catheter 200 then inputs the liquid medicine into the patient's blood vessel.

[0030] See also Figure 1 In order to improve the safety of drug use and avoid affecting the radiotherapy effect, the material of the puncture seat 100 in the present application is preferably ceramic.

[0031] See also Figure 1 and Figure 2 Since the puncture seat 100 is used in conjunction with the puncture needle, at least two positioning marks 110 are evenly distributed on the top of the puncture seat 100. The positioning marks 110 can be identification lights, color dots with strong contrast, or other identifiable and harmless objects.

[0032] By using the positioning mark 110 disposed on the top of the puncture seat 100, it is possible to avoid wasting too much time on the problem of position determination, thereby improving the positioning accuracy and positioning efficiency.

[0033] See also Figure 1 and Figure 3 The intravenous catheter 200 includes an inner sleeve 220 and an outer sleeve 210. The inner sleeve 220 or the outer sleeve 210 is connected to the catheter lock 300, so that the intravenous catheter 200 can be connected to the puncture seat 100 through the catheter lock 300. The outer sleeve 210 is arranged outside the inner sleeve 220, and both ends of the outer sleeve 210 are connected to the side wall of the inner sleeve 220, so that the inner side of the outer sleeve 210 and the outer side of the inner sleeve 220 form a sealed cavity 250, and the sealed cavity 250 is filled with gas.

[0034] See also Figure 1 and Figure 3 Since the intravenous catheter 200 is connected to the puncture seat 100 through the catheter lock 300, the infusion port usually uses positive pressure to seal the tube after the infusion is completed; at the same time, the patient's blood vessels are non-straight tubes and are mostly curved. When the intravenous catheter 200 is partially inserted into the blood vessel, the existing intravenous catheter 200 is prone to bends and blockages. When the intravenous catheter 200 placed in the blood vessel is bent, kinked or coiled, it will cause non-thrombotic blockage.

[0035] Therefore, the outer sleeve 210 and the inner sleeve 220 are used to form a sealed cavity 250, and the sealed cavity 250 is filled with filling gas, so that the intravenous catheter 200 is not easy to bend when inside the blood vessel, which can reduce the resistance of the intravenous catheter 200 when passing through and pulling out, and reduce the damage to the blood vessel and human tissue. At the same time, since the puncture seat 100 and the intravenous catheter 200 need to be kept in the patient's body for a long time after being placed in the patient's body, the intravenous catheter 200 can ensure that the inner sleeve 220 can still maintain a conductive state when it is bent, thereby preventing the occurrence of medical accidents.

[0036] See also Figure 4 and Figure 5The intravenous catheter 200 includes two outer sleeves 210, each of which has an arc-shaped or semi-circular cross section along its axial direction, and the central axis of the outer sleeve 210 coincides with the central axis of the inner sleeve 220, so that the outer sleeve 210 and the inner sleeve 220 are concentric structures. The two outer sleeves 210 symmetrically cover part of the outer wall of the inner sleeve 220. When the area of ​​the outer sleeve 210 attached to the inner sleeve 220 is 1 / 2 of the outer wall of the inner sleeve 220, the side ends of the two outer sleeves 210 can be attached to each other, so that the outer sleeve 210 can completely cover the inner sleeve 220. When the area of ​​the outer sleeve 210 attached to the inner sleeve 220 is less than 1 / 2 of the outer wall of the inner sleeve 220, a distance is left between the side ends of the two outer sleeves 210, so that the outer sleeve 210 does not completely cover the inner sleeve 220.

[0037] See also Figure 4 and Figure 5 The two outer sleeves 210 are symmetrically covered on the outside of the inner sleeve 220, so that the sealing gas can apply a relatively uniform pressure to the outer wall of the inner sleeve 220, so that the inner sleeve 220 can maintain its initial conductive state as much as possible in the curved blood vessel. When the blood in the blood vessel applies a pressure to the venous catheter 200, the filling gas in the sealing cavity 250 can apply a reaction force through the outer sleeve 210, so as to prevent the blood pressure in the blood vessel from affecting the conductive state of the inner sleeve 220.

[0038] See also Figure 3 and Figure 5 In the cross section along the axis of the intravenous catheter 200, the central angle of the outer sleeve 210 is an obtuse angle, so when the two outer sleeves 210 symmetrically cover the outer wall of the inner sleeve 220, a distance is left between the side ends of the two outer sleeves 210, so that the outer sleeve 210 does not completely cover the inner sleeve 220. When the intravenous catheter 200 is inserted into the blood vessel, the two outer sleeves 210 can be pressed to make the intravenous catheter 200 become a flat structure, which can reduce the area of ​​the surgical opening of the blood vessel, reduce the resistance when the intravenous catheter 200 passes through and is pulled out, and reduce damage to the blood vessel and human tissue.

[0039] When the liquid medicine flows through the interior of the intravenous catheter 200, the liquid medicine applies a pressure to the inner sleeve 220, so that the inner sleeve 220 is stretched into a round shape, so that the liquid medicine can quickly flow into the blood vessel. When the tube is sealed with positive pressure, the inner sleeve 220 covered by the outer sleeve 210 is subjected to the pressure applied by the filling gas, while the inner sleeve 220 not covered by the outer sleeve 210 is not subjected to the pressure applied by the filling gas, so that the sealing liquid in the liquid storage cavity and the inner sleeve 220 can be retained for a longer time, thereby improving the sealing effect.

[0040] See also Figure 3The density of the inner sleeve 220 and the outer sleeve 210 is the same as that of blood, so that the intravenous catheter 200 can be suspended in the middle of the blood vessel, thereby preventing the intravenous catheter 200 from contacting the blood vessel wall and preventing the intravenous catheter 200 from causing adverse effects on the blood vessel wall.

[0041] See also Figure 3-Figure 5 The intravenous catheter 200 further includes a sleeve 230, which is located between the inner sleeve 220 and the outer sleeve 210 and is attached to the inner wall of the outer sleeve 210, so that the sleeve 230 is relatively fixed to the outer sleeve 210. In the present application, the sleeve 230 is made of a shape memory material, so that the intravenous catheter 200 can still maintain a good original state after being bent multiple times, thereby reducing the resistance of the intravenous catheter 200 when passing or pulling out, and reducing damage to blood vessels and human tissues.

[0042] See also Figure 3 The inner sleeve 220 is made of medical silicone material to ensure the safety of the drug when used. The outer sleeve 210 is made of a plastic material with shape memory, so that the outer sleeve 210 can still maintain a relatively initial state under the pressure of the blood vessel, reducing the impact of blood pressure on the inner sleeve 220, and can also effectively prevent the intravenous catheter 200 from being squeezed and narrowed and blocked, thereby improving the stability and safety of the intravenous catheter 200 when used.

[0043] See also Figure 3 , an accelerating catheter 240 is formed at the end of the inner sleeve 220, and the inner diameter of the inner sleeve 220 is larger than the inner diameter of the accelerating catheter 240, so that a Venturi structure is formed at the junction of the inner sleeve 220 and the accelerating catheter 240. When the liquid medicine flows from the inner sleeve 220 to the accelerating catheter 240, the dynamic pressure reaches the maximum value and the static pressure reaches the minimum value at the junction of the inner sleeve 220 and the accelerating catheter 240, and the flow rate of the liquid medicine increases due to the reduction in the area of ​​the circulation cross street. The entire surge must undergo the pipeline contraction process at the same time, so the pressure also decreases at the same time, thereby generating a pressure difference, so that the liquid medicine is sucked into the accelerating catheter 240 more quickly and flows out into the blood vessel through the accelerating catheter 240.

[0044] See also Figure 3 When the flow rate of the liquid medicine in the intravenous catheter 200 is low, irritant drugs such as chemotherapy drugs and nutritional support drugs cannot be quickly diluted and spread, thereby causing certain damage to the patient's blood vessels by the irritant drugs. Since the inner diameter of the accelerating catheter 240 is smaller than the inner diameter of the inner sleeve 220, when the liquid medicine flows from the inner sleeve 220 through the accelerating catheter 240, the flow rate of the liquid medicine increases, so the irritant drugs (chemotherapeutic drugs, nutritional support drugs, etc.) can be quickly diluted and spread, thereby reducing the damage caused by the drugs to the patient's blood vessels.

[0045] See also Figure 1 The catheter lock 300 includes a first fixing section 310 and a second fixing section 320 connected at the ends, the first fixing section 310 is connected to the puncture seat 100, and the second fixing section 320 is connected to the intravenous catheter 200, so that the intravenous catheter 200 is connected to the liquid storage chamber of the puncture seat 100 through the catheter lock 300.

[0046] See also Figure 1 , the aperture of the first fixed section 310 is larger than the aperture of the second fixed section 320, so that a Venturi structure is formed at the junction of the first fixed section 310 and the second fixed section 320. When the liquid medicine flows from the liquid storage chamber to the intravenous catheter 200, the dynamic pressure at the junction of the first fixed section 310 and the second fixed section 320 and the internal dynamic pressure of the second fixed section 320 reaches the maximum value, and the static pressure reaches the minimum value. The flow rate of the liquid medicine increases due to the reduction in the area of ​​the circulation cross street. The entire flow must undergo the process of pipeline contraction at the same time, so the pressure also decreases at the same time, thereby generating a pressure difference, so that the liquid medicine is sucked into the intravenous catheter 200 more quickly, thereby accelerating the flow of the liquid medicine into the patient's blood vessels.

[0047] See also Figure 1 When the flow rate of the liquid medicine in the intravenous catheter 200 is low, irritating drugs such as chemotherapy drugs and nutritional support drugs cannot be quickly diluted and spread, thereby causing certain damage to the patient's blood vessels by the irritating drugs. Since the aperture of the first fixed segment 310 is larger than the aperture of the second fixed segment 320, when the liquid medicine flows from the first fixed segment 310 to the second fixed segment 320, the flow rate of the liquid medicine increases, so the irritating drugs (chemotherapeutic drugs, nutritional support drugs, etc.) can be quickly diluted and spread, thereby reducing the damage caused by the drugs to the patient's blood vessels.

[0048] See also Figure 1 In the present application, the Venturi structure at the catheter lock 300 can quickly transfer the liquid medicine in the liquid storage chamber to the interior of the intravenous catheter 200, and the Venturi structure at the intravenous catheter 200 can quickly transfer the liquid medicine in the inner sleeve 220 to the interior of the blood vessel. The Venturi structure at the catheter lock 300 and the Venturi structure at the intravenous catheter 200 can increase the flow rate of the liquid medicine at different positions multiple times, so that the liquid medicine can maintain a faster flow rate when it flows out of the intravenous catheter 200 to the interior of the blood vessel.

[0049] See also Figure 1 and Figure 3Since the internal dimensions of the liquid storage cavity, the catheter lock 300 and the intravenous catheter 200 are significantly different, the liquid medicine ejected from the injection needle has a relatively high flow velocity. However, since the connection area between the liquid storage cavity and the catheter lock 300 is significantly smaller than the cross-sectional area of ​​the liquid storage cavity, the flow velocity of the liquid medicine in the liquid storage cavity is significantly reduced when it flows to the catheter lock 300. At this time, the Venturi structure at the junction of the first fixed section 310 and the second fixed section 320 can accelerate the liquid medicine in the liquid storage cavity to flow into the interior of the catheter lock 300.

[0050] Since the intravenous catheter 200 is long, the flow rate of the liquid medicine will be reduced when it flows inside the intravenous catheter 200. When the liquid medicine flows to the connection between the inner sleeve 220 and the accelerating catheter 240, the venturi structure can make the liquid medicine in the intravenous catheter 200 flow quickly into the blood vessel.

[0051] See also Figure 1 and Figure 3 The present application uses an outer sleeve 210 and an inner sleeve 220 to form a sealed cavity 250, and fills the sealed cavity 250 with filling gas, so that the intravenous catheter 200 is not easy to bend when inside the blood vessel, which can reduce the resistance of the intravenous catheter 200 when passing through and pulling out, and reduce the damage to the blood vessel and human tissue. At the same time, since the puncture seat 100 and the intravenous catheter 200 need to be kept in the patient's body for a long time after being placed in the patient's body, the intravenous catheter 200 can ensure that the inner sleeve 220 can still maintain a conductive state when it is bent, thereby preventing the occurrence of medical accidents.

[0052] The above is a detailed introduction to the high-performance implantable infusion port provided by the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A high-performance implantable infusion port, characterized in that: include: The puncture seat has a top that is concave to form a liquid storage cavity; A puncture membrane connected to the top of the puncture seat and covering the liquid storage cavity; a venous catheter connected to the fluid reservoir; and A catheter lock, which is provided with a through hole in the axial direction, one end of the catheter lock is connected to the puncture seat, and the other end is connected to the venous catheter, so that the venous catheter is connected to the liquid storage chamber; Wherein, the intravenous catheter comprises an inner sleeve and an outer sleeve, and the inner sleeve or the outer sleeve is connected to the catheter lock; The outer sleeve is arranged outside the inner sleeve, and both ends thereof are connected to the side walls of the inner sleeve, so that the outer sleeve and the inner sleeve form a sealed cavity, and a filling gas is arranged in the sealed cavity; The catheter lock comprises a first fixing section and a second fixing section connected, the first fixing section is connected to the puncture seat, and the second fixing section is connected to the intravenous catheter; The aperture of the first fixing section is larger than the aperture of the second fixing section, and a Venturi structure is formed at the junction of the first fixing section and the second fixing section; The intravenous catheter includes two outer sleeves, each of which has an arc-shaped cross section along its axial direction, and a central angle of each outer sleeve is an obtuse angle; the two outer sleeves symmetrically cover part of the outer side wall of the inner sleeve.

2. The high-performance implantable infusion port according to claim 1, characterized in that: The intravenous catheter further comprises: A sleeve body, which is disposed between the inner sleeve and the outer sleeve and is attached to the inner wall of the outer sleeve; The sleeve body is made of shape memory material.

3. The high-performance implantable infusion port according to claim 1, characterized in that: The inner sleeve is made of medical silicone material; The outer sleeve is made of a plastic material with shape memory.

4. The high-performance implantable infusion port according to claim 1, characterized in that: An accelerating conduit is formed at the end of the inner sleeve, and the inner diameter of the inner sleeve is larger than the inner diameter of the accelerating conduit, so that a Venturi structure is formed at the junction of the inner sleeve and the accelerating conduit.

5. The high-performance implantable infusion port according to claim 1, characterized in that: The density of the inner sleeve and the outer sleeve is the same as that of blood.

6. The high-performance implantable infusion port according to claim 1, characterized in that: The material of the puncture seat is ceramic.

7. The high-performance implantable infusion port according to claim 1, characterized in that: At least two positioning marks are evenly distributed on the top of the puncture seat.

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