A subcutaneous hemodialysis port and its components

Abstract

The present invention belongs to the technical field of hemodialysis devices, and specifically discloses a subcutaneous indwelling hemodialysis port and its components, wherein the subcutaneous indwelling hemodialysis port comprises a fixing seat, a puncture septum and a connecting tube, wherein a liquid storage shell is integrally formed on the upper side of the fixing seat; the puncture septum is fixed to the upper side of the fixing seat by an adhesive clamping piece, and the puncture septum sets the liquid storage shell cover in a sealed space between the puncture septum and the fixing seat; the puncture septum comprises an upper diaphragm, a middle diaphragm and a lower diaphragm arranged in sequence from top to bottom, and the side surfaces of the middle diaphragm opposite to the upper diaphragm and the lower diaphragm are provided with staggered oblique teeth, and the elasticity of the middle diaphragm is greater than that of the upper diaphragm and the lower diaphragm; the subcutaneous indwelling hemodialysis port component comprises the aforementioned subcutaneous indwelling hemodialysis port, and a sterile puncture needle, and the sterile puncture needle obliquely passes through the puncture septum; the present invention has the advantages of simple operation and convenient use.

Description

Technical Field

[0001] The present invention belongs to the technical field of hemodialysis devices, and in particular relates to a subcutaneous hemodialysis port and components thereof. Background Art

[0002] Hemodialysis (HD), commonly known as dialysis, is one of the renal replacement therapies for patients with acute and chronic renal failure. It drains the blood from the body of a patient with renal failure to the outside of the body, and passes it through a dialyzer composed of countless hollow fibers. The blood and an electrolyte solution (dialysate) containing a concentration similar to that of the body are exchanged inside and outside the hollow fibers through the principles of diffusion, ultrafiltration, adsorption and convection, thereby removing metabolic waste from the body, maintaining electrolyte and acid-base balance, removing excess water from the body, and returning the purified blood to the patient's body, thereby replacing the kidneys to metabolize toxins and maintaining life.

[0003] In current hemodialysis operations, an arteriovenous fistula is usually created at the distal end of the upper limb. With the help of arterial pressure, the vein is arterialized after a period of time, which increases the blood flow rate and facilitates puncturing the vein during hemodialysis to provide sufficient blood for the hemodialysis equipment. However, as the arteriovenous fistula is used for a long time, the arteriovenous fistula may fail. Therefore, in order to solve the problem of needing to create a new arteriovenous fistula after the arteriovenous fistula fails, and to avoid directly puncturing blood vessels to achieve dialysis, a subcutaneous hemodialysis port has emerged. By burying the hemodialysis port under the skin, only the dialysis port needs to be punctured during the dialysis operation.

[0004] For example, a Chinese utility model patent with authorization announcement number CN215023481U (hereinafter referred to as prior art 1) discloses a hemodialysis port, comprising: a body, a first hemodialysis catheter, and a second hemodialysis catheter, wherein the body is provided with a first liquid storage cavity and a second liquid storage cavity, and the first liquid storage cavity and the second liquid storage cavity are isolated from each other; the hemodialysis port of the application can be completely buried in the body, with no catheter exposed on the surface, and does not need to be disinfected when not in use, so it is not easy to be infected, and the risk of thrombosis and the risk of secondary infection are effectively reduced;

[0005] For another example, the Chinese invention patent with application publication number CN118286537A (hereinafter referred to as prior art 2) discloses an implantable hemodialysis port, including: a puncture septum, which is oval; a base, located on the bottom surface of the puncture septum; two catheter connectors, both connected to the puncture septum; and two catheters, respectively connected to the catheter connectors. The puncture septum includes three layers of diaphragms, namely a first diaphragm, a second diaphragm and a third diaphragm; the first diaphragm, the second diaphragm and the third diaphragm are arranged in sequence from top to bottom, and the second diaphragm is slidably connected to the first diaphragm and the third diaphragm respectively; it also includes an airbag, the deformation end of the airbag after pressing is arranged on one side of the second diaphragm, and the airbag is used to push the second diaphragm to slide; it can improve the defects caused by autologous arteriovenous fistula and artificial arteriovenous fistula;

[0006] However, the above-mentioned prior art has the following problems:

[0007] 1) In the prior art 1, a special puncture needle needs to be used to puncture in a direction perpendicular to the skin. When inserting the puncture needle, if the insertion depth of the puncture needle is not well controlled, the puncture needle may be blocked or the puncture needle left outside is too long, making it difficult to fix the puncture needle;

[0008] 2) In the prior art 2, it is necessary to press the airbag to deform the airbag and push the second diaphragm to slide before puncturing. After the needle is removed and the second diaphragm is reset, the pinholes formed on the three-layer diaphragm are misaligned with each other, making the puncture operation cumbersome. Moreover, once the airbag is damaged, the second diaphragm cannot be moved by pressing the airbag. Summary of the invention

[0009] In order to solve the problems existing in the prior art, the present invention provides a subcutaneous indwelling hemodialysis port and its components, which are easy to operate and convenient to use.

[0010] The technical solution of the present invention is as follows:

[0011] A subcutaneous hemodialysis port comprises a fixing seat, a puncture septum and a connecting tube, wherein a liquid storage shell is integrally formed on the upper side of the fixing seat, the connecting tube is connected to the liquid storage shell, and the connecting tube is communicated with the inside of the liquid storage shell;

[0012] The puncture septum is fixed to the upper side of the fixing seat by means of an adhesive clamp, and the puncture septum sets the liquid storage shell cover in a sealed space between the puncture septum and the fixing seat;

[0013] After the top opening of the liquid storage shell is fixedly connected to the lower side of the puncture septum, the puncture septum and the interior of the liquid storage shell form a liquid storage cavity;

[0014] The puncture septum includes an upper diaphragm, a middle diaphragm and a lower diaphragm arranged in sequence from top to bottom. The side surfaces of the middle diaphragm opposite to the upper diaphragm and the lower diaphragm are provided with staggered oblique teeth. The elasticity of the middle diaphragm is greater than that of the upper diaphragm and the lower diaphragm.

[0015] Furthermore, a connecting block is fixed to the outer edge of the puncture partition, and inner and outer side walls of the lower end of the connecting block are provided with sinking grooves, and the adhesive clamping piece is installed in the sinking grooves.

[0016] Furthermore, the adhesive clamping member includes a hard arc plate and a first elastic connecting member fixed at both ends of the hard arc plate, and the connecting block is provided with a through hole communicating with the outer side wall of the sink and the connecting block located outside the fixing seat.

[0017] Furthermore, an annular T-shaped groove is provided on the upper side of the fixing seat. After the fluid is filled through the through hole, a clamping block composed of a hard arc plate and a first elastic connecting member is clamped at the lower end of the T-shaped groove.

[0018] Furthermore, a second elastic member is fixed to the outer side of the hard arc-shaped plate, and the space between the second elastic member and the hard arc-shaped plate is filled with glue.

[0019] Furthermore, a pointed protrusion is provided on the side wall at the lower end of the T-shaped slot.

[0020] Furthermore, a ring-shaped inverted U-shaped connecting portion is integrally formed on the lower side of the puncture septum, and the upper end of the liquid storage shell is fixedly connected to the inverted U-shaped connecting portion.

[0021] Furthermore, the inner side wall of the inverted U-shaped connecting portion is provided with a first clamping portion inclined upward, and the inner and outer side surfaces of the upper end of the liquid storage shell are provided with a second clamping portion inclined downward.

[0022] Furthermore, the number of the liquid storage shells is two, each of which is connected to one or two connecting tubes, and the connecting tubes pass through the outside of the puncture septum.

[0023] Compared with the prior art, the subcutaneous hemodialysis port provided by the present invention has the following beneficial effects:

[0024] The puncture septum is fixedly connected to the fixing seat by means of an adhesive clamping piece, thereby facilitating the assembly and fixing of the puncture septum and the fixing seat, and ensuring the sealing of the space enclosed by the assembled puncture septum and the fixing seat;

[0025] The puncture septum is composed of an upper diaphragm, a middle diaphragm and a lower diaphragm, and the sides of the middle diaphragm opposite to the upper diaphragm and the lower diaphragm are provided with staggered oblique teeth, and at the same time, the elasticity of the middle diaphragm is greater than that of the upper diaphragm and the lower diaphragm. In this way, during the dialysis puncture process, when the puncture septum is squeezed, the interface between the oblique teeth of the middle diaphragm and the oblique teeth of the upper diaphragm and the lower diaphragm is displaced. After the dialysis is completed, the puncture needle is pulled out, and the puncture holes on the middle diaphragm, the upper diaphragm and the lower diaphragm are staggered, so that the puncture holes are no longer connected, thereby avoiding blood outflow; and when operating the puncture needle, any position of the puncture septum of the dialysis port can be pressed, without pressing a specific position, and the operation is simple.

[0026] A subcutaneous indwelling hemodialysis port assembly comprises the aforementioned subcutaneous indwelling hemodialysis port and a sterile puncture needle, wherein the sterile puncture needle obliquely penetrates the puncture septum.

[0027] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0028] When the dialysis port assembly provided by the present invention is used, it is only necessary to pass the sterile puncture needle obliquely through the puncture septum, which conforms to the operating habits of general hemodialysis puncture and can be used with a commonly used sterile puncture needle, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the structure of a subcutaneous hemodialysis port provided by the present invention;

[0030] Figure 2 A schematic cross-sectional view of the connecting tube of a subcutaneous hemodialysis port provided by the present invention;

[0031] Figure 3 A schematic cross-sectional view of the top opening of the liquid storage shell of the subcutaneous hemodialysis port provided by the present invention;

[0032] Figure 4 for Figure 3 Schematic diagram of the cross section at AA;

[0033] Figure 5 for Figure 3 Schematic diagram of the cross section at BB;

[0034] Figure 6 for Figure 4 The local enlarged schematic diagram of point I in the middle;

[0035] Figure 7 for Figure 5 A partial enlarged schematic diagram of position II in the middle;

[0036] Figure 8 for Figure 5 A partial enlarged schematic diagram of point III in the middle;

[0037] Fig. 9 A schematic diagram of a subcutaneous hemodialysis port assembly provided by the present invention;

[0038] Fig.10 for Fig. 9 A partial enlarged schematic diagram of point C in the middle.

[0039] In the figure: 1. fixing seat, 2. puncture septum, 201. upper diaphragm, 202. middle diaphragm, 203. lower diaphragm, 204. oblique teeth, 205. middle partition, 3. connecting tube, 4. liquid storage shell, 5. connecting block, 7. hard arc plate, 8. first elastic connecting member, 9. T-shaped groove, 10. second elastic member, 11. pointed protrusion, 12. inverted U-shaped connecting part, 1201. first holding part, 1202. second holding part, 13. sterile puncture needle, 14. through hole. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0041] like Figure 1-3 As shown, this embodiment provides a subcutaneous indwelling hemodialysis port, including a fixing seat 1, a puncture septum 2 and a connecting tube 3. The upper side of the fixing seat 1 is integrally formed with a liquid storage shell 4, and the connecting tube 3 is connected to the liquid storage shell 4, and the connecting tube 3 is communicated with the inside of the liquid storage shell 4; the other end of the connecting tube 3 passes through the puncture septum 2, and when in use, the other end of the connecting tube 3 is anastomosed to a vein or an artery; the position where the connecting tube 3 passes through the puncture septum 2 is sealed and bonded with medical glue;

[0042] The puncture septum 2 is fixed to the upper side of the fixing seat 1 by means of an adhesive clamp, and the puncture septum 2 covers the liquid storage shell 4 in a sealed space between the puncture septum 2 and the fixing seat 1;

[0043] After the top opening of the liquid storage shell 4 is fixedly connected to the lower side of the puncture septum 2, the puncture septum 2 and the interior of the liquid storage shell 4 form a sealed liquid storage cavity, which is used to store venous blood or arterial blood;

[0044] The puncture septum 2 comprises an upper diaphragm 201, a middle diaphragm 202 and a lower diaphragm 203 arranged in sequence from top to bottom, and the sides of the middle diaphragm 202 opposite to the upper diaphragm 201 and the lower diaphragm 203 are provided with staggered oblique teeth 204, and the elasticity of the middle diaphragm 202 is greater than that of the upper diaphragm 201 and the lower diaphragm 203; wherein the upper diaphragm 201 and the lower diaphragm 203 are also made of elastic materials, but the elasticity of the upper diaphragm 201 and the lower diaphragm 203 is less than that of the middle diaphragm 202. The septum 202 has elasticity, so when the puncture septum 202 is pressed, the middle septum 202 will produce a large deformation, and the oblique teeth 204 on both sides of the middle septum 202 will have a certain displacement relative to the oblique teeth on the upper septum 201 and the lower septum 203, that is, the oblique teeth 204 on the middle septum 202 will be misaligned with the oblique teeth 204 on the upper septum 201 and the lower septum 203. After dialysis is completed, the puncture needle is pulled out, and the puncture holes on the middle septum, the upper septum and the lower septum are staggered, so that the puncture holes are no longer connected, thereby preventing blood from flowing out.

[0045] like Figure 4-Figure 6 , Figure 8 As shown, a connecting block 5 is fixed to the outer edge of the puncture septum 2, and a sink groove is provided on the inner and outer side walls of the lower end of the connecting block 5, and the adhesive clamp is installed in the sink groove; the connecting block 5 is made of hard medical plastic material;

[0046] The adhesive clamping member includes a hard curved plate 7 and a first elastic connecting member 8 fixed at both ends of the hard curved plate 7, one end of the first elastic connecting member 8 is fixed to the end of the hard curved plate 7, and the other end is fixed to the side bottom wall of the sink. In a natural state, the hard curved plate 7 is located in the sink, and the side of the hard curved plate 7 does not protrude from the sink (that is, the hard curved plate 7 is completely embedded in the sink), and the connecting block 5 is provided with a through hole 14 connected to the outer wall of the sink and the part of the connecting block 5 located outside the fixing seat 1. Fluid is filled into the sink through the through hole 14, the hard curved plate 7 moves to the outside of the sink, and the first elastic connecting member 8 is stretched; although the first elastic connecting member 8 has a tendency to expand outward when the fluid is filled, the first elastic connecting member 8 is arranged close to the upper and lower side walls of the sink, so the first elastic connecting member 8 can only be stretched with the movement of the hard curved plate 7;

[0047] The upper side of the fixing seat 1 is provided with an annular T-shaped groove 9. After the fluid is filled through the through hole 14, the block composed of the hard arc plate 7 and the first elastic connector 8 is clamped at the lower end of the T-shaped groove 9; after the fluid is filled, the hard arc plate 7 moves to the outside of the sink groove, and the hard arc plate 7 gradually leaves the sink groove and is clamped into the lower end of the T-shaped groove 9, and finally the hard arc plate 7 contacts the side wall of the T-shaped groove 9. Finally, the longitudinal section of the lower end of the connecting block 5 is a T-shaped structure, so that the connecting block 5 is clamped in the T-shaped groove 9 through the hard arc plate 7 and the first elastic connector 8;

[0048] A second elastic member 10 is fixed to the outer side of the hard curved plate 7, and the space between the second elastic member 10 and the hard curved plate 7 is filled with glue; a pointed protrusion 11 is provided on the side wall at the lower end of the T-shaped groove 9; in a natural state, the second elastic member 10 also does not protrude from the sink groove (that is, the second elastic member 10 and the hard curved plate 7 are completely embedded in the sink groove); after the fluid is successfully introduced through the through hole 14, when the hard curved plate 7 moves into the T-shaped groove 9, the second elastic member 10 first abuts against the pointed protrusion 11, and finally the second elastic member 10 is punctured, and the glue filled in the second elastic member 10 is released to bond the hard curved plate 7 to the T-shaped groove 9;

[0049] It can be understood that a plug is provided at the fluid inlet of the through hole 14. After the fluid filling operation is completed, the hard arc plate 7 is bonded to the T-slot 9, and the fluid inlet of the through hole 14 is blocked by the plug, thereby preventing the successfully injected fluid from flowing out of the space formed by the hard arc plate 7 and the first elastic connector 8, thereby ensuring that the connecting block 5 is stably clamped in the T-slot 9 by the hard arc plate 7 and the first elastic connector 8.

[0050] like Figure 7 As shown, the lower side of the puncture septum 2 is integrally formed with an annular inverted U-shaped connecting portion 12, and the upper end of the liquid storage shell 4 is fixedly connected to the inverted U-shaped connecting portion 12; the inner side wall of the inverted U-shaped connecting portion 12 is provided with a first clamping portion 1201 inclined upward, and the inner and outer side surfaces of the upper end of the liquid storage shell 4 are provided with a second clamping portion 1202 inclined downward; the first clamping portion 1201 and the second clamping portion 1202 are wedge-shaped structures that are engaged with each other. The reason why the first clamping portion 1201 is set to be inclined upward and the second clamping portion 1202 is inclined downward is to ensure that the liquid storage shell 4 is installed properly. When installing the puncture septum 2, the upper end of the liquid storage shell 4 can be smoothly inserted into the inverted U-shaped connecting portion 12. When the upper end of the liquid storage shell 4 is completely inserted into the inverted U-shaped connecting portion 12, the first clamping portion 1201 and the second clamping portion 1202 are engaged with each other to achieve a fixed connection between the liquid storage shell 4 and the puncture septum 2. In order to ensure the sealing effect between the liquid storage shell 4 and the puncture septum 2, glue can be applied on the surface of the second clamping portion 1202 before the upper end of the liquid storage shell 4 is inserted into the inverted U-shaped connecting portion 12, thereby further ensuring the fixing effect between the liquid storage shell 4 and the puncture septum 2 while also ensuring the sealing effect.

[0051] like Figure 2 and Figure 3As shown, there are two liquid storage shells 4, each of which is connected to one or two connecting tubes 3, and the connecting tubes 3 pass through the outside of the puncture septum 2; the two liquid storage shells 4 are arranged side by side, and the lower side of the lower diaphragm 203 in the puncture septum 2 is provided with an intermediate partition 205, and the lower end of the intermediate partition 205 is also provided with a connecting block 5, and a T-shaped groove 9 corresponding to the position of the intermediate partition 205 is opened on the fixing seat 1. After the puncture septum 2 is installed on the fixing seat 1, the intermediate partition 205 divides the space between the puncture septum 2 and the fixing seat 1 into two spaces, wherein the corresponding liquid storage shell 4 on the fixing seat 1 of one space is a venous blood cavity, and the corresponding liquid storage shell 4 on the fixing seat 1 of the other space is an arterial blood cavity, and the volume (V) of the two liquid storage shells 4 is preferably 0.5≤V≤2ml.

[0052] The fixing seat 1 in the subcutaneous indwelling hemodialysis port provided by the present invention is also provided with a suture hole. When the subcutaneous indwelling hemodialysis port provided by the present invention is buried, the patient's forearm is cut open, and then the fixing seat 1 is sutured to the muscle through the suture hole, and then the connecting tube 3 on the liquid storage shell 4 for storing venous blood is anastomosed to the vein, and the connecting tube 3 on the liquid storage shell 4 for storing arterial blood is anastomosed to the artery;

[0053] If the number of the connecting tube 3 on the liquid storage shell 4 is one, it is not necessary to cut off the blood vessel, and only one incision needs to be made on the blood vessel, and then the connecting tube is sutured to the incision of the blood vessel; in this case, the liquid storage shell 4 is only used as a communication channel between the puncture needle and the blood vessel during the dialysis operation. After the dialysis operation is completed, the other end of the puncture needle can be connected to the syringe, and physiological saline can be filled into the liquid storage shell 4 to inject the residual blood in the liquid storage shell 4 into the blood vessel, so as to avoid the phenomenon of blood clotting caused by too much blood being retained in the liquid storage shell 4;

[0054] If there are two connecting tubes 3 on the liquid storage shell 4, it is necessary to cut off the blood vessel, and then sew the two connecting tubes 3 on the liquid storage shell 4 to the broken ends of the corresponding blood vessels respectively; at this time, the liquid storage shell 4 not only serves as a connecting channel between the puncture needle and the blood vessel during the dialysis operation, but also serves as a part of the passage of the artery or vein itself after the dialysis operation is completed.

[0055] In order to maintain the stability of the overall shape of the subcutaneous hemodialysis port provided by the present invention, after the puncture septum 2 is fixedly connected with the fixing seat 1 and the liquid storage shell 4, a fluid can be injected through the hole on the puncture septum 2 for the connecting tube 3 to pass through, and then the hole is bonded and sealed with medical glue, so that the space outside the puncture septum 2 and the liquid storage shell 4 is filled with fluid, and the fluid provides a certain supporting force for the puncture septum 2. When the dialysis port provided by the present invention is subcutaneously retained, even if it is moved or squeezed accidentally, it will not be deformed.

[0056] The subcutaneous hemodialysis port provided by the present invention is not provided with oblique teeth 204 on the entire side surface of the middle diaphragm 202 opposite to the upper diaphragm 201 and the lower diaphragm 203. Only when in the installed state, the oblique teeth 204 are provided at the puncture septum 2 corresponding to the opening of the liquid storage shell 4, or the area where the oblique teeth 204 are provided on the puncture septum 2 is slightly larger than the area of ​​the top opening of the liquid storage shell 4. In addition, the fluid used in the present invention is physiological saline or sterile air, preferably physiological saline.

[0057] The subcutaneous indwelling hemodialysis port provided by the present invention can replace the traditional hemodialysis fistula. The fixing seat 1, the puncture septum 2 and the liquid storage shell 4 are all made of polymer materials with good biocompatibility, such as silicone or polyurethane, wherein the fixing seat 1 can also be made of titanium alloy material; the connecting tube 3 is made of silicone rubber or TPU with good elasticity; wherein the structural design of the puncture septum 2 adopts oblique teeth 204 to achieve the connection and limitation of the three-layer diaphragm. When performing dialysis operations, a conventional puncture needle can be used, and after the needle is removed, the needle holes on the oblique teeth 204 on both sides of the middle diaphragm 202 will be misaligned with the needle holes on the oblique teeth 204 on the upper diaphragm 201 and the lower diaphragm 203. Combined with the elastic characteristics of the puncture septum 2 itself, no bleeding will occur; there is no need to set an air bag between the upper diaphragm 201 and the lower diaphragm 203 to push the middle diaphragm 202 to move by pressing the air bag to ensure the misalignment of the needle hole after the needle is removed, and the puncture operation is simple. Example

[0058] like Fig. 9 and Fig.10 As shown, the present invention provides a subcutaneous indwelling hemodialysis port assembly, including the subcutaneous indwelling hemodialysis port described in Example 1, and a sterile puncture needle 13, wherein the sterile puncture needle 13 obliquely passes through the puncture septum 2; the sterile puncture needle 13 obliquely passes through the puncture septum 2 and then enters the liquid storage shell 4. In order to avoid the sterile puncture needle 13 being attached to the side of the lower diaphragm 203 when fixing the sterile puncture needle 13 and affecting the blood circulation, a cotton ball can be added to the needle handle of the sterile puncture needle 13 located outside the skin to pad it; and the end of the catheter of the sterile puncture needle 13 can be connected to the dialysis tube of the dialysis device.

[0059] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0060] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0061] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A subcutaneous hemodialysis port, comprising a fixing seat (1), a puncture septum (2) and a connecting tube (3), characterized in that: The upper side of the fixing seat (1) is integrally formed with a liquid storage shell (4), the connecting pipe (3) is connected to the liquid storage shell (4), and the connecting pipe (3) is in communication with the interior of the liquid storage shell (4); the fixing seat (1), the puncture septum (2) and the liquid storage shell (4) are all made of silicone material; The puncture septum (2) is fixed to the upper side of the fixing seat (1) by means of an adhesive clamping piece, and the puncture septum (2) covers the liquid storage shell (4) in a sealed space between the puncture septum (2) and the fixing seat (1), and the space outside the puncture septum (2) and the liquid storage shell (4) is filled with fluid; After the top opening of the liquid storage shell (4) is fixedly connected to the lower side of the puncture septum (2), the puncture septum (2) and the interior of the liquid storage shell (4) form a liquid storage cavity; The puncture septum (2) comprises an upper diaphragm (201), a middle diaphragm (202) and a lower diaphragm (203) arranged in sequence from top to bottom, and the side surfaces of the middle diaphragm (202) opposite to the upper diaphragm (201) and the lower diaphragm (203) are provided with staggered oblique teeth (204), and the elasticity of the middle diaphragm (202) is greater than the elasticity of the upper diaphragm (201) and the lower diaphragm (203); An annular inverted U-shaped connecting portion (12) is integrally formed on the lower side of the puncture septum (2), and the upper end of the liquid storage shell (4) is fixedly connected to the inverted U-shaped connecting portion (12); The inner side wall of the inverted U-shaped connecting portion (12) is provided with an upwardly inclined first clamping portion (1201), and the inner and outer side surfaces of the upper end of the liquid storage shell (4) are provided with downwardly inclined second clamping portions (1202).

2. The subcutaneous hemodialysis port according to claim 1, characterized in that: A connecting block (5) is fixed to the outer edge of the puncture partition (2), and inner and outer side walls of the lower end of the connecting block (5) are provided with recessed grooves, and the adhesive clamping piece is installed in the recessed grooves.

3. The subcutaneous hemodialysis port according to claim 2, characterized in that: The adhesive clamping member comprises a hard arc-shaped plate (7) and first elastic connecting members (8) fixed to both ends of the hard arc-shaped plate (7), and the connecting block (5) is provided with a through hole (14) communicating with the outer wall of the sink and the portion of the connecting block (5) located outside the fixing seat (1).

4. The subcutaneous hemodialysis port according to claim 3, characterized in that: An annular T-shaped groove (9) is provided on the upper side of the fixing seat (1). After the fluid is filled through the through hole (14), a clamping block composed of a hard arc plate (7) and a first elastic connecting member (8) is clamped at the lower end of the T-shaped groove (9).

5. The subcutaneous hemodialysis port according to claim 4, characterized in that: A second elastic member (10) is fixed to the outer side of the hard arc-shaped plate (7), and the space between the second elastic member (10) and the hard arc-shaped plate (7) is filled with glue.

6. The subcutaneous hemodialysis port according to claim 5, characterized in that: A pointed protrusion (11) is provided on the side wall at the lower end of the T-shaped groove (9).

7. The subcutaneous hemodialysis port according to claim 1, characterized in that: The number of the liquid storage shells (4) is two, and each liquid storage shell (4) is connected to one or two connecting tubes (3), and the connecting tubes (3) pass through the outside of the puncture septum (2).

8. A subcutaneous hemodialysis port assembly, characterized in that: It comprises the subcutaneous indwelling hemodialysis port according to any one of claims 1 to 7, and a sterile puncture needle (13), wherein the sterile puncture needle (13) obliquely penetrates the puncture septum (2).

Images