Disposable tube core for closed hemodiafiltration catheter
By designing a disposable die for hemodialysis catheter, the problem of the formation of thrombosis and anticoagulant drugs affecting the coagulation function after a long period of indwelling is solved, and the safe sealing and sterile state of the catheter is achieved, reducing the Patient risk.
Patent Information
- Application Number
- CN202420420564.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-03-05
AI Technical Summary
During hemodialysis, the hemodialysis catheter is prone to form deposits and thrombosis after a long period of indwelling, leading to the risk of embolization, and the use of anticoagulant drugs to close the catheter may affect the patient's coagulation function and even lead to bleeding events.
A disposable die is designed to seal the venous branch tube and arterial branch tube through the shape of the die and the design of the connecting cap, fix it in the catheter to avoid blood entering, and ensure sterility through elastic layers and seals, reducing Risk of infection.
It effectively avoids the formation of blood clots in the catheter, reduces the risk of thrombosis falling off and entering the blood circulation, and prevents anticoagulant drugs from entering the circulation, reducing the occurrence of bleeding events.
Smart Images
Figure CN222130676U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a disposable tube core for a closed hemodiafiltration catheter. Background Art
[0002] Hemodialysis is a long-term treatment process for patients, which needs to be repeated regularly every week. Therefore, in order to avoid repeated catheterization, the hemodialysis tube is placed in the patient's blood vessels for a relatively long time.
[0003] At present, temporary or long-term venous catheters used in clinical hemodialysis and hemofiltration (CRRT) are double-lumen tubes, divided into an arterial end and a venous end, which respectively draw blood out of / return the body during dialysis or hemofiltration. During the dialysis / hemofiltration interval, the catheter needs to be sealed with an anticoagulant solution. During the long-term retention process, the human body has the characteristics of actively rejecting foreign bodies and forming deposits on the surface of foreign bodies, and blood enters the inside, resulting in rapid formation of deposits on the surface of foreign bodies in the blood vessels, and then forming embolism inside the hemodialysis catheter during the catheterization period after dialysis treatment, so there is a risk of thrombus detachment and entering the patient's blood circulation.
[0004] In addition, if anticoagulants, such as heparin, thrombin inhibitors, etc., are injected into the catheter after hemodialysis treatment and then the catheter is closed, the anticoagulants may enter the circulation and affect the patient's coagulation function, and in severe cases may cause bleeding events.
[0005] In view of the above problems, the utility model provides a disposable tube core for a closed hemodiafiltration catheter. Utility Model Content
[0006] In order to overcome the problems raised in the background technology, the utility model adopts the following technical solutions:
[0007] A disposable tube core for closing a hemodiafiltration catheter, used for closing a venous branch or an arterial branch of a hemodiafiltration catheter; it comprises:
[0008] The core has a proximal end and a distal end, wherein the core is shaped to be able to connect the venous branch
[0009] / Arterial branch occlusion;
[0010] A first connecting cap, disposed at the proximal end of the tube core;
[0011] A second connecting cap, used to connect to the venous branch tube / arterial branch tube, wherein the first connecting cap and the second connecting cap are detachably connected;
[0012] A protective sleeve, one end of which is connected to the lower edge of the first connecting cap, and the other end of which is connected to the upper edge of the second connecting cap, the tube core is located in the protective sleeve, wherein the distal end of the tube core can pass through the second connecting cap into the venous branch / arterial branch, so that the first connecting cap approaches the second connecting cap and forms a connection relationship.
[0013] In some embodiments of the present application, the first connecting cap has a bottom end surface, and the second connecting cap has a top end surface, wherein the bottom end surface of the first connecting cap is provided with a hook, and the top end surface of the second connecting cap is formed with a slot, and after the first connecting cap moves toward the second connecting cap, the hook can be inserted into the slot.
[0014] Furthermore, at least two of the hooks are provided, wherein the number of the card slots is the same as the number of the hooks.
[0015] In some embodiments of the present application, the second connecting cap further comprises: an elastic layer, wherein the elastic layer is provided with a through hole, and the distal end of the tube core passes through the second connecting cap through the through hole.
[0016] Furthermore, the elastic layer is made of one of rubber, silicone, PVC and EVC materials, so that the diameter of the through hole varies with the diameter of the tube core.
[0017] Furthermore, the second connecting cap has a cavity, and a sealing member is detachably arranged in the cavity, wherein the sealing member can completely fill the cavity.
[0018] In some embodiments of the present application, the protective cover is made of a flexible material, wherein when the first connecting cap moves toward the second connecting cap, the protective cover is stacked between the first connecting cap and the second connecting cap.
[0019] In some embodiments of the present application, the tube core has different specifications, wherein the tube core includes: a venous tube core and an arterial tube core.
[0020] Further, the distal end of the venous tube core is configured as a pointed end, and the shape of the venous tube core is configured to be able to completely fill the venous branch of the hemodiafiltration catheter.
[0021] Furthermore, the shape of the arterial core is configured to completely fill the arterial branch of the hemodiafiltration catheter.
[0022] Beneficial effects of the utility model:
[0023] 1. After the catheter is placed for the patient or after the hemofiltration / dialysis is completed, the doctor pushes the tube core into the venous branch / arterial branch of the hemodialysis / filtration catheter, so that the venous branch / arterial branch is blocked, thereby preventing blood from entering the arterial branch and venous branch without hemodialysis / filtration; thereby preventing blood from forming thrombi in the arterial branch and venous branch;
[0024] 2. By providing the first connecting cap and the second connecting cap, the position of the tube core is fixed after being inserted into the venous branch / arterial branch, thereby preventing the tube core from being pushed out of the venous branch / arterial branch under the action of blood pressure.
[0025] 3. By setting a protective cover, the tube core is always in a sterile state, thereby reducing the chance of infection in patients during use. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0027] Figure 2 This is a schematic diagram of the structure of the tube core in the protective cover of the utility model;
[0028] Figure 3 This is a schematic diagram of the tube core of the utility model;
[0029] Figure 4 This is a schematic diagram of the first connecting cap and the second connecting cap of the utility model after being combined;
[0030] Figure 5 This is a schematic diagram of the position of the protective cover of the utility model;
[0031] Figure 6 This is a schematic diagram of the internal structure after the first connecting cap and the second connecting cap of the utility model are combined;
[0032] Figure 7 This is a schematic diagram of the utility model in a state where the first connecting cap and the second connecting cap are connected;
[0033] Figure 8 This is a schematic diagram of the internal structure of the second connecting cap of the utility model;
[0034] Fig. 9 This is a schematic diagram of the structure of the outer packaging sleeve of the utility model;
[0035] Fig.10 This is a schematic diagram of the internal structure of the outer packaging sleeve of the utility model;
[0036] Fig.11 This is a schematic diagram of the structure of the tube core being placed in a catheter of the utility model;
[0037] Fig.12This is a schematic diagram of the state when the second connecting cap of the utility model is connected to the arterial branch tube;
[0038] Fig.13 This is a schematic diagram of the structure of the utility model after the venous branch and the arterial branch are sealed;
[0039] In the figure, 1, tube core; 11, proximal end; 12, distal end; 13, first connecting cap; 131, hook; 14, second connecting cap; 141, slot; 142, arc-shaped protrusion; 143, cavity; 145, elastic layer; 1451, through hole; 15, protective cover; 16, seal; 17, outer packaging cover; 18, catheter; 181, venous branch; 182, arterial branch. DETAILED DESCRIPTION
[0040] The technical solutions in the embodiments of the utility model are clearly and completely described below through specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Those skilled in the art can easily understand other advantages and functions of the utility model from the contents disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation methods. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0041] Figure 1 —3 and Fig.11 The main technical content of this embodiment is shown. This specific embodiment provides a disposable tube core for a closed hemodiafiltration catheter, which includes:
[0042] The tube core 1 has a proximal end 11 and a distal end 12, wherein the shape of the tube core 1 is configured to be able to close the venous branch 181 / arterial branch 182;
[0043] A first connection cap 13 is disposed at the proximal end 11 of the tube core 1;
[0044] The second connecting cap 14 is used to connect with the venous branch 181 / arterial branch 182, wherein the first connecting cap 13 and the second connecting cap 14 are detachably connected;
[0045] The protective sleeve 15 has one end connected to the lower edge of the first connecting cap 13, and the other end connected to the upper edge of the second connecting cap 14. The tube core 1 is located in the protective sleeve 15, wherein the distal end 12 of the tube core 1 can pass through the second connecting cap 14 and enter into the venous branch 181 / arterial branch 182, so that the first connecting cap 13 approaches the second connecting cap 14 and forms a connection relationship.
[0046] When in use, first use sterile saline to fill the arterial branch 182 and the venous branch 181, and then use the catheter 18 clamp to respectively close the arterial branch 182 and the venous branch 181 of the hemodialysis / filtration catheter 18, connect the second connecting cap 14 to the arterial branch 182 / venous branch 181 of the hemodialysis / filtration catheter 18, and the doctor pushes the tube core 1 so that the distal end 12 of the tube core 1 enters the venous branch 181 / arterial branch 182 of the hemodialysis / filtration catheter 18 after passing through the second connecting cap 14, open the catheter 18 clamp, and continue to push it into the venous branch 181 / arterial branch 182 until the blood return hole of the venous branch 181 / the blood inlet hole of the arterial branch 182 is closed; then connect the first connecting cap 13 to the second connection to fix the tube core 1.
[0047] refer to Figure 2 —4 and Fig.11 —13, as can be understood by those skilled in the art, there is a distance difference between the blood inlet hole of the arterial branch 182 of the hemodialysis / filtration catheter 18 and the blood return hole of the venous branch 181, and the venous branch 181 also has a tip hole; based on this, in this embodiment, different specifications are set so that when in use, the arterial branch 182 and the venous branch 181 are closed separately according to needs; specifically, the tube core 1 includes: a venous tube core 1 and an arterial tube core 1; wherein the distal end 12 of the venous tube core 1 is configured as a tip, specifically presenting a cone , wherein the tapered distal end 12 is based on the axial extension direction of the venous tube core 1, and its diameter gradually decreases in the direction away from the proximal end 11; when in use, the tapered distal end 12 passes through the second connecting cap 14 and enters into the venous branch 181; and the tip hole of the venous branch 181 is closed by the tapered distal end 12, and the blood return hole is closed by the outer wall of the venous tube core 1; thereby, when the hemodialysis / filtration catheter 18 remains in the patient's body, blood will not enter into the venous branch 181.
[0048] More specifically, the distal end 12 of the arterial tube core 1 is configured as a flat end. When in use, the distal end 12 of the arterial tube core 1 passes through the second connecting cap 14 and enters into the arterial branch 182 until it rests against the end of the arterial branch 182. The blood inlet hole is closed by the outer wall of the arterial tube core 1 to prevent blood from entering into the arterial branch 182. When in use, the venous tube core 1 and the arterial tube core 1 are respectively inserted into the venous branch 181 and the arterial branch 182 of the hemodialysis / filtration catheter 18. This prevents blood from entering into the arterial branch 182 and the venous branch 181 while the hemodialysis / filtration catheter 18 remains in the patient's body. This prevents blood from forming thrombi in the arterial branch 182 and the venous branch 181.
[0049] Preferably, the venous tube core 1 can completely fill the venous branch 181 , and the arterial tube core 1 can completely fill the arterial branch 182 .
[0050] refer to Figure 2 and Figure 4 —6. In the present embodiment, the first connecting cap 13 and the second connecting cap 14 are connected by a threaded connection, a clamping connection, or a snap-fit connection. Specifically, the first connecting cap 13 has a bottom end face, and the second connecting cap 14 has a top end face, and the bottom end face and the top end face are opposite to each other, wherein, in the clamping connection, the bottom end face of the first connecting cap 13 is provided with a hook 131, and the top end face of the second connecting cap 14 is provided with a slot. After the first connecting cap 13 moves toward the second connecting cap 14, the hook 131 can be inserted into the slot. In this way, the first connecting cap 13 and the second connecting cap 14 are connected. In addition, the tube core 1 is fixed in the venous branch 181 / arterial branch 182 to prevent the tube core 1 from being pushed out of the venous branch 181 / arterial branch 182 under the action of blood pressure.
[0051] refer to Figure 6 —8. More specifically, at least two hooks 131 are provided, wherein the number of the slots is the same as the number of the hooks 131; as a specific example, an arc-shaped protrusion is provided along the inner wall of the slot, and after the hook 131 enters the slot, it hooks on one side of the arc-shaped protrusion, thereby forming a connection relationship between the first connecting cap 13 and the second connecting cap 14; as a preferred embodiment, after the first connecting cap 13 and the second connecting cap 14 are connected, there is a distance between the bottom end face of the first connecting cap 13 and the top end face of the second connecting cap 14.
[0052] More specifically, the hook 131 can be made of plastic material, so that when the hook 131 enters the slot, it can be deflected toward the axial direction of the first connecting cap 13 under the action of the arc-shaped protrusion, and then enter the slot and form a connection relationship with the arc-shaped protrusion; as a specific example, the material of the hook 131 can be: one of polyvinyl chloride, polyethylene, and polycarbonate; disconnect the second connecting cap 14 from the venous branch 181 / arterial branch 182, and remove the tube core 1 from the venous branch 181 / arterial branch 182 through the doctor's operation, and then connect the venous branch 181 / arterial branch 182 to the external hemodialysis / filtration instrument.
[0053] refer to Figure 4 and Figure 7—8. In the present embodiment, the second connecting cap 14 further comprises: an elastic layer 145, wherein the elastic layer 145 is provided with a through hole 1451, and the distal end 12 of the tube core 1 passes through the second connecting cap 14 through the through hole 1451. More specifically, the elastic layer 145 is made of one of rubber, silicone, PVC, and EVC materials; so that the diameter of the through hole 1451 varies with the diameter of the tube core 1; when in use, force is applied to the tube core 1 so that the tube core 1 gradually passes through the through hole 1451 of the second connecting cap 14; wherein, under the elastic layer 145 made of elastic material, the inner wall of the through hole 1451 always keeps in contact with the outer wall of the tube core 1, so as to further close the venous branch / arterial branch and avoid the formation of a gap between the tube core 1 and the inner wall of the through hole 1451.
[0054] refer to Figure 6 —8. In the present embodiment, the second connecting cap 14 has a cavity 143, wherein the inner wall of the cavity 143 is provided with threads, so that the second connecting cap 14 can be threadedly connected to the external end of the venous branch 181 / arterial branch 182; more specifically, a seal 16 is detachably provided in the cavity 143 to close the cavity 143 so as to keep the cavity 143 of the second connecting cap 14 in a sterile state.
[0055] More specifically, the seal 16 is inserted into the cavity 143; wherein the seal 16 is in the shape of a cylinder with one end being closed; before use, the seal 16 is taken out of the cavity 143, and then the second connecting cap 14 is screwed onto the end of the venous branch 181 / arterial branch 182 located outside the human body.
[0056] refer to Figure 1 and Figure 5 In this embodiment, the protective cover 15 is made of a flexible material, wherein when the first connecting cap 13 moves toward the second connecting cap 14, the protective cover 15 is stacked between the first connecting cap 13 and the second connecting cap 14; more specifically, the protective cover 15 is made of one of polypropylene, rubber, and silicone, wherein the protective cover 15 is pre-sterilized so that the tube core 1 is always in a sterile state, thereby reducing the chance of infection of the patient during use.
[0057] refer to Fig. 9—11. In the present embodiment, an outer packaging sleeve 17 is further provided, wherein a combination formed by the tube core 1, the first connecting cap 13, the second connecting cap 14 and the protective sleeve 15 is loaded in the outer packaging sleeve 17; when in use, the combination is taken out of the outer packaging sleeve 17; after the patient completes catheterization or blood filtration / dialysis, the doctor inserts the combination into the venous branch 181 / arterial branch 182 to avoid blood from forming a thrombus on the inner wall of the catheter 18, thereby avoiding the risk of thrombus falling off and entering the blood circulation, and avoiding bleeding events after the use of anticoagulants.
[0058] The use of the utility model:
[0059] 1. After completing the patient's hemodialysis / filtration, first fill the arterial and venous branches of the catheter with sterile saline, and then clamp the external ends of the arterial and venous branches with catheter clamps;
[0060] 2. Take out the combination of the tube core, the first connecting cap, the second connecting cap and the protective cover from the outer packaging cover, remove the seal from the cavity of the second connecting cap, and then screw the second connecting cap onto the end of the venous branch or the arterial branch outside the human body;
[0061] 3. The doctor pushes the tube core into the venous branch or arterial branch. After the tube core partially enters the venous branch or arterial branch, the catheter clamp is removed, and then the tube core is completely pushed into the venous branch or arterial branch. At this time, the first connecting cap and the second connecting cap form a connection relationship so that the tube core is fixed, thereby completing the sealing operation of the venous branch or arterial branch.
[0062] The above-mentioned embodiments are only used to understand the present invention. It should be noted that, for those skilled in the art, several improvements can be made to the present invention without departing from the principle of the present invention, and these improvements will also fall within the scope of protection of the claims of the present invention.
Claims
1. A disposable tube core for closing a hemodiafiltration catheter, which is used to close the venous branch / arterial branch of the hemodiafiltration catheter; characterized in that: A tube core having a proximal end and a distal end, wherein the tube core is shaped to be able to seal the venous branch / arterial branch; A first connecting cap, disposed at the proximal end of the tube core; A second connecting cap, used to connect to the venous branch tube / arterial branch tube, wherein the first connecting cap and the second connecting cap are detachably connected; A protective sleeve, one end of which is connected to the lower edge of the first connecting cap, and the other end of which is connected to the upper edge of the second connecting cap, the tube core is located in the protective sleeve, wherein the distal end of the tube core can pass through the second connecting cap into the venous branch / arterial branch, so that the first connecting cap approaches the second connecting cap and forms a connection relationship.
2. The disposable tube core for closed hemodiafiltration catheter according to claim 1, characterized in that: The first connecting cap has a bottom end face, and the second connecting cap has a top end face, wherein the bottom end face of the first connecting cap is provided with a hook, and the top end face of the second connecting cap is formed with a slot, and after the first connecting cap moves toward the second connecting cap, the hook can be inserted into the slot.
3. The disposable tube core for closed hemodiafiltration catheter according to claim 2, characterized in that: At least two of the hooks are provided, wherein the number of the card slots is the same as the number of the hooks.
4. The disposable tube core for closed hemodiafiltration catheter according to claim 1, characterized in that: The second connection cap further comprises: an elastic layer, wherein the elastic layer is provided with a through hole, and the distal end of the tube core passes through the second connection cap through the through hole.
5. The disposable tube core for closed hemodiafiltration catheter according to claim 4, characterized in that: The elastic layer is made of one of rubber, silica gel, PVC and EVC materials, so that the diameter of the through hole varies with the diameter of the tube core.
6. The disposable tube core for closed hemodiafiltration catheter according to claim 1, characterized in that: The second connecting cap has a cavity, and a sealing member is detachably disposed in the cavity, wherein the sealing member can completely fill the cavity.
7. The disposable tube core for closed hemodiafiltration catheter according to claim 1, characterized in that: The protective cover is made of a flexible material, wherein when the first connecting cap moves toward the second connecting cap, the protective cover is stacked between the first connecting cap and the second connecting cap.
8. The disposable tube core for closed hemodiafiltration catheter according to claim 1, characterized in that: The tube cores have different specifications, wherein the tube cores include: a venous tube core and an arterial tube core.
9. The disposable tube core for closed hemodiafiltration catheter according to claim 8, characterized in that: The distal end of the venous stylet is configured as a pointed tip, and the shape of the venous stylet is configured to completely fill the venous branch of the hemodiafiltration catheter.
10. The disposable tube core for closed hemodiafiltration catheter according to claim 8, characterized in that: The shape of the arterial stylet is configured to completely fill the arterial branch of the hemodiafiltration catheter.