Internal arteriovenous fistula flow limiting band
By designing an arteriovenous fistula flow restriction belt with a controllable ring size, the problem of difficulty in accurately controlling the size of the internal fistula lumen and blood flow in the prior art is solved, and a more controllable and simple surgical flow restriction effect is achieved.
Patent Information
- Application Number
- CN202420534594.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-19
AI Technical Summary
In the prior art, when treating high-flow arteriovenous fistula, it is difficult to accurately control the size of the luminal volume and blood flow of the fistula, resulting in a decrease or insufficient blood flow, affecting the hemodialysis effect and fistula occlusion.
A flow restriction belt of the arteriovenous fistula is designed, and the second end is connected and cooperated with multiple slots of the first end to achieve controllable size of the body ring of the flow restriction belt, and precisely control the lumen size and blood flow of the arteriovenous fistula.
The precise flow restriction of the size and blood flow of the intravenous fistula lumen is achieved, and the surgical process is more controllable and simple, avoiding the problem of insufficient or too little blood flow in traditional methods.
Smart Images
Figure CN222584569U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of medical equipment and relates to an arteriovenous fistula flow limiting belt. Background Art
[0002] For maintenance hemodialysis patients, autogenous arteriovenous fistula (AVF) is the first choice as the hemodialysis vascular access. When the natural blood flow of AVF is ≥1500mL / min and (or) the natural blood flow / cardiac output is ≥20%, it is called a high-flow fistula. High-flow fistula can increase the cardiac load, leading to high-output heart failure, aneurysm formation, stenosis or occlusion of the cephalic venous arch and central vein, endangering the patient's "lifeline". Therefore, how to treat high-flow AVF in a timely and effective manner is particularly important. Clinically, the current method of surgical "flow limitation" for high-flow arteriovenous fistula is to tie the arteriovenous anastomosis with sutures or wrap it with artificial materials to make the lumen smaller and reduce blood flow. However, this flow limitation method has the following disadvantages: First, the blood flow may be reduced due to the small lumen, and normal hemodialysis cannot be maintained or the fistula may be occluded; second, the blood flow may still be large due to insufficient reduction of the lumen, and the expected effect cannot be achieved.
[0003] In order to solve the above problems, a medical device is needed that can accurately control the lumen size of the fistula to control the blood flow. Utility Model Content
[0004] In view of this, the utility model provides an arteriovenous fistula flow limiting band, which makes the size of the ring formed by the flow limiting band body controllable by means of multiple card slots at the second end and the first end, thereby achieving the purpose of accurately controlling the lumen size and blood flow of the arteriovenous fistula, and the overall structure is simple and the manufacturing cost is low.
[0005] The utility model discloses an arteriovenous fistula flow limiting belt, comprising a flow limiting belt body, which is a belt-shaped structure. The flow limiting belt body is provided with a first end and a second end along the length direction. The first end is provided with a card slot, and a plurality of the card slots are provided along the length direction of the flow limiting belt body. The second end can be limitedly plugged and engaged in any of the card slots, so that the flow limiting belt body constitutes a radially closed annular structure.
[0006] Furthermore, the second end is provided with a bayonet, and the bayonet is engaged with the slot so that the second end is limited for the first end.
[0007] Furthermore, the second end is also provided with a fixing belt and a fixing buckle, and the fixing belt and the fixing buckle are arranged along the length direction of the second end and are respectively located on both sides of the bayonet.
[0008] Furthermore, the fixing buckle has an annular buckle, and the fixing belt is connected to the fixing buckle by a penetration and winding method.
[0009] Furthermore, at least two fixing buckles are provided, and the two fixing buckles are respectively and correspondingly provided at two ends in the width direction of the second end.
[0010] Furthermore, the peripheral edges on both sides of the second end head in the width direction are recessed inwards along the width direction to form the bayonet.
[0011] Furthermore, the widths of the first end head and the second end head are equal and greater than the width of the flow-limiting strip body.
[0012] Furthermore, the width of the bayonet is not greater than the width of the slot, and the width of the slot is equal to the width of the flow-limiting belt body.
[0013] Furthermore, the first end and the second end are integrally formed and arranged on the current limiting belt body; the fixing buckle and the fixing belt are integrally formed and arranged on the second end.
[0014] Beneficial effects of the utility model:
[0015] The utility model discloses an arteriovenous fistula flow limiting belt, which makes the size of the ring surrounded by the flow limiting belt body controllable and adjustable by means of a plurality of card slots of the second end and the first end, which makes the flow limiting surgery for the lumen size and blood flow of the venous fistula more controllable and accurate. The fixing belt is provided with a winding fixing buckle, so that the connection between the first end and the second end is more firm and reliable, and the first end and the second end can be further connected without suturing, which simplifies the surgical steps; the flow limiting belt of the utility model has a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is an axonometric view of configuration 1 of the embodiment of the utility model;
[0017] Figure 2 This is a schematic diagram of the main structure of configuration 1 of an embodiment of the utility model;
[0018] Figure 3 for Figure 2 A partial enlarged view of the middle A;
[0019] Figure 4 This is a schematic diagram of the installation of the fixing rope of the first embodiment of the utility model;
[0020] Figure 5 It is an axonometric view of configuration 2 of the embodiment of the utility model;
[0021] Figure 6This is a schematic diagram of the main structure of configuration 2 of an embodiment of the utility model. DETAILED DESCRIPTION
[0022] It should be noted that, in the description of this specification, the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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.
[0023] As shown in the figure, the utility model discloses an arteriovenous fistula flow limiting belt, including a flow limiting belt body 1, the flow limiting belt body 1 is a belt structure, the flow limiting belt body 1 is provided with a first end 2 and a second end 3 along the length direction, the first end 2 is provided with a card slot 4, the card slot 4 is provided with a plurality of cards along the length direction of the flow limiting belt body 1, and the second end 3 can be limitedly plugged and engaged in any of the card slots 4, so that the flow limiting belt body 1 constitutes a radially closed ring structure. As shown in the figure, the first end 2 and the second end 3 are respectively located at the two ends of the length direction of the flow limiting belt body 1, and the card slots 4 are provided in plurality, and are uniformly provided in the first end 2 along the length direction of the flow limiting belt body 1. The second end 3 is inserted into any card slot 4, and a radially closed ring is formed. Inserting into different card slots 4 will form rings with different diameters, that is, different flow limiting sizes are formed; the flow limiting belt body 1 is sheathed on the outside of the arteriovenous fistula, and the purpose of limiting the lumen size and blood flow of the target venous fistula is achieved by forming rings of different diameters. The position of the slot 4 is fixed, so the limiting size formed after being inserted into each slot 4 is also fixed. Therefore, during the operation, it is only necessary to insert the second end 3 into the corresponding slot 4 to form the required current limiting size. Compared with the current limiting method of wrapping and suturing with artificial materials, the current limiting formed by using the utility model is more accurate and the surgical method is simpler.
[0024] In this embodiment, the second terminal 3 is provided with a bayonet 6, and the bayonet 6 is engaged with the slot 4 so that the second terminal 3 is limited for the first terminal 2. The bayonet 6 is provided to achieve the clamping and limiting of the second terminal 3 on the first terminal 2, and also facilitate the operation. After the second terminal 3 is inserted into the slot 4, the second terminal 3 is pulled until the bayonet 6 is engaged with the slot 4, and the limiting is completed. The operation is convenient, and the formed limiting size is more standardized.
[0025] In this embodiment, the second end 3 is also provided with a fixing belt 5 and a fixing buckle 7, which are arranged along the length direction of the second end 3 and are respectively located on both sides of the bayonet 6. In this embodiment, the fixing buckle 7 has an annular buckle 8, and the fixing belt 5 is connected to the fixing buckle 7 by a penetration and winding method. As shown in the figure, the setting of the fixing belt 5 and the fixing buckle 7 is to prevent the second end 3 from slipping out of the first end 2. The connection between the fixing belt 5 and the fixing buckle 7 is achieved by passing the fixing belt 5 through the buckle 8 of the fixing buckle 7, and then wrapping around the fixing buckle 7 for several turns, and then fixing it by tying a knot. The buckle 8 is set to facilitate the insertion of the fixing belt 5; the fixing belt 5 and the fixing buckle 7 are set at both ends to ensure that after the two are connected, the second end 3 will not slip out of the first end 2, ensuring the reliability of the connection and preventing current limiting failure.
[0026] In this embodiment, at least two fixing buckles 7 are provided, and the two fixing buckles 7 are respectively and correspondingly provided at the two ends of the width direction of the second end 3. As shown in the figure, there are two fixing buckles 7 in this embodiment, and the two fixing buckles 7 are symmetrically provided in the width direction. The number of fixing belts 5 can be provided according to actual needs. This embodiment discloses two structures of configuration one and configuration two. Configuration one provides two symmetrical fixing belts 5, and configuration two provides one fixing belt 5; in configuration one, there are multiple ways to fix the fixing belt 5 and the fixing buckle 7. The two fixing belts 5 can be cross-passed through the two fixing buckles 7 and wrapped around, and then the two fixing belts 5 are knotted with each other to achieve fixation; the two fixing belts 5 can also be passed through the fixing buckles 7 on the same side and wrapped around, and then the two fixing belts 5 are knotted on themselves, or any combination of the aforementioned threading methods and knotting methods; in configuration one, a fixing belt 5 passes through the two fixing buckles 7 in sequence and is wrapped around, and then a knot is tied on the fixing belt 5 itself to achieve fixation. In this embodiment, Figure 4 What is shown is a structural schematic diagram of two cross-threaded fixing belts 5 of configuration one, which only shows the threading method, and does not show the details of the subsequent winding and knotting. However, the winding and knotting of the rope structure on the ring-shaped object can be understood by technicians in this technical field, so it is not shown and will not be repeated here.
[0027] In this embodiment, the two side peripheries of the second terminal 3 in the width direction are recessed inwardly along the width direction to form the bayonet 6. As shown in the figure, the two peripheries of the second terminal 3 in the width direction are recessed to form two triangular buckles, and the triangular buckles are more accurately engaged.
[0028] In this embodiment, the widths of the first end head 2 and the second end head 3 are equal and greater than the width of the current limiting strip body 1, so as to ensure that after the first end head 2 and the second end head 3 are connected, they can completely cover the current limiting strip body 1 to ensure the current limiting effect.
[0029] In this embodiment, the width of the bayonet 6 is not greater than the width of the slot 4, and the width of the slot 4 is equal to the width of the current limiting belt body 1. Since it needs to be implanted in the human body, if the bayonet 6 is wider than the slot 4, the connection position after the snap connection is uneven, so the width of the bayonet 6 is not greater than the width of the slot 4, and it is better to have the same width. The width of the slot 4 is equal to the width of the current limiting belt body 1 to ensure the integrity of the annular structure formed after the snap connection and ensure the current limiting effect.
[0030] In this embodiment, the first end 2 and the second end 3 are integrally formed and arranged on the flow-limiting belt body 1; the fixing buckle 7 and the fixing belt 5 are integrally formed and arranged on the second end 3. In this embodiment, the first end 2, the second end 3, the flow-limiting belt body 1, the fixing buckle 7 and the fixing belt 5 can be made of medical materials such as expanded polytetrafluoroethylene, or other biodegradable materials that are made of flexible materials that are elastic and not prone to immune rejection reactions. They can remain in the human body after implantation, or degrade by themselves to avoid secondary surgery; the fixing belt 5 in this embodiment is a belt-like structure, and can also be designed as a rope-like structure. This is understandable to technicians in this technical field and will not be repeated here.
[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. An arteriovenous fistula flow limiting band, characterized in that: It includes a flow limiting belt body, which is a belt-shaped structure. The flow limiting belt body is provided with a first end and a second end along the length direction. The first end is provided with a slot, and a plurality of slots are provided along the length direction of the flow limiting belt body. The second end can be limitedly inserted and engaged in any of the slots, so that the flow limiting belt body constitutes a radially closed annular structure.
2. The arteriovenous fistula flow limiting band according to claim 1, characterized in that: The second end is provided with a bayonet, and the bayonet is engaged with the slot so that the second end is limited for the first end.
3. The arteriovenous fistula flow limiting band according to claim 2, characterized in that: The second end is also provided with a fixing belt and a fixing buckle, and the fixing belt and the fixing buckle are arranged along the length direction of the second end and are respectively located on both sides of the bayonet.
4. The arteriovenous fistula flow limiting band according to claim 3, characterized in that: The fixing buckle has an annular buckle ring, and the fixing belt is connected to the fixing buckle by a penetration and winding method.
5. The arteriovenous fistula flow limiting band according to claim 3, characterized in that: At least two fixing buckles are provided, and the two fixing buckles are respectively and correspondingly arranged at two ends of the second end in the width direction.
6. The arteriovenous fistula flow limiting band according to claim 2, characterized in that: The peripheral edges on both sides of the second end head in the width direction are recessed inwards along the width direction to form the bayonet.
7. The arteriovenous fistula flow limiting band according to claim 6, characterized in that: The widths of the first end and the second end are equal and greater than the width of the flow limiting strip body.
8. The arteriovenous fistula flow limiting band according to claim 2, characterized in that: The width of the bayonet is not greater than the width of the slot, and the width of the slot is equal to the width of the current limiting belt body.
9. The arteriovenous fistula flow limiting band according to claim 3, characterized in that: The first end and the second end are integrally formed and arranged on the current limiting belt body; the fixing buckle and the fixing belt are integrally formed and arranged on the second end.