Auxiliary vascular shaping supporting and flow limiting device

Abstract

The utility model relates to the technical field of blood vessel forming equipment, and provides an auxiliary blood vessel shaping supporting and flow limiting device which comprises a main body, the main body is provided with a plurality of supporting sections connected in sequence, the supporting sections are cylindrical, and the diameters of the supporting sections change in sequence. According to the technical scheme, the problem that in the prior art, stable and accurate size regulation and control are difficult to guarantee in the blood vessel repairing, shaping and suturing or flow limiting process is solved.

Description

Technical Field

[0001] This utility model relates to the field of angiography equipment technology, specifically to an auxiliary angiography support and flow limiting device. Background Technology

[0002] Autogenous arteriovenous fistula (AVF) is the preferred long-term vascular access for hemodialysis patients. In the field of AVF vascular access technology for hemodialysis patients, good vascular access is key to ensuring long-term successful hemodialysis. High flow rate in AVF generally refers to a fistula blood flow rate >1500 ml / min, or a fistula blood flow to cardiac output ratio greater than 0.2. High flow rate AVFs may carry the risk of heart failure and limb ischemia. Moreover, under the influence of high flow rate, the fistula vessel may further develop, becoming larger and longer, and the vessel may become tortuous. The enlarged vessel may further increase blood flow. These complications can seriously affect the function of the artificial arteriovenous fistula, directly impacting the patient's quality of life and survival rate. The Miller method is a method of flow control that reduces the diameter of the outflow venous tract near the anastomosis and increases vascular resistance. Existing technology uses non-stretchable sutures to loop and narrow the veins around the anastomosis, which is a simple and commonly used operation method. In arteriovenous fistula-related access surgery, techniques such as vascular anatomy, exposure, separation, anastomosis, and reconstruction are essential. Current techniques rely on the surgeon's suturing skills to control the post-suture morphology of the arteries and blood vessels, which has significant limitations and faces challenges in achieving consistency and long-term reliability. Utility Model Content

[0003] This invention proposes an auxiliary vascular shaping support and flow limiting device, which solves the problem of difficulty in ensuring stable and precise size control during vascular repair, shaping, suturing, or flow limiting in related technologies.

[0004] The technical solution of this utility model is as follows:

[0005] An auxiliary vascular shaping support and flow restriction device, comprising:

[0006] The main body has several sequentially connected support segments, each support segment being cylindrical, and the diameter of each support segment changing sequentially.

[0007] As a further technical solution, the main body has a head and a tail, which are located at opposite ends of the main body, and the head is ellipsoidal.

[0008] As a further technical solution, the main body also has a transition section, the two ends of which are respectively connected to two adjacent support sections.

[0009] As a further technical solution, the outer wall of the transition section is a conical surface.

[0010] As a further technical solution, the support section is cylindrical.

[0011] As a further technical solution, the diameters at both ends of the transition section are equal to the diameters of the two adjacent support sections.

[0012] As a further technical solution, the main body is a telescopic body, the support segment has an insertion groove, and the support segment is slidably inserted into the insertion groove of another adjacent support segment.

[0013] As a further technical solution, the transition section is disposed on one end of each support section near the head.

[0014] As a further technical solution, the support section also has a graduated groove.

[0015] As a further technical solution, the diameter difference between two adjacent support segments is 0.1~1mm.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] In this invention, the main body integrates continuous support segments, each segment being a cylindrical design that mimics the natural structure of blood vessels to conform to the vessel wall, reduce foreign body reactions, and improve biocompatibility. The diameter of the support segment gradually changes from one end to the other, precisely matching the vessel diameter according to the needs of vascular ligation or suturing, achieving flow restriction, and ensuring optimized hemodynamics. In high-flow-limiting vascular ligation procedures for autogenous arteriovenous fistulas, this device is placed at the required ligation and flow restriction position, and the vessel is ligated externally with non-absorbable sutures to reduce the vessel's inner diameter, thereby minimizing damage and controlling blood flow. It is simple to operate, has low consumable costs, significantly reduces medical expenses, and alleviates the economic burden on patients. This device is widely applicable to vascular surgical procedures, especially in arteriovenous fistula repair, providing precise diameter control, optimizing blood flow pathways, assisting in vessel shaping, increasing surgical speed, protecting vessels, preventing vessel damage, and improving the success rate of vascular anastomosis. Through precise diameter variation design of the main body and support segment, this device provides better shaping effects for techniques such as vascular anatomy, exposure, anastomosis, and reconstruction in arteriovenous fistula-related procedures, and also demonstrates its application potential in improving surgical precision and optimizing vascular treatment outcomes. Attached Figure Description

[0018] The preferred embodiments will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a support segment in this utility model;

[0021] In the diagram: Main body-1, Support section-101, Head-102, Tail-103, Transition section-104, Insertion slot-105, Scale slot-106. Detailed Implementation

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0023] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0024] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0025] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Reference Figure 1~Figure 2 This is the first embodiment of the present invention, which proposes an auxiliary vascular shaping support and flow limiting device, including a main body 1. The main body 1 has a plurality of sequentially connected support segments 101. The support segments 101 are cylindrical and the diameter of the support segments 101 varies sequentially.

[0027] This embodiment aims to optimize the external vascular flow restriction procedure, ensuring intraoperative and postoperative blood flow stability and vascular structure reliability. The main body 1 integrates continuous support segments 101, each segment being cylindrical to mimic the natural structure of a blood vessel, conforming to the vessel wall, reducing foreign body reaction, and improving biocompatibility. The diameter of the support segment 101 gradually changes from one end to the other, precisely matching the vessel diameter according to the needs of vascular ligation or suturing, achieving external flow restriction in high-flow arteriovenous fistulas and ensuring optimized hemodynamics. The specific operation method is as follows: a support segment 101 of this device is placed close to the side of the blood vessel. At this point, the diameter after ligation minus the thickness of the vessel wall is the diameter of the support segment 101, which is also the diameter of the internal vascular passage. Then, non-absorbable sutures are used to simultaneously and tightly ligate the blood vessel and the device, reducing the inner diameter of the vessel. After removing the device, arterial blood flow is measured using ultrasound. The outer diameter of the vessel can be adjusted according to different diameters to control blood flow. In arteriovenous fistula-related procedures, precise diameter control is provided for techniques such as vascular anatomy, exposure, anastomosis, and reconstruction, resulting in better shaping effects. This embodiment, through the precise diameter variation design of the main body 1 and the support segment 101, not only accommodates diameter reduction during vascular ligation but also demonstrates the application potential of vascular surgery auxiliary devices in improving surgical precision and optimizing vascular treatment outcomes.

[0028] Furthermore, the main body 1 has a head 102 and a tail 103, which are located at the two ends of the main body 1, respectively. The head 102 is ellipsoidal.

[0029] In this embodiment, the main body 1 has a head 102 and a tail 103 at its two ends, clearly distinguishable and enhancing the ease of operation of the device. In particular, the head 102 is designed as an ellipse or ellipsoid. The innovation of this design lies in providing a larger contact surface, adapting to changes in vascular curvature, reducing local pressure concentration on the vessel wall, improving stability, increasing sealing, preventing blood flow disturbance, and optimizing the risk of thrombosis. The spherical design of the tail facilitates positioning outside the blood vessel, especially on complex anatomical surfaces such as bends or large vessels. The elliptical head 102 slides smoothly, reducing friction and making the placement and use of the device smoother. The tail 103 assists in operation, ensuring positioning. The entire device is stable outside the blood vessel, improving surgical precision. This embodiment, through the spherical design of the head 102, not only improves the flexibility and accuracy of external flow restriction but also optimizes intravascular hemodynamics, reducing postoperative complications.

[0030] Furthermore, the main body 1 also has a transition section 104, the two ends of which are connected to two adjacent support sections 101 respectively.

[0031] In this embodiment, the main body 1 and the support segment 101 retain their original design. The main body 1 is composed of multiple support segments 101, each of which is cylindrical with a gradually changing diameter to ensure precise fit and optimized blood flow for extravascular flow restriction. A transition segment 104 is added between two adjacent support segments 101. The two ends of the transition segment 104 smoothly join to the support segment 101, forming a seamless connection to ensure the continuity and stability of the main body 1. The design of the transition segment 104 aims to eliminate the abruptness of the direct connection between the support segments 101. Through the smooth design of the transition segment 104, the abrupt changes in structure are mitigated, improving the smoothness of the device when sliding on the side of the blood vessel, reducing friction, avoiding irritation and damage to the blood vessel, and improving biocompatibility. The design of the transition segment 104 ensures stable fit of the device outside the blood vessel, especially its adaptability in tortuous and complex vascular structures, such as arteriovenous fistula repair. In summary, the introduction of transition section 104 optimizes the overall structure of this device, achieves a smooth transition between adjacent support sections 101, improves the smoothness and biocompatibility of external vascular flow restriction, and further optimizes the surgical operation effect.

[0032] Furthermore, the outer wall of the transition section 104 is a conical surface.

[0033] In this embodiment, the transition section 104 of the conical outer wall is designed to more closely conform to the natural shape of the blood vessel wall when sliding on the vessel surface for position adjustment and size matching. The conical surface adapts to changes in the radial direction at both ends of the blood vessel, reducing gaps, increasing the contact area between the device and the blood vessel wall, enhancing sealing, avoiding blood flow disturbances, and reducing the risk of thrombosis. The conical wall design optimizes biocompatibility, provides excellent guidance during surgical procedures, reduces damage to the blood vessel wall, and improves surgical precision. It contributes to reducing complications, especially in complex vascular structures such as arteriovenous fistula repair and high-flow-limiting surgeries.

[0034] Furthermore, the support section 101 is cylindrical.

[0035] In this embodiment, the support segment 101 is designed as a cylinder. Compared to the previous cylindrical design, the cylindrical design provides a more uniform distribution of support force, reduces local stress concentration, enhances the uniformity and stability of vascular support and flow restriction, avoids possible local compression damage, and is more adaptable to the physiological morphology of blood vessels. The cylindrical support segment 101 optimizes the stability of the device within the blood vessel, especially in hemodynamics. The cylindrical shape allows for smoother sliding, reduces blood flow resistance, improves blood flow efficiency, and lowers the risk of thrombosis. In applications such as arteriovenous fistula repair surgery, it improves operational precision and reduces complications.

[0036] Furthermore, the diameters at both ends of the transition section 104 are equal to the diameters of the two adjacent support sections 101.

[0037] In this embodiment, diameter matching is emphasized. The diameters at both ends of the transition section 104 are exactly equal to the diameter of the adjacent support section 101, achieving seamless connection. This design aims to ensure a seamless transition in diameter between the transition section 104 and the support section 101, eliminating any step-like feel, improving the smoothness of the high-flow-limiting ligation process, reducing friction, minimizing vascular damage, and enhancing the overall stability of the device. This avoids localized stress concentration and reduces the risk of thrombosis. The precisely matched diameter design reduces adjustment time during surgical procedures and improves surgical accuracy.

[0038] Furthermore, the main body 1 is a telescopic main body, and the support section 101 has an insertion groove 105. The support section 101 is slidably inserted into the insertion groove 105 of another adjacent support section 101.

[0039] In this embodiment, the main body 1 adopts a telescopic structure, meaning that the device can adjust its length according to the actual needs of the blood vessel, providing flexibility to adapt to different blood vessel sizes and surgical requirements. The support segment 101 has a built-in insertion slot 105, a key design feature that provides a track for sliding between support segments 101, allowing them to slide and adjust rather than being fixed in place. The support segment 101 slides into the insertion slot 105 of adjacent support segments 101. This design allows the operator to adjust the position of the support segment 101 according to surgical needs, achieving precise blood vessel positioning, optimizing hemodynamics, and improving surgical adaptability. This design provides unprecedented freedom of adjustment in complex vascular surgeries such as arteriovenous fistulas and vascular repair. The telescopic main body adapts to different blood vessel lengths, and the precise positioning of the sliding support segment 101 reduces unnecessary pressure on the blood vessel wall, optimizes blood flow, reduces the risk of complications, and improves surgical success rates and patient quality of life.

[0040] Furthermore, a transition section 104 is provided on each support section 101 at one end near the head 102.

[0041] In this embodiment, each support segment 101 has a transition segment 104 near the head 102, i.e., the side closest to the device head 102. This layout design aims to provide additional smoothness to the part of the device near the head 102, facilitating precise placement of the device and the head 102 and reducing stimulation to blood vessels. During surgical procedures, especially in the guiding direction area of ​​the head 102, the precise placement of the transition segment 104 near the head 102 allows for smoother device sliding, reducing friction and potential damage to the outer wall of the blood vessel, and improving the precision of the surgical procedure. Particularly in complex surgeries such as arteriovenous fistula repair, this design reduces surgical difficulty, increases the success rate, and reduces postoperative complications.

[0042] Furthermore, the support section 101 also has a graduated groove 106.

[0043] In this embodiment, each support segment 101 is equipped with a graduated groove 106. These grooves 106 provide real-time intraoperative reference for visual guidance, allowing the surgeon to intuitively determine the relative position of the support segment 101 without the need for additional tools, thus improving the intuitiveness and convenience of the operation. During surgery, when performing procedures on blood vessels or when repairing and reshaping them, it is necessary to cut the blood vessel along its axial direction. The graduated grooves 106 enable the operator to accurately cut the length of the blood vessel. Simultaneously, the graduated grooves 106 reduce dimensional errors. Especially in surgeries such as arteriovenous fistula repair, this real-time positioning assistance improves surgical precision, reduces the number of adjustments, shortens surgical time, lowers surgical risks, and improves patient safety and quality of life.

[0044] Furthermore, the diameter difference between two adjacent support sections 101 is 0.1~1mm.

[0045] In this embodiment, following the basic design, the main body 1 integrates multiple support segments 101, all of which are cylindrical. However, the key to this embodiment lies in the control of the diameter difference between adjacent segments. The diameter difference between adjacent support segments 101 is strictly controlled within 0.1 mm. This fine-tuning design creates a smooth blood flow transition in the blood vessel, avoids pressure concentration caused by sudden changes in fluid shear force, reduces the risk of thrombosis, and protects the vascular endothelial cells. In surgeries such as arteriovenous fistula repair, the fine-tuned diameter difference design of the support segments 101 makes blood flow smoother, reduces the impact on the vessel wall, helps postoperative healing, reduces complications, and accelerates recovery. This precise diameter difference control provides surgeons with more intuitive adjustment guidance during surgical operations, improving the accuracy and safety of the surgery.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for assisting in vascular shaping, support, and flow restriction, characterized in that, include: The main body (1) has several sequentially connected support segments (101), the support segments (101) are cylindrical, and the diameter of the support segments (101) changes sequentially; The main body (1) has a head (102) and a tail (103), the head (102) and the tail (103) are located at the two ends of the main body (1), and the head (102) is ellipsoidal.

2. The auxiliary vascular shaping support and flow limiting device according to claim 1, characterized in that, The main body (1) also has a transition section (104), the two ends of which are respectively connected to the two adjacent support sections (101).

3. The auxiliary vascular shaping support and flow limiting device according to claim 2, characterized in that, The outer wall of the transition section (104) is a conical surface.

4. The auxiliary vascular shaping support and flow limiting device according to claim 3, characterized in that, The support section (101) is cylindrical.

5. The auxiliary vascular shaping support and flow limiting device according to claim 4, characterized in that, The diameters at both ends of the transition section (104) are equal to the diameters of the two adjacent support sections (101).

6. The auxiliary vascular shaping support and flow limiting device according to claim 1, characterized in that, The main body (1) is a telescopic body, and the support section (101) has an insertion groove (105). The support section (101) is slidably inserted into the insertion groove (105) of the adjacent support section (101).

7. The auxiliary vascular shaping support and flow limiting device according to claim 2, characterized in that, The transition section (104) is disposed on one end of each support section (101) near the head (102).

8. The auxiliary vascular shaping support and flow limiting device according to claim 1, characterized in that, The support section (101) also has a scale groove (106).

9. The auxiliary vascular shaping support and flow limiting device according to claim 1, characterized in that, The diameter difference between two adjacent support segments (101) is 0.1~1mm.

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