A hemostatic device for arteriovenous fistula in vascular surgery

Abstract

The utility model discloses a kind of vascular surgery arteriovenous fistula hemostasis device, it is related to vascular surgery technical field.Aiming at the problem that existing arteriovenous fistula hemostasis device is easy to cause fistula occlusion due to excessive compression, the utility model includes fixator and the pressurizer being set in the upper portion of fixator.The pressurizer is constituted by mounting cylinder, pressing assembly and power assembly, power assembly promotes pressing assembly to slide to exert pressure, when reaching maximum compression value, make pressing assembly and power assembly lock on mounting cylinder by self-locking mechanism, prevent excessive compression.Pressing assembly includes pressing slide bar and pressing head, and power assembly includes push rod and self-locking piece.Fixator is stably worn in the hemostasis site of patient by pressing plate and constraint assembly.The utility model is suitable for vascular surgery, nephrology, interventional department and other arteriovenous fistula hemostasis treatment, can effectively stop bleeding and avoid fistula occlusion risk.

Description

Technical Field

[0001] This utility model relates to the field of vascular surgery technology, specifically to a vascular surgical arteriovenous fistula hemostasis device. Background Technology

[0002] Arteriovenous fistulas (AVFs) are the "lifeline" for dialysis patients. Because blood flow increases significantly after AVF formation, bleeding from an AVF often results in large volumes of blood and rapid bleeding, which can be life-threatening in severe cases, requiring immediate and proper treatment. When an AVF bleeds, compression hemostasis can be used. Compression hemostasis directly blocks blood flow using external pressure to quickly control acute massive bleeding caused by severe aneurysms.

[0003] A search revealed Chinese patent CN216167644U, which discloses a hemostatic device for arteriovenous fistula in vascular surgery. The device includes a fixing ring, with a limiting block symmetrically slidably connected inside the fixing ring. One end of the limiting block is fixedly connected to a limiting rod, and a first spring is provided on the outer side of the limiting rod, located on one side of the limiting block. One end of the limiting rod is fixedly connected to a lifting seat, and an elastic pad is provided on one side of the lifting seat. A threaded rod that cooperates with the lifting seat is threadedly connected to the outer side of the fixing ring. The beneficial effects of this invention are: by setting up the threaded rod, lifting seat, elastic pad, limiting rod, limiting block, and first spring, it facilitates hemostasis; by setting up the hook and loop fastener, the loop fastener, rotating seat, ratchet, and pawl, it facilitates the wearing of the fixing ring; and by setting up the fixing shaft, spring, and rotating seat, it facilitates the storage of the loop fastener. It has good hemostatic effect and strong practicality.

[0004] However, existing arteriovenous fistula hemostasis devices use a rotating threaded rod to move the lifting seat downwards to press the area that needs hemostasis, thus achieving the function of hemostasis. However, due to the manual control, there is a possibility of excessive pressure leading to fistula occlusion. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a hemostatic device for arteriovenous fistulas in vascular surgery, which can prevent fistula occlusion caused by excessive compression and ensure patient safety during treatment.

[0006] The main idea of ​​the technical solution adopted by this utility model is as follows: the power component pushes the pressing component to slide inside the installation cylinder, applying appropriate pressure to the arteriovenous fistula to stop bleeding. When the maximum pressure value is reached, the self-locking mechanism is activated, and the pressing component and the power component are locked on the installation cylinder to prevent the pressing component from continuing to slide, thereby avoiding fistula occlusion caused by excessive pressure.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A vascular surgical arteriovenous fistula hemostasis device includes a fixator for arteriovenous fistula hemostasis, and a pressure device for applying pressure to the arteriovenous fistula is provided above the fixator. The pressure device includes: The mounting sleeve is connected to the retainer; The pressing component, located inside the mounting cylinder and sliding through the mounting cylinder, is used to apply pressure to stop bleeding in venous fistulas; A power component is slidably disposed within the pressing component to push the pressing component and to lock the pressing component when the maximum pressure value is reached.

[0008] Furthermore: the pressing component includes: Press the slide bar, slide it inside the mounting cylinder, and sequentially connect the circular hole and the rectangular hole axially from back to front. The pressing head is located at the front end of the pressing slide bar and outside the mounting cylinder.

[0009] Furthermore: the power assembly includes: The push rods, from back to front, consist of a round rod and a rectangular single-sided wedge rod, which are slidably connected in the round hole and the rectangular hole, respectively. The third elastic element is used to connect the push rod and the pressing slide rod.

[0010] Furthermore: also includes: The limit ring is fitted onto the push rod and has a self-locking component inside; The first self-locking through hole is provided on the mounting cylinder; The second self-locking through hole is provided on the pressing slide bar; When the pressure value reaches its maximum, the second self-locking through hole aligns with the first self-locking through hole and is locked by the self-locking component.

[0011] Furthermore: the self-locking element includes: The second slider is slidably disposed within the limiting ring along the radial direction of the limiting ring. The second elastic element is used to connect the second slider and the limiting ring.

[0012] The beneficial effects of this utility model are: 1. The power component pushes the pressing component to slide inside the mounting cylinder, applying appropriate pressure to the arteriovenous fistula for hemostasis. When the maximum pressure value is reached, the self-locking mechanism is activated, locking the pressing component and the power component on the mounting cylinder to prevent the pressing component from continuing to slide, thereby avoiding fistula occlusion caused by excessive pressure. This ensures that while effectively stopping hemostasis, the fistula will not be damaged due to excessive pressure, thus guaranteeing the patient's treatment safety.

[0013] 2. Compression hemostasis can be achieved by pushing the lever. The self-locking mechanism is automatically triggered, which reduces the difficulty of operation for medical staff, improves work efficiency, and reduces the risk of complications caused by improper operation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0015] Figure 1 This is a schematic diagram of the structure of a vascular surgical arteriovenous fistula hemostasis device according to the present invention; Figure 2 This is a half-sectional view of the pressure regulator of this utility model; Figure 3 This is a cross-sectional view of the pressure regulator of this utility model; Figure 4 This is a half-sectional view of the pressing component of this utility model; Figure 5 This is a half-sectional view of the power component of this utility model; In the picture: 1. Fixture; 101. Pressure plate; 102. Pull ring; 103. Strap; 104. Velcro 2. Pressure device; 201. Mounting cylinder; 202. Pressing slide bar; 203. Pressing head; 204. Circular hole; 205. Rectangular hole; 206. Second self-locking through hole; 207. First mounting hole; 208. First spring; 209. First slider; 210. Push rod; 211. Round rod; 212. Single-sided wedge rod; 213. Limiting ring; 214. Second mounting hole; 215. Third elastic element; 216. Second spring; 217. Second slider; 218. First self-locking through hole. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0018] See Figures 1-5This application discloses a hemostatic device for arteriovenous fistula in vascular surgery, including a fixator 1. A pressure device 2 for applying pressure to the arteriovenous fistula is located above the fixator 1. The pressure device 2, from the inside out, includes a mounting cylinder 201, a pressing component, and a power component. The power component pushes the pressing component to slide within the mounting cylinder 201, applying appropriate pressure to the arteriovenous fistula for hemostasis. When the maximum pressure value is reached, the pressing component and the power component lock onto the mounting cylinder 201, preventing the pressing component from continuing to slide, ensuring effective hemostasis and avoiding fistula occlusion due to excessive pressure.

[0019] Specifically, the fixator 1 includes a pressure plate 101 and a restraint assembly. The two ends of the pressure plate 101 are rotatably connected to the two ends of the restraint assembly, and the pressure plate 101 is worn on the hemostasis site of the patient's artery or vein puncture point through the restraint assembly.

[0020] The restraint assembly includes a pull ring 102, a strap 103, and Velcro 104. One end of the strap 103 is fixedly connected to the pull ring 102, and the other end is detachably connected to the pull ring 102 via Velcro 104. The two pull rings 102 are respectively hung within the rolled-up semicircles of the pressure plate 101. The end of the strap 103 with the Velcro 104 is then tightened. When tightened, the strap 103 transmits a downward force to the pressure plate 101, allowing the pressure plate 101 to be quickly applied to the patient's hemostatic site. The pressure plate 101 is a curved plate with identical rolled-up semicircles at both ends and through slots for detachable installation of the pull rings 102. The pull ring 102 includes a cylindrical structure and a rectangular frame, which are rotatably connected to make the pull ring 102 more adaptable to the human body. The pressure plate 101 and pull ring 102 are existing structures and will not be described in detail here. Position the pressure device 2 at the patient's arterial or venous puncture site, then hang the pull ring 102, the fixed connection end of the bandage 103 and the pull ring 102, inside the semicircle of the rolled-up pressure plate 101. The detachable connection end of the bandage 103 and the pull ring 102 is then hung inside the other semicircle of the rolled-up pressure plate 101. Tighten the bandage 103 with the Velcro 104, thereby applying downward pressure to the pressure plate 101 so that the pressure head 203 fits tightly against the patient's hemostasis site.

[0021] In some embodiments, the pressing assembly includes a pressing slide rod 202, which is slidably disposed within the mounting cylinder 201. A circular hole 204 and a rectangular hole 205 are sequentially connected axially from back to front within the pressing slide rod 202. A second self-locking through hole 206 and a first mounting hole 207 are sequentially formed on the side wall of the pressing slide rod 202 from back to front. An adjusting member is installed in the first mounting hole 207, and the adjusting member limits the movement of the power assembly. The front end of the pressing slide rod 202 is connected to a pressing head 203 and located outside the mounting cylinder 201, for direct contact with the patient's hemostasis site. A pre-pressed isolation film is applied to the pressing head 203 to prevent contamination.

[0022] Furthermore, the adjusting component includes a first spring 208 and a first slider 209. One end of the first spring 208 is connected to the first mounting hole 207, and the other end is connected to the first slider 209. The position of the first slider 209 is adjusted by the first spring 208, thereby limiting the power assembly. The power assembly pushes the pressing slide bar 202 to slide within the mounting cylinder 201, and the pressing head 203 applies pressure to the arteriovenous fistula. The second self-locking through hole 206 of the pressing slide bar 202 gradually approaches and aligns with the self-locking channel of the mounting cylinder 201. Continuing to push the power assembly, it slides within the pressing slide bar 202. In the rectangular hole 205, the power assembly compresses the first spring 208 through the first slider 209 until the first slider 209 is compressed into the first mounting hole 207. In other words, the adjusting component limits the power assembly, preventing it from swinging within the pressing slide bar 202.

[0023] In some embodiments, the power assembly includes a push rod 210, which is slidably disposed within a pressing slide bar 202. The push rod 210 consists of a round rod 211 and a rectangular single-sided wedge rod 212, arranged from back to front. The rectangular single-sided wedge rod 212 easily slides into a rectangular hole 205. An adjusting member limits the rectangular single-sided wedge rod 212 to prevent it from swinging. A limiting ring 213 is provided on the round rod 211, sliding within a circular hole 204. A second mounting hole 214 is radially provided on the limiting ring 213, and a self-locking member is provided within the second mounting hole 214. The self-locking member cooperates with a second self-locking through hole 206 for self-locking. A third elastic member 215 is sleeved on the round rod 211, positioned between the limiting ring 213 and the circular hole 204, for connecting the push rod 210 and the pressing slide bar 202. Pushing the push rod 210 causes the limiting ring 213 of the push rod 210 to push the pressing slide rod 202 to slide within the mounting cylinder 201 via the third elastic element 215. The pressing head 203 at the front end of the pressing slide rod 202 then applies pressure to the arteriovenous fistula until the maximum pressure value of the arteriovenous fistula is reached. At this time, the second self-locking through hole 206 of the pressing slide rod 202 gradually aligns with the self-locking channel of the mounting cylinder 201. Continuing to push the push rod 210 causes it to slide only within the pressing slide rod 202. To prevent excessive pressure from causing fistula occlusion, the specific sliding principle is as follows: the rectangular single-sided wedge rod 212 of the push rod 210 slides into the rectangular hole 205 of the pressing slide rod 202. The wedge-shaped surface of the rectangular single-sided wedge rod 212 compresses the first spring 208 through the first slider 209 until the first slider 209 is compressed into the first mounting hole 207. Then, the push rod 210 is pushed and continues to slide within the pressing slide rod 202 until the self-locking mechanism begins to function.

[0024] In some embodiments, the self-locking member includes a second spring 216 and a second slider 217. One end of the second spring 216 is connected to the second mounting hole 214, and the other end is connected to the second slider 217. The second slider 217 slides radially along the limiting ring 213.

[0025] It should be added that the self-locking channel of the mounting cylinder 201 is opened on the side wall of the mounting cylinder 201, specifically the first self-locking through hole 218. The first self-locking through hole 218 cooperates with the second self-locking through hole 206 and the self-locking component to lock the pressing component and the power component on the mounting cylinder 201.

[0026] The specific working principle of the self-locking mechanism is as follows: the push rod 210 drives the limiting ring 213 to slide within the pressing slide rod 202. At this time, because the limiting ring 213 cooperates with the circular hole 204 of the pressing slide rod 202, the self-locking component is continuously compressed within the limiting ring 213. When the preset maximum pressure value is reached, the second mounting hole 214 of the limiting ring 213 aligns with the second self-locking through hole 206 and the first self-locking through hole 218. The second spring 216 elastically resets, pushing the second slider 217 through the second mounting hole 214, through the second self-locking through hole 206, and then embedded in the first self-locking through hole 218, preventing the pressing slide rod 202 and the push rod 210 from sliding within the mounting cylinder 201, thus achieving self-locking and preventing excessive pressure from causing arteriovenous fistula occlusion.

[0027] One usage process of this embodiment is as follows: 1. Wear a restraint device: Remove the pre-pressed isolation film on the compression head 203, then align the compression head 203 with the patient's arterial or venous puncture point. Next, hang the pull ring 102, the fixed connection end of the bandage 103 and the pull ring 102, inside the rolled-up semicircle of the pressure plate 101. Then, hang the detachable connection end of the bandage 103 and the pull ring 102 inside the other rolled-up semicircle of the pressure plate 101. Tighten the bandage 103 with the Velcro 104 to apply downward pressure to the pressure plate 101, so that the compression head 203 fits tightly against the patient's hemostasis site.

[0028] 2. Apply pressure to stop bleeding: Pushing the push rod 210 activates the power assembly. First, the limiting ring 213 of the push rod 210 pushes the pressing slide 202 to slide within the mounting cylinder 201 via the third elastic element 215. The pressing head 203 at the front end of the pressing slide 202 then applies pressure to the arteriovenous fistula. The second self-locking through hole 206 of the pressing slide 202 gradually approaches and aligns with the first self-locking through hole 218 of the mounting cylinder 201.

[0029] As the push rod 210 continues to be pushed, the rectangular single-sided wedge rod 212 of the push rod 210 slides into the rectangular hole 205 of the pressing slide rod 202. At this time, when the push rod 210 is pushed, the wedge-shaped surface of the rectangular single-sided wedge rod 212 compresses the first spring 208 through the first slider 209 until the first slider 209 is compressed into the first mounting hole 207. During this process, the push rod 210 only slides within the pressing slide rod 202 to prevent excessive pressure from causing fistula closure.

[0030] During the above process, the push rod 210 drives the limiting ring 213 to slide within the pressing slide rod 202. Since the limiting ring 213 cooperates with the circular hole 204 of the pressing slide rod 202, the self-locking component is continuously compressed within the limiting ring 213.

[0031] Continue pushing until the preset maximum pressure value is reached. The second mounting hole 214 of the limiting ring 213 aligns with the second self-locking through hole 206 and the first self-locking through hole 218. The second spring 216 elastically resets, pushing the second slider 217 out of the second mounting hole 214, through the second self-locking through hole 206, and then into the first self-locking through hole 218. This prevents the pressing slide rod 202 and the push rod 210 from sliding in the mounting cylinder 201, thus achieving self-locking and preventing excessive pressure from causing arteriovenous fistula occlusion.

[0032] 3. Hemostasis maintenance and monitoring: The hemostatic device remains on the patient for 2-4 hours. During this time, the doctor will regularly check the hemostatic site to ensure that the hemostasis is effective and that there are no complications such as fistula occlusion.

[0033] 4. Achieve hemostasis: After hemostasis is achieved, the self-locking mechanism can be released through appropriate operation, the device can be removed, and the hemostasis site can be checked.

[0034] Specific use cases: In the vascular surgery ward of a large tertiary hospital, a kidney patient who had been receiving long-term hemodialysis experienced arteriovenous fistula bleeding, a common complication, after his most recent dialysis session. The bleeding occurred near the anastomosis of the arteriovenous fistula in his forearm, with blood rapidly seeping out and soaking his clothing. The situation was extremely urgent and would seriously threaten the patient's life if not treated promptly. The vascular surgeon responded quickly and decided to use this practical vascular surgical arteriovenous fistula hemostasis device for emergency hemostasis.

[0035] First, put on the fixation device 1, ensuring that the pressing head 203 is aligned with the patient's arterial or venous puncture point. Then, push the push rod 210 to start the power component to apply pressure to the arteriovenous fistula until the pressing slide 202 stops sliding and applying pressure, preventing excessive pressure from causing fistula occlusion. Then, continue to push the push rod 210 until the self-locking mechanism is activated, preventing the pressing slide 202 and the push rod 210 from sliding within the mounting cylinder 201, thus achieving self-locking and preventing excessive pressure from causing arteriovenous fistula occlusion.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vascular surgical arteriovenous fistula hemostasis device, comprising a fixator (1), wherein a pressure device (2) for applying pressure to the arteriovenous fistula is provided above the fixator (1), characterized in that: The pressurizer (2) includes: The mounting sleeve (201) is connected to the fixing device (1); The pressing component is located inside the mounting cylinder (201) and slides through the mounting cylinder (201) for applying pressure to stop bleeding in venous fistulas; A power component is slidably disposed within the pressing component to push the pressing component and to lock the pressing component when the maximum pressure value is reached.

2. The hemostatic device for vascular surgery arteriovenous fistula according to claim 1, characterized in that: The pressing component includes: Press the slide bar (202) and slide it inside the mounting cylinder (201). A circular hole (204) and a rectangular hole (205) are sequentially opened from back to front. The pressing head (203) is located at the front end of the pressing slide bar (202) and outside the mounting cylinder (201).

3. The vascular surgical arteriovenous fistula hemostasis device according to claim 2, characterized in that: The power assembly includes: The push rod (210) consists of a round rod (211) and a rectangular single-sided wedge rod (212) from back to front, which are slidably connected in the round hole (204) and the rectangular hole (205) respectively. The third elastic element (215) is used to connect the push rod (210) and the pressing slide rod (202).

4. The vascular surgical arteriovenous fistula hemostasis device according to claim 3, characterized in that: Also includes: The limiting ring (213) is sleeved on the push rod (210) and has a self-locking component inside; The first self-locking through hole (218) is provided on the mounting cylinder (201); The second self-locking through hole (206) is provided on the pressing slide bar (202); When the pressure value reaches its maximum, the second self-locking through hole (206) aligns with the first self-locking through hole (218) and is locked by the self-locking component.

5. The hemostatic device for vascular surgery arteriovenous fistula according to claim 4, characterized in that: The self-locking component includes: The second slider (217) is radially slidably disposed within the limiting ring (213); The second elastic element (216) is used to connect the second slider (217) and the limiting ring (213).

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