B-ultrasonic guided internal arteriovenous fistula puncture needle support

Abstract

The application discloses a B-ultrasound-guided arteriovenous fistula puncture needle support, which comprises a bottom plate and a frame plate, a rotating shaft column is arranged in the middle of the front end of the bottom plate, and a plurality of groups of bearing columns with the same height as the rotating shaft column are arranged at the rear end of the bottom plate; the top of the rotating shaft column is movably connected with the middle of the front end section of the frame plate through a rotating shaft assembly; a vertical plate is vertically and fixedly connected to the surface of the middle of the frame plate, a puncture fixing assembly is connected to one side of the vertical plate, and an elastic clamping groove for clamping a B-ultrasound probe is arranged on the other side of the frame plate; wherein, an angle adjusting assembly is arranged at the bottom of the rear end of the frame plate, and the angle adjusting assembly is connected with the bottom plate through a lifting assembly. The frame plate can be rotated left and right along the rotating shaft column through cooperation of the arc-shaped sliding rail and the arc-shaped sliding block, so that the puncture needle can be rotated in the transverse direction, and the position of the puncture needle is adjusted; and the threaded rod is rotated to drive the threaded cylinder to move forward and backward, the inclination angle of the connecting rod is adjusted, and the longitudinal angle of the clamping plate and the puncture needle is adjusted.

Description

Technical Field

[0001] This application belongs to the field of puncture needle stent technology, specifically relating to an ultrasound-guided arteriovenous fistula puncture needle stent. Background Technology

[0002] Arteriovenous fistulas (AVFs) are crucial for maintaining long-term vascular access in hemodialysis patients. However, in clinical practice, traditional puncture methods often present significant challenges for some complex AVF cases due to poor vascular conditions (such as thin, tortuous, or calcified vessels), deep locations, or the presence of scar tissue. These methods often result in low success rates and are prone to complications such as bleeding, hematoma, and infection, causing patient suffering and increasing the workload and risks for healthcare professionals. Currently, although ultrasound-assisted localization helps locate the vessel, the procedure still requires healthcare professionals to hold the puncture needle, making it difficult to precisely control the puncture angle and depth, leading to instability and inaccuracy in the puncture process.

[0003] Patent CN216933404U discloses an ultrasound probe-guided puncture stent. This patent involves rotating a knob, which drives a lead screw to rotate. The lead screw then moves a threaded sleeve horizontally, causing a connecting piece to slide within a slot. During this movement, the connecting piece pushes the ultrasound probe via an adjusting rod, causing the ultrasound probe to rotate around a hinge axis at its other end. This allows for simultaneous adjustment of the angles of both the disposable guide sleeve and the ultrasound probe. However, this patent only adjusts the longitudinal angle of the puncture stent, not its lateral angle, thus limiting its applicability. Utility Model Content

[0004] This application provides a B-ultrasound-guided arteriovenous fistula puncture needle stent to solve the above-mentioned technical problems.

[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is: a B-ultrasound-guided arteriovenous fistula puncture needle support, comprising: a base plate and a frame plate, wherein a pivot column is provided at the middle of the front end of the base plate, and multiple sets of receiving columns of the same height as the pivot column are provided at the rear end of the base plate; the top of the pivot column is movably connected to the middle of the front end section of the frame plate through a pivot assembly; a vertical plate is vertically fixed to the middle surface of the frame plate, a puncture fixation assembly is connected to one side of the vertical plate, and an elastic slot for locking the B-ultrasound probe is provided on the other side of the frame plate; wherein, an angle adjustment assembly is provided at the bottom of the rear end of the frame plate, and the angle adjustment assembly is connected to the base plate below through a lifting assembly.

[0006] Furthermore, the pivot assembly includes a U-shaped plate fixed above the pivot column and an insert plate vertically fixed to the middle of the front end section of the frame plate. The insert plate is inserted into the U-shaped plate and connected via the pivot.

[0007] Furthermore, a strip-shaped slot is provided in the center of the central axis of the base plate, and a threaded rod is provided in the strip-shaped slot; a threaded cylinder is sleeved in the threaded rod, and the upper end of the threaded cylinder is connected to the lifting assembly through the first hinge.

[0008] Furthermore, along the central axis of the base plate, a first through hole is provided between the side of the inner wall of the strip slot away from the rotating shaft column and the rear end of the base plate; the front end of the threaded rod is connected to the inner wall of the strip slot through a first bushing, and the rear end of the threaded rod passes through the first through hole through a second bushing and extends out of the edge of the base plate; wherein, an adjusting turntable is connected to the rear end of the threaded rod.

[0009] Furthermore, the angle adjustment component includes an arc-shaped slide rail fixed to the bottom of the rear end of the frame plate and an arc-shaped sliding block connected to the arc-shaped slide rail. The bottom of the arc-shaped sliding block is connected to the lifting component via a hinge. The axis of the arc-shaped slide rail coincides with the axis of the rotating column.

[0010] Furthermore, the lifting assembly includes a connecting rod, one end of which is connected to a threaded cylinder via a hinge, and the other end of which is connected to the lower end of an arc-shaped sliding block via a second hinge.

[0011] Furthermore, the puncture fixation assembly includes a guide sleeve and a puncture needle retainer. The puncture needle retainer is fitted into the guide sleeve, and the puncture needle retainer has a second through hole inside that can accommodate the puncture needle. The inner wall of the second through hole is provided with an elastic pressure block assembly.

[0012] Furthermore, the elastic pressure block assembly includes a spring and a flexible pressure block. Multiple grooves are linearly provided on the inner wall of the puncture needle retainer, the spring is fixed inside the groove, and the flexible pressure block is disposed below the spring.

[0013] Furthermore, the bottom of the base plate is concave, and there are straps on both sides of the base plate.

[0014] The beneficial effects of this application are: the arc-shaped slide rail and the arc-shaped slider can make the frame plate rotate left and right along the rotating shaft column, thereby ensuring that the puncture needle can rotate laterally and thus adjust the position of the puncture needle; while the rotation of the threaded rod can drive the threaded cylinder to move back and forth, thereby adjusting the longitudinal angle of the clamping plate and the puncture needle by adjusting the inclination angle of the adjusting rod. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of an embodiment of the ultrasound-guided arteriovenous fistula puncture needle stent of this application; Figure 2 This is a side cross-sectional view of another embodiment of the ultrasound-guided arteriovenous fistula puncture needle stent of this application; Figure 3 yes Figure 1 A schematic diagram of the structure of region A in the diagram; Figure 4 yes Figure 2 A schematic diagram of the structure of an embodiment of the angle adjustment component; Figure 5 yes Figure 2 A schematic diagram of the structure of region B in the diagram; Figure 6 yes Figure 2 A schematic diagram of the structure of region C in the diagram. Detailed Implementation

[0016] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0017] like Figure 1-2 As shown, this application discloses a B-ultrasound-guided arteriovenous fistula puncture needle support, comprising: a base plate 1 and a support plate 2. A pivot column 3 is provided at the middle of the front end of the base plate 1, and multiple sets of receiving columns 11 with the same height as the pivot column 3 are provided at the rear end of the base plate 1. The top of the pivot column 3 is movably connected to the middle of the front end of the support plate 2 via a pivot assembly 4. A vertical plate 21 is vertically fixed to the middle surface of the support plate 2, and a puncture fixation assembly 5 is connected to one side of the vertical plate 21. An elastic slot 6 for securing the B-ultrasound probe is provided on the other side of the support plate 2. An angle adjustment assembly 7 is provided at the bottom of the rear end of the support plate 2, and the angle adjustment assembly 7 is connected to the base plate 1 via a lifting assembly 8. The pivot column 3 in the above design allows the support plate 2 to rotate along the pivot column 3 to adjust the lateral angle of the puncture needle. The pivot assembly 4 can adjust the longitudinal angle of the support plate 2 and the puncture fixation assembly 5. The elastic slot 6 can hold the ultrasound probe so that the direction of the ultrasound probe is fixed with the direction of the puncture needle in the puncture fixation component 5, thereby reducing the probability of puncture failure.

[0018] like Figure 3 As shown, the rotating shaft assembly 4 includes a U-shaped plate 41 fixed above the rotating shaft column 3 and an insert plate 42 vertically fixed to the middle of the front end section of the frame plate 2. The insert plate 42 is inserted into the U-shaped plate 41 and connected by a rotating shaft 43. In the above design, the insert plate 42 and the U-shaped plate 41 can rotate relative to each other through the rotating shaft 43, thereby driving the longitudinal angle adjustment of the frame plate 2.

[0019] like Figure 4-5 As shown, a strip-shaped slot 12 is provided in the middle of the central axis of the base plate 1, and a threaded rod 9 is provided in the strip-shaped slot 12; a threaded cylinder 91 is sleeved in the threaded rod 9, and the upper end of the threaded cylinder 91 is connected to the lifting assembly 8 through a first hinge 82. In the above design, the rotation of the threaded rod 9 can drive the threaded cylinder 91 to move back and forth, while the strip-shaped slot 12 can ensure that the connection between the threaded cylinder 91 and the lifting assembly 8 is not obstructed.

[0020] Along the central axis of the base plate 1, a first through hole 13 is provided between the side of the inner wall of the strip-shaped slot 12 away from the rotating shaft column 3 and the rear end of the base plate 1; the front end of the threaded rod 9 is connected to the inner wall of the strip-shaped slot 12 through a first bushing 92, and the rear end of the threaded rod 9 passes through the first through hole 13 through a second bushing 93 and extends out of the edge of the base plate 1; wherein, an adjusting turntable 94 is connected to the rear end of the threaded rod 9. In the above design, the first bushing 92 and the second bushing 93 are sleeved on the front and rear sides of the threaded rod 9, thereby ensuring that the adjusting turntable 94 can drive the threaded rod 9 to rotate freely, thereby controlling the position of the threaded cylinder 91.

[0021] The angle adjustment assembly 7 includes an arc-shaped slide rail 71 fixed to the bottom rear end of the support plate 2 and an arc-shaped sliding block 72 connected to the arc-shaped slide rail 71. The bottom of the arc-shaped sliding block 72 is connected to the lifting assembly 8 via a hinge. The axis of the arc-shaped slide rail 71 coincides with the axis of the rotating shaft column 3. In the above design, the support plate 2 can be adjusted laterally along the rotating shaft column 3 through the sliding engagement of the arc-shaped slide rail 71 and the arc-shaped sliding block 72, thereby adjusting the lateral angle of the puncture needle.

[0022] The lifting assembly 8 includes a connecting rod 81. One end of the connecting rod 81 is connected to the threaded cylinder 91 via a hinge, and the other end of the connecting rod 81 is connected to the lower end of the arc-shaped sliding block 72 via a second hinge 83. In the above design, both sides of the connecting rod 81 are connected by hinges, so that the forward and backward movement of the threaded cylinder 91 can control the tilt angle of the connecting rod 81, thereby adjusting the longitudinal angle of the frame plate 2.

[0023] The puncture fixation assembly 5 includes a guide sleeve 51 and a puncture needle retainer 52. The puncture needle retainer 52 is fitted into the guide sleeve 51. The puncture needle retainer 52 has a second through hole 53 inside to accommodate the puncture needle, and an elastic pressure block assembly 54 is provided on the inner wall of the second through hole 53. In the above design, the puncture needle is fitted into the puncture needle retainer 52, and the elastic pressure block assembly 54 can press the puncture needle to fix it in the axial direction of the guide sleeve 51, ensuring that the puncture needle can accurately puncture the blood vessel along the direction of the blood vessel located by B-ultrasound during puncture.

[0024] like Figure 6 As shown, the elastic pressure block assembly 54 includes a spring 541 and a flexible pressure block 542. Multiple grooves 55 are linearly arranged on the inner wall of the puncture needle retainer 52. The spring 541 is fixed inside the grooves 55, and the flexible pressure block 542 is disposed below the spring 541. In this design, the flexible pressure block 542 is located within the puncture needle retainer 52 when there is no puncture needle. When the puncture needle is inserted into the puncture needle retainer 52, the puncture needle abuts against the flexible pressure block 542 upwards. Under the elastic force of the spring 541, the flexible pressure block 542 can tightly press the puncture needle, preventing the puncture needle from shifting.

[0025] The bottom of the base plate 1 is concave, and straps 9 are provided on both sides of the base plate 1. The concave base plate 1 in the above design can better fit the patient's limb, and the base plate 1 can be completely fixed by the straps 9.

[0026] The specific usage method is as follows: The base plate 1 is fixed to one side of the patient's arteriovenous fistula using the strap 9. The puncture needle is inserted into the puncture needle retainer 52, and the ultrasound probe is secured in the elastic slot 6. Then, the adjusting turntable 94 is rotated to move the threaded cylinder 91 backward, increasing the tilt angle and raising the rear end of the support plate 2, thus adjusting the longitudinal angle. The ultrasound image of the blood vessel is then observed. Finally, the support plate 2 is adjusted left and right according to the actual angle to adjust the lateral angle of the puncture. Angle adjustment is stopped once the appropriate puncture position is reached. During puncture, the puncture needle accurately enters the blood vessel along the direction indicated by the ultrasound.

[0027] This application utilizes precise ultrasound positioning on the stent and guidance from a needle guide device, enabling medical staff to more accurately insert the needle into the blood vessel. This avoids the deviations in puncture angle and position caused by manual operation in traditional puncture methods, significantly improving the success rate of punctures for complex arteriovenous fistulas. Because the needle can accurately puncture the blood vessel, damage to surrounding tissues is reduced, thereby lowering the risk of complications such as bleeding, hematoma, and infection, which is beneficial for postoperative recovery and improves the patient's quality of life.

[0028] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A stent for an arteriovenous fistula puncture needle under ultrasound guidance, characterized in that, include: The base plate and the frame plate are provided. The base plate has a pivot column at the center of its front end and multiple sets of supporting columns at the rear end of the base plate with the same height as the pivot column. The top of the pivot column is movably connected to the center of the front end section of the frame plate through a pivot assembly. A vertical plate is fixedly attached to the middle surface of the frame plate. A puncture fixation assembly is connected to one side of the vertical plate, and an elastic slot for securing an ultrasound probe is provided on the other side of the frame plate. An angle adjustment assembly is provided at the bottom of the rear end of the frame plate, and the angle adjustment assembly is connected to the base plate below through a lifting assembly.

2. The arteriovenous fistula puncture needle stent under ultrasound guidance according to claim 1, characterized in that, The pivot assembly includes a U-shaped plate fixed above the pivot column and an insert plate vertically fixed to the middle of the front end section of the frame plate. The insert plate is inserted into the U-shaped plate and connected by the pivot.

3. The arteriovenous fistula puncture needle stent under ultrasound guidance according to claim 1, characterized in that, The base plate has a strip-shaped slot in the middle of its central axis, and a threaded rod is provided in the strip-shaped slot; a threaded cylinder is sleeved in the threaded rod, and the upper end of the threaded cylinder is connected to the lifting assembly through a first hinge.

4. The arteriovenous fistula puncture needle stent under ultrasound guidance according to claim 3, characterized in that, Along the central axis of the base plate, a first through hole is provided between the side of the inner wall of the strip-shaped slot away from the pivot column and the rear end of the base plate; the front end of the threaded rod is connected to the inner wall of the strip-shaped slot through a first bushing, and the rear end of the threaded rod passes through the first through hole through a second bushing and extends out of the edge of the base plate; wherein, an adjusting turntable is connected to the rear end of the threaded rod.

5. The arteriovenous fistula puncture needle stent under ultrasound guidance according to claim 3, characterized in that, The angle adjustment assembly includes an arc-shaped slide rail fixed to the bottom of the rear end of the frame plate and an arc-shaped sliding block connected to the arc-shaped slide rail. The bottom of the arc-shaped sliding block is connected to the lifting assembly via a hinge. The axis of the arc-shaped slide rail coincides with the axis of the rotating shaft column.

6. The arteriovenous fistula puncture needle stent under ultrasound guidance according to claim 5, characterized in that, The lifting assembly includes a connecting rod, one end of which is connected to the threaded cylinder via a hinge, and the other end of which is connected to the lower end of the arc-shaped sliding block via a second hinge.

7. The arteriovenous fistula puncture needle stent under ultrasound guidance according to claim 1, characterized in that, The puncture fixation assembly includes a guide sleeve and a puncture needle fixator. The puncture needle fixator is sleeved in the guide sleeve. The puncture needle fixator has a second through hole inside that can accommodate the puncture needle. The inner wall of the second through hole is provided with an elastic pressure block assembly.

8. The arteriovenous fistula puncture needle stent under ultrasound guidance according to claim 7, characterized in that, The elastic pressure block assembly includes a spring and a flexible pressure block. The inner wall of the puncture needle fixator is provided with multiple grooves linearly. The spring is fixed inside the grooves, and the flexible pressure block is disposed below the spring.

9. A stent for an arteriovenous fistula puncture needle under ultrasound guidance according to claim 7, characterized in that, The bottom of the base plate is concave, and straps are provided on both sides of the base plate.

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