Mechanical navigation device for venous puncture in endovenous thermal ablation of varicose veins of the lower limbs

Abstract

The application discloses a kind of venipuncture mechanical navigation devices in lower limb varicose vein intraluminal thermal ablation, including fixed plate, first fixed band, second fixed band, angle adjusting frame and needle assembly, the side upper end of fixed plate is equipped with telescopic pusher, it is suitable for push in the side of the handle of ultrasonic probe, first fixed band is equipped in the end of pusher, for the handle of ultrasonic probe is fixed in the end of pusher, second fixed band is connected to the side lower end of fixed plate, for the head of ultrasonic probe is fixed in the side of fixed plate, angle adjusting frame is equipped in the other end of fixed plate, and can be along the height direction of fixed plate sliding adjustment, needle assembly is equipped in angle adjusting frame, and the included angle of needle assembly and fixed plate can be adjusted by angle, wherein, needle channel for accommodating puncture needle is equipped on needle assembly, the extension line of the axis of needle channel and the tangent plane of probe are in the same plane, the application can greatly improve the accuracy of venipuncture.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically, to a mechanical navigation device for venous puncture during endovenous thermal ablation of varicose veins in the lower extremities. Background Technology

[0002] Endovenous thermal ablation (such as laser or radiofrequency ablation) is currently the mainstream minimally invasive procedure for treating varicose veins in the lower extremities. The crucial first step is to accurately puncture the target vein under ultrasound guidance; the success of the puncture directly determines the success or failure of subsequent instrument insertion and ablation treatment.

[0003] Currently, the standard clinical procedure involves the doctor holding an ultrasound probe in one hand and a puncture needle in the other, relying entirely on personal experience and hand-eye coordination to locate the needle tip in the two-dimensional ultrasound image and continuously adjust the insertion angle so that the entire path of the puncture needle falls within the detection plane (section) emitted by the ultrasound probe. This process requires extremely high hand stability and spatial imagination.

[0004] However, existing technologies have significant shortcomings in practical applications. First, during manual puncture, it is difficult for doctors to maintain the relative position of the probe and the target vein, as well as the precise angle of the puncture needle, for an extended period of time. Even the slightest tremor in the hand can cause the needle tip to deviate from the ultrasound plane, requiring repeated adjustments, which prolongs the operation time and increases the risk of damage to blood vessels and surrounding tissues from multiple punctures.

[0005] Therefore, it is necessary to make further improvements to the existing technology. Summary of the Invention

[0006] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the object of this invention is to provide a mechanical navigation device for venous puncture during endovenous thermal ablation of varicose veins in the lower extremities.

[0007] To achieve the above objectives, a mechanical navigation device for venous puncture during endovenous thermal ablation of varicose veins in the lower extremities, according to an embodiment of the present invention, includes a fixation plate, a first fixation belt, a second fixation belt, an angle adjustment frame, and a needle insertion assembly.

[0008] The upper side of one side of the fixing plate is provided with a retractable pusher, which is suitable for pushing against one side of the handle of the ultrasonic probe.

[0009] The first fixing strap is located at the end of the pusher and is used to fix the handle of the ultrasonic probe at the end of the pusher.

[0010] The second fixing strap is connected to the lower end of one side of the fixing plate and is used to fix the head of the ultrasonic probe to one side of the fixing plate.

[0011] The angle adjustment bracket is located at the other end of the fixed plate and can be slidably adjusted along the height direction of the fixed plate.

[0012] The needle insertion assembly is mounted on the angle adjustment frame, and the angle between the needle insertion assembly and the fixed plate can be adjusted by the angle adjustment.

[0013] The needle insertion assembly is provided with a needle insertion channel for accommodating the puncture needle, and the extension line of the axis of the needle insertion channel is in the same plane as the cross-section of the probe.

[0014] In addition, the mechanical navigation device for venous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to the above embodiments of the present invention may also have the following additional technical features: According to one embodiment of the present invention, the angle adjustment bracket includes a connecting plate, a mounting plate, an opening and closing assembly, and a first locking screw.

[0015] The other side of the fixed plate is provided with a slide rail along its own height direction, and the connecting plate is slidably disposed on the slide rail.

[0016] The mounting plate has a connecting arm at its lower end, the distal end of which is rotatably connected to the lower end of the connecting plate. The mounting plate has an arc-shaped telescopic arm at its upper end, the distal end of which is connected to the upper end of the connecting plate. The needle insertion assembly is located on the side of the mounting plate opposite to the connecting plate.

[0017] The opening and closing component is located on the connecting plate and is used to control the opening and closing of the needle insertion component so that the needle insertion channel can switch between opening and closing, making it easier for the needle insertion component to be separated after the puncture needle is inserted.

[0018] The first locking screw is located on the connecting plate and is used to lock the position of the connecting plate.

[0019] According to one embodiment of the present invention, the arc-shaped telescopic arm includes a first arc-shaped portion, a second arc-shaped portion, and a second locking screw.

[0020] One end of the first arc-shaped portion is connected to the connecting plate, and the first arc-shaped portion is a hollow structure.

[0021] One end of the second arc-shaped part is connected to the mounting plate, and the other end is inserted into the first arc-shaped part by the other end of the first arc-shaped part, and can be extended and retracted.

[0022] The second locking screw is located on the first arc-shaped portion to lock the insertion depth of the second arc-shaped portion.

[0023] According to one embodiment of the present invention, the needle insertion assembly includes two arc-shaped pieces and two connecting pieces.

[0024] The two arc-shaped plates are arranged opposite each other, and the needle insertion channel for accommodating the puncture needle is defined between the two arc-shaped plates.

[0025] The two connecting pieces are connected to the two arc-shaped pieces in a one-to-one correspondence.

[0026] The mounting plate has a connecting groove on the side opposite to the connecting plate. The left and right walls of the connecting groove are each provided with a first sliding groove. The first sliding groove extends in the front-back direction. The upper ends of the two connecting pieces are slidably connected to the first sliding grooves. The lower end of the opening and closing component contacts the two connecting pieces to drive the two connecting pieces to move the two arc-shaped pieces relative to each other, so that the needle insertion channels on the two arc-shaped pieces can be switched between an open state and a closed state.

[0027] According to one embodiment of the present invention, the opening and closing assembly includes a sliding block, a connecting block, a first driving block, a second driving block, and a return spring.

[0028] The mounting plate is provided with a second sliding groove on the side near the connecting plate. The second sliding groove extends along the length of the mounting plate. The sliding block is slidably disposed in the second sliding groove. The bottom of the second sliding groove is provided with a through groove that extends to the connecting groove.

[0029] The connecting block includes a first extension and a second extension. The first extension passes through the through groove. The upper end of the first extension is connected to the sliding block. The lower end of the first extension extends between the two connecting pieces. The second extension is connected to the lower end of the first extension and is arranged parallel to the length direction of the mounting plate.

[0030] The first drive block is connected to one end of the second extension. The first drive block is V-shaped, and its two ends abut against the opposite sides of the two connecting pieces.

[0031] The second driving block is located on the other side of the second extension. The second driving block is trapezoidal, and its narrower end is located between the two connecting pieces and abuts against the opposite side of the two connecting pieces. One end of the reset spring is connected to one end of the sliding block, and the other end abuts against the side wall of the second slide groove. The reset spring is located on the side close to the first drive block.

[0032] The sliding block can slide along the second groove between a first position and a second position. When the sliding block slides to the first position, the first driving block interacts with the two connecting pieces to drive the two arc-shaped pieces to move closer together to the closed state. At this time, the reset spring is in the extended state. When the sliding block slides to the second position, the second driving block interacts with the two connecting pieces to drive the two arc-shaped pieces to move away from each other to the open state. At this time, the reset spring is in the contracted state.

[0033] According to one embodiment of the present invention, the pusher includes a receiving part, a pushing part, and an adjusting screw.

[0034] The storage section is located at the upper end of one side of the fixing plate, and the end of the storage section is provided with a storage groove that extends toward one side of the fixing plate.

[0035] One end of the pusher can be retractably inserted into the storage slot.

[0036] The other side of the fixing plate is provided with a threaded hole. The threaded hole and the storage groove are arranged opposite to each other and pass through the storage groove. The adjusting screw is assembled in the threaded hole, and its end is rotatably connected to one end of the push part.

[0037] According to one embodiment of the present invention, a first limiting ring is provided on both sides of the end of the pushing part, one end of the first fixing band is connected to one of the first limiting rings, and the other end of the first fixing band passes through the other first limiting ring and is folded back and fixed to the surface of the first fixing band itself.

[0038] According to one embodiment of the present invention, a second limiting ring is provided on both sides of the fixing plate, one end of the second fixing strap is connected to one of the second limiting rings, and the other end of the second fixing strap passes through the other second limiting ring and is folded back and fixed to the surface of the second fixing strap itself.

[0039] According to one embodiment of the present invention, a sliding block is provided at the lower end of one side of the fixing plate to increase the friction between the ultrasonic probe and the fixing plate.

[0040] According to one embodiment of the present invention, a groove is provided in the middle of the side opposite to the fixed plate and the ultrasonic probe.

[0041] According to an embodiment of the present invention, a mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins of the lower extremities is provided. By forcibly limiting the extension line of the needle insertion channel axis and the cut surface of the ultrasound probe to the same plane, and combined with an adjustable angle adjustment frame, it ensures that the puncture needle always travels along the ultrasound cut surface, realizing real-time and precise in-plane puncture navigation during the operation, significantly reducing the number of times the needle tip deviates from the cut surface, thereby improving the success rate of puncture on the first attempt.

[0042] Meanwhile, the probe handle is fixed to the end of the retractable pusher by the first fixing strap, and the probe head is fixed to one side of the fixing plate by the second fixing strap. The pusher is retractable to adapt to handles of different shapes, so that the connection between the probe and the fixing plate is firm, effectively preventing the device from shifting due to hand tremors or traction during the operation, and ensuring the stability of the navigation reference.

[0043] The angle adjustment frame can slide and adjust along the height of the fixed plate, and the angle between the needle insertion component and the fixed plate is adjustable. This allows for flexible adjustment of the puncture angle and height according to the depth, course, and different positions of the puncture point of the patient's vein, adapting to patients with different body types and anatomical conditions, and expanding the applicability of the device.

[0044] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0046] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure from another angle in an embodiment of the present invention; Figure 3 This is a schematic diagram of the overall structure of the angle adjustment frame in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the overall structure of the angle adjustment frame in an embodiment of the present invention; Figure 5 This is a schematic diagram of the overall structure of the opening and closing component in an embodiment of the present invention; Figure 6 This is a schematic diagram of the overall structure of the opening and closing component in an embodiment of the present invention from another angle; Figure 7 This is a schematic diagram of the overall structure of the fixing plate in an embodiment of the present invention; Figure 8 This is a schematic diagram of the overall structure of the fixing plate in an embodiment of the present invention from another angle; Figure 9 This is a cross-sectional view of the overall structure of the fixing plate in an embodiment of the present invention; Figure 10 This is a schematic diagram of the overall structure of the needle insertion assembly in an embodiment of the present invention; Figure 11 This is a schematic diagram of the overall structure in an embodiment of the present invention.

[0047] Icon labels: Ultrasonic probe 100; Fixing plate 10; Pushing component 11; Storage Department 111; Storage slot 1111; 112; Adjusting screw 113; First limiting ring 114; First fixing belt 12; Second fixing belt 13; Slide rail 14; Second limiting ring 15; Anti-slip block 16; Groove 17; Angle adjustment bracket 20; Connecting plate 21; Mounting plate 22; Connecting arm 221; Connecting slot 222; First groove 223; Second groove 224; Through groove 225; Arc-shaped telescopic arm 23; First arc-shaped part 231; Second arc-shaped portion 232; Second locking screw 233; Opening and closing components 24; Slider 241; Connector block 242; First extension 2421; Second extension 2422; First drive block 243; Second drive block 244; Return spring 245; First locking screw 25; Needle insertion assembly 30; Arc-shaped piece 31; Connecting piece 32.

[0048] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0054] The following describes in detail, with reference to the accompanying drawings, a mechanical navigation device for venous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to an embodiment of the present invention.

[0055] Reference Figures 1 to 11 As shown in the embodiment of the present invention, a mechanical navigation device for venous puncture during endovenous thermal ablation of varicose veins of the lower extremities includes a fixation plate 10, a first fixation strap 12, a second fixation strap 13, an angle adjustment frame 20, and a needle insertion assembly 30.

[0056] The upper side of one side of the fixing plate 10 is provided with a retractable pusher 11, which is suitable for pushing against one side of the handle of the ultrasonic probe 100.

[0057] The first fixing strap 12 is located at the end of the pusher 11 and is used to fix the handle of the ultrasonic probe 100 at the end of the pusher 11.

[0058] The second fixing strap 13 is connected to the lower end of one side of the fixing plate 10 and is used to fix the head of the ultrasonic probe 100 to one side of the fixing plate 10.

[0059] The angle adjustment bracket 20 is located at the other end of the fixed plate 10 and can be slidably adjusted along the height direction of the fixed plate 10.

[0060] The needle insertion assembly 30 is mounted on the angle adjustment frame 20, and the angle between the needle insertion assembly 30 and the fixing plate 10 can be adjusted by the angle adjustment.

[0061] The needle insertion assembly 30 is provided with a needle insertion channel for accommodating the puncture needle, and the extension line of the axis of the needle insertion channel is in the same plane as the cross-section of the probe.

[0062] Based on the above, by forcibly confining the extension line of the needle insertion channel and the cut surface of the ultrasound probe 100 to the same plane, and combined with the adjustable angle adjustment frame 20, it is ensured that the puncture needle always travels along the ultrasound cut surface, realizing real-time and precise in-plane puncture navigation during the operation, significantly reducing the number of times the needle tip deviates from the cut surface, thereby improving the success rate of puncture on the first attempt.

[0063] Meanwhile, the probe handle is fixed to the end of the retractable pusher 11 by the first fixing strap 12, and the probe head is fixed to one side of the fixing plate 10 by the second fixing strap 13. The pusher 11 is retractable to adapt to handles of different shapes, so that the connection between the probe and the fixing plate 10 is firm, effectively preventing the device from shifting due to hand tremors or traction during the operation, ensuring the stability of the navigation reference. The pusher 11 can also keep the ultrasound probe 100 and the fixing plate 10 in a relatively parallel state.

[0064] The angle adjustment frame 20 can be slidably adjusted along the height direction of the fixed plate 10, and the angle between the needle insertion component 30 and the fixed plate 10 is adjustable. This allows for flexible adjustment of the puncture angle and height according to the depth, course, and different positions of the puncture point of the patient's vein, adapting to patients with different body types and anatomical conditions, and expanding the applicability of the device.

[0065] Preferably, in one embodiment of the present invention, the angle adjustment frame 20 includes a connecting plate 21, a mounting plate 22, an opening and closing assembly 24, and a first locking screw 25.

[0066] The other side of the fixing plate 10 is provided with a slide rail 14 along its own height direction, and the connecting plate 21 is slidably disposed on the slide rail 14.

[0067] The lower end of the mounting plate 22 is provided with a connecting arm 221, the distal end of the connecting arm 221 is rotatably connected to the lower end of the connecting plate 21, the upper end of the mounting plate 22 is provided with an arc telescopic arm 23, the distal end of the arc telescopic arm 23 is connected to the upper end of the connecting plate 21, and the needle insertion assembly 30 is located on the side of the mounting plate 22 away from the connecting plate 21.

[0068] The opening and closing component 24 is disposed on the connecting plate 21 and is used to control the opening and closing of the needle insertion component 30 so that the needle insertion channel can switch between opening and closing, making it convenient for the needle insertion component 30 to be separated after the puncture needle is inserted.

[0069] The first locking screw 25 is provided on the connecting plate 21 to lock the position of the connecting plate 21.

[0070] Thus, by sliding the connecting plate 21 on the slide rail 14 on the side of the fixed plate 10 and locking it with the first locking screw 25, the overall height of the needle insertion assembly 30 can be continuously adjusted. This allows the device to be adjusted according to the depth of the patient's vein and the actual position of the puncture point on the body surface, ensuring that the needle insertion channel is always aligned with the target blood vessel, thus improving adaptability to different patients. The lower end of the mounting plate 22 is rotatably connected to the connecting plate 21 via the connecting arm 221, and the upper end is connected to the connecting plate 21 via the arc-shaped telescopic arm 23, forming a stable angle adjustment mechanism. By adjusting the extension length of the arc-shaped telescopic arm 23, the angle between the needle insertion assembly 30 and the fixed plate 10 can be precisely changed and reliably maintained. This allows the operator to set the optimal needle insertion angle according to the direction of the vein, further improving the accuracy of navigation. Correspondingly, corresponding angle scale markings can also be set on the arc-shaped telescopic arm 23 to facilitate medical personnel in quickly determining the needle insertion angle.

[0071] Meanwhile, an opening / closing component 24 is provided on the connecting plate 21 to control the opening / closing state of the needle insertion component 30. After puncture, the needle insertion channel can be changed from a closed state to an open state, allowing the device to be easily separated from the puncture needle without having to pull the puncture needle out of the channel in reverse. This avoids secondary damage to blood vessels or surrounding tissues that may be caused during needle withdrawal, simplifies the operation process, and shortens the operation time.

[0072] Preferably, in one embodiment of the present invention, the arc telescopic arm 23 includes a first arc-shaped portion 231, a second arc-shaped portion 232, and a second locking screw 233.

[0073] One end of the first arc-shaped portion 231 is connected to the connecting plate 21, and the first arc-shaped portion 231 has a hollow structure.

[0074] One end of the second arc-shaped portion 232 is connected to the mounting plate 22, and the other end is inserted into the first arc-shaped portion 231 by the other end of the first arc-shaped portion 231, and can be extended and retracted.

[0075] The second locking screw 233 is disposed on the first arc-shaped portion 231 to lock the insertion depth of the second arc-shaped portion 232.

[0076] Thus, both the first arc-shaped portion 231 and the second arc-shaped portion 232 are arc-shaped structures. When the second arc-shaped portion 232 extends and retracts along the inner cavity of the first arc-shaped portion 231, its movement trajectory is strictly limited to a predetermined arc. This ensures that the angle change between the mounting plate 22 and the connecting plate 21 always occurs along the same center and radius, guaranteeing that the axis of the needle insertion channel will not drift laterally during angle adjustment and will always maintain a stable coplanar relationship with the tangent plane of the ultrasound probe 100, thereby improving the accuracy of navigation. The second arc-shaped portion 232 can continuously extend and retract within the first arc-shaped portion 231 without being limited by a fixed position, allowing for precise adjustment of any angle according to the patient's vein depth, subcutaneous fat thickness, and puncture site. After locking with the second locking screw 233, the required angle can be stably maintained, meeting the personalized needs of different individuals and different surgical procedures.

[0077] Preferably, in one embodiment of the present invention, the needle insertion assembly 30 includes two arc-shaped pieces 31 and two connecting pieces 32.

[0078] The two arc-shaped pieces 31 are arranged opposite to each other, and the needle insertion channel for accommodating the puncture needle is defined between the two arc-shaped pieces 31.

[0079] The two connecting pieces 32 are connected to the two arc-shaped pieces 31 in a one-to-one correspondence.

[0080] The mounting plate 22 has a connecting groove 222 on the side opposite to the connecting plate 21. The left and right walls of the connecting groove 222 are each provided with a first sliding groove 223. The first sliding groove 223 extends in the front-back direction. The upper ends of the two connecting pieces 32 are slidably connected to the first sliding groove 223. The lower end of the opening and closing component 24 is in contact with the two connecting pieces 32 to drive the two connecting pieces 32 to move the two arc-shaped pieces 31 relative to each other, so that the needle insertion channels on the two arc-shaped pieces 31 can be switched between the open state and the closed state.

[0081] Thus, when the two opposing arc-shaped plates 31 close together, a complete needle insertion channel is formed. The opening and closing assembly 24 drives the two connecting plates 32 to move the two arc-shaped plates 31 relative to each other, allowing the needle insertion channel to freely switch between closed and open states. After puncture, there is no need to pull the puncture needle out of the needle insertion channel in reverse; simply opening the channel separates the device from the needle body, thus avoiding secondary damage to the blood vessel wall or surrounding tissues during needle withdrawal and simplifying the operation.

[0082] The upper sides of the connecting piece 32 are slidably mounted in the first sliding grooves 223 on the left and right sides of the connecting groove 222 of the mounting plate 22. The first sliding grooves 223 extend in the front-back direction, providing a stable linear movement trajectory for the connecting piece 32. Compared with a guideless cantilever structure, this design ensures that the two arc-shaped pieces 31 are always parallel and aligned when moving relative to each other, and the coaxiality of the needle insertion channel is high after closing, thus ensuring the accuracy of the puncture path.

[0083] Preferably, in one embodiment of the present invention, the opening and closing component 24 includes a sliding block 241, a connecting block 242, a first driving block 243, a second driving block 244, and a return spring 245.

[0084] The mounting plate 22 is provided with a second sliding groove 224 on the side near the connecting plate 21. The second sliding groove 224 extends along the length direction of the mounting plate 22. The sliding block 241 is slidably disposed in the second sliding groove 224. The bottom of the second sliding groove 224 is provided with a through groove 225 that extends through to the connecting groove 222.

[0085] The connecting block 242 includes a first extension 2421 and a second extension 2422. The first extension 2421 passes through the through groove 225. The upper end of the first extension 2421 is connected to the sliding block 241. The lower end of the first extension 2421 extends between the two connecting pieces 32. The second extension 2422 is connected to the lower end of the first extension 2421 and is arranged parallel to the length direction of the mounting plate 22.

[0086] The first drive block 243 is connected to one end of the second extension 2422. The first drive block 243 is V-shaped, and the two ends of the first drive block 243 abut against the opposite sides of the two connecting pieces 32.

[0087] The second driving block 244 is disposed on the other side of the second extension 2422. The second driving block 244 is trapezoidal, and the narrower end is located between the two connecting pieces 32 and abuts against the opposite side of the two connecting pieces 32. One end of the reset spring 245 is connected to one end of the sliding block 241, and the other end abuts against the side wall of the second slide groove 224. The reset spring 245 is located on the side close to the first drive block 243.

[0088] The sliding block 241 can slide along the second sliding groove 224 between a first position and a second position. When the sliding block 241 slides to the first position, the first driving block 243 interacts with the two connecting pieces 32 to drive the two arc-shaped pieces 31 to move closer together to the closed state. At this time, the return spring 245 is in the extended state. When the sliding block 241 slides to the second position, the second driving block 244 interacts with the two connecting pieces 32 to drive the two arc-shaped pieces 31 to move away from each other to the open state. At this time, the return spring 245 is in the contracted state.

[0089] Thus, by sliding block 241 driving connecting block 242 to slide between the first and second positions, the "V"-shaped first driving block 243 abuts against the two connecting pieces 32 from the outside, causing them to move closer together (closing the needle inlet channel); the trapezoidal second driving block 244 opens the two connecting pieces 32 from the inside, causing them to move away from each other (opening the needle inlet channel). One set of sliding components can simultaneously complete the two opposite actions of "closing" and "opening," resulting in high structural integration and clear control logic. The reset spring 245 is located near the first driving block 243. When sliding block 241 is in the first position (closed state), the spring extends, and its elasticity helps to keep the two arc-shaped pieces 31 in a stable closed state, preventing accidental opening due to accidental contact or vibration; when sliding block 241 slides to the second position (open state), the spring is compressed, and after being released, it can automatically pull sliding block 241 back to the first position, so that the device is preferentially kept closed in the non-operating state.

[0090] Meanwhile, because the two ends of the "V"-shaped first driving block 243 symmetrically abut against the opposite sides of the two connecting pieces 32, an inward component force is generated during sliding, causing the two connecting pieces 32 to move closer together evenly; the narrower end of the trapezoidal second driving block 244 is inserted between the two connecting pieces 32, and the inclined surface gradually opens the connecting pieces 32 during sliding, resulting in smooth force application and no impact. Both driving methods avoid rigid collisions, and the opening and closing actions are gentle and smooth, reducing wear on the arc-shaped piece 31 and the connecting piece 32.

[0091] Preferably, in one embodiment of the present invention, the pusher 11 includes a storage part 111, a pusher part 112, and a top adjusting screw 113.

[0092] The storage part 111 is located at the upper end of one side of the fixing plate 10, and the end of the storage part 111 is provided with a storage groove 1111, which extends toward one side of the fixing plate 10.

[0093] One end of the pusher 112 is retractably inserted into the storage slot 1111.

[0094] The other side of the fixing plate 10 is provided with a threaded hole. The threaded hole and the storage groove 1111 are arranged opposite to each other and pass through the storage groove 1111. The top adjusting screw 113 is assembled in the threaded hole, and its end is rotatably connected to one end of the push part 112.

[0095] Thus, since one end of the push-up part 112 is inserted into the storage groove 1111 of the storage part 111, its extension length can be controlled by the top adjusting screw 113, thereby adapting to the width and curved shape of the handles of different brands and models of ultrasound probes 100. Regardless of whether the handle is thick or thin, the end of the push-up part 112 can be effectively pushed against one side of the handle, forming a stable clamping with the first fixing strap 12, expanding the versatility of the device, and ensuring that the ultrasound probe 100 and the fixing plate 10 remain relatively parallel. The top adjusting screw 113 is fitted into the threaded hole of the fixing plate 10. When rotated, it pushes the push-up part 112 to extend and retract along the storage groove 1111, providing stepless continuous adjustment capability. Doctors can precisely control the extension distance of the push-up part 112 according to actual needs, so that the handle of the ultrasound probe 100 is precisely fixed in the predetermined posture, neither too loose to cause shaking, nor too tight to cause deformation of the handle or damage to the probe, improving the accuracy and safety of fixation. The end of the top adjusting screw 113 is rotatably connected to one end of the push part 112 (e.g., through a retaining ring or bearing structure). When the top adjusting screw 113 is rotated, the screw itself rotates but the push part 112 does not rotate with it. It only moves linearly along the receiving groove 1111, making the adjustment process more effortless and smooth.

[0096] Preferably, in one embodiment of the present invention, a first limiting ring 114 is provided on both sides of the end of the pushing part 112, one end of the first fixing band 12 is connected to one of the first limiting rings 114, and the other end of the first fixing band 12 passes through the other first limiting ring 114 and is folded back and fixed to the surface of the first fixing band 12 itself.

[0097] Thus, one end of the first fixing strap 12 is fixed to a first limiting ring 114, and the other end passes through another first limiting ring 114 and folds back to be fixed to its own surface. The fixing strap then wraps around the end of the push-up part 112, forming a retractable loop structure. After the fixing strap wraps around the probe handle, the handle can be securely bound to the end of the push-up part 112 by pulling the folded end. Compared to single-point adhesive or single-loop connection, the fixation is more reliable and effectively prevents the probe handle from slipping during surgery. Because the first fixing strap 12 uses a self-fixing method after folding back (e.g., Velcro or buckles), the operator can flexibly adjust the effective length of the fixing strap according to the actual circumference of the probe handle. Regardless of whether the handle is thin or thick, a tight fit can be achieved, avoiding the problem of the fixing strap being too long and loose or too short and unable to be fastened, thus improving the versatility of the device.

[0098] Preferably, in one embodiment of the present invention, the fixing plate 10 is provided with a second limiting ring 15 on both sides, one end of the second fixing strap 13 is connected to one of the second limiting rings 15, and the other end of the second fixing strap 13 passes through the other second limiting ring 15 and is folded back and fixed to the surface of the second fixing strap 13 itself.

[0099] Thus, by fixing one end of the second fixing band 13 to a second limiting ring 15, and passing the other end through another second limiting ring 15 and folding it back to fix it to its own surface, a retractable annular band is formed between one side of the fixing plate 10 and the probe head. This allows the probe head to be pressed more evenly against the side of the fixing plate 10, effectively preventing the probe head from loosening or tilting during the operation and ensuring the stability of the navigation reference.

[0100] Advantageously, an anti-slip layer can be provided on the inner wall of both the first fixing band 12 and the second fixing band 13, which improves the fixing effect.

[0101] Preferably, in one embodiment of the present invention, a sliding block 16 is provided at the lower end of one side of the fixing plate 10 to increase the friction between the ultrasonic probe 100 and the fixing plate 10.

[0102] Thus, by providing anti-slip blocks 16 (such as rubber pads, silicone strips, or dotted protrusions) on the side of the fixing plate 10 that contacts the head of the ultrasound probe 100, the coefficient of friction between the two is significantly increased. After being tightened with the second fixing strap 13, the anti-slip blocks 16 can firmly lock the position of the probe head, and even if it is pushed or vibrated during the operation, it is not easy to slip longitudinally or laterally, thereby ensuring that the positioning reference of the navigation device remains stable.

[0103] Preferably, in one embodiment of the present invention, a groove 17 is provided in the middle of the side opposite to the fixed plate 10 and the ultrasonic probe 100.

[0104] Thus, by providing a groove 17 in the middle of the side of the fixing plate 10 that contacts the head of the ultrasound probe 100, a gap is formed between the central area of ​​the probe head and the fixing plate 10. When the doctor holds the ultrasound probe 100 for scanning or puncture guidance, the fingers holding the handle can naturally extend into this gap, avoiding the problem of the fixing plate 10 directly pressing against the middle of the probe, which would cause the fingers to be squeezed or unable to hold comfortably.

[0105] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0106] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities, characterized in that, include: A fixing plate, wherein a retractable pusher is provided on the upper end of one side of the fixing plate, which is suitable for pushing against one side of the handle of the ultrasonic probe; A first fixing strap is provided at the end of the pusher and is used to fix the handle of the ultrasonic probe at the end of the pusher. The second fixing strap is connected to the lower end of one side of the fixing plate and is used to fix the head of the ultrasonic probe to one side of the fixing plate. An angle adjustment bracket is mounted at the other end of the fixed plate and can be slidably adjusted along the height direction of the fixed plate. A needle insertion assembly is mounted on the angle adjustment frame, and the angle between the needle insertion assembly and the fixed plate can be adjusted by the angle adjustment. The needle insertion assembly is provided with a needle insertion channel for accommodating the puncture needle, and the extension line of the axis of the needle insertion channel is in the same plane as the cross-section of the probe.

2. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 1, characterized in that, The angle adjustment bracket includes: A connecting plate is provided with a slide rail on the other side of the fixed plate along its own height direction, and the connecting plate is slidably disposed on the slide rail; The mounting plate has a connecting arm at its lower end, the distal end of which is rotatably connected to the lower end of the connecting plate. The mounting plate has an arc-shaped telescopic arm at its upper end, the distal end of which is connected to the upper end of the connecting plate. The needle insertion assembly is located on the side of the mounting plate opposite to the connecting plate. An opening and closing assembly is provided on the connecting plate to control the opening and closing of the needle insertion assembly, so that the needle insertion channel can switch between opening and closing, making it convenient for the needle insertion assembly to be separated after the puncture needle is inserted. The first locking screw is located on the connecting plate and is used to lock the position of the connecting plate.

3. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 2, characterized in that, The arc-shaped telescopic arm includes: The first arc-shaped portion has one end connected to the connecting plate and is a hollow structure. The second arc-shaped part has one end connected to the mounting plate, and the other end inserted into the first arc-shaped part by the other end of the first arc-shaped part, and can be extended and retracted. The second locking screw is located on the first arc-shaped portion and is used to lock the insertion depth of the second arc-shaped portion.

4. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 2, characterized in that, The needle insertion assembly includes: Two arc-shaped plates are arranged opposite each other, and a needle insertion channel for accommodating a puncture needle is defined between the two arc-shaped plates; Two connecting pieces are connected to the two arc-shaped pieces in a one-to-one correspondence; The mounting plate has a connecting groove on the side opposite to the connecting plate. The left and right walls of the connecting groove are each provided with a first sliding groove. The first sliding groove extends in the front-back direction. The upper ends of the two connecting pieces are slidably connected to the first sliding grooves. The lower end of the opening and closing component contacts the two connecting pieces to drive the two connecting pieces to move the two arc-shaped pieces relative to each other, so that the needle insertion channels on the two arc-shaped pieces can be switched between an open state and a closed state.

5. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 4, characterized in that, The opening and closing component includes: The sliding block has a second sliding groove on the side of the mounting plate near the connecting plate. The second sliding groove extends along the length of the mounting plate. The sliding block is slidably disposed in the second sliding groove. The bottom of the second sliding groove has a through groove that extends to the connecting groove. The connecting block includes a first extension and a second extension. The first extension passes through the through groove. The upper end of the first extension is connected to the sliding block. The lower end of the first extension extends between the two connecting pieces. The second extension is connected to the lower end of the first extension and is arranged parallel to the length direction of the mounting plate. The first driving block is connected to one end of the second extension. The first driving block is "V" shaped, and its two ends abut against the opposite sides of the two connecting pieces. The second driving block is located on the other side of the second extension. The second driving block is trapezoidal, and its narrower end is located between the two connecting pieces and abuts against the opposite side of the two connecting pieces. A return spring, one end of which is connected to one end of the sliding block, and the other end abutting against the side wall of the second slide groove, the return spring being located near the first driving block; The sliding block can slide along the second groove between a first position and a second position. When the sliding block slides to the first position, the first driving block interacts with the two connecting pieces to drive the two arc-shaped pieces to move closer together to the closed state. At this time, the reset spring is in the extended state. When the sliding block slides to the second position, the second driving block interacts with the two connecting pieces to drive the two arc-shaped pieces to move away from each other to the open state. At this time, the reset spring is in the contracted state.

6. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 1, characterized in that, The pusher includes: A storage section is provided at the upper end of one side of the fixing plate, and a storage groove is provided at the end of the storage section, which extends toward one side of the fixing plate. A push-out part, one end of which is retractably inserted into the storage slot; The adjusting screw has a threaded hole on the other side of the fixing plate. The threaded hole is opposite to the storage groove and extends into the storage groove. The adjusting screw is fitted into the threaded hole, and its end is rotatably connected to one end of the push part.

7. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 6, characterized in that, Both sides of the end of the pusher are provided with first limiting rings. One end of the first fixing belt is connected to one of the first limiting rings, and the other end of the first fixing belt passes through the other first limiting ring and is folded back and fixed to the surface of the first fixing belt itself.

8. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 1, characterized in that, The fixing plate is provided with a second limiting ring on both sides. One end of the second fixing strap is connected to one of the second limiting rings, and the other end of the second fixing strap passes through the other second limiting ring and is folded back and fixed to the surface of the second fixing strap itself.

9. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 1, characterized in that, The lower end of one side of the fixing plate is provided with an anti-slip block to increase the friction between the ultrasonic probe and the fixing plate.

10. The mechanical navigation device for intravenous puncture during endovenous thermal ablation of varicose veins in the lower extremities according to claim 1, characterized in that, The fixing plate and the ultrasonic probe are provided with a groove in the middle of the opposite side.

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