Reverse penetrating guide wire capturing device

Abstract

The utility model relates to the field of medical instruments, in particular to a reverse-penetrating guide wire capturing device. Comprising a catheter, a push rod and a plurality of cage-shaped components used for being inserted or penetrated by reverse penetrating guide wires. The plurality of cage-shaped components are configured into connecting structures which are sequentially spaced and connected along the strip-shaped path, the plurality of cage-shaped components are provided with tail ends close to the push rod and head ends far away from the push rod, the push rod is connected to the tail ends, and the guide pipe is arranged on the push rod in a sleeving manner; each cage-shaped part has a first state located in the guide pipe and a second state located outside the guide pipe, and the push rod is used for driving each cage-shaped part to be converted between the first state and the second state. According to the reverse-penetrating guide wire capturing device, the action of withdrawing the reverse-penetrating guide wire is avoided, the time corresponding to the withdrawing action is shortened, and the path length of inserting the guide wire into at least one cage-shaped component again and the time corresponding to inserting the guide wire into the cage-shaped component are shortened.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically a reverse-passing guide wire grasping device. Background Technology

[0002] In the prior art, a patent document entitled "A Guide Wire Grabbing Device" with application number 201811132125.4 is disclosed. In this prior art, a mesh grabbing mechanism connected to a mandrel is specifically disclosed. The mesh grabbing mechanism can expand and unfold into a mesh or stretch into a long strip. This facilitates the guide wire to penetrate into the mesh grabbing mechanism. When the mesh grabbing mechanism is stretched into a long strip, the internal space becomes smaller, constraining and clamping the guide wire inside the mesh structure. Then, the mandrel fixed to the mesh grabbing mechanism is pulled, causing the mesh grabbing mechanism to move, thereby driving the guide wire to move into the guiding catheter and successfully achieving the technical solution of connecting the guide wire and the guiding catheter.

[0003] However, the aforementioned existing guidewire grasping device suffers from low operational efficiency in practical applications. Specifically, during the insertion of the guidewire into the mesh grasping mechanism, the guidewire often flips over the mesh grasping mechanism, meaning it is not inserted into the mesh grasping mechanism. This forces medical personnel to retract the guidewire away from the mesh grasping mechanism before re-inserting it. In actual use, medical personnel frequently have to perform the actions of retracting and inserting the guidewire multiple times, resulting in the aforementioned existing guidewire grasping device being time-consuming and inefficient to operate.

[0004] Therefore, improving the operational efficiency of existing wire-grabbing devices has become a technical problem to be solved. Utility Model Content

[0005] To address the technical problem of improving the operational efficiency of existing wire-grabbing devices, this invention provides a reverse-threaded wire-grabbing device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] According to one aspect of the present invention, a reverse-through guide wire grasping device is provided, comprising a guide tube, a push rod, and a plurality of cage-like components for insertion or penetration by the reverse-through guide wire;

[0008] The plurality of cage-like components are configured as a sequentially spaced and connected connection structure along a strip path, wherein the plurality of cage-like components have a tail end near the push rod and a head end away from the push rod, the push rod being connected to the tail end, and the conduit being sleeved on the push rod;

[0009] Each of the cage-like components has a first state located inside the conduit and a second state located outside the conduit, and the push rod is used to drive each of the cage-like components to switch between the first state and the second state.

[0010] Furthermore, each of the cage-like components is made of at least three ribs, each rib being configured in a zigzag shape, with at least one capture hole formed between any two adjacent ribs, and any one of the capture holes being used for insertion or penetration by the reverse guide wire.

[0011] Furthermore, each of the cage-like components has the same diameter;

[0012] Alternatively, along the direction from the head end to the tail end, the diameter of the preceding cage-like component is smaller than the diameter of the following cage-like component.

[0013] Furthermore, a clock scale for reference is established in the circumferential direction of the push rod, with the axis of the push rod as the center line;

[0014] The clock scales pointed to by the capture holes of all the cage-like components are interconnected;

[0015] Alternatively, the capture holes of any two adjacent cage-like components point to different clock scales.

[0016] Furthermore, when the cage-like component is in the first state, the diameter of the cage-like component is less than or equal to the inner diameter of the conduit;

[0017] When the cage-like component is in the second state, the diameter of the cage-like component is larger than the outer diameter of the conduit.

[0018] Furthermore, it also includes multiple connection segments;

[0019] A cage-like component is disposed between two adjacent connecting segments, and the connecting segments are welded to the cage-like component;

[0020] The connecting segment is provided with a strip-shaped groove, which is recessed into the circumferential surface of the connecting segment and extends along the circumferential direction of the circumferential surface.

[0021] Alternatively, the connecting segment may be provided with a spiral groove, which is recessed into the circumferential surface of the connecting segment.

[0022] Furthermore, it also includes a core wire and a head end spring, the head end spring being connected to the head end via the core wire, wherein the two ends of the head end spring away from the core wire are respectively provided with ball heads.

[0023] Furthermore, it also includes a tail-end coiled spring;

[0024] A portion of the push rod connected to the tail end is defined as a mounting section. The mounting section is converging along the direction from the head end to the tail end. The tail end spring is sleeved on the mounting section. Heat shrink tubing is wrapped around the tail end spring, the mounting section, and the dragon-shaped component located at the tail end between the mounting section and the mounting section.

[0025] Furthermore, the push rod is provided with multiple markings;

[0026] The two ends of the conduit are a head end and a tail end, respectively, wherein a plurality of cage-like components are located at the head end and a plurality of markings are located at the tail end.

[0027] The position of any of the marks relative to the end port is matched with the position of one of the cage-like components relative to the head port, wherein when any of the marks is obscured by the conduit, the cage-like component matching the obscured mark is exposed outside the conduit.

[0028] Furthermore, at least one imaging structure for display in X-ray images is provided in the cage-like component or between two adjacent cage-like components;

[0029] The developing structure is at least one of the following: a developing coating, a platinum developing spot, and a developing polymer tubing.

[0030] The above technical solution has the following advantages or beneficial effects:

[0031] This utility model provides a reverse-thread guide wire grasping device, which is equipped with multiple cage-like components. During the process of the reverse-thread guide wire being inserted into or penetrating the grasping hole of a prior cage-like component, if the reverse-thread guide wire crosses the grasping hole outside its outline, it can then be inserted into or penetrated into the grasping hole of a subsequent cage-like component. Compared to the prior art, this utility model's reverse-thread guide wire grasping device avoids the need to retract the reverse-thread guide wire, reduces the time required for retraction, and reduces the path length and time required for re-insertion into at least one cage-like component. Therefore, the operating efficiency of this utility model's reverse-thread guide wire grasping device is higher than that of existing guide wire grasping devices. Attached Figure Description

[0032] Figure 1 A schematic diagram of the structure of a reverse-threaded guide wire grasping device provided in an embodiment of this utility model;

[0033] Figure 2 A schematic diagram of the structure of a reverse-threaded guide wire grasping device provided in an embodiment of this utility model;

[0034] Figure 3 A schematic diagram of the structure of a reverse-threaded guide wire grasping device provided in an embodiment of this utility model;

[0035] Figure 4 A schematic diagram of the structure of a reverse-threaded guide wire grasping device provided in an embodiment of this utility model;

[0036] Figure 5 A reverse guide wire catching device, a reverse guide wire, and a diseased blood vessel position diagram provided for an embodiment of this utility model;

[0037] Figure 6 This is a schematic diagram of the cage-like component provided in an embodiment of the present utility model;

[0038] Figure 7 This is a schematic diagram of the cage-like component provided in an embodiment of the present utility model;

[0039] Figure 8 A schematic diagram of the structure of a reverse-threaded guide wire grasping device provided in an embodiment of this utility model;

[0040] Figure 9 A schematic diagram of the structure of a reverse-threaded guide wire grasping device provided in an embodiment of this utility model;

[0041] Figure 10 A schematic diagram of the structure of a reverse-threaded guide wire grasping device provided in an embodiment of this utility model;

[0042] Figure 11 This is a schematic diagram of the cage-like component provided in an embodiment of the present utility model. Detailed Implementation

[0043] Example 1:

[0044] In this embodiment, a reverse-thread guide wire grasping device is provided to solve the technical problem of how to improve the operating efficiency of existing guide wire grasping devices.

[0045] For details, see Figures 1 to 5 The reverse guide wire B1 capture device of this embodiment includes a guide tube 1, a push rod 2 and a plurality of cage-like components 3 for being inserted or penetrated by the reverse guide wire B1.

[0046] Multiple cage-like components 3 are configured as a sequentially spaced and connected connection structure along a strip path, wherein the multiple cage-like components 3 have a tail end A2 near the push rod 2 and a head end A1 away from the push rod 2, the push rod 2 is connected to the tail end A2, and the conduit 1 is sleeved on the push rod 2.

[0047] Each cage-like component 3 has a first state located within the conduit 1 (see...) Figure 2 ) and the second state located outside catheter 1 (see Figure 4 The push rod 2 is used to drive each cage-like component 3 to switch between the first state and the second state.

[0048] The cage-like component 3 has the characteristic of self-expansion. When the cage-like component 3 is located inside the conduit 1 and is in the first state, the cage-like component 3 is restricted by the inner wall of the conduit 1 and compressed into a strip with a relatively long axial direction and a relatively short radial direction. When the cage-like component 3 changes from the first state located inside the conduit 1 to the second state located outside the conduit 1, the cage-like component 3 expands into a cage with a relatively short axial direction and a relatively long radial direction through its self-expansion characteristic.

[0049] See Figure 1 , Figure 2 or Figure 4 When the cage-shaped component 3 is cage-shaped, multiple capture holes 301 are formed on the cage-shaped component 3 for insertion or penetration by the reverse guide wire B1. The minimum width of the capture hole 301 is greater than the diameter of the reverse guide wire B1, thereby facilitating the insertion or penetration of the reverse guide wire B1 into the capture hole 301. Conversely, when the cage-shaped component 3 is strip-shaped, the minimum width of the capture hole 301 can reach zero.

[0050] For details, see Figure 6 or Figure 7 or Figure 11 In this embodiment, each cage-like component 3 is made of at least three ribs 302, each rib 302 is configured to be zigzag, and at least one capture hole 301 is formed between any two adjacent ribs 302. Any capture hole 301 is used to be inserted or penetrated by the reverse guide wire B1.

[0051] The ribs 302 of the cage-like component 3 are made of medical-grade metal materials, including but not limited to nickel-titanium alloys. Utilizing the inherent elasticity of the medical-grade metal materials, the cage-like component 3 can achieve its self-expansion characteristic.

[0052] Each cage-like component 3 is made of at least three ribs 302, which results in the following two configurations:

[0053] For the first setup method, please refer to [link / reference]. Figure 11 In each cage-like component 3, any two adjacent ribs 302 do not intersect each other, thus forming only one capture hole 301 between any two adjacent ribs 302. If the cage-like component 3 is made of only three ribs 302 according to the first arrangement, then the cage-like component 3 has three capture holes 301. Similarly, if the cage-like component 3 is made of only four ribs 302 according to the first arrangement, then the cage-like component 3 has four capture holes 301. And so on. If the cage-like component 3 is composed of five, six, or even more ribs 302, then the number of capture holes 301 in the cage-like component 3 is the same as the number of ribs 302 in the cage-like component 3.

[0054] For the second setup method, please refer to [link / reference]. Figure 1 or Figure 4 or Figure 6 or Figure 7 In each cage-like component 3, any two adjacent ribs 302 intersect each other, thus forming two capture holes 301 between any two adjacent ribs 302. In this arrangement, the number of ribs 302 in the cage-like component 3 should not be too many, such as 3, 4 or 5, otherwise it will affect the minimum width of the capture hole 301. Under the condition that the minimum width of the capture hole 301 is close to and slightly larger than the diameter of the reverse guide wire B1, it is not convenient to insert the reverse guide wire B1 into the capture hole 301.

[0055] In this embodiment, the cage-like component 3 is preferably manufactured using the first configuration method described above.

[0056] In this embodiment, the cage-like component 3 can be made by tubing cutting or by wire weaving. These are common knowledge known to those skilled in the art, and will not be elaborated here.

[0057] See Figure 5 Before using the reverse guide wire B1 capture device in this embodiment, medical staff select two puncture sites on the patient's diseased blood vessel by means of vascular puncture. The lesion in the diseased blood vessel is located between the two puncture sites. For ease of description, the two puncture sites are defined as the first puncture site C1 and the second puncture site C2, respectively.

[0058] See Figure 5 The medical staff inserts the guidewire (not shown in the figure) through the first puncture point C1 into the diseased blood vessel, so that the guidewire reaches the lesion first. Then, the catheter 1 is fitted onto the guidewire and inserted into the diseased blood vessel through the first puncture point C1, so that the catheter 1 reaches the lesion. After the guidewire and catheter 1 reach the lesion, the medical staff manipulates the guidewire and catheter 1 to move alternately, so that the guidewire and catheter 1 move in a stepping manner along the direction from the first puncture point C1 to the second puncture point C2, making a movement to insert into and penetrate the lesion until the guidewire and catheter 1 can no longer move.

[0059] See Figure 5 When the guidewire and catheter 1 are unable to move, the medical staff keep the current position of catheter 1 unchanged and withdraw the guidewire from the first puncture point C1 along the direction from the second puncture point C2 to the first puncture point C1, so that the guidewire is separated from catheter 1 and the diseased blood vessel.

[0060] See Figure 5After the guidewire is disengaged from the catheter 1 and the diseased blood vessel, the medical staff inserts multiple cage-like components 3 and push rods 2 into the catheter 1. The multiple cage-like components 3 are in front and the push rods 2 are behind along the direction from the first puncture section C1 to the second puncture section C2. Then, the medical staff pushes the push rods 2, so that the multiple cage-like components 3 move in the catheter 1 and reach the lesion location.

[0061] See Figure 5 After the multiple cage-like components 3 reach the lesion site, the medical staff keep the current positions of the multiple cage-like components 3 and the push rod 2 unchanged, and make a retraction action of the catheter 1 along the direction from the second puncture section C2 to the first puncture section C1.

[0062] When medical staff withdraw catheter 1, they have two possible options:

[0063] In the first option, medical staff release only one cage-like component 3 at a time, and terminate the withdrawal of catheter 1 after releasing one cage-like component 3.

[0064] The second option involves medical staff releasing all cage-like components 3 at once, and then terminating the withdrawal of catheter 1 after releasing all cage-like components 3.

[0065] In the first scheme, after the medical staff stops the action of withdrawing the catheter 1, the medical staff inserts the retrograde guide wire B1 into the diseased blood vessel through the second puncture part C2, so that the retrograde guide wire B1 reaches the lesion location; then, the medical staff continues to drive the retrograde guide wire B1, so that the retrograde guide wire B1 penetrates the lesion location and reaches the position of the first released cage component 3. The medical staff drives the retrograde guide wire B1, so that the retrograde guide wire B1 is gradually inserted into or penetrates the capture hole 301 of the first released cage component 3.

[0066] In the first scheme, after the medical staff confirms that the retrograde guide wire B1 has been inserted or penetrated the capture hole 301, the medical staff pushes the catheter 1, causing the catheter 1 to move along the direction from the first puncture part C1 to the second puncture part C2. The first cage-like component 3 that has been released is subjected to pressure by the opening of the catheter 1, causing the cage-like component 3 to deform, resulting in the diameter of the cage-like component 3 gradually decreasing and gradually being contained in the catheter 1.

[0067] In the first scheme, if the reverse guide wire B1 is only inserted into the capture hole 301 of the first cage-like component 3 that is released, then as the diameter of the cage-like component 3 gradually decreases, the reverse guide wire B1 is clamped by at least two ribs 302 of the cage-like component 3 and is housed in the conduit 1.

[0068] In the first scheme, if the retrograde guide wire B1 penetrates the capture hole 301 of the released first cage-like component 3, then as the diameter of the cage-like component 3 gradually decreases and as the catheter 1 moves continuously along the direction from the first puncture part C1 to the second puncture part C2, a portion of the retrograde guide wire B1 located between the released first cage-like component 3 and the catheter 1 is caught by the first cage-like component 3 and the catheter 1. Then, the caught retrograde guide wire B1 deforms and is hooked by at least one rib 302 of the first cage-like component 3. Finally, as the catheter 1 moves, the first cage-like component 3 and the retrograde guide wire B1 are housed inside the catheter 1.

[0069] In the first approach, if the retrograde guidewire B1 does not insert into or penetrate the capture hole 301 of the first released cage-like component 3, but instead crosses the capture hole 301 outside the outline of the first released cage-like component 3, then the medical staff can maintain the current position of the retrograde guidewire B1 and retract the catheter 1 again, releasing the second cage-like component 3. Then, the medical staff can drive the retrograde guidewire B1 again, inserting or penetrating it into the capture hole 301 of the second released cage-like component 3. Similarly, if the retrograde guidewire B1 does not insert into or penetrate the capture holes 301 of the first and second released cage-like components 3, but instead crosses the capture hole 301 outside the outline of the first and second released cage-like components 3 respectively... After passing the capture hole 301, the medical staff can release the third cage component 3, the fourth cage component 3, and so on, until all cage components 3 are released. In a special case, if the retrograde guide wire B1 does not insert into or penetrate the capture holes 301 of all released cage components 3, the medical staff needs to retract the retrograde guide wire B1 along the direction from the first puncture section C1 to the second puncture section C2, so that the position of the retrograde guide wire B1 is disengaged from the position of all cage components 3. Then, the medical staff drives the retrograde guide wire B1 again, so that the retrograde guide wire B1 sequentially inserts or penetrates the capture holes 301 of all cage components 3. As long as the medical staff confirms that at least one capture hole 301 of a cage component 3 has been inserted or penetrated by the retrograde guide wire B1, it is considered successful.

[0070] In the first approach, after the cage-like component 3 clamps or hooks the retrograde guidewire B1 and is housed within the catheter 1, the medical staff keeps the current position of the catheter 1 unchanged along the direction from the second puncture section C2 to the first puncture section C1, and pulls the push rod 2, causing the push rod 2 to pull all the cage-like components 3 and the retrograde guidewire B1 until all the cage-like components 3 are pulled to the outside of the catheter 1 and the diseased blood vessel, and until the retrograde guidewire B1 is exposed to the outside of the diseased blood vessel and can be observed by the medical staff.

[0071] In the second scheme, after the medical staff stops withdrawing the catheter 1, all the cage-like components 3 are released. At this time, the medical staff inserts the retrograde guidewire B1 into the diseased blood vessel through the second puncture point C2, so that the retrograde guidewire B1 reaches the lesion location. Then, the medical staff continues to drive the retrograde guidewire B1, so that the retrograde guidewire B1 penetrates the lesion location and reaches the position of the first released cage-like component 3. The medical staff continues to drive the retrograde guidewire B1, so that the retrograde guidewire B1 gradually inserts into or penetrates the capture hole 301 of the first released cage-like component 3.

[0072] In the second scheme, after the medical staff confirms that the retrograde guide wire B1 has been inserted into or penetrated the capture hole 301 of the first released cage-like component 3, the medical staff pushes the catheter 1, causing the catheter 1 to move along the direction from the first puncture part C1 to the second puncture part C2. All the released cage-like components 3 are successively subjected to pressure by the tube opening of the catheter 1, causing all the released cage-like components 3 to deform successively, so that the diameter of each cage-like component 3 gradually decreases and is gradually housed in the catheter 1.

[0073] In the second scheme, the reverse guide wire B1 has two positional and connection relationships with the rib 302 of the cage-like component 3, namely being clamped and being hooked. This is consistent with the first scheme mentioned above, where the reverse guide wire B1 has two positional and connection relationships with the rib 302 of the cage-like component 3, namely being clamped and being hooked. This will not be repeated here.

[0074] In the second approach, if the retrograde guidewire B1 does not insert into or penetrate at least one of the capture holes 301 of the released cage-like components 3, but instead crosses the capture holes 301 outside the outline of all the released cage-like components 3, then the medical staff needs to retract the retrograde guidewire B1 along the direction from the first puncture section C1 to the second puncture section C2, so that the position of the retrograde guidewire B1 is disengaged from the position of all the cage-like components 3. Then, the medical staff re-drives the retrograde guidewire B1, so that the retrograde guidewire B1 sequentially inserts into or penetrates the capture holes 301 of all the cage-like components 3, as long as the medical staff confirms that at least one capture hole 301 of the cage-like component 3 has been inserted into or penetrated by the retrograde guidewire B1.

[0075] In the prior art (the invention is entitled "A Guide Wire Grabbing Device", application number 201811132125.4), since only one mesh grabbing mechanism is provided (equivalent to a cage-like component 3 in this application), if the guide wire crosses the mesh grabbing mechanism outside the outline of the mesh grabbing mechanism during the process of grabbing the guide wire, then the medical staff can only retract the guide wire and then drive the guide wire to insert into the mesh grabbing mechanism again.

[0076] In this embodiment, a reverse-thread guide wire B1 capture device is provided with multiple cage-like components 3. During the process of the reverse-thread guide wire B1 inserting into or penetrating the capture hole 301 of a prior cage-like component 3, if the reverse-thread guide wire B1 crosses the capture hole 301 outside its outline, it can then insert or penetrate into the capture hole 301 of a subsequent cage-like component 3. Compared to the prior art described above, this embodiment's reverse-thread guide wire B1 capture device avoids the action of retracting the reverse-thread guide wire B1, reduces the time corresponding to the retraction action, and reduces the path length and time corresponding to re-insertion into at least one cage-like component 3. Therefore, the operating efficiency of this embodiment's reverse-thread guide wire B1 capture device is higher than that of a prior art guide wire capture device.

[0077] More specifically, if the aforementioned existing technology involves a retraction of the guidewire, then medical personnel also need to insert the guidewire into the mesh capture mechanism. The path of the guidewire insertion into the throne-like mechanism includes the path of the retraction of the guidewire.

[0078] Correspondingly, in this embodiment, the retrograde guidewire B1 crosses the capture hole 301 from outside the outline of the cage-like component 3. In this case, medical staff can avoid making a retraction action of the retrograde guidewire B1, saving the time of retraction. At the same time, the path of the retrograde guidewire B1 formed by the insertion or penetration action of the medical staff is shorter. This movement path does not include the "path of retraction of guidewire" as described in the prior art, thereby saving the time of the medical staff to make the insertion or penetration action.

[0079] Similarly, if the above-mentioned existing technology involves two, three, or four guidewire retraction actions, it means that medical staff retract the guidewire more times, and the path for inserting the guidewire into the mesh capture mechanism is longer, which includes at least two, three, or four "guidewire retraction paths".

[0080] Correspondingly, in this embodiment, the retrograde guidewire B1 crosses the capture hole 301 from outside the outline of the two, three, or four cage-like components 3 in one step. In this case, medical staff can avoid making two, three, or four retraction actions of the retrograde guidewire B1, saving the time of two, three, or four retraction actions of the retrograde guidewire B1. At the same time, the path of the retrograde guidewire B1 formed by the insertion or penetration action of the medical staff is shorter. This movement path does not include the two, three, or four "paths of retraction guidewire" as described in the prior art, thereby saving the time of the medical staff to make insertion or penetration actions.

[0081] Therefore, the reverse-thread guide wire B1 capture device provided in this embodiment solves the technical problem of how to improve the operating efficiency of existing guide wire capture devices.

[0082] Further, see Figure 9 or Figure 10 In this embodiment, a reverse-through guide wire B1 capture device has each cage-shaped component 3 having the same diameter.

[0083] Alternatively, along the direction from the head end A1 to the tail end A2, the diameter of the cage-like component 3 at the front is smaller than the diameter of the cage-like component 3 at the rear.

[0084] For ease of description, the technical solution in which each cage-like component 3 has the same diameter is defined as the third solution, and the solution in which the diameter of the preceding cage-like component 3 is smaller than the diameter of the following cage-like component 3 is defined as the fourth solution.

[0085] In the third option, see Figure 10 The multiple cage-like components 3 have the same diameter. On the one hand, in the actual manufacturing process of the cage-like components 3, the same type of blank can be used to manufacture the same type of cage-like components 3, or the same type of cage-like components 3 can be manufactured by using the same method, which is beneficial to reduce the processing cost of the cage-like components 3. On the other hand, the diameter of the cage-like components 3 can be set according to the maximum diameter of the cage-like components 3 that the diseased blood vessel can accommodate. As a result, when the cage-like components 3 of the third scheme are released into the diseased blood vessel, the minimum width of the capture hole 301 that is inserted or penetrated by the retrograde guide wire B1 is relatively large, making it easier for the capture hole 301 to be inserted or penetrated by the retrograde guide wire B1.

[0086] In the fourth option, see Figure 9 The fourth scheme has the advantage that the cage-like components 3 with different diameters, and the cage-like components 3 with larger diameters at the tail end A2 (the tail end A2 of all cage-like components 3) and smaller diameters at the head end A1 (the head end A1 of all cage-like components 3), can be positioned deeper in the lesion after the smallest diameter cage-like component 3 is released into the lesion. This helps reduce the time it takes for the retrograde guidewire B1 to be inserted into the capture hole 301 of the smallest diameter cage-like component 3. Furthermore, if the retrograde guidewire B1 crosses the capture hole 301 from outside the outline of the smallest diameter cage-like component 3, the diameters of the subsequent cage-like components 3 are larger than those of the preceding cage-like components 3. This makes the minimum width of the retrograde guidewire B1 inserted into the capture hole 301 of the subsequent cage-like component 3 increasingly larger, which helps improve the efficiency of the retrograde guidewire B1 inserting into or penetrating the capture hole 301 of one of the subsequent cage-like components 3.

[0087] Furthermore, in this embodiment, a reverse-through guide wire B1 grasping device establishes a clock scale for reference in the circumferential direction of the push rod 2 with the axis of the push rod 2 as the center line.

[0088] All the capture holes 301 of the cage-like components 3 point to the same clock scale;

[0089] Alternatively, the clock scales pointed to by the capture holes 301 of any two adjacent cage-like components 3 may differ.

[0090] It should be understood that the clock scale used for reference is merely a reference point for illustrating the technical solution, and is not a technical solution or a technical feature of the technical solution.

[0091] The scheme in which all the cage-like components 3 have their capture holes 301 pointing to the same clock scale is defined as the fifth scheme;

[0092] In the fifth option, see Figure 9 If the first capture hole 301 of the first cage-like component 3 points to the one o'clock position on the clock scale, then one of the capture holes 301 of the second, third, and fourth cage-like components 3 must also point to the one o'clock position on the clock scale; similarly, if the second capture hole 301 of the first cage-like component 3 points to the seven o'clock position on the clock scale, then one of the capture holes 301 of the second, third, and fourth cage-like components 3 must also point to the seven o'clock position on the clock scale; and so on, the capture holes 301 of the preceding cage-like component 3 and the capture holes 301 of the following cage-like component 3 point to the same clock scale;

[0093] In the actual manufacturing process of the reverse wire B1 capture device of the fifth scheme, the multiple cage-like components 3 are arranged in the manner of the fifth scheme, which helps to reduce the manufacturing cost of the reverse wire B1 capture device.

[0094] In the practical application of the fifth scheme of the reverse guide wire B1 capture device, if the reverse guide wire B1 passes through the capture holes 301 of two adjacent or non-adjacent cage-like components 3 one after another, then when all the cage-like components 3 and the reverse guide wire B1 are housed in the guide tube 1, the reverse guide wire B1 is restricted to a curved shape by the two cage-like components 3, which helps to increase the friction between the cage-like components 3 and the reverse guide wire B1, so that the reverse guide wire B1 can be smoothly pulled by the two cage-like components 3.

[0095] The scheme in which the clock scales pointed to by the capture holes 301 of any two adjacent cage-like components 3 are different is defined as the sixth scheme;

[0096] In the sixth option, see Figure 4If the first capture hole 301 of the first cage-like component 3 points to the one o'clock position on the clock scale, then neither of the capture holes 301 in the adjacent second cage-like component 3 points to the one o'clock position on the clock scale. This results in the capture hole 301 of the first cage-like component 3 pointing to a different position than the capture hole 301 of the second cage-like component 3. Similarly, the capture holes 301 of any other two adjacent cage-like components 3 will point to different positions.

[0097] In the actual application of the sixth scheme of the reverse guide wire B1 capture device, if the reverse guide wire B1 passes through the capture holes 301 of two adjacent cage-like components 3 one after another, then when all the cage-like components 3 and the reverse guide wire B1 are housed in the guide tube 1, the reverse guide wire B1 is restricted to a curved shape by the two cage-like components 3, and the curvature of the reverse guide wire B1 is greater than that of the reverse guide wire B1 in the aforementioned fifth scheme, so that the contact area between the reverse guide wire B1 and multiple cage-like components 3 is larger; if the reverse guide wire B1 passes through the capture holes 301 of two non-adjacent cage-like components 3 one after another, the effect is the same as or similar to that of the aforementioned fifth scheme, and the rest will not be elaborated here.

[0098] Furthermore, in this embodiment of the reverse-through guide wire B1 capture device, when the cage-like component 3 is in the first state, the diameter of the cage-like component 3 is less than or equal to the inner diameter of the guide tube 1.

[0099] When the cage-like component 3 is in the second state, the diameter of the cage-like component 3 is greater than the outer diameter of the conduit 1.

[0100] See Figure 2 or Figure 8 When the cage-like component 3 is in the first state, the reverse guide wire B1 is either clamped or penetrates the cage-like component 3 in the conduit 1 relative to the cage-like component 3. This creates friction between the rib 302 of the cage-like component 3 and the reverse guide wire B1, making it easier to pull the reverse guide wire B1 through the push rod 2 and the cage-like component 3.

[0101] From the perspective of catheter 1, the cage-like component 3 and the retrograde guide wire B1 in the first state are contained by catheter 1. Catheter 1 applies a first reaction force to the cage-like component 3, forcing the cage-like component 3 to be in the first state. As the retrograde guide wire B1 inserts into or penetrates the cage-like component 3, when catheter 1 applies a reaction force to the cage-like component 3, the retrograde guide wire B1 applies a second reaction force to the cage-like component 3. The second reaction force forces at least one rib 302 of the cage-like component 3 to deform or deform, so that the retrograde guide wire B1 is clamped by all the ribs 302. It should be understood that the source of the first reaction force is the elastic force (self-expansion force) of the cage-like component 3, and the source of the second reaction force is the pressure applied by the cage-like component to the retrograde guide wire B1.

[0102] See Figure 1 or Figure 9 or Figure 10 When the cage-like component 3 is in the second state, the cage-like component 3 is located outside the conduit 1. During the process of the cage-like component 3 changing from the first state to the second state, the elasticity of the cage-like component 3 causes the diameter of the cage-like component 3 to change from a smaller diameter inside the conduit 1 to a larger diameter outside the conduit 1.

[0103] The diameter of the cage-like component 3 in the second state should be greater than the outer diameter of the conduit 1, so that the minimum width of the capture hole 301 of each cage-like component 3 can be maximized by expanding as much as possible (it should be understood that the minimum width of the capture hole 301 of the cage-like component 3 in the second state is close to or reaches the minimum width of the capture hole 301 in the design parameters), thereby facilitating the insertion of the guide wire B1 into the capture hole 301.

[0104] Further, see Figures 1 to 4 , Figures 8 to 10 The reverse guide wire B1 capture device of this embodiment also includes multiple connecting sections 4;

[0105] A cage-like component 3 is provided between two adjacent connecting segments 4, and the connecting segment 4 is welded to the cage-like component 3;

[0106] A strip groove 401 is provided on the connecting section 4. The strip groove 401 is recessed in the circumferential surface of the connecting section 4 and extends along the circumferential direction of the circumferential surface.

[0107] Alternatively, a spiral groove (not shown in the figure) is provided on the connecting section 4, and the spiral groove is recessed into the circumferential surface of the connecting section 4.

[0108] The connecting segment 4 itself can be configured as a columnar structure with a small diameter. The purpose of the connecting segment 4 is to connect one end of one of the multiple ribs 302 of the cage-like component 3 to one end of the connecting segment 4, so as to prevent the ribs 302 of the cage-like component 3 from scraping the vessel wall of the diseased blood vessel when the cage-like component 3 expands to the second state; and to prevent the ribs 302 of the cage-like component 3 from scraping the catheter 1 inside the catheter 1.

[0109] The purpose of the spiral groove or strip groove 401 provided on the connecting section 4 is to increase the bending capacity of the connecting section 4 itself and increase the bending angle of the connecting section 4 itself.

[0110] It should be understood that the diameter of the connecting segment 4 should be smaller than the inner diameter of the catheter 1, and when the connecting segment 4 and the retrograde guidewire B1 are both located inside the catheter 1, the sum of the diameters of the connecting segment 4 and the retrograde guidewire B1 should be less than or equal to the inner diameter of the catheter 1.

[0111] Further, see Figures 1 to 5 , Figures 8 to 10 The reverse guide wire B1 capture device of this embodiment also includes a core wire 5 and a head end coiling spring 6. The head end coiling spring 6 is connected to the head end A1 through the core wire 5. Ball heads 601 are respectively provided at the two ends of the head end coiling spring 6 away from the core wire 5.

[0112] The hardness of the head spring 6 is lower than that of the core wire 5. The head spring 6 and the core wire 5 are set at the head A1 of multiple cage-like components 3. The purpose is to use the low hardness of the head spring 6 to pass through the tortuous positions in the diseased blood vessel, such as the bend or the intersection of the diseased blood vessel. When the head spring 6 comes into contact with the blood vessel wall at the tortuous position, the head spring 6 is easy to deform, so the head spring 6 can pass through the tortuous position more easily under the condition of deformation. In addition, the deformation of the head spring 6 makes the contact area between the head spring 6 and the blood vessel wall larger, making it less likely to puncture the diseased blood vessel.

[0113] By setting a ball head 601 on the end of the head spring 6, the contact area between the end of the head spring 6 and the blood vessel wall is increased by the ball head 601, thereby reducing the pressure between the head spring 6 and the blood vessel wall and achieving the purpose of preventing the end of the head spring 6 from puncturing the diseased blood vessel.

[0114] Further, see Figure 3 or Figure 4 or Figure 9 or Figure 10 The reverse guide wire B1 capture device of this embodiment also includes a tail end coiled spring 7;

[0115] A portion of the push rod 2 connected to the tail end A2 is defined as the mounting section 201. The mounting section 201 is converging along the direction from the head end A1 to the tail end A2. The tail end spring 7 is sleeved on the mounting section 201. The tail end spring 7, the mounting section 201, and the cage-like component 3 located at the tail end A2 are wrapped with heat shrink tubing 8.

[0116] A tail end spring 7 is provided at the connection position (tail end A2) between the push rod 2 and the multiple cage-like components 3. The tail end spring 7 is used to block the installation section 201 of the push rod 2 and the tail end A2 of the multiple cage-like components 3 relative to the blood vessel wall, so as to prevent the installation section 201 and the tail end A2 from directly contacting the blood vessel wall.

[0117] The deformation of the tail-end coiled spring 7 at the tortuous position within the diseased blood vessel differs from the deformation of the mounting section 201 of the push rod 2 at the tortuous position. Specifically, using the outer and inner arc portions of the tortuous position within the diseased blood vessel as references, when the tail-end coiled spring 7 deforms at the tortuous position, the outer arc protrusion of the tail-end coiled spring 7 is closer to the outer arc portion of the tortuous position, while the inner arc concavity of the tail-end coiled spring 7 is further away from the inner arc portion of the tortuous position. However, when the mounting section 201 of the push rod 2 and the tail-end A2 deform at the tortuous position... Because the hardness of the mounting section 201 of the push rod 2 is higher than that of the tail end spring 7, the mounting section 201 of the push rod 2 tends to approach the outer arc of the bend position. Therefore, when the tail end spring 7, the mounting section 201 of the push rod 2 and the tail end A2 pass through the bend position at the same time, the outer arc protrusion of the tail end spring 7 blocks the mounting section 201 of the push rod 2 from the blood vessel wall. As the tail end spring 7 moves, the mounting section 201 of the push rod 2 passes through the bend position smoothly, avoiding the mounting section 201 of the push rod 2 from putting pressure on the blood vessel wall and puncturing the blood vessel wall.

[0118] In addition, the tail end spring 7, the mounting section 201 and the tail end A2 are respectively wrapped with heat shrink tubing 8. The purpose is to use the smooth surface of the heat shrink tubing 8 to further reduce the friction force generated by the tail end spring 7, the mounting section 201 and the tail end A2 on the blood vessel wall, so as to facilitate the tail end spring 7, the mounting section 201 and the tail end A2 to pass smoothly through the tortuous position.

[0119] In this embodiment, a heat shrink tubing made of PTFE material is preferably used.

[0120] Further, see Figure 1 or Figure 10 In this embodiment, a reverse-threaded guide wire B1 capture device has multiple markings 9 on the push rod 2;

[0121] The two ends of the conduit 1 are the first end and the last end, respectively. Multiple cage-like components 3 are located at the first end, and multiple markings 9 are located at the last end.

[0122] The position of any mark 9 relative to the end port is matched with the position of one of the cage-like components 3 relative to the beginning port, wherein when any mark 9 is covered by the conduit 1, the cage-like component 3 matching the covered mark 9 is exposed outside the conduit 1.

[0123] In this embodiment, no specific limitation is made on the specific setting method of the mark 9, as long as medical staff can clearly distinguish the mark 9 from the push rod 2; for example, the mark 9 and the push rod 2 have obvious color difference, so that medical staff can clearly distinguish the mark 9 from the push rod 2, or the mark 9 has obvious shape, so that medical staff can clearly distinguish the mark 9 from the push rod 2.

[0124] When medical personnel actually operate the retrograde guidewire B1 capture device of this embodiment, on the one hand, they can observe through X-ray images whether the push rod 2 pushes multiple cage-like components 3, so that at least one or all of the cage-like components 3 are released outside the catheter 1 located in the diseased blood vessel; on the other hand, in order to accurately control the number of cage-like components 3 released, medical personnel need to use the markings 9 on the push rod 2 for visual confirmation. When the medical personnel push the push rod 2 so that any marking 9 is covered by the catheter 1 (i.e., the marking 9 is stored inside the catheter 1), the medical personnel can determine that the cage-like component 3 corresponding to the covered marking 9 has been released outside the catheter 1.

[0125] Furthermore, in this embodiment, a reverse-through guide wire B1 capture device has at least one imaging structure for display in X-ray images provided in the cage-like component 3 or between two adjacent cage-like components 3.

[0126] The developing structure is at least one of the following: a developing coating, a platinum developing spot, and a developing polymer tubing.

[0127] Specifically, a developing layer is coated on the surface of the cage-like component 3, or platinum developing dots are provided on the ribs 302 of the cage-like component 3, or a developing polymer tube is wrapped around the connecting section 4.

[0128] The head spring 6 and tail spring 7 proposed in the aforementioned scheme can be made of materials such as platinum tungsten or platinum nickel, so that the head spring 6 and tail spring 7 have the function of being developed in X-ray images; or, the head spring 6 and tail spring 7 can be made of other materials, and platinum tungsten or platinum nickel can be set on the head spring 6 and tail spring 7.

[0129] In this embodiment, the developing polymer tubing includes tubing made of pebax355 and BaSO4.

[0130] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A reverse wire threading capture device, comprising: The catheter, the push rod and a plurality of cage members for being inserted or penetrated by a reverse wire; The plurality of cage members are configured as sequentially spaced and connected structures along a strip-shaped path, wherein the plurality of cage members have a tail end close to the push rod and a head end away from the push rod, the push rod is connected to the tail end, and the catheter is sleeved on the push rod; Each of the cage members has a first state located in the catheter and a second state located outside the catheter, and the push rod is used to drive each of the cage members to transform between the first state and the second state.

2. The reverse wire catching device of claim 1, wherein, Each of the cage members is made of at least three ribs, each of which is configured as a zigzag shape, and at least one capture hole is formed between any two adjacent ribs, and any of the capture holes is used to be inserted or penetrated by the reverse wire.

3. The reverse wire catching device according to claim 1 or 2, wherein, The diameters of each of the cage members are the same; Alternatively, in the direction from the head end to the tail end, the diameter of the cage member in front is smaller than the diameter of the cage member behind.

4. The reverse wire catching device of claim 2, wherein, The axial line of the push rod is taken as a center line to establish a clock scale in the circumferential direction of the push rod for reference; The clock scales pointed by the capture holes of all the cage members are communicated; Alternatively, the clock scales pointed by the capture holes of any two adjacent cage members are different.

5. The reverse wire catching device of claim 1, wherein, When the cage member is in the first state, the diameter of the cage member is less than or equal to the inner diameter of the catheter; When the cage member is in the second state, the diameter of the cage member is greater than the outer diameter of the catheter.

6. The reverse wire catching device of claim 1, wherein, Further comprising a plurality of connecting segments; One of the cage members is arranged between two adjacent connecting segments, and the connecting segments are welded to the cage members; The connecting segments are provided with strip-shaped grooves recessed in the circumferential surface of the connecting segments, and the strip-shaped grooves extend along the circumferential direction of the circumferential surface; Alternatively, the connecting segments are provided with spiral grooves recessed in the circumferential surface of the connecting segments.

7. The reverse wire catching device of claim 1, wherein, Further comprising a core wire and a head-end coiled spring connected to the head end through the core wire, wherein the two ends of the head-end coiled spring away from the core wire are respectively provided with ball heads.

8. The reverse wire catching device of claim 7, wherein, Further comprising a tail-end coiled spring; A part of the push rod connected to the tail end is defined as a mounting segment, the mounting segment is convergent in the direction from the head end to the tail end, and the tail-end coiled spring is sleeved on the mounting segment, wherein the tail-end coiled spring, the mounting segment and the position between the tail-end coiled spring and the mounting segment are wrapped with a heat-shrinkable tube.

9. The reverse wire catching device of claim 1, wherein, The push rod is provided with a plurality of markers; The two ends of the catheter are respectively a head end and a tail end, wherein the plurality of cage members are located at the position of the head end, and the plurality of markers are located at the position of the tail end; Any of the markers matches the position of one of the cage members relative to the head end, and when any of the markers is shielded by the catheter, the cage member matching the shielded marker is exposed outside the catheter.

10. The reverse wire catching device of claim 1, wherein, At least one developing structure is arranged in the cage-shaped part or between two adjacent cage-shaped parts for displaying in X-ray image. The developing structure is at least one of developing coating, platinum developing point and developing polymer tube.

Images