Bending-adjustable guide wire structure and device

Abstract

The utility model discloses an adjustable bending guide wire structure and device, and belongs to the technical field of medical instruments, the adjustable bending guide wire structure comprises a bending adjusting guide wire, the bending adjusting guide wire comprises a cross rod part and a bending adjusting part fixedly connected with the cross rod part, the cross rod part and the bending adjusting part are welded and fixed, and an adjusting guide wire is arranged in the cross rod part and the bending adjusting part; the transverse rod part comprises a spring tube formed by winding a stainless steel wire and a developing wire positioned in the middle of the spring tube, four cylindrical core wires are tightly wound around the developing wire, and bending adjusting wires are arranged in gaps between the core wires and the spring tube. The guide wire has the advantages that the bending adjusting wire for adjusting the direction and the bending degree is arranged in the gap between the core wire and the spring tube, the snake-bone tube is selected for the interior of the bending adjusting part for bending adjustment and the interior of the spring tube, the end of the snake-bone tube can be adjusted more sensitively, the guide wire has good controllability, and the service life of the guide wire is prolonged. The complexity and the operation time of an operation are reduced, the workload of medical staff is reduced, and the success rate and the safety of the operation are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and particularly relates to an adjustable bending guide wire structure and device. Background Technique

[0002] As a commonly used medical device, the guide wire is widely used in various interventional surgeries. Its main function is to enter the body lumen such as blood vessels and ureters as a guiding device first, and reach the target site with the assistance of medical imaging means such as ultrasound and X-ray, so as to establish a path for the subsequent intervention and implantation of catheters or other medical devices for diagnosis and treatment.

[0003] With the increasing incidence of cardiovascular and cerebrovascular diseases, vascular interventional surgeries such as vascular stents are becoming more and more common. Vascular interventional surgery is a minimally invasive surgical technique that uses a guide wire to reach a far target area in the human body through blood vessels and complete the corresponding medical process. Before the guide wire enters the human body, the head of the guide wire usually needs to be bent to make it have a suitable angle. Because the pores and blood vessels in the human body are intricate and have many branches, during the operation, it is necessary to frequently adjust the bending angle of the medical guide wire to meet various pores and blood vessel branches, which adds great difficulty to the delivery work. This undoubtedly places high demands on medical staff operators, resulting in an increase in the operation time. Coupled with the inevitable shaking of the human hand and the fatigue caused by long-term operation, the operation risk increases, which in turn affects the success rate and safety of the operation.

[0004] For existing conventional guide wires, when passing through tortuous blood vessels, due to the existence of certain axial stress at the distal end of the guide wire, it will inevitably come into contact with the blood vessel wall and cause friction, which is likely to damage the blood vessel wall and cause blood vessel wall perforation; when the distal end of the guide wire is used in surgeries such as stent implantation and thrombus removal to pass through a narrow lesion site, it is easy to cause thrombus displacement and shedding of atherosclerotic plaques on the blood vessel wall, bringing unpredictable risks to patients; when passing through bifurcated blood vessels and for aneurysm embolization surgery, the ability to enter the aneurysm is also poor and requires repeated attempts, which not only increases the probability of blood vessel injury and aneurysm rupture, but also prolongs the operation time and is not conducive to the operation of doctors.

[0005] Some adjustable deflectable guide wire patents are disclosed in the prior art. Among them, the invention patent with the publication number CN112023226A applies for an adjustable deflectable guide wire, which includes a guide wire head end, an elastic component connected to one end of the guide wire head end, and a guide wire rod body connected to the other end of the elastic component; the guide wire rod body is a hollow structure, and a linkage mechanism is arranged inside the guide wire rod body. The linkage mechanism extends from the proximal end of the guide wire rod body to the distal end of the guide wire rod body and is connected to the guide wire head end through an adjusting rod body; the linkage mechanism at least has a concave linkage ball that is in clearance fit with the guide wire rod body and a convex linkage ball that is in clearance fit with the guide wire rod body, and the concave linkage ball and the convex linkage ball are meshed with each other; an adjusting handle is arranged on one side of the proximal end of the linkage mechanism, and the adjusting handle is connected to the concave linkage ball or the convex linkage ball of the linkage mechanism. Although it solves the problem of remotely adjusting the distal bending through the adjusting handle, the bending adjustment accuracy is positively correlated with the number of grooves or protrusions on the surface of the linkage ball, and the more the number, the higher the adjustment accuracy, and the quantification problem of the distal bending adjustment of the guide wire, but in fact, there is still a problem that the poor controllability of the distal end of the guide wire affects the complexity and operation time of the operation.

[0006] In view of this, the inventor of the present invention conducted in-depth research on the need to improve the controllability of the distal end of the guide wire and avoid affecting the complexity and operation time of the operation, and thus this case was born. Utility Model Content

[0007] To overcome the problem that the poor controllability of the distal end of the guide wire in the prior art still affects the complexity and operation time of the operation, the present utility model provides an adjustable deflectable guide wire structure, including a deflectable guide wire, and the deflectable guide wire includes a cross bar portion and a deflecting portion fixedly connected to the cross bar portion, and the cross bar portion and the deflecting portion are fixedly welded;

[0008] The cross bar portion includes a spring tube wound by stainless steel wire and a developing wire located in the middle of the spring tube. Four cylindrical core wires are closely wound around the developing wire, and deflecting wires are arranged at the gaps between the core wires and the spring tube.

[0009] By dividing the deflectable guide wire into a cross bar portion and a deflecting portion, and adjustable guide wires for adjusting the bending angle of the guide wire are arranged inside both of them. Among them, the cross bar portion mainly used for support selects a spring outer tube, and deflecting wires for adjusting the direction and curvature are arranged at the gaps between the core wires and the spring tube, which is convenient for being more sensitive when adjusting the end of the bending portion. The structure is simple and compact. The four cylindrical core wires wrap the developing wire and ensure that the deflecting wires are in a floating state. At the same time, setting the core wires can improve the overall hardness of the guide wire and avoid the situation of overall bending deformation of the guide wire, so that the guide wire has good controllability, reduces the complexity and operation time of the operation, reduces the workload of medical staff, and improves the success rate and safety of the operation.

[0010] Furthermore, the bending adjustment part includes a snake tube, the bending adjustment wire, the developing wire and the core wire all extend out of the spring tube and are placed in the inner cavity of the snake tube, and the bending adjustment wire, the developing wire and the core wire are all fixedly connected to one end of the snake tube away from the spring tube.

[0011] Through the above technical solution, a snake-bone tube is selected as the bending adjustment part of the guide wire, and the internal structure of the snake-bone tube remains the same as that of the spring tube. The snake-bone tube ensures that the bending adjustment part can be in a bent state, which is convenient for bending.

[0012] Furthermore, a connecting ring is integrally provided at one end of the snake bone tube away from the spring tube, and a plurality of welding holes are evenly opened on the connecting ring corresponding to the bending adjustment wire. The bending adjustment wire is welded and fixed to the welding holes, and the developing wire and the core wire are fixed at the connecting ring port by laser melting or laser welding to form a smooth guide wire end.

[0013] Through the above technical solution, after the welding hole and the bending wire are fixed, the remaining developing wires and core wires are welded to the connecting ring to form a smooth guide wire end, so that the guide wire head has a smooth line shape and is easy to pass during use.

[0014] Furthermore, the spring tube is wound around the outer side of the core wire wrapped around the developing wire in a double-wire dense winding manner, and the snake-bone tube and the spring tube are fixed by laser welding or argon arc welding.

[0015] Furthermore, a plurality of slits are evenly opened on the snake bone tube by using a hypotube cutting technique, and the slits are staggered to form a circular ring.

[0016] Through the above technical solution, opening slits on the snake bone tube can realize multi-angle bending, which is convenient for the guide wire head to be bent and ensures the curvature of the snake bone tube.

[0017] Furthermore, the spring tube and the snake tube have the same outer diameter, and the outer diameter of the core wire is larger than the outer diameter of the developing wire.

[0018] Furthermore, the outer surfaces of the spring tube and the snake-bone tube are coated with a lubricating layer, and the lubricating layer is formed by curing polyvinyl pyrrolidone to form a hydrophilic coating or by coating with a PTFE heat shrinkable film.

[0019] Furthermore, the developing wire is made of platinum-tungsten alloy, platinum-iridium alloy or gold, and the snake tube is made of stainless steel or titanium alloy metal material with bending fatigue resistance.

[0020] The present utility model also provides an adjustable bending guide wire device, which includes an adjustable bending guide wire structure and a bending device for operating the bending. The bending device includes a hollow handle and a transmission device disposed within the handle. The free end of the spring tube passes through the handle and is disposed inside the handle, and the bending wire passes through the spring tube and is connected to the transmission device.

[0021] Further, a bending switch is provided on the handle, and the bending switch is connected to the transmission device. By rotating the bending switch, the bending direction of the end of the bending guide wire can be adjusted.

[0022] Beneficial effects:

[0023] The beneficial effects of adopting the technical solution of the present utility model are as follows:

[0024] (1) The bending guide wire is divided into a cross bar portion and a bending portion. The cross bar portion mainly used for support selects a spring outer tube, and a bending wire for adjusting the direction and curvature is disposed in the gap between the core wire and the spring tube. The inside of the bending portion for bending is the same as that inside the spring tube, and the outside selects a snake bone tube, which is convenient for being more sensitive when adjusting the end of the snake bone tube. The structure is simple and compact. Four cylindrical core wires wrap the developing wire and ensure that the bending wire is in a free state. At the same time, setting the core wire can improve the overall hardness of the guide wire and avoid the situation of overall bending deformation of the guide wire, so that the guide wire has good controllability, reduces the complexity and operation time of the operation, reduces the workload of medical staff, and improves the success rate and safety of the operation.

[0025] (2) By adjusting the handle, the bending of the distal bending portion of the operator can be remotely adjusted. The bending adjustment accuracy is positively correlated with the flexibility of the snake bone tube and the bending wire. The more flexible the snake bone tube and the bending wire are, the higher the adjustment accuracy is. Since a plurality of slits are provided on the snake bone tube, the bending wire has multiple bending angles. Therefore, the bending wire of the present application has excellent bending effect, bending accuracy and bending controllability.

[0026] (3) The end of the snake bone tube is processed into a smooth structure by welding, and a lubricating layer is provided on the outer surface of the outer tube to keep the surface of the guide wire smooth. Therefore, when encountering curved and narrow blood vessels or bifurcated blood vessels during the interventional operation, the risk of damaging the patient's blood vessels can be reduced. Description of the drawings

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0028] Figure 1 This is a schematic structural view of an adjustable bending guide wire structure of the present utility model;

[0029] Figure 2 This is a schematic structural view of the cross-section of the spring tube of an adjustable bending guide wire structure of the present utility model;

[0030] Figure 3 This is a schematic structural view of the osteotomy tube of an adjustable bending guide wire structure of the present utility model;

[0031] Figure 4 This is an enlarged view of the end of the osteotomy tube of an adjustable bending guide wire structure of the present utility model;

[0032] Figure 5 This is a schematic structural view of an adjustable bending guide wire device of the present utility model;

[0033] In the figure, 1 is the cross bar part; 2 is the bending adjustment part; 3 is the spring tube; 4 is the visualization wire; 5 is the core wire; 6 is the bending adjustment wire; 7 is the osteotomy tube; 8 is the connecting ring; 9 is the welding hole; 10 is the guide wire end; 11 is the slit; 12 is the lubricating layer; 13 is the handle; 14 is the bending adjustment switch. Specific embodiments

[0034] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0035] In this embodiment, a bending adjustment wire for adjusting the direction and bending degree is arranged in the gap between the core wire and the spring tube. The interior of the bending adjustment part for bending adjustment is the same as that of the spring tube, and the exterior is made of an osteotomy tube, which facilitates more sensitive adjustment when adjusting the end of the osteotomy tube. The guide wire has good controllability, reduces the complexity and operation time of the operation, reduces the workload of medical staff, and improves the success rate and safety of the operation. The specific embodiments are as follows:

[0036] As Figures 1-5 shown, an adjustable bending guide wire structure includes a bending adjustment guide wire. The bending adjustment guide wire includes a cross bar part 1 and a bending adjustment part 2 fixedly connected to the cross bar part 1. The cross bar part 1 and the bending adjustment part 2 are fixedly connected by welding;

[0037] The crossbar 1 includes a spring tube 3 wound with stainless steel wire and a developing wire 4 located in the middle of the spring tube 3 . The developing wire 4 is tightly wrapped by four cylindrical core wires 5 . The gaps between the core wires 5 and the spring tube 3 are provided with bending wires 6 .

[0038] Here, the bending guide wire is divided into a crossbar portion 1 and a bending adjustment portion 2, both of which are internally provided with an adjustment guide wire for adjusting the bending angle of the guide wire. The crossbar portion 1 mainly used for support is equipped with a spring outer tube, and a bending adjustment wire 6 for adjusting the direction and curvature is arranged in the gap between the core wire 5 and the spring tube 3, so that it can be more sensitive when adjusting the end of the bending portion. The structure is simple and compact. The four cylindrical core wires 5 wrap the developing wire 4 and ensure that the bending adjustment wire 6 is in a free state. At the same time, the core wire 5 can improve the overall hardness of the guide wire to avoid the overall bending and deformation of the guide wire, so that the guide wire has good controllability, reduces the complexity and operation time of the operation, reduces the workload of medical staff, and improves the success rate and safety of the operation.

[0039] As a preferred embodiment, the bending adjustment part 2 includes a snake tube 7, and the bending adjustment wire 6, the developing wire 4 and the core wire 5 all extend out of the spring tube 3 and are placed in the inner cavity of the snake tube 7, and the bending adjustment wire 6, the developing wire 4 and the core wire 5 are all fixedly connected to the end of the snake tube 7 away from the spring tube 3.

[0040] Here, a serpentine tube 7 is selected as the bending adjustment portion 2 of the guide wire, and the interior of the serpentine tube 7 maintains the same structure as that of the spring tube 3. The serpentine tube 7 ensures that the bending adjustment portion 2 can be in a bent state, which is convenient for bending.

[0041] As a preferred embodiment, a connecting ring 8 is integrally provided at one end of the snake bone tube 7 facing away from the spring tube 3, and a plurality of welding holes 9 are evenly opened on the connecting ring 8 corresponding to the bending wire 6. The bending wire 6 is welded and fixed to the welding holes 9, and the developing wire 4 and the core wire 5 are fixed at the end of the connecting ring 8 by laser melting or laser welding to form a smooth guide wire end 10.

[0042] Here, after the welding hole 9 is fixed to the bending wire 6, the remaining developing wire 4 and the core wire 5 are welded together with the connecting ring 8 as the base to form a smooth guide wire end 10, so that the line of the guide wire head is smooth and convenient for passing during use. In addition, the direction of the adjustable bend can be controlled by the distribution of the welding holes 9. When two welding holes 9 are set, bidirectional bending is possible, and when four welding holes 9 are set, four directions of bending are possible.

[0043] As a preferred embodiment, the spring tube 3 is wound around the outer side of the core wire 5 wrapped around the developing wire 4 in a double-wire dense winding manner, and the snake tube 7 and the spring tube 3 are fixed by laser welding or argon arc welding.

[0044] Here, the outer layer spring is wound around the core wire 5 in a double-wire dense winding manner, and the outer layer spring tightly clamps the core wire 5. After the spring winding is completed, the core wires 5 at both ends will be exposed to a suitable length, and the bending wire 6 between the outer layer spring and the core wire 5 is pulled back and forth to ensure that it can move freely. The distal exposed core wire 5, the developing wire 4 and the bending wire 6 can be temporarily fixed at the head end by bonding or welding to obtain a smooth end surface, which is convenient for passing through the snake bone tube 7.

[0045] As a preferred embodiment, a plurality of slits 11 are evenly opened on the snake bone tube 7 by using a hypotube cutting technique, and the slits 11 are staggered to form a ring.

[0046] Here, the slits 11 are provided on the snake-bone tube 7 to achieve multi-angle bending, which facilitates the bending of the guide wire head and ensures the curvature of the snake-bone tube 7.

[0047] As a preferred embodiment, the outer diameters of the spring tube 3 and the snake tube 7 are the same, and the outer diameter of the core wire 5 is greater than the outer diameter of the developing wire 4 .

[0048] As a preferred embodiment, the outer surfaces of the spring tube 3 and the coiled tube 7 are coated with a lubricating layer 12, and the lubricating layer 12 is formed by curing polyvinyl pyrrolidone to form a hydrophilic coating or by coating with a PTFE heat shrinkable film.

[0049] As a preferred embodiment, the developing wire 4 is made of platinum-tungsten alloy, platinum-iridium alloy or gold, and the snake tube 7 is made of stainless steel or titanium alloy metal material with bending fatigue resistance.

[0050] The utility model also provides an adjustable bend guide wire device, including an adjustable bend guide wire structure and a bend adjustment device for operating the bend adjustment, the bend adjustment device including an internally hollow handle 13 and a transmission device disposed in the handle 13, the free end of the spring tube 3 passes through the handle 13 and is disposed inside the handle 13, and the bend adjustment wire 6 passes through the spring tube 3 and is connected to the transmission device.

[0051] As a preferred embodiment, a bending switch 14 is provided on the handle 13 , and the bending switch 14 is connected to the transmission device. The bending direction of the end of the bending guide wire can be regulated by rotating the bending switch 14 .

[0052] Here, the bending adjustment wire 6 extends to the inside of the handle 13 near the proximal end of the handle 13, and then is connected to the bending adjustment switch 14 provided on the handle through a transmission device. The bending adjustment wire 6 is stretched by rotating the bending adjustment switch 14 on the handle, thereby realizing the regulation of the bending direction of the guide wire tip end. The specific structure of the operating handle 13 can refer to the design principle of the first bending part disclosed in CN202220658392.0, and the specific structure and control principle will not be repeated here.

[0053] The above is only the preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adjustable curved guide wire structure, characterized in that: The invention comprises a bending adjustment guide wire, wherein the bending adjustment guide wire comprises a cross bar portion (1) and a bending adjustment portion (2) fixedly connected to the cross bar portion (1), and the cross bar portion (1) and the bending adjustment portion (2) are fixed by welding; The crossbar portion (1) comprises a spring tube (3) wound from stainless steel wire and a developing wire (4) located in the middle of the spring tube (3); four cylindrical core wires (5) are tightly wrapped around the developing wire (4); and a bending wire (6) is provided at the gap between the core wire (5) and the spring tube (3).

2. The adjustable curved guide wire structure according to claim 1, characterized in that: The bending adjustment portion (2) comprises a snake tube (7); the bending adjustment wire (6), the developing wire (4) and the core wire (5) all extend out of the spring tube (3) and are placed in the inner cavity of the snake tube (7); the bending adjustment wire (6), the developing wire (4) and the core wire (5) are all fixedly connected to one end of the snake tube (7) away from the spring tube (3).

3. The adjustable curved guide wire structure according to claim 2, characterized in that: A connecting ring (8) is integrally provided at one end of the snake tube (7) away from the spring tube (3); a plurality of welding holes (9) are evenly provided on the connecting ring (8) corresponding to the bending adjustment wire (6); the bending adjustment wire (6) is fixed to the welding holes (9) by welding; the developing wire (4) and the core wire (5) are fixed at the end of the connecting ring (8) by laser melting or laser welding to form a smooth guide wire end (10).

4. The adjustable curved guide wire structure according to claim 2, characterized in that: The spring tube (3) is wound around the outer side of the core wire (5) wrapped around the developing wire (4) in a double-wire dense winding manner, and the snake tube (7) and the spring tube (3) are fixed by laser welding or argon arc welding.

5. The adjustable curved guide wire structure according to claim 2, characterized in that: The snake bone tube (7) is evenly provided with a plurality of slits (11) by using a hypotube cutting technique, and the slits (11) are staggered to form a circular ring.

6. The adjustable curved guide wire structure according to claim 2, characterized in that: The outer diameters of the spring tube (3) and the snake tube (7) are the same, and the outer diameter of the core wire (5) is greater than the outer diameter of the developing wire (4).

7. The adjustable curved guide wire structure according to claim 2, characterized in that: The outer surfaces of the spring tube (3) and the snake tube (7) are coated with a lubricating layer (12), and the lubricating layer (12) is formed by curing polyvinyl pyrrolidone to form a hydrophilic coating or by coating with a PTFE heat shrink film.

8. The adjustable curved guide wire structure according to claim 2, characterized in that: The developing wire (4) is made of platinum-tungsten alloy, platinum-iridium alloy or gold, and the snake tube (7) is made of stainless steel or titanium alloy metal material with bending fatigue resistance.

9. An adjustable curved guide wire device, characterized in that: It comprises an adjustable bend guide wire structure as described in any one of claims 1 to 8 and a bend adjustment device for operating the bend adjustment, wherein the bend adjustment device comprises an internally hollow handle (13) and a transmission device disposed in the handle (13), the free end of the spring tube (3) passes through the handle (13) and is disposed inside the handle (13), and the bend adjustment wire (6) passes through the spring tube (3) and is connected to the transmission device.

10. The adjustable curved guide wire device according to claim 9, characterized in that: The handle (13) is provided with a bending switch (14), and the bending switch (14) is connected to the transmission device. The bending direction of the end of the bending guide wire can be regulated by rotating the bending switch (14).

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