Hollow guide wire and use method thereof

Abstract

The invention relates to a hollow guide wire and a using method thereof. The hollow guide wire comprises a guide wire body, and a first developing mark is arranged at the tail end of the guide wire body; the bump body is arranged at the far end of the guide wire body, and a second developing mark is arranged in the bump body; the guide wire body is arranged in the bump body in a penetrating manner, and the guide wire body and the bump body are coaxially arranged; the diameter of the middle of the bump body is largest, and the two ends are gradually reduced. The bumps are arranged on the guide wire, so that when the guide wire is matched with the catheter for operation, the efficiency of the catheter for passing through a bent blood vessel and a bifurcated blood vessel is improved, and the phenomenon that the catheter is stuck is reduced. The operation is convenient, and the time for establishing an operation pathway is shortened.

Description

Technical Field

[0001] The present invention relates to the field of medical equipment, and in particular to a hollow guide wire and a method for using the same. Background Art

[0002] like Figure 1 As shown, during vascular interventional surgery, it is often necessary to use a guidewire to guide the catheter 1 to the target lesion site at the distal end of the blood vessel to establish a diagnostic and treatment pathway. However, when encountering a relatively thin and tortuous blood vessel with a branch vessel 22, and the branch vessel 22 is just in the direction of the curved outer arc of the main blood vessel 21. Because the inner cavity diameter of the catheter 1 is much larger than the outer diameter of the guidewire, this will cause the guidewire to be eccentric in the catheter 1, that is, a large gap will be generated between the catheter 1 and the guidewire, showing a large "windowsill" from the cross-section. When the catheter 1 is transported along the guidewire, the catheter 1 will deviate from one side of the guidewire and scrape against the main blood vessel 21. When encountering a bifurcated blood vessel, it is very easy to get stuck, resulting in the inability to push forward. This phenomenon is clinically called the "windowsill effect."

[0003] Especially during neurointerventional surgery, the internal carotid artery is usually very tortuous. When the catheter is pushed along the guide wire to the end of the internal carotid artery, the bifurcation vessel, the ophthalmic artery, is the only way for the catheter to be delivered to the distal part of the middle cerebral artery during anterior circulation interventional surgery. The probability of the catheter end getting stuck here is very high, which increases the difficulty of the operator's operation, prolongs the operation time, and even leads to the failure of establishing the surgical access, delaying the patient's best rescue time, thereby reducing the patient's benefit and affecting the treatment effect.

[0004] Chinese patent number CN117982777A discloses a guidewire system with a balloon. While this guidewire incorporates a balloon at the distal end to partially increase its diameter and address the sill effect, the added balloon requires fluid infusion, necessitating the addition of a connector at the proximal end, increasing the complexity of the procedure. Furthermore, the fluid-filled balloon does not appear more flexible, potentially complicating catheter guidance. Furthermore, the distal length of the guidewire cannot be controlled, precluding the opportunity for continued microwire delivery.

[0005] like Figure 2 As shown, the existing method is to use multiple catheters over a guidewire during surgery. For example, when using a guidewire 3 to deliver the most common 6F distal access catheter, a microcatheter 11 is first placed over the guidewire. A 4F or 5F catheter is then placed over the microcatheter 11. These two catheters are used to increase the wall thickness of the guidewire 3 and are placed between the guidewire 3 and the catheter 1. If a larger 7F or 8F distal access catheter is used, three or more catheters are required to address the sill effect. This not only complicates the surgery, prolongs the operation time, is uneconomical, but also increases the risk of surgery. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology, provide a hollow guide wire and a method of using the same, and solve the problems of making the operation more complicated, prolonging the operation time, being uneconomical, and increasing the technical problems of the operation when dealing with the "window sill effect".

[0007] The technical solution adopted by the present invention to solve its technical problem is:

[0008] First aspect:

[0009] A hollow guide wire is provided, comprising

[0010] A guide wire body, wherein a first development mark is provided at the end of the guide wire body;

[0011] A bulge body, the bulge body is arranged at the distal end of the guide wire body, and a second development mark is arranged in the bulge body;

[0012] The guide wire body is inserted into the bulge body and is coaxially arranged with the guide wire body;

[0013] The diameter of the bulge body is the largest in the middle and gradually decreases at both ends.

[0014] Furthermore, a single lumen channel is provided inside the guide wire body.

[0015] Furthermore, the maximum diameter of the middle of the bulge body is 0.4 to 4 mm, and the length is 5 to 50 mm.

[0016] Furthermore, the outer diameter of the guide wire body is 0.035-0.085", and the inner diameter thereof is 0.010-0.030".

[0017] Furthermore, the bulge body is a double-cone structure with a larger middle and smaller ends, or an elliptical structure.

[0018] Second aspect:

[0019] A method for using the hollow guidewire is provided. During surgery, the operator first controls the hollow guidewire to move a certain distance within the cerebral blood vessel, and monitors the position of the hollow guidewire in real time using a developing mark to ensure that the axis of the hollow guidewire coincides with the axis of the cerebral blood vessel, until the bulge reaches the bifurcation of the cerebral blood vessel. A second developing mark is used to observe and prevent the hollow guidewire from entering the bifurcation vessel.

[0020] The catheter is controlled to follow the path established by the hollow guidewire. When the catheter follows through the tortuous and narrow bifurcation of the distal cerebral blood vessels, the cross section of the catheter and the cross section of the cerebral blood vessels form concentric circles. That is, the end wall of the catheter will not be hooked by the bifurcation of the cerebral blood vessels, so that the catheter can smoothly pass through the tortuous and narrow bifurcation of the cerebral blood vessels.

[0021] Continue to push the catheter until it reaches the preset position and withdraw the hollow guide wire.

[0022] The third aspect:

[0023] A method for using the hollow guide wire is provided. During surgery, the operator first inserts the hollow guide wire into the catheter, and the bulge of the hollow guide wire is placed at the end of the catheter.

[0024] The catheter equipped with the hollow guidewire is then moved within the cerebral blood vessels. The position of the catheter and the hollow guidewire is monitored in real time using the imaging marker to ensure that the axis of the catheter and the hollow guidewire coincides with the axis of the cerebral blood vessels until the bulge reaches the bifurcation of the cerebral blood vessels. A second imaging marker is used to observe and prevent the catheter and the hollow guidewire from entering the bifurcation vessels.

[0025] Continue to deliver the catheter and hollow guidewire. When the catheter reaches the tortuous and narrow bifurcation of the distal cerebral blood vessels, the cross section of the catheter and the cross section of the cerebral blood vessels form concentric circles. That is, the end wall of the catheter will not be hooked by the bifurcation of the cerebral blood vessels, so that the catheter can smoothly pass through the tortuous and narrow bifurcation of the cerebral blood vessels.

[0026] Continue to push the catheter until it reaches the preset position and withdraw the hollow guide wire.

[0027] Fourth aspect:

[0028] A method for using the hollow guidewire is provided. During surgery, the operator first controls the catheter to move a certain distance in the cerebral blood vessels, and monitors the position of the catheter in real time through the catheter's imaging mark. If the catheter passes through the bifurcated blood vessels smoothly, there is no need to use the hollow guidewire. If the catheter is stuck at the bifurcation of the cerebral blood vessels and cannot move forward, the catheter is withdrawn a short distance, and then the hollow guidewire is delivered into the catheter, and then the subsequent steps of the above-mentioned method are carried out.

[0029] The beneficial effects of the present invention are:

[0030] The bulge on the guidewire improves the efficiency of the catheter in maneuvering through bends and bifurcated vessels, reducing the risk of stagnation. It is easy to operate and shortens the time required to establish access during surgery.

[0031] The guidewire is set to be hollow, which retains the function of delivering microguidewires and reduces the number of instrument exchanges.

[0032] The guidewire can be used alone or as a double guidewire with a built-in micro guidewire. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] Figure 1This is a schematic diagram of the situation where a catheter and a guidewire are delivered in a blood vessel and encounter a bifurcation vessel obstruction;

[0035] Figure 2 This is a conventional solution, where multiple intermediate tubes are placed between the catheter and the guidewire to make the guidewire and catheter more coaxial, thus avoiding the "window sill effect."

[0036] Figure 3 Schematic diagram of the hollow guidewire guiding the catheter across a bifurcated blood vessel of the present invention;

[0037] Figure 4 Schematic diagram of a hollow guidewire containing a microguidewire crossing a bifurcated blood vessel according to the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of the hollow guide wire of the present invention.

[0039] in,

[0040] 1. catheter, 11. microcatheter;

[0041] 21, main vessels, 22, branch vessels;

[0042] 3. Hollow guide wire, 31. Guide wire body;

[0043] 4. Drum body;

[0044] 51, first development mark, 52, second development mark;

[0045] 5. Micro guide wire. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] The present application provides a hollow guidewire, which is described in detail below. It should be noted that the order of description of the following embodiments does not limit the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in a particular embodiment, please refer to the relevant description of other embodiments.

[0048] To address the existing technical issues of the "window sill effect" that complicate surgery, prolong surgery time, are uneconomical, and increase surgical technical requirements, one embodiment of the present application provides a hollow guidewire, which is described in detail below.

[0049] like Figures 3 to 5 As shown, a hollow guide wire comprises

[0050] A guide wire body 31 , wherein a first development mark 51 is provided at the end of the guide wire body 31 ;

[0051] A bulge 4 is provided at the distal end of the guidewire body 31 and a second development mark 52 is provided in the bulge 4;

[0052] The guide wire body 31 is passed through the bulge body 4 and is coaxially arranged with the guide wire body 31;

[0053] The diameter of the bulge body 4 is the largest in the middle and gradually decreases at both ends.

[0054] Specifically, as an optional implementation in this embodiment, Figures 3 to 5 As shown, a single lumen channel is provided inside the guide wire body 31 .

[0055] In this embodiment, the single lumen channel is used for the micro-guidewire 5 to pass through, such as Figure 4 shown.

[0056] In this embodiment, the material of the developing marking wire can be platinum iridium, platinum, tungsten, etc.

[0057] Specifically, as an optional implementation in this embodiment, Figure 5 As shown, the maximum diameter of the middle part of the bulge body 4 is 0.4-4 mm, and the length is 5-50 mm.

[0058] Specifically, as an optional implementation in this embodiment, Figures 3 to 5 As shown, the outer diameter of the guide wire body 31 is 0.035-0.085", and the inner diameter thereof is 0.010-0.030".

[0059] Specifically, as an optional implementation in this embodiment, Figures 3 to 5 As shown, the bulge body 4 is a double cone structure with a large middle and small ends, or an elliptical structure.

[0060] The bulge body 4 is fixed to the guide wire body 31 by heating and melting.

[0061] The bulge body 4 can also be fixed to the guide wire body 31 by laser welding or gluing.

[0062] In this embodiment, the drum body 4 is made of polymer materials, specifically pebax, polyurethane, eptfe, etc.

[0063] In this embodiment, the guide wire body 31 is made of polymer material and reinforced by winding or braiding metal wires.

[0064] Specifically, as an optional implementation in this embodiment, the first development mark 51 can be a development ring or a development wire.

[0065] The second developing mark can also be made of a developing ring or developing wire, or a developer component can be directly added to the material of the drum package 4. At this time, barium sulfate, bismuth oxide, tungsten powder, etc. can be added to the developing mark entity for development.

[0066] The hollow guide wire 3 of the present invention is used to guide the catheter 1 through a tortuous blood vessel with bifurcations. Figure 3 and Figure 4 The hollow guide wire 3 only serves to assist in the delivery of the catheter 1 and is not used as a catheter.

[0067] Currently, during vascular interventional surgery, a guide wire and a catheter are usually positioned in tandem to allow the catheter to enter the corresponding lesion site in the blood vessel.

[0068] like Figure 1 As shown, when encountering a tortuous bifurcated blood vessel, it often gets stuck, forming a windowsill effect. At this time, it is necessary to rotate the body or catheter 1 to change its direction to overcome it. This is usually difficult. Sometimes, if the rotation force is slightly greater, vasospasm may occur or the inner wall of the blood vessel may be punctured to form a dissection.

[0069] like Figure 2 As shown, sometimes multiple catheters are arranged outside the guide wire to reduce the cross section of the thrombus suction catheter and the cross section of the microcatheter 11 to form an eccentric circle.

[0070] When the hollow guide wire 3 of the present invention is used for vascular intervention surgery, the gap between the catheter 1 and the guide wire is concentrated on the bulge 4 of the guide wire, and the catheter 1 is guided to move by the bulge 4, thereby improving the efficiency of the catheter 1 passing through the curved branch blood vessels 22, reducing the occurrence of jamming, facilitating operation, and shortening the time for establishing a pathway during surgery.

[0071] The following provides three clinical usage methods of the above-mentioned medium-bore guidewire;

[0072] 1. A method for using the hollow guidewire described above: During surgery, the operator first controls the hollow guidewire 3 to move a certain distance within the cerebral blood vessel, and monitors the position of the hollow guidewire 3 in real time using a development mark to ensure that the axis of the hollow guidewire 3 coincides with the axis of the cerebral blood vessel, until the bulge reaches the bifurcation of the cerebral blood vessel, and uses a second development mark to observe to prevent the hollow guidewire 3 from entering the bifurcation vessel;

[0073] The catheter 1 is controlled to follow the path established by the hollow guide wire 3. When the catheter 1 follows through the tortuous and narrow bifurcation of the distal cerebral blood vessel, the cross section of the catheter 1 and the cross section of the cerebral blood vessel form concentric circles, that is, the end wall of the catheter 1 will not be hooked by the bifurcation of the cerebral blood vessel, so that the catheter 1 can smoothly pass through the tortuous and narrow bifurcation of the cerebral blood vessel;

[0074] Continue to push the catheter 1 until it reaches the preset position, and then withdraw the hollow guide wire 3.

[0075] 2. Provide a method for using the hollow guidewire. During surgery, the operator first inserts the hollow guidewire 3 into the catheter 1, with the bulge of the hollow guidewire 3 placed at the end of the catheter 1.

[0076] Then, the catheter 1 equipped with the hollow guidewire 3 is moved in the cerebral blood vessel, and the positions of the catheter 1 and the hollow guidewire 3 are monitored in real time by the imaging mark to ensure that the axis of the catheter 1 and the hollow guidewire 3 coincides with the axis of the cerebral blood vessel, until the bulge reaches the bifurcation of the cerebral blood vessel. The second imaging mark is used to observe to prevent the catheter 1 and the hollow guidewire 3 from entering the bifurcation vessel;

[0077] The catheter 1 and the hollow guidewire 3 are continuously conveyed. When the catheter 1 passes through the tortuous and narrow bifurcation of the distal cerebral blood vessel, the cross section of the catheter 1 and the cross section of the cerebral blood vessel form concentric circles. That is, the end wall of the catheter 1 will not be hooked by the bifurcation of the cerebral blood vessel, so that the catheter 1 can smoothly pass through the tortuous and narrow bifurcation of the cerebral blood vessel.

[0078] Continue to push the catheter 1 until it reaches the preset position, and then withdraw the hollow guide wire 3.

[0079] 3. A method for using the hollow guidewire is provided. During surgery, the operator first controls the catheter 1 to move a certain distance in the cerebral blood vessels, and monitors the position of the catheter 1 in real time through the imaging mark on the catheter 1. If the catheter 1 passes through the bifurcated blood vessels smoothly, there is no need to install the hollow guidewire 3. If the catheter 1 is stuck at the bifurcation of the cerebral blood vessels and cannot move forward, the catheter 1 is withdrawn a short distance, and then the hollow guidewire 3 is delivered into the catheter 1. Then, the subsequent steps are carried out according to the first method of use described above.

[0080] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0081] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0082] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0083] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. There may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interface, indirect coupling or communication connection of devices or units, which may be electrical, mechanical or other forms.

[0084] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0085] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0086] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A hollow guide wire, characterized in that: include A guide wire body (31), wherein a first development mark (51) is provided at the end of the guide wire body (31); A bulge body (4), the bulge body (4) is arranged at the distal end of the guide wire body (31), and a second development mark (52) is arranged in the bulge body (4); The guide wire body (31) is passed through the bulge body (4) and is coaxially arranged with the guide wire body (31); The diameter of the bulge body (4) is the largest in the middle and gradually decreases at both ends.

2. A hollow guide wire according to claim 1, characterized in that: A single lumen channel is provided inside the guide wire body (31).

3. A hollow guide wire according to claim 1, characterized in that: The maximum diameter of the middle part of the bulge body (4) is 0.4-4 mm, and the length is 5-50 mm.

4. A hollow guide wire according to claim 1, characterized in that: The outer diameter of the guide wire body (31) is 0.035-0.085", and the inner diameter is 0.010-0.030".

5. A hollow guide wire according to claim 1, characterized in that: The bulge body (4) is a double cone structure with a large middle and small ends, or an elliptical structure.

6. A method for using the hollow guide wire according to any one of claims 1 to 5, characterized in that: During the operation, the operator first controls the hollow guide wire (3) to move a certain distance in the cerebral blood vessel, and monitors the position of the hollow guide wire (3) in real time through the imaging mark to ensure that the axis of the hollow guide wire (3) coincides with the axis of the cerebral blood vessel, until the bulge reaches the bifurcation of the cerebral blood vessel, and observes through the second imaging mark to prevent the hollow guide wire (3) from entering the bifurcation blood vessel; The catheter (1) is controlled to follow the path established by the hollow guide wire (3). When the catheter (1) follows the tortuous and narrow bifurcation through the distal cerebral blood vessel, the cross section of the catheter (1) and the cross section of the cerebral blood vessel are concentric rings, that is, the end wall of the catheter (1) will not be hooked by the bifurcation of the cerebral blood vessel, so that the catheter (1) can smoothly pass through the tortuous and narrow bifurcation of the cerebral blood vessel; Continue to push the catheter (1) until it reaches the preset position, and withdraw the hollow guide wire (3).

7. A method for using the hollow guide wire according to any one of claims 1 to 5, characterized in that: During the operation, the operator first inserts the hollow guide wire (3) into the catheter, and the bulge of the hollow guide wire (3) is placed at the end of the catheter (1); Then, the catheter (1) equipped with the hollow guide wire (3) is moved in the cerebral blood vessel, and the positions of the catheter (1) and the hollow guide wire (3) are monitored in real time by the imaging mark to ensure that the axis of the catheter (1) and the hollow guide wire (3) coincides with the axis of the cerebral blood vessel, until the bulge reaches the bifurcation of the cerebral blood vessel, and the catheter (1) and the hollow guide wire (3) are prevented from entering the bifurcation blood vessel by observing with the second imaging mark; The catheter (1) and the hollow guide wire (3) are continuously conveyed. When the catheter (1) follows through the tortuous and narrow bifurcation of the distal cerebral blood vessel, the cross section of the catheter (1) and the cross section of the cerebral blood vessel form concentric rings, that is, the end wall of the catheter (1) will not be hooked by the bifurcation of the cerebral blood vessel, so that the catheter (1) can smoothly pass through the tortuous and narrow bifurcation of the cerebral blood vessel; Continue to push the catheter (1) until it reaches the preset position, and withdraw the hollow guide wire (3).

8. A method for using the hollow guide wire according to any one of claims 1 to 5, characterized in that: During the operation, the operator first controls the catheter (1) to move a certain distance in the cerebral blood vessels, and monitors the position of the catheter (1) in real time through the imaging mark of the catheter (1). If the catheter (1) passes through the bifurcated blood vessels smoothly, there is no need to install the hollow guide wire (3). If the catheter (1) is stuck at the bifurcation of the cerebral blood vessels and cannot move forward, the operator withdraws a small section of the catheter (1), and then transports the hollow guide wire (3) in the catheter (1), and then performs the subsequent steps according to the method of use described in claim 6.

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