Flexible adjustable micro guide wire
By combining a phase change alloy core wire and a temperature regulating component, the flexibility and support of the distal end of the microguidewire can be flexibly adjusted, solving the problem of material property limitations in existing microguidewire technologies and improving safety and adaptability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2026-03-27
AI Technical Summary
Due to limitations in material properties, existing microguidewires are difficult to achieve both flexibility and support at the distal end, resulting in poor performance when crossing thrombi or in conjunction with medical devices, and they are also prone to damaging blood vessels.
By employing a phase change alloy core wire and a temperature regulating component, the hardness configuration of the core wire is changed through heat conduction. Combined with a temperature controller, the flexibility and support can be adjusted to ensure that the distal end of the microguidewire has appropriate flexibility and support under different conditions.
It achieves both flexibility and support at the distal end of the microguidewire, making it more adaptable, with a simple structure, avoiding the risk of damage caused by weak connection points, and improving safety and stability in use.
Smart Images
Figure CN224039759U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to medical instrument technical field especially relates to a flexible adjustable micro guide wire. BACKGROUND
[0002] The micro guide wire is a kind of interventional equipment inserted into micro catheter, provides guide and support, it mainly includes proximal end and distal end, usually push the distal end of micro guide wire into human body when using, until the distal end of micro guide wire reaches target position, but due to the blood vessels of human body are thin and distribute complexly, to ensure reaching target position, the proximal end of micro guide wire needs to have good support, and the distal end needs to have good flexibility and support.
[0003] The core wire in prior art micro guide wire generally uses the same material, so the proximal end and the distal end of micro guide wire have the same hardness, there is the distal end too soft to provide support force in the case needing to cross thrombus or cooperate medical instrument (such as micro catheter, balloon etc.), and also easy to deform and further injure blood vessel, and the hardness of distal end is too large, it is difficult to cross the winding blood vessel to reach target position, it can be seen that the micro guide wire in prior art is difficult to reach the requirement that the distal end has flexibility and support due to the limitation of material characteristics.
[0004] Therefore, it is necessary to research a kind of flexible adjustable micro guide wire to solve the above problems. UTILITY MODEL CONTENT
[0005] To solve the above problems, the purpose of the utility model is to provide a kind of flexible adjustable micro guide wire.
[0006] The utility model realizes by the following technical scheme:
[0007] A kind of flexible adjustable micro guide wire, comprising:
[0008] Phase-change alloy core wire, with first hardness configuration and second hardness configuration;
[0009] Temperature regulating member, with the heat conduction connection of phase-change alloy core wire;
[0010] When the temperature regulating member absorbs the heat of phase-change alloy core wire, phase-change alloy core wire is second hardness configuration, when the temperature regulating member conducts heat to phase-change alloy core wire, phase-change alloy core wire is first hardness configuration, the hardness of first hardness configuration is higher than the hardness of second hardness configuration;
[0011] Temperature controller, with the electrical connection of temperature regulating member.
[0012] In a possible implementation, the temperature range causing the phase-changeable alloy core wire to transform from the second hardness configuration to the first hardness configuration is 27-36 DEG C.
[0013] In a possible implementation, the first hardness and the second hardness satisfy the following relationship:
[0014] h1= a x h2, wherein h1 is the hardness of the phase-changeable alloy core wire in the second hardness configuration, h2 is the hardness of the phase-changeable alloy core wire in the first hardness configuration, and a is in the range of 0.7-0.8.
[0015] In a possible implementation, the temperature adjusting member is provided with a temperature adjusting portion, and a connection length of the phase-changeable alloy core wire in thermal conduction connection with the temperature adjusting portion accounts for 15-20% of the total length of the phase-changeable alloy core wire.
[0016] In a possible implementation, the temperature adjusting portion is provided with a receiving hole, the phase-changeable alloy core wire is movably arranged in the receiving hole, and an inner wall of the receiving hole is in thermal conduction connection with the phase-changeable alloy core wire.
[0017] In a possible implementation, the temperature adjusting portion includes a first temperature adjusting portion and a second temperature adjusting portion in detachable connection.
[0018] The first temperature adjusting portion and the second temperature adjusting portion are connected to form the receiving hole, and an inner side wall of the first temperature adjusting portion is in abutment with the phase-changeable alloy core wire.
[0019] An inner side wall of the second temperature adjusting portion is in abutment with the phase-changeable alloy core wire.
[0020] In a possible implementation, the temperature adjusting member includes a first elastic member and a second elastic member.
[0021] The first elastic member is fixedly connected with an outer side wall of the first temperature adjusting portion, and the first elastic member can provide pressure to the first temperature adjusting portion to make the outer side wall of the first temperature adjusting portion abut against the phase-changeable alloy core wire.
[0022] The second elastic member is fixedly connected with an outer side wall of the second temperature adjusting portion, and the second elastic member can provide pressure to the second temperature adjusting portion to make the outer side wall of the second temperature adjusting portion abut against the phase-changeable alloy core wire.
[0023] In a possible implementation, the temperature adjusting member includes a first mounting member and a second mounting member in detachable connection.
[0024] The first mounting member is provided with a first recess, and the second mounting member is provided with a second recess.
[0025] The first temperature adjusting part can be accommodated in the first groove and elastically connected with the first mounting part through the first elastic part.
[0026] The second temperature adjusting part can be accommodated in the second groove and elastically connected with the second mounting part through the second elastic part.
[0027] In a possible implementation, the inner side edges of the two ends of the temperature adjusting part are provided with chamfered parts.
[0028] In a possible implementation, an insulating and heat conducting layer is arranged on the inner wall of the temperature adjusting part.
[0029] The utility model has the following beneficial effects:
[0030] The utility model discloses a flexible adjustable micro guide wire, including phase change alloy core wire, temperature adjusting part and temperature controller, temperature adjusting part and phase change alloy core wire heat conduction connection, temperature adjusting part can absorb the heat of phase change alloy core wire or conduct heat to phase change alloy core wire to cause phase change alloy core wire between first hardness configuration and second hardness configuration's change, through adopting phase change alloy core wire, make micro guide wire have different hardness, on this basis, adopt temperature adjusting part to cause phase change alloy core wire's hardness change, and then change the flexibility of micro guide wire, make its distal end's flexibility and support property have simultaneously, adopt temperature controller simultaneously, make it with temperature adjusting part electricity is connected, and then can adjust the temperature of temperature adjusting part, realizes the quick adjustment of the flexibility of micro guide wire, in addition, the micro guide wire in the utility model changes its flexibility through the mode of heat conduction, and the overall structure is simple and does not have sheath kind requirement, and the adaptation range is wider. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the technical scheme and advantages of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.
[0032] Figure 1 The structure schematic diagram of the micro guide wire provided by the embodiment of the disclosure.
[0033] Figure 2 The transverse sectional view of the first mounting part provided by the embodiment of the disclosure.
[0034] Figure 3 The longitudinal sectional view of the first mounting part provided by the embodiment of the disclosure.
[0035] Figure 4 A transverse sectional view of the first mounting member provided by the embodiment of the present disclosure;
[0036] Figure 5 A structural schematic diagram of the temperature adjusting member when the phase-changeable alloy core wire does not pass through the temperature adjusting member.
[0037] Figure 6 A structural schematic diagram of the temperature adjusting member when the phase-changeable alloy core wire passes through the temperature adjusting member.
[0038] Figure 7 A structural schematic diagram of the first temperature adjusting part provided by the embodiment of the present disclosure.
[0039] Figure 8 A structural schematic diagram of the phase-changeable alloy core wire provided by the embodiment of the present disclosure.
[0040] Figure 9 A structural schematic diagram of the phase-changeable alloy core wire provided by the embodiment of the present disclosure.
[0041] Figure 10 : Figure 8 An enlarged view of A in FIG.
[0042] In the figure: 1-phase-changeable alloy core wire, 11-flexible section, 12-support section, 13-developing spring, 14-sheath, 2-temperature adjusting member, 21-first temperature adjusting part, 201-first metal layer, 202-second metal layer, 203-first semiconductor layer, 22-second temperature adjusting part, 23-first elastic member, 24-second elastic member, 25-first mounting member, 251-first mounting cavity, 252-first connecting site, 253-second connecting site, 26-second mounting member, 3-temperature controller, 4-first connecting line, 5-second connecting line. DETAILED DESCRIPTION
[0043] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0044] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of the present utility model as well as the above-described drawings, are used to distinguish similar objects, and do not necessarily have to be used in a particular sequential or chronological order. It is to be understood that the terms used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" as well as any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product, or apparatus that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products, or apparatuses.
[0045] The embodiments will be described below with reference to the accompanying drawings, which do not limit the disclosure recorded in the claims in any way.
[0046] The proximal end of the micro guide wire is close to the doctor, and the distal end of the micro guide wire is away from the doctor.
[0047] The following will be described in conjunction with the accompanying drawings Figures 1-10 The flexible adjustable micro guide wire provided by the embodiments of the present utility model is introduced as follows, Figure 1 As shown in the drawings, comprising:
[0048] The phase-change alloy core wire 1 has a first hardness configuration and a second hardness configuration.
[0049] The temperature adjusting member 2 is in thermal conduction connection with the phase-change alloy core wire 1.
[0050] When the temperature adjusting member 2 absorbs the heat of the phase-change alloy core wire 1, the phase-change alloy core wire 1 is in the second hardness configuration, and when the temperature adjusting member 2 conducts heat to the phase-change alloy core wire 1, the phase-change alloy core wire 1 is in the first hardness configuration, and the hardness of the first hardness configuration is higher than that of the second hardness configuration.
[0051] The temperature controller 3 is electrically connected with the temperature adjusting part 2. By adopting the phase-changeable alloy core wire, the micro guide wire has different hardness, on the basis, the temperature adjusting part 2 is adopted to cause the phase-changeable alloy core wire 1 to transform between the first hardness configuration and the second hardness configuration, and then the flexibility of the micro guide wire is changed, the flexibility and the supportability of the distal end are combined, the temperature controller 3 is adopted to be electrically connected with the temperature adjusting part 2, and then the temperature of the temperature adjusting part 2 can be adjusted, the rapid adjustment of the flexibility of the micro guide wire is realized, the flexibility of the micro guide wire in the utility model is changed by the heat conduction mode, the overall structure is simple, and there is no sheath 14 kind requirement, the adaptation range is wider, in addition, in the prior art, in order to make the proximal end and the distal end of the micro guide wire reach different performance requirements, the intermediate connection process is adopted, but the strength of the connection part is weak, and the human body is damaged by easy breakage, the phase-changeable alloy core wire 1 in the application is integrally formed, the structure is simple, the safety performance is higher, and the problem that the human body is damaged by the weak connection strength does not exist.
[0052] As shown in some embodiments, Figures 8-10 The micro guide wire includes the sheath 14 and the developing spring 13, the phase-changeable alloy core wire 1 has the support section 12 and the flexible section 11, the flexible section 11 is located at the distal end of the phase-changeable alloy core wire 1, the support section 12 is located at the proximal end of the phase-changeable alloy core wire, the developing spring 13 is arranged on the flexible section 11, the sheath 14 covers part of the flexible section 11, and the developing spring 13 is located inside the sheath 14.
[0053] Specifically, the micro guide wire includes a hydrophilic coating, and the hydrophilic coating is coated on the outside of the sheath 14.
[0054] In some embodiments, the temperature range for causing the phase-changeable alloy core wire 1 to transform from the second hardness configuration to the first hardness configuration is 27-36℃. By setting the temperature range for causing the hardness of the phase-changeable alloy core wire 1 to transform, the temperature can be close to the human body temperature, when the micro guide wire enters the human blood vessel, the hardness of the first hardness configuration can be quickly reached, the support performance is good, and then the path can be quickly established to reach the target position, and the target position is the position where the flexibility of the micro guide wire needs to be changed again. When the micro guide wire passes through the tortuous blood vessel, the flexibility and the positioning property of the micro guide wire need to be improved, the micro guide wire is cooled and reaches the second hardness configuration, and the micro guide wire becomes soft at this time.
[0055] In some embodiments, the temperature range for causing the phase-changeable alloy core wire 1 to transform from the second hardness configuration to the first hardness configuration is 32-36℃. By further setting the temperature range to be close to the human body temperature, the micro guide wire can quickly establish the path to reach the target position, and the hardness of the micro guide wire can be quickly adjusted during the operation process, so that the supportability and the flexibility are combined.
[0056] In some embodiments, the first hardness and the second hardness satisfy the following relationship:
[0057] h1 = a x h2, wherein h1 is the hardness of the shape memory alloy core wire 1 in the second hardness configuration, h2 is the hardness of the shape memory alloy core wire 1 in the first hardness configuration, and a is in the range of 0.7 to 0.8. By setting the above relationship, the hardness of the shape memory alloy core wire 1 in the transition is not greatly different, and the problem that the rigidity of the core wire is too strong and may damage the inner wall of the blood vessel is avoided.
[0058] In some embodiments, the shape memory alloy core wire 1 has a third hardness configuration, a fourth hardness configuration, and a fifth hardness configuration. The hardness of the shape memory alloy core wire 1 in the third hardness configuration is a third hardness, the hardness of the shape memory alloy core wire 1 in the fourth hardness configuration is a fourth hardness, and the hardness of the shape memory alloy core wire 1 in the fifth hardness configuration is a fifth hardness. The third hardness, the fourth hardness, and the fifth hardness increase in turn.
[0059] In some embodiments, the material of the shape memory alloy core wire 1 can be a shape memory alloy.
[0060] Specifically, the shape memory alloy can be one of a nickel-titanium-based shape memory alloy, a copper-based shape memory alloy, or a iron-based shape memory alloy.
[0061] For example, the shape memory alloy core wire 1 is a nickel-titanium-based shape memory alloy, the first hardness configuration is an austenite phase, and the second hardness configuration is a martensite phase. Accordingly, the temperature at which the shape memory alloy core wire 1 is caused to transition from the second hardness configuration to the first hardness configuration is an austenite transition completion temperature.
[0062] In some embodiments, as shown in Figure 5 The temperature adjusting part is provided with a receiving hole, the shape memory alloy core wire 1 is movably arranged in the receiving hole, and the inner wall of the receiving hole is in thermal conduction connection with the shape memory alloy core wire 1. The receiving hole is arranged in the temperature adjusting part, which is to enable the shape memory alloy core wire 1 to pass through smoothly and to increase the contact area between the shape memory alloy core wire 1 and the temperature adjusting part, thereby improving the heat transfer efficiency.
[0063] In some embodiments, as shown in Figure 5 The temperature adjusting part includes a first temperature adjusting part 21 and a second temperature adjusting part 22 which are detachably connected.
[0064] The first temperature adjusting part 21 and the second temperature adjusting part 22 are connected to form a receiving hole, and the inner side wall of the first temperature adjusting part 21 abuts against the shape memory alloy core wire.
[0065] The inner side wall of the second temperature adjusting part 22 is in abutment with the phase-changeable alloy core wire 1. The abutment connection mode is adopted to connect the phase-changeable alloy core wire 1, so that the temperature adjusting part is in closer contact with the phase-changeable alloy core wire 1, the heat transfer efficiency is higher, and the flexibility of the phase-changeable alloy core wire 1 can be quickly adjusted.
[0066] In some embodiments, as shown in Figure 1 The temperature adjusting part 2 is provided with a temperature adjusting part, and the connection length of the phase-changeable alloy core wire 1 and the temperature adjusting part in heat conduction connection accounts for 15-20% of the total length of the phase-changeable alloy core wire 1. Since there is a certain distance between the temperature adjusting part and the distal end of the phase-changeable alloy core wire 1, some heat will inevitably be lost in the process of heat conduction, which may cause the distal end to fail to reach the required hardness. In order to solve this problem, the above connection length is limited to account for 15-20% of the total length of the phase-changeable alloy core wire 1, so as to avoid the loss of heat in the process of heat conduction.
[0067] Specifically, the connection length of the phase-changeable alloy core wire 1 and the first temperature adjusting part 21 in heat conduction connection accounts for 15-20% of the total length of the phase-changeable alloy core wire 1, and the connection length of the phase-changeable alloy core wire 1 and the second temperature adjusting part 22 in heat conduction connection accounts for 15-20% of the total length of the phase-changeable alloy core wire 1.
[0068] In some embodiments, as shown in Figures 2-3 The temperature adjusting part 2 includes a first elastic member 23 and a second elastic member 24.
[0069] The first elastic member 23 is fixedly connected with the outer side wall of the first temperature adjusting part 21, and the first elastic member 23 can provide pressure to the first temperature adjusting part 21 to make the outer side wall of the first temperature adjusting part 21 abut with the phase-changeable alloy core wire 1;
[0070] The second elastic member 24 is fixedly connected with the outer side wall of the second temperature adjusting part 22, and the second elastic member 24 can provide pressure to the second temperature adjusting part 22 to make the outer side wall of the second temperature adjusting part 22 abut with the phase-changeable alloy core wire 1. By adopting the first elastic member 23 and the second elastic member 24, the phase-changeable alloy core wire 1 is in close connection with the first temperature adjusting part 21 and the second temperature adjusting part 22, the stability and reliability of the connection are improved, and the heat transfer efficiency is higher.
[0071] Specifically, the fixed connection mode of the first elastic member 23 and the outer side wall of the first temperature adjusting part 21 can be adhesion, welding, etc., which is not limited in the present application, as long as the first elastic member 23 and the outer side wall of the first temperature adjusting part 21 are fixedly connected.
[0072] Specifically, the second elastic member 24 and the outer side wall of the second temperature adjusting part 22 can be fixedly connected by adhesion, welding or the like, which is not limited in the present application, as long as the second elastic member 24 and the outer side wall of the second temperature adjusting part 22 are fixedly connected.
[0073] In some embodiments, as shown in Figure 5 and Figure 6 The temperature adjusting member 2 comprises a first mounting member 25 and a second mounting member 26 which are detachably connected.
[0074] The first mounting member 25 is provided with a first recess, and the second mounting member 26 is provided with a second recess.
[0075] The first temperature adjusting part 21 can be accommodated in the first recess and elastically connected with the first mounting member 25 through the first elastic member 23.
[0076] The second temperature adjusting part 22 can be accommodated in the second recess and elastically connected with the second mounting member 26 through the second elastic member 24. With this arrangement, the stability of the micro guide wire during use is stronger.
[0077] In some embodiments, as shown in Figures 2-3 The first recess is provided with a first mounting cavity 251 in the radial direction of the shape memory alloy core wire 1, and the second recess is provided with a second mounting cavity in the radial direction of the shape memory alloy core wire 1.
[0078] One end of the first elastic member 23 is fixedly connected with the side wall of the first mounting cavity 251, and the other end is fixedly connected with the first temperature adjusting part 21.
[0079] One end of the second elastic member 24 is fixedly connected with the side wall of the second mounting cavity, and the other end is fixedly connected with the second temperature adjusting part 22.
[0080] Specifically, the first mounting cavity 251 and the first elastic member 23 can be provided in multiple along the axial direction of the shape memory alloy core wire 1. Preferably, the number of the first mounting cavity 251 and the first elastic member 23 is 7.
[0081] Specifically, one end of the first elastic member 23 protrudes from the surface of the first recess and is fixedly connected with the first temperature adjusting part 21, and one end of the second elastic member 24 protrudes from the surface of the second recess and is fixedly connected with the second temperature adjusting part 22.
[0082] In some embodiments, as shown in Figure 1As shown, the micro guide wire includes a first connecting line 4 and a second connecting line 5, the first mounting member 25 is provided with a first connecting site 252 and a second connecting site 253, the second mounting member 26 is provided with a third connecting site and a fourth connecting site, the first connecting site 252 and the third connecting site are connected to form a first connecting hole, the second connecting site 253 and the fourth connecting site are connected to form a second connecting hole, the first connecting line 4 is electrically connected with the first temperature adjusting part 21 after passing through the first connecting hole, and the second connecting line 5 is electrically connected with the second temperature adjusting part 22 after passing through the second connecting hole.
[0083] In some embodiments, the temperature controller 3 is provided with a power switch for controlling the opening and closing of the temperature controller 3.
[0084] In some embodiments, the micro guide wire includes a first controller and a second controller, the first controller is used for controlling the opening and closing of the first control unit, and the second controller is used for controlling the opening of the second control unit.
[0085] In some embodiments, as shown in Figure 1 The temperature controller 3 is electrically connected with the first temperature adjusting part 21 through the first connecting line 4 and is electrically connected with the second temperature adjusting part 22 through the second connecting line 5.
[0086] Specifically, the temperature controller 3 includes a first control unit and a second control unit, the first control unit is used for generating a certain forward current to the first temperature adjusting part 21 and the second temperature adjusting part 22 to reduce the temperature of the phase-changeable alloy core wire 1, and the second control unit is used for generating a certain reverse current to the first temperature adjusting part 21 and the second temperature adjusting part 22 to increase the temperature of the phase-changeable alloy core wire 1. When the forward current is generated, the temperature adjusting part is in a heat absorbing state, so that the phase-changeable alloy core wire 1 is reduced to a certain temperature, at this time, the phase-changeable alloy core wire 1 is in a second hardness configuration, and the hardness is correspondingly high, when the reverse current is generated, the temperature adjusting part is in a heating state, so that the phase-changeable alloy core wire 1 is increased to a certain temperature, at this time, the phase-changeable alloy core wire 1 is in a first hardness configuration, and the hardness is correspondingly low.
[0087] In some embodiments, as shown in Figure 7 The first temperature adjusting part 21 has a first metal layer 201, a first semiconductor layer 203 and a second metal layer 202, the first semiconductor layer 203 is sandwiched between the first metal layer 201 and the second metal layer 202, the first metal layer 201 is arranged on the side of the first semiconductor layer 203 away from the phase-changeable alloy core wire 1, and the second metal layer 202 is arranged on the side of the first semiconductor layer 203 close to the phase-changeable alloy core wire 1.
[0088] Specifically, the first connecting line 4 is electrically connected with the first metal layer 201. When a forward current is generated, the second metal layer 202 absorbs the heat of the shape memory alloy wire 1, at this time the hardness of the shape memory alloy wire 1 is high, and the first semiconductor layer 203 is in a heating state, when a reverse current is generated, the second metal layer 202 conducts heat to the shape memory alloy wire 1, and the first semiconductor layer 203 is in a heat absorbing state, at this time the shape memory alloy wire 1 absorbs the heat transferred by the second metal layer 202, and the hardness is correspondingly low.
[0089] Specifically, the first connecting line 4 is fixedly connected with the first metal layer 201 by welding to realize the electrical connection between the first connecting line 4 and the first metal layer 201.
[0090] In some embodiments, the second temperature adjusting part 22 has a third metal layer, a second semiconductor layer and a fourth metal layer, the second semiconductor layer is arranged between the third metal layer and the fourth metal layer, the third metal layer is arranged on the side of the second semiconductor layer away from the shape memory alloy wire 1, and the fourth metal layer is arranged on the side of the second semiconductor layer close to the shape memory alloy wire 1.
[0091] Specifically, the second connecting line 5 is electrically connected with the third metal layer. When a forward current is generated, the fourth metal layer absorbs the heat of the shape memory alloy wire 1, at this time the hardness of the shape memory alloy wire 1 is high, and the second semiconductor layer is in a heating state, when a reverse current is generated, the fourth metal layer conducts heat to the shape memory alloy wire 1, and the second semiconductor layer is in a heat absorbing state, at this time the shape memory alloy wire 1 absorbs the heat transferred by the fourth metal layer 202, and the hardness is correspondingly low.
[0092] Specifically, the second connecting line 5 is fixedly connected with the third metal layer by welding to realize the electrical connection between the second connecting line 5 and the third metal layer.
[0093] In some embodiments, the first temperature adjusting part 21 includes a plurality of first temperature adjusting units, and the plurality of first temperature adjusting units are connected along the axial direction of the shape memory alloy wire 1 to form the first temperature adjusting part 21. The second temperature adjusting part 22 includes a plurality of second temperature adjusting units, and the plurality of second temperature adjusting units are connected along the axial direction of the shape memory alloy wire 1 to form the second temperature adjusting part 22.
[0094] In some embodiments, the inner side edges of the two ends of the temperature adjusting part are provided with chamfered parts. By providing the chamfered parts, when the shape memory alloy wire 1 is inserted into the temperature adjusting part, the inner side edges of the two ends of the temperature adjusting part are not too sharp to easily damage the surface of the shape memory alloy wire 1, and the service life of the micro guide wire is improved.
[0095] In some embodiments, the first temperature adjusting part 21 is provided with a first chamfered part at the inner side edge of both ends along the axial direction of the phase-changeable alloy core wire 1, and the second temperature adjusting part 22 is provided with a second chamfered part at the inner side edge of both ends along the axial direction of the phase-changeable alloy core wire 1.
[0096] In some embodiments, the inner wall of the temperature adjusting part is provided with an insulating and heat-conducting layer. By arranging the insulating and heat-conducting layer, the phase-changeable alloy core wire 1 and the temperature adjusting part are prevented from conducting electricity when they are in contact, and meanwhile, the phase-changeable alloy core wire 1 and the temperature adjusting part have good heat-conducting effect when they are in contact.
[0097] In some embodiments, the inner wall of the first temperature adjusting part 21 is provided with a first insulating and heat-conducting layer, and the inner wall of the second temperature adjusting part 22 is provided with a second insulating and heat-conducting layer. Specifically, the material of the first insulating and heat-conducting layer and the second insulating and heat-conducting layer is alumina.
[0098] The specific embodiments of the utility model are introduced below based on the above technical solutions.
[0099] Embodiment one
[0100] A flexible and adjustable micro guide wire, comprising a phase-changeable alloy core wire 1, a developing spring 13, a sheath 14, a temperature adjusting part 2, a temperature controller 3, a first connecting wire 4 and a second connecting wire 5. The temperature adjusting part 2 comprises a first temperature adjusting part 21 and a second temperature adjusting part 22 which are detachably connected. The first temperature adjusting part 21 and the second temperature adjusting part 22 are connected to form a containing hole. The inner side wall of the first temperature adjusting part 21 is in abutment with the phase-changeable alloy core wire 1, and the inner side wall of the second temperature adjusting part 22 is in abutment with the phase-changeable alloy core wire 1. The phase-changeable alloy core wire 1 is movably arranged in the containing hole. The temperature controller 3 is electrically connected with the temperature adjusting part 2 through the first connecting wire 4 and the second connecting wire 5.
[0101] The phase-changeable alloy core wire 1 has a supporting section 12 and a flexible section 11. The developing spring 13 is arranged on the flexible section 11, and the sheath 14 is partially wrapped on the flexible section 11. The developing spring 13 is located inside the sheath 14. Specifically, the micro guide wire comprises a hydrophilic coating layer which is wrapped on the outer side of the sheath 14.
[0102] The phase-change alloy core wire 1 has a first hardness configuration and a second hardness configuration, the phase-change alloy core wire 1 is in the second hardness configuration when the temperature adjusting member 2 absorbs heat of the phase-change alloy core wire 1, the phase-change alloy core wire 1 is in the first hardness configuration when the temperature adjusting member 2 conducts heat to the phase-change alloy core wire 1, the hardness of the first hardness configuration is higher than the hardness of the second hardness configuration. In the embodiment, the material of the phase-change alloy core wire 1 is shape memory alloy, the temperature range causing the phase-change alloy core wire 1 to change from the second hardness configuration to the first hardness configuration is 32-36℃. The first hardness and the second hardness satisfy the following relationship: h1 = α × h2, wherein h1 is the hardness of the phase-change alloy core wire 1 in the second hardness configuration, h2 is the hardness of the phase-change alloy core wire 1 in the first hardness configuration, and in the embodiment, the value range of α is 0.7-0.8.
[0103] The connection length of the heat conduction connection between the phase-change alloy core wire 1 and the first temperature adjusting part 21 accounts for 15-20% of the total length of the phase-change alloy core wire 1, and the connection length of the heat conduction connection between the phase-change alloy core wire 1 and the second temperature adjusting part 22 accounts for 15-20% of the total length of the phase-change alloy core wire 1.
[0104] The first temperature adjusting part 21 is provided with a first chamfer part at the inner side edges of the two ends in the axial direction of the phase-change alloy core wire 1, the second temperature adjusting part 22 is provided with a second chamfer part at the inner side edges of the two ends in the axial direction of the phase-change alloy core wire 1, the inner wall of the first temperature adjusting part 21 is provided with a first insulating and heat conducting layer, and the inner wall of the second temperature adjusting part 22 is provided with a second insulating and heat conducting layer. Specifically, the materials of the first insulating and heat conducting layer and the second insulating and heat conducting layer are both alumina.
[0105] The temperature adjusting member 2 includes a first mounting member 25 and a second mounting member 26 which are detachably connected, the first mounting member 25 is provided with a first recess, the second mounting member 26 is provided with a second recess, the first temperature adjusting part 21 can be accommodated in the first recess and elastically connected with the first mounting member 25 through the first elastic member 23, and the second temperature adjusting part 22 can be accommodated in the second recess and elastically connected with the second mounting member 26 through the second elastic member 24.
[0106] Specifically, the first mounting member 25 is provided with a first connecting position 252 and a second connecting position 253, the second mounting member 26 is provided with a third connecting position and a fourth connecting position, the first connecting position 252 and the third connecting position are connected to form a first connecting hole, the second connecting position 253 and the fourth connecting position are connected to form a second connecting hole, the first connecting wire 4 is electrically connected with the first temperature adjusting part 21 after passing through the first connecting hole, and the second connecting wire 5 is electrically connected with the second temperature adjusting part 22 after passing through the second connecting hole.
[0107] The temperature controller 3 is electrically connected with the first temperature regulating part 21 through a first connecting line 4 and electrically connected with the second temperature regulating part 22 through a second connecting line 5.
[0108] Specifically, the first temperature regulating part 21 has a first metal layer 201, a first semiconductor layer 203 and a second metal layer 202, the first semiconductor layer 203 is sandwiched between the first metal layer 201 and the second metal layer 202, the first metal layer 201 is arranged on the side of the first semiconductor layer 203 away from the phase-changeable alloy filament 1, and the second metal layer 202 is arranged on the side of the first semiconductor layer 203 close to the phase-changeable alloy filament 1. Specifically, the first connecting line 4 is electrically connected with the first metal layer 201.
[0109] Specifically, the second temperature regulating part 22 has a third metal layer, a second semiconductor layer and a fourth metal layer, the second semiconductor layer is sandwiched between the third metal layer and the fourth metal layer, the third metal layer is arranged on the side of the second semiconductor layer away from the phase-changeable alloy filament 1, and the fourth metal layer is arranged on the side of the second semiconductor layer close to the phase-changeable alloy filament 1. Specifically, the second connecting line 5 is electrically connected with the third metal layer.
[0110] The temperature controller 3 comprises a first control unit and a second control unit, the first control unit is used to generate a certain forward current to the first temperature regulating part 21 and the second temperature regulating part 22 to reduce the temperature of the phase-changeable alloy filament 1, and the second control unit is used to generate a certain reverse current to the first temperature regulating part 21 and the second temperature regulating part 22 to increase the temperature of the phase-changeable alloy filament 1.
[0111] The temperature controller 3 is provided with a power switch for controlling the opening and closing of the temperature controller 3.
[0112] The micro guide wire comprises a first controller and a second controller, the first controller is used to control the opening and closing of the first control unit, and the second controller is used to control the opening of the second control unit.
[0113] The working process of the micro guide wire of the embodiment is as follows: before the temperature controller 3 is turned on, the flexible section 11 of the shape memory alloy core wire 1 is first pushed into the blood vessel, at this time, the temperature of the shape memory alloy core wire 1 is increased due to the body temperature, so that the shape memory alloy core wire 1 is changed from the second hardness configuration to the first hardness configuration, and the hardness is correspondingly increased, when the flexible section 11 reaches the tortuous blood vessel, the temperature controller 3 is turned on, and the first control unit is turned on, so as to reduce the temperature of the shape memory alloy core wire 1 until the shape memory alloy core wire 1 is changed from the first hardness configuration to the second hardness configuration, and the hardness is correspondingly reduced, when the flexible section 11 passes through the tortuous blood vessel, the second control unit is turned on, so as to increase the temperature of the shape memory alloy core wire 1 until the shape memory alloy core wire 1 is changed from the second hardness configuration to the first hardness configuration, and the hardness is correspondingly increased, or when the flexible section 11 passes through the tortuous blood vessel, the temperature controller 3 is turned off, and the temperature of the shape memory alloy core wire 1 is directly increased through the body temperature, so that the shape memory alloy core wire 1 is changed from the second hardness configuration to the first hardness configuration, and the hardness is correspondingly increased
[0114] Embodiment two
[0115] The embodiment provides a flexible adjustable micro guide wire, which is the same as the flexible adjustable micro guide wire of the first embodiment, and the difference between the second embodiment and the first embodiment is that the temperature adjusting member comprises a first elastic member 23 and a second elastic member 24, the first elastic member 23 is fixedly connected with the outer side wall of the first temperature adjusting part 21, the first elastic member 23 can provide pressure to the first temperature adjusting part 21 so that the outer side wall of the first temperature adjusting part 21 abuts against the shape memory alloy core wire 1, and the second elastic member 24 is fixedly connected with the outer side wall of the second temperature adjusting part 22, the second elastic member 24 can provide pressure to the second temperature adjusting part 22 so that the outer side wall of the second temperature adjusting part 22 abuts against the shape memory alloy core wire 1.
[0116] The first recess is provided with a first mounting cavity 251 in the radial direction of the shape memory alloy core wire 1, the second recess is provided with a second mounting cavity in the radial direction of the shape memory alloy core wire 1, one end of the first elastic member 23 is fixedly connected with the side wall of the first mounting cavity 251, and the other end is fixedly connected with the first temperature adjusting part 21, one end of the second elastic member 24 is fixedly connected with the side wall of the second mounting cavity, and the other end is fixedly connected with the second temperature adjusting part 22. Specifically, the number of the first mounting cavity 251 and the first elastic member 23 in the axial direction of the shape memory alloy core wire 1 is 7; specifically, one end of the first elastic member 23 protrudes from the surface of the first recess and is fixedly connected with the first temperature adjusting part 21, and one end of the second elastic member 24 protrudes from the surface of the second recess and is fixedly connected with the second temperature adjusting part 22.
[0117] Although the utility model has been described through preferred embodiments, the utility model is not limited to the embodiments described herein, and various changes and variations made without departing from the scope of the utility model.
[0118] In this article, the "front", "back", "up", "down" and other orientation words are defined with the parts in the figure and the position of the parts relative to each other in the figure, just to express the technical scheme clearly and conveniently. It should be understood that the use of orientation words should not limit the scope of the utility model claimed.
[0119] In the case of no conflict, the above-mentioned embodiments and features in the embodiments can be combined with each other.
[0120] The above disclosed is only a preferred embodiment of the utility model, of course, cannot limit the scope of the utility model right with this, therefore, the equivalent changes made according to the utility model claim still belong to the scope covered by the utility model.
Claims
1. A flexible adjustable micro-wire, characterized in that, The application relates to a temperature-adjusting device for a phase-change alloy core wire (1) of a temperature-adjusting device, which comprises the following components: a phase-change alloy core wire (1) having a first hardness configuration and a second hardness configuration; a temperature-adjusting component (2) in thermal conduction connection with the phase-change alloy core wire (1); when the temperature-adjusting component (2) absorbs heat from the phase-change alloy core wire (1), the phase-change alloy core wire (1) is in the second hardness configuration, and when the temperature-adjusting component (2) conducts heat to the phase-change alloy core wire (1), the phase-change alloy core wire (1) is in the first hardness configuration, wherein the hardness of the first hardness configuration is higher than that of the second hardness configuration; a temperature controller (3) in electrical connection with the temperature-adjusting component (2). The temperature range for causing the phase-change alloy core wire (1) to change from the second hardness configuration to the first hardness configuration is 27-36 DEG C. The first hardness and the second hardness satisfy the following relationship: h1 = alpha * h2, wherein h1 is the hardness of the phase-change alloy core wire (1) in the second hardness configuration, h2 is the hardness of the phase-change alloy core wire (1) in the first hardness configuration, and the value range of alpha is 0.7-0.
8. The temperature-adjusting component (2) is provided with a temperature-adjusting part, and the length of the thermal conduction connection between the phase-change alloy core wire (1) and the temperature-adjusting part accounts for 15-20% of the total length of the phase-change alloy core wire (1). The temperature-adjusting part is provided with a containing hole, the phase-change alloy core wire (1) is movably arranged in the containing hole, and the inner wall of the containing hole is in thermal conduction connection with the phase-change alloy core wire (1).
2. The micro-wire of claim 1, wherein, The temperature-adjusting component (2) comprises a first temperature-adjusting part (21) and a second temperature-adjusting part (22) in detachable connection.
3. The micro-wire of claim 1, wherein, The first temperature-adjusting part (21) and the second temperature-adjusting part (22) are connected to form the containing hole, and the inner side wall of the first temperature-adjusting part (21) is in abutment with the phase-change alloy core wire (1). The inner side wall of the second temperature-adjusting part (22) is in abutment with the phase-change alloy core wire (1).
4. The micro-wire guide of claim 1, wherein, The temperature-adjusting component (2) comprises a first elastic component (23) and a second elastic component (24).
5. The micro-wire of any one of claims 1-4, wherein, The first elastic component (23) is fixedly connected with the outer side wall of the first temperature-adjusting part (21), and the first elastic component (23) can provide pressure to the first temperature-adjusting part (21) to make the outer side wall of the first temperature-adjusting part (21) abut against the phase-change alloy core wire (1).
6. The micro-wire guide of claim 5, wherein, The second elastic component (24) is fixedly connected with the outer side wall of the second temperature-adjusting part (22), and the second elastic component (24) can provide pressure to the second temperature-adjusting part (22) to make the outer side wall of the second temperature-adjusting part (22) abut against the phase-change alloy core wire (1). The temperature-adjusting component (2) comprises a first mounting component (25) and a second mounting component (26) in detachable connection. The first mounting component (25) is provided with a first recess, and the second mounting component (26) is provided with a second recess.
7. The micro-wire of claim 6, wherein, The first temperature-adjusting part (21) can be accommodated in the first recess and elastically connected with the first mounting component (25) through the first elastic component (23). 8. The micro-wire guide of claim 7, wherein, The second temperature adjusting part (22) can be accommodated in the second groove and elastically connected with the second mounting part (26) through the second elastic part (24).
9. The micro-wire guide of claim 5, wherein, The inner side edges of both ends of the temperature adjusting part are provided with chamfered parts.
10. The micro-wire guide of claim 5, wherein, An insulating and heat conducting layer is arranged on the inner wall of the temperature adjusting part.