CN116637275B - Controllable guide wire - Google Patents
Controllable guide wire Download PDFInfo
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- CN116637275B CN116637275B CN202310668769.XA CN202310668769A CN116637275B CN 116637275 B CN116637275 B CN 116637275B CN 202310668769 A CN202310668769 A CN 202310668769A CN 116637275 B CN116637275 B CN 116637275B
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- guide wire
- shape memory
- memory alloy
- main body
- guidewire
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- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 66
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical group [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 4
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 2
- 229910001080 W alloy Inorganic materials 0.000 claims description 2
- PCLURTMBFDTLSK-UHFFFAOYSA-N nickel platinum Chemical compound [Ni].[Pt] PCLURTMBFDTLSK-UHFFFAOYSA-N 0.000 claims description 2
- ZONODCCBXBRQEZ-UHFFFAOYSA-N platinum tungsten Chemical compound [W].[Pt] ZONODCCBXBRQEZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 15
- 210000004204 blood vessel Anatomy 0.000 abstract description 10
- 230000000903 blocking effect Effects 0.000 description 27
- 230000002792 vascular Effects 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003902 lesion Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000013152 interventional procedure Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09133—Guide wires having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque
- A61M2025/09141—Guide wires having specific material compositions or coatings; Materials with specific mechanical behaviours, e.g. stiffness, strength to transmit torque made of shape memory alloys which take a particular shape at a certain temperature
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The application discloses a controllable guide wire, which comprises a guide wire main body, wherein an operation part is arranged on the proximal end of the guide wire main body, a deformation part and a shape memory alloy are arranged at the distal end of the guide wire main body, the shape memory alloy has a first state and a second state at different temperatures, and the shape memory alloy enables the directions of the deformation parts to be different in the first state and the second state. After the guide wire main body enters a human blood vessel, a doctor applies temperature to the shape memory alloy through the operation part, the states of the shape memory alloy are different at different temperatures, the shape memory alloy enables the directions of the deformation parts to be different, the deformation parts enable the angle of the distal end of the guide wire main body to be different, and therefore the bending degree of the guide wire main body is different at different blood vessel parts, and the directions of the deformation parts are changed by applying the temperature to the shape memory alloy so as to change the angle of the distal end of the guide wire main body.
Description
Technical Field
The application relates to the field of medical instruments, in particular to a guide wire product of a conventional auxiliary medical instrument for minimally invasive vascular interventional therapy, and in particular relates to a controllable guide wire.
Background
As is known, interventional guidewires are the most commonly used instruments for interventional procedures, and an endoluminal procedure usually requires a guidewire as a guide, and currently, the vessel interventional guidewires on the market mainly comprise a core and a spring at the head end, wherein the core can be made of one material or a strong supporting material such as stainless steel and a super-elastic material of a distal nickel-titanium alloy, the distal end of the core is ground and tapered, and the distal spring is coated with a hydrophilic coating to reduce friction resistance or coated with a high polymer material after the spring is coated with the coating to reduce friction resistance.
Shape memory alloys are a unique class of alloys that have the ability to "remember" their shape, recover to that shape even after bending, deform, i.e., change from one shape to another under the influence of heat or force, and recover to the original shape.
The prior patent is CN113082466A, the bulletin day is 2021, month 07 and 09, the patent provides a guide wire, the guide wire comprises an inner core, a spring jacket and an end cap, the inner core is arranged in the spring jacket in a penetrating way, the proximal end of the spring jacket is fixedly connected with the inner core, the distal end of the spring jacket is fixedly connected with the end cap, and the distal end of the inner core is fixedly connected with the end cap; the outer peripheral surface of the spring jacket is provided with blades which are spirally distributed around the axis of the spring jacket. When the guide wire advances to the lesion site and directly applies thrust to the guide wire to enable the guide wire to pass through the lesion site to be blocked, at the moment, the guide wire can be rotated, namely, the inner core is rotated to drive the spring sleeve to rotate, and the spring sleeve drives the blade to rotate when rotating.
The defect comprising the patent is that the vascular structure is complicated in tortuosity, the bifurcation is more, the bending angle cannot be automatically adjusted at the end of the wire guide in the prior art, multiple attempts are needed in the process that the wire guide enters the appointed part of the blood vessel, the damage to the blood vessel wall is easy to cause surgical accidents, the current common mode is that a doctor moulds the end of the wire guide into a certain angle according to the needs before re-using, but the vascular structure is complicated, the expected effect is often not achieved after moulding, and one angle is not suitable for bending of different blood vessel parts, and the operation needs a long time.
Disclosure of Invention
The object of the present application is to provide a device for solving the above-mentioned drawbacks of the prior art.
In order to achieve the above object, the present application provides the following technical solutions:
the steerable guide wire comprises a guide wire body, an operation part is arranged on the proximal end of the guide wire body, a deformation part and a shape memory alloy are arranged at the distal end of the guide wire body, the shape memory alloy has a first state and a second state at different temperatures, and the shape memory alloy enables the directions of the deformation parts to be different in the first state and the second state.
The controllable guide wire is made of nitinol.
The controllable guide wire is characterized in that a sheath is arranged on the guide wire main body, a first elastic piece is arranged on the sheath, and the first elastic piece is connected with the deformation portion.
The controllable guide wire is characterized in that the first elastic piece is a developing spring, and the developing spring is made of platinum tungsten alloy or platinum nickel alloy.
The controllable guide wire is characterized in that a driving assembly is arranged at the far end of the guide wire main body, the driving assembly comprises a first limiting ring and a sliding block, the first limiting ring is fixedly connected to the sheath, the sliding block is fixedly arranged on the guide wire main body, one end of the shape memory alloy is connected with the first limiting ring, and the other end of the shape memory alloy is connected with the sliding block.
The controllable guide wire is characterized in that a second elastic piece is arranged on the sliding block, a second limiting ring is arranged on the second elastic piece, and the second limiting ring is fixedly connected to the sheath.
The controllable guide wire is characterized in that a first blocking ring and a second blocking ring are fixedly arranged on the guide wire main body, a first protruding portion and a second protruding portion are arranged on the sliding block, the second protruding portion extrudes the first blocking ring on the moving stroke of the sliding block, and the first protruding portion extrudes the second protruding portion.
In the controllable guide wire, the second protruding portion is strip-shaped, and the end portion of the second protruding portion is provided with a wedge-shaped surface.
The controllable guide wire is characterized in that the sheath is provided with a limiting part, the limiting part comprises a long side and a short side, the short side is fixedly connected to the inner wall of the sheath, and the long side is attached to or parallel to the guide wire main body and faces the first protruding part.
The controllable guide wire is characterized in that the sliding block, the first blocking ring, the second blocking ring and the limiting part are made of the same materials.
In the technical scheme, after the guide wire main body enters a human body blood vessel, a doctor applies temperature to the shape memory alloy through the operation part, the states of the shape memory alloy are different at different temperatures, the shape memory alloy enables the directions of the deformation parts to be different, namely the angles of the distal ends of the guide wire main body are different, so that the bending degrees of different blood vessel parts are different, and the angles of the distal ends of the guide wire main body are changed by applying the temperature to the shape memory alloy to change the directions of the deformation parts.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments described in the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic view of a steerable guidewire according to an embodiment of the present application;
FIG. 2 is a schematic view showing a specific structure of a distal end of a guidewire body for steerable guidewires according to an embodiment of the present application;
FIG. 3 is a schematic view showing a specific structure of a distal end of a guidewire body of a steerable guidewire according to another embodiment of the application;
reference numerals illustrate:
1. an operation unit; 2. a guidewire body; 3. a sheath; 4. a first stop collar; 5. a shape memory alloy; 6. a slide block; 7. a second elastic member; 8. a second limiting ring; 9. a first elastic member; 10. a deformation section; 11. a first boss; 12. a second protruding portion; 13. a first blocker ring; 14. a second blocker ring; 15. and a limiting part.
Detailed Description
In order to make the technical scheme of the present application better understood by those skilled in the art, the present application will be further described in detail with reference to the accompanying drawings.
In the embodiments provided by the application, the proximal end and the distal end are the technical terms of the medical field, and aiming at various endoscopes and other catheters and guide wire medical instruments which need to enter a human body, the proximal end refers to the end which is close to a doctor, namely the end which is positioned outside the body, and the distal end refers to the end which is far away from the doctor, namely the end which enters the human body or the other end which is far away from the proximal end, and the embodiments of the application are in accordance with the standard.
Referring to fig. 1-3, an embodiment of the present application provides a steerable guidewire, comprising a guidewire body 2, an operating portion 1 being provided on a proximal end of the guidewire body 2, a deformation portion 10 being provided on a distal end of the guidewire body 2, and a shape memory alloy 5, the shape memory alloy 5 having a first state and a second state at different temperatures, the shape memory alloy 5 in the first state and the second state causing different orientations of the deformation portion 10.
Specifically, the distal end of the guide wire body 2 is penetrated into a human body vessel, the proximal end of the guide wire body 2 is positioned outside the human body for operation by a doctor, an operation part 1 is arranged on the proximal end of the guide wire body 2, preferably, the operation part 1 is an operation handle, the operation part 1 can control current to be input into the guide wire body 2, when the current is injected into the guide wire body 2, the temperature of the shape memory alloy 5 is changed by heating the guide wire body 2 through the Joule effect, the distal end of the guide wire body 2 is provided with a deformation part 10 and the shape memory alloy 5, preferably, the shape memory alloy 5 is made of nitinol, the activation temperature of the nitinol is about 40 ℃, the shape memory alloy 5 is a part or the most distal end of the guide wire body 2, the shape memory alloy 5 is arranged on the guide wire body 2, the shape memory alloy 5 can deform when the temperature changes, if bending towards one side, the deformation part 10 is driven to change in position or orientation, the shape memory alloy 5 has a first state and a second state at different temperatures, alternatively, the shape memory alloy 5 is arc-shaped, the bending degree of the shape memory alloy 5 in the first state is smaller than that of the shape memory alloy 5 in the second state, two ends of the shape memory alloy 5 are respectively connected with two parts of the guide wire main body 2, the part connected with the distal end is the deformation part 10, the shape memory alloy 5 can bend the deformation part 10 towards one side under the first state and the second state because the shape memory alloy 5 is limited on the deformation part 10, the shape memory alloy 5 drives the deformation part 10 to bend towards one side, namely, the bending angle of the distal end of the guide wire main body 2 is different, and then based on the newly formed bending angle, the physician operates at the proximal end to rotate the guidewire body 2 such that the bent deformation portion 10 is aligned and enters the corresponding blood vessel, and the operation portion 1 can further control the bending angle of the distal end of the guidewire body 2 by controlling the deformation amount of the shape memory alloy 5 through the magnitude of the input current.
After the guide wire main body 2 enters a human blood vessel, a doctor applies temperature to the shape memory alloy 5 through the operation part 1, the states of the shape memory alloy 5 are different at different temperatures, the shape memory alloy 5 enables the directions of the deformation parts 10 to be different, namely the angles of the distal ends of the guide wire main body 2 are different, the bending degrees of different blood vessel parts are different, and the directions of the deformation parts 10 are changed by applying the temperature to the shape memory alloy 5 so as to change the angles of the distal ends of the guide wire main body 2.
In another embodiment provided by the application, as shown in fig. 2, a driving component and a sheath 3 are arranged on the distal end of the guide wire main body 2, the sheath 3 is integrally sleeved on the guide wire main body 2, the proximal end of the sheath 3 is fixedly connected on the guide wire main body 2, the driving component comprises a first limiting ring 4 and a sliding block 6, the first limiting ring 4 is fixedly connected on the inner wall of the sheath 3, the radial dimension of the first limiting ring 4 is larger than that of the guide wire main body 2, that is, the guide wire main body 2 can move radially in the first limiting ring 4, preferably, the shape memory alloy 5 is a shape memory spring, when heated, one end of the shape memory alloy is connected with the first limiting ring 4, the other end of the shape memory alloy is connected with the sliding block 6, the sliding block 6 is arranged on the guide wire main body 2, preferably, the sliding block 6 is fixedly connected on the guide wire main body 2, that is, when the guide wire main body 2 moves towards the proximal end or the distal end, the sliding block 6 will move along the guide wire main body 2, the difference between the first state and the second state of the shape memory alloy 5, which are represented by the temperature change, is that the lengths of the shape memory alloy 5, that is, the elongations of the shape memory springs are different, the length of the shape memory alloy 5 in the first state is smaller than that of the shape memory alloy 5 in the second state, when the shape memory alloy 5 is in the first state due to the input of the current to the operation part 1, the shape memory alloy 5 elongates to press the sliding block 6, at this time, the sliding block 6 will drive the guide wire main body 2 to deform and move distally (the guide wire main body 2 has a certain elasticity so as to elongate slightly), and a first elastic element 9 is connected between the distal end of the deformation part 10 and the distal end of the sheath 3, the deformation part 10 of the guide wire main body 2 will be pulled by the first elastic element 9 when moving distally, the deformation portion 10 is caused to change in direction, i.e. to bend towards a certain side, and after bending, the deformation portion 10 can be changed in direction by the shape memory alloy 5 in the second state, i.e. the bending angle of the deformation portion is larger than that in the first state, when the temperature of the shape memory alloy 5 is reduced, the shape memory alloy 5 can move proximally at this time to drive the sliding block 6 to move proximally, so that the guide wire main body 2 can also move proximally, at this time, the guide wire main body 2 can be restored to the original state, preferably, the first elastic member 9 is a developing member such as a developing spring, and thus the bending direction of the deformation portion 10 can be known by observing the deformation direction of the first elastic member 9.
Further, a second elastic member 7 is provided on the slider 6, preferably, the second elastic member 7 is a spring, a second stop ring 8 is provided on the second elastic member 7, the second stop ring 8 is fixedly provided on the sheath 3, the radial dimension of the second stop ring 8 is larger than the radial dimension of the guide wire main body 2, that is, the guide wire main body 2 can radially move on the second stop ring 8, when the operation part 1 inputs current to enable the shape memory alloy 5 to be in a first state, the shape memory alloy 5 stretches and presses the slider 6, the slider 6 moves towards the distal end to drive the guide wire main body 2 to move towards the distal end, at this time, the distal end of the guide wire main body 2 moves towards the same side by being pulled by the first elastic member 9 to bend towards the same side, so that the shape memory alloy 5 in the second state also enables the direction of the deformation part 10 to change, that is the bending angle of the second stop ring 8 is larger than that of the guide wire main body 2, so that the second elastic member 7 and the second stop ring 8 are provided have an elastic force after being pressed, the second elastic member 7 has an auxiliary elastic force to restore the shape memory alloy 5 to the original shape memory alloy 6.
In a further embodiment provided by the present application, as shown in fig. 3, unlike the above embodiment, the sliding block 6 is slidingly connected to the guide wire body 2 instead of being fixedly connected, and meanwhile, the guide wire body 2 is fixedly provided with a first blocking ring 13 and a second blocking ring 14, the first blocking ring 13 and the second blocking ring 14 are fixedly arranged on the guide wire body 2, the radial length of the first blocking ring 13 is smaller than the radial length of the second blocking ring 14, the shape memory spring, the sliding block, and the first blocking ring 13 and the second blocking ring 14 are sequentially arranged on the guide wire body 2 from the proximal end to the distal end, that is, the first blocking ring 13 is closer to the shape memory alloy 5, in this embodiment, the sliding block 6 is slidingly arranged on the guide wire body 2, that is, when the shape memory alloy 5 pushes the sliding block 6, the sliding block 6 slides on the guide wire main body 2 and can not drive the guide wire main body 2 to move distally, the sliding block 6 is relatively provided with a first protruding part 11 and a second protruding part 12, the first protruding part 11 is strip-shaped, the second protruding part 12 is strip-shaped, the end part is provided with a wedge-shaped surface, for example, the cuboid end part is provided with an inclined surface, the axial length of the first protruding part 11 is longer than that of the second protruding part 12, the sheath 3 is fixedly provided with a limiting part 15, the limiting part 15 is positioned between the first protruding part 11 and the second protruding part 12, the limiting part 15 is L-shaped, the short side is fixedly connected to the inner wall of the sheath 3, the long side is attached to or parallel to the guide wire main body 2 and faces the first protruding part 11, the shape memory alloy 5 is in a deformed state when the shape memory alloy 5 is in a first state and a second state, that is, the difference in the elongation of the shape memory spring, which presses the slider 6 to move distally, causes the slider 6 to have three movement strokes, in which the second protrusion 12 on the slider 6 presses the first stopper ring 13 to move distally, when the first protrusion 11 is not yet abutted against the second stopper ring 14, the distal end of the wire body 2 moves distally, when the wire body 2 is pressed laterally by one of the second protrusions 12 against the first stopper ring 13, which is biased with a large probability in a direction away from the direction of the force, as in fig. 3, in which the deformation portion 10 of the wire body 2 is bent in a direction toward the first protrusion 11, so that the direction of the deflection can be controlled with a large probability, and then the shape memory spring continues to stretch into the second stroke, continuing to stretch so that the first stopper ring 13 abuts against the long side of the upper stopper 15, while the first boss 11 is not abutted against the second blocking ring 14 but has a small gap, at this time, since the first blocking ring 13 is limited and cannot continue to move, and the second boss 12 is strip-shaped and has a wedge-shaped surface at the end, when the second boss 12 presses the first blocking ring 13, the wedge-shaped surface abuts against the first blocking ring 13, at this time, the slider 6 continues to move distally while the inclined surface of the second boss 12 moves toward the lower side of the first blocking ring 13 (toward the sheath 3), so that the second boss 12 breaks away from the blocking of the first blocking ring 13 to allow the slider 6 to continue to move distally into the inner side of the long side of the limiting part 15, at this time, the first blocking ring 13 is pressed to move slightly upward (i.e., toward the first boss 11), and finally enters the third stroke, the slider 6 continues to move distally, the first protrusion 11 abuts against the second blocking ring 14, and at this time, the guide wire body 2 is subjected to a lateral pressing force of the first protrusion 11 against the second blocking ring 14, and at the same time, the first blocking ring 13 gives a downward biasing force, which is biased with a high probability in a direction away from the direction of the force, such as in fig. 3, the deformation 10 of the guide wire body 2 is bent in a direction towards the second protrusion 12, so that the deflection direction of the deformation 10 of the guide wire body is controlled, and the first blocking ring 13 of the guide wire body 2 is pressed by the second protrusion 12 on the slider 6 and the second blocking ring 14 of the guide wire body 2 are pressed by the first protrusion 11 on the slider 6, so that the deformation 10 of the guide wire body 2 is changed in direction and is directed in two different directions, which is more suitable for being used in a bent vascular structure, and the time and possible fracture problems caused by the removal of the rotation of the guide wire body 2 are avoided.
In this embodiment, it should be noted that, in the prior art, the temperature of the shape memory spring is different, which is not described in detail, and in addition, because the stress is smaller, it is difficult to accurately control, the technical effect described above may not be achieved each time, but the above may still be controlled by rotating the guide wire body 2, and finally, in order to increase the probability of deformation, a groove may be further disposed at a corresponding position on the deformation portion to reduce the stress of the portion, and to increase the probability of deflecting towards the groove side, for example, a groove is disposed towards each of the directions of the first protrusion 11 and the second protrusion.
While certain exemplary embodiments of the present application have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the application. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the application, which is defined by the appended claims.
Claims (7)
1. A steerable guidewire comprising a guidewire body, wherein an operating portion is provided on a proximal end of the guidewire body, a deformation portion is provided on a distal end of the guidewire body, and a shape memory alloy having a first state and a second state at different temperatures, the shape memory alloy causing the deformation portion to be oriented differently in the first state and the second state;
the guide wire body is provided with a sheath, the sheath is provided with a first elastic piece, and the first elastic piece is connected with the deformation part;
the driving assembly comprises a first limiting ring and a sliding block, wherein the first limiting ring is fixedly connected to the sheath, the sliding block is fixedly arranged on the guide wire main body, one end of the shape memory alloy is connected with the first limiting ring, and the other end of the shape memory alloy is connected with the sliding block;
the sliding block is provided with a second elastic piece, the second elastic piece is provided with a second limiting ring, and the second limiting ring is fixedly connected to the sheath.
2. The steerable guidewire of claim 1, wherein the shape memory alloy is nitinol.
3. The steerable guidewire of claim 1, wherein the first elastic member is a developing spring, and the developing spring is made of platinum-tungsten alloy or platinum-nickel alloy.
4. The steerable guidewire of claim 1, wherein the slider slides rather than being fixedly disposed on the guidewire body, a first stop ring and a second stop ring being fixedly disposed on the guidewire body, a first boss and a second boss being disposed on the slider, the second boss pressing against the first stop ring and the first boss pressing against the second boss on a travel of the slider.
5. The steerable guidewire of claim 4, wherein the second boss is strip-shaped and has a wedge-shaped face at an end.
6. The steerable guidewire of claim 4, wherein the sheath is provided with a stop portion, the stop portion comprising a long side and a short side, the short side being fixedly attached to the inner wall of the sheath, the long side being attached to or parallel to the guidewire body and facing the first boss.
7. The steerable guidewire of claim 6, wherein the slider, the first stop ring, the second stop ring, and the stop portion are the same material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310668769.XA CN116637275B (en) | 2023-06-07 | 2023-06-07 | Controllable guide wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310668769.XA CN116637275B (en) | 2023-06-07 | 2023-06-07 | Controllable guide wire |
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| Publication Number | Publication Date |
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| CN116637275A CN116637275A (en) | 2023-08-25 |
| CN116637275B true CN116637275B (en) | 2023-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310668769.XA Active CN116637275B (en) | 2023-06-07 | 2023-06-07 | Controllable guide wire |
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| CN (1) | CN116637275B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4944727A (en) * | 1986-06-05 | 1990-07-31 | Catheter Research, Inc. | Variable shape guide apparatus |
| US5055101A (en) * | 1983-10-31 | 1991-10-08 | Catheter Research, Inc. | Variable shape guide apparatus |
| US5143085A (en) * | 1987-05-13 | 1992-09-01 | Wilson Bruce C | Steerable memory alloy guide wires |
| US5916178A (en) * | 1995-03-30 | 1999-06-29 | Medtronic, Inc. | Steerable high support guidewire with thin wall nitinol tube |
| EP3093037A1 (en) * | 2015-05-13 | 2016-11-16 | Otto-von-Guericke-Universität Magdeburg | Guidewire |
| CN109847173A (en) * | 2017-11-30 | 2019-06-07 | 杭州唯强医疗科技有限公司 | Adjustable guide wire device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6533752B1 (en) * | 2000-01-05 | 2003-03-18 | Thomas C Waram | Variable shape guide apparatus |
| US10149965B2 (en) * | 2013-07-11 | 2018-12-11 | Cook Medical Technologies Llc | Shape memory guide wire |
-
2023
- 2023-06-07 CN CN202310668769.XA patent/CN116637275B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5055101A (en) * | 1983-10-31 | 1991-10-08 | Catheter Research, Inc. | Variable shape guide apparatus |
| US4944727A (en) * | 1986-06-05 | 1990-07-31 | Catheter Research, Inc. | Variable shape guide apparatus |
| US5143085A (en) * | 1987-05-13 | 1992-09-01 | Wilson Bruce C | Steerable memory alloy guide wires |
| US5916178A (en) * | 1995-03-30 | 1999-06-29 | Medtronic, Inc. | Steerable high support guidewire with thin wall nitinol tube |
| EP3093037A1 (en) * | 2015-05-13 | 2016-11-16 | Otto-von-Guericke-Universität Magdeburg | Guidewire |
| CN109847173A (en) * | 2017-11-30 | 2019-06-07 | 杭州唯强医疗科技有限公司 | Adjustable guide wire device |
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| Publication number | Publication date |
|---|---|
| CN116637275A (en) | 2023-08-25 |
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