CN113893443A

CN113893443A - Micro guide wire with nickel-titanium hose

Info

Publication number: CN113893443A
Application number: CN202111239658.4A
Authority: CN
Inventors: 付学森; 蒲良松; 孙丽娜; 钟午健
Original assignee: Shenzhen Maipuqi Medical Technology Co ltd
Current assignee: Shenzhen Maipuqi Medical Technology Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-01-07

Abstract

The invention relates to the technical field of medical instruments and discloses a micro guide wire with a nickel-titanium hose.A hose body is inserted into a blood vessel, the head end of the hose enters the blood vessel, the hose is durable and cannot be easily deformed in complex neurovascular intervention, the damage to the blood vessel and the failure of an operation caused by the change of the apparatus in the operation are avoided to a great extent, the phenomenon that the outer layer at the far end of a core wire is generally only provided with a single wire winding, the flexibility and the durability are poor, the hose is durable and can be easily deformed in the complex neurovascular intervention is avoided, and the success rate of the operation is improved; according to the invention, the pushing pipe is pushed to slide at the right end of the core wire body rod body, and the pushing pipe drives the sliding block to slide on the surface of the connecting rod, so that the sliding block extrudes the net-shaped woven sphere to bulge, the outer part of the sliding block is tightly attached to the inner part of the blood vessel, the blood vessel tortuosity and stenosis, such as intracranial blood vessels, when a micro-guide wire is sent to the far end of the blood vessel, are avoided, complications are easily caused, and the operation effect is improved.

Description

Micro guide wire with nickel-titanium hose

Technical Field

The invention relates to the technical field of medical instruments, in particular to a micro guide wire with a nickel-titanium hose.

Background

A guide wire (GuideWire), also known as a guide wire or guide wire, is one of the primary tools for percutaneous cannulas. The guide wire plays a role in guiding and supporting the catheter, helps the catheter to enter blood vessels and other cavities, and guides the catheter to smoothly reach a lesion. The minimally invasive intravascular interventional therapy technology has the same important function as a catheter in catheter treatment operation, is gradually popularized in China as a new medical development in recent years, and the process is that interventional medical instruments are selectively delivered to a plurality of important organs and parts of a human body, such as heart, liver, brain, kidney, digestive system and reproductive system, through naturally existing vascular channels under the guidance of medical imaging equipment, so that the important technology and method for diagnosis and treatment have the advantages of no need of surgical operation, small wound and relatively low medical treatment cost. The guide wire plays a role in guiding the catheter to a target position and opening an occluded lumen in the interventional operation.

The "(a medical micro-guide wire for interventional therapy)" disclosed in the invention patent (CN 201921249636.4) has the advantages that the outer layer at the distal end of the core wire is generally only provided with a single winding wire, the flexibility and durability are poor, the core wire is durable and can be easily deformed in complex neurovascular intervention, the vascular injury and the operation failure are caused to a large extent due to the fact that the instruments are deformed in the operation, and meanwhile, the micro-guide wire is difficult to be operated when being sent to the distal end of the blood vessel, such as intracranial blood vessels, and the complications are easily caused. If the insertion position is too close, displacement is easy to occur, normal operation is affected, and potential safety hazards exist, so that the problem is solved by providing the micro guide wire with the nickel-titanium hose, the flexibility and the durability of a soft section can be improved, the micro guide wire is durable and cannot be easily deformed in complex neurovascular intervention, and the micro guide wire can extend into a blood vessel to provide supporting force to prevent displacement.

Disclosure of Invention

The invention aims to provide a micro guide wire with a nickel-titanium hose, which has the advantages of improving the flexibility and the durability of a soft section, being durable and not easy to deform in complex neurovascular intervention and providing a supporting force for extending into a blood vessel to prevent displacement, and solves the problems that the outer layer at the far end of a core wire is generally only provided with a single wire winding, the flexibility and the durability are poor, the outer layer is durable and easy to deform in complex neurovascular intervention, and the vascular injury and the operation failure are caused to a great extent due to the fact that instruments are deformed in the operation, and meanwhile, the blood vessel is tortuous and narrow, such as intracranial blood vessels, the operation of the micro guide wire is difficult when the micro guide wire is sent to the far end of the blood vessel, and complications are easily caused. If the stretching position is too close, the displacement is easy to occur, the normal operation is influenced, and the problem of potential safety hazard exists.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a little seal wire with nickel titanium hose, includes core silk body pole body, the wire winding body is installed on the right side on core silk body pole body surface, the surface mounting of wire winding body has the hose body, the right-hand member bolt of core silk body pole body has the connecting rod, the sliding surface of connecting rod is connected with netted spheroid of weaving, the hose head end is installed to the right-hand member of connecting rod, netted spheroidal left side of weaving is installed the sliding block, and the inside of sliding block and the sliding surface of connecting rod are connected, the left side of sliding block is installed and is pushed away the pipe, and pushes away the left end that pushes away the pipe and run through the right-hand member of core silk body pole body and extend.

Preferably, the hose head end adopts "U" font design, and has scribbled the skin-friendly coating in the hose head end, through the circular arc transition, has promoted the trafficability characteristic of operation in the art in complicated nerve is intervened, reduces patient's misery, promotes operation efficiency, has good biocompatible functional coating. In a dry state, the coating thickness is within 5 microns, the coating has good toughness, is uniformly adhered to the surface of the medical instrument, is colorless and transparent, and is not easy to observe by naked eyes; in a wet state, the coating is activated by water to form a colorless and transparent hydrogel, and the hydrogel coating is highly lubricating and can bear repeated friction and has wide application in the medical field. The coating is formed by organically combining macromolecules which accord with biological evaluation to the surface of a catheter product in a modification mode through a special mode, and has functional performance, and is named due to good hydrophilic performance.

Preferably, the surface coating of core silk body pole body has the PTE coating, and the core silk distal end is the gradual change section, and waterborne medical high molecular polymer has and reduces friction with the vascular wall, lubricated effect more.

Preferably, the wire winding body is made of platinum-nickel alloy, so that good developing performance is improved, and the platinum is used as a base and added with nickel to form platinum alloy. The composite material is a continuous solid solution at high temperature, and two superstructure ordered phases NiPt and Ni3Pt are formed at lower temperature. Respectively having AuCu and Cu3Au type structures. In platinum-rich alloys, as the nickel content increases, the density of the alloy decreases, the room temperature mechanical properties and resistivity increase, and the elongation and temperature coefficient of resistance decrease. When heated under oxidizing conditions, the platinum-nickel alloy undergoes selective preferential oxidation of nickel to produce Nil). Thus, as the nickel content increases, the oxidation and corrosion resistance of the platinum-nickel alloy decreases, and the high temperature proof strength and creep life of the alloy decrease. The nickel-rich alloy has ferromagnetism, and the Curie temperature is gradually reduced along with the increase of the platinum content; the platinum-rich alloy is paramagnetic.

Preferably, the hose body is made of a nylon-titanium alloy material, so that the flexibility and the durability of the soft section can be improved, vascular injury and operation failure caused by the fact that instruments are deformed in the operation are avoided to a great extent, and the titanium alloy refers to various alloy metals made of titanium and other metals. Titanium is an important structural metal developed in the 50 s of the 20 th century, and titanium alloy has high strength, good corrosion resistance and high heat resistance. In the 50-60 s of the 20 th century, high-temperature titanium alloy for aircraft engines and structural titanium alloy for engine bodies were mainly developed.

Preferably, the surface of the reticular braided sphere is provided with hollow holes, so that the reticular braided sphere is durable and cannot be easily deformed in a complex neurovascular intervention.

Preferably, the surface of the hose head end is provided with a developing block for better observation.

Preferably, the core shaft body and the push tube are made of 304 stainless steel, which is a material commonly used in stainless steel, having a density of 7.93 g/cm for casting, also known as 18/8 stainless steel, so as to be durable and corrosion resistant, non-magnetic, and unable to change its metallographic structure by a heat treatment method. The high temperature resistant 800 ℃, has the characteristics of good processing performance and high toughness, and is widely used in industry, furniture decoration industry and food medical industry.

Preferably, the diameter of the expanded reticular braided sphere is 2-10 mm, the diameter can be adjusted according to different inner diameters of blood vessels, the application range of the reticular braided sphere is enlarged, and the applicability is higher.

Preferably, the reticular braided sphere is a nickel-titanium alloy wire reticular braided sphere which is restrained by the vessel wall to be in an oval or other irregular geometric shapes, and the wall grabbing performance is good.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the hose body is inserted into a blood vessel, the head end of the hose enters the blood vessel, the hose is durable in a complex neurovascular intervention and cannot be easily deformed, the vascular injury and operation failure caused by the deformation of instruments in the operation are avoided to a great extent, the outer layer of the far end of the core wire is prevented from being generally provided with a single winding wire, the flexibility and durability are poor, the hose is durable in the complex neurovascular intervention and can be easily deformed, and the success rate of the operation is improved;

2. according to the invention, the pushing pipe is pushed to slide at the right end of the core wire body rod body, and the pushing pipe drives the sliding block to slide on the surface of the connecting rod, so that the sliding block extrudes the net-shaped woven sphere to bulge, the outer part of the sliding block is tightly attached to the inner part of the blood vessel, the blood vessel tortuosity and stenosis, such as intracranial blood vessels, when a micro-guide wire is sent to the far end of the blood vessel, are avoided, complications are easily caused, and the operation effect is improved.

Drawings

FIG. 1 is a front view of a partial structure of the present invention;

FIG. 2 is an enlarged view of a portion of the structure of FIG. 1;

fig. 3 is a schematic front view of the patent structure of the present invention.

In the figure: 1. a core wire body rod body; 2. a filament winding body; 3. a hose body; 4. a connecting rod; 5. weaving a spherical body in a net shape; 6. a hose head end; 7. a slider; 8. pushing the pipe; 9. hollowing out holes; 10. and a developing block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1-3, a micro guide wire with a nickel-titanium hose includes a core wire body rod body 1, a wire winding body 2 is installed on the right side of the surface of the core wire body rod body 1, a hose body 3 is installed on the surface of the wire winding body 2, and a connecting rod 4 is bolted to the right end of the core wire body rod body 1. The hose head end 6 adopts a U-shaped design, the hose head end 6 is coated with a skin-friendly coating, through arc transition, the passing performance of the operation in the operation is improved in the complicated nerve insertion, the pain of a patient is reduced, the operation efficiency is improved, the surface of the core wire body rod body 1 is coated with a PTE coating, the far end of the core wire is a gradual change section, the water-based medical high polymer has the effects of reducing friction with the vascular wall and being more lubricated, the wire winding body 2 adopts a platinum-nickel alloy material, so that the good developing performance is improved, the hose body 3 adopts a polyamide-titanium alloy material, the flexibility and the lasting performance of the soft section can be improved, the vascular injury and the operation failure caused by the deformation of instruments in the operation are avoided to a great extent, the hose head end 6 enters the blood vessel by inserting the hose body 3 into the blood vessel, and the hose head end 6 is more durable and cannot be easily deformed in the complicated nerve-blood vessel insertion, the vascular injury and the operation failure caused by the deformation of the instrument in the operation are avoided to a great extent, the outer layer at the far end of the core wire is generally only provided with a single winding wire, the softness and the durability are poor, the core wire is more durable and can be easily deformed in the complex neurovascular intervention, and the success rate of the operation is improved.

Example 2

Referring to fig. 1-3, a micro guide wire with a nickel-titanium hose includes a core wire body rod body 1, a wire winding body 2 is installed on the right side of the surface of the core wire body rod body 1, a hose body 3 is installed on the surface of the wire winding body 2, and a connecting rod 4 is bolted to the right end of the core wire body rod body 1. The flexible tube head end 6 adopts a U-shaped design, the flexible tube head end 6 is coated with a skin-friendly coating, the passing performance of the operation in the operation is improved in the complicated nerve insertion through arc transition, the pain of a patient is reduced, the operation efficiency is improved, the surface of the core wire body rod body 1 is coated with a PTE coating, the far end of the core wire is a gradual change section, the water-based medical high polymer has the effects of reducing friction with the vascular wall and being more lubricated, the wire winding body 2 is made of platinum-nickel alloy, so that the good developing performance is improved, the flexible tube body 3 is made of polyamide-titanium alloy, the flexibility and the durability of the soft section can be improved, the vascular injury and the operation failure caused by the deformation of the instrument in the operation are avoided to a great extent, the surface of the connecting rod 4 is slidably connected with the reticular sphere 5, and the flexible tube can be released no matter what direction is used for placement and uniform spherical shape after being unfolded without positioning intentionally, the operation is convenient, the success rate of the operation is improved, the operation cost is reduced, the hose head end 6 is installed at the right end of the connecting rod 4, the friction between the hose head end 6 and the vascular wall is reduced, the sliding block 7 is installed at the left side of the net-shaped woven ball 5, the inner part of the sliding block 7 is in sliding connection with the surface of the connecting rod 4, the pushing pipe 8 is installed at the left side of the sliding block 7, the pushing pipe 8 is pushed to drive the sliding block 7 to slide on the surface of the connecting rod 4, the net-shaped woven ball 5 is extruded to bulge and is in an incomplete release state in the blood vessel, the left end of the pushing pipe 8 penetrates through the right end of the core wire body 1 and extends, hollow holes 9 are formed in the surface of the net-shaped woven ball 5, the mesh shape can be a regular polygon or an irregular polygon, the polygon is uniformly arranged and can also be non-uniformly arranged, the developing block 10 is installed on the surface of the hose head end 6, and plays a better observation role, the core wire body rod body 1 and the pushing pipe 8 are made of medical 304 stainless steel materials, so that the core wire body rod body is more durable and corrosion-resistant, is non-magnetic, and can not change the metallographic structure of the stainless steel by a heat treatment method, the diameter of the expanded reticular braided sphere 5 is 2-10 mm, the reticular braided sphere 5 is adjusted according to different inner diameters of blood vessels, the reticular braided sphere 5 is specifically a nickel-titanium alloy wire reticular braided sphere 5, is restrained by the vessel wall to be in an oval or other irregular geometric shape, has good wall grasping performance, and is pushed to push the pushing pipe 8 to slide at the right end of the core wire body rod body 1, the pushing pipe 8 drives the sliding block 7 to slide on the surface of the connecting rod 4, so that the sliding block 7 extrudes the reticular braided sphere 5 to bulge, the outer part of the sliding block is tightly attached to the inside of the blood vessel, and the tortuous and narrow blood vessel such as intracranial blood vessels, the operation difficulty of micro-delivery to the far end of the blood vessel is easy to cause complications, the operation effect is improved.

The working principle is as follows: the hose body 3 is inserted into a blood vessel, the head end 6 of the hose enters the blood vessel, the hose is durable and cannot be easily deformed in complex neurovascular intervention, and the damage to the blood vessel and the failure of an operation caused by the fact that an instrument is shadowed in the operation are avoided to a great extent;

the pipe 8 is pressed in the promotion, and the pipe 8 is pressed in the promotion slides at the right-hand member of core silk body pole body 1, and the pipe 8 is pressed in the promotion drives sliding block 7 and slides on the surface of connecting rod 4 for sliding block 7 extrusion net shape is woven spheroid 5 and is heaved, and its outside pastes tight blood vessel inside.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a little seal wire with nickel titanium hose, includes core silk body pole body (1), its characterized in that: wire winding body (2) are installed on the right side on core silk body pole body (1) surface, the surface mounting of wire winding body (2) has hose body (3), the right-hand member bolt of core silk body pole body (1) has connecting rod (4), the sliding surface connection of connecting rod (4) has netted spheroid (5) of weaving, hose head end (6) are installed to the right-hand member of connecting rod (4), slide block (7) are installed in the left side of netted spheroid (5) of weaving, and the inside of slide block (7) and the sliding surface connection of connecting rod (4), the left side of slide block (7) is installed and is pushed pipe (8), and the left end that pushes pipe (8) runs through the right-hand member of core silk body pole body (1) and extends.

2. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the hose head end (6) adopts a U-shaped design, and the hose head end (6) is coated with a skin-friendly coating.

3. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the surface of the core wire body rod body (1) is coated with a PTE coating, and the far end of the core wire is a transition section.

4. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the wire winding body (2) is made of platinum-nickel alloy.

5. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the hose body (3) is made of a nylon-titanium alloy material.

6. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the surface of the reticular braided sphere (5) is provided with hollow holes (9).

7. The micro guidewire with a nickel titanium hose according to claim 1, wherein: and a developing block (10) is arranged on the surface of the hose head end (6).

8. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the core wire body rod body (1) and the pushing pipe (8) are made of medical 304 stainless steel.

9. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the diameter of the expanded reticular braided sphere (5) is 2-10 mm.

10. The micro guidewire with a nickel titanium hose according to claim 1, wherein: the reticular braided sphere (5) is specifically a nickel-titanium alloy wire reticular braided sphere (5).