CN212347423U - Guidewire with high recoverability - Google Patents
Guidewire with high recoverability Download PDFInfo
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- CN212347423U CN212347423U CN202021448830.8U CN202021448830U CN212347423U CN 212347423 U CN212347423 U CN 212347423U CN 202021448830 U CN202021448830 U CN 202021448830U CN 212347423 U CN212347423 U CN 212347423U
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- high recoverability
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Abstract
The utility model discloses a seal wire with high recoverability belongs to medical instrument technical field, produces plastic deformation scheduling problem design easily after solving current seal wire repetitious usage. The utility model discloses seal wire with high recoverability includes: the integrally formed core wire comprises a proximal part and a distal grinding part, wherein the front end of the proximal part is in a conical shape with gradually reduced diameter, and the diameter of the distal grinding part is less than or equal to that of the proximal part; the two ends of the resilient piece are respectively attached to the outer peripheral surfaces of the proximal end part and the distal end grinding part; and the elastic piece is sleeved on the peripheries of the proximal end part, the distal end grinding part and the rebound piece. The utility model discloses but seal wire with high resilience can assist the quick reconversion of core silk after the seal wire is buckled, guarantees that obvious plastic deformation can not appear at the in-process of repetitious usage in the core silk, and the seal wire can repetitious usage, and shape retention ability and durability can be strong, and application scope is wide.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially, relate to a seal wire with high recoverability.
Background
The guide wire is an indispensable instrument in interventional operation and plays a role in guiding other instruments in the early stage of operation. Due to the complexity of the human blood vessels and the different states of the lesion site, there is a high demand for shape retention and durability of the guidewire during use. When the guide wire adopts a stainless steel wire with low elasticity as a core wire, plastic deformation is easy to generate, so that the guide wire cannot recover the initial form after being used, and the requirement of multiple use of the guide wire cannot be met.
In order to improve the requirement of the compliance of the guide wire, the conventional composite guide wire comprises a guide wire soft head at the front end and a guide wire hard head connected with the guide wire soft head, wherein the guide wire soft head is made of a material with strong elastic deformation capability and can be recovered to the original shape after being used for many times. The composite guide wire has the following defects: the connection structure between the soft guide wire head and the hard guide wire head is too simple, and the connection part is easy to break after being used for many times, so that the subsequent use of the guide wire is influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a seal wire with high recoverability, resilience piece can help the core silk reconversion fast.
To achieve the purpose, the utility model adopts the following technical proposal:
a guidewire having high recoverability, comprising: the core wire is integrally formed and comprises a proximal part and a distal grinding part, the front end of the proximal part is in a conical shape with the diameter gradually reduced, and the diameter of the distal grinding part is less than or equal to that of the proximal part; a resilient member having both ends respectively attached to the outer peripheral surfaces of the proximal end portion and the distal end grinding portion; and the elastic piece is sleeved on the peripheries of the proximal end part, the distal end grinding part and the resilient piece.
In particular, the resilient member is a sleeve made of a soft medical polymer material, and the junction of the proximal portion and the distal grinding portion is located in the sleeve.
Particularly, the soft medical high polymer material is TPU, silica gel, Pebax or rubber.
In particular, the peripheral wall of the sleeve is conical or cylindrical.
In particular, the sleeve has a length of 10mm to 600mm and an outer diameter in the range of 0.1mm to 0.5 mm.
Particularly, the elastic piece is at least one section of strip-shaped body made of nickel-titanium alloy or cobalt-chromium alloy, and the strip-shaped body is of a straight strip-shaped structure or a spiral structure; the two ends of the strip-shaped body are respectively welded on the outer peripheral surfaces of the proximal end part and the distal end grinding part.
In particular, the resilient member is a cylindrical spring, and the axes of the proximal and distal grinding portions are coincident with the axis of the spring.
In particular, the elastic element is composed of two sections, one section near the head of the guide wire is made of platinum or gold, and the other section far away from the head of the guide wire is made of stainless steel.
In particular, the guide wire further comprises a hemispherical end part, and the bottom surface of the end part is bonded or welded with the elastic part.
Particularly, the rebound piece comprises a sleeve made of a soft medical polymer material and a strip-shaped body made of nickel-titanium alloy or cobalt-chromium alloy, wherein the strip-shaped body is of a straight strip-shaped structure or a spiral structure; the two ends of the strip-shaped body are respectively welded on the outer peripheral surfaces of the proximal end portion and the distal end grinding portion, and the sleeve is sleeved on the peripheries of the proximal end portion, the distal end grinding portion and the strip-shaped body.
In particular, the core wire is made of stainless steel, nickel titanium alloy or cobalt chromium alloy.
The utility model discloses be provided with the rebound spare on the core silk outer peripheral face of seal wire with high recoverability, the setting of rebound spare is in the juncture of the proximal part that takes place to buckle and distal end grinding part moreover, and the rebound spare can assist the quick reconversion of core silk after the seal wire is buckled, guarantees that obvious plastic deformation can not appear at the in-process of repetitious usage in the core silk, and the seal wire can used repeatedly many times, and shape retention ability and durability can be strong, and application scope is wide.
Drawings
Fig. 1 is a schematic view of a first structure of a guide wire according to an embodiment of the present invention;
fig. 2 is a schematic view of a second structure of a guide wire according to an embodiment of the present invention;
fig. 3 is a schematic view of a third structure of the guide wire according to the embodiment of the present invention.
In the figure:
1. a proximal portion; 2. a distal grinding section; 3. an elastic member; 4. a sleeve; 5. a strip-shaped body; 6. and an end portion.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.
The present embodiment discloses a guide wire with high recoverability, as shown in fig. 1 to 3, which comprises a core wire, which may be made of, but not limited to, stainless steel, nitinol or cobalt-chromium alloy, a resilient member, and an elastic member 3. The integrally formed core wire comprises a proximal portion 1 and a distal grinding portion 2, wherein the front end (the end close to the distal grinding portion 2) of the proximal portion 1 is in a conical shape with the diameter gradually reduced towards the distal grinding portion 2, and the diameter of the distal grinding portion 2 is less than or equal to that of the proximal portion 1; because of the change of the diameter, the bending usually occurs at the junction of the proximal portion 1 and the distal grinding portion 2, two ends of a rebound piece made of a material (such as a polymer material or a metal material) capable of being largely deformed are respectively attached to the outer peripheral surfaces of the proximal portion 1 and the distal grinding portion 2, and the rebound piece is utilized to assist the core wire to recover to the original shape as soon as possible after the deformation, so that certain rebound resilience is realized; the elastic member 3 with good deformability is sleeved on the peripheries of the proximal portion 1, the distal grinding portion 2 and the resilient member for developing and protecting the core wire.
The shape retention capacity and the durability of the core wire are improved by the guide wire through the rebound piece, other more expensive materials are not needed to be used for replacing grinding stainless steel, nickel-titanium alloy or cobalt-chromium alloy to serve as the core wire, the rebound piece can be installed on the basis of the existing product, the manufacturing cost is low, and the processing is simple and convenient; the rebound part is arranged at the junction of the proximal part 1 and the distal grinding part 2, and can well assist the core wire to restore the original shape when the blood vessel is bent, so that the core wire is prevented from being plastically deformed and can be repeatedly used.
The specific structure of the rebound piece is not limited, and the core wire can be assisted to restore to the original shape as soon as possible after deformation. Preferably, as shown in fig. 1, the resilient member may be a sleeve 4 made of soft medical polymer material, and the boundary between the proximal portion 1 and the distal grinding portion 2 is located in the sleeve 4. The soft medical polymer material can be, but is not limited to, TPU, silica gel, Pebax or rubber, and the materials have good flexibility and can be quickly restored after deformation.
The core silk wrapped up by sleeve 4 is the toper that the diameter reduces gradually, and is preferred, and the periphery wall of sleeve 4 is the toper, and processing is convenient, and the internal face of sleeve 4 is inseparabler with the laminating of the outer peripheral face of core silk, and the ability of supplementary core silk reconversion is stronger.
Of course, the outer peripheral wall of the sleeve 4 may be a straight cylindrical shape, i.e., the outer peripheral diameter of the sleeve 4 does not vary with the diameter of the core wire. The sleeve 4 of straight cylindric has increased the radial width of sleeve 4 under the condition of guaranteeing not to influence the elastic component 3 cover and establish, has improved resilience ability.
The specific dimensions of the sleeve 4 are not limited and depend on the gauge of the core wire and the requirements of use. Preferably, the length of the sleeve 4 is 10mm-600mm, the outer diameter is in the range of 0.1mm-0.5mm, and the application range is wide.
As shown in fig. 2, the resilient member may also be one or more strips 5 made of nitinol, cobalt-chromium alloy or other metal materials with high elasticity, and the strips 5 have a straight strip structure or a spiral structure; both ends of the bar 5 are welded to the outer peripheral surfaces of the proximal end portion 1 and the distal end grinding portion 2, respectively. When the resilient member is a strip-shaped body 5 with a multi-section straight strip-shaped structure, the strip-shaped bodies 5 are axisymmetrically welded on the peripheral surface of the core wire; when the rebound piece is a strip-shaped body 5 with a spiral structure, the spiral structure is sleeved on the periphery of the core wire, so that the rebound capability of the core wire is enhanced. Moreover, metal materials with high elasticity such as nickel-titanium alloy, cobalt-chromium alloy and the like have super elasticity, so that the resilience of the core wire is enhanced when the core wire is bent, and the overall durability of the guide wire is improved.
As shown in fig. 3, the resilient member may also include a sleeve 4 made of a soft medical polymer material and a strip 5 made of a nickel-titanium alloy or a cobalt-chromium alloy, wherein the strip 5 has a straight strip structure or a spiral structure; the two ends of the strip-shaped body 5 are respectively welded on the outer peripheries of the proximal end part 1 and the distal end grinding part 2, and the sleeve 4 is sleeved on the outer peripheries of the proximal end part 1, the distal end grinding part 2 and the strip-shaped body 5. The medical polymer material has resilience, the nickel-titanium alloy or the cobalt-chromium alloy has superelasticity, and when the core wire is bent, the resilience of the core wire can be enhanced by the medical polymer material, the nickel-titanium alloy or the cobalt-chromium alloy, so that the whole durability of the guide wire is higher.
When in processing, firstly, a medical polymer material (such as TPU) is made into a tubular structure, when the strip-shaped body 5 is in a straight strip-shaped structure, the tubular structure is sleeved at the outer side of the junction of the proximal part 1 and the distal grinding part 2, the strip-shaped body 5 made of nickel-titanium alloy and having the diameter of 0.01mm-0.1mm is plugged into the tubular structure, and the strip-shaped body 5 is attached to the peripheral surface of the core wire or welded on the peripheral surface of the core wire; sleeving a heat-shrinkable tube on the outer side of the tubular structure, and starting the heat-shrinkable tube to heat the tubular structure; after heating, removing the heat-shrinkable tube, and tightly hooping the tubular structure on the peripheral surface of the core wire; the elastic member 3 is fitted over the outer peripheries of the proximal portion 1, distal grinding portion 2 and resilient member.
When the strip-shaped body 5 is of a spiral structure, firstly, the strip-shaped body 5 is sleeved on the outer side of the junction of the proximal part 1 and the distal grinding part 2, then, the tubular structure is sleeved on the outer side of the strip-shaped body 5, and then, the tubular structure is heated by using the heat-shrinkable tube; after heating, the heat shrink tube is removed and the elastic member 3 is fitted over the proximal portion 1, distal grinding portion 2 and the outer periphery of the resilient member.
The elastic part 3 is preferably a cylindrical spring, the axes of the proximal part 1 and the distal grinding part 2 are coincident with the axis of the spring after installation, and the deformation angles after bending are consistent, so that the resilience of the rebound part is improved. The elastic part 3 is preferably composed of two sections of structures, and one section close to the head of the guide wire is a wire winding spring made of platinum or gold with developing effect and used for developing; a section far away from the head of the guide wire is made of stainless steel and used for installing and fixing the elastic part 3 and the proximal part 1, and the elastic part 3 can protect the proximal part 1 to a certain degree.
In addition to the above structure, the guide wire further includes a hemispherical end portion 6, and the bottom surface of the end portion 6 is bonded to the elastic member 3 by glue or soldered or the like. The bulbous end portion 6 is free of sharp faces or lines to avoid scratching the inner wall of the patient's blood vessel or other organs.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (11)
1. A guidewire having high recoverability, comprising:
the core wire comprises a proximal part (1) and a distal grinding part (2) which are integrally formed, wherein the front end of the proximal part (1) is in a conical shape with the diameter gradually reduced, and the diameter of the distal grinding part (2) is less than or equal to that of the proximal part (1);
the two ends of the elastic piece are respectively attached to the outer peripheral surfaces of the proximal end part (1) and the distal end grinding part (2); and the number of the first and second groups,
and the elastic piece (3) is sleeved on the peripheries of the proximal end part (1), the distal end grinding part (2) and the resilient piece.
2. The guide wire with high recoverability according to claim 1, wherein the resilient member is a sleeve (4) made of a soft medical polymer material, and the boundary between the proximal portion (1) and the distal abrasive portion (2) is located in the sleeve (4).
3. The guidewire with high recoverability according to claim 2, wherein the soft medical polymer material is TPU, silicone, Pebax, or rubber.
4. The guidewire with high recoverability according to claim 2, wherein the outer peripheral wall of the sleeve (4) has a tapered or straight cylindrical shape.
5. The guidewire with high recoverability according to claim 2, wherein the sleeve (4) has a length of 10mm to 600mm and an outer diameter in the range of 0.1mm to 0.5 mm.
6. The guidewire with high recoverability according to claim 1, wherein the resilient member is at least one segment of a strip-shaped body (5) made of nitinol or cocr, the strip-shaped body (5) having a straight strip-shaped structure or a spiral-shaped structure; and two ends of the strip-shaped body (5) are respectively welded on the peripheral surfaces of the proximal end part (1) and the distal end grinding part (2).
7. The guide wire with high recoverability according to claim 1, wherein the resilient member comprises a sleeve (4) made of a soft medical polymer material and a strip (5) made of a nickel-titanium alloy or a cobalt-chromium alloy, the strip (5) having a straight strip structure or a spiral structure; the two ends of the strip-shaped body (5) are respectively welded on the peripheral surfaces of the proximal end part (1) and the distal end grinding part (2), and the sleeve (4) is sleeved on the peripheries of the proximal end part (1), the distal end grinding part (2) and the strip-shaped body (5).
8. The guidewire with high recoverability according to any one of claims 1 to 7, wherein the elastic member (3) is a cylindrical spring, and the axes of the proximal portion (1) and the distal abrasive portion (2) are coincident with the axis of the spring.
9. The guide wire with high recoverability according to claim 8, wherein the elastic member (3) is composed of a two-stage structure, a stage near the guide wire head is made of platinum or gold, and a stage far from the guide wire head is made of stainless steel.
10. The guide wire with high recoverability according to any one of claims 1 to 7, further comprising a hemispherical end portion (6), wherein a bottom surface of the end portion (6) is bonded or welded to the elastic member (3).
11. The guidewire with high recoverability according to any one of claims 1 to 7, wherein the core wire is made of stainless steel, nitinol, or cobalt-chromium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021448830.8U CN212347423U (en) | 2020-07-21 | 2020-07-21 | Guidewire with high recoverability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021448830.8U CN212347423U (en) | 2020-07-21 | 2020-07-21 | Guidewire with high recoverability |
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| Publication Number | Publication Date |
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| CN212347423U true CN212347423U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021448830.8U Active CN212347423U (en) | 2020-07-21 | 2020-07-21 | Guidewire with high recoverability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760169A (en) * | 2020-07-21 | 2020-10-13 | 苏州茵络医疗器械有限公司 | Guidewire with high recoverability |
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2020
- 2020-07-21 CN CN202021448830.8U patent/CN212347423U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760169A (en) * | 2020-07-21 | 2020-10-13 | 苏州茵络医疗器械有限公司 | Guidewire with high recoverability |
| CN111760169B (en) * | 2020-07-21 | 2024-09-03 | 苏州茵络医疗器械有限公司 | Guide wire with high restorability |
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