CN215309535U

CN215309535U - Guide wire

Info

Publication number: CN215309535U
Application number: CN202120952033.1U
Authority: CN
Inventors: 王吉成; 孔令涛; 林彦廷; 张新波
Original assignee: Hemu China Biological Engineering Co ltd
Current assignee: Hemu China Biological Engineering Co ltd
Priority date: 2021-05-07
Filing date: 2021-05-07
Publication date: 2021-12-28
Anticipated expiration: 2031-05-07

Abstract

The utility model relates to the technical field of medical instruments, in particular to a guide wire which comprises an end head, a core wire and a sleeve, wherein the core wire comprises a core wire far end, a core wire gradient section and a core wire near end, the end head is arranged at the core wire far end at intervals, the other end of the core wire far end is fixedly connected with one end of the core wire gradient section, the other end of the core wire gradient section is fixedly connected with the core wire near end, one end of the sleeve is fixedly connected with the end head, the other end of the sleeve is fixedly connected with the core wire near end, the core wire far end is provided with a buffer section, the buffer section is bent, one end of the buffer section is provided with a first connecting section, the other end of the buffer section is provided with a second connecting section, the length of the buffer section is 1.5-3.5cm, the buffer section is in a wave shape, the buffer section at least comprises a wave peak section and a wave valley section, the adjacent peak sections are connected end to end, the sleeve is a spring sleeve, the pitch of a spring on the spring sleeve is smaller than the central distance between the adjacent peak section and the wave valley section, the utility model has good flexibility, sensitive touch, large buffering elasticity, no damage to blood vessels and safe and convenient operation.

Description

Guide wire

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a guide wire.

Background

The intervention is to establish a delivery path by using a guide wire, and to deliver an instrument or a diagnostic instrument into a human body through a catheter to diagnose and/or treat a lesion, and when the delivery path is established, the guide wire can be used for guidance until the distal end of the guide wire reaches a desired position in a blood vessel, and through retrieval, chinese patent CN206577228U discloses a guide wire, which comprises: the spring sheath, the guide wire outer layer and the end head are characterized by further comprising a mandrel and a traction part penetrating out of the guide wire outer layer; the guide wire outer layer is wrapped outside the mandrel, a channel is formed in the guide wire outer layer and comprises a near-end opening and a far-end opening, the traction part is contained in the channel, one end of the traction part penetrates out of the near-end opening, and the other end of the traction part penetrates out of the far-end opening and is tightly attached to the outer wall of the guide wire outer layer; chinese patent CN111330136A discloses a soft seal wire of improvement type, including inner core, winding, the one end of inner core is the near-end, and the other end is the distal end, and the one end of winding is connected the near-end, the other end of winding is connected the distal end, its characterized in that: the wire winding comprises a first section close to the far end and a second section close to the near end, the first section is a developing section, the second section is an elastic supporting section, and the first section and the second section are connected end to end; the outer periphery of the wire winding and the outer periphery of the inner core are respectively provided with an outer coating, the far end of the inner core is a hemispherical tip, and the essential defects of the two patents are as follows: firstly, the far end of the mandrel or the far end of the inner core in the two patents are both vertical, so that the far end of the mandrel or the far end of the inner core is hard, the forward acting force of the far end of the guide wire is large, and when the guide wire enters a blood vessel, particularly a weak position in human bodies such as a cardiovascular vessel and an intracranial vessel, the inner wall of the blood vessel is easily injured, medical accidents are caused, the treatment time of a patient is prolonged, and the treatment time and the treatment cost of the patient are increased; secondly, the far end of the mandrel or the far end of the inner core are both vertical, no buffer exists when the mandrel or the far end of the inner core is contacted with the blood vessel, when medical personnel sense that the guide wire is contacted with the blood vessel, the far end of the mandrel or the far end of the inner core can already puncture the blood vessel, and in addition, when the front end of the blood vessel is bent, the far end of the mandrel or the far end of the inner core is not easy to twist, so that the blood vessel is easy to stab.

Disclosure of Invention

The utility model aims to solve the defects of the prior art and provides the guide wire which is ingenious in structure, good in flexibility, sensitive in touch, large in buffering elasticity, safe and convenient to operate and free from damaging blood vessels.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a guide wire, includes end, core silk and sleeve pipe, and the core silk includes core silk distal end, core silk transition and core silk near-end, and core silk distal end one end interval is equipped with the end, the core silk distal end other end and core silk transition one end fixed connection, the core silk transition other end and core silk near-end fixed connection, the sleeve pipe is arranged in to core silk distal end and core silk transition, sleeve pipe one end and end fixed connection, the other end and core silk near-end fixed connection, its characterized in that: be equipped with the buffer segment on the core silk distal end, the buffer segment is crooked form to do benefit to and improve the compliance of core silk distal end through the buffer segment, reinforcing medical personnel's tactile feedback avoids the operation in-process to stab the blood vessel.

According to the utility model, one end of the buffer section is provided with the first connecting section, the other end of the buffer section is provided with the second connecting section, one end of the buffer section is fixedly connected with the first connecting section, the other end of the buffer section is fixedly connected with the second connecting section to form the far end of the core wire, the first connecting section and the second connecting section are both rod-shaped, the second connecting section is fixedly connected with the core wire gradual change section, so that when the guide wire enters a blood vessel, the buffer section is stressed and compressed, and the first connecting section and the second connecting section can well support the buffer section.

The length of the buffer section is 1.5-3.5cm, so that the space for compressing or stretching the far end of the core wire is increased.

The buffer section is in a wave shape, the buffer section at least comprises a peak section and a valley section, and the adjacent peak section and the adjacent valley section are fixedly connected end to end so as to be beneficial to the buffer section to be easily compressed or extended.

The sleeve is a spring sleeve, the pitch of the spring on the spring sleeve is smaller than the center distance between the adjacent wave peak section and the wave valley section, so that the sensitivity and the flexibility of the far end of the core wire are improved, when the guide wire enters a blood vessel, the buffer section is easy to compress and stretch, the flexibility is good, and the blood vessel is not damaged.

By adopting the structure, the utility model has the advantages of ingenious structure, good flexibility, sensitive touch, large buffering elasticity, no damage to blood vessels, safe and convenient operation and the like.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the core wire of the present invention.

Fig. 3 is an enlarged schematic view of the distal end of a core wire according to the present invention.

Reference numerals: the core wire comprises a tip 1, a core wire 2, a sleeve 3, a core wire far end 4, a core wire gradual change section 5, a core wire near end 6, a buffer section 7, a first connecting section 8 and a second connecting section 9.

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

For purposes of more clearly describing the present invention, the terms "distal" and "proximal" are defined herein as terms commonly used in the art of interventional medical devices, and specifically, "distal" refers to the end of the surgical procedure distal from the operator and "proximal" refers to the end of the surgical procedure proximal to the operator.

The utility model provides a guide wire, includes end 1, core silk 2 and sleeve pipe 3, and core silk 2 includes core silk distal end 4, core silk gradual change section 5 and core silk near-

end

6, and 4 one end intervals of core silk distal end are equipped with

end

1, and 4 other ends of core silk distal end and 5 one end fixed connection of core silk gradual change section, 5 other ends of core silk gradual change section and 6 fixed connection of core silk near-end, in sleeve pipe 3 is arranged in to core silk distal end 4 and core silk gradual change section 5, sleeve pipe 3 one end and 1 fixed connection in end, the other end and 6 fixed connection of core silk near-end, its characterized in that: be equipped with buffer segment 7 on core silk distal end 4, buffer segment 7 is crooked form to do benefit to and improve the compliance of core silk distal end through buffer segment, reinforcing medical personnel's tactile feedback avoids stabbing the blood vessel among the operation process.

According to the utility model, one end of the buffer section 7 is provided with the first connecting section 8, the other end of the buffer section 7 is provided with the second connecting section 9, one end of the buffer section 7 is fixedly connected with the first connecting section 8, the other end of the buffer section is fixedly connected with the second connecting section 9 to form the core wire far end 4, the first connecting section 8 and the second connecting section 9 are both rod-shaped, and the second connecting section 9 is fixedly connected with the core wire gradual-changing section 5, so that the buffer section is stressed and compressed when a guide wire enters a blood vessel, and the buffer section can be well supported by the first connecting section and the second connecting section.

The length of the buffer section 7 is 1.5-3.5cm, so that the space for compressing or stretching the far end of the core wire is increased.

The buffer section 7 is in a wave shape, the buffer section 7 at least comprises a peak section and a valley section, and the adjacent peak section and the adjacent valley section are fixedly connected end to end so as to be beneficial to the buffer section to be easily compressed or stretched.

The sleeve 3 is a spring sleeve, the center distance between the adjacent wave peak section and the wave valley section is larger than the pitch of the spring on the spring sleeve 3, so that the sensitivity and the flexibility of the far end of the core wire are improved, when the guide wire enters a blood vessel, the buffer section is easy to compress and stretch, the flexibility is good, and the blood vessel is not damaged.

Referring to the attached drawings 1-3, a core wire is sequentially a core wire far end, a core wire gradient section and a core wire near end from a far end to a near end, the core wire near end is used for pushing the core wire gradient section and the core wire far end to move in a blood vessel, the core wire gradient section is gradually thinned from the near end to the far end along the axial direction, the core wire far end is pushed to move in the blood vessel under the action of force transmitted by the core wire near end, the end head is hemispherical and is beneficial to a guide wire to enter human tissues, and the trafficability of the guide wire is enhanced. When in use, medical staff determines a proper blood vessel position, the distal end of the guide wire is pushed into the blood vessel through the proximal end of the guide wire, the core wire in the distal end of the guide wire is provided with a buffer section, when the core wire is blocked, the end head is blocked, the distal end of the core wire drives the distal end of the guide wire to compress and deform, so that the medical staff can quickly sense the blockage of the distal end of the guide wire, and conveniently change the guide wire in time, thereby avoiding puncturing the blood vessel, in addition, because the buffer section at the distal end of the core wire can drive the distal end of the guide wire to quickly compress and quickly extend, the medical staff can conveniently change the direction of the distal end of the guide wire by twisting the proximal end of the guide wire, thereby reducing the operation time, compared with the prior art that the distal end of the core wire in the distal end of the guide wire is vertical, the flexibility of the distal end of the guide wire in the utility model is better, the tactile feedback of the medical staff is more sensitive, the flexibility test of the distal end of the guide wire in the prior art that the distal end of the core wire is vertical, the test results are given in the following table:

from the five groups of test data in the table, it can be seen that the far end of the core wire is a vertical guide wire, the flexibility of the far end of the guide wire is smaller than that of the far end of the guide wire in the utility model, the far end of the core wire is a vertical guide wire, the average flexibility value of the far end of the guide wire is 8.8g, and the average flexibility value of the far end of the guide wire is 7.9 g.

Claims

1. The utility model provides a guide wire, includes end, core silk and sleeve pipe, and the core silk includes core silk distal end, core silk transition and core silk near-end, and core silk distal end one end interval is equipped with the end, the core silk distal end other end and core silk transition one end fixed connection, the core silk transition other end and core silk near-end fixed connection, the sleeve pipe is arranged in to core silk distal end and core silk transition, sleeve pipe one end and end fixed connection, the other end and core silk near-end fixed connection, its characterized in that: the far end of the core wire is provided with a buffer section which is in a bent shape.

2. A guidewire as claimed in claim 1, wherein: the core wire comprises a core wire transition section, a buffer section and a core wire transition section, wherein the buffer section is fixedly connected with the core wire transition section, one end of the buffer section is provided with a first connection section, the other end of the buffer section is provided with a second connection section, one end of the buffer section is fixedly connected with the first connection section, the other end of the buffer section is fixedly connected with the second connection section to form a core wire far end, the first connection section and the second connection section are both rod-shaped, and the second connection section is fixedly connected with the core wire transition section.

3. A guide wire according to claim 1 or 2, wherein: the length of the buffer section is between 1.5 and 3.5 cm.

4. A guidewire according to claim 3, wherein: the buffer section is in a wave shape and at least comprises a peak section and a valley section, and the adjacent peak sections and the adjacent valley sections are fixedly connected end to end.

5. A guidewire according to claim 4, wherein: the sleeve is a spring sleeve, and the pitch of a spring on the spring sleeve is smaller than the center distance between adjacent peak sections and adjacent valley sections.