CN217219296U - Support conveying device and catheter support system with same - Google Patents
Support conveying device and catheter support system with same Download PDFInfo
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- CN217219296U CN217219296U CN202220923914.5U CN202220923914U CN217219296U CN 217219296 U CN217219296 U CN 217219296U CN 202220923914 U CN202220923914 U CN 202220923914U CN 217219296 U CN217219296 U CN 217219296U
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Abstract
The utility model particularly relates to a support conveyor, it is used for the delivery support, and support conveyor includes: the device comprises an elongated core member, a proximal end connecting piece coaxially sleeved on the peripheral wall of the elongated core member, a distal end limiting ring sleeved on the peripheral wall of the elongated core member and a spring. The far end of the spring is at least partially coaxially and fixedly sleeved on the periphery of the near end part of the near end connecting piece, the far end limiting ring is arranged on one side of the far end of the near end connecting piece, and a limiting space for accommodating the developing piece of the bracket is formed between the far end of the near end connecting piece and the near end of the far end limiting ring. The utility model provides a support conveyor and have its pipe support system and guaranteed the spacing atress homogeneity and the stability of development piece near-end of support, and the terminal surface of near-end connecting piece as with the contact terminal surface of development piece, the homogeneity of further assurance atress has stable in structure reliably, the even advantage of atress.
Description
Technical Field
The utility model relates to the technical field of medical equipment, especially support conveyor and have its pipe support system.
Background
The procedure for intracranial stents to treat stenotic lesions of the cerebral blood vessels is generally: after the passage is established, the stent is pushed in the microcatheter or other passages through the delivery system to reach the position of the lesion blood vessel, and then the microcatheter is withdrawn to release the stent at the position of the lesion.
At present, the core wire of the slender core member is usually provided with a spring after grinding the distal end to increase the bending resistance, and the distal end of the spring is used as a limiting part of the bracket. Namely, the far end of the spring is fixed and then the support is pushed by the end face of the spring. The technical problem that the concentricity of the spring and the guide wire is difficult to guarantee exists when the support is pushed, and the pushing efficiency is reduced due to uneven stress of the support when the support is pushed. Therefore, there is a need to develop a stent delivery device and a catheter stent system having the same to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a support conveyor.
In order to achieve the above object, an embodiment of the present invention provides a stent conveying device, which is used for conveying a stent, the stent conveying device including:
an elongated core member;
a proximal connector coaxially sleeved to the outer peripheral wall of the elongated core member;
at least one of the spring and the near-end connector is fixedly connected with the slender core component, and at least part of the far end of the spring is coaxially sleeved on the periphery of the near-end part of the near-end connector;
the outer peripheral wall of the slender core component is fixedly sleeved with the far-end limiting ring, the far-end limiting ring is arranged on one side of the far end of the near-end connecting piece, and a limiting space for accommodating the developing piece of the support is formed between the far end of the near-end connecting piece and the near end of the far-end limiting ring.
As a further improvement of an embodiment of the present invention, the near-end connector is a T-shaped locating part, the T-shaped locating part includes a locating part body, a limiting head portion whose outer diameter is greater than the locating part body, wherein, the part of the spring is disposed at the proximal end portion of the locating part body.
As a further improvement of an embodiment of the present invention, the outer wall of the elongated core member includes an outer wall portion fixed to the inner wall of the stopper body, wherein an outer diameter of the outer wall portion is smaller than an outer diameter of an outer portion of the outer wall of the elongated core member other than the outer wall portion.
As a further improvement of an embodiment of the present invention, the limit head forms a push abutting end face perpendicular to the axial direction of the elongated core member and for parallel contact with the proximal end of the developing member.
As a further improvement of an embodiment of the present invention, the outer diameter of the limiting head is larger than the outer diameter of the spring.
As a further improvement of an embodiment of the present invention, the T-shaped locating part is provided with a through hole for the elongated core member to pass through, and the through hole is coaxially provided with the elongated core member.
As a further improvement of an embodiment of the present invention, the distal end retainer ring forms a withdrawal abutting end face perpendicular to the axial direction of the elongated core member and for parallel contact with the distal end of the developing member.
As a further improvement of an embodiment of the present invention, the distance between the proximal end connecting member and the distal end retainer ring is greater than the length between the two ends of the developing member.
As a further improvement of an embodiment of the present invention, at least a portion of the distal end of the spring is coaxially fixed to the outer periphery of the proximal portion of the proximal connector or is fixed to the outer periphery of the proximal portion of the proximal connector by an interference fit.
In order to solve the above technical problem, the following also provides a catheter stent system which is convenient to assemble.
A catheter stent system comprises a micro catheter, a transportation channel formed by the micro catheter and a stent arranged in the transportation channel, and further comprises a stent conveying device as described above, wherein the stent conveying device is arranged in the transportation channel and extends to the outer side of the near end of the transportation channel.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a support conveyor and have its pipe support system, through long and thin core component, the coaxial fixed setting of near-end connecting piece and spring, the homogeneity and the stability of the development piece near-end atress of support have been guaranteed, and the terminal surface of near-end connecting piece as the contact terminal surface with the development piece, the homogeneity of further assurance atress, the spacing space of formation between near-end connecting piece and the distal end spacing ring simultaneously, the accuracy nature of support transport position in the passageway has been guaranteed, and the structure is stable and reliable, the even advantage of atress.
Drawings
FIG. 1 is a schematic view of the catheter mounting system of the present invention;
FIG. 2 is a schematic structural view of the stent delivery device of the present invention;
fig. 3 is a schematic structural view of the elongated core member, the proximal end connector and the spring of the stent delivery device of the present invention viewed from the right;
fig. 4 is a schematic sectional view in the direction of a-a in fig. 3.
In the figure: 1. a microcatheter; 11. a transport channel; 2. a support; 21. a developing member; 3. a stent delivery device; 4. an elongated core member; 41. an outer wall portion; 5. a proximal connector; 51. a T-shaped limiting part; 52. a position limiting member body; 53. a limiting head; 54. pushing the abutting end face; 55. a through hole; 6. a spring; 7. a distal end stop collar; 71. a limiting space; 72. and withdrawing the abutting end face.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.
The term "proximal" as referred to in this embodiment refers to the end near the operator, and the term "distal" is the end opposite the proximal end.
Referring to fig. 1, in the present embodiment, the present invention mainly relates to: a catheter stent system comprises a micro catheter 1, a transportation channel 11 formed by the micro catheter 1 and a stent 2 arranged in the transportation channel 11, and further comprises a stent conveying device 3, wherein the stent conveying device 3 is arranged in the transportation channel 11 and extends to the outer side of the near end of the transportation channel 11.
The process of using the stent 2 for treating cerebrovascular stenosis is generally: the stent 2 is pushed to the position of the diseased blood vessel in the transportation channel 11 by the stent delivery device 3, and the micro-catheter 1 is withdrawn to release and open the stent 2 at the diseased position.
The stent delivery device 3 in this embodiment can also be used to transport the stent 2 in the channel formed by other medical devices, and the working process and working principle are the same as those in this application and will not be described too much here.
As shown in fig. 2, the present invention mainly relates to: a stent delivery device 3 for delivering a stent 2, the stent delivery device 3 comprising: the long and thin core component 4, the near end connecting piece 5 coaxially sleeved on the outer peripheral wall of the long and thin core component 4, the spring 6 coaxially sleeved on the outer peripheral wall of the near end connecting piece 5 and the far end limiting ring 7 fixedly sleeved on the outer peripheral wall of the long and thin core component 4, at least one of the near end connecting piece 5 and the spring 6 is fixedly connected with the long and thin core component 4.
The spring 6 is sleeved on the periphery of the proximal end connecting piece 5 and is arranged close to the proximal end of the proximal end connecting piece 5, and at least part of the distal end of the spring 6 is coaxially and fixedly sleeved or interference sleeved on the periphery of the proximal end part of the proximal end connecting piece 5, so that the spring 6 and the proximal end connecting piece 5 are integrated. In the prior art, the spring 6 is used as a proximal end limiting piece of the developing piece 21 of the bracket 2, the stress on the bracket 2 is uneven due to the inclination or unevenness of the end surface of the spring 6, the spring 6 and the proximal end connecting piece 5 are integrated, and the proximal end connecting piece 5 is used as a proximal end limiting piece of the developing piece 21 of the bracket 2, so that the technical problem can be solved. Preferably, the developing member 21 is provided in a ring-like structure.
The distal end limiting ring 7 is disposed at one side of the distal end of the proximal connecting member 5, and a limiting space 71 for accommodating the developing member 21 of the holder 2 is formed between the distal end of the proximal connecting member 5 and the proximal end of the distal end limiting ring 7, that is, the distal end of the proximal connecting member 5 and the proximal end of the distal end limiting ring 7 form a distance for limiting the developing member 21, so as to limit the developing member 21. The developing member 21 is preferably a developing ring.
In use, the distal end of the proximal connector 5 provides a distally-directed pushing force on the stent 2 by pushing the elongate core member 4, and the proximal end of the distal stop collar 7 provides a proximally-directed pulling force on the stent 2 by retracting the elongate core member 4 to effect movement of the stent 2 within the microcatheter 1, and ultimately the stent 2 to the desired release position.
Referring to fig. 3 and 4, the proximal connector 5 includes a T-shaped retaining member 51, the T-shaped retaining member 51 includes a retaining member body 52 and a retaining head 53 having an outer diameter larger than that of the retaining member body 52, wherein a portion of the spring 6 is disposed at a proximal portion of the retaining member body 52. The stopper body 52 is a portion of the T-shaped stopper 51 having a smaller outer diameter, and is fitted to the inner diameter of the spring 6, so that concentricity between the spring 6 and the elongated core member 4 can be ensured.
When the proximal connector 5 is fixedly attached to the elongate core member 4, the outer wall of the elongate core member 4 includes an outer wall portion 41 that is fixed to the inner wall of the retainer body 52. Preferably, the outer wall portion 41 is fixed to the inner wall of the stopper body 52 by welding. The outer diameter of the outer wall portion 41 is smaller than the outer diameter of the outer wall of the elongated core member 4 except for the outer wall portion 41, and the outer wall portion 41 is formed by grinding the elongated core member 4, so that the outer wall portion 41 is matched with the inner wall of the position limiting body 52, the concentricity of the spring 6 and the elongated core member 4 is further ensured, and the spatial arrangement of the developing part 21 and the catheter stent system is more uniform in the process of pushing the stent 2.
Further, the limiting head 53 is perpendicular to the axial direction of the elongated core member 4 and is used for pushing the abutting end face 54 in parallel contact with the near end of the developing part 21, the end face of the pushing abutting end face 54 is flat after being processed, when the bracket 2 is pushed by the pushing abutting end face 54, the near end of the developing part 21 can be in contact with the pushing abutting end face 54 at the same time, the stress is more uniform, and therefore the conveying efficiency of the bracket conveying device 3 for pushing the bracket 2 is improved.
Further, the outer diameter of the limiting head 53 is larger than that of the spring 6, so that the contact between the near end of the developing part 21 and the limiting head 53 is ensured to generate a limiting effect, the contact between the near end of the developing part 21 and the spring 6 is avoided, the stress uniformity of the support 2 is further ensured, and the conveying efficiency of the support conveying device 3 is improved.
Further, the T-shaped stopper 51 is provided with a through hole 55 through which the elongated core member 4 passes, and the through hole 55 is disposed coaxially with the elongated core member 4. In actual production, a welded gap is reserved between the inner wall of the through hole 55 and the elongated core member 4, and in this way, the coaxiality of the T-shaped stopper 51 and the elongated core member 4 can be ensured. Has the advantages of convenient processing and simple operation mode.
Further, the T-shaped limiting part 51 is formed by laser cutting of a circular ring structure, the T-shaped limiting part 51 is processed by laser cutting, the length of the T-shaped limiting part 51 can be controlled to be small, the bending rigidity of the elongated core member 4 at the position corresponding to the T-shaped limiting part 51 can be reduced, and the guide wire is more flexible when passing through the position of a bent blood vessel.
Further, the far-end limiting ring 7 is perpendicular to the axial direction of the elongated core member 4 and is used for a retracting butt end surface 72 which is in parallel contact with the far end of the developing part 21, the end surface of the retracting butt end surface 72 is smooth after being processed, when the bracket 2 is retracted by utilizing the pushing butt end surface 54, the far end of the developing part 21 and the retracting butt end surface 72 can be in simultaneous contact, the stress is more uniform, and therefore the conveying efficiency of the bracket conveying device 3 for retracting the bracket 2 is improved.
Further, the distance between the proximal connecting member 5 and the distal retaining ring 7 is greater than the length between the two ends of the developing member 21, so that the distal end of the proximal connecting member 5 is in contact with the stent 2 during the pushing process, the proximal end of the distal retaining ring 7 is in contact with the stent 2 during the retracting process, and the developing member 21 can be easily accommodated between the proximal connecting member 5 and the distal retaining ring 7.
Further, the slender core member 4 is fixed with the near-end connecting piece 5 and the far-end limiting ring 7 respectively in a welding mode, the slender core member 4, the near-end connecting piece 5 and the far-end limiting ring 7 form a whole in a welding mode, and meanwhile, the fixed distance between the near-end connecting piece 5 and the far-end limiting ring 7 for limiting the developing piece 21 has the advantages of being simple in processing mode and easy to achieve, and meanwhile, the stability of the whole structure can be improved.
Compared with the prior art, the utility model provides a support conveyor 3 and have its pipe support system, through long and thin core member 4, the coaxial fixed setting of near-end connecting piece 5 and spring 6, the homogeneity and the stability of the development 21 near-end atress of support 2 have been guaranteed, and the terminal surface of near-end connecting piece 5 as with the contact surface of development 21, the homogeneity of further assurance atress, spacing space 71 that forms between near-end connecting piece 5 and the distal end spacing ring 7 simultaneously, the accuracy nature of support 2 transport position in the passageway has been guaranteed, and has stable in structure and reliable, the even advantage of atress.
Finally, the above embodiments are intended only to illustrate the technical solutions of the present invention and not to limit the same, and although the present invention has been described in detail with reference to the above preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present invention defined by the appended claims.
Claims (10)
1. A stent delivery device for delivering a stent, comprising:
an elongated core member;
a proximal connector coaxially sleeved to the outer peripheral wall of the elongated core member;
at least one of the spring and the near-end connector is fixedly connected with the slender core component, and the far end of the spring is at least partially coaxially sleeved on the periphery of the near-end part of the near-end connector;
the outer peripheral wall of the slender core component is fixedly sleeved with the far-end limiting ring, the far-end limiting ring is arranged on one side of the far end of the near-end connecting piece, and a limiting space for accommodating the developing piece of the support is formed between the far end of the near-end connecting piece and the near end of the far-end limiting ring.
2. The stent delivery device of claim 1, wherein: the near-end connecting piece is a T-shaped limiting piece, the T-shaped limiting piece comprises a limiting piece body and a limiting head, the outer diameter of the limiting head is larger than that of the limiting piece body, and the spring is partially arranged on the near-end portion of the limiting piece body.
3. The stent delivery device of claim 2, wherein: the outer wall of the elongated core member includes an outer wall portion fixed to the inner wall of the retainer body, wherein the outer diameter of the outer wall portion is smaller than the outer diameter of the outer wall of the elongated core member except for the outer wall portion.
4. The stent delivery device according to claim 2, wherein: the spacing head forms a push abutment end face perpendicular to the axial direction of the elongated core member and for parallel contact with the proximal end of the developer.
5. The stent delivery device according to claim 2, wherein: the outer diameter of the limiting head is larger than that of the spring.
6. The stent delivery device according to claim 2, wherein: the T-shaped limiting part is provided with a through hole for the slender core component to penetrate through, and the through hole and the slender core component are coaxially arranged.
7. The stent delivery device of claim 1, wherein: the distal end retainer ring forms a withdrawal abutting end face perpendicular to the axial direction of the elongated core member and for parallel contact with the distal end of the developing member.
8. The stent delivery device of claim 1, wherein: the distance between the near-end connecting piece and the far-end limiting ring is larger than the length between the two ends of the developing piece.
9. The stent delivery device of claim 1, wherein: at least part of the far end of the spring is coaxially and fixedly sleeved or interference sleeved on the periphery of the near end part of the near end connecting piece.
10. The utility model provides a pipe support system, includes the transport passageway that little pipe, little pipe formed and sets up the support in the transport passageway, its characterized in that: the stent delivery device of any one of claims 1 to 9, further comprising a stent delivery device disposed within the delivery channel and extending outward of the proximal end of the delivery channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220923914.5U CN217219296U (en) | 2022-04-20 | 2022-04-20 | Support conveying device and catheter support system with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220923914.5U CN217219296U (en) | 2022-04-20 | 2022-04-20 | Support conveying device and catheter support system with same |
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| CN217219296U true CN217219296U (en) | 2022-08-19 |
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| CN202220923914.5U Active CN217219296U (en) | 2022-04-20 | 2022-04-20 | Support conveying device and catheter support system with same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116212200A (en) * | 2023-02-17 | 2023-06-06 | 上海励楷科技有限公司 | Delivery guide wire and stent delivery system |
| CN117017404A (en) * | 2023-09-19 | 2023-11-10 | 聚辉医疗科技(深圳)有限公司 | Stent delivery system |
-
2022
- 2022-04-20 CN CN202220923914.5U patent/CN217219296U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116212200A (en) * | 2023-02-17 | 2023-06-06 | 上海励楷科技有限公司 | Delivery guide wire and stent delivery system |
| CN116212200B (en) * | 2023-02-17 | 2025-08-01 | 上海励楷科技有限公司 | Delivery guidewire and stent delivery system |
| CN117017404A (en) * | 2023-09-19 | 2023-11-10 | 聚辉医疗科技(深圳)有限公司 | Stent delivery system |
| CN117017404B (en) * | 2023-09-19 | 2024-09-27 | 聚辉医疗科技(深圳)有限公司 | Stent Delivery System |
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