CN117481881A - Quick exchange microcatheter and stent delivery device - Google Patents
Quick exchange microcatheter and stent delivery device Download PDFInfo
- Publication number
- CN117481881A CN117481881A CN202311284392.4A CN202311284392A CN117481881A CN 117481881 A CN117481881 A CN 117481881A CN 202311284392 A CN202311284392 A CN 202311284392A CN 117481881 A CN117481881 A CN 117481881A
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- Prior art keywords
- microcatheter
- recoverable
- quick exchange
- exchange port
- guide wire
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- 239000012528 membrane Substances 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 6
- 239000002861 polymer material Substances 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims 1
- 238000007789 sealing Methods 0.000 abstract description 42
- 210000004204 blood vessel Anatomy 0.000 abstract description 14
- 239000008280 blood Substances 0.000 abstract description 6
- 210000004369 blood Anatomy 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000002490 cerebral effect Effects 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 210000002254 renal artery Anatomy 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
The invention provides a quick exchange microcatheter and a stent delivery device, belonging to the technical field of stent delivery devices; the quick exchange microcatheter comprises a microcatheter body, wherein a quick exchange port is formed in the side wall of the set distance of the distal end position of the microcatheter body, and is characterized in that a soft elastic recoverable sealing film is fixedly connected to the quick exchange port and used for a guide wire to pass through, the guide wire passes through the recoverable sealing film and is hooped by the recoverable sealing film, and when the guide wire is withdrawn from the microcatheter body, the perforation of the recoverable sealing film is recovered to seal the quick exchange port; the technical problems that blood is easy to enter a pushing catheter through a quick exchange port and the integrity of a micro-catheter is damaged by the quick exchange port due to the existence of the quick exchange port in the prior art, the micro-catheter has weak links, the operation efficiency is improved, the risk probability of operation is improved due to the weak links, and the guide wire cannot be effectively fixed after passing through the quick exchange port, so that the guide wire is easy to displace in a blood vessel and twist are solved.
Description
Technical Field
The invention belongs to the technical field of stent delivery devices, and particularly relates to a quick-exchange microcatheter and a stent delivery device.
Background
The stent is a supporting structure used in a lesion section of a blood vessel to achieve the effect of supporting the blood vessel in a narrow section, can reduce the elastic retraction and the remodelling of the blood vessel and keep the smooth circulation of the blood vessel, and is mainly divided into a coronary stent, a cerebral vessel stent, a renal artery stent, an aortic stent, a peripheral vessel stent and the like.
The existing self-expansion type stent is limited in a delivery catheter after being compressed before being installed, the delivery catheter delivers the stent to a focus position during installation, the stent is released, and the released stent supports a blood vessel after being automatically expanded at the focus position.
Specifically, when the delivery catheter delivers the stent to the focus position, the stent delivery device is needed to be used at first, the stent delivery device comprises an operation handle and a microcatheter, a rapid exchange port is formed at the position of 20 cm-35 cm far away from the microcatheter, after the operation microcatheter is deep into the vicinity of the focus position in a blood vessel, a guide wire is delivered into the blood vessel, the guide wire has the function of accurately positioning the focus position, the guide wire enters the microcatheter through the rapid exchange port on the microcatheter after reaching the vicinity of the focus position, then the microcatheter is guided to the accurate focus position, the guide wire is withdrawn, the delivery catheter is pushed into the microcatheter, and the delivery catheter carries the stent to the focus position and then releases the stent.
However, the microcatheter has the following problems due to the presence of the rapid exchange port:
(1) The microcatheter with the rapid exchange port cannot ensure the closure of the microcatheter, and if physiological saline or contrast agent is not injected in time after the guide wire is withdrawn, the rapid exchange port is easy to enter blood or an intermediate reinforcing layer to be in direct contact with the blood.
(2) The design of the traditional quick exchange port damages the integrity of the micro-catheter body, damages the support property and other performances of the micro-catheter body, causes the position of the quick exchange port to become a weak link, requires extra attention of doctors in operation, reduces the operation efficiency and improves the risk probability of operation.
(3) Because the diameter of the quick exchange port is larger than that of the guide wire, the guide wire passing through the quick exchange port cannot be properly fixed, and the guide wire can be displaced in a blood vessel, twisted and the like in the operation process.
(4) The existing quick exchange port is far away from the far end, and the resistance is large when the guide wire enters the microcatheter through the quick exchange port and advances to the far end, so that the operation is inconvenient.
Disclosure of Invention
The invention aims to provide a quick exchange microcatheter, which solves the technical problems that in the prior art, blood is easy to enter the microcatheter through a quick exchange port, the integrity of the microcatheter is damaged by the quick exchange port, the microcatheter has weak links, the operation efficiency is improved, the risk probability of an operation is improved, and a guide wire cannot be effectively fixed after passing through the quick exchange port, so that the guide wire is easy to displace in a blood vessel and twist; the invention also provides a stent delivery device to solve the technical problems.
In order to achieve the above object, the present invention provides the following technical solutions:
the quick exchange microcatheter comprises a microcatheter body, wherein a quick exchange port is formed in the side wall of the set distance of the distal end position of the microcatheter body, and the quick exchange microcatheter is characterized in that a soft elastic recoverable sealing film is fixedly connected to the quick exchange port and used for a guide wire to pass through, the guide wire is hooped by the recoverable sealing film after passing through the recoverable sealing film, and when the guide wire is withdrawn from the microcatheter body, the perforation of the recoverable sealing film is sealed to the quick exchange port.
As a further optimized technical scheme: the recoverable sealing film is made of TPU high polymer materials.
As a further optimized technical scheme: the recoverable sealing film is of an integrally formed sheet structure.
As a further optimized technical scheme: the recoverable sealing film is of a layered structure woven by silk TPU materials.
As a further optimized technical scheme: the microcatheter body comprises an outer layer tube body, an intermediate layer tube body and an inner layer tube body, wherein the hardness of the intermediate layer tube body is higher than that of the outer layer tube body and the inner layer tube body.
As a further optimized technical scheme: the middle layer pipe body is of a metal bracket structure.
As a further optimized technical scheme: the rapid exchange port is arranged in the range of 12cm-15cm near the far end of the microcatheter.
As a further optimized technical scheme: the thickness of the recoverable sealing film is smaller than that of the outer layer pipe body.
In order to achieve the above object, the stent delivery device of the present invention provides the following technical solutions:
a stent delivery device comprises an operating handle and a micro-catheter, wherein the micro-catheter is connected with the operating handle through a guide tube, a quick exchange port is arranged at a position, close to the far end, of the micro-catheter, and the micro-catheter is the quick exchange micro-catheter according to any one of the technical schemes.
As a further optimized technical scheme: the end of the microcatheter body is provided with a developing ring, and the developing ring is arranged on the middle layer tube body.
The beneficial effects of the quick exchange microcatheter of the invention are that: the quick exchange port of the micro-catheter is covered with the soft elastic recoverable sealing membrane, so that the micro-catheter cannot enter blood through the quick exchange port when a guide wire is not needed to enter, in addition, the weak links of the micro-catheter are eliminated after the quick exchange port is sealed through the recoverable sealing membrane, an operator does not need to pay extra distraction to the situation of the micro-catheter in the operation process, the operation efficiency is improved, and the operation risk is reduced; furthermore, as the recoverable sealing membrane has soft elasticity, the guide wire can be fastened and fixed by the recoverable sealing membrane after penetrating through the recoverable sealing membrane and entering the microcatheter, thereby effectively avoiding the conditions of displacement, torsion and the like of the guide wire in the microcatheter and improving the accuracy of operation.
The beneficial effects of the stent delivery device of the present invention are similar to those of a rapid exchange microcatheter and will not be described in detail herein.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. Wherein:
FIG. 1 is a schematic view of the overall structure of a stent delivery device according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is a schematic view of a guidewire traversing a recoverable closure membrane according to an embodiment of the present invention;
fig. 4 is a schematic view showing a state where a delivery catheter according to an embodiment of the present invention is extended into a microcatheter.
In the figure: 1. a microcatheter body; 11. an outer layer tube body; 12. an intermediate layer tube body; 13. an inner layer tube body; 2. a rapid exchange port; 3. a recoverable blocking film; 4. a guide wire; 5. an operation handle; 6. a gravitational tube; 7. a developing ring; 8. a delivery catheter.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
Example 1 of a stent delivery device of the present invention:
the invention provides a stent delivery device, which mainly covers a soft elastic recoverable sealing film on a quick exchange port on a microcatheter body, so that the weak link of the microcatheter is eliminated, the operation is more convenient, and meanwhile, the recoverable sealing film can be used for a guide wire to pass through, so that the quick exchange capability of the microcatheter is reserved, and the convenience is provided for the operation of the operation.
Specifically, as shown in fig. 1 and 2, the stent delivery device is composed of an operation handle 5, a microcatheter, and a gravitational tube 6, wherein the microcatheter is connected with the operation handle 5 through the gravitational tube 6, i.e., the gravitational tube 6 serves as a connecting transition piece of the operation handle 5 and the microcatheter. The handle 5 is convenient for the operator to grasp when twisting and delivering the microcatheter. A gravitational tube 6 is located between the microcatheter and the handle 5 for carrying and transmitting the load of the handle 5 to the microcatheter. The microcatheter in this embodiment is a quick exchange microcatheter, the quick exchange microcatheter includes a microcatheter body 1, one end far away from an operator is defined to be a 'far end', a quick exchange port 2 is formed in a side wall of a set distance at a far end position of the microcatheter body 1, a soft elastic recoverable sealing membrane 3 is fixedly connected to the quick exchange port 2 and used for allowing a guide wire 4 to pass through, the guide wire 4 passes through the recoverable sealing membrane 3 and then is tightly hooped and connected by the recoverable sealing membrane 3, at this time, due to the elastic characteristic of the recoverable sealing membrane 3, the perforation of the recoverable sealing membrane 3 tightly presses the guide wire 4 from the circumferential direction, thereby playing a role in fixing the guide wire 4, and in this way, the occurrence of displacement, torsion and other conditions of the guide wire 4 in a blood vessel can be effectively reduced in the operation process. When the guide wire 4 is withdrawn from the microcatheter body 1, the perforation of the recoverable closure membrane 3 is recovered to seal the rapid exchange port, and to be precise, the perforation of the recoverable closure membrane 3 cannot be recovered to a state without perforation, but the perforation can be recovered to a degree that can ensure sealing of the rapid exchange port 2, thereby ensuring the tightness of the rapid exchange port 2 and avoiding the situation that the microcatheter enters blood from the rapid exchange port 2.
In this embodiment, the recoverable sealing membrane 3 is made of a TPU polymer material, specifically a TPU polymer material with a brand number of TPU12A, and in this embodiment, the recoverable sealing membrane 3 is in an integrally formed sheet structure, so that the recoverable sealing membrane conveniently covers the quick exchange port 2 to seal the quick exchange port 2.
In this embodiment, the micro-catheter body 1 includes an outer layer tube 11, an intermediate layer tube 12 and an inner layer tube 13, wherein the intermediate layer tube 12 has a higher hardness than the outer layer tube 11 and the inner layer tube 13, and the intermediate layer tube 12 has a metal bracket structure in order to provide better support for the micro-catheter. In addition, in order to effectively image the position where the doctor can quickly locate the microcatheter, the tip of the microcatheter body 1 is provided with a developing ring 7, and the developing ring 7 is disposed on the intermediate layer tube 12.
In order to be able to facilitate the threading of the guide wire 4, the thickness of the recoverable closure film 3 is less than the thickness of the outer tube 11.
In this embodiment, the rapid exchange port 2 is disposed within a range of 5cm to 15cm near the distal end of the microcatheter, which further shortens the distance near the distal end of the microcatheter compared to the prior art.
In order to avoid the damage to the blood vessel when the microcatheter passes through the blood vessel, the tube body of the microcatheter processed at the far end is softer, so after the quick exchange port 2 is arranged, the supporting performance of the far end of the microcatheter is further reduced due to the broken tube wall, and the quick exchange port 2 is arranged at a back position in order to avoid the deformation of the far end of the microcatheter in the operation process, but in the invention, the existence of the recoverable sealing membrane 3 eliminates the weak link of the microcatheter, and the supporting performance of the quick exchange port 2 is improved, so the quick exchange port 2 is arranged at a position closer to the far end, thereby facilitating the guide wire 4 to quickly guide the microcatheter to a designated position after entering, and facilitating the guide wire 4 to push to the far end after entering the microcatheter because the quick exchange port 2 is closer to the far end, thereby facilitating the guide of the microcatheter to a more accurate focus position.
When the invention is specifically used, firstly, the micro-catheter is pushed to the vicinity of a focus position, then the guide wire 4 is delivered into a blood vessel, as shown in fig. 3, after the guide wire 4 reaches the vicinity of the focus position, the micro-catheter enters the micro-catheter by penetrating the recoverable sealing membrane 3 on the rapid exchange port 2, then the micro-catheter is guided to reach the accurate focus position, the guide wire 4 is withdrawn, the delivery catheter 8 reaches the focus position along the micro-catheter and releases the internal stent, at this time, the recoverable sealing membrane 3 is pushed to the outer side of the micro-catheter by the delivery catheter 8 due to the shape and flexibility of the recoverable sealing membrane 3, the lumen of the micro-catheter is not occupied, and more room is left for the delivery catheter 8 and the instrument.
In other embodiments of the stent delivery device: the difference between this embodiment and embodiment 1 is that in embodiment 1, the recoverable sealing film is made of TPU polymer material, and in this embodiment, the recoverable sealing film may be made of rubber material.
In other embodiments of the stent delivery device: the difference between this embodiment and embodiment 1 is that in embodiment 1, the recoverable sealing membrane is an integrally formed sheet structure, in this embodiment, the recoverable sealing membrane is a layered structure woven by using a thread-shaped TPU material, and perforations are formed between the thread-shaped TPU materials, and because the TPU material has good elasticity, the perforations keep a sealing state in a normal state, and when the guide wire needs to pass through the recoverable sealing membrane, the guide wire can pass through the perforation directly, so that compared with an integral structure, the guide wire is more convenient to penetrate.
In other embodiments of the stent delivery device: the difference between this embodiment and embodiment 1 is that in embodiment 1, no perforation is provided on the recoverable sealing membrane, the perforation is formed after the guide wire passes through, and in this embodiment, a perforation may be reserved on the recoverable sealing membrane, so that the guide wire can conveniently penetrate, and the perforation is contracted to a sealing state under a normal state due to the elastic action of the recoverable sealing membrane.
Example 1 of a rapid exchange microcatheter of the invention:
the specific structure of the rapid exchange microcatheter in this embodiment is the same as that of the rapid exchange microcatheter described in any of the above embodiments, and will not be described here.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a quick exchange microcatheter, includes microcatheter body (1) be provided with quick exchange port (2) on the lateral wall of microcatheter body (1) distal end position settlement distance, a serial communication port, quick exchange port (2) are last to be connected with soft elastic recoverable seal membrane (3) for supply seal wire (4) to pass, and seal wire (4) are passed recoverable seal membrane (3) after being passed recoverable seal membrane (3) and are strapped by recoverable seal membrane (3), and after seal wire (4) withdraw from microcatheter body (1), perforation recovery of recoverable seal membrane (3) is sealed to quick exchange port (2).
2. The rapid exchange microcatheter according to claim 1, wherein the recoverable closure membrane (3) is made of TPU polymer material.
3. The rapid exchange microcatheter according to claim 2, wherein the recoverable closure membrane (3) is an integrally formed sheet structure.
4. The rapid exchange microcatheter according to claim 2, wherein the recoverable closure membrane (3) is a layered structure woven from a filamentous TPU material.
5. The rapid exchange microcatheter according to any of claims 1-4, wherein the microcatheter body (1) comprises an outer layer tube (11), an intermediate layer tube (12) and an inner layer tube (13), the intermediate layer tube (12) having a higher hardness than the outer layer tube (11) and the inner layer tube (13).
6. The rapid exchange microcatheter of claim 5, wherein the intermediate layer tube (12) is a metallic stent structure.
7. The rapid exchange microcatheter of claim 5, wherein the rapid exchange port (2) is positioned in the range of 5cm to 15cm proximal to the distal end of the microcatheter.
8. The rapid exchange microcatheter according to claim 7, wherein the thickness of the recoverable closure membrane (3) is less than the thickness of the outer tube body (11).
9. A stent delivery device comprising an operating handle (5) and a microcatheter connected to the operating handle (5) by a catheter (6), wherein a rapid exchange port (2) is provided in the microcatheter near the distal end, characterized in that the microcatheter is a rapid exchange microcatheter according to any of claims 1-8.
10. Stent delivery device according to claim 9, characterized in that the tip of the microcatheter body (1) is provided with a developing ring (7), the developing ring (7) being provided on an intermediate tube body (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311284392.4A CN117481881A (en) | 2023-10-07 | 2023-10-07 | Quick exchange microcatheter and stent delivery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311284392.4A CN117481881A (en) | 2023-10-07 | 2023-10-07 | Quick exchange microcatheter and stent delivery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117481881A true CN117481881A (en) | 2024-02-02 |
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ID=89671592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311284392.4A Pending CN117481881A (en) | 2023-10-07 | 2023-10-07 | Quick exchange microcatheter and stent delivery device |
Country Status (1)
| Country | Link |
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| CN (1) | CN117481881A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307547A (en) * | 2008-09-10 | 2012-01-04 | Ev3股份有限公司 | Stents and catheters having improved stent depoyment |
| CN105983167A (en) * | 2015-03-20 | 2016-10-05 | 泰尔茂株式会社 | Catheter |
| CN111481265A (en) * | 2020-05-26 | 2020-08-04 | 沈阳新智源医疗用品有限公司 | Quick-exchange type blood vessel thrombus removal device |
| US20210196931A1 (en) * | 2018-08-24 | 2021-07-01 | Kaneka Corporation | Delivery device for medical tubular body |
| CN113967115A (en) * | 2020-07-22 | 2022-01-25 | 上海启功医疗科技有限公司 | Support and support delivery system |
| CN217697598U (en) * | 2022-02-23 | 2022-11-01 | 深圳北芯生命科技股份有限公司 | Catheter and catheter implantation device |
| WO2023118183A1 (en) * | 2021-12-22 | 2023-06-29 | Medtronic Ireland Manufacturing Unlimited Company | Catheter with hypotube having exchange joint opening |
-
2023
- 2023-10-07 CN CN202311284392.4A patent/CN117481881A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102307547A (en) * | 2008-09-10 | 2012-01-04 | Ev3股份有限公司 | Stents and catheters having improved stent depoyment |
| CN105983167A (en) * | 2015-03-20 | 2016-10-05 | 泰尔茂株式会社 | Catheter |
| US20210196931A1 (en) * | 2018-08-24 | 2021-07-01 | Kaneka Corporation | Delivery device for medical tubular body |
| CN111481265A (en) * | 2020-05-26 | 2020-08-04 | 沈阳新智源医疗用品有限公司 | Quick-exchange type blood vessel thrombus removal device |
| CN113967115A (en) * | 2020-07-22 | 2022-01-25 | 上海启功医疗科技有限公司 | Support and support delivery system |
| WO2023118183A1 (en) * | 2021-12-22 | 2023-06-29 | Medtronic Ireland Manufacturing Unlimited Company | Catheter with hypotube having exchange joint opening |
| CN217697598U (en) * | 2022-02-23 | 2022-11-01 | 深圳北芯生命科技股份有限公司 | Catheter and catheter implantation device |
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