CN117814866B - An embolic delivery system - Google Patents
An embolic delivery system Download PDFInfo
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- CN117814866B CN117814866B CN202311814464.1A CN202311814464A CN117814866B CN 117814866 B CN117814866 B CN 117814866B CN 202311814464 A CN202311814464 A CN 202311814464A CN 117814866 B CN117814866 B CN 117814866B
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- 230000003073 embolic effect Effects 0.000 title claims description 45
- 230000001681 protective effect Effects 0.000 claims abstract description 149
- 208000005189 Embolism Diseases 0.000 claims abstract description 24
- 239000002861 polymer material Substances 0.000 claims abstract description 21
- 230000003902 lesion Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 230000010102 embolization Effects 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 16
- 238000000034 method Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 206010002329 Aneurysm Diseases 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 229920002614 Polyether block amide Polymers 0.000 description 2
- 229910000416 bismuth oxide Inorganic materials 0.000 description 2
- TYIXMATWDRGMPF-UHFFFAOYSA-N dibismuth;oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Bi+3].[Bi+3] TYIXMATWDRGMPF-UHFFFAOYSA-N 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 210000001367 artery Anatomy 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013161 embolization procedure Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12027—Type of occlusion
- A61B17/12031—Type of occlusion complete occlusion
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/1214—Coils or wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/12—Surgical instruments, devices or methods for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels or umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Reproductive Health (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Neurosurgery (AREA)
- Surgical Instruments (AREA)
Abstract
The invention provides an embolism conveying system, which belongs to the technical field of medical appliances and comprises a pushing device and a first protective sheath, wherein a first accommodating cavity for accommodating a embolism is formed in the first protective sheath, the pushing device is arranged in the first accommodating cavity in a sliding mode, the outer diameter of the first protective sheath is at least smaller than the inner diameter of a part of conveying catheters, and the distal end head of the first protective sheath is made of a high polymer material.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an embolism conveying system.
Background
The coil embolism operation is one method of treating aneurysm, and is to isolate the aneurysm from normal artery through several coils of metal alloy material to prevent blood from entering the aneurysm and rupture and bleeding.
A spring coil system as disclosed in chinese patent document CN113951964B, comprising a microcatheter and embolic coils housed within the microcatheter, in operation, a plurality of embolic coils are delivered to a focal location through the microcatheter.
However, in the above-mentioned scheme, when using, the coils with different specifications need to be matched with the conveying pipes with corresponding specifications, so that the sizes of the coils are matched with those of the conveying pipes, and the coils with different sizes cannot be compatible with the conveying pipes.
In performing a coil embolization procedure, a user often needs to use one or more delivery catheters of different sizes to fit in place, depending on the location of the lesion. The specification of the spring ring needs to be selected according to the path, the diameter of the blood vessel and the like, if one spring ring can be compatible with a plurality of delivery catheters simultaneously, the time and the cost for a doctor to exchange the delivery catheters can be greatly reduced, namely, the spring ring can complete the service life more economically, effectively and conveniently. And will also reduce (to accommodate spring coil SKUs of different systems) the corresponding production costs.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that different delivery catheters cannot be compatible with the embolization with unmatched sizes in the prior art, so as to provide an embolization delivery system capable of simultaneously being compatible with multiple delivery catheters with different sizes.
In order to solve the technical problems, the invention provides an embolism conveying system which is used for being matched with conveying catheters with various inner diameters, the embolism conveying system comprises a pushing device and a first protective sheath, a first accommodating cavity for accommodating a embolism is formed in the first protective sheath, the pushing device is arranged in the first accommodating cavity in a sliding mode, the outer diameter of the first protective sheath is at least smaller than the inner diameter of a part of conveying catheters, and the distal end head of the first protective sheath is made of a high polymer material.
Optionally, the outer diameter of the first protective sheath is larger than the inner diameter of the first conveying catheter, the inner diameter of the first accommodating cavity is matched with the inner diameter of the first conveying catheter, and the first protective sheath is supported at the proximal end of the first conveying catheter when conveying by adopting the first conveying catheter.
Optionally, the outer diameter of the first protective sheath is matched with the inner diameter of the second conveying catheter, and when the second conveying catheter is adopted for conveying, the first protective sheath stretches into the second conveying catheter and moves towards the focus position through the guide of the second conveying catheter.
Optionally, a first fixing device is disposed between the proximal end of the first protective sheath and the pushing device.
Optionally, the first fixing device is a fixing sleeve with two ends having different inner diameters.
Optionally, the device further comprises a second protection sheath tube, wherein the second protection sheath tube is provided with a second accommodating cavity, the first protection sheath tube is inserted into the second accommodating cavity in a sliding mode, the outer diameter of the second protection sheath tube is larger than the inner diameter of the second conveying catheter, the inner diameter of the second accommodating cavity is matched with the inner diameter of the second conveying catheter, and when the second conveying catheter is adopted for conveying, the second protection sheath tube is supported at the proximal end of the second conveying catheter.
Optionally, the device further comprises a second protective sheath, wherein the second protective sheath is provided with a second accommodating cavity, the first protective sheath is inserted into the second accommodating cavity in a sliding mode, the outer diameter of the second protective sheath is matched with the inner diameter of a third conveying catheter, and when the third conveying catheter is adopted for conveying, the second protective sheath stretches into the third conveying catheter and moves towards a focus position through guidance of the third conveying catheter.
Optionally, the hardness of the second protective sheath is greater than the hardness of the first protective sheath.
Optionally, the first protective sheath and/or the second protective sheath are developable.
Optionally, at least the distal head of the first protective sheath and/or the second protective sheath is a polymeric material.
Optionally, the distal end and the proximal end of the second protective sheath are made of different polymer materials, and the two polymer materials are spliced and connected.
Optionally, lubricating particles are added into the polymer material at the proximal end of the second protective sheath.
Optionally, a second fixing device is arranged between the proximal end of the second protective sheath and the first protective sheath.
Optionally, the second fixing device is a fixing sleeve with two ends having different inner diameters.
Optionally, the smaller inner diameter end of the fixed sleeve has an openable structure.
The technical scheme of the invention has the following advantages:
1. When the embolism conveying system provided by the invention adopts the conveying guide pipe with larger inner diameter to convey the embolism, the first protective sheath pipe can extend into the conveying guide pipe and convey the embolism in a mode of extending towards the focus position of a human body along the conveying guide pipe, so that the problem that the diameter of the embolism is not matched with the inner diameter of the conveying guide pipe is avoided, the aim that one embolism can be compatible with a plurality of conveying guide pipes at the same time is realized, and the time and cost for a doctor to exchange the conveying guide pipes can be greatly reduced.
2. According to the embolic delivery system provided by the invention, the first protective sheath and the second protective sheath are arranged to be matched with a plurality of delivery catheters with different inner diameters, so that the suitability of products is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a front view of one embodiment of an embolic delivery system provided in example 1 of the present invention;
FIG. 2 is a front view of a second method of using the embolic delivery system provided in embodiment 1;
FIG. 3 is a front view of one embodiment of the proximal mating of the pusher and the primary protective sheath;
FIG. 4 is a front view of one embodiment of a fixation device;
FIG. 5 is a front view of the fixture of FIG. 4 in use;
FIG. 6 is a schematic illustration of a second embodiment of the proximal mating of a pusher device and a primary protective sheath;
FIG. 7 is a front view of a second embodiment of a fixation device;
FIG. 8 is a front view of the fixture of FIG. 7 in use;
FIG. 9 is a front view of one embodiment of an embolic delivery system provided in example 2 of the present invention;
FIG. 10 is a front view of a second method of using the embolic delivery system provided in embodiment 2 of the present invention;
Fig. 11 is a front view showing a third method of using the embolic delivery system provided in embodiment 2 of the present invention.
Reference numerals illustrate:
1. the device comprises a pushing device, a first protective sheath, a first conveying catheter, a second conveying catheter, a first fixing device, a second fixing device, a third conveying catheter, a second fixing device, an openable structure, a first end with smaller inner diameter, a second end with larger inner diameter, a third conveying catheter, a second fixing device, a first opening structure, a second opening structure, a first conveying catheter, a second opening structure, a first fixing device, a second fixing device, a third conveying catheter, a third fixing device, a openable structure, a first end with smaller inner diameter, a second end with larger inner diameter and a third fixing device.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The embolic delivery system provided by the present embodiment can be used to cooperate with a variety of delivery catheters of different inner diameters to deliver the embolic 3.
As shown in FIG. 1, a specific implementation mode of the embolic delivery system provided by the embodiment comprises a pushing device 1 and a first protective sheath 2, wherein a first accommodating cavity for accommodating an embolic 3 is formed in the first protective sheath 2, the pushing device 1 is slidably arranged in the first accommodating cavity, and the outer diameter of the first protective sheath 2 is at least smaller than the inner diameter of a part of the delivery catheter. In other words, the embolic delivery system provided in this embodiment has a plurality of delivery catheters available for cooperation, each of the delivery catheters having a different inner diameter, the outer diameter of the primary protective sheath 2 of this embodiment being at least smaller than the inner diameter of a portion of the delivery catheters of the plurality of delivery catheters. When the plug 3 is conveyed by adopting the conveying conduit with larger inner diameter, the first protective sheath 2 can be conveyed by extending into the conveying conduit and extending along the conveying conduit towards the focus position of the human body, so that the problem that the diameter of the plug 3 is not matched with the inner diameter of the conveying conduit is avoided, and the plug 3 can be stably implanted into the human body.
In this embodiment, the plug may be a spring coil. Of course, this example is not limiting, and in some alternative embodiments the plug may be other elongated plug structures, such as braided plug structures, and the like.
In this embodiment, as shown in fig. 1, the outer diameter of the first protecting sheath 2 is larger than the inner diameter of the first delivery catheter 4, the inner diameter of the first accommodating cavity is matched with the inner diameter of the first delivery catheter 4, the first protecting sheath 2 is supported at the proximal end of the first delivery catheter 4 when the first delivery catheter 4 is used for delivery, specifically, when the first delivery catheter 4 is used for delivery, the distal end of the first protecting sheath 2 can be abutted to the catheter seat, then the plug 3 in the first accommodating cavity is pushed out from the distal end of the first protecting sheath 2 by the pushing device 1, and further the plug 3 enters the first delivery catheter 4, the pushing device 1 is pushed continuously, so that the plug 3 is delivered in the first delivery catheter 4, and finally reaches the focus of the human body.
In this embodiment, as shown in fig. 2, the outer diameter of the first protecting sheath 2 is matched with the inner diameter of the second delivery catheter 5, when the second delivery catheter 5 is used for delivery, the first protecting sheath 2 stretches into the second delivery catheter 5 and moves towards the focus position through the guidance of the second delivery catheter 5, specifically, when the second delivery catheter 5 is used for delivery, the distal end of the first protecting sheath 2 can be inserted into the second delivery catheter 5 from the catheter seat of the second delivery catheter 5, then the first protecting sheath 2 is pushed, the length of the first protecting sheath 2 is larger than the length of the delivery catheter, the first protecting sheath 2 carries the embolism 3 with the embolism 3 in the second delivery catheter 5, and after reaching the focus position, the embolism 3 is pushed out of the first accommodating cavity of the second delivery catheter 5 through the pushing device 1, so that the focus is reached.
In summary, in the embolic delivery system provided in this embodiment, the inner diameter of the first accommodating cavity of the first protecting sheath 2 is matched with the inner diameter of the first delivery catheter 4, and the outer diameter of the first protecting sheath 2 is matched with the inner diameter of the second delivery catheter 5. Through the arrangement, the purpose that one embolism 3 can be compatible with a plurality of delivery catheters is achieved, and the time and cost for exchanging the delivery catheters by doctors can be greatly reduced.
As shown in fig. 2, in the embolic delivery system provided in this embodiment, a first fixing device 6 is disposed between the proximal end of the first protecting sheath 2 and the pushing device 1. The first fixing device 6 is used for relatively fixing the first protecting sheath 2 and the pushing device 1, so that the pushing device 1 and the first protecting sheath 2 can not move mutually in the process of conveying the first protecting sheath 2 in the conveying catheter.
As shown in fig. 3, when the structure between the proximal end of the primary protective sheath 2 and the proximal end of the pushing device 1 is such that the proximal end of the pushing device 1 protrudes from one side of the proximal end of the primary protective sheath 2. That is, a cut is formed at one side of the proximal end of the primary protective sheath 2, and the proximal end of the pushing device 1 may be passed out from the side wall of the primary protective sheath 2. In this structure, the outer diameter of the pushing device 1 is a, the inner diameter of the primary protecting sheath 2 is b, and the outer diameter of the primary protecting sheath 2 is c, wherein a < b. For this structure, the first fixing means 6 as shown in fig. 4 may be employed.
As shown in fig. 4, the first fixing device 6 is a fixing sleeve with two ends having different inner diameters, specifically, the fixing sleeve includes an end 12 with a larger inner diameter and an end 11 with a smaller inner diameter, wherein the inner diameter of the end 11 with the smaller inner diameter is e, and the inner diameter of the end 12 with the larger inner diameter is d, where e < d.
When in use, as shown in fig. 5, the first fixing device 6 is sleeved at the proximal end of the pushing device 1 and the first protecting sheath 2, wherein the end 12 with the larger inner diameter is sleeved on the first protecting sheath 2, and the end 11 with the smaller inner diameter is sleeved on the pushing device 1, so that e < a+b < d > is specifically satisfied, and the fixing of the pushing device and the first protecting sheath is realized through tight fit.
As shown in fig. 6, when the structure between the proximal end of the primary protective sheath 2 and the proximal end of the pushing device 1 is such that the proximal end of the pushing device 1 protrudes from the end wall of the proximal end of the primary protective sheath 2. In this structure, the outer diameter of the pushing device 1 is a, the inner diameter of the primary protecting sheath 2 is b, and the outer diameter of the primary protecting sheath 2 is c, wherein a < b. A first fixing means 6 as shown in fig. 7 may be employed.
As shown in fig. 7, the first fixing device 6 is a fixing sleeve with two ends having different inner diameters, specifically, the fixing sleeve includes an end 12 with a larger inner diameter and an end 11 with a smaller inner diameter, wherein the inner diameter of the end 11 with the smaller inner diameter is e, and the inner diameter of the end 12 with the larger inner diameter is d, where e < d. And, the smaller inner diameter end 11 of the fixed sleeve has an openable structure 10.
When the device is used, as shown in fig. 8, one end 12 with a larger inner diameter of the fixed sleeve is sleeved on the first protective sheath 2 to meet the requirement of c < d, one end 11 with a smaller inner diameter of the fixed sleeve is sleeved on the pushing device 1 to meet the requirement of a not less than e, and the first protective sheath 2 and the pushing device 1 are fixed relatively through the respective fixation of the fixed sleeves.
In this embodiment, the openable structure 10 of the smaller inner diameter end 11 of the fixed sleeve is not limited, and may be a structure in which one end is connected through a rotating shaft and the other end is locked through a clamping connection, or may be locked by a fastening connection.
In the present embodiment, the use of the first delivery catheter 4 and the second delivery catheter 5 is not particularly limited, and the first delivery catheter 4 may be a microcatheter, and the second delivery catheter 5 may be a contrast catheter, or the like.
In addition, in this embodiment, the first protective sheath 2 may have developability, and specific implementation manners include, but are not limited to, adding a developing material into polymer material particles, thereby developing the whole body after molding, wherein the developing material includes barium sulfate, bismuth oxide, tungsten powder, etc., or forging a developing ring at a position of 0-2cm, for example, at a head end of the first protective sheath 2, wherein the developing ring is made of a material with developability such as Pt/Ir, etc., or heat shrinking a heat shrinking tube with a section of the developing material added at a position of 0-2cm, for example, at the head end of the first protective sheath 2.
In this embodiment, the first protective sheath 2 meets the requirements of low friction coefficient, over-bending performance and supporting performance, and the implementation manner meeting the requirements includes, but is not limited to, ① using a polymer material with a low friction coefficient and good supporting performance, such as PTFE, HDPE, POM, and the like, performing stretching reducing treatment on the head end of the first protective sheath so as to enable the first protective sheath to have good passing performance, ② using a polymer material with a good over-bending performance and a certain supporting performance, such as Pebax, nylon, and the like, adding lubricating particles into the polymer material so as to enable the friction coefficient of the first protective sheath to be reduced, or splicing the ① polymer material and the ② polymer material, namely, a ① material at the far end and a ② material at the near end, and connecting and fixing the first protective sheath by using a mode such as thermal welding, laser welding, resistance welding, and the like.
In use, as shown in fig. 1, when the inner diameter of the adopted delivery catheter is smaller than the outer diameter of the first protection sheath 2, the embolic delivery system provided by the embodiment comprises the steps of butting the distal end of the first protection sheath 2 onto the catheter seat, pushing out the embolic material 3 positioned in the first accommodating cavity from the distal end of the first protection sheath 2 through the pushing device 1, further enabling the embolic material 3 to enter the first delivery catheter 4, continuing pushing the pushing device 1, and enabling the embolic material 3 to be delivered in the first delivery catheter 4 and finally reaching the focus position of the human body.
As shown in fig. 2, when the inner diameter of the employed delivery catheter is larger than the outer diameter of the primary protective sheath 2, the steps of:
Disposing the pushing device 1 and the plug 3 in the primary accommodation cavity of the primary protective sheath 2;
At the proximal end of the primary protective sheath 2, relatively fixing the pushing device 1 and the primary protective sheath 2;
inserting the distal end of the primary protective sheath 2 into a delivery catheter and extending into a lesion site of a human body along the delivery catheter;
After the distal end of the first protective sheath 2 reaches the focus position of the human body, the relative fixation of the pushing device 1 and the first protective sheath 2 is released, and the embolism 3 is conveyed to the focus position of the human body from the distal end of the first protective sheath 2 through the pushing device 1.
The embolic delivery system provided in this embodiment achieves the purpose that one embolic 3 can be compatible with multiple delivery catheters simultaneously, and can greatly reduce the time and cost for a doctor to exchange delivery catheters.
Example 2
As shown in fig. 9, a specific implementation manner of the embolic delivery system provided in this embodiment further includes a second protective sheath 7 on the basis of embodiment 1. The second protective sheath 7 is provided with a second accommodating cavity, the first protective sheath 2 is inserted into the second accommodating cavity in a sliding way, the outer diameter of the second protective sheath 7 is larger than the inner diameter of the second conveying catheter 5, the inner diameter of the second accommodating cavity is matched with the inner diameter of the second conveying catheter 5, and when the second conveying catheter 5 is adopted for conveying, the second protective sheath 7 is supported at the proximal end of the second conveying catheter 5.
As shown in fig. 9, in the embolic delivery system provided in this embodiment, when the second delivery catheter 5 is used for delivery, the embolic delivery system includes the following steps:
the distal end of the second protective sheath 7 is first butt-jointed to the catheter hub of the second delivery catheter 5, so that the second protective sheath 7 plays a supporting role to ensure the stability of the first protective sheath 2 when being pushed.
The first protective sheath 2 is then advanced into the second delivery catheter 5, thereby carrying the plug 3 and the pushing device 1 along said second delivery catheter 5.
The embolization further, when delivered using the second delivery catheter 5, comprises the steps of:
the distal end of the second protective sheath 7 is first butt-jointed to the catheter hub of the second delivery catheter 5, so that the second protective sheath 7 plays a supporting role to ensure the stability of the first protective sheath 2 when being pushed.
The second fixing means 9 (removed and therefore not shown) at the proximal end of the first and second protective sheaths 2, 7 are then removed, and the first protective sheath 2 is advanced into the second delivery catheter 5, thereby carrying the plug 3 and the pushing device 1 along said second delivery catheter 5.
When the embolism 3 and the first protective sheath 2 reach the focus position, the first protective sheath 2 and the first fixing device 6 at the proximal end of the pushing device 1 are removed, and the embolism 3 is pushed out of the distal end of the first protective sheath 2 to reach the focus position of the human body through the pushing device 1.
As shown in fig. 10, in the embolic delivery system provided in this embodiment, when the first delivery catheter 4 is used for delivery, the embolic delivery system includes the following steps:
The first protective sheath 2 is first pushed out of the distal end of the second protective sheath 7, pushing out the second protective sheath 7.
The distal end of the primary protective sheath 2 is then coupled to the catheter hub of the primary delivery catheter 4.
And pushing out the embolism 3 from the first protective sheath 2 by the pushing device 1, so that the embolism 3 enters the first conveying catheter 4 and enters the focus position of the human body along the first conveying catheter 4.
Further, when the first delivery catheter 4 is used for delivery, the method comprises the following steps:
The first protective sheath 2 and the second protective sheath 7 are assembled, the distal end portion of the first protective sheath 2 is pushed out of the second protective sheath 7, and a second fixing device 9 is installed between the first protective sheath 2 and the second protective sheath 7. The distal end of the primary protective sheath 2 is then coupled to the catheter hub of the primary delivery catheter 4.
The first protective sheath 2 and the first securing means 6 (removed and therefore not shown) proximal to the pusher 1 are removed, and the plug 3 is pushed out of the first protective sheath 2 by the pusher 1, allowing the plug 3 to enter the first delivery catheter 4 and along the first delivery catheter 4 into the lesion site of the human body.
In this embodiment, the hardness of the second protective sheath 7 is greater than the hardness of the first protective sheath 2. With this arrangement, the first protective sheath 2 can be ensured to be smoothly conveyed within the second protective sheath 7. Of course, this is not limiting, and in some alternative embodiments the hardness of the primary protective sheath 2 and the secondary protective sheath 7 may be the same.
As shown in fig. 11, in the embolic delivery system provided in this embodiment, the outer diameter of the second protective sheath 7 is matched with the inner diameter of the third delivery catheter 8, that is, in the embolic delivery system provided in this embodiment, the inner diameter of the second accommodating chamber of the second delivery catheter 5 is matched with the inner diameter of the second delivery catheter 5, and the outer diameter of the second delivery catheter 5 is matched with the inner diameter of the third delivery catheter 8.
When the third delivery catheter 8 is used for delivery, the second protective sheath 7 extends into the third delivery catheter 8 and is moved toward the lesion site by the guidance of the third delivery catheter 8.
Specifically, when the third delivery catheter 8 is used for delivery, the method comprises the following steps:
First, the proximal ends of the first protective sheath 2, the pushing device 1 and the second protective sheath 7 are relatively fixed by the first fixing device 6 and the second fixing device 9.
The distal end of the second protective sheath 7 is then inserted into the third delivery catheter 8 and extended into the lesion site of the human body along the third delivery catheter 8.
When the distal end of the second protecting sheath 7 reaches the focus position of the human body, the pushing device 1 and the first fixing device 6 at the proximal end of the first protecting sheath 2 are released, and the embolism 3 is conveyed to the focus position of the human body from the distal end of the first protecting sheath 2 through the pushing device 1.
As shown in fig. 11, in the embolic delivery system provided in this embodiment, a second fixing device 9 is disposed between the proximal end of the second protecting sheath 7 and the first protecting sheath 2. The second fixing device 9 is used for relatively fixing the first protective sheath 2 and the second protective sheath 7, so that the first protective sheath 2 and the second protective sheath 7 can not move in the process of being conveyed in the conveying catheter together. The second fixing device 9 and the first fixing device 6 may have the same structure, and will not be described herein.
With the above arrangement, when the second protective sheath 7 is extended into the focus position of the human body along the delivery catheter, if the distal end of the second protective sheath 7 cannot reach the focus position of the human body after the second protective sheath 7 is fully extended into the delivery catheter, the second fixing device 9 at the proximal ends of the first protective sheath 2 and the second protective sheath 7 can be released first, and the second protective sheath 2 can be extended into the focus position of the human body along the delivery catheter. When the distal end of the first protecting sheath 2 reaches the focus position of the human body, the first fixing device 6 at the proximal ends of the pushing device 1 and the first protecting sheath 2 is released, and the embolism 3 is conveyed to the focus position of the human body from the distal end of the first protecting sheath 2 through the pushing device 1.
The uses of the first, second, and third transfer catheters 4, 5, and 8 in the present embodiment are not particularly limited, and may be micro catheters or the like.
In addition, in this embodiment, the second protective sheath 7 may have a developing property, and specific implementation manners include, but are not limited to, adding a developing material into polymer material particles, thereby developing the whole body after molding, wherein the developing material includes barium sulfate, bismuth oxide, tungsten powder, etc., or forging a developing ring at a position of 0-2cm, for example, at a head end of the second protective sheath 7, wherein the developing ring is made of a material with a developing property such as Pt/Ir, etc., or heat shrinking a heat shrinking tube with a section of the developing material added at a position of 0-2cm, for example, at the head end of the second protective sheath 7.
In this embodiment, the second protective sheath 7 meets the requirements of low friction coefficient, over-bending performance and supporting performance, and the implementation manner meeting the requirements includes, but is not limited to, ① using a polymer material with a low friction coefficient and good supporting performance, such as PTFE, HDPE, POM, and the like, performing stretching reducing treatment on the head end of the second protective sheath so as to enable the second protective sheath to have good passing performance, ② using a polymer material with a good over-bending performance and a certain supporting performance, such as Pebax, nylon, and the like, adding lubricating particles into the polymer material so as to enable the friction coefficient of the second protective sheath to be reduced, or splicing the ① and ② polymer materials, namely a ① material at the distal end and a ② material at the proximal end, and connecting and fixing the second protective sheath by using a mode such as thermal welding, laser welding, resistance welding, and the like.
The embolic delivery system provided in this embodiment achieves the purpose that one embolic 3 can be compatible with multiple delivery catheters simultaneously, and can greatly reduce the time and cost for a doctor to exchange delivery catheters.
In addition, in the above embodiment, the distal end refers to an end far from the operator, and the proximal end refers to an end near the operator.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (12)
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| CN202311814464.1A CN117814866B (en) | 2023-12-26 | 2023-12-26 | An embolic delivery system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102871700A (en) * | 2012-10-09 | 2013-01-16 | 加奇生物科技(上海)有限公司 | Braided part system for embolizing aneurysm |
| CN211409226U (en) * | 2019-12-19 | 2020-09-04 | 北京泰杰伟业科技有限公司 | Leading-in sheath pipe of embolism spring coil |
| CN221730735U (en) * | 2023-12-26 | 2024-09-20 | 健源医疗科技(无锡)有限公司 | Embolic delivery system |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2520233B1 (en) * | 2009-04-02 | 2017-11-01 | Endoshape, Inc. | Vascular occlusion devices |
| WO2010123821A1 (en) * | 2009-04-20 | 2010-10-28 | Achieva Medical Limited | Delivery assembly for occlusion device using mechanical interlocking coupling mechanism |
| CN102764165B (en) * | 2012-08-13 | 2015-01-07 | 宁波健世生物科技有限公司 | Percutaneous aorta or aorta valve stent conveying system |
| WO2022014632A1 (en) * | 2020-07-16 | 2022-01-20 | テルモ株式会社 | Medical instrument set, delivery system, and embolus delivery medical system |
| CN115337074A (en) * | 2021-05-14 | 2022-11-15 | 复旦大学 | A thrombectomy device for pulmonary embolism with blood flow conduction function |
| CN113749816A (en) * | 2021-09-01 | 2021-12-07 | 上海竞捷医疗科技有限公司 | Delivery device and prosthesis system |
| CN115645126A (en) * | 2022-07-04 | 2023-01-31 | 巴特勒生物科技(苏州)有限公司 | Cerebrovascular stent leading-in device |
| CN219109864U (en) * | 2022-12-23 | 2023-06-02 | 微创神通医疗科技（上海）有限公司 | Introducer sheath and interventional system |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102871700A (en) * | 2012-10-09 | 2013-01-16 | 加奇生物科技(上海)有限公司 | Braided part system for embolizing aneurysm |
| CN211409226U (en) * | 2019-12-19 | 2020-09-04 | 北京泰杰伟业科技有限公司 | Leading-in sheath pipe of embolism spring coil |
| CN221730735U (en) * | 2023-12-26 | 2024-09-20 | 健源医疗科技(无锡)有限公司 | Embolic delivery system |
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