CN116712140A - Cutting and collecting catheter and intravascular calcified plaque removing device - Google Patents
Cutting and collecting catheter and intravascular calcified plaque removing device Download PDFInfo
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- CN116712140A CN116712140A CN202311008633.2A CN202311008633A CN116712140A CN 116712140 A CN116712140 A CN 116712140A CN 202311008633 A CN202311008633 A CN 202311008633A CN 116712140 A CN116712140 A CN 116712140A
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- Prior art keywords
- cutting
- catheter
- collecting
- calcified plaque
- tube
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- 238000005520 cutting process Methods 0.000 title claims abstract description 141
- 210000004204 blood vessel Anatomy 0.000 claims abstract description 29
- 238000003306 harvesting Methods 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 238000003475 lamination Methods 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- 239000011780 sodium chloride Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000012528 membrane Substances 0.000 claims 2
- 239000012634 fragment Substances 0.000 abstract description 9
- 239000002775 capsule Substances 0.000 description 17
- 230000003902 lesion Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 239000002504 physiological saline solution Substances 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000003698 laser cutting Methods 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 230000002308 calcification Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 229910001000 nickel titanium Inorganic materials 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 208000005189 Embolism Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 229910000566 Platinum-iridium alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 230000036770 blood supply Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 208000028867 ischemia Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical class [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000003229 sclerosing agent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320758—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions with a rotating cutting instrument, e.g. motor driven
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B17/320783—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions through side-hole, e.g. sliding or rotating cutter inside catheter
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3205—Excision instruments
- A61B17/3207—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions
- A61B2017/320741—Atherectomy devices working by cutting or abrading; Similar devices specially adapted for non-vascular obstructions for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy
Abstract
The invention discloses a cutting and collecting catheter and an intravascular calcified plaque removing device, and relates to the technical field of medical instruments. The cutting and collecting catheter comprises a tube body, a cutting member and a supporting member; the tube body is provided with a notch which is suitable for covering the calcified plaque in the blood vessel; the cutting component is rotatably arranged in the tube body and positioned at the notch, and is used for rotatably cutting the calcified plaque in the blood vessel; the support member is provided on the body and is disposed opposite the notch and adapted to abut against the vessel wall so that the notch maintains a state of covering the calcified plaque when cutting. The invention provides a cutting and collecting catheter and an intravascular calcified plaque removing device, which can effectively remove intravascular calcified plaque, collect more calcified plaque fragments and reduce the cutting risk of blood vessels.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a cutting and collecting catheter and an intravascular calcified plaque removing device.
Background
Calcified plaque is a substance harmful to human body caused by fat, thrombus, hoof tissue and calcium carbonate deposited on the inner wall of a blood vessel, the existence of the calcified plaque can lead to the stenosis of the lumen of the blood vessel and unsmooth blood flow, and when serious, the calcified plaque can lead to insufficient blood supply of an organ, the plaque is broken and even blocks the blood vessel, and the acute ischemia phenomenon of the organ of a patient is caused. Therefore, it is necessary to remove calcified plaque in blood vessels.
The catheter of the existing calcified plaque removing device comprises a catheter body and a cutter arranged in the catheter body, wherein the cutter is connected with a motor and is driven by the motor to rotationally cut calcified plaque in a human blood vessel. However, the catheter of this calcified plaque removal apparatus generates fragments during the process of cutting off calcified plaque, and the calcified plaque fragments remain in the blood vessel without any treatment, and may form embolism and cause damage.
Disclosure of Invention
The main object of the present invention is to provide a cutting and collecting catheter and an intravascular calcified plaque removal apparatus aimed at achieving effective removal of intravascular calcified plaque and collecting as much calcified plaque fragments as possible.
To achieve the above object, the present invention proposes a cutting and collecting catheter comprising:
a tube body provided with a notch suitable for covering the calcified plaque in the blood vessel;
a cutting member rotatably disposed within the body at the notch, the cutting member for rotatably cutting an intravascular calcified plaque; and
and a support member provided on the tube body, facing away from the notch, and adapted to abut against a wall of a blood vessel so that the notch maintains a state of covering a calcified plaque when cutting.
Optionally, the support member comprises at least one balloon, the input end of the balloon being adapted for injection of physiological saline.
Optionally, the cutting and collecting catheter further comprises a conveying pipe, the conveying pipe is connected with the pipe body, the conveying pipe is provided with a first cavity channel, a second cavity channel and a third cavity channel, the first cavity channel is suitable for being used for being connected with the cutting component to pass through a transmission shaft, the second cavity channel is suitable for being used for a guide wire to pass through, one end of the third cavity channel is communicated with the input end of the capsule body, the other end of the third cavity channel is communicated with a pressure pump, and the pressure pump is used for injecting physiological saline into the capsule body through the third cavity channel.
Optionally, the pressure pump is a syringe, the syringe is provided with a display device and a connector, the display device is used for displaying pressure information, and the connector is communicated with the conveying pipe.
Optionally, the conveying pipe comprises a spiral torsion pipe, a leakage-proof film and a metal woven net, and the spiral torsion pipe, the leakage-proof film and the metal woven net are encapsulated by lamination heat shrinkage or injection molding to form the catheter main body.
Optionally, the cutting component comprises a cutter holder and a cutter head, the cutter holder is suitable for being in driving connection with the driving component through a transmission shaft, a convex column is arranged on the cutter holder, a mounting hole matched with the convex column is arranged on the cutter head at a position corresponding to the convex column, and the convex column is inserted into the mounting hole and fixed through welding or bonding; or alternatively
The cutting part comprises a cutter body and a plurality of cutting edges arranged on the periphery of the cutter body, wherein a collecting groove for collecting calcified spots is formed between two adjacent cutting edges, or a collecting channel which is arranged along the length direction of the cutter body and used for collecting calcified spots is formed in the cutter body.
Optionally, the cutting and collecting catheter further comprises a collecting member integrally formed with or provided in the tube body, the collecting member being for collecting resected calcified plaque.
Optionally, the collecting component is a spiral tube, a spring tube or a hollowed metal tube.
Optionally, the cutting and collecting catheter further comprises a tip disposed at the distal end of the tube body, the tip being tapered;
the tip is provided with a guide wire cavity channel for a guide wire to pass through, a developing piece is arranged in the guide wire cavity channel and is used for developing under the detection of an imaging device so as to mark the position of the tip after the cutting and collecting catheter enters a human body.
In order to achieve the above object, the present invention also provides an intravascular calcified plaque removal apparatus comprising:
a drive assembly; and
a cutting and harvesting catheter as described above in driving connection with said drive assembly for driving rotation of a cutting member of said cutting and harvesting catheter to cut an endovascular calcified plaque; the cutting and harvesting catheter comprises:
a tube body provided with a notch suitable for covering the calcified plaque in the blood vessel;
a cutting member rotatably disposed within the body at the notch, the cutting member for rotatably cutting an intravascular calcified plaque; and
and a support member provided on the tube body, facing away from the notch, and adapted to abut against a wall of a blood vessel so that the notch maintains a state of covering a calcified plaque when cutting.
In the technical scheme of the invention, the cutting and collecting catheter comprises a tube body, a cutting component and a supporting component; the tube body is provided with a notch which is suitable for covering the calcified plaque in the blood vessel; the cutting component is rotatably arranged in the tube body and positioned at the notch, and is used for rotatably cutting the calcified plaque in the blood vessel; the support member is provided on the body and is disposed opposite the notch and adapted to abut against the vessel wall so that the notch maintains a state of covering the calcified plaque when cutting. In this way, it is ensured that the tube is able to cover the calcified plaque all the time during the cutting process, so that all the fragments of calcified plaque are collected as much as possible.
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 required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the structure of an embodiment of an intravascular calcified plaque removal apparatus according to the present invention;
FIG. 2 is a schematic view of one embodiment of a cutting and collecting catheter of the present invention;
FIG. 3 is a schematic view of a calcification spot removal of one embodiment of a cutting and collecting catheter of the present invention;
FIG. 4 is a schematic view of a calcification spot removal of another embodiment of a cutting and collecting catheter of the present invention;
FIG. 5 is a schematic view of the structure of the support member of one embodiment of the cutting and collecting catheter of the present invention;
FIG. 6 is a cross-sectional view of a delivery tube in one embodiment of a cutting and collecting catheter of the present invention;
FIG. 7 is a schematic view of the cutting member of the first embodiment of the cutting and collecting catheter of the present invention;
FIG. 8 is an exploded view of the cutting member of the first embodiment of the cutting and collecting catheter of the present invention;
FIG. 9 is a schematic view of the cutting member of a second embodiment of the cutting and collecting catheter of the present invention;
FIG. 10 is a block diagram of the end face of the cutting element of the second embodiment of the cutting and collecting catheter of the present invention;
FIG. 11 is a schematic view of the cutting member of a third embodiment of the cutting and collecting catheter of the present invention;
FIG. 12 is a block diagram of the end face of the cutting element of the third embodiment of the cutting and collecting catheter of the present invention;
FIG. 13 is a schematic view showing the structure of a cutting member in a fourth embodiment of the cutting and collecting catheter of the present invention;
fig. 14 is a view showing an end face construction of a cutting member in a fourth embodiment of the cutting and collecting catheter according to the present invention.
Reference numerals illustrate:
10. a tube body; 20. a cutting member; 30. a support member; 40. a delivery tube; 50. a pressure pump; 60. a tip; 70. a collecting member; 10a, notch; 31. a bladder; 40a, a first channel; 40b, a second channel; 40c, a third channel; 211. a tool apron; 212. a cutter head; 213. a transmission shaft; 221. a blade body; 222. a blade; 22a, a collection tank; 22b, a collection channel; 2111. a convex column; 212a, mounting holes; 60a, guidewire lumen; 601. a developing member; 100. cutting and collecting the catheter; 200. a drive assembly; 101. a blood vessel; 102. calcified plaque.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B meet at the same time. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The present invention provides a cutting and harvesting catheter that may be adapted for use with an intravascular calcified plaque removal device or other sclerosant removal device, as not limited herein.
Referring to fig. 1 to 5, in an embodiment of the present invention, the cutting and collecting catheter 100 is applied to an intravascular calcified plaque removal device, and the cutting and collecting catheter 100 is drivingly connected to a drive assembly 200 through a drive shaft 213. The cutting and collecting catheter 100 includes a tube body 10, a cutting member 20, and a supporting member 30; the tube body 10 is provided with a notch 10a adapted to cover the calcified plaque 102 inside the blood vessel 101; the cutting member 20 is rotatably disposed in the tube body 10 at the notch 10a, and the cutting member 20 is used for rotatably cutting the calcified plaque 102 in the blood vessel 101; the support member 30 is provided on the tube body 10 and is disposed opposite to the notch 10a and adapted to abut against the wall of the blood vessel 101 so that the notch 10a is kept in a state of covering the calcified plaque 102 when cutting.
It should be noted that, as for the collecting function of the cutting and collecting catheter 100, as shown in fig. 9 to 14, the cutting member 20 having a certain capability of collecting calcified plaque fragments may be used, or the collecting member 70 may be disposed at the front end of the tube body 10 to collect calcified plaque fragments, as shown in fig. 2, which will not be described herein.
In this embodiment, the tube body 10 may be made of a medical polymer material, which is not particularly limited.
In this embodiment, the notch 10a may be formed by the flexible tube 10 itself, or may be formed by a separate component formed by laser cutting and the like and assembled on the tube 10, and the component may be made of a hard material such as metal to maintain a fixed shape, thereby improving the effect of covering calcified spots. Specifically, the notch 10a of the tube body 10 may be cut by a laser cutting machine from a stainless steel tube or a nickel-titanium alloy tube, and the position of the notch 10a is the embedding position of the calcified plaque 102 during the operation.
The cutting member 20 may be a rotary cutting tool, and the specific structure is not limited herein.
The supporting member 30 may be an inflatable bladder such as an air bag, and may be made of a polymer film material, and is attached to the back of the notch 10a of the tube body 10 in a normal state, so that the volume is small, and in a working state, the bladder 31 may expand to a target size under the action of pressure so as to support the back of the notch 10a, so that the notch 10a covers the calcified plaque 102 to be resected, thereby achieving the wall attaching effect.
It will be appreciated that the present invention effectively ensures that the tube 10 is able to cover the calcified plaque 102 at all times during the cutting process, so as to collect as many fragments of calcified plaque as possible, by providing the notch 10a on the tube 10 for covering the calcified plaque 102 within the vessel 101, and providing the support member 30 on the tube 10 opposite the notch 10a and adapted to abut the wall of the vessel 101, so that the notch 10a remains covered with the calcified plaque 102 during the cutting process.
To further enhance the stability of the shape maintenance of the notch 10a, referring mainly to fig. 5, in one embodiment, the support member 30 may include at least one capsule 31, and the input end of the capsule 31 is adapted to be filled with physiological saline.
In this embodiment, the number of the capsules 31 may be single, two or more; wherein, the single capsule 31 has the advantage of being able to increase the diameter range of the whole catheter, making the catheter larger in diameter; the advantage of the double capsule 31 is that the plane formed by the highest point of the double capsule 31 is more stable against the back of the notch 10a where the cutting member 20 is located, and is not easy to roll over.
Referring to fig. 1, 2 and 6, in an embodiment, the cutting and collecting catheter 100 may further include a delivery tube 40, wherein the delivery tube 40 is connected to the tube body 10, the delivery tube 40 is formed with a first channel 40a, a second channel 40b and a third channel 40c, the first channel 40a is suitable for passing a transmission shaft 213 connected to the cutting member 20, the second channel 40b is suitable for passing a guide wire, one end of the third channel 40c is connected to an input end of the capsule body 31, the other end of the third channel 40c is connected to a pressure pump 50 through a connection pipe, and the pressure pump 50 is used for injecting physiological saline into the capsule body 31 through the third channel 40 c.
In this embodiment, the delivery tube 40 functions primarily to deliver the distal cutting and collection catheter 100 to the target lesion. The conveying pipe 40 is a multi-cavity pipe, and three cavities are a transmission shaft cavity, a guide wire cavity and a filling cavity respectively; the drive shaft cavity primarily provides a drive path for the drive shaft 213; the guide wire cavity is mainly used for providing a cavity channel for guide wires to pass through, and if the guide wire cavity is used for rapid exchange type guide wire cavity, the cavity does not penetrate through the whole conveying pipe 40 and needs to be separated from a designated position of the conveying pipe 40; the filling chamber mainly provides filling channels for the capsule 31.
The delivery tube 40 may also include other conventional components such as a screw torsion tube, a metal woven mesh, a leak-proof film, etc. that provide a skeleton for the delivery tube 40, and the delivery tube 40 may be formed by a process such as lamination heat shrinkage or injection molding encapsulation of a polymeric material. The leak-proof film may be made of PTFE, but is not limited thereto.
Referring to fig. 1, in this embodiment, the pressure pump 50 may be a syringe provided with a display device for displaying pressure information and a connector in communication with the delivery tube 40. Wherein the connection may be a three-way connection for connecting the liquid supply and the delivery tube 40.
The pressure pump 50 mainly provides pressure for the capsule body 31 through the filling cavity of the conveying pipe 40, so that the capsule body 31 is expanded, the volume is increased, and the wall attaching effect is achieved.
Referring to fig. 2-4, in one embodiment, the cutting and collecting catheter 100 further includes a collecting member 70, the collecting member 70 being integrally formed with the tube body 10 or disposed within the tube body 10, the collecting member 70 being configured to collect resected calcified plaque.
In this embodiment, the collecting member 70 may be a spiral tube, a spring tube, or a hollow metal tube. The metal tube can be made of stainless steel or nickel-titanium alloy, and can be cut into a hollow tubular structure by a laser cutting machine, so that the rigidity is reduced, the flexibility is increased, the trafficability of the bent blood vessel 101 is improved, and the damage to the blood vessel 101 is reduced.
Referring mainly to fig. 7 and 8, in the first embodiment, the cutting member 20 may include a cutter holder 211 and a cutter head 212, where the cutter holder 211 is adapted to be in driving connection with the driving assembly 200 through a transmission shaft 213, a boss 2111 is provided on the cutter holder 211, a mounting hole 212a adapted to the boss 2111 is provided on the cutter head 212 corresponding to the boss 2111, and the boss 2111 is inserted into the mounting hole 212a and fixed by welding or bonding.
In this embodiment, as shown in fig. 6, the protruding column 2111 may be configured as a flat square column, and the corresponding mounting hole 212a may be configured as a square hole, so that the tool post 211 and the tool bit 212 are assembled into a whole through the cooperation of the square column and the square hole and through welding or bonding, etc., so that the torsional strength of the tool bit 212 in the rotation process of the cutting member 20 can be effectively improved, and the tool bit 212 is not easy to fall off.
Further, referring to fig. 7, the blade of the blade 212 may be deflected toward the axis by an angle α such that the blade of the blade 212 is parallel to the body vessel 101 wall and the collecting bag. Optionally, the blade of the tool bit 212 may be offset 0-60 ° from the axis. Therefore, when the cutter head 212 is in the working state, the blade part of the cutter head 212 is in parallel with the wall of the blood vessel 101 and the collecting bag theoretically, and the risk of cutting through the blood vessel 101 can be effectively reduced.
In this embodiment, the blade 212 may be formed of tungsten steel or cemented carbide material for cutting the calcified plaque 102. The transmission shaft 213 connected to the cutting member 20 may be a torsion shaft manufactured by a braiding or winding process, and the required torsion transmission ratio may be 1:1, which is not limited thereto.
In operation, as shown in fig. 1 and 3, the catheter is pushed to the target lesion site in the blood vessel 101 by the guide wire, and then physiological saline is injected into the capsule body 31 by the pressure pump 50, so that the volume of the capsule body 31 is increased, the notch 10a achieves the adherence effect, at this time, calcified plaque 102 of the lesion is embedded into the notch 10a, the driving component 200 of the removing device is started, the driving component 200 is controlled to make the driving shaft 213 perform linear motion and rotational motion, so that the cutting component 20 is driven to rotate and push forward until the cutting component 20 is pushed to pass through the target lesion site of the blood vessel 101, the calcified plaque 102 embedded into the notch 10a is removed, and pushed into the collecting component 70, and one-time cutting is completed, if one-time cutting is not completed, multiple times of cutting can be performed at the position. If it is desired to ablate plaque elsewhere in vessel 101, the saline is pumped through pressure pump 50 into balloon 31, the pressure in balloon 31 is relieved, and the catheter is withdrawn. Then pushing the catheter to another target lesion site through the guide wire for continuous cutting.
In addition, in the second, third and fourth embodiments, referring to fig. 9 to 14, the cutting member 20 may include a blade 221 and a plurality of blades 222 provided at the outer circumference of the blade 221, a collecting groove 22a for collecting calcified spots is formed between adjacent blades 222, or a collecting channel 22b for collecting calcified spots is formed inside the blade 221 along the length direction thereof.
In operation, as shown in fig. 1 and 4, the catheter is pushed to the target lesion site in the blood vessel 101 by the guide wire, physiological saline is injected into the capsule body 31 by the pressure pump 50, so that the volume of the capsule body 31 is increased, the notch 10a achieves the adherence effect, at this time, calcified plaque 102 of the lesion is embedded into the notch 10a, the driving component 200 of the removing device is started, the driving component 200 is controlled to make the transmission shaft 213 perform a rotary motion, so that the cutting component 20 is driven to rotate, the calcified plaque 102 embedded into the notch 10a is removed by the rotation of the cutting component 20, and the collecting groove 22a or the collecting channel 22b of the cutting component 20 is collected, so that cutting is completed, if not completely cut in a short time, the cutting time can be enlarged at the position until completely cut is completely removed. If it is desired to ablate plaque elsewhere in vessel 101, the saline is pumped through pressure pump 50 into balloon 31, the pressure in balloon 31 is relieved, and the catheter is withdrawn. The catheter is then delivered over the guidewire to another target lesion for continued cutting.
To facilitate insertion of the catheter into the vessel 101 and to reduce trauma to the vessel 101, referring primarily to FIG. 2, in one embodiment the cutting and harvesting catheter 100 further comprises a tip 60 disposed at the distal end of the body 10, the tip 60 being tapered; the tip 60 is provided with a guide wire cavity 60a for the guide wire to pass through, and a developing member 601 is arranged in the guide wire cavity 60a, and the developing member 601 is used for developing under the detection of an imaging device so as to mark the position of the tip 60 after the cutting and collecting catheter 100 enters the human body.
In the present embodiment, the material of the developing member 601 may be platinum iridium alloy or tantalum, and the material is not limited herein.
Furthermore, in some embodiments, the tip 60 may include a support, a connector, and the developer 601 described above that are heat shrunk or over-molded together by lamination of a polymeric material and form the body of the tip 60, the support being coupled to the collection member 70, and the connector being embedded in the body of the tip 60.
The connecting piece can increase the connection strength of the polymer material and the supporting piece after lamination heat shrinkage or encapsulation injection molding, and the connecting piece can be a spring or a part with irregular surface, so that the connection strength of the polymer material and the supporting piece is increased. The support member and collection member 70 may be joined by welding, mechanical clamping, bonding, lamination heat shrink, and the like.
The present invention also proposes an endovascular calcified plaque removal apparatus, referring to fig. 1, comprising a cutting and collecting catheter 100, the specific structure of which cutting and collecting catheter 100 refers to the above-described embodiment, since the endovascular calcified plaque removal apparatus proposed by the present invention comprises all aspects of all embodiments of the cutting and collecting catheter 100 described above, and therefore has at least the same technical effects as the cutting and collecting catheter 100 described above, which are not described herein.
Referring primarily to fig. 1-4, in one embodiment of the present invention, the intravascular calcified plaque removal device includes a cutting and collection catheter 100 and a drive assembly 200; the cutting and harvesting catheter 100 is drivingly connected to a drive assembly 200 via a drive shaft 213, the drive assembly 200 being adapted to drive rotation of the cutting member 20 of the cutting and harvesting catheter 100 to cut calcified plaque 102 within the blood vessel 101.
In this embodiment, the driving assembly 200 may include a motor, a battery, a circuit, a switch, a housing, and the like, where the battery provides power for the motor, and in combination with fig. 1 and 2, an output shaft of the motor is fixedly connected to a transmission shaft 213 connected to the cutting member 20, so that rotation of the motor is transmitted to the cutting member 20 through the transmission shaft 213, thereby realizing rotation of the cutting member 20.
In addition, the body 10 and delivery tube 40 of the distally located cutting and harvesting catheter 100 may be hydrophilically coated to enhance the passage of the catheter within the vessel 101.
Under normal use conditions, the removal device is inserted through a human designated vessel 101, and the catheter is pushed to the target lesion vessel 101 of the patient under the pushing of the guide wire through the vessel 101 system. Specifically, the notch 10a of the catheter is sent to the target lesion site, physiological saline is injected through the pressure pump 50, the pressure pump 50 fills the balloon 31 through the filling cavity of the delivery tube 40, the balloon 31 is inflated, the volume is increased, so as to achieve a better adherence effect, at this time, calcified plaque 102 of the lesion is embedded into the notch 10a, then the driving assembly 200 is restarted, the calcified plaque 102 is resected by controlling the movement of the cutting member 20, and in the process of cutting, the collecting member 70 and/or the cutting member 20 collect the resected calcified plaque fragments.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. A cutting and harvesting catheter, comprising:
a tube body provided with a notch suitable for covering the calcified plaque in the blood vessel;
a cutting member rotatably disposed within the body at the notch, the cutting member for rotatably cutting an intravascular calcified plaque; and
and a support member provided on the tube body, facing away from the notch, and adapted to abut against a wall of a blood vessel so that the notch maintains a state of covering a calcified plaque when cutting.
2. The cutting and harvesting catheter of claim 1, wherein the support member comprises at least one balloon, the input end of the balloon being adapted for injection of saline.
3. The cutting and collecting catheter of claim 2, further comprising a delivery tube connected to the tube body, the delivery tube defining a first lumen adapted for passage of a drive shaft connected to the cutting member, a second lumen adapted for passage of a guidewire, and a third lumen having one end in communication with the input end of the balloon body and another end in communication with a pressure pump for injecting saline into the balloon body through the third lumen.
4. A cutting and collecting catheter according to claim 3, wherein the pressure pump is a syringe provided with a display device for displaying pressure information and a connector communicating with the delivery tube.
5. The cutting and collecting catheter of claim 3, wherein the delivery tube comprises a spiral torsion tube, a leak-proof membrane, and a metal braid, the spiral torsion tube, leak-proof membrane, and metal braid being encapsulated by lamination heat shrink or injection molding to form a catheter body.
6. The cutting and collecting catheter according to claim 1, wherein the cutting member comprises a cutter holder and a cutter head, the cutter holder is suitable for being in driving connection with a driving assembly through a transmission shaft, a convex column is arranged on the cutter holder, a mounting hole matched with the convex column is arranged on the cutter head at a position corresponding to the convex column, and the convex column is inserted into the mounting hole and fixed through welding or bonding; or alternatively
The cutting part comprises a cutter body and a plurality of cutting edges arranged on the periphery of the cutter body, wherein a collecting groove for collecting calcified spots is formed between two adjacent cutting edges, or a collecting channel which is arranged along the length direction of the cutter body and used for collecting calcified spots is formed in the cutter body.
7. The cutting and harvesting catheter of claim 3, further comprising a harvesting component integrally formed with or disposed within the body, the harvesting component configured to harvest resected calcified plaque.
8. The cutting and collecting catheter of claim 7, wherein the collecting member is a coiled tube, a spring tube, or a hollowed out metal tube.
9. The cutting and collection catheter of claim 1, further comprising a tip disposed at a distal end of the tube body, the tip being tapered;
the tip is provided with a guide wire cavity channel for a guide wire to pass through, a developing piece is arranged in the guide wire cavity channel and is used for developing under the detection of an imaging device so as to mark the position of the tip after the cutting and collecting catheter enters a human body.
10. An intravascular calcified plaque removal apparatus comprising:
a drive assembly; and
the cutting and harvesting catheter of any one of claims 1-9, drivingly connected to the drive assembly, the drive assembly for driving rotation of the cutting member of the cutting and harvesting catheter to cut intravascular calcified plaque.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311008633.2A CN116712140A (en) | 2023-08-10 | 2023-08-10 | Cutting and collecting catheter and intravascular calcified plaque removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311008633.2A CN116712140A (en) | 2023-08-10 | 2023-08-10 | Cutting and collecting catheter and intravascular calcified plaque removing device |
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| CN116712140A true CN116712140A (en) | 2023-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311008633.2A Pending CN116712140A (en) | 2023-08-10 | 2023-08-10 | Cutting and collecting catheter and intravascular calcified plaque removing device |
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|---|---|---|---|---|
| US4979951A (en) * | 1984-05-30 | 1990-12-25 | Simpson John B | Atherectomy device and method |
| US5250059A (en) * | 1992-01-22 | 1993-10-05 | Devices For Vascular Intervention, Inc. | Atherectomy catheter having flexible nose cone |
| US20100049225A1 (en) * | 2007-10-22 | 2010-02-25 | Atheromed, Inc. | Atherectomy devices and methods |
| CN114642477A (en) * | 2022-02-25 | 2022-06-21 | 广东博迈医疗科技股份有限公司 | Blood vessel calcified plaque cutting device |
| CN116370023A (en) * | 2022-12-19 | 2023-07-04 | 上海市东方医院（同济大学附属东方医院） | Calcified plaque excision device |
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2023
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4979951A (en) * | 1984-05-30 | 1990-12-25 | Simpson John B | Atherectomy device and method |
| US5250059A (en) * | 1992-01-22 | 1993-10-05 | Devices For Vascular Intervention, Inc. | Atherectomy catheter having flexible nose cone |
| US20100049225A1 (en) * | 2007-10-22 | 2010-02-25 | Atheromed, Inc. | Atherectomy devices and methods |
| CN114642477A (en) * | 2022-02-25 | 2022-06-21 | 广东博迈医疗科技股份有限公司 | Blood vessel calcified plaque cutting device |
| CN116370023A (en) * | 2022-12-19 | 2023-07-04 | 上海市东方医院（同济大学附属东方医院） | Calcified plaque excision device |
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