CN219461323U - Intravascular cutting catheter system - Google Patents
Intravascular cutting catheter system Download PDFInfo
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- CN219461323U CN219461323U CN202320406468.5U CN202320406468U CN219461323U CN 219461323 U CN219461323 U CN 219461323U CN 202320406468 U CN202320406468 U CN 202320406468U CN 219461323 U CN219461323 U CN 219461323U
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Abstract
The utility model relates to an intravascular cutting catheter system, which comprises a first blocking balloon catheter assembly, a cutting catheter assembly and a second blocking balloon catheter assembly, wherein the first blocking balloon catheter assembly comprises a first blocking balloon, the second blocking balloon catheter assembly comprises a second blocking balloon, the cutting catheter assembly comprises a cutter with a radial contraction state and a radial expansion state, when the cutter is positioned between the first blocking balloon and the second blocking balloon, the first blocking balloon and the second blocking balloon are in a bulge state, and when the cutter is converted from the radial contraction state to the radial expansion state; and/or the cutter in the radial expansion state cuts the plaque of the intravascular lesions when moving along the axial direction or rotating around the axial direction. The intravascular incision catheter system can adjust the blocking distance according to the condition of lesion plaques of patients, precisely control the cutting range of the cutter and efficiently cut the lesion plaques in the blood vessels.
Description
Technical Field
The utility model belongs to the technical field of medical appliances, and particularly relates to an intravascular cutting catheter system.
Background
In the cutting process of the lesion and blockage tissue on the inner wall of a blood vessel, the conventional cutting and blocking balloon is easy to cause plaque fragments to leave the lesion position, but the plaque fragments are not brought into the blood circulation by a human body, and especially the hardened plaque fragments are very easy to cause blockage of other parts of the blood vessel or other blood vessels along with the blood flow. At present, related reports of two-end plugging saccule systems exist, and although risks of plaque fragments entering a blood circulation system can be reduced to a certain extent, the vascular plugging distance cannot be adjusted at any time according to a lesion part, accurate adjustment of a cutting position is difficult to achieve, and cutting efficiency is required to be improved.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an intravascular cutting catheter system with adjustable effective blocking distance and capable of realizing accurate and efficient cutting of vascular lesion plaques.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an intravascular cutting catheter system, comprising: a first occlusion balloon catheter assembly, a cutting catheter assembly, and a second occlusion balloon catheter assembly.
The first plugging saccule catheter assembly comprises a first catheter and a first plugging saccule, the first catheter is provided with a first cavity channel for a guide wire to pass through and a second cavity channel for gas or liquid to pass through, the first cavity channel and the second cavity channel extend along the axial direction of the first catheter respectively, the first plugging saccule is fixedly sleeved on the periphery of the far end of the first catheter, and the inside of the first plugging saccule is communicated with the second cavity channel.
The cutting catheter assembly comprises a second catheter, a third catheter and a cutter, wherein the second catheter is provided with a third cavity which is used for the first plugging balloon assembly to pass through and extends along the axial direction of the second catheter, the third catheter is slidably sleeved on the periphery of the second catheter, the distal end of the second catheter extends out of the distal end of the third catheter, a fourth cavity used for sucking a cut lesion plaque is formed between the outer wall of the second catheter and the inner wall of the third catheter, the distal end of the cutter is fixedly connected with the distal end of the second catheter, the proximal end of the cutter is fixedly connected with the distal end of the third catheter, a notch is formed in the side wall of the cutter, the fourth cavity is communicated with the outside through the notch, the cutter is in a radial contracted state and a radial expanded state, the maximum outer diameter of the cutter in the radial expanded state is larger than the maximum outer diameter of the cutter in the radial contracted state, and the cutter is enabled to be in the radial contracted state and converted between the radial expanded state when the third catheter slides relative to the second catheter.
The second plugging balloon catheter assembly comprises a fourth catheter and a second plugging balloon, the fourth catheter is provided with a fifth cavity channel for the cutting catheter assembly to pass through and a sixth cavity channel for the gas or liquid to pass through, the fifth cavity channel and the sixth cavity channel extend along the axial direction of the fourth catheter respectively, the second plugging balloon is fixedly sleeved on the periphery of the distal end of the second catheter, and the interior of the second plugging balloon is communicated with the sixth cavity channel.
When the cutter is positioned between the first blocking balloon and the second blocking balloon, the first blocking balloon and the second blocking balloon are in a swelling state, and the cutter is converted from a radial contraction state to a radial expansion state; and/or the cutter in the radial expansion state cuts the intravascular lesion plaque when moving along the axial direction or rotating around the axial direction.
Preferably, the outer diameter of the cutter increases and then decreases from the proximal end to the distal end when the cutter is in the radially expanded state.
Preferably, the cutter comprises a plurality of cutting elements which are distributed at intervals along the circumferential direction of the second conduit, and the gap is arranged between two adjacent cutting elements.
According to some embodiments, the cutting element comprises a first portion and a second portion of equal length, the distal end of the first portion being fixedly connected to the distal end of the second catheter, the proximal end of the first portion being connected to the distal end of the second portion, the proximal end of the second portion being connected to the distal end of the third catheter, the first portion extending obliquely from the distal end to the proximal end in a direction away from the second catheter, and the second portion extending obliquely from the distal end to the proximal end in a direction closer to the second catheter when the cutter is in the radially expanded state.
Further preferably, the cutting catheter assembly further comprises an operating handle disposed between the proximal end of the second catheter and the proximal end of the third catheter, by which the third catheter is slid relative to the second catheter.
According to some embodiments, the operating handle comprises an operating handle body arranged at the proximal end of the third catheter, a pushing channel is formed in the operating handle body, the proximal end of the second catheter is located in the pushing channel, a threaded protrusion is arranged at the proximal end of the second catheter, a threaded groove matched with the threaded protrusion is arranged in the pushing channel, and the third catheter slides relative to the second catheter by rotating the operating handle body.
Still preferably, the operating handle body is further provided with a button accommodating cavity and a control button inserted in the button accommodating cavity, the central axis of the button accommodating cavity is perpendicular to the central axis of the pushing channel, the button accommodating cavity is communicated with the pushing channel, the lower end of the control button is provided with a thread groove matched with the thread protrusion, the control button has a pressing state and a pulling-out state, when the control button is in the pressing state, the lower end of the control button is matched and fixed with the thread protrusion, and when the control button is in the pulling-out state, the lower end of the control button is separated from the thread protrusion.
Preferably, the proximal end of the third catheter is further provided with a connecting seat, the connecting seat comprises a bearing assembly sleeved on the third catheter in a welding mode, a connecting portion arranged on the bearing assembly and used for connecting a pumping-off pipeline is formed on the connecting portion, and the pumping-off channel is communicated with the fourth cavity.
Preferably, the proximal end of the first catheter is provided with a first catheter seat, the first catheter seat is provided with a first main channel and a first branch channel, the proximal ends of the first main channel and the first branch channel are respectively communicated with the outside, the distal end of the first main channel is communicated with the proximal end of the first cavity channel, the first main channel is coaxial with the first cavity channel, and the distal end of the first branch channel is communicated with the second cavity channel.
Preferably, the proximal end of the second catheter is provided with a second catheter seat, the second catheter seat is provided with a second main channel and a second branch channel, the proximal ends of the second main channel and the second branch channel are respectively communicated with the outside, the distal end of the second main channel is communicated with the proximal end of the fifth channel, the second main channel is coaxial with the fifth channel, and the distal end of the second branch channel is communicated with the sixth channel.
Preferably, the first blocking balloon and the second blocking balloon are compliant blocking balloons with compliance not less than 20%, so that the first blocking balloon and the second blocking balloon are attached to the inner wall of a blood vessel to block blood after being inflated. The first blocking balloon and the second blocking balloon respectively have an expansion state and a contraction state, the first blocking balloon and the second blocking balloon are pressurized and expanded by introducing gas or liquid into the first blocking balloon and the second blocking balloon, and the radial dimension or contraction is reduced by sucking the liquid or the gas in the first blocking balloon and the second blocking balloon and decompressing the first blocking balloon and the second blocking balloon.
Preferably, when the first blocking balloon and the second blocking balloon are changed from the expanded state to the contracted state, the first blocking balloon and the second blocking balloon are respectively rotated around the axial direction to form a plurality of wound petals.
After two ends of the lesion position are blocked, the intravascular incision catheter system cuts lesion plaque tissues and is sucked and discharged out of a human body.
The cutter of the intravascular cutting catheter system can be folded and rotated, the unfolding distance of the cutter can be manually controlled, the clockwise and anticlockwise rotation direction of the cutter can be manually adjusted during cutting, the cutting speed of plaque tissues on the inner wall of a blood vessel can be manually adjusted, the intravascular cutting catheter system can enter into the blood vessel of a human body along a guide wire, after pathological tissues are cut, the pathological tissues are sucked into a fourth cavity by a suction device for absorbing pathological tissue fragments, the fragments leave the blood circulation of the human body, and then enter an external suction pipeline to leave the human body smoothly.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the intravascular incision catheter system can adjust the blocking distance according to the condition of lesion plaques of patients, precisely control the cutting range of the cutter and efficiently cut the intravascular lesion plaques, so that the lesion menstruation is effectively treated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view showing the structure of an intravascular catheter system according to an embodiment;
fig. 2 is a schematic structural view of a first occlusion balloon catheter assembly in an intravascular catheter system of an embodiment (the first occlusion balloon being in an expanded state);
fig. 3 is a schematic view showing the structure of the first occlusion balloon in the intravascular catheter system according to the embodiment in a contracted state;
FIG. 4 is a schematic view of the first occlusion balloon of FIG. 3 in a deflated state;
fig. 5 is a schematic structural view of a cutting catheter assembly (with the cutter in a radially expanded state) of the intravascular cutting catheter system of the embodiment;
FIG. 6 is a schematic view of the tool of FIG. 5;
FIG. 7 is a schematic view in partial cross-section of a cutting catheter assembly in an intravascular cutting catheter system of an embodiment (with the cutter in a radially contracted state);
fig. 8 is a schematic structural view of a second occlusion balloon catheter assembly of the intravascular catheter system of the embodiment (the second occlusion balloon being in an expanded state);
fig. 9 is a schematic structural view of a second occlusion balloon catheter assembly of the intravascular catheter system of the embodiment (the second occlusion balloon being in a contracted state);
FIG. 10 is a schematic view of the second occlusion balloon of FIG. 9 in a deflated state;
FIG. 11 is a schematic view showing the structure of the intravascular catheter system according to the embodiment when operated in a blood vessel;
FIG. 12 is a partial expanded view of FIG. 11;
in the above figures:
1. a first occlusion balloon catheter assembly; 11. a first conduit; 12. a first occlusion balloon; 13. a first catheter hub;
2. cutting the catheter assembly; 21. a second conduit; 22. a third conduit; 23. a cutter; 231. a cutting element; 2311. a first portion; 2312. a second portion; 232. a notch; 241. an operation handle body; 2411. advancing the channel; 242. a control button; 243. a bearing assembly; 244. a connection part; 2441. drawing out the channel;
3. a second occlusion balloon catheter assembly; 31. a fourth conduit; 32. a second occlusion balloon; 33. a second catheter hub;
4. a guide wire;
5. lesion plaque.
Detailed Description
Hereinafter, only certain exemplary embodiments are briefly described. As will be recognized by those of skill in the pertinent art, the described embodiments may be modified in numerous different ways without departing from the spirit or scope of the embodiments of the present utility model. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive.
In the description of the present utility model, it is to be understood that distal refers to the end of the instrument or component that is distal to the operator and proximal refers to the end of the instrument or component that is proximal to the operator; axial refers to a direction parallel to the central line of the distal and proximal ends of the instrument or component, and radial refers to a direction perpendicular to the axial direction; the inner and outer are positions defined relative to the distance of the center of the instrument or component, wherein the inner is a position near the center of the instrument or component and the outer is a position away from the center of the instrument or component. The above description of orientation words is merely for convenience in describing embodiments of the present utility model and for simplicity of description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting embodiments of the present utility model.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "coupled," "affixed," and the like are to be construed broadly, and may be, for example, fixedly coupled, detachably coupled, or integrally formed. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.
In the description of the present utility model, plural means two or more.
The following disclosure provides many different implementations, or examples, for implementing different configurations of embodiments of the utility model. In order to simplify the disclosure of embodiments of the present utility model, components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the present utility model.
Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 12, the present embodiment provides an intravascular cutting catheter system including a first occlusion balloon catheter assembly 1, a cutting catheter assembly 2, and a second occlusion balloon catheter assembly 3, and a method of using the same.
Specifically, the first occlusion balloon catheter assembly 1 comprises a first catheter 11 and a first occlusion balloon 12, the first catheter 11 is provided with a first cavity channel for the guide wire 4 to pass through and a second cavity channel for gas or liquid to pass through, the first cavity channel and the second cavity channel respectively extend along the axial direction of the first catheter 11, the first occlusion balloon 12 is fixedly sleeved on the outer periphery of the distal end of the first catheter 11, and the interior of the first occlusion balloon 12 is communicated with the second cavity channel. The proximal end of the first catheter 11 is provided with a first catheter seat 13, the first catheter seat 13 is provided with a first main channel and a first branch channel, the proximal ends of the first main channel and the first branch channel are respectively communicated with the outside, the distal end of the first main channel is communicated with the proximal end of the first cavity channel, the first main channel is coaxial with the first cavity channel, the distal end of the first branch channel is communicated with the second cavity channel, the proximal end opening of the first main channel is a guide wire opening, the proximal end opening of the first branch channel is a pressure increasing and releasing opening, and the pressure increasing and releasing device can be communicated with the pressure increasing and releasing device. The first catheter hub 13 is Y-shaped in this embodiment. The first occlusion balloon 12 has an expanded state and a contracted state, the first occlusion balloon 12 is pressurized and expanded by introducing gas or liquid into the first occlusion balloon 12, and the radial dimension or contraction is reduced by sucking the liquid or gas in the first occlusion balloon 12 and releasing pressure from the first occlusion balloon 12. In this embodiment, the first occlusion balloon 12 is rotated about the axial direction to form a plurality of coiled petals as the first occlusion balloon 12 transitions from the expanded state to the contracted state.
Specifically, the cutting catheter assembly 2 includes a second catheter 21, a third catheter 22 and a cutter 23, the second catheter 21 is provided with a third cavity for the first blocking balloon catheter assembly 1 to pass through and extending along the axial direction of the second catheter 21, the third catheter 22 is slidably sleeved on the outer periphery of the second catheter 21, the distal end of the second catheter 21 extends out of the distal end of the third catheter 22, a fourth cavity for sucking the cut lesion plaque 5 is formed between the outer wall of the second catheter 21 and the inner wall of the third catheter 22, the distal end of the cutter 23 is fixedly connected with the distal end of the second catheter 21, the proximal end of the cutter 23 is fixedly connected with the distal end of the third catheter 22, a notch 232 is arranged on the side wall of the cutter 23, the fourth cavity is communicated with the outside through the notch 232, the cutter 23 has a radially contracted state and a radially expanded state, the maximum outer diameter of the cutter 23 in the radially expanded state is larger than the maximum outer diameter of the cutter 23 in the radially contracted state, and the cutter 23 is converted between the radially contracted state and the radially expanded state when the cutter 23 slides relative to the second catheter 21. In this embodiment, the outer diameter of the cutter 23 increases and then decreases from the proximal end to the distal end when the cutter 23 is in the radially expanded state. The cutter 23 includes a plurality of cutting elements 231 spaced apart along the circumference of the second conduit 21 with gaps 232 between adjacent cutting elements 231. The cutting element 231 includes a first portion 2311 and a second portion 2312 of equal length, the distal end of the first portion 2311 being fixedly connected to the distal end of the second catheter 21, the proximal end of the first portion 2311 being connected to the distal end of the second portion 2312, the proximal end of the second portion 2312 being connected to the distal end of the third catheter 22, the first portion 2311 extending obliquely from the distal end to the proximal end in a direction away from the second catheter 21, and the second portion 2312 extending obliquely from the distal end to the proximal end in a direction toward the second catheter 21 when the cutter 23 is in the radially expanded state.
In this embodiment, the cutting catheter assembly 2 further comprises an operating handle disposed between the proximal end of the second catheter 21 and the proximal end of the third catheter 22, by which the third catheter 22 is slid relative to the second catheter 21. The operating handle includes an operating handle body 241 provided at a proximal end of the third catheter 22, a pushing channel 2411 is formed inside the operating handle body 241, a proximal end of the second catheter 21 is located in the pushing channel 2411, a threaded protrusion is provided at a proximal end of the second catheter 21, a threaded groove matching the threaded protrusion is provided in the pushing channel, and the third catheter 22 is slid relative to the second catheter 21 by rotating the operating handle body 241.
In this embodiment, the operating handle body 241 is further provided with a button accommodating cavity and a control button 242 inserted in the button accommodating cavity, the central axis of the button accommodating cavity is perpendicular to the central axis of the pushing channel 2411, the button accommodating cavity is communicated with the pushing channel 2411, the lower end of the control button 242 is provided with a thread groove capable of being matched with the thread protrusion, the control button 242 has a pressed state and a pulled-out state, when the control button 242 is in the pressed state, the lower end of the control button 242 is matched and fixed with the thread protrusion, and when the control button 242 is in the pulled-out state, the lower end of the control button 242 is separated from the thread protrusion.
In this embodiment, the proximal end of the third catheter 22 is further provided with a connection seat, which includes a bearing assembly 243 welded and sleeved on the third catheter 22, a connection portion 244 disposed on the bearing assembly 243 and used for connecting a withdrawal pipe, and a withdrawal passage 2441 is formed on the connection portion 244, and the withdrawal passage 2441 is in communication with the fourth channel. The bearing assembly 243 is kept airtight inside and outside by rubber rings.
Specifically, the second occlusion balloon catheter assembly 3 includes a fourth catheter 31 and a second occlusion balloon 32, the fourth catheter 31 is provided with a fifth channel through which the cutting catheter assembly 2 passes and a sixth channel through which the gas or liquid passes, the fifth channel and the sixth channel extend along the axial direction of the fourth catheter 31, respectively, the second occlusion balloon 32 is fixedly sleeved on the outer periphery of the distal end of the second catheter 21, and the interior of the second occlusion balloon 32 is communicated with the sixth channel. The proximal end of the second catheter 21 is provided with a second catheter seat 33, the second catheter seat 33 is provided with a second main channel and a second branch channel, the proximal ends of the second main channel and the second branch channel are respectively communicated with the outside, the distal end of the second main channel is communicated with the proximal end of the fifth channel, the second main channel is coaxial with the fifth channel, the distal end of the second branch channel is communicated with the sixth channel, the proximal end opening of the second main channel is an inlet and an outlet for the cutting catheter assembly 2, the proximal end opening of the second branch channel is a pressure increasing and releasing opening, and the pressure increasing and releasing device can be communicated with the pressure increasing and releasing device. The second catheter hub 33 is Y-shaped in this embodiment. The second occlusion balloon 32 has an expanded state and a contracted state, the second occlusion balloon 32 is pressurized and expanded by introducing gas or liquid into the second occlusion balloon 32, and the second occlusion balloon 32 is depressurized by sucking the liquid or gas in the second occlusion balloon 32 to reduce the radial dimension or contraction. In this embodiment, the second occlusion balloon 32 is rotated about the axial direction to form a plurality of coiled petals as the second occlusion balloon 32 transitions from the expanded state to the contracted state.
When the cutter 23 is positioned between the first blocking balloon 12 and the second blocking balloon 32, the first blocking balloon 12 and the second blocking balloon 32 are in a inflated state, and the cutter 23 is shifted from a radially contracted state to a radially expanded state; and/or, the cutter 23 cuts the endovascular lesion plaque 5 while the cutter 23 in the radially expanded state moves in the direction of its axis or rotates about its axis.
The method of using the intravascular catheter system of this embodiment is as follows:
1) The first occlusion balloon catheter assembly 1, the cutting catheter assembly 2 and the second occlusion balloon catheter assembly 3 are assembled, and the first occlusion balloon catheter assembly 1, the cutting catheter assembly 2 and the second occlusion balloon catheter assembly 3 are coaxially penetrated (the first occlusion balloon 12 is in a contracted state, the cutter 23 is in a radially contracted state, and the second occlusion balloon 32 is in a contracted state) along the guide wire 4 into a human body in the manner of fig. 1.
2) The required distance between the first blocking balloon 12 and the second blocking balloon 32 is adjusted according to the area of the lesion tissue, the blood vessel is blocked by the first blocking balloon 12 and the second blocking balloon 32 after pressurization and expansion, and the cutting catheter assembly 2 is adjusted back and forth by operating the handle so that the cutter 23 reaches a designated position.
3) When the control button 242 is pulled out, the second guide tube 21 is controlled to push backwards along the third guide tube 22 by the screw rotation of the operation handle, so that the front end cutter 23 can be unfolded, and an operator can precisely control the longitudinal outer diameter of the cutter 23 when being unfolded by the rotation of the handle, so as to control the cutting state.
4) Pressing the control button 242, by blocking the threaded movement, causes the second conduit 21 and the third conduit 22 to lock up, and rotating the operating handle allows the entire cutting conduit assembly 2 to rotate the cutter 23, thereby effecting manual control of the rotation of the cutter 23 in a counter-clockwise direction.
5) Through negative pressure, the cut pathological tissue is sucked into the fourth cavity from the notch 232 of the cutter 23, enters an external extraction pipeline through the extraction channel 2441 and smoothly leaves the human body.
6) After the cutting is completed, the first blocking balloon 12, the cutter 23 and the second blocking balloon 32 are tightened and exit the human body along the guide wire 4.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. An intravascular catheter system, characterized by: the intravascular cutting catheter system includes:
the first plugging balloon catheter assembly comprises a first catheter and a first plugging balloon, wherein the first catheter is provided with a first cavity channel for a guide wire to pass through and a second cavity channel for gas or liquid to pass through, the first cavity channel and the second cavity channel extend along the axial direction of the first catheter respectively, the first plugging balloon is fixedly sleeved on the outer periphery of the distal end of the first catheter, and the interior of the first plugging balloon is communicated with the second cavity channel;
the cutting catheter assembly comprises a second catheter, a third catheter and a cutter, wherein the second catheter is provided with a third cavity which is used for the first plugging balloon assembly to pass through and extends along the axial direction of the second catheter, the third catheter is slidably sleeved on the periphery of the second catheter, the distal end of the second catheter extends out of the distal end of the third catheter, a fourth cavity used for sucking a cut lesion plaque is formed between the outer wall of the second catheter and the inner wall of the third catheter, the distal end of the cutter is fixedly connected with the distal end of the second catheter, the proximal end of the cutter is fixedly connected with the distal end of the third catheter, a notch is formed in the side wall of the cutter, the fourth cavity is communicated with the outside through the notch, the cutter has a radial contracted state and a radial expanded state, the maximum outer diameter of the cutter in the radial expanded state is larger than the maximum outer diameter of the cutter in the radial contracted state, and the cutter is converted between the radial contracted state and the radial expanded state when the cutter slides relative to the second catheter;
the second plugging balloon catheter assembly comprises a fourth catheter and a second plugging balloon, wherein the fourth catheter is provided with a fifth cavity channel for the cutting catheter assembly to pass through and a sixth cavity channel for gas or liquid to pass through, the fifth cavity channel and the sixth cavity channel extend along the axial direction of the fourth catheter respectively, the second plugging balloon is fixedly sleeved on the outer periphery of the distal end of the second catheter, and the interior of the second plugging balloon is communicated with the sixth cavity channel;
when the cutter is positioned between the first blocking balloon and the second blocking balloon, the first blocking balloon and the second blocking balloon are in a swelling state, and the cutter is converted from a radial contraction state to a radial expansion state; and/or the cutter in the radial expansion state cuts the intravascular lesion plaque when moving along the axial direction or rotating around the axial direction.
2. The intravascular catheter system of claim 1, wherein: the outer diameter of the cutter increases and decreases from the proximal end to the distal end when the cutter is in the radially expanded state.
3. The intravascular catheter system of claim 1, wherein: the cutter comprises a plurality of cutting elements which are distributed at intervals along the circumferential direction of the second catheter, and the gaps are arranged between two adjacent cutting elements.
4. An intravascular catheter system according to claim 3, wherein: the cutting element comprises a first part and a second part which are equal in length, the distal end of the first part is fixedly connected with the distal end of the second catheter, the proximal end of the first part is connected with the distal end of the second part, the proximal end of the second part is connected with the distal end of the third catheter, when the cutter is in a radial expansion state, the first part extends obliquely from the distal end to the proximal end and away from the second catheter, and the second part extends obliquely from the distal end to the proximal end and towards a direction close to the second catheter.
5. The intravascular catheter system of claim 1, wherein: the cutting catheter assembly further includes an operating handle disposed between the proximal end of the second catheter and the proximal end of the third catheter, with the operating handle sliding the third catheter relative to the second catheter.
6. The intravascular catheter system of claim 5, wherein: the operation handle comprises an operation handle body arranged at the proximal end of the third catheter, a pushing channel is formed in the operation handle body, the proximal end of the second catheter is located in the pushing channel, a threaded protrusion is arranged at the proximal end of the second catheter, a threaded groove matched with the threaded protrusion is arranged in the pushing channel, and the third catheter slides relative to the second catheter by rotating the operation handle body.
7. The intravascular catheter system of claim 6, wherein: the operation handle body is further provided with a button accommodating cavity and a control button inserted in the button accommodating cavity, the central axis of the button accommodating cavity is vertical to the central axis of the pushing channel, the button accommodating cavity is communicated with the pushing channel, the lower end part of the control button is provided with a thread groove matched with the thread protrusion, the control button is in a pressing state and a pulling-out state, when the control button is in the pressing state, the lower end part of the control button is matched and fixed with the thread protrusion, and when the control button is in the pulling-out state, the lower end part of the control button is separated from the thread protrusion.
8. The intravascular catheter system of claim 1, wherein: the proximal end of the third catheter is also provided with a connecting seat, the connecting seat comprises a bearing assembly which is sleeved on the third catheter in a welding way, a connecting part which is arranged on the bearing assembly and is used for connecting a pumping pipeline is formed on the connecting part, and the pumping channel is communicated with the fourth cavity.
9. The intravascular catheter system of claim 1, wherein: the proximal end of the first catheter is provided with a first catheter seat, the first catheter seat is provided with a first main channel and a first branch channel, the proximal ends of the first main channel and the first branch channel are respectively communicated with the outside, the distal end of the first main channel is communicated with the proximal end of the first cavity channel, the first main channel is coaxial with the first cavity channel, and the distal end of the first branch channel is communicated with the second cavity channel;
the proximal end of the second catheter is provided with a second catheter seat, the second catheter seat is provided with a second main channel and a second branch channel, the proximal ends of the second main channel and the second branch channel are respectively communicated with the outside, the distal end of the second main channel is communicated with the proximal end of the fifth cavity channel, the second main channel is coaxial with the fifth cavity channel, and the distal end of the second branch channel is communicated with the sixth cavity channel;
the first blocking balloon and the second blocking balloon are compliant blocking balloons with compliance not less than 20%.
10. The intravascular catheter system of claim 1, wherein: when the first blocking balloon and the second blocking balloon are converted from an expanded state to a contracted state, the first blocking balloon and the second blocking balloon respectively rotate around the axial direction to form a plurality of wound valve bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320406468.5U CN219461323U (en) | 2023-03-07 | 2023-03-07 | Intravascular cutting catheter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320406468.5U CN219461323U (en) | 2023-03-07 | 2023-03-07 | Intravascular cutting catheter system |
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| Publication Number | Publication Date |
|---|---|
| CN219461323U true CN219461323U (en) | 2023-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320406468.5U Active CN219461323U (en) | 2023-03-07 | 2023-03-07 | Intravascular cutting catheter system |
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| Country | Link |
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| CN (1) | CN219461323U (en) |
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2023
- 2023-03-07 CN CN202320406468.5U patent/CN219461323U/en active Active
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