Anti-falling rotary cutting device

Abstract

The utility model provides a kind of anti-falling rotary cutting device, belong to medical appliance technical field, comprising: rotary cutting catheter, rotary cutting part, dilator, balloon, tool rest, multiple rotary cutting knives.Rotary cutting catheter's outer surface is provided with rotary cutting mouth;Rotary cutting part is arranged on the surface of rotary cutting mouth;The inside of rotary cutting catheter is provided with cavity, and dilator is detachably installed in cavity;Balloon is arranged in the side of rotary cutting catheter away from rotary cutting mouth;Tool rest is installed in rotary cutting part;Multiple rotary cutting knives are distributed on tool rest.It is used for the rotary cutting of intravascular plaque, enlarges lumen area, and is convenient for balloon expansion in later period.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a rotary cutting device that prevents detachment. Background Technology

[0002] Arteriovenous fistula formation alters existing hemodynamics, and the high levels of systemic inflammation and oxidative stress caused by kidney disease, along with repeated punctures during hemodialysis, easily lead to vascular stenosis and acute thrombotic plaque formation. The main treatments for arteriovenous fistula stenosis and acute thrombosis are percutaneous transluminal angioplasty (PTA) and surgery. PTA primarily involves balloon dilation, but for highly resistant fibrous plaque stenosis, existing pressure-focused balloons (including cutting balloons, chocolate balloons, and scoring balloons) are less effective.

[0003] In existing technologies, balloons are used to dilate the narrowed areas of blood vessels. However, for high-resistance plaque stenosis, balloons do not solve the actual problem of the plaque and cannot completely overcome the elastic recoil of the lesion. Excessive pressure can easily cause the blood vessel to lose elasticity and rupture. Therefore, it is necessary to perform rotary cutting on the lesion area to obtain a larger lumen and maintain unobstructed blood flow. Utility Model Content

[0004] This invention provides a rotary cutting device to prevent detachment, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A non-detachable rotary cutting device includes: a rotary cutting guide, a rotary cutting section, an expander, a balloon, a blade holder, and multiple rotary cutting blades. The outer surface of the rotary cutting guide has a rotary cutting opening; the rotary cutting section is disposed on the surface of the rotary cutting opening; a cavity is provided inside the rotary cutting guide, and the expander is detachably installed in the cavity; the balloon is disposed on the side of the rotary cutting guide away from the rotary cutting opening; the blade holder is mounted on the rotary cutting section; and multiple rotary cutting blades are distributed on the blade holder.

[0007] Furthermore, it also includes: two contrast rings, a rotating part, and an indicator plate. The two contrast rings are located on the surface of the rotary cutting catheter, and the two contrast rings are respectively located at both ends of the balloon; the rotating part is sleeved on the end of the rotary cutting catheter away from the rotary cutting part; the indicator plate is disposed on the rotating part, and the diameter of the indicator plate is aligned with the direction of the rotary cutting opening.

[0008] Furthermore, the rotary cutting conduit has a first channel, and the balloon has an air inlet. The first channel is connected to the air inlet, and filler is injected into the first channel to push out the balloon.

[0009] Furthermore, the expander has a connecting groove on its side, and the top of the connecting groove is connected and matched with the rotary cutting opening.

[0010] Furthermore, the end face of the rotating part is fitted with a moiré pattern.

[0011] Furthermore, a support ring and a protective component are provided at the end of the connecting groove away from the expander, and the protective component is an integrally formed flexible conical structure.

[0012] Furthermore, the bottom outer wall of the first channel is connected to a one-way valve.

[0013] Furthermore, it also includes a negative pressure suction device. The expander is provided with an output channel, through which the negative pressure suction device suctions the plaque.

[0014] This utility model provides a rotary cutting device to prevent detachment, which has the following advantages:

[0015] The combination of the rotary cutting catheter and the cutting port allows for continuous circumferential cutting at the cutting port location. The combination of the dilator and the connecting groove allows the circumferentially cut plaque to fall off promptly, facilitating plaque removal. The combination of the blade holder and the rotary cutting blade increases the circumferential cutting range of the rotary cutting unit, matching irregularly proliferating plaques and thus improving the treatment effect of circumferential cutting. At the same time, the use of multiple blades greatly protects the physiological function of blood vessels, allowing plaques of different thicknesses and shapes to be circumferentially cut, which is conducive to improving treatment results. Furthermore, the height of the rotary cutting unit is greater than the setting height of the cutting port, allowing the rotary cutting unit to contact the plaque more quickly, reducing adjustment time and improving treatment precision. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of an anti-detachment rotary cutting device provided in an embodiment of this utility model;

[0018] Figure 2 An exploded view of an anti-detachment rotary cutting device provided in an embodiment of this utility model;

[0019] Figure 3 An enlarged view of the installation structure of an anti-detachment rotary cutting device provided in an embodiment of this utility model;

[0020] Figure 4 A radial cross-sectional view of an anti-detachment rotary cutting device in an expanded state, provided for an embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the installation structure of the blade holder and rotary cutter provided in an embodiment of the present utility model.

[0022] In the diagram: 1-Spinning catheter; 2-Spinning port; 3-Spinning section; 4-Rotating section; 5-Indicator plate; 6-Diffuser; 7-Connecting groove; 8-Support ring; 9-Protective component; 21-Balloon; 212-Illuminating ring; 31-Scalpel holder; 32-Spinning blade; 11-First channel; 12-Moiré pattern; 13-One-way valve; 14-Negative pressure suction device. Detailed Implementation

[0023] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0024] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to welding, bolting, or riveting; they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Example:

[0028] like Figures 1 to 4As shown in the figure, this utility model embodiment proposes a plaque excision catheter with an anti-bending balloon 21, comprising: an excision catheter 1, an excision section 3, an expander 6, a balloon 21, a blade holder 31, and multiple excision blades 32. The outer surface of the excision catheter 1 is provided with an excision opening 2; the excision section 3 is disposed on the surface of the excision opening 2; a cavity is provided on the inner side of the excision catheter 1, and the expander 6 is detachably installed in the cavity; the balloon 21 is disposed on the side of the excision catheter 1 away from the excision opening 2; the blade holder 31 is mounted on the excision section 3; and multiple excision blades 32 are distributed on the blade holder 31.

[0029] In this embodiment, the outer surface of the rotary cutting catheter 1 is provided with a rotary cutting opening 2, the surface of the rotary cutting opening 2 is provided with a rotary cutting part 3, and the inner side of the rotary cutting catheter 1 is provided with a cavity. The rotary cutting catheter 1 is equipped with a dilator 6, and the side of the dilator 6 is provided with a connecting groove 7. The top of the connecting groove 7 is connected and matched with the rotary cutting opening 2. The side of the rotary cutting catheter 1 away from the rotary cutting opening 2 is provided with a spindle-shaped balloon 21. The structure of the spindle-shaped balloon 21 makes it easier for the catheter to pass through the narrow part of the plaque, thereby gradually increasing the pressure and making it easier to accurately cut the plaque in the blood vessel wall. The rotary cutting part 3 includes a blade holder 31, and the top of the blade holder 31 is provided with a rotary cutting blade 32.

[0030] In the implementation of this embodiment, the following are also included: two imaging rings 212, a rotating part 4, and an indicator plate 5. The two imaging rings 212 are located on the surface of the catheter, and the two imaging rings 212 are respectively located at both ends of the balloon 21; the rotating part 4 is sleeved on the end of the rotary cutting catheter 1 away from the rotary cutting part 3; the indicator plate 5 is disposed on the rotating part 4, and the diameter of the indicator plate 5 is aligned with the direction of the rotary cutting opening 2.

[0031] In this embodiment, the combination of the blade holder 31 and the rotary cutting blade 32 further increases the circumferential cutting range of the rotary cutting section 3. Among the multiple rotary cutting blades 32, each rotary cutting blade 32 is higher than the previous rotary cutting blade 32, matching the irregularly proliferating plaque, thereby improving the treatment effect of circumferential cutting. At the same time, the structure of multiple blades distributed at intervals greatly protects the physiological function of blood vessels. The addition of the imaging ring 212 can be used in conjunction with the angiography display equipment to directly observe the expansion of the balloon 21 to adapt to different plaque removal needs. It can also help transmit the elasticity of the balloon 21, thereby allowing the rotary cutting section 3 to be lifted up, facilitating the circumferential cutting of plaque.

[0032] The indicator plate 5 is provided on the surface of the rotating part 4. When both the indicator plate 5 and the rotary cutting port 2 are at the top of the rotary cutting conduit 1, the expander 6 needs to be pulled out from the inner cavity of the rotary cutting conduit 1 so that the indicator plate 5 is at the top. When the indicator plate 5 and the rotary cutting port 2 are found to be at the upper and lower positions of the rotary cutting conduit 1, the expander 6 needs to be pulled out so that the indicator plate 5 is at the lower position. This method can ensure that the circumferential cutting direction of the rotary cutting port 2 is always correct.

[0033] In the implementation of this embodiment, a first channel 11 is opened in the rotary cutting catheter 1, and an air inlet is opened on the balloon 21. The first channel 11 is connected to the air inlet. Filler is injected into the first channel 11 to push out the balloon 21.

[0034] In this embodiment, the filler can be a safe gas or a solution, and can be used in conjunction with contrast fluid to perform contrast imaging on the balloon 21 to facilitate visualization of the specific situation at the excision site. Combined with the positioning of the contrast ring 212, it improves the accuracy of the surgery.

[0035] In the implementation of this embodiment, the side of the expander 6 is provided with a connecting groove 7, and the top of the connecting groove 7 is connected and matched with the rotary cutting port 2.

[0036] In this embodiment, the combination of the rotary cutting conduit 1 and the rotary cutting port 2 helps the rotary cutting part 3 to continuously cut around the perimeter at the rotary cutting port 2. The combination of the expander 6 and the connecting groove 7 allows the circumcised plaque to fall off in time, facilitating the cleaning of the plaque.

[0037] In the implementation of this embodiment, the end face of the rotating part 4 is fitted with a moiré pattern 12.

[0038] In this embodiment, the sleeve of the rotating part 4 and the cutting catheter 1 allows medical personnel to hold the cutting catheter 1 and rotate it stably. At the same time, the fitting installation of the moiré pattern 12 makes it less likely for the medical personnel's hands to slip when operating the rotating part 4.

[0039] In the implementation of this embodiment, a support ring 8 and a protective element 9 are provided at the end of the connecting groove 7 away from the expander 6. The protective element 9 is an integrally formed flexible conical structure.

[0040] In this embodiment, the protective element 9 further ensures the integrity of the support ring 8 structure, which is beneficial for subsequent patch removal.

[0041] In the implementation of this embodiment, the bottom outer wall of the first channel 11 is connected to the one-way valve 13.

[0042] In this embodiment, the airtightness control of the internal first channel 11 is further improved by using a one-way valve 13.

[0043] In the implementation of this embodiment, a negative pressure suction device 14 is also included. The expander 6 is provided with an output channel, and the negative pressure suction device 14 suctions the plaque through the output channel.

[0044] In this embodiment, further, when the patch is rotary cut, the degree of adhesion between the rotary cutter 32 and the patch is controlled and adjusted by adjusting the negative pressure suction device 14, and the patch is extracted from the set output channel in a timely manner by using the rotary cutter 32.

[0045] In some implementations, a rotating tooth and an elastic limiting member are provided between the rotary cutting guide 1 and the expander 6. The elastic limiting member is located on the outer wall of the expander 6, and the rotating tooth is located on the inner wall of the rotary cutting guide 1. The elastic limiting member has elastic locking teeth, which mesh with the rotating tooth. Driven by the elastic locking teeth and the rotating tooth, the rotary cutting guide 1 rotates unidirectionally relative to the expander 6, thereby preventing the rotary cutting blade 32 from rotating in the opposite direction.

[0046] In summary, when using a plaque excision catheter with an anti-bending balloon 21, a puncture needle is first used to puncture the blood vessel in the patient's arm, and then a guidewire is inserted along the puncture needle. After the guidewire is set, the puncture needle is withdrawn, and then the dilator and sheath are inserted into the blood vessel along the guidewire. The guidewire and dilator are withdrawn, and the excision catheter 1 and dilator 6 are inserted into the blood vessel along the sheath, so that the excision part 3 comes into contact with the plaque. Then, air is inflated into the first channel 11 through the one-way valve 13, which can stably push out the excision part 3, allowing the excision blade 32 to continuously circumferentially cut. At the same time, the connecting groove 7 on the side of the dilator 6 helps the circumferentially cut plaque to fall down, and finally the circumferentially cut plaque is stably extracted.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A rotary cutting device for preventing detachment, characterized in that, include: A rotary cutting conduit (1) has a rotary cutting opening (2) on its outer surface; A rotary cutting section (3) is provided on the surface of the rotary cutting opening (2); The expander (6) has a cavity on the inner side of the rotary cutting catheter (1), and the expander (6) can be detachably installed in the cavity; A balloon (21) is positioned on the side of the rotary cutting catheter (1) away from the rotary cutting opening (2); A blade holder (31) is mounted on the rotary cutting section (3). The blade holder (31) is distributed along the axial direction of the rotary cutting guide tube (1). The blade holder (31) gradually decreases along the installation direction. Multiple rotary cutting blades (32) are distributed on the blade holder (31).

2. The anti-detachment rotary cutting device according to claim 1, characterized in that, Also includes: Two radiopaque rings (212) are located on the surface of the rotary cutting catheter (1), and the two radiopaque rings (212) are located at the two ends of the balloon (21); The rotating part (4) is sleeved on the end of the rotary cutting guide (1) away from the rotary cutting part (3); An indicator plate (5) is provided on the rotating part (4), and the diameter of the indicator plate (5) is aligned with the direction of the rotary cut (2).

3. The anti-detachment rotary cutting device according to claim 2, characterized in that, The rotary cutting catheter (1) has a first channel (11) and the balloon (21) has an air inlet. The first channel (11) is connected to the air inlet. Filler is injected into the first channel (11) to push out the balloon (21).

4. The anti-detachment rotary cutting device according to claim 3, characterized in that, The expander (6) has a connecting groove (7) on its side, and the top of the connecting groove (7) is connected and matched with the rotary cut (2).

5. The anti-detachment rotary cutting device according to claim 4, characterized in that, The end face of the rotating part (4) is fitted with a moiré pattern (12).

6. The anti-detachment rotary cutting device according to claim 5, characterized in that, The end of the connecting groove (7) away from the expander (6) is provided with a support ring (8) and a protective member (9), and the protective member (9) is an integrally formed flexible conical structure.

7. The anti-detachment rotary cutting device according to claim 6, characterized in that, The bottom outer wall of the first channel (11) is connected to a one-way valve (13).

8. The anti-detachment rotary cutting device according to claim 7, characterized in that, Also includes: The negative pressure suction device (14) has an output channel inside the expander (6), and the negative pressure suction device (14) suctions the plaque through the output channel.

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