Swing type peripheral thrombus removing device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a swing type peripheral thrombus removing device which comprises a suction catheter, a movable tube set, a woven mesh tube and a driving device, the woven mesh tube is driven by the driving device to rotate through the movable tube set, and the woven mesh tube can rotate around itself to cut thrombus. Due to the fact that the deformation section made of the elastic material is arranged between the woven mesh pipe and the movable pipe set, the deformation section is driven to move circumferentially along with the woven mesh pipe under rotation of the woven mesh pipe, the rotation radius of the woven mesh pipe is increased, and the woven mesh pipe is in a swinging state until the whole thrombus is covered. Therefore, the thrombus close to the inner wall of the blood vessel is completely removed, and the technical problem that the thrombus cannot be thoroughly removed in the prior art is effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of medical apparatus and instruments, more particularly to a swing type peripheral thrombus removing device. BACKGROUND

[0002] Vascular disease has become the first big fatal disease in China, and vascular embolism has become the main pathogenic factor in vascular disease. Adopting thrombectomy device intervention thrombectomy has many advantages such as small trauma, short postoperative recovery time, fewer complications after treatment, good operation effect and can be more accepted by patients. The existing intervention thrombectomy scheme mainly includes thrombus aspiration, which needs to drag and remove the thrombus in the blood vessel, but directly dragging the thrombus can easily damage the blood vessel wall, resulting in large amount of blood loss.

[0003] The prior art discloses a kind of thrombus removing system, including rotating tube assembly, suction catheter assembly and drive handle, rotating tube assembly includes inner tube, flexible drive shaft, rotating basket and balloon assembly, drive handle is connected rotating basket by flexible drive shaft, flexible drive shaft includes elastic spiral spring pipe section and rigid metal pipe section, inner tube is sequentially arranged in drive handle, flexible drive shaft and rotating basket, and flexible drive shaft and rotating basket are movably sleeved in inner tube, one end of inner tube away from drive handle extends rotating basket and is connected with balloon assembly, balloon assembly is used to anchor the position of thrombus removing system in blood vessel. Suction catheter assembly is movably sleeved on the outside of rotating tube assembly and is used for injecting thrombolytic agent and sucking thrombus fragments;The scheme utilizes drive handle to drive rotating basket to rotate sequentially through rigid metal pipe section and elastic spiral spring pipe section, so that rotating basket can cut thrombus in blood vessel, and blood vessel wall is not easily damaged.

[0004] However, for larger thrombus, the mode of driving rotating basket to rotate to cut thrombus has limitations, because the rotating radius cannot cover the whole thrombus, cannot completely remove the thrombus close to the inner wall of blood vessel, and there is a technical problem that thrombus cannot be completely removed. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the deficiency that thrombus cannot be completely removed in prior art, and provides a swing type peripheral thrombus removing device.

[0006] To solve the above technical problems, the utility model adopts the technical scheme that:

[0007] A swing type peripheral thrombus removing device, including suction catheter, movable tube group arranged in the suction catheter, braided mesh tube arranged at one end of the movable tube group, and driving device arranged at the other end of the movable tube group and used for driving the braided mesh tube to rotate, the braided mesh tube and the movable tube group are provided with a deformation section of elastic material.

[0008] The utility model discloses a fling type outer peripheral blood embolus removing device, the movable pipe group is set in the suction catheter, and the suction catheter can suck away the chopped embolus, avoids causing the secondary blockage of blood vessel, the woven mesh pipe is arranged at one end of the movable pipe group, and the driving device is arranged at the other end of the movable pipe group, utilizes the driving device to drive the woven mesh pipe rotation through the movable pipe group, and the woven mesh pipe will rotate chopped embolus around itself, and since the elastic material deformation section is arranged between the woven mesh pipe and the movable pipe group, the deformation section is driven to move along with the woven mesh pipe under the rotation of the woven mesh pipe, thereby increasing the rotation radius of the woven mesh pipe, realizing the fling state of the woven mesh pipe, covering the whole embolus, thereby completely removing the embolus close to the inner wall of blood vessel, and the technical problem that the embolus cannot be completely removed in the prior art is effectively solved.

[0009] Further, the movable pipe group includes a hypotube and a nickel-titanium core wire movably arranged in the hypotube, one end of the nickel-titanium core wire is connected with the woven mesh pipe, the other end is connected with the driving device, the deformation section is a rubber tube having two ends connected with the hypotube and the woven mesh pipe respectively, and the nickel-titanium core wire is movably arranged in the rubber tube. The nickel-titanium core wire is a special alloy material having shape memory effect, has high elastic deformation capacity, can be bent and deformed in a large range without permanent deformation, and can stably transmit axial torque after being bent; the hypotube can flexibly adapt to various bending deformations, and the design of connecting the nickel-titanium core wire with the hypotube is to drive the deformation of the woven mesh pipe, and the two have axial and turning degrees of freedom, meeting the shape switching between the contraction mode and the open state of the woven mesh pipe; the rubber tube is arranged between the hypotube and the woven mesh pipe as the deformation section, realizing the fling cutting of the woven mesh pipe.

[0010] Further, an outer wall of the deformation section is sleeved with a heat shrink tube, and the length of the heat shrink tube is the same as that of the deformation section. The heat shrink tube is wrapped outside the deformation section, so that the outer wall of the deformation section and the inner wall of the blood vessel or the suction catheter have a layer of protective surface material, having an isolating protection effect.

[0011] Further, one end of the nickel-titanium core wire passes through the braided mesh tube and is connected to the end of the braided mesh tube away from the deformation section, and pulling the nickel-titanium core wire can expand or contract the braided mesh tube. One end of the nickel-titanium core wire passes through the braided mesh tube and is connected to the end of the braided mesh tube away from the deformation section, and when the other end of the braided mesh tube is connected to the deformation section, when the nickel-titanium core wire is pulled away from the thrombus, the end of the braided mesh tube away from the deformation section will be close to the deformation section, so that the braided mesh tube is extruded and expanded to a cutting state; when the nickel-titanium core wire is pushed away from the thrombus, the end of the braided mesh tube away from the deformation section will be away from the deformation section, so that the braided mesh tube is stretched and contracted, realizing the change of the braided mesh tube in different states under different use requirements, facilitating the braided mesh tube to enter the blood vessel with the suction catheter and cut the thrombus.

[0012] Further, the end of the nickel-titanium core wire connected to the braided mesh tube is a flat section treated by grinding, and the outer diameter of the flat section is smaller than the outer diameter of the nickel-titanium core wire. The end of the nickel-titanium core wire connected to the braided mesh tube is treated by grinding to a flat section with an outer diameter smaller than the outer diameter of the nickel-titanium core wire, facilitating the extension of one end of the hypotube into the other end connected to the braided mesh tube.

[0013] Further, a tapered section is provided between the flat section and the nickel-titanium core wire, the outer diameter of one end of the tapered section connected to the nickel-titanium core wire is equal to the outer diameter of the nickel-titanium core wire, and the outer diameter of the other end of the tapered section connected to the flat section is equal to the outer diameter of the flat section. The tapered section is provided between the flat section and the nickel-titanium core wire, and the outer diameter of one end of the tapered section connected to the nickel-titanium core wire is equal to the outer diameter of the nickel-titanium core wire, and the outer diameter of the other end of the tapered section connected to the flat section is equal to the outer diameter of the flat section, so that the tapered section plays a role in stable transition connection and guarantees the strength of the end of the nickel-titanium core wire.

[0014] Further, the two ends of the braided mesh tube are respectively provided with developing rings, and the two ends of the developing rings are respectively connected to the deformation section and the flat section. The developing rings at the two ends of the braided mesh tube are used to realize X-ray photography of the braided mesh tube and observe the state of the braided mesh tube.

[0015] Further, the end of the developing ring connected to the flat section is provided with a developing soft head. The developing soft head provided at the end of the developing ring connected to the flat section is used to realize X-ray photography of the thrombus and observe the state of the thrombus.

[0016] Further, the developing soft head is made of silicone or platinum-tungsten material. The developing soft head made of silicone or platinum-tungsten material can play a guiding role during surgery and is soft and will not damage the blood vessel.

[0017] Further, the outer wall of the heat shrink tube is provided with a polyvinylpyrrolidone coating. The polyvinylpyrrolidone coating is arranged on the outer wall of the heat shrink tube, and has a hydrophilic lubricating effect.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model discloses a swing type peripheral blood thrombus removing device, utilizes drive arrangement to drive the braided mesh pipe rotation through the movable pipe group, and the braided mesh pipe will start to rotate and cut the blood thrombus around itself, is equipped with the deformation section of elastic material between braided mesh pipe and movable pipe group, and the deformation section is driven to move along with braided mesh pipe along with the rotation of braided mesh pipe, thereby increasing the rotation radius of braided mesh pipe, realizing the swing state of braided mesh pipe, covering the whole blood thrombus, thereby completely removing the blood thrombus close to the inner wall of blood vessel, and effectively solve the technical problem that the blood thrombus cannot be completely removed in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a use state diagram of the swing type peripheral blood thrombus removing device;

[0021] Figure 2 It is a structure schematic view of the braided mesh pipe;

[0022] Figure 3 It is a structure schematic view of the braided mesh pipe;

[0023] Figure 4 It is a structure schematic view of the nickel titanium core wire.

[0024] In the drawings: 1, suction catheter;2, movable pipe group;21, hypotube;22, nickel titanium core wire;23, heat shrink tube;24, straight section;25, tapered section;3, braided mesh pipe;4, deformation section;5, developing ring;6, developing soft head;7, blood vessel;8, blood thrombus block. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with specific implementation. Among them, the drawing is only used for example explanation, and the representation is only schematic diagram, and not the real object drawing, and can not be understood as the limitation of this patent;In order to better explain the embodiment of the utility model, some components of the drawing will be omitted, enlarged or reduced, and not represent the size of actual product;For those skilled in the art, it is understandable that some well-known structures in the drawing and their description can be omitted.

[0026] The same or similar reference signs in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation and be operated, therefore, the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0027] Embodiment one

[0028] As Figures 1 to 3 shown is a first embodiment of the present application.

[0029] A kind of peripheral thrombus removing device of whirling, including suction catheter 1, the movable tube group 2 of being arranged in suction catheter 1, the braided mesh tube 3 being arranged at one end of movable tube group 2, and the driving device for driving braided mesh tube 3 rotation being arranged at the other end of movable tube group 2, braided mesh tube 3 and movable tube group 2 between being equipped with the deformation section 4 of elastic material. Wherein, movable tube group 2 includes hypotube 21 and the nickel-titanium core wire 22 of being arranged in hypotube 21 movably, one end of nickel-titanium core wire 22 is connected with braided mesh tube 3, the other end is connected with driving device, deformation section 4 is the rubber tube of two ends being connected with hypotube 21 and braided mesh tube 3 respectively, nickel-titanium core wire 22 is movably arranged in rubber tube. Wherein, the outer wall of deformation section 4 is sleeved with heat shrink tube 23, the length of heat shrink tube 23 is same with the length of deformation section 4. Wherein, one end of nickel-titanium core wire 22 passes through braided mesh tube 3 and is connected with the one end of braided mesh tube 3 away from deformation section 4, and braided mesh tube 3 can be expanded or contracted by pulling nickel-titanium core wire 22. Wherein, the outer wall of heat shrink tube 23 is provided with polyvinylpyrrolidone coating.

[0030] In the present embodiment, as Figure 1As shown, the movable tube group 2 is arranged in the suction catheter 1, and the suction catheter 1 can suck the cut thrombus 8 to avoid causing secondary blockage of the blood vessel 7; the braided mesh tube 3 is arranged at one end of the movable tube group 2, and the driving device is arranged at the other end of the movable tube group 2, the driving device drives the braided mesh tube 3 to rotate through the movable tube group 2, the braided mesh tube 3 starts to rotate to cut the thrombus 8, and the elastic material deformation section 4 is arranged between the braided mesh tube 3 and the movable tube group 2, so that the deformation section 4 is driven to move circumferentially with the braided mesh tube 3 under the rotation of the braided mesh tube 3, thereby increasing the rotation radius of the braided mesh tube 3, achieving the swinging state of the braided mesh tube 3, covering the whole thrombus 8, and completely removing the thrombus 8 close to the inner wall of the blood vessel 7, thereby effectively solving the technical problem that the thrombus 8 cannot be completely removed in the prior art.

[0031] In this embodiment, as shown in the figure, Figure 2 The nickel-titanium core wire 22 is a special alloy material with shape memory effect, has high elastic deformation capacity, can be bent and deformed in a large range without permanent deformation, and can still stably transmit axial torque after being bent; the hypotube 21 can flexibly adapt to various bending deformations, and the nickel-titanium core wire 22 is connected to the hypotube 21, which is designed to drive the deformation of the braided mesh tube 3, and the two have axial and turning degrees of freedom, meeting the shape switching between the contraction state and the open state of the braided mesh tube 3; the rubber tube is arranged between the hypotube 21 and the braided mesh tube 3 as the deformation section 4, achieving the swinging cutting of the braided mesh tube 3 on the thrombus 8.

[0032] In this embodiment, as shown in the figure, Figure 2 The heat shrink tube 23 is wrapped outside the deformation section 4, so that the outer wall of the deformation section 4 has a layer of protective surface material between the wall of the blood vessel 7 or the inner wall of the suction catheter 1, and has an isolation protection effect.

[0033] In this embodiment, as shown in the figure, Figure 3 One end of the nickel-titanium core wire 22 is connected to the end of the braided mesh tube 3 away from the deformation section 4, and the other end of the braided mesh tube 3 is connected to the deformation section 4, so that when the nickel-titanium core wire 22 is pulled away from the thrombus 8, the end of the braided mesh tube 3 away from the deformation section 4 will be close to the deformation section 4, so that the braided mesh tube 3 is extruded and expanded to a cutting state; when the nickel-titanium core wire 22 is pushed away from the thrombus 8, the end of the braided mesh tube 3 away from the deformation section 4 will be away from the deformation section 4, so that the braided mesh tube 3 is stretched and contracted, realizing the change of the braided mesh tube in different states under different use requirements, facilitating the braided mesh tube 3 to enter the blood vessel 7 with the suction catheter 1 and cut the thrombus 8.

[0034] In this embodiment, a polyvinylpyrrolidone coating is arranged on the outer wall of the heat shrink tube 23, which has a hydrophilic lubricating effect.

[0035] Embodiment Two

[0036] As Figures 2 to 4 shown is a second embodiment of the swinging type peripheral blood embolism removing device.

[0037] This embodiment is similar to embodiment one, the difference is that the one end of the nickel-titanium core wire 22 connected with the braided mesh tube 3 is a flat section 24 treated by grinding, the outer diameter of the flat section 24 is smaller than the outer diameter of the nickel-titanium core wire 22. Further, a tapered section 25 is arranged between the flat section 24 and the nickel-titanium core wire 22, the outer diameter of the one end of the tapered section 25 connected with the nickel-titanium core wire 22 is equal to the outer diameter of the nickel-titanium core wire 22, and the outer diameter of the one end of the tapered section 25 connected with the flat section 24 is equal to the outer diameter of the flat section 24.

[0038] In this embodiment, as Figures 2 to 4 shown, the one end of the nickel-titanium core wire 22 connected with the braided mesh tube 3 is treated by grinding as a flat section 24 with an outer diameter smaller than the outer diameter of the nickel-titanium core wire 22, which is convenient for the one end of the hypotube 21 to extend into the other end and be connected with the braided mesh tube 3.

[0039] In this embodiment, as Figures 2 to 4 shown, a tapered section 25 is arranged between the flat section 24 and the nickel-titanium core wire 22, since the outer diameter of the one end of the tapered section 25 connected with the nickel-titanium core wire 22 is equal to the outer diameter of the nickel-titanium core wire 22, and the outer diameter of the one end of the tapered section 25 connected with the flat section 24 is equal to the outer diameter of the flat section 24, thus the tapered section 25 plays a role of stable transition connection, and guarantees the strength of the end of the nickel-titanium core wire 22.

[0040] Embodiment Three

[0041] As Figure 2 and Figure 3 shown is a third embodiment of the swinging type peripheral blood embolism removing device.

[0042] This embodiment is similar to embodiment one or embodiment two, the difference is that the two ends of the braided mesh tube 3 are respectively provided with developing rings 5, and the two ends of the developing rings 5 are respectively connected with the deformation sections 4 and the flat sections 24. Among them, the end of the developing ring 5 connected with the flat section 24 is provided with a developing soft head 6. Among them, the developing soft head 6 is made of silica gel material or platinum tungsten material.

[0043] In this embodiment, as Figure 2 and Figure 3 shown, the developing rings 5 at the two ends of the braided mesh tube 3 are used to realize X-ray photographing of the braided mesh tube 3, and the state of the braided mesh tube 3 is observed.

[0044] In this embodiment, as Figure 2 and Figure 3As shown, the X-ray photographing of the thrombus 8 is realized by using the developing soft head 6 arranged at the end of the developing ring 5 connected with the flat section 24, and the state of the thrombus 8 is observed.

[0045] In the embodiment, the developing soft head 6 is made of silica gel or platinum tungsten, which can play a guiding role in the operation and is soft and will not damage the blood vessel 7.

[0046] In the specific contents of the above specific embodiments, each technical feature can be combined arbitrarily without contradiction, and for the sake of brevity, all possible combinations of the above technical features are not described, but as long as the combination of the technical features does not exist, it should be considered as the scope of the present application.

[0047] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A whirling peripheral blood thrombectomy device, comprising a suction catheter (1), a movable tube set (2) arranged in the suction catheter (1), a braided mesh tube (3) arranged at one end of the movable tube set (2), and a driving device arranged at the other end of the movable tube set (2) and used for driving the braided mesh tube (3) to rotate, characterized in that: The woven mesh tube (3) is provided with an elastic material deformation section (4) between the movable tube group (2). ​ 2. The rotational peripheral thrombectomy device of claim 1, wherein: The movable tube group (2) comprises a hypotube (21) and a nickel-titanium core wire (22) movably arranged in the hypotube (21), one end of the nickel-titanium core wire (22) is connected with the woven mesh tube (3), the other end is connected with the driving device, the deformation section (4) is a rubber tube with two ends connected with the hypotube (21) and the woven mesh tube (3) respectively, and the nickel-titanium core wire (22) is movably arranged in the rubber tube.

3. The rotational peripheral thrombectomy device of claim 2, wherein: The outer wall of the deformation section (4) is sleeved with a heat shrink tube (23), and the length of the heat shrink tube (23) is the same as the length of the deformation section (4).

4. The rotational peripheral thrombectomy device of claim 2, wherein: One end of the nickel-titanium core wire (22) passes through the woven mesh tube (3) and is connected with one end of the woven mesh tube (3) away from the deformation section (4), and pulling the nickel-titanium core wire (22) can make the woven mesh tube (3) expand or shrink.

5. The rotational peripheral thrombectomy device of claim 4, wherein: The end of the nickel-titanium core wire (22) connected with the woven mesh tube (3) is a flat section (24) treated by grinding, and the outer diameter of the flat section (24) is smaller than the outer diameter of the nickel-titanium core wire (22).

6. The rotational peripheral thrombectomy device of claim 5, wherein: A tapered section (25) is arranged between the flat section (24) and the nickel-titanium core wire (22), one end of the tapered section (25) connected with the nickel-titanium core wire (22) has the same outer diameter as the nickel-titanium core wire (22), and the other end of the tapered section (25) connected with the flat section (24) has the same outer diameter as the flat section (24).

7. The rotational atherectomy device of claim 5 wherein: Both ends of the woven mesh tube (3) are respectively provided with a developing ring (5), and the developing rings (5) at both ends are respectively connected with the deformation section (4) and the flat section (24).

8. The rotational peripheral thrombectomy device of claim 7, wherein: The end of the developing ring (5) connected with the flat section (24) is provided with a developing soft head (6).

9. The rotational atherectomy device of claim 8 wherein: The developing soft head (6) is made of silica gel material or platinum tungsten material.

10. The rotational atherectomy device of claim 3 wherein: The outer wall of the heat shrink tube (23) is provided with a polyvinylpyrrolidone coating.

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