Bending-adjustable and expandable thrombus aspiration catheter

Abstract

The utility model discloses a bending-adjustable expandable thrombus aspiration catheter, which relates to the technical field of medical instruments and comprises an aspiration component, a bending-adjustable component and a handle component, the aspiration component is arranged in the handle component, the bending-adjustable component is arranged on the handle component, the aspiration component comprises an aspiration tube and a tail handle arranged at one end of the aspiration tube, and the aspiration tube is connected with the bending-adjustable component. The bending adjusting assembly is used for controlling the other end of the suction pipe to bend, and the other end of the suction pipe is provided with a catheter expansion mechanism used for expanding the other end of the suction pipe. Through the arrangement of the conveying pipe, the sliding block, the first limiting sleeve, the rotary knob, the second limiting sleeve and the rotary knob limiting piece, the bending radius of the suction pipe can be freely adjusted, the opening angle of the suction pipe can be changed, the thrombus suction range is widened, and the thrombus suction efficiency and the thrombus suction force are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a thrombus aspiration catheter which can be adjusted to bend and expand. Background Art

[0002] With the continuous development of medical technology, vascular interventional catheters, as an important medical tool, play an indispensable role in various surgeries and treatments. Especially in the diagnosis and treatment of cardiovascular diseases, vascular interventional catheters are widely used.

[0003] However, existing catheter designs often have some limitations that restrict the effectiveness of the surgery. For example, (1) the distal end of some thrombus aspiration catheters is not pre-bent, and the range of thrombus aspiration is limited. Doctors will use a shaping needle to pre-bend the distal end of the catheter with steam, but the bending angle can only be controlled by the doctor's feel and experience. (2) The distal end of some thrombus aspiration catheters is pre-bent, but the angle cannot be adjusted during use. If the angle is not appropriate, the catheter needs to be replaced, which increases the risk of vascular damage and surgical costs and prolongs the operation time. (3) The suction force is limited. When the suction pressure is consistent, the maximum suction force of the thrombus is proportional to the cross-section of the distal end of the catheter (p=F / S). The distal end of the existing catheter cannot expand, and the catheter is easily deflated when the pressure of pressure aspiration continues to increase. Utility Model Content

[0004] The utility model aims to provide a thrombus aspiration catheter which can be adjusted in bend and expand, so as to solve the above-mentioned technical problems.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A bendable and expandable thrombus aspiration catheter comprises a suction component, a bend adjustment component and a handle component. The suction component is arranged inside the handle component and the bend adjustment component is arranged on the handle component. The suction component comprises a suction tube and a tail handle arranged at one end of the suction tube. The bend adjustment component is used to control the bending of the other end of the suction tube. The other end of the suction tube has a catheter expansion mechanism for expanding the other end of the suction tube.

[0007] Preferably, the tail handle is arranged in a "Y" shape, and has a guide wire channel and a suction channel connected to the interior of the suction tube.

[0008] As a further preference, the handle assembly comprises a handle upper shell and a handle lower shell, and the handle upper shell and the handle lower shell are mutually snap-connected to form a handle structure.

[0009] As a further preference, the handle assembly further includes a stress diffusion sleeve, and the stress diffusion sleeve is provided at one end of the handle structure, and the tail handle extends out of the other end of the handle structure.

[0010] As a further preferred embodiment, the bending adjustment assembly includes a delivery pipe, a slider and a first limiting sleeve, wherein the first limiting sleeve is arranged in the handle structure, the slider is slidably arranged in the first limiting sleeve, one end of the delivery pipe is connected to the slider, and the other end of the suction pipe passes through the slider and the delivery pipe and extends out of the delivery pipe;

[0011] A first notch is formed on the inner wall of the first limiting sleeve, and flat portions are formed on both sides of the sliding block, and the flat portions are arranged in the first notch;

[0012] Slide grooves are formed on both sides of the first limiting sleeve, and external threads are formed on the outer peripheral wall of the sliding block. The external threaded portion of the sliding block extends out of the slide grooves.

[0013] As a further preference, the bending adjustment assembly further includes a knob, which is sleeved on the outside of the first limiting sleeve, and an inner circumferential wall of the knob is provided with an internal thread, which cooperates with the external thread of the slider.

[0014] As a further preference, a convex ring is provided on the outer peripheral wall of the knob, and a second notch is provided on both the handle upper shell and the handle lower shell, and the convex ring can extend out of the second notch.

[0015] As a further preference, it further includes a second limiting sleeve, wherein the second limiting sleeve is arranged in the handle structure, and the second limiting sleeve is located at one end of the knob.

[0016] As a further preference, it also includes a knob limiter, which is sleeved on the outer circumferential wall of the second limit sleeve, one end of the knob limiter is provided with a latch tooth, and the outer circumferential wall of one end of the knob is provided with a rack, and the latch tooth can be inserted into the rack.

[0017] Preferably, the catheter expansion mechanism comprises a conical mesh opening, and the conical mesh opening is arranged at the other end of the suction tube.

[0018] The above technical solution has the following advantages or beneficial effects:

[0019] In the utility model, by setting the delivery tube, the slider, the first limit sleeve, the knob, the second limit sleeve and the knob limiter, the bending radius of the suction tube can be freely adjusted, the opening angle of the suction tube can be changed, the thrombus suction range can be increased, and the thrombus suction efficiency and thrombus suction force can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the adjustable bendable and expandable thrombus aspiration catheter in the utility model;

[0021] Figure 2 It is an exploded schematic diagram of the adjustable bendable and expandable thrombus aspiration catheter in the utility model;

[0022] Figure 3 It is a schematic diagram of the internal structure of the adjustable bendable and expandable thrombus aspiration catheter in the utility model;

[0023] Figure 4 It is a schematic diagram of the structure in which the suction assembly and the bending adjustment assembly are installed in the lower shell of the handle in the utility model;

[0024] Figure 5 yes Figure 3 The enlarged view of point A in the middle;

[0025] Figure 6 yes Figure 4 Enlarged view of point B in the middle.

[0026] In the figure: 1. Suction assembly; 101. Suction tube; 102. Tail handle; 103. Guide wire channel; 104. Suction channel; 2. Bending assembly; 201. Delivery tube; 202. Slider; 203. First limit sleeve; 204. Knob; 205. Convex ring; 206. Second notch; 207. Second limit sleeve; 208. Knob limiter; 209. Rack; 210. Sealing ring; 211. Sealing ring cover; 212. Third notch; 213. Push rod; 3. Handle assembly; 301. Handle upper shell; 302. Handle lower shell; 303. Stress diffusion sleeve; 4. Conical mesh mouth. DETAILED DESCRIPTION

[0027] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Figure 1 It is a structural schematic diagram of the adjustable bendable and expandable thrombus aspiration catheter in the utility model; Figure 2 It is an exploded schematic diagram of the adjustable bendable and expandable thrombus aspiration catheter in the utility model; Figure 3 It is a schematic diagram of the internal structure of the adjustable bendable and expandable thrombus aspiration catheter in the utility model; Figure 4 It is a schematic diagram of the structure in which the suction assembly and the bending adjustment assembly are installed in the lower shell of the handle in the utility model; Figure 5 yes Figure 3 The enlarged view of point A in the middle; Figure 6 yes Figure 4 For the enlarged view of point B, please see Figures 1 to 6 As shown, a preferred embodiment is shown, which is an adjustable and expandable thrombus aspiration catheter, including a suction component 1, a bending adjustment component 2 and a handle component 3. The handle component 3 is provided with the suction component 1, and the handle component 3 is provided with the bending adjustment component 2. The suction component 1 includes a suction tube 101 and a tail handle 102 provided at one end of the suction tube 101. The bending adjustment component 2 is used to control the bending of the other end of the suction tube 101. The other end of the suction tube 101 is provided with a catheter expansion mechanism, and the other end of the suction tube 101 is expanded by the catheter expansion mechanism. In this embodiment, the suction component 1 is used to extend into the blood vessel to extract the thrombus inside the blood vessel, and the bending adjustment component 2 is used to adjust the bending radius of the suction tube 101 in the suction component 1, thereby changing the extraction range of the suction port of the suction tube 101, and at the same time, it can also drive the suction tube 101 to move, thereby controlling the catheter expansion mechanism to contract or expand, so as to facilitate the removal of the thrombus and avoid blood vessel blockage. The catheter expansion mechanism can expand the other end of the suction tube 101 to avoid the other end of the suction tube 101 from being sucked out due to the increase in suction pressure.

[0031] Further, as a preferred embodiment, the tail handle 102 is arranged in a "Y" shape, and the tail handle 102 has a guide wire channel 103 and a suction channel 104 that are connected to the inside of the suction tube 101. Figure 1As shown, the guidewire channel 103 and the suction channel 104 are connected to the suction tube 101, the guidewire channel 103 is used to insert the guidewire, and the suction channel 104 is used to connect to an external negative pressure device to provide negative pressure to facilitate the removal of the thrombus.

[0032] In this embodiment, when not in use, the guide wire channel 103 and the suction channel 104 can be sealed by a sealing cover.

[0033] Further, as a preferred embodiment, the handle assembly 3 includes a handle upper shell 301 and a handle lower shell 302, and the handle upper shell 301 and the handle lower shell 302 are mutually clamped to form a handle structure. The handle upper shell 301 and the handle lower shell 302 are clamped and connected, specifically, by the cooperation of a buckle or a slot. When the handle upper shell 301 and the handle lower shell 302 are connected together, a complete handle structure can be formed, and the handle structure is hollow inside and has through holes at both ends.

[0034] Further, as a preferred embodiment, the handle assembly 3 further includes a stress diffusion sleeve 303, one end of the handle structure is provided with the stress diffusion sleeve 303, and the tail handle 102 extends out of the other end of the handle structure. The stress diffusion sleeve 303 and the handle structure can be connected by a buckle, a buckle groove can be provided inside one end of the handle structure, and a buckle is provided on the outer edge of one end of the stress diffusion sleeve 303, and the buckle at one end of the stress diffusion sleeve 303 extends into the handle structure and enters into the buckle groove at one end of the handle structure.

[0035] Further, as a preferred embodiment, the bending adjustment component 2 includes a delivery tube 201, a slider 202 and a first limiting sleeve 203, the first limiting sleeve 203 is arranged in the handle structure, the slider 202 is slidably arranged in the first limiting sleeve 203, one end of the delivery tube 201 is connected to the slider 202, and the other end of the suction tube 101 passes through the slider 202 and the delivery tube 201, and extends out of the delivery tube 201; in the initial state, the conical mesh mouth 4 is contracted in the delivery tube 201, and the conical mesh mouth 4 is elastic and can be contracted. When the suction tube 101 is pulled backward, the conical mesh mouth 4 can enter the delivery tube 201.

[0036] A first notch is formed on the inner wall of the first limiting sleeve 203, and flat portions are formed on both sides of the slider 202, and the flat portions are formed in the first notch;

[0037] Slide grooves are provided on both sides of the first limiting sleeve 203, and external threads are provided on the outer peripheral wall of the slider 202, and the external threaded part of the slider 202 extends out of the slide grooves. The slider 202 can slide axially in the first limiting sleeve 203, thereby driving the conveying tube 201 to move axially, and the first notch is arranged along the axial direction of the first limiting sleeve 203. Through the cooperation between the flat position and the first notch, the slider 202 can be prevented from rotating, so that the slider 202 can only move in a straight line. A first positioning column is provided on both sides of one end of the limiting sleeve, and a first positioning groove is provided on both the upper shell 301 and the lower shell 302 of the handle. The first positioning column is arranged in the first positioning groove, so as to fix the position of the first limiting sleeve 203.

[0038] See also Figure 5 As shown, the interior of the slider 202 is hollow, and the suction tube 101 passes through the interior of the slider 202. A sealing ring 210 and a sealing ring cover 211 are provided inside the slider 202. The sealing ring 210 and the sealing ring cover 211 are both provided on the outer peripheral wall of the suction tube 101. The sealing ring 210 can be restricted inside the slider 202 by the sealing ring cover 211 to prevent the sealing ring 210 from falling off, and the sealing ring 210 can prevent the blood in the blood vessel from leaking from the slider 202.

[0039] Further, as a preferred embodiment, the bending adjustment component 2 further includes a knob 204, which is sleeved on the outside of the first limiting sleeve 203, and an inner thread is provided on the inner circumferential wall of the knob 204, and the inner thread matches the outer thread of the slider 202. The knob 204 is threadedly connected to the slider 202, and by rotating the knob 204, the knob 204 can drive the slider 202 to move axially in the first limiting sleeve 203. The axial movement of the slider 202 can drive the conveying tube 201 to move axially.

[0040] Further, as a preferred embodiment, a convex ring 205 is provided on the outer peripheral wall of the knob 204, and a second notch 206 is provided on both the handle upper shell 301 and the handle lower shell 302, and the convex ring 205 can extend out of the second notch 206. Figure 5 As shown, the convex ring 205 extends out of the second notch 206, and the convex ring 205 is arranged in a circular ring shape, which can drive the knob 204 to rotate, and the convex ring 205 and the knob 204 are integrally formed. The outer peripheral wall of the convex ring 205 is provided with anti-slip stripes for increasing friction and facilitating the rotation of the knob 204.

[0041] Furthermore, as a preferred embodiment, it further includes a second limiting sleeve 207 , which is disposed in the handle structure and located at one end of the knob 204 .

[0042] Further, as a preferred embodiment, it also includes a knob stopper 208, which is sleeved on the outer wall of the second stopper sleeve 207, and one end of the knob stopper 208 is provided with a latching tooth, and the outer wall of one end of the knob 204 is provided with a rack 209, and the latching tooth can be inserted into the rack 209. Figure 5 As shown, push rods 213 are further provided at the upper and lower ends of the knob limiter 208, and a third slot 212 is provided on both the handle upper shell 301 and the handle lower shell 302. The two push rods 213 on the knob limiter 208 extend out of the third slot 212. By pushing the push rods 213, the knob limiter 208 can be driven to move, so that the locking teeth on the knob limiter 208 contact or separate from the rack 209 on the knob 204.

[0043] Further, as a preferred embodiment, the catheter expansion mechanism includes a conical mesh port 4, which is arranged at the other end of the suction tube 101. The other end of the suction tube 101 is bonded or melted with the conical mesh port 4, and the conical mesh port 4 is coated with a heat-set metal material (which can be heat-set by nickel-titanium wire or laser-cut heat-set by nickel-titanium tube. The metal material guides the conical mesh port 4 to be deformed into a cone)

[0044] When in use, first extend the guide wire from the guide wire channel 103 into the suction tube 101, and then extend the suction tube 101. At this time, the guide wire can play a guiding role, facilitating the suction tube 101 and the delivery tube 201 to enter the blood vessel, and then push the delivery tube 201 and the suction tube 101 so that the suction tube 101 contacts the thrombus, and then withdraw the guide wire, and close the guide wire channel 103, and then the external negative pressure device is pneumatically operated to provide negative pressure, and the suction tube 101 can now suck out the thrombus in the blood vessel. When the suction tube 101 encounters the thrombus, When the thrombus cannot be contacted, the knob stopper 208 can be pushed forward so that the teeth on the knob stopper 208 are separated from the rack 209 on the knob 204. Then, by rotating the knob 204, the knob 204 drives the slider 202 to move forward or backward, and the slider 202 drives the delivery tube 201 to move forward or backward, changing the length of the suction tube 101 extending out of the delivery tube 201, so that the suction tube 101 automatically bends, thereby adjusting the bending radius of the other end of the suction tube 101, so that the other end of the suction tube 101 is adjusted to a suitable angle. Then pull back the knob stopper 208 so that the teeth enter the tooth groove of the rack 209, and lock the knob 204 to prevent the knob 204 from rotating, thereby locking the angle of the suction tube 101. If a thrombus is blocked in the channel of the suction tube 101, continue to provide negative pressure suction force, withdraw the suction tube 101, and pull the thrombus out of the body.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A thrombus aspiration catheter with adjustable bend and expandability, characterized in that: It includes a suction component, a bending adjustment component and a handle component. The suction component is arranged inside the handle component, and the bending adjustment component is arranged on the handle component. The suction component includes a suction tube and a tail handle arranged at one end of the suction tube. The bending adjustment component is used to control the bending of the other end of the suction tube. The other end of the suction tube has a catheter expansion mechanism for expanding the other end of the suction tube.

2. The adjustable bendable and expandable thrombus aspiration catheter according to claim 1, characterized in that: The tail handle is arranged in a "Y" shape, and has a guide wire channel and a suction channel connected to the inside of the suction tube.

3. The adjustable bendable and expandable thrombus aspiration catheter according to claim 1, characterized in that: The handle assembly comprises an upper handle shell and a lower handle shell, and the upper handle shell and the lower handle shell are mutually clamped to form a handle structure.

4. The adjustable bendable and expandable thrombus aspiration catheter according to claim 3, characterized in that: The handle assembly further comprises a stress diffusion sleeve, one end of the handle structure is provided with the stress diffusion sleeve, and the tail handle extends out from the other end of the handle structure.

5. The adjustable bendable and expandable thrombus aspiration catheter according to claim 3, characterized in that: The bending adjustment assembly includes a delivery pipe, a slider and a first limiting sleeve, wherein the first limiting sleeve is arranged in the handle structure, the slider is slidably arranged in the first limiting sleeve, one end of the delivery pipe is connected to the slider, and the other end of the suction pipe passes through the slider and the delivery pipe and extends out of the delivery pipe; A first notch is formed on the inner wall of the first limiting sleeve, and flat portions are formed on both sides of the sliding block, and the flat portions are arranged in the first notch; Slide grooves are formed on both sides of the first limiting sleeve, and external threads are formed on the outer peripheral wall of the sliding block. The external threaded portion of the sliding block extends out of the slide grooves.

6. The adjustable bendable and expandable thrombus aspiration catheter according to claim 5, characterized in that: The bending adjustment component also includes a knob, which is sleeved on the outside of the first limiting sleeve. An inner circumferential wall of the knob is provided with an internal thread, and the internal thread matches the external thread of the slider.

7. The adjustable bendable and expandable thrombus aspiration catheter according to claim 6, characterized in that: A convex ring is provided on the outer peripheral wall of the knob, and a second notch is provided on both the handle upper shell and the handle lower shell, and the convex ring can extend out of the second notch.

8. The adjustable bendable and expandable thrombus aspiration catheter according to claim 6, characterized in that: It also includes a second limiting sleeve, which is arranged in the handle structure and located at one end of the knob.

9. The adjustable bendable and expandable thrombus aspiration catheter according to claim 8, characterized in that: It also includes a knob limiter, which is sleeved on the outer circumferential wall of the second limiter sleeve, one end of the knob limiter is provided with a latch tooth, and the outer circumferential wall of one end of the knob is provided with a rack, and the latch tooth can be inserted into the rack.

10. The adjustable bendable and expandable thrombus aspiration catheter according to claim 1, characterized in that: The catheter expansion mechanism comprises a conical mesh opening, and the conical mesh opening is arranged at the other end of the suction tube.

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