Anti-embolism device in iliac artery lesion operation

Abstract

The utility model provides an anti-embolism device in an iliac artery lesion operation, which comprises a catheter, one end of the catheter is an outlet end, the other end of the catheter is an inlet end, a protective umbrella is arranged in the catheter and can stretch out from the outlet end to be opened or withdrawn to be stored, and the protective umbrella comprises an umbrella cover and a framework. The umbrella cover covers the framework, the umbrella cover is in a net shape after being unfolded, the end, away from the unfolded end, of the framework is connected with a guide wire, and the guide wire extends out of the inlet end. By means of the catheter capable of being guided into the normal side iliac artery blood vessel and the protection umbrella capable of stretching out or retracting relative to the catheter in the catheter, under the cooperation of the guide wire and the catheter, the protection umbrella is expanded in the blood vessel and anchored in the blood vessel to intercept thrombus or plaque, and the protection umbrella can be retracted into the catheter after an operation is completed and is convenient to take out.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to an anti-embolism device in iliac artery disease surgery. Background Art

[0002] Aortoiliac artery occlusive lesions are mostly characterized by focal, multi-segmental or bilateral lesions. The treatment is mainly based on pre-dilation of the lesions by balloon dilatation followed by stent placement. For lesions involving one common iliac artery, the treatment is relatively simple, but there is a risk of unstable plaque or thrombus extrusion and detachment during pre-dilatation or stent release, leading to the risk of contralateral embolism, especially for those with lesions involving the common iliac artery near the opening. Clinically, bilateral kissing balloon dilatation is often used to reduce the risk of contralateral embolism. The synchronization requirements for balloon dilatation and release are high. In addition, there is still a risk of contralateral embolism caused by plaque or thrombus extrusion and detachment after the balloon is completely released or when the stent is placed. For this reason, we have designed a healthy side embolic protection device for this type of lesion to reduce the incidence of contralateral embolism during surgery for common iliac artery lesions. Utility Model Content

[0003] In order to solve the above problems, the purpose of the utility model is to provide an anti-embolism device during iliac artery disease surgery, which is introduced into the healthy iliac artery through a catheter, and is provided with a protective umbrella that can be extended, expanded or retracted relative to the catheter. With the cooperation of the guide wire and the catheter, the protective umbrella can be expanded in the blood vessel and anchored in the blood vessel to intercept thrombus or plaque. After the operation is completed, the protective umbrella can be retracted into the catheter for easy removal.

[0004] The utility model is realized by the following method: an anti-embolism device in iliac artery disease surgery comprises a catheter, one end of which is an outlet end, and the other end of which is an inlet end. A protective umbrella which can be extended from the outlet end to be opened or retracted is arranged in the catheter, and the protective umbrella comprises an umbrella surface and a frame, the umbrella surface covers the frame, and the umbrella surface is mesh-shaped after being opened, and the end of the frame away from the opening is connected with a guide wire, and the guide wire extends from the inlet end.

[0005] Preferably, the frame includes an annular fixing seat and a plurality of ribs, the plurality of ribs are fixed on the fixing seat in an intermittent manner, and the corresponding parts on the umbrella surface are fixed to the corresponding ribs and fixing seat.

[0006] Preferably, the number of the ribs is 6-10.

[0007] Preferably, the umbrella ribs are made of elastic material, and when the plurality of umbrella ribs are not restricted by the conduit, they are reset to move away from each other by their own force, so as to realize the expansion of the umbrella cover covering the frame.

[0008] Preferably, a recovery hook is provided on the fixing seat at one side facing the inlet end, and the recovery hook is connected to the guide wire.

[0009] Preferably, each of the umbrella ribs is provided with a positioning portion, and a thread is wound between the umbrella surface and the corresponding positioning portion for fixing the umbrella surface and the umbrella ribs.

[0010] Preferably, the rib is in a two-section structure, and the connection between the two sections of the rib forms an obtuse angle toward the center line of the fixing seat.

[0011] Preferably, the size of the portion of the conduit close to the outlet end gradually decreases from away from the outlet end to closer to the outlet end.

[0012] The beneficial effects of the utility model are: the utility model provides an anti-embolism device in iliac artery disease surgery. Compared with the prior art, the utility model has at least the following technical effects: 1. Through the catheter that can be introduced into the healthy iliac artery blood vessel, a protective umbrella that can be extended, expanded or retracted relative to the catheter is arranged in the catheter. Under the cooperation of the guide wire and the catheter, the protective umbrella is opened in the blood vessel and anchored in the blood vessel to intercept thrombus or plaque. After the operation is completed, the protective umbrella can be retracted into the catheter for easy removal. 2. The umbrella ribs are fixed to the fixing seat. Through the elasticity of the umbrella ribs themselves, the umbrella surface can be automatically unfolded to intercept the potential thrombus or hardened plaque that falls off from the opposite affected area. 3. A recovery hook is arranged on the fixing seat of the umbrella ribs to facilitate connection with the guide wire, so that the guide wire can pull the skeleton back into the catheter, so that the anti-embolism device can be taken out. 4. The outlet end of the catheter is designed to be a small end to prevent the skeleton from automatically falling out of the catheter without external force intervention, thereby avoiding misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The utility model is a schematic diagram of a state in which an anti-embolism device in an iliac artery disease operation is completely opened.

[0014] Figure 2 The utility model is a schematic diagram of a state in which the protective umbrella part of the anti-embolism device in iliac artery disease surgery is retracted into the catheter.

[0015] Figure 3 The utility model is a schematic diagram of a state in which the protective umbrella of the anti-embolism device in iliac artery disease surgery is completely retracted into the catheter.

[0016] Figure 4 It is a schematic diagram of the unfolded state of the protective umbrella of the utility model.

[0017] Figure 5 It is a front view of the skeleton of the protective umbrella of the utility model.

[0018] Figure 6It is a schematic diagram of the frame of the protective umbrella of the utility model viewed from the end far away from the fixed end.

[0019] Description of the accompanying drawings: 1-catheter, 2-protective umbrella, 21-umbrella surface, 22-frame, 221-fixing seat, 222-umbrella rib, 3-guide wire. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] See also Figures 1 to 6 , an anti-embolism device in iliac artery disease surgery, comprising a catheter 1, one end of the catheter 1 is an outlet end, the other end of the catheter 1 is an inlet end, the catheter 1 is provided with a protective umbrella 2 that can be extended from the outlet end to be opened or retracted, the protective umbrella 2 comprises an umbrella cover 21 and a frame 22, the umbrella cover 21 covers the frame 22, the umbrella cover 21 is meshed after being opened, the end of the frame away from the opening is connected with a guide wire 3, the guide wire 3 extends from the inlet end. Through the catheter 1 that can be introduced into the healthy iliac artery blood vessel, and the protective umbrella 2 that can be extended, expanded or retracted relative to the catheter 1 is provided therein, the protective umbrella 2 is opened in the blood vessel and anchored in the blood vessel to intercept thrombus or plaque under the cooperation of the guide wire 3 and the catheter 1, and the protective umbrella 2 can be retracted into the catheter 1 after the operation is completed, so as to facilitate removal. The meshed umbrella cover 21 can not only effectively intercept the detached plaque or thrombus, but also ensure the passage of blood flow, and avoid ischemia of the healthy lower limb caused by long-term blockage.

[0022] See also Figures 1 to 6 Preferably, the frame 22 includes an annular fixing seat 221 and a plurality of ribs 222, wherein the plurality of ribs 222 are fixed to the fixing seat 221 at intervals, and the corresponding parts on the umbrella surface 21 are fixed to the corresponding ribs 222 and the fixing seat 221. The ribs 222 are installed on the annular fixing seat 221 so that the frame 22 can evenly open the umbrella surface 21 and completely cover the healthy iliac artery.

[0023] See also Figures 1 to 6 Preferably, the number of ribs 222 is 6-10. A greater number of ribs can make the umbrella surface 21 open more evenly and fit the inner wall of the blood vessel more closely. Preferably, the number of ribs 222 is 8.

[0024] See also Figures 1 to 6Preferably, the ribs 222 are made of elastic material, and when the ribs 222 are not restricted by the catheter 1, they are reset by their own force and move away from each other, so as to realize the expansion of the umbrella cover 21 covering the frame 22. The ribs 222 are fixed to the fixing seat 221, and the umbrella cover 21 can be automatically expanded to intercept the thrombus in the opposite affected area through the elasticity of the ribs 222 themselves after they are pushed out of the catheter 1. The elastic material can be a memory metal, or a plastic such as polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polytetrafluoroethylene (PTFE), thermoplastic polyurethane (TPU), polycarbonate (PC), polyester (PET), etc., but is not limited thereto.

[0025] See also Figures 1 to 3 , Figure 5 Preferably, a retrieval hook is provided on one side of the fixing seat 221 facing the inlet end, and the retrieval hook is connected to the guide wire 3. It is convenient to connect with the guide wire 3, and then the guide wire 3 is convenient to pull the skeleton 22 back into the catheter 1, so as to facilitate the removal of the anti-embolism device.

[0026] See also Figures 1 to 3 Preferably, the size of the portion of the conduit 1 near the outlet end gradually decreases from the direction away from the outlet end to the direction close to the outlet end. The outlet end of the conduit 1 is designed to be a small end to prevent the frame 22 from automatically falling out of the conduit 1 without external force intervention, thereby avoiding fixing the device to an undesired position.

[0027] See also Figures 1 to 6 Preferably, each rib 222 is provided with a positioning portion (not shown, see the connection method between the umbrella cover and the frame of the existing umbrella), and a thread is wound between the umbrella cover 21 and the corresponding positioning portion to fix the umbrella cover 21 and the rib 222. This allows the umbrella cover 21 to be expanded as the rib 222 is expanded, and to be retracted as the rib 222 is retracted.

[0028] See also Figures 1 to 6 Preferably, the rib 222 is a two-section structure, and the connection between the two sections of the rib 222 forms an obtuse angle a toward the center line of the fixing seat 221. This facilitates the rib 222 to move closer to each other at one end away from the fixing seat 221 during the process of retracting the rib 222 into the catheter 1, thereby driving the side of the umbrella surface 21 away from the fixing seat 221 to move closer to each other, thereby wrapping the thrombus or plaque therein. The preferred obtuse angle a can be 120° to 160°, such as 125°, 134°, 146°, 157°, etc., but is not limited thereto.

[0029] The utility model has the following working principle:

[0030] 1: Puncture the femoral artery on the affected side and place the sheath. After the guidewire passes through the lesion, leave the guidewire in place for standby use.

[0031] 2: Puncture the healthy femoral artery and place the sheath to introduce the anti-thrombotic device. After the device reaches the target position, withdraw the catheter 1, and then the frame 22 and the umbrella 21 are ejected from the catheter 1 and fully released and deployed; the guide wire 3 is fixed by the right hand, and the catheter 1 is controlled by the left hand to make the catheter 1 withdraw along the guide wire 3. As the catheter 1 withdraws, the right hand that fixes the guide wire 3 moves synchronously to the tail end of the guide wire until the protective umbrella is completely released;

[0032] 3: The next step is balloon dilatation and stent placement on the affected side, and angiography is performed to confirm the treatment effect on the affected side. After the treatment on the affected side is completed, the guide wire 3 is fixed by the right hand, and the catheter 1 is advanced along the guide wire 3, and then the skeleton 22 is recovered into the catheter 1, that is, the entire umbrella 21 is retracted back into the catheter 1, and then the anti-thrombotic device is withdrawn from the body as a whole, and angiography is performed to confirm the blood flow on the healthy side;

[0033] 4: withdraw the catheter 1 from the body, release the frame 22 and the umbrella 21 again, and check whether there are plaques or thrombus-like substances in the umbrella 21;

[0034] 5: Seal the bilateral femoral artery puncture points.

[0035] Several points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, and can be mechanical or electrical connections, or internal connectivity between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may change.

[0036] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the usual design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0037] Finally, the above is only a preferred implementation of the present utility model, and the protection scope of the present utility model is not limited to the above embodiments. All technical solutions under the concept of the present utility model belong to the protection scope of the present utility model.

[0038] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications without departing from the principle of the utility model should also be regarded as within the protection scope of the utility model.

Claims

1. An anti-embolism device for iliac artery disease surgery, characterized in that: The invention comprises a catheter, one end of which is an outlet end, and the other end of which is an inlet end. A protective umbrella which can be extended from the outlet end to be opened or retracted is arranged in the catheter. The protective umbrella comprises an umbrella surface and a frame. The umbrella surface covers the frame. The umbrella surface is net-shaped when opened. A guide wire is connected to the end of the frame away from the opening, and the guide wire extends from the inlet end.

2. The device for preventing embolism during iliac artery disease surgery according to claim 1, characterized in that: The frame comprises an annular fixing seat and a plurality of ribs, wherein the plurality of ribs are fixed on the fixing seat in an intermittent manner, and the corresponding parts on the umbrella surface are fixed to the corresponding ribs and the fixing seat.

3. The device for preventing embolism during iliac artery disease surgery according to claim 2, characterized in that: The number of the umbrella ribs is 6 to 10.

4. The device for preventing embolism during iliac artery disease surgery according to claim 2, characterized in that: The umbrella ribs are made of elastic material. When the plurality of umbrella ribs are not restricted by the conduit, they are reset to move away from each other by their own force, so as to realize the expansion of the umbrella surface covered on the frame.

5. The device for preventing embolism during iliac artery disease surgery according to claim 2, characterized in that: A recovery hook is provided on the fixing seat at one side facing the inlet end, and the recovery hook is connected to the guide wire.

6. The device for preventing embolism during iliac artery disease surgery according to claim 2, characterized in that: Each of the umbrella ribs is provided with a positioning portion, and a thread is wound between the umbrella surface and the corresponding positioning portion to fix the umbrella surface and the umbrella ribs.

7. The device for preventing embolism during iliac artery disease surgery according to claim 2, characterized in that: The rib is in a two-section structure, and the connection between the two sections of the rib forms an obtuse angle toward the center line of the fixing seat.

8. The device for preventing embolism during iliac artery disease surgery according to claim 1, characterized in that: The size of the portion of the conduit close to the outlet end gradually decreases from away from the outlet end to close to the outlet end.

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