Aortic true and false lumen fusion device and assembly

Abstract

The present invention discloses a device and assembly for fusion of the true and false aortic lumens, belonging to the field of medical device technology. The device comprises a fusion catheter and a drive mechanism. The fusion catheter is provided with a first lumen and a second lumen. The proximal sidewall of the second lumen is provided with a knife exit, a cleavage knife hingedly connected to the knife exit, and a drive mechanism for rotating the cleavage knife. The sidewall of the second lumen is provided with a guide hole. The assembly comprises a guidewire superselection device and the aforementioned aortic true and false lumen fusion device. The guidewire superselection device comprises a magnetic head, a hose, a handle, and a drifting umbrella. The magnetic head is provided with a guidewire hole, which is connected to the hose. The hose has a hollow interlayer in its wall. The handle is provided with a guidewire lumen and an injection lumen, which is connected to the distal lumen of the hose. The injection lumen is connected to the hollow interlayer. The drifting umbrella is mounted and fixed on the proximal outer wall of the hose. The device can effectively incise the intima and media, and the incision is smooth. The patient's vascular lining recovers quickly without causing the dislodgment of mural thrombi.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an aortic true and false lumen fusion device and assembly. Background Art

[0002] The aortic wall is composed of three layers: the intima, the media, and the adventitia. Aortic dissection is formed when blood flow impacts the aortic intima, forming a proximal rupture. Blood flows from the proximal rupture into the space between the media and the adventitia, and continues to extend between the media and the adventitia, forming a rupture at the distal end. Blood flows out from the distal rupture, and blood continues to perfuse, forming an aortic dissection (false lumen). Continuous perfusion of blood into the false lumen causes the false lumen to gradually enlarge and squeeze the true lumen of the aorta. The true lumen is poorly perfused, and the pressure between the true and false lumens is unbalanced, eventually leading to dissection rupture and the patient's death from blood loss. In recent years, some scholars have proposed that the problem of poor true lumen perfusion, which ultimately leads to dissection rupture, can be solved by cutting the intima and media and fusing the true and false lumens. However, there is currently no product on the market that can effectively fuse the true and false lumens. Summary of the Invention

[0003] The purpose of the present invention is to solve the above-mentioned technical problems and provide an aortic true and false lumen fusion device and assembly, which can effectively cut the intima and media, and the incision is smooth. The patient's blood vessel inner wall recovers quickly, and will not cause the attached thrombus to fall off, thereby avoiding the risk of stroke, cerebral infarction, etc. in the patient.

[0004] To achieve the above-mentioned objectives, the present invention provides the following scheme: The present invention discloses an aortic true and false lumen fusion device, comprising a fusion catheter and a driving mechanism; a first lumen and a second lumen arranged side by side are provided in the fusion catheter, the proximal end of the first lumen is used for the tail end of the guide wire to pass through, and the distal end of the first lumen is used for the tail end of the guide wire to pass through, a knife outlet is provided on the proximal side wall of the second lumen, a cutting knife is hinged on the knife outlet, the cutting knife can be rotated inwardly into the second lumen and outwardly out of the knife outlet, the driving mechanism is used to drive the cutting knife to rotate, a guide hole is provided on the side wall of the second lumen between the distal end and the knife outlet, the guide hole is used for the head end of the guide wire to pass through the second lumen, and the distal end of the second lumen is used for the head end of the guide wire to pass through.

[0005] Preferably, the driving mechanism includes a slider, a push-pull rod and a transmission rod, the slider is slidably connected in the second cavity, the proximal end of the push-pull rod is connected to the distal end of the slider, the distal end of the push-pull rod extends out of the distal end of the second cavity, one end of the transmission rod is hinged to the proximal end of the slider, the other end of the transmission rod is hinged to the proximal end of the cutting knife, and the distal end of the cutting knife is hinged to the proximal end of the knife outlet.

[0006] Preferably, a hinge groove is provided on a side of the proximal end of the sliding block away from the knife outlet, and the distal end of the transmission rod is hinged in the hinge groove.

[0007] Preferably, the cutting knife is a quadrangular pyramid, the bottom surface of the quadrangular pyramid is a rectangle with a longer side than a wider side, the two ends of the long side of the rectangle are the proximal end and the distal end of the cutting knife respectively, and the tip of the quadrangular pyramid is the cutting part of the cutting knife.

[0008] Preferably, a plurality of guide holes are provided on the side wall of the second cavity, and the plurality of guide holes are spaced apart along the axial direction of the second cavity.

[0009] Preferably, the guide hole is an inclined hole arranged obliquely toward the distal end of the second cavity.

[0010] Preferably, a partition is provided in the fusion catheter, and the partition divides the second cavity into a first channel and a second channel. The knife exit is located on the first channel, and the guide hole is located on the second channel.

[0011] The present invention also discloses an aortic true and false lumen fusion component, including a guidewire superselection device and the above-mentioned aortic true and false lumen fusion device, the guidewire superselection device including a magnetic head, a hose, a handle and a retractable drifting umbrella, the magnetic head is provided with a guidewire hole, the guidewire hole is connected to the proximal end of the lumen of the hose, the hose wall is provided with a hollow interlayer, the handle is provided with a guidewire cavity and an injection cavity, the guidewire cavity is connected to the distal end of the lumen of the hose, the injection cavity is connected to the hollow interlayer, and the drifting umbrella is sleeved and fixed on the proximal outer wall of the hose.

[0012] Preferably, the drifting umbrella includes ribs made of elastic alloy and an umbrella cover made of soft film.

[0013] Preferably, the handle is provided with an injection connector connected to the injection cavity.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The cutting knife of the aortic true and false lumen fusion device in the present invention can effectively cut the intima and the media, and the incision is smooth. The patient's blood vessel inner wall recovers quickly, and will not cause the thrombus attached to the wall to fall off, thereby avoiding the risk of stroke, cerebral infarction, etc. in the patient. In addition, the cutting knife can be hidden when pushing and removing, which can avoid cutting the blood vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the analysis of these drawings without paying any creative work.

[0017] Figure 1 Schematic diagram of the cross-sectional structure of the aortic true and false lumen fusion device in an embodiment of the present invention;

[0018] Figure 2 Schematic diagram of the cross-sectional structure of the aortic true and false lumen fusion device in an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the structure of the aortic true and false lumen fusion device in the embodiment of the present invention when the cutting knife is stored;

[0020] Figure 4 Schematic diagram of the structure of the aortic true and false lumen fusion device when the cutting knife is rotated out in an embodiment of the present invention;

[0021] Figure 5 This is a schematic cross-sectional view of the guide hole of the aortic true and false lumen fusion device according to an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the cross-sectional structure of the aortic true and false lumen fusion device (including the first channel and the second channel) in an embodiment of the present invention;

[0023] Figure 7 Schematic diagram of the structure of the guidewire superselection device in an embodiment of the present invention;

[0024] Figure 8 Schematic diagram of the structure of the proximal end of the guidewire superselection device in an embodiment of the present invention;

[0025] Figure 9 Schematic diagram of the cross-sectional structure of the proximal end of the guidewire superselection device in an embodiment of the present invention;

[0026] Figure 10 Schematic diagram of the cross-sectional structure of the distal end of the guidewire superselection device in an embodiment of the present invention;

[0027] Figure 11 Schematic diagram of the process of placing a guidewire under the proximal aortic rupture in an embodiment of the present invention;

[0028] Figure 12 Schematic diagram of the process of the lower guide wire superselection device in an embodiment of the present invention;

[0029] Figure 13This is a schematic diagram of the process of leading the distal end rupture from the proximal end of the guidewire superselection device in an embodiment of the present invention;

[0030] Figure 14 Schematic diagram of the process of leading the distal end of the guide wire tip out of the distal end rupture in an embodiment of the present invention;

[0031] Figure 15 Schematic diagram of the process of the lower aorta true and false lumen fusion device in an embodiment of the present invention;

[0032] Figure 16 Schematic diagram of the process of cutting the intima and media by the aortic true and false lumen fusion device in an embodiment of the present invention;

[0033] Figure 17 Schematic diagram of the aorta structure with fusion of true and false lumens in an embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Fusion catheter; 2. Splitting knife; 3. Drive mechanism; 4. Magnetic head; 5. Hose; 6. Handle; 7. Drifting parachute; 8. Guidewire; 9. Superselective catheter;

[0036] 11. First cavity; 12. Second cavity; 13. Cutting edge; 14. Guide hole;

[0037] 121, first channel; 122, second channel;

[0038] 31. Slider; 32. Push-pull rod; 33. Transmission rod; 34. Hinge slot;

[0039] 41. Guide wire hole;

[0040] 51, lumen; 52, hollow interlayer;

[0041] 61. Guidewire lumen; 62. Injection lumen; 63. Injection connector;

[0042] 71. Umbrella ribs; 72. Umbrella canopy;

[0043] 100. Hybrid membrane; 200. Outer membrane; 300. Proximal rupture; 400. Distal rupture; 500. Magnetic capture device. DETAILED DESCRIPTION

[0044] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments analyzed and obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0045] The purpose of the present invention is to provide an aortic true and false lumen fusion device and assembly to solve the problems existing in the prior art. The intima and media can be effectively cut by a cutting knife, and the incision is smooth. The patient's blood vessel inner wall recovers quickly, and the attached thrombus will not fall off, thereby avoiding the risk of stroke, cerebral infarction, etc. in the patient. In addition, the cutting knife can be hidden when pushing and removing, which can avoid cutting the blood vessels.

[0046] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Example 1

[0048] like Figures 1 to 17 As shown, this embodiment provides an aortic true and false lumen fusion device, comprising a fusion catheter 1, a cleavage knife 2, and a drive mechanism 3. A first lumen 11 and a second lumen 12 are provided in the fusion catheter 1. The first lumen 11 and the second lumen 12 are arranged side by side. The first lumen 11 and the second lumen 12 both extend along the central axis of the fusion catheter 1. Preferably, the first lumen 11 is coaxially arranged with the central axis of the fusion catheter 1, and the second lumen 12 is located beside the first lumen 11. The proximal end of the first lumen 11 is used for the tail end of the guide wire 8 to pass through, and the distal end of the first lumen 11 is used for the tail end of the guide wire 8 to pass through. A knife outlet 13 is provided on the proximal side wall of the second lumen 12. The cleavage knife 2 is hinged at the knife outlet 13. The cleavage knife 2 can be rotated inward into the second lumen 12 or rotated outward from the knife outlet 13. The drive mechanism 3 is used to drive the cleavage knife 2 to rotate, that is, to drive the cleavage knife 2 to rotate inward or outward. A guide hole 14 is further provided on the side wall of the second lumen 12, and the guide hole 14 is located between the distal end of the second lumen 12 and the knife exit 13. The guide hole 14 is used for the tip of the guide wire 8 to pass into the second lumen 12, and the distal end of the second lumen 12 is used for the tip of the guide wire 8 to pass out.

[0049] Note: The proximal end mentioned in the text refers to the end close to the patient, and the distal end refers to the end close to the operator (far from the patient).

[0050] Working principle:

[0051] First, the guide wire 8 is superselected so that the tip of the guide wire 8 enters the false lumen, i.e., between the mixed membrane 100 (intima and media) and the adventitia 200, from the proximal rupture 300 of the aorta, and then extends into the true lumen from the distal rupture 400 of the aorta. At this time, the guide wire 8 is annularly sleeved on the mixed membrane 100 (intima and media) between the proximal rupture 300 and the distal rupture 400. Figure 14 As shown;

[0052] Then, the tail end of the guide wire 8 is inserted into the proximal end of the first lumen 11 of the fusion catheter 1, and then comes out from the distal end of the first lumen 11, so that the fusion catheter 1 is sleeved on the guide wire 8, and the head end of the guide wire 8 is inserted into the guide hole 14 of the fusion catheter 1, and comes out from the distal end of the second lumen 12, so that the aortic true and false lumen fusion device is completely sleeved on the guide wire 8, the head and tail ends of the guide wire 8 are pulled closer, and the fusion catheter 1 is pushed toward the proximal rupture 300 of the aorta until the outlet edge 13 of the fusion catheter 1 reaches the proximal rupture 300, and the fusion catheter 1 is close to the intima of the hybrid membrane 100. Figure 15 As shown;

[0053] Then, push the push-pull rod 32 forward, and the cutting knife 2 extends out of the cutting edge 13. Figure 16 As shown, the push-pull rod 32 is locked to prevent the cutting knife 2 from being retracted. After locking the push-pull rod 32, the head and tail ends of the guide wire 8 are tightened and the fusion device is pulled outward together. The cutting knife 2 will cut the mixed membrane 100 (intima and media) of the aorta, so that the true lumen and the false lumen are fused. Figure 17 As shown; the locking of the push-pull rod 32 can be achieved by holding the push-pull rod 32 to maintain the relative position of the push-pull rod 32 and the fusion catheter 1, or by sticking the push-pull rod 32 on the fusion catheter 1 with medical tape, or by providing two corresponding locking holes at the distal end of the fusion catheter 1, and providing a knife-retracting positioning hole and a knife-out positioning hole on the push-pull rod 32, wherein the knife-out positioning hole can be aligned with the two locking holes after the cutting knife 2 extends out of the knife outlet 13, at this time, the pin is inserted into the knife-out positioning hole and the two locking holes, so that the push-pull rod 32 and the fusion catheter 1 can be locked, and when the cutting knife 2 is retracted into the second cavity 12, the knife-retracting positioning hole can be aligned with the two locking holes, and the pin is inserted into the knife-retracting positioning hole and the two locking holes, so that the push-pull rod 32 and the fusion catheter 1 can be locked;

[0054] Finally, the push-pull rod 32 is pulled back, the laceration blade 2 is retracted into the second lumen 12, and the distal end of the fusion catheter 1 is pulled out. During this process, the push-pull rod 32 can also be locked (see the previous step for the locking method) to prevent the laceration blade 2 from protruding, and then the guide wire 8 is withdrawn. The above step sequence and operation process are for reference only and can be adjusted according to actual conditions.

[0055] Because the thickness of the aortic intima is between 100 μm and 130 μm and is composed of endothelial cells, and the thickness of the tunica media is approximately 500 μm and is composed of elastin, collagen fibers, and smooth muscle, it is difficult to directly pull the tip and tail ends of the guidewire 8 to cut the mixed membrane 100 composed of the intima and media. Even if successful, the ruptured surface will be rough, healing will be slow, and there is a risk of detachment of mural thrombi. However, the present aortic true and false lumen fusion device uses a cleavage knife 2 to effectively cut the intima and media, and the incision is smooth, the patient's vascular wall recovers quickly, and mural thrombi will not be detached, thus avoiding the risk of stroke, cerebral infarction, etc. In addition, the cleavage knife 2 can be hidden during insertion and removal to avoid injuring the blood vessels.

[0056] In one embodiment, the drive mechanism 3 includes a slider 31, a push-pull rod 32, and a transmission rod 33. The slider 31 is slidably connected within the second lumen 12. The proximal end of the push-pull rod 32 is connected to the distal end of the slider 31, and the distal end of the push-pull rod 32 extends beyond the distal end of the second lumen 12. One end of the transmission rod 33 is hinged to the proximal end of the slider 31, and the other end of the transmission rod 33 is hinged to the proximal end of the cleavage knife 2, which is hinged to the proximal end of the blade 13. When the push-pull rod 32 is pushed toward the proximal end of the second lumen 12, the slider 31 slides toward the proximal end of the second lumen 12, thereby driving the transmission rod 33 to push the proximal end of the cleavage knife 2 outward. The proximal end of the cleavage knife 2 rotates around the distal end, thereby rotating out of the second lumen 12 and the blade 13, causing the cutting portion of the cleavage knife 2 to extend beyond the blade 13. Specifically, the distal end of the cutting knife 2 is hinged to the proximal end of the cutting edge 13 through a first hinge axis, and the proximal end of the cutting knife 2 is hinged to the proximal end of the push-pull rod 32 through a second hinge axis. The first hinge axis and the second hinge axis are parallel to each other, and at the same time, the first hinge axis and the second hinge axis are both perpendicular to the central axis of the fusion catheter 1.

[0057] In one embodiment, a hinge groove 34 is provided on a side of the proximal end of the slider 31 away from the blade outlet 13, and the distal end of the transmission rod 33 is hinged in the hinge groove 34. Preferably, the hinge groove 34 is an arc-shaped groove.

[0058] In one embodiment, the cutting knife 2 is a quadrangular pyramid, the bottom surface of the quadrangular pyramid is a rectangle with a longer side than a wider side, the two ends of the long side of the rectangle are the proximal end and the distal end of the cutting knife 2, respectively, and the tip of the quadrangular pyramid is the cutting part of the cutting knife 2. The tip of the quadrangular pyramid can be used to cut the mixed film 100 (endothelium and tumour membrane).

[0059] In one embodiment, the second cavity 12 is a circular cavity, and the slider 31 is a cylindrical slider. The cylindrical slider is sleeved in the circular cavity, and the outer wall of the cylindrical slider fits with the inner wall of the circular cavity to achieve a sliding connection between the slider 31 and the second cavity 12.

[0060] In one embodiment, a plurality of guide holes 14 are provided on the side wall of the second lumen 12. The plurality of guide holes 14 are spaced apart along the axis of the second lumen 12. The tip of the guide wire 8 can be inserted into whichever guide hole 14 as needed.

[0061] In one embodiment, the guide hole 14 is an inclined hole inclined toward the distal end of the second lumen 12 , so that the tip of the guide wire 8 can be inserted into the guide hole 14 and then extended toward the distal end of the second lumen 12 .

[0062] In one embodiment, a partition is provided within the fusion catheter 1, which divides the second lumen 12 into a first channel 121 and a second channel 122. The blade 13 is located on the first channel 121, the drive mechanism 3 is located within the first channel 121, and the guide hole 14 is located on the second channel 122. Dividing the second lumen 12 into the first channel 121 and the second channel 122 prevents interference between the guidewire 8 and the push-pull rod 32.

[0063] Example 2

[0064] like Figures 1 to 17 As shown, this embodiment provides an aortic true and false lumen fusion assembly, including a guidewire superselection device and the aortic true and false lumen fusion device in Example 1. The guidewire superselection device includes a magnetic head 4, a hose 5, a handle 6, and a drifting umbrella 7. The magnetic head 4 is provided with a guidewire hole 41, which is connected to the proximal end of the lumen 51 of the hose 5. The magnetic head 4 is made of a permanent magnetic material. A hollow interlayer 52 is provided on the wall of the hose 5. A guidewire lumen 61 and an injection lumen 62 are provided in the handle 6. The guidewire lumen 61 is connected to the distal end of the lumen 51 of the hose 5. The injection lumen 62 is connected to the hollow interlayer 52 and is used to inject and discharge liquid into and out of the hollow interlayer 52, thereby pressurizing and depressurizing the hose 5. The drifting umbrella 7 is sleeved and fixed on the proximal outer wall of the hose 5, with the small diameter end of the drifting umbrella 7 facing the magnetic head 4, and the drifting umbrella 7 can be retracted and extended.

[0065] Working principle:

[0066] Step 1: Use the elbow catheter to guide the tip of the guide wire 8 into the false lumen through the proximal rupture 300 of the aorta, and withdraw the elbow catheter. Figure 11 As shown;

[0067] Step 2: A superselection catheter 9 is set on the guide wire 8, and the proximal end of the superselection catheter 9 is introduced into the false lumen through the proximal rupture 300 of the aorta, and the tail end of the guide wire 8 is passed through the inner hole of the guide wire superselection device (the guide wire hole 41, the lumen 51 and the guide wire cavity 61), so that the guide wire superselection device is located between the guide wire 8 and the superselection catheter 9, and liquid is injected into the hollow interlayer 52 through the injection cavity 62 to pressurize the hose 5. The handle 6 is held and pushed forward to make the magnetic head 4 and the drifting umbrella 7 extend out of the head end of the superselection catheter 9, and the drifting umbrella 7 opens. Figure 12 As shown;

[0068] Step 3: Unload the hose 5. The drifting umbrella 7 will drive the proximal end of the hose 5 to drift toward the distal rupture 400 of the aorta under the impact of the blood flow in the false lumen. Then, the magnetic capture device 500 will attract the magnetic head 4 to push the proximal end of the hose 5 into the true lumen from the distal rupture 400. Figure 13 As shown;

[0069] Step 4: Pressurize the hose 5 again and push the guide wire 8 so that the head end of the guide wire 8 extends out of the guide wire hole 41 of the magnetic head 4. After the head end and the tail end of the guide wire 8 are merged, pull back the handle 6 to take out the guide wire superselection device. At this time, the guide wire 8 is set on the mixed membrane 100 between the proximal rupture 300 and the distal rupture 400. Figure 14 As shown;

[0070] Step 5: Insert the tail end of the guide wire 8 into the proximal end of the first lumen 11 of the fusion catheter 1, and then pass it out from the distal end of the first lumen 11, so that the fusion catheter 1 is sleeved on the guide wire 8, and insert the head end of the guide wire 8 into the guide hole 14 of the fusion catheter 1, and pass it out from the distal end of the second lumen 12, so that the aortic true and false lumen fusion device is completely sleeved on the guide wire 8, pull the head and tail ends of the guide wire 8 closer, and push the fusion catheter 1 toward the proximal rupture 300 of the aorta until the outlet edge 13 of the fusion catheter 1 reaches the proximal rupture 300, and the fusion catheter 1 is close to the intima of the hybrid membrane 100. Figure 15 As shown;

[0071] Step 6: Push the push-pull rod 32 forward, and the cutting knife 2 will extend out of the cutting edge 13. Figure 16 , lock the push-pull rod 32 to prevent the cutting knife 2 from being retracted. The push-pull rod 32 can be kept in relative position with the fusion catheter 1 by hand, or the push-pull rod 32 can be glued to the fusion catheter 1 with medical tape. Of course, other methods can also be used. After locking the push-pull rod 32, tighten the head and tail ends of the guide wire 8 and pull the fusion device outward together. The cutting knife 2 will cut the mixed membrane 100 (intima and media) of the aorta, so that the true lumen and the false lumen are fused. Figure 17 As shown;

[0072] Step 7: Pull back the push-pull rod 32, retract the cutting knife 2 into the second cavity 12, pull the distal end of the fusion catheter 1, and pull out the fusion catheter 1. During this process, the push-pull rod 32 can also be locked to prevent the cutting knife 2 from protruding, and then withdraw the guide wire 8.

[0073] The above step sequence and operation process are for reference only and can be adjusted according to actual conditions.

[0074] This aortic true and false lumen fusion component has the following advantages:

[0075] ① Pressurizing the hose 5 can make the tube wall firm, so that the guidewire superselection device can be pushed in the superselection catheter 9. The inner hole of the guidewire superselection device (the guidewire hole 41, the tube cavity 51 and the guidewire cavity 61) can pass the guidewire 8. The pressure relief of the hose 5 can make the tube soft and light, so that it can drift with the drifting umbrella 7. The magnetic head 4 can be used to make the proximal end of the hose 5 pass through under the attraction of the magnetic capture device 500, thereby easily establishing a guidewire passage from the proximal breach 300 to the distal breach 400, solving the problem of the existing superselection technology that after the guidewire 8 enters the proximal breach 300, it is difficult to accurately pass through the distal breach 400 at a larger folding angle (close to 180°).

[0076] ② With the help of the hemodynamics of the false lumen, the drifting umbrella 7 drifts toward the distal rupture 400, eliminating the tedious step of superselecting the guidewire in the false lumen.

[0077] ③The aortic true and false lumen fusion device can cut the intima and media smoothly, and the patient's blood vessel inner wall recovers quickly without causing the detachment of mural thrombus, thus avoiding the risk of stroke, cerebral infarction, etc.

[0078] In one embodiment, the drifting umbrella 7 includes ribs 71 made of elastic alloy and an umbrella cover 72 made of soft film. The ribs 71 made of elastic alloy can automatically return to their original shape after being compressed, thereby realizing the folding and unfolding of the umbrella cover 72 made of soft film.

[0079] In one embodiment, a liquid injection connector 63 is provided on the handle 6 , and the liquid injection connector 63 is connected to the liquid injection cavity 62 .

[0080] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A true and false aortic lumen fusion assembly, characterized in that: Including guidewire superselection device and aortic true and false lumen fusion device; The aortic true and false lumen fusion device includes a fusion catheter and a driving mechanism; a first lumen and a second lumen arranged side by side are provided in the fusion catheter, the proximal end of the first lumen is used for the tail end of the guide wire to pass through, and the distal end of the first lumen is used for the tail end of the guide wire to pass through; a knife outlet is provided on the proximal side wall of the second lumen, a cutting knife is hinged on the knife outlet, and the cutting knife can be rotated inwardly into the second lumen and outwardly out of the knife outlet, the driving mechanism is used to drive the cutting knife to rotate, and a guide hole is provided on the side wall of the second lumen between the distal end and the knife outlet, the guide hole is used for the tip end of the guide wire to pass through the second lumen, and the distal end of the second lumen is used for the tip end of the guide wire to pass through; The guidewire superselection device includes a magnetic head, a hose, a handle and a retractable drifting umbrella. The magnetic head is provided with a guidewire hole, which is connected to the proximal end of the lumen of the hose. A hollow interlayer is provided on the wall of the hose. A guidewire cavity and an injection cavity are provided in the handle. The guidewire cavity is connected to the distal end of the lumen of the hose, and the injection cavity is connected to the hollow interlayer. The drifting umbrella is sleeved and fixed on the proximal outer wall of the hose.

2. The aortic true and false lumen fusion assembly according to claim 1, characterized in that: The driving mechanism includes a slider, a push-pull rod and a transmission rod. The slider is slidably connected in the second cavity. The proximal end of the push-pull rod is connected to the distal end of the slider. The distal end of the push-pull rod extends out of the distal end of the second cavity. One end of the transmission rod is hinged to the proximal end of the slider, and the other end of the transmission rod is hinged to the proximal end of the cutting knife. The distal end of the cutting knife is hinged to the proximal end of the knife outlet.

3. The aortic true and false lumen fusion assembly according to claim 2, characterized in that: A hinge groove is provided on a side of the proximal end of the sliding block away from the knife outlet, and the distal end of the transmission rod is hinged in the hinge groove.

4. The aortic true and false lumen fusion assembly according to claim 2 or 3, characterized in that: The cutting knife is a quadrangular pyramid, the bottom surface of which is a rectangle with a longer side than a wider side, the two ends of the long side of the rectangle are the proximal end and the distal end of the cutting knife respectively, and the tip of the quadrangular pyramid is the cutting part of the cutting knife.

5. The aortic true and false lumen fusion assembly according to claim 1, characterized in that: A plurality of guide holes are provided on the side wall of the second cavity, and the plurality of guide holes are arranged at intervals along the axial direction of the second cavity.

6. The aortic true and false lumen fusion assembly according to claim 5, characterized in that: The guide hole is an inclined hole arranged obliquely toward the distal end of the second cavity.

7. The aortic true and false lumen fusion assembly according to claim 1, 5 or 6, characterized in that: A partition is provided in the fusion catheter, and the partition divides the second cavity into a first channel and a second channel. The knife exit is located on the first channel, and the guide hole is located on the second channel.

8. The aortic true and false lumen fusion assembly according to claim 1, characterized in that: The drifting umbrella comprises umbrella ribs made of elastic alloy and an umbrella surface made of soft film.

9. The aortic true and false lumen fusion assembly according to claim 1, characterized in that: The handle is provided with a liquid injection joint which is communicated with the liquid injection cavity.

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