Aortic membrane puncture system with angiography function

Abstract

The present invention discloses an aortic membrane puncture system with angiography function, comprising a catheter and an operating handle sleeved on the distal end of the catheter, the catheter is provided with a first cavity and a second cavity along its axial direction, a first guide wire capable of guiding the catheter into a branch blood vessel is passed through the first cavity, a puncture needle is provided in the second cavity, the puncture needle is provided with a guide cavity for the second guide wire to pass through along its axial direction, a side opening communicating with the second cavity is provided on the distal side wall of the catheter, a developing mark is provided at the side opening, the distal end of the puncture needle is a needle head with an arc-shaped curved structure, and the needle head can extend out of the side opening to perform stent membrane puncture. While achieving accurate membrane puncture, it can facilitate angiography.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to an aortic membrane puncture system with angiography function. Background Art

[0002] With the improvement of people's living standards, most people's diets are high in oil and salt, which leads to an increasing load on blood vessels, and in turn leads to an increasing incidence of vascular diseases. For this type of vascular disease, the existing treatment options are generally interventional surgical treatment using interventional medical devices. Interventional treatment has become an emerging treatment method alongside surgical treatment and internal medicine treatment. Compared with traditional surgical treatment, interventional treatment has the advantages of less trauma, simplicity, safety, effectiveness, fewer complications and significantly shortened hospital stay. Stent-based vascular repair has gradually been found to have some shortcomings, such as the easy occurrence of insufficient blood supply when the covered stent covers the branch blood vessels, affecting the treatment effect and the patient's life. When using interventional treatment methods, it is often necessary to open holes on both sides of the diaphragm, tissue or covered stent. When the covered stent is placed in the aorta, the branch blood vessels are often blocked. At this time, it is necessary to use in situ fenestration technology to accurately locate the fenestration on both sides of the covered membrane, and then reconstruct the branch blood vessels at the fenestration site.

[0003] In the existing technology, imaging equipment is generally used to image the window opening site. Under the guidance of the imaging equipment, medical staff use small-sized instruments based on their own experience to locate the window opening site, thereby completing the window opening operation. However, this method is not only difficult to locate and control the window opening direction, but also requires high experience of medical equipment and medical staff. How to achieve accurate positioning and window opening at the target location is a technical problem that needs to be solved urgently. Summary of the invention

[0004] In order to overcome the above-mentioned shortcomings, the purpose of the present invention is to provide an aortic membrane rupture puncture system with angiography function, which can achieve precise membrane rupture and facilitate angiography.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: an aortic membrane puncture system with angiography function, including a catheter and an operating handle sleeved on the distal end of the catheter, the catheter has a first cavity and a second cavity along its axial direction, the first cavity is penetrated by a first guide wire that can guide the catheter into a branch blood vessel, the second cavity is equipped with a puncture needle, the puncture needle has a guide cavity along its axial direction for the second guide wire to pass through, a side opening connected to the second cavity is opened on the distal side wall of the catheter, a development mark is set at the side opening, the distal end of the puncture needle is a needle head with an arc-shaped curved structure, and the needle head can extend out of the side opening to perform stent membrane rupture.

[0006] The beneficial effects of the present invention are as follows: the first guide wire guides the entire catheter into the branch blood vessel along the catheter, the catheter is guided into the side wall of the branch blood vessel, the catheter is rotated by holding the operating handle until the developing mark faces the stent, at this time, the second guide wire is pushed through the guide cavity through the side opening, and abuts against the stent, and the distance between the catheter and the stent is adjusted according to the position of the abutted stent, and after the catheter position is determined, the puncture needle is pushed to extend out of the side opening to rupture the stent membrane. The structure is simple, and the accuracy of membrane rupture is greatly improved.

[0007] Furthermore, the catheter is a braided tube, including a tube core, a braided layer and an outer layer arranged in sequence from the inside to the outside, the first cavity and the second cavity are opened on the tube core, the distal end of the first cavity extends beyond the distal end of the second cavity, the side opening is the distal outlet of the second cavity, and a straight hole is opened on the tube core, the straight hole is the distal outlet of the first cavity. The braided layer makes the catheter have better torsion resistance, ensuring that when the catheter is rotated by holding the operating handle, the entire catheter can rotate as a whole without twisting.

[0008] Furthermore, the catheter between the side opening and the straight hole is a pigtail-shaped contrast portion, and a plurality of contrast side holes communicating with the first cavity are provided on the side wall of the contrast portion. When the catheter is a straight tube, contrast solution cannot be injected, but when the catheter is a pigtail catheter with a contrast portion, after the first guide wire is withdrawn, the contrast portion recovers to a pigtail shape due to its own elasticity, and contrast solution can be injected into the first cavity. The contrast solution is discharged through the contrast side holes and is confined within the circle of the contrast portion, avoiding direct injection through the straight hole and causing damage to the blood vessel. The pigtail-shaped contrast portion realizes the contrast function.

[0009] Furthermore, a boss is extended outward from the side wall of the needle head, the boss is arranged around the outer wall of the needle head and the distance between the boss and the distal end of the needle head is 0.5-1 cm, and the boss can abut against the bracket. When the puncture needle is pushed, the action stops when the boss abuts against the bracket to avoid damaging the bracket.

[0010] Furthermore, the proximal end of the puncture needle passes through the operating handle and is fixed with a needle seat, one end of the needle seat is fixedly connected to the puncture needle, and the other end is connected to a locking piece that can fix the second guide wire, and the locking piece is a Luer connector.

[0011] Furthermore, a polygonal anti-rotation block is provided on the outer wall of the puncture needle near the needle seat, and the block can be a triangle, a quadrilateral, a pentagon, etc. A puncture needle channel connected to the second cavity and for the puncture needle to pass through is provided inside the operating handle, and the puncture needle channel is provided with an anti-rotation portion matching the shape of the anti-rotation block on the side near the needle seat. The anti-rotation block is inserted into the anti-rotation portion, so that the puncture needle will not rotate in the second cavity, ensuring that the needle head can always extend from the side opening. A guide wire channel connected to the first cavity and for the first guide wire to pass through is also provided inside the operating handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of the puncture needle in the state of being retracted into the catheter in Example 1 of the present invention;

[0013] Figure 2 It is a cross-sectional view of the state where the puncture needle is retracted into the catheter in Example 1 of the present invention;

[0014] Figure 3 for Figure 1 Sectional view along AA;

[0015] Figure 4 This is a schematic diagram of the structure of the puncture needle in Example 1 of the present invention;

[0016] Figure 5 This is a schematic structural diagram of the puncture needle in the puncture state in Embodiment 2 of the present invention;

[0017] Figure 6 It is a cross-sectional view of the puncture needle in the puncture state in embodiment 2 of the present invention.

[0018] In the figure:

[0019] 1. Catheter; 11. First cavity; 12. Second cavity; 13. Side opening; 14. Core tube; 15. Braided layer; 16. Outer layer; 17. Straight hole; 18. Angiography part; 181. Angiography side hole; 2. Operating handle; 3. Puncture needle; 31. Guide cavity; 32. Needle head; 33. Boss; 4. Second guide wire; 5. Needle seat; 6. Anti-rotation block. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] Example 1

[0022] See attached Figure 1-4 As shown, the aortic membrane puncture system with angiography function of the present invention comprises a catheter 1 and an operating handle 2 sleeved on the distal end of the catheter 1. The catheter 1 is a straight tube, and a first cavity 11 and a second cavity 12 are opened along its axial direction. A first guide wire that can guide the catheter 1 into the branch blood vessel is inserted into the first cavity 11, and the first guide wire withdraws from the first cavity 11 after the catheter 1 is introduced into the branch blood vessel. A puncture needle 3 is installed in the second cavity 12, and a guide cavity 31 for the second guide wire 4 to pass through is opened along its axial direction of the puncture needle 3. A side opening 13 that is connected to the second cavity 12 is opened on the distal side wall of the catheter 1, and a development mark is set at the side opening 13, and the development mark can be displayed under the device. The distal end of the puncture needle 3 is a needle head 32 with an arc-shaped curved structure, and the needle head 32 can extend out of the side opening 13 to perform stent membrane rupture.

[0023] After the stent is placed in the aorta, when the membrane needs to be ruptured, first, the entire catheter 1 is introduced into the branch vessel along the catheter 1 through the first guide wire. Due to the curvature of the branch vessel, the catheter 1 is introduced along the side wall of the branch vessel and the first guide wire is withdrawn. Then, the operating handle 2 is held and rotated until the imaging mark faces the stent. At this time, the second guide wire 4 is pushed through the guide cavity 31 through the side opening 13 and abuts against the stent. According to the position of the abutted stent, the distance between the catheter 1 and the stent is adjusted until the second guide wire 4 abuts against the position where the membrane needs to be ruptured. Finally, after the position of the catheter 1 is determined, the puncture needle 3 is pushed to extend out of the side opening 13 to rupture the membrane of the stent. After the membrane rupture is completed, the second guide wire 4 is introduced again to facilitate subsequent operations. The membrane rupture puncture system has a simple structure and greatly improves the accuracy of membrane rupture.

[0024] The catheter 1 is a braided tube, including a tube core 14, a braided layer 15 and an outer layer 16 arranged in sequence from the inside to the outside. The first cavity 11 and the second cavity 12 are opened on the tube core 14. The distal end of the first cavity 11 extends beyond the distal end of the second cavity 12, that is, the length of the first cavity 11 is greater than the length of the second cavity 12. The side opening 13 is the distal end outlet of the second cavity 12. The distal end of the second cavity 12 is a guide portion with the same curvature as the needle head 32, see the attached Figure 3 As shown, when the needle head 32 is retracted into the catheter 1, the needle head 32 is retracted into the second cavity 12, and is located in the guide portion of the second cavity 12, and the end is flush with the side opening 13. When the puncture needle 3 is pushed, the needle head 32 is pushed out of the side opening 13. A straight hole 17 is provided on the tube core 14, and the straight hole 17 is the distal outlet of the first cavity 11. The setting of the braided layer makes the catheter 1 have better torsion resistance, ensuring that when the catheter 1 is rotated by holding the operating handle 2, the entire catheter 1 can rotate as a whole without twisting.

[0025] The side wall of the needle head 32 extends outward with a boss 33, which is arranged around the outer wall of the needle head 32 and is 0.5-1 cm away from the distal end of the needle head 32. The boss 33 can abut against the bracket. When the puncture needle 3 is pushed, the action stops when the boss 33 abuts against the bracket to avoid damaging the bracket.

[0026] The proximal end of the puncture needle 3 penetrates the operating handle 2 and is fixed with a needle seat 5, one end of the needle seat 5 is fixedly connected to the puncture needle 3, and the other end is connected to a locking member that can fix the second guide wire 4, and the locking member is a Luer connector. The locking member can also be a buckle structure that can lock the second guide wire 4.

[0027] A polygonal anti-rotation block 6 is provided on the outer wall of the side of the puncture needle 3 close to the needle seat 5. The anti-rotation block 6 can be a triangle, a quadrilateral, a pentagon, etc. A puncture needle 3 channel is provided inside the operating handle 2, which is connected to the second cavity 12 and allows the puncture needle 3 to pass through. The side of the puncture needle 3 channel close to the needle seat 5 is an anti-rotation portion that matches the shape of the anti-rotation block 6. The anti-rotation block 6 is inserted into the anti-rotation portion so that the puncture needle 3 will not rotate in the second cavity 12, ensuring that the needle head 32 can always extend from the side opening 13. A guide wire channel is also provided inside the operating handle 2, which is connected to the first cavity 11 and allows the first guide wire to pass through.

[0028] Example 2

[0029] Only the catheter 1 in this embodiment is different from that in the embodiment, and the other structures are the same. The catheter 1 is a pigtail catheter 1, that is, the catheter 1 between the side opening 13 and the straight hole 17 is a pigtail-shaped contrast portion 18, and a plurality of contrast side holes 181 communicating with the first cavity 11 are provided on the side wall of the contrast portion 18. In the embodiment 1, when the catheter 1 is a straight tube, contrast solution cannot be injected. However, in this embodiment, when the catheter 1 is a pigtail catheter 1 with a contrast portion 18, after the first guide wire is withdrawn, the contrast portion 18 recovers to a pigtail shape due to its own elasticity, and contrast solution can be injected into the first cavity 11. The contrast solution is discharged through the contrast side holes 181 and is confined within the circle of the contrast portion 18, avoiding direct injection through the straight hole 17 to cause damage to the blood vessel. The pigtail-shaped contrast portion 18 realizes the contrast function.

[0030] The above implementation modes are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. Aortic membrane puncture system with angiography function, characterized by: The invention comprises a catheter and an operating handle sleeved on the distal end of the catheter, wherein the catheter is provided with a first cavity and a second cavity along its axial direction, a first guide wire capable of guiding the catheter into a branch blood vessel is passed through the first cavity, a puncture needle is provided in the second cavity, a guide cavity for the second guide wire to pass through is provided along the axial direction of the puncture needle, a side opening communicating with the second cavity is provided on the distal end side wall of the catheter, a developing mark is provided at the side opening, and the distal end of the puncture needle is a needle head with an arc-shaped curved structure, and the needle head can extend out of the side opening to rupture the stent membrane; The catheter is a braided tube, comprising a tube core, a braided layer and an outer layer arranged in sequence from the inside to the outside, the first cavity and the second cavity are opened on the tube core, the distal end of the first cavity extends beyond the distal end of the second cavity, the side opening is the distal outlet of the second cavity, and a straight hole is opened on the tube core, the straight hole is the distal outlet of the first cavity; A boss is extended outwardly from the side wall of the needle head, and the boss is arranged around the outer wall of the needle head and the distance between the boss and the distal end of the needle head is 0.5-1 cm, and the boss can abut against the bracket; a polygonal anti-rotation block is arranged on the outer wall of the puncture needle on the side close to the needle seat, and a puncture needle channel connected with the second cavity and for the puncture needle to pass through is arranged inside the operating handle, and the puncture needle channel is close to the needle seat. The side of the needle seat is an anti-rotation portion that matches the shape of the anti-rotation block.

2. The aortic membrane puncture system with angiography function according to claim 1, characterized in that: The conduit between the side opening and the straight hole is a pigtail-shaped imaging part, and a plurality of imaging side holes communicated with the first cavity are arranged on the side wall of the imaging part.

3. The aortic membrane puncture system with angiography function according to claim 1, characterized in that: The proximal end of the puncture needle passes through the operating handle and is fixed with a needle seat, one end of the needle seat is fixedly connected to the puncture needle, and the other end is connected to a locking piece that can fix the second guide wire.

Images