Repair system capable of accurately positioning

Abstract

The invention relates to the field of medical instruments, in particular to a repairing system capable of accurately positioning, which comprises a conveying catheter, a positioning support arranged in the conveying catheter, an anchoring mechanism, a flexible sleeve and a guiding mechanism, the positioning support is arranged at the far end of the conveying catheter, the far end part of the anchoring mechanism is arranged in the flexible sleeve, and the guiding mechanism is arranged in the flexible sleeve. The positioning support is provided with a plurality of positioning holes distributed in the circumferential direction and connecting rings connected with the positioning holes, the guiding mechanism comprises a single guiding wire and a single detaching wire, the guiding wire is provided with guiding holes, the detaching wire is provided with connecting rods, the far end of the anchoring mechanism is provided with connecting holes, the guiding wire firstly penetrates through the connecting holes, and the connecting rings penetrate through the corresponding guiding holes and then are connected with the connecting rods. The connecting rods penetrate through the corresponding connecting rings to form detachable connection; precise guiding and positioning of a plurality of anchoring positions can be completed only through the single guiding wire and the single detaching wire, the internal space of the sheathing canal is saved, and the problem that the guiding wires interfere with one another is solved.

Description

Technical Field

[0001] The present application belongs to the field of medical devices, and specifically relates to a repair system that can be precisely positioned. Background Art

[0002] Minimally invasive interventional medical technology is an efficient diagnosis and treatment method that has gradually emerged in recent years. It has outstanding advantages such as less trauma, simple operation, accurate intervention site, and fewer complications. It has now become one of the most important diagnosis and treatment methods for cardiovascular diseases and tumor diseases. In interventional medical surgery, professional doctors usually need to manually operate specific devices to enable one or more slender flexible catheters with different shapes or functions to pass through the patient's complex and changeable cardiovascular and other human body cavity environments, and send catheters, guide wires, stents and other instruments to the predetermined diagnosis and treatment lesion site for minimally invasive diagnosis and treatment of the lesion site. The incidence of mitral valve disease is high among adult heart valve diseases. Mitral regurgitation (MR) in mitral valve disease has a very serious impact on patients. Under normal circumstances, the mitral valve in the human heart acts as a hemostatic valve to prevent oxygen-rich blood from the lungs from flowing back into the left atrium. Once the mitral valve is improperly closed or misplaced, MR will occur, which will significantly reduce the heart's pumping efficiency and even cause heart failure. Mitral regurgitation is classified into two types: functional and degenerative. Functional mitral regurgitation (FMR) is characterized by mitral annular dilatation, inadequate leaflet coaptation, and tethered mitral valve leaflets, which are caused by left ventricular dysfunction and remodeling. Driven by the poor results and higher risks of surgical mitral valvuloplasty, people have begun to look for alternatives using catheters and minimally invasive methods, such as percutaneous edge-to-edge repair, indirect annuloplasty, and direct annuloplasty. Mitral annuloplasty is one of the most common surgical procedures for the treatment of FMR.

[0003] Patent CN 202310567779.4 discloses a guideable anchoring system, including a delivery catheter, a positioning stent arranged in the delivery catheter, an anchoring mechanism, a flexible sleeve and a guiding mechanism, wherein the positioning stent is arranged at the distal end of the delivery catheter, and the positioning stent is provided with a plurality of anchoring points distributed along the circumferential direction, the flexible sleeve is provided with a plurality of connection sites, and the guiding mechanism includes a plurality of guide wires, the guide wires respectively pass through the connection sites and are connected with the anchoring points, wherein the distal end of the anchoring mechanism is sleeved in the flexible sleeve, and the flexible sleeve cooperates with the guide wire so that the anchoring mechanism can be guided to each anchoring point according to a predetermined route and complete the anchoring. Although the multiple anchoring positions in this scheme can be accurately positioned by the positioning stent and its guiding mechanism, the multiple guide wires are easy to interfere with each other in a limited organ cavity, and when the multiple anchoring positions are disassembled in sequence, the resistance of the disassembly wire will be very large, which may cause problems such as deformation of the stent.

[0004] Therefore, technicians in this field are committed to developing a repair system that can be accurately positioned, mainly to solve the following problems: 1. Solve the problem of interference between multiple guide wires; 2. Solve the problem of excessive resistance during disassembly, which leads to deformation of the positioning bracket. Application Contents

[0005] The purpose of the present application is to provide a repair system that can be precisely positioned. The new anchoring mechanism has the following advantages: 1. The guidance and disassembly of multiple anchoring positions can be completed by only one guide wire and one disassembly wire, which effectively avoids the problem of multiple guide wires interfering with each other in the sheath and greatly reduces the required sheath space; 2. Each anchoring position is provided with its own connecting ring and connecting rod, and adopts a single anchoring and single disassembly method, which effectively avoids the influence of the positioning bracket and the other anchoring positions during the guidance and disassembly process.

[0006] In order to solve the above technical problems, the present application is solved through the following technical solutions: a repair system that can be precisely positioned, including a delivery catheter, a positioning bracket arranged in the delivery catheter, an anchoring mechanism, a flexible sleeve, and a guiding mechanism, wherein the positioning bracket is arranged at the distal end of the delivery catheter, and the distal end portion of the anchoring mechanism is arranged in the flexible sleeve, the positioning bracket is provided with a plurality of positioning holes distributed along the circumferential direction and a connecting ring connected to the positioning holes, the guiding mechanism includes a single guide wire and a single disassembly wire, the guide wire is provided with a guide hole, the disassembly wire is provided with a connecting rod, and the distal end of the anchoring mechanism is provided with a connecting hole. During pre-installation, the guide wire first passes through the connecting hole, and after the connecting ring passes through the corresponding guide hole, the connecting rod passes through the corresponding connecting ring to form a detachable connection.

[0007] As a further improvement of the present invention, the flexible sleeve is provided with a guide groove, and the connecting hole at the distal end of the anchoring mechanism is arranged at the guide groove; the guide groove enables the connecting hole at the distal end of the anchoring mechanism to cooperate with the guide wire to reach the positioning holes distributed circumferentially on the positioning bracket, that is, the expected anchoring position, so as to achieve precise guidance and positioning.

[0008] As a further improvement of the present invention, the positioning hole is an expected anchoring position. When the positioning bracket is released, the guide wire is tightened, and the anchoring mechanism reaches the expected anchoring position along the guide wire.

[0009] As a further improvement of the present invention, the guide wire is tightened, and after the anchoring mechanism completes the first anchoring, the disassembly wire is tightened to separate the connecting rod from the connecting ring, the anchoring mechanism is withdrawn, and the guide wire is tightened again, and the anchoring mechanism reaches the next anchoring position along the guide wire.

[0010] As a further improvement of the present invention, during pre-installation, the connection track direction of the guide wire is opposite to the connection track direction of the removal wire.

[0011] As a further improvement of the present invention, the anchoring mechanism includes an anchoring tube and an anchoring needle, the anchoring needle is pre-installed in the anchoring tube, and the distal end portion of the anchoring tube has a bending ability.

[0012] As a further improvement of the present invention, the connecting hole is arranged at the distal end of the anchoring tube, which makes it possible to avoid movement error during the guiding and positioning, that is, the guiding and positioning point is the expected anchoring point.

[0013] As a further improvement of the present invention, a push tube is provided in the delivery catheter, the distal end of the push tube is detachably connected to the proximal end of the flexible sleeve, and the anchoring tube is arranged in the push tube.

[0014] As a further improvement of the present invention, after the anchoring mechanism completes anchoring and withdraws, the pushing tube is pushed so that the flexible sleeve is pushed toward the distal end.

[0015] As a further improvement of the present invention, the flexible kit includes a fabric layer, a shrink ring frame and a control wire, the fabric layer wraps the shrink ring frame, and after the shrink ring frame is anchored to the autologous valve ring, the control wire is pulled, so that the shrink ring frame can drive the autologous valve ring to shrink.

[0016] As a further improvement of the present invention, during pre-installation, the flexible kit is loaded into the delivery catheter in a linear state or a vertical state; and during anchoring, the anchoring mechanism is pushed so that the flexible kit is anchored in sequence.

[0017] As a further improvement of the present invention, after all the anchoring positions are anchored, the flexible kit is anchored on the autologous valve ring, and the control wire is further operated so that the shrinking ring skeleton drives the autologous valve ring to shrink to treat valve ring dilatation.

[0018] Compared with the prior art, the advantages of this application are: 1. In the prior art, when the repair system is guiding and positioning, multiple guide wires will interfere with each other in the sheath, and excessive resistance during disassembly will cause deformation of the positioning bracket. In one embodiment of the present application, the guiding mechanism has only one guide wire and one disassembly wire, which can complete the precise guidance and positioning of multiple anchoring positions, effectively avoiding the problem of mutual interference between the guide wires, and greatly saving the space in the sheath. In addition, each anchoring position is provided with a corresponding connecting rod and connecting ring. After a certain anchoring position is completed, it is only necessary to tighten the disassembly wire to make the connecting rod disengage from the connecting ring. During separation, there is only friction between the connecting rod and the corresponding connecting ring, and the disassembly resistance is small. Moreover, it will not affect the remaining anchoring positions of the positioning bracket. The structural design is simple and easy to operate, and the operator's operation requirements are not high, which has good clinical significance.

[0019] 2. Different from the prior art, in one embodiment of the present application, the flexible kit is provided with a guide groove, and the connecting hole at the distal end of the anchoring mechanism is arranged at the guide groove, so that there will be no movement error when the distal end of the anchoring mechanism reaches the positioning hole along the guide wire, that is, the positioning hole is the expected anchoring position, thereby achieving precise guided positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the repair system of the present invention.

[0021] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0022] Figure 3 for Figure 1 Enlarged view of part B in the middle.

[0023] Figure 4 It is a schematic structural diagram of the guide wire of the present invention.

[0024] Figure 5 It is a schematic structural diagram of the disassembly wire of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the anchoring mechanism of the present invention.

[0026] Figure 7 This is a pre-installed diagram of the flexible kit of the present invention.

[0027] Figure 8 It is a schematic structural diagram of the flexible kit of the present invention.

[0028] Figures 9 to 16 It is a schematic diagram of the working process of the repair system of the present invention.

[0029] The names of the parts indicated by the numbers in the accompanying drawings are as follows: 1-delivery catheter, 2-positioning bracket, 21-positioning hole, 22-connecting ring, 3-anchoring mechanism, 31-anchoring tube, 32-anchoring needle, 33-connecting hole, 4-flexible kit, 41-guide groove, 42-fabric layer, 43-shrinking ring skeleton, 44-control wire, 5-guiding mechanism, 51-guide wire, 511-guide hole, 52-disassembly wire, 521-connecting rod, 6-push tube. Implementation

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] The proximal end mentioned in the present application refers to the end close to the surgical operator, and the distal end refers to the end far away from the surgical operator. Specific embodiments

[0032] like Figures 1 to 3 As shown, when the anchoring system is used for mitral valve contraction ring plasty treatment, a repair system that can be accurately positioned includes a delivery catheter 1, a positioning stent 2 arranged in the delivery catheter 1, an anchoring mechanism 3, a flexible sleeve 4, and a guiding mechanism 5. The positioning stent 2 is arranged at the distal end of the delivery catheter 1, and the distal end portion of the anchoring mechanism 3 is arranged in the flexible sleeve 4. The positioning stent 2 is provided with a plurality of positioning holes 21 distributed along the circumferential direction and a plurality of connecting rings 22 connected to the plurality of positioning holes 21. The guiding mechanism 5 includes a single guide wire 51 and a single disassembly wire 52. The guide wire 51 is provided with a plurality of guide holes 511 arranged corresponding to the positioning holes 21, as shown in FIG. Figure 4 As shown, the disassembly wire 52 is provided with a plurality of connecting rods 521 corresponding to the connecting ring 22. Figure 5 As shown, the distal end of the anchoring mechanism 3 is provided with a connection hole 33. When pre-installed, the guide wire 51 first passes through the connection hole 33, and after the connecting ring 22 passes through the corresponding guide hole 511, the connecting rod 521 passes through the corresponding connecting ring 22 to form a detachable connection. When the delivery catheter 1 enters the heart, the positioning bracket 2 is released, so that the positioning hole 21 on the positioning bracket 2 is abutted against the expected anchoring position, as shown in FIG. Fig. 9 As shown, the guide wire 51 is tightened and the anchoring mechanism 3 is pushed. The anchoring mechanism 3 arrives at the positioning hole 21 along the path of the guide wire 51. The anchoring mechanism 3 is operated to complete the anchoring of the first anchoring position. Then, the disassembly wire 52 is tightened so that the connecting rod 521 at this position is disengaged from the connecting ring 22, and the disassembly is completed. Figures 10 to 12 As shown, the anchoring mechanism 3 is then withdrawn, and the guide wire 51 is tightened again to push the anchoring mechanism 3 to the second anchoring position, as shown in FIG. Fig.13 and Fig.14As shown, and so on, complete the anchoring at all anchoring positions, such as Fig.15 and Fig.16 shown.

[0033] In this embodiment, the flexible sleeve 4 is provided with a guide groove 41, and the connecting hole 33 at the distal end of the anchoring mechanism 3 is arranged at the guide groove 41. Figure 3 As shown; the guide groove 41 enables the connecting hole 33 at the distal end of the anchoring mechanism 3 to cooperate with the guide wire 51 to reach the positioning holes 21 distributed circumferentially of the positioning bracket 2, that is, the expected anchoring position, to achieve precise guidance and positioning.

[0034] In this embodiment, the positioning hole 21 is the expected anchoring position. When the positioning bracket 2 is released, the guide wire 51 is tightened, and the anchoring mechanism 3 reaches the expected anchoring position along the guide wire 51 .

[0035] In this embodiment, the guide wire 51 is tightened, and after the anchoring mechanism 3 completes the first anchoring, the removal wire 52 is tightened, so that the connecting rod 521 is separated from the connecting ring 22. Figures 10 to 12 As shown, the anchoring mechanism 3 is withdrawn, the guide wire 51 is tightened again, and the anchoring mechanism 3 arrives at the next anchoring position along the guide wire 51. Fig.13 and Fig.14 shown.

[0036] In this embodiment, during pre-installation, the connection trajectory direction of the guide wire 51 is opposite to the connection trajectory direction of the removal wire 52 .

[0037] In this embodiment, the anchoring mechanism 3 includes an anchoring tube 31 and an anchoring needle 32. The anchoring needle 32 is pre-installed in the anchoring tube 31, and the distal end of the anchoring tube 31 has a bending ability. Figure 6 shown.

[0038] In this embodiment, the connecting hole 33 is arranged at the distal end of the anchoring tube 31, so that there is no movement error during the guiding positioning, that is, the guiding positioning point is the expected anchoring point.

[0039] In this embodiment, a push tube 6 is provided in the delivery catheter 1, the distal end of the push tube 6 is detachably connected to the proximal end of the flexible sleeve 4, and the anchor tube 31 is provided in the push tube 6. Figure 7 shown.

[0040] In this embodiment, after the anchoring mechanism 3 completes anchoring and withdraws, it pushes the pushing tube 6 to push the flexible sleeve 4 toward the distal end.

[0041] In this embodiment, the flexible kit 4 includes a fabric layer 42, a shrink ring frame 43 and a control wire 44, and the fabric layer 42 wraps the shrink ring frame 43. Figure 8 As shown, after the shrink ring skeleton 43 is anchored to the autologous valve ring, pulling the control wire 44 can make the shrink ring skeleton 43 drive the autologous valve ring to shrink.

[0042] In this embodiment, during pre-installation, the flexible sleeve 4 is loaded into the delivery catheter 1 in a linear state or a vertical state; and during anchoring, the anchoring mechanism 3 is pushed so that the flexible sleeve 4 is anchored in sequence.

[0043] In this embodiment, after all the anchoring positions are anchored, the flexible kit 4 is anchored on the native valve ring, and the control wire 44 is further operated to make the shrinking ring frame 43 drive the native valve ring to shrink to treat valve ring dilatation.

[0044] The foregoing description of several embodiments of the present application is presented for illustrative purposes. The foregoing description is not intended to be exhaustive, nor is it intended to limit the present application to the precise configurations, constructions and / or steps disclosed, and it is apparent that many modifications and variations may be made in light of the teachings above. The scope of the present invention and all equivalents are intended to be defined by the appended claims.

Claims

1. A repair system capable of accurate positioning, comprising a delivery catheter, a positioning bracket arranged in the delivery catheter, an anchoring mechanism, a flexible sleeve, and a guiding mechanism, wherein the positioning bracket is arranged at the distal end of the delivery catheter, the distal end portion of the anchoring mechanism is arranged in the flexible sleeve, the positioning bracket is provided with a plurality of positioning holes distributed along the circumferential direction and a connecting ring connected to the positioning holes, characterized in that: The guiding mechanism includes a single guiding wire and a single disassembly wire, the guiding wire is provided with a guiding hole, the disassembly wire is provided with a connecting rod, and the distal end of the anchoring mechanism is provided with a connecting hole. During pre-installation, the guiding wire first passes through the connecting hole, and after the connecting ring passes through the corresponding guiding hole, the connecting rod passes through the corresponding connecting ring to form a detachable connection.

2. A repair system capable of accurate positioning according to claim 1, characterized in that: The flexible sleeve is provided with a guide groove, and the engaging hole at the distal end of the anchoring mechanism is arranged at the guide groove.

3. The repair system capable of accurate positioning according to claim 1, characterized in that: The positioning hole is the expected anchoring position. When the positioning bracket is released, the guide wire is tightened, and the anchoring mechanism reaches the expected anchoring position along the guide wire.

4. The repair system capable of accurate positioning according to claim 1, characterized in that: After the guide wire is tightened and the anchoring mechanism completes the first anchoring, the disassembly wire is tightened to separate the connecting rod from the connecting ring, the anchoring mechanism is withdrawn, and the guide wire is tightened again, and the anchoring mechanism reaches the next anchoring position along the guide wire.

5. The repair system capable of accurate positioning according to claim 1, characterized in that: During pre-installation, the connection track direction of the guide wire is opposite to the connection track direction of the removal wire.

6. The repair system capable of accurate positioning according to claim 1, characterized in that: The anchoring mechanism comprises an anchoring tube and an anchoring needle. The anchoring needle is pre-installed in the anchoring tube, and the distal end portion of the anchoring tube has a bending ability.

7. The repair system capable of accurate positioning according to claim 6, characterized in that: A push tube is arranged in the delivery catheter, the distal end of the push tube is detachably connected to the proximal end of the flexible sleeve, and the anchoring tube is arranged in the push tube.

8. The repair system capable of accurate positioning according to claim 7, characterized in that: When the anchoring mechanism completes anchoring and withdraws, the pushing tube is pushed to push the flexible sleeve toward the distal end.

9. The repair system capable of accurate positioning according to claim 1, characterized in that: The flexible kit includes a fabric layer, a shrink ring frame and a control wire. The fabric layer wraps the shrink ring frame. After the shrink ring frame is anchored to the autologous valve ring, the control wire is pulled so that the shrink ring frame drives the autologous valve ring to shrink.

10. The repair system capable of accurate positioning according to claim 1, characterized in that: During pre-installation, the flexible kit is loaded into the delivery catheter in a linear state or a vertical state; and during anchoring, the anchoring mechanism is pushed so that the flexible kit is anchored in sequence.

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