Cardiac tissue stoma device

Abstract

The present invention discloses a cardiac tissue ostomy device, which relates to the technical field of medical devices. The cardiac tissue ostomy device comprises a catheter kit, a drive assembly, a cutter and a clamping structure. The cutter is arranged at the end of the catheter kit. The drive assembly is arranged in the catheter kit, and the drive assembly has a puncture end, and the drive assembly can drive the cutter to move relative to the tissue so that the cutter cuts the tissue. The clamping structure is arranged on the puncture end, and the clamping structure is used to clamp the tissue. After the puncture end passes through the tissue, it has a limiting effect on the falling of the tissue, and a part of the clamping structure can prevent the tissue from falling off, so that the integrity of the tissue cut by the cutter can be ensured when the cutter cuts the tissue, which not only enables the cutter to cut the tissue smoothly, but also improves the cutting effect of the tissue; after the cutting is completed, the tissue can also be stably maintained on the clamping structure during the process of the catheter kit transporting the puncture end and the cutter to the outside of the human body, thereby preventing the tissue from falling and forming embolism, and improving the reliability of tissue cutting.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a cardiac tissue stoma device. Background Art

[0002] Atrial shunt device is an emerging technology in the field of heart failure device treatment in the world this year. It creates a stoma in the heart tissue to achieve left atrial blood shunt, effectively reducing the patient's left atrial pressure, relieving pulmonary congestion and pulmonary hypertension, improving the patient's symptoms and improving their living standards. It is often required to complete the stoma in the heart tissue and try to avoid the problem of early occlusion caused by balloon dilatation stoma and other complications caused by implantable stoma devices.

[0003] Therefore, there is an urgent need for a cardiac tissue stoma device that can achieve defective cardiac tissue stoma through effective tissue cutting and ensure that the cut tissue is completely returned to the catheter and removed from the body to avoid stoma occlusion and embolism, truly achieving "intervention without implantation" and allowing for a secondary operation. Summary of the invention

[0004] The purpose of the present invention is to provide a cardiac tissue stoma device, which can improve the tissue cutting effect and ensure that the tissue is returned and taken out of the body.

[0005] In order to achieve the above technical effects, the technical solution of the cardiac tissue stoma device of the present invention is as follows:

[0006] A cardiac tissue ostomy device comprises: a catheter kit; a cutter, the cutter being arranged at the end of the catheter kit; a drive assembly, the drive assembly being arranged in the catheter kit, the drive assembly having a puncture end, the drive assembly being capable of driving the cutter to move relative to tissue so that the cutter cuts the tissue; and a clamping structure, the clamping structure being arranged on the puncture end and being used to clamp the tissue.

[0007] Furthermore, the clamping structure includes a barb, and the barb is resettably arranged on the outer peripheral wall of the puncture end, and the barb extends from a direction away from the catheter set and is bent in a direction close to the catheter set.

[0008] Furthermore, there are multiple barbs, and the multiple barbs are evenly distributed along the circumferential direction of the puncture end.

[0009] Furthermore, the clamping structure further comprises a limiting member, wherein the limiting member is sleeved on the plurality of barbs, and the limiting member is used for limiting the barbs from springing outwards along the radial direction of the puncture end.

[0010] Furthermore, the drive assembly includes: a drive member connected to the catheter kit; a push-pull rod, which is arranged at the end of the catheter kit and connected to the output end of the drive member, the puncture end is arranged on the push-pull rod, and the cutter is connected to the push-pull rod.

[0011] Furthermore, the cutter includes: a knife body, which defines a matching hole; a transmission part, which is inserted into the matching hole and connected to the knife body, and the transmission part is connected to the push-pull rod, and when the push-pull rod moves along the axial direction of the matching hole, it can drive the transmission part to rotate around the axis of the matching hole.

[0012] Furthermore, the transmission part cooperates with the push-pull rod via a non-self-locking spiral transmission pair.

[0013] Furthermore, the driving assembly also includes an elastic member, one end of which is connected to the driving member, and the other end of which is connected to the push-pull rod.

[0014] Furthermore, the clamping structure includes a cutting portion, which is arranged at one end of the puncture end facing the cutter, the cutter is an annular knife, the cutting portion can be fitted in the annular knife, and the cutting portion is provided with a cutting surface at one end facing the cutter.

[0015] Furthermore, the cross-sectional area of ​​the connection between the puncture end and the cutting portion is the same as the cross-sectional area of ​​the cutting portion, and the cross-sectional area of ​​the puncture end gradually decreases in the direction away from the cutting portion.

[0016] The beneficial effects of the present invention are as follows: the catheter kit can facilitate the reliable delivery of the cutter and the clamping structure to the ventricle along the blood vessels during cardiac surgery, so as to facilitate the cutter to cut tissues in the heart, and can also be used for cutting other tissues in the human body, greatly improving the scope of application of tissue cutting. When the cutter and the clamping structure smoothly enter one side of the tissue to be cut, the drive assembly can drive the cutter to move. When the drive assembly is working, the puncture end will first puncture the tissue and drive a part of the clamping structure to move to the other side of the tissue. Driven by the puncture end, a part of the clamping structure can have a better gripping effect on the tissue during the process of passing through the tissue or after moving to the other side of the tissue; thereafter, the drive assembly can drive the cutter to move toward the tissue and cut off the tissue of a preset size. Since the puncture end has a limiting effect on the falling of the tissue after passing through the tissue, a part of the clamping structure can prevent the tissue from falling off, so that when the cutter cuts the tissue, the relatively soft tissue is difficult to be relatively displaced with the cutter, thereby ensuring the integrity of the tissue cut by the cutter, which not only allows the cutter to cut the tissue smoothly, but also improves the cutting effect of the tissue; at the same time, after the cutting is completed, the tissue can be stably maintained on the clamping structure during the process of the catheter kit transporting the puncture end and the cutter outside the human body, thereby preventing the tissue from falling and forming embolism, thereby improving the reliability of tissue cutting.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a cardiac tissue stoma device provided in Example 1 of the present invention;

[0019] Figure 2 is a schematic cross-sectional structural diagram of the cardiac tissue stoma device provided in Example 1 of the present invention when cutting tissue;

[0020] Figure 3 is a schematic structural diagram of a cardiac tissue stoma device provided in Example 2 of the present invention;

[0021] Figure 4 This is one of the cross-sectional structural schematic diagrams of the cardiac tissue stoma device provided in Example 2 of the present invention when cutting tissue;

[0022] Figure 5 This is the second schematic cross-sectional structure diagram of the cardiac tissue stoma device provided in Example 2 of the present invention when cutting tissue;

[0023] Figure 6 is a schematic structural diagram of a cardiac tissue stoma device provided in Example 3 of the present invention;

[0024] Figure 7is a schematic cross-sectional structural diagram of the cardiac tissue stoma device provided in Example 3 of the present invention when cutting tissue;

[0025] Figure 8 It is a structural schematic diagram of the driving assembly and the clamping structure provided in Example 3 of the present invention.

[0026] Reference numerals

[0027] 1. catheter kit; 11. catheter assembly; 111. working catheter; 112. fixed outer sleeve; 12. rigid part; 121. mounting hole;

[0028] 2. Cutter; 21. Cutter body; 211. Matching hole; 22. Transmission part;

[0029] 31. puncture end; 311. guide groove; 32. feeding member; 33. push-pull rod; 331. non-self-locking spiral transmission pair; 34. handle;

[0030] 4. Clamping structure; 41. Barb; 42. Stopper; 43. Cutting part; 431. Cutting surface;

[0031] 5. Organization. DETAILED DESCRIPTION

[0032] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] Reference below Figure 1-Figure 8 The specific structure of the cardiac tissue ostomy device according to the embodiment of the present invention is described.

[0037] like Figure 1-Figure 8 As shown, Figure 1 A cardiac tissue ostomy device is disclosed, which comprises a catheter kit 1, a drive assembly, a cutter 2 and a clamping structure 4. The cutter 2 is arranged at the end of the catheter kit 1. The drive assembly is arranged in the catheter kit 1, and the drive assembly has a puncture end 31, and the drive assembly can drive the cutter 2 to move relative to the tissue 5 so that the cutter 2 cuts the tissue 5. The clamping structure 4 is arranged on the puncture end 31, and the clamping structure 4 is used to clamp the tissue 5.

[0038] It is understandable that the catheter kit 1 can facilitate the reliable delivery of the cutter 2 and the clamping structure 4 to the ventricle along the blood vessels during cardiac surgery, so that the cutter 2 can cut the tissue 5 in the heart. It can also be used to cut tissue 5 in other human bodies, greatly improving the scope of application of cutting tissue 5. When the cutter 2 and the clamping structure 4 successfully enter one side of the tissue 5 to be cut, the drive assembly can drive the cutter 2 to move. When the drive assembly is working, the puncture end 31 will first puncture the tissue 5 and drive a part of the clamping structure 4 to move to the other side of the tissue 5. Driven by the puncture end 31, a part of the clamping structure 4 can play a good anti-falling effect on the tissue 5 during the process of passing through the tissue 5 or after moving to the other side of the tissue 5; thereafter, the drive assembly can drive the cutter 2 to move toward the tissue 5 and cut off the tissue 5 of a preset size. Since the puncture end 31 has a limiting effect on the falling of the tissue 5 after passing through the tissue 5, a part of the clamping structure 4 can prevent the tissue 5 from falling off, so that when the cutter 2 cuts the tissue 5, the relatively soft tissue 5 is difficult to be relatively displaced with the cutter 2, thereby ensuring the integrity of the tissue 5 cut by the cutter 2, so that the cutter 2 can smoothly cut the tissue 5 and improve the cutting effect of the tissue 5; at the same time, after the cutting is completed, the tissue 5 can also be stably maintained on the clamping structure 4 during the process of the catheter kit 1 transporting the puncture end 31 and the cutter 2 to the outside of the human body, thereby preventing the tissue 5 from falling and forming embolism, thereby improving the reliability of the cutting of the tissue 5.

[0039] When the cardiac tissue stoma device of the present embodiment is used for stoma of cardiac tissue such as the atrial septum in the heart, compared with the prior art that completes stoma by balloon dilation, since the cutter 2 of the present embodiment can cut a defective opening on the tissue 5, it is difficult for the opening to be blocked. At the same time, the entire cardiac tissue stoma device can be completely removed from the body after the cutting is completed, realizing a non-implanted stoma, which can prevent the implant from causing long-term thrombosis in the body and complications that make it impossible to perform surgery again, thereby ensuring multiple reliable operations and improving the success rate of the operation. At the same time, the cutting of the tissue 5 by the cutter 2 is a physical cutting, which is less likely to cause complications to the tissue 5 than other cutting methods, and can ensure the safety of the operation. Of course, the cardiac tissue stoma device of the present embodiment is not limited to atrial septal stoma, and it can also be applied to openings of other human tissues.

[0040] In some embodiments, Figure 1-Figure 5 As shown, the clamping structure 4 includes a barb 41 , which is resettably disposed on the outer peripheral wall of the puncture end 31 , and the barb 41 extends from a direction away from the catheter set 1 and is bent in a direction approaching the catheter set 1 .

[0041] It is understandable that when the drive assembly drives the puncture end 31 to move in the tissue 5, the barbs 41 will not have a negative impact on the movement of the tissue 5, and will approach the puncture end 31 under the pressure of the tissue 5; after the drive assembly drives the puncture end 31 to move to the other side of the tissue 5, the barbs 41 are no longer pressed by the tissue 5, and thus bounce in a direction away from the puncture end 31. When the cutter 2 has cut the tissue 5, the drive assembly, the catheter kit 1, the cutter 2 and the cut tissue 5 move out of the body, and the popped-out barbs 41 can ensure that the tissue 5 cannot slip off.

[0042] Of course, in other embodiments of the present invention, the clamping structure 4 may also be configured as a spiral puncture structure that can cooperate with the tissue 5, and the specific structure of the clamping structure 4 may be determined according to actual needs.

[0043] Specifically, in this embodiment, the barbs 41 are made of thin steel wires, which are stable and easy to clean, and have good rigidity and elasticity, and can ensure that they bounce back after passing through the tissue 5, thereby ensuring the gripping effect on the tissue 5. Of course, in other embodiments of the present invention, the material of the barbs 41 can be determined according to actual surgical requirements, and no specific limitation is required here.

[0044] In some embodiments, Figure 3-Figure 5 As shown, there are multiple barbs 41 , and the multiple barbs 41 are evenly distributed along the circumferential direction of the puncture end 31 .

[0045] It is understandable that after the barbs 41 pass through the tissue 5, the multiple barbs 41 can improve the gripping effect of the entire clamping structure 4 on the tissue 5, so as to further improve the gripping effect of the barbs 41 on the tissue 5, thereby further improving the cutting effect of the tissue 5 and reducing the possibility of the tissue 5 falling off.

[0046] In some embodiments, Figure 3-Figure 5 As shown, the clamping structure 4 further includes a limiting member 42 , which is sleeved on the plurality of barbs 41 , and is used to limit the barbs 41 from springing outward along the radial direction of the puncture end 31 .

[0047] It is understandable that if the barbs 41 have greater elasticity, the puncture end 31 will not easily drive the multiple barbs 41 to move in the tissue 5, and the limiter 42 can limit the rebound of the barbs 41 to ensure that the puncture end 31 can reliably drive the multiple barbs 41 to puncture the other side of the tissue 5. Figure 4 and Figure 5As shown, when the puncture end 31 moves in the tissue 5, since the limiting member 42 has no connection with the puncture end 31, the limiting member 42 will remain on one side of the tissue 5 under the limitation of the tissue 5, and the puncture end 31 can only drive the multiple barbs 41 to move to the other side of the tissue 5. Since the barbs 41 have great elasticity, the force applied by the barbs 41 to the tissue 5 after passing through the tissue 5 is greatly increased, and can overcome the force applied by the cutter 2 to the tissue 5 when the tissue 5 is cut directly along the extension direction of the puncture end 31, so that the cutter 2 can complete the cutting of the tissue 5 by moving in a straight line direction, thereby improving not only the cutting effect of the tissue 5, but also the cutting efficiency of the tissue 5. In addition, since the cutter 2 in this embodiment can move in a straight line direction to complete the cutting of the tissue 5, the drive assembly does not need to provide a large power to the cutter 2, that is, if Figure 3-Figure 5 As shown, the driving assembly in this embodiment can be directly formed as a manually operated handle 34, and the operator can directly push the surgical handle to move in a straight line to drive the cutter 2 to move in a straight line. In order to ensure that the cutter 2 can reliably cut the tissue 5, after the straight-line cutting is completed, the operator can rotate the surgical handle and drive the cut tissue 5 to rotate and cut the remaining fibers to complete the entire cutting work, so as to ensure that the cutter 2 cuts the tissue 5.

[0048] Specifically, in this embodiment, the number of the barbs 41 can be 8-12, and the specific number of the barbs 41 can be determined according to the actual tissue 5 to be cut.

[0049] Specifically, in this embodiment, after the multiple barbs 41 move to the other side of the tissue 5, the distance between the tip of the barb 41 and the central axis of the puncture end 31 is smaller than the distance between the outer wall of the tissue 5 cut by the cutter 2 and the central axis of the puncture end 31, thereby ensuring smooth cutting of the tissue 5.

[0050] In some embodiments, the driving assembly includes a driving member (not shown) and a push-pull rod 33. The driving member is connected to the catheter set 1. The push-pull rod 33 is arranged at the end of the catheter set 1 and connected to the output end of the driving member, the puncture end 31 is arranged on the push-pull rod 33, and the cutter 2 is connected to the push-pull rod 33.

[0051] In some specific embodiments, the driving member and the push-pull rod 33 are respectively arranged at both ends of the catheter kit 1, which can facilitate the operator to control the movement of the cutter 2 and the puncture end 31 located at the other end of the catheter kit 1 at one end of the catheter kit 1.

[0052] In some specific embodiments, the driving member is disposed in the catheter kit 1, and the driving member and the push-pull rod 33 are disposed at the same end of the catheter kit 1. It is understandable that, through the above-mentioned structural arrangement, it is convenient for the driving member to directly drive the push-pull rod 33 to move, and then the push-pull rod 33 can directly drive the cutter 2 to move to complete the cutting of the tissue 5, thereby improving the accuracy and precision of the driving member driving the push-pull rod 33 to move, and improving the actuation response speed of the push-pull rod 33, thereby improving the accuracy and sensitivity of the cutter 2 movement, and improving the cutting effect of the tissue 5. Of course, in the embodiment of the present invention, the specific installation position of the driving member and the push-pull rod 33 in the catheter kit 1 can be determined according to actual operation requirements, and no specific limitation is required.

[0053] In some embodiments, Figure 2 As shown, the cutter 2 includes a cutter body 21 and a transmission part 22. The cutter body 21 defines a matching hole 211. The transmission part 22 is inserted into the matching hole 211 and connected to the cutter body 21. The transmission part 22 is connected to a push-pull rod 33. When the push-pull rod 33 moves along the axial direction of the matching hole 211, it can drive the transmission part 22 to rotate around the axis of the matching hole 211.

[0054] It is understandable that, because the transmission part 22 can drive the blade body 21 to rotate around the axis of the matching hole 211 under the drive of the driving member, the blade body 21 can rotate relative to the tissue 5. At the same time, the operator can also drive the cutter 2 to move in the axial direction by driving the catheter kit 1 in its axial direction, so that the blade body 21 can simultaneously rotate and linearly move relative to the tissue 5. Compared with ordinary cutting tools that can only linearly cut or rotationally cut relative to the tissue 5, the cutting effect of the blade body 21 on the tissue 5 is greatly improved. At the same time, the blade body 21 defines the matching hole 211, so that the cutting end of the blade body 21 can be formed into a circular ring, which is convenient for cutting the circular tissue 5, which is beneficial to improve the cutting effect of the tissue 5. In some specific embodiments, such as Figure 1 As shown, the catheter kit 1 includes a catheter assembly 11 and a rigid part 12. The rigid part 12 is connected to one end of the catheter assembly 11, and the rigid part 12 is provided with a mounting hole 121, in which the drive assembly and the cutter 2 are both fitted.

[0055] It can be understood that the catheter assembly 11 can be easily operated in the human body, and the mounting hole 121 opened on the rigid part 12 can play a good protective role for the drive assembly and the cutter 2, and can prevent the cutter 2 and the drive assembly from interfering with the human body during transportation, thereby avoiding damage to the human body and preventing the drive assembly and the cutter 2 from having difficulty in completing the cutting work after being transported to the tissue 5, thereby ensuring reliable cutting of the tissue 5.

[0056] In some specific embodiments, the rigid portion 12 and the catheter assembly 11 are connected by compression or adhesive bonding.

[0057] In some specific embodiments, Figure 1 As shown, the catheter assembly 11 includes a working catheter 111 and a fixed outer sleeve 112 , and the fixed outer sleeve 112 is sleeved on the working catheter 111 .

[0058] It can be understood that the fixed outer sleeve 112 can support the working catheter 111, which not only facilitates the connection between the working catheter 111 and the external device, but also avoids the problem of movement of the working catheter 111 when it is running in the human body, thereby facilitating the rapid transportation of the cutter 2 and the clamping structure 4 to the tissue 5 and improving the cutting efficiency of the tissue 5.

[0059] In some specific embodiments, Figure 1 As shown, the driving assembly further includes a feeding member 32, which is connected to the fixed outer sleeve 112 and the working catheter 111. The feeding member 32 is used to drive the working catheter 111 to move relative to the fixed sleeve, thereby driving the cutter 2 to move along its axial direction, so that the operator can drive the cutter 2 to linearly cut the tissue 5 outside the human body. The structure of the feeding member 32 can adopt the driving structure in the prior art, and no further description is needed here.

[0060] In some embodiments, Figure 2 As shown, the push-pull rod 33 cooperates with the transmission part 22 through a non-self-locking spiral transmission pair 331.

[0061] It is understandable that, since the push-pull rod 33 cooperates with the transmission part 22 through the non-self-locking spiral transmission pair 331, the push-pull rod 33 can drive the transmission part 22 to rotate and drive the blade body 21 to rotate when it moves in a straight line. When the cutter 2 moves under the drive of the catheter kit 1 and abuts against the tissue 5, the cutter 2 can perform a rotational movement relative to the tissue 5, thereby achieving a better cutting effect of the tissue 5 through a simple linear drive. In addition, the non-self-locking spiral transmission pair 331 has a high lead angle, which can prevent the push-pull rod 33 from locking during the movement of the transmission part 22, so as to ensure that the push-pull rod 33 can drive the transmission part 22 to reciprocate and rotate relative to the tissue 5, thereby improving the cutting effect of the blade body 21 on the tissue 5. Of course, in other embodiments of the present invention, the push-pull rod 33 and the transmission part 22 can also achieve the conversion between linear motion and rotational motion through other structures, which does not need to be specifically limited here.

[0062] In addition, in this embodiment, since the caliber of the cardiac tissue stoma is usually small, the cutting range of the cutter 2 is also small. Considering the material of the knife body 21, if the knife body 21 is directly matched with the push-pull rod 33, the production cost of the knife body 21 will be greatly increased. In this embodiment, the cutter 2 includes a knife body 21 and a transmission part 22. Since the transmission part 22 does not need to consider the material and processing technology of the knife body 21, it is possible to maintain a low production cost of the cutter 2 while achieving the effect of rotating cutting of the cutter 2.

[0063] Furthermore, if Figure 2 As shown, since the cutter 2 includes a transmission part 22 and a blade body 21, it is convenient to form a limiting opening at the connection between the transmission part 22 and the blade body 21, and a limiting protrusion that cooperates with the limiting opening is provided on the inner peripheral wall of the rigid part 12. The limiting opening and the limiting protrusion cooperate to achieve a limiting effect on the relative displacement of the cutter 2 in the axial direction of the rigid part 12. Therefore, the structure of the transmission part 22 and the blade body 21 can also facilitate the limiting effect between the cutter 2 and the rigid part 12, thereby reducing the processing cost of the cutter. Of course, in other embodiments of the present invention, the limiting structure between the cutter 2 and the rigid part 12 can adopt other limiting structures in the mechanical field without specific limitation.

[0064] In some embodiments, the driving assembly further includes an elastic member (not shown), one end of the elastic member is connected to the driving member, and the other end of the elastic member is connected to the push-pull rod 33 .

[0065] It can be understood that when the driving member drives the push-pull rod 33 to move toward the tissue 5, the elastic member is compressed under the action of the driving member; when the driving member stops the push-pull rod 33 from moving toward the tissue 5, the elastic member rebounds and drives the push-pull rod 33 to move away from the tissue 5. Therefore, by cutting off and starting the driving member, the push-pull rod 33 can be reciprocated relative to the tissue 5, and then the cutter 2 can be reciprocated and rotated, thereby achieving a reciprocating cutting effect on the tissue 5, further improving the cutting effect of the tissue 5.

[0066] In some specific embodiments, the driving member includes a solenoid valve. It is understandable that after the solenoid valve is set, the power switch is continuously turned off or on by the control circuit, and the setting of the elastic member is coordinated to achieve the reciprocating motion of the push-pull rod 33 along its length direction, thereby achieving the reciprocating rotation motion of the cutter 2.

[0067] In some embodiments, Figure 6-Figure 8 As shown, the clamping structure 4 includes a cutting portion 43, which is arranged at one end of the puncture end 31 facing the cutter 2. The cutter 2 is an annular knife, and the cutting portion 43 can be fitted in the annular knife. The cutting portion 43 is provided with a cutting surface 431 at one end facing the cutter 2.

[0068] It is understandable that, in the process of cutting part of the tissue 5, according to the actual stomal caliber size requirements, when the diameter is relatively small, the cutting can be completed by punching in the direction perpendicular to the plane of the tissue 5, and a better stomal effect can also be achieved. In this embodiment, since the cutting portion 43 is arranged on the puncture end 31, the driving assembly can drive the puncture end 31 to move and drive the cutting portion 43 to pass through the tissue 5. At this time, the cutting portion 43 and the annular knife are respectively located on both sides of the tissue 5. At the same time, a cutting surface 431 is also provided at one end of the cutting portion 43 facing the cutter 2. When the operator pulls the puncture end 31 back, since the cutter 2 remains stationary, the cutting surface 431 on the cutting portion 43 will have a cutting effect on one side of the tissue 5. The tissue 5 moves relative to the cutter 2 under the drive of the cutting portion 43, so that the other side of the tissue 5 is also cut under the action of the cutter 2. As the driving assembly continues to move, since the cutting portion 43 can fit in the annular knife, when the tissue 5 that fits with the cutting portion 43 is cut, it will enter the annular knife driven by the cutting portion 43, thereby ensuring that the tissue 5 will not fall out of the human body, thereby achieving a better cutting effect and preventing the tissue 5 from remaining in the human body.

[0069] In some embodiments, Figure 7 and Figure 8 As shown, the cross-sectional area of ​​the connection between the puncture end 31 and the cutting portion 43 is the same as the cross-sectional area of ​​the cutting portion 43 , and the cross-sectional area of ​​the puncture end 31 gradually decreases in the direction away from the cutting portion 43 .

[0070] It can be understood that, through the above-mentioned structural setting, the resistance encountered by the cutting portion 43 when passing through the tissue 5 can be effectively reduced, so that the cutting portion 43 can pass through the tissue 5 more smoothly, thereby facilitating the subsequent cooperation with the cutting knife 2 to complete the cutting of the tissue 5, thereby improving the cutting effect of the tissue 5.

[0071] In some specific embodiments, Figure 8 As shown, a plurality of guide grooves 311 are provided on the outer peripheral surface of the puncture end 31 at intervals along the circumferential direction thereof, and the guide grooves 311 are extended in a direction away from the cutting portion 43. It can be understood that, since the size of the cutting portion 43 is relatively large, the provision of the guide grooves 311 can be more conducive to the puncture end 31 passing through the tissue 5, thereby facilitating the cutting portion 43 to pass through the tissue 5, thereby improving the cutting effect of the tissue 5.

[0072] In some specific embodiments, Figure 7 As shown, the cutting surface 431 of the annular knife is opened by its outer peripheral wall, and the cross-sectional area of ​​the outer peripheral wall of the annular knife gradually decreases in the direction approaching the cutting portion 43. The angle between the cutting surface 431 and the inner wall of the annular knife is 3°-5°, preferably 4°. In this way, the cutting effect of the annular knife and the cutting portion 43 on the tissue 5 can be improved when the annular knife and the cutting portion 43 cooperate while the annular knife remains stationary.

[0073] Embodiment 1:

[0074] Reference below Figure 1-Figure 2 A cardiac tissue stoma device according to one specific embodiment of the present invention is described.

[0075] The cardiac tissue ostomy device of this embodiment includes a catheter kit 1 , a drive assembly, a cutter 2 and a clamping structure 4 .

[0076] The catheter kit 1 includes a catheter assembly 11 and a rigid part 12. The rigid part 12 is connected to one end of the catheter assembly 11, and the rigid part 12 is provided with a mounting hole 121, and the drive assembly and the cutter 2 are both fitted in the mounting hole 121. The catheter assembly 11 includes a working catheter 111 and a fixed outer sleeve 112, and the fixed outer sleeve 112 is sleeved on the working catheter 111.

[0077] The drive assembly is arranged in the catheter set 1, and the drive assembly has a puncture end 31, and the puncture end 31 can puncture the tissue 5. The drive assembly includes a drive member, a push-pull rod 33 and an elastic member (not shown). The drive member is connected to the catheter set 1. The push-pull rod 33 is arranged at the end of the catheter set 1 and connected to the output end of the drive member, the puncture end 31 is arranged on the push-pull rod 33, and the cutter 2 is connected to the push-pull rod 33. One end of the elastic member is connected to the drive member, and the other end of the elastic member is connected to the push-pull rod 33.

[0078] The cutter 2 is connected to the output end of the driving assembly, and the driving assembly can drive the cutter 2 to move to cut the tissue 5. The cutter 2 includes a cutter body 21 and a transmission part 22. The cutter body 21 defines a matching hole 211. The transmission part 22 is inserted into the matching hole 211 and connected to the cutter body 21. The transmission part 22 is also connected to a push-pull rod 33. When the push-pull rod 33 moves along the axial direction of the matching hole 211, it can drive the transmission part 22 to rotate around the axis of the matching hole 211. The push-pull rod 33 is matched with the transmission part 22 through a non-self-locking spiral transmission pair 331.

[0079] The clamping structure 4 is provided on the puncture end 31 and is used to clamp the tissue 5 cut by the cutter 2. The clamping structure 4 includes a barb 41 provided on the outer peripheral wall of the puncture end 31, and the barb 41 extends from a direction away from the catheter set 1 and is bent in a direction close to the catheter set 1.

[0080] Embodiment 2:

[0081] Reference below Figure 3-Figure 5 A cardiac tissue stoma device according to another specific embodiment of the present invention is described.

[0082] The cardiac tissue ostomy device of this embodiment is substantially the same in structure as that of the embodiment. The difference between the two is the structure of the drive assembly and the clamping structure 4. Only the difference between the two is described here, and the structures of this embodiment that are the same as those of the embodiment will not be repeated here.

[0083] like Figure 3-Figure 5 As shown, there are multiple barbs 41, and the multiple barbs 41 are evenly distributed along the circumferential direction of the puncture end 31. The clamping structure 4 also includes a limiter 42, which is sleeved on the multiple barbs 41, and the limiter 42 is used to limit the barbs 41 to bounce outward along the radial direction of the puncture end 31. The driving assembly includes a handle 34 and a push-pull rod 33, the handle 34 is connected to the push-pull rod 33, and the end of the handle 34 is provided with the puncture end 31.

[0084] Embodiment 3:

[0085] Reference below Figure 6-Figure 8 A cardiac tissue stoma device according to another specific embodiment of the present invention is described.

[0086] The cardiac tissue ostomy device of this embodiment is substantially the same in structure as that of embodiment 1, and the difference between the two is the structure of the drive assembly and the clamping structure 4. Only the difference between the two is described here, and the structures of this embodiment that are the same as those of the embodiment will not be repeated here.

[0087] like Figure 6-Figure 8 As shown, the clamping structure 4 includes a cutting portion 43, which is arranged at one end of the puncture end 31 facing the cutter 2. The cutter 2 is an annular cutter, and the cutting portion 43 can be fitted in the annular cutter. A cutting surface 431 is provided at one end of the cutting portion 43 facing the cutter 2. The cross-sectional area of ​​the connection between the puncture end 31 and the cutting portion 43 is the same as the cross-sectional area of ​​the cutting portion 43. In the direction away from the cutting portion 43, the cross-sectional area of ​​the puncture end 31 gradually decreases. A plurality of guide grooves 311 are provided on the outer peripheral surface of the puncture end 31, which are arranged at intervals along the circumferential direction thereof, and the guide grooves 311 extend in the direction away from the cutting portion 43. The cutting surface 431 of the annular cutter is provided by its outer peripheral wall, and the cross-sectional area of ​​the outer peripheral wall of the annular cutter gradually decreases in the direction approaching the cutting portion 43.

[0088] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0089] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A cardiac tissue stoma device, characterized in that: include: Catheter kit (1); A cutter (2), the cutter (2) being arranged at an end of the catheter kit (1); A drive assembly, the drive assembly being arranged in the catheter kit (1), the drive assembly having a puncture end (31), and the drive assembly being capable of driving the cutter (2) to move relative to the tissue (5) so that the cutter (2) cuts the tissue (5); a clamping structure (4), the clamping structure (4) being arranged on the puncture end (31), the clamping structure (4) being used to clamp the tissue (5); The clamping structure (4) comprises a barb (41), the barb (41) being resettably arranged on the outer peripheral wall of the puncture end (31), the barb (41) extending in a direction away from the catheter set (1) and being bent in a direction approaching the catheter set (1); or, the clamping structure (4) comprises a cutting portion (43), the cutting portion (43) being arranged at one end of the puncture end (31) facing the cutter (2), the cutter (2) being an annular cutter, the cutting portion (43) being capable of fitting inside the annular cutter, and the cutting portion (43) being arranged at one end facing the cutter (2) with a cutting surface (431); The drive assembly comprises: A driving member, the driving member being connected to the catheter kit (1); A push-pull rod (33) is provided at the end of the catheter kit (1) and connected to the output end of the driving member, the puncture end (31) is provided on the push-pull rod (33), and the cutter (2) is connected to the push-pull rod (33).

2. The cardiac tissue stoma device according to claim 1, characterized in that: There are a plurality of barbs (41), and the plurality of barbs (41) are evenly distributed along the circumferential direction of the puncture end (31).

3. The cardiac tissue stoma device according to claim 2, characterized in that: The clamping structure (4) further comprises a limiting member (42), wherein the limiting member (42) is sleeved on the plurality of barbs (41), and the limiting member (42) is used to limit the barbs (41) from springing outwards in the radial direction of the puncture end (31).

4. The cardiac tissue stoma device according to claim 1, characterized in that: The cutter (2) comprises: A knife body (21), wherein the knife body (21) defines a matching hole (211); A transmission part (22), the transmission part (22) is inserted into the matching hole (211) and connected to the knife body (21), the transmission part (22) is connected to the push-pull rod (33), and the push-pull rod (33) can drive the transmission part (22) to rotate around the axis of the matching hole (211) when moving along the axial direction of the matching hole (211).

5. The cardiac tissue stoma device according to claim 4, characterized in that: The transmission part (22) cooperates with the push-pull rod (33) via a non-self-locking spiral transmission pair (331).

6. The cardiac tissue stoma device according to claim 1, characterized in that: The driving assembly also includes an elastic member, one end of which is connected to the driving member, and the other end of which is connected to the push-pull rod (33).

7. The cardiac tissue stoma device according to claim 1, characterized in that: The cross-sectional area of ​​the connection between the puncture end (31) and the cutting portion (43) is the same as the cross-sectional area of ​​the cutting portion (43), and the cross-sectional area of ​​the puncture end (31) gradually decreases in a direction away from the cutting portion (43).

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