CN113143410A - Heart tissue stoma device - Google Patents

Abstract

The invention discloses a cardiac tissue ostomy device, and relates to the technical field of medical instruments. The cardiac tissue ostomy device comprises a catheter kit, a driving assembly, a cutter and a clamping structure. The cutter is arranged at the end part of the catheter sleeve. The driving component is arranged in the catheter kit and provided with a puncture end, and the driving component 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 used for clamping tissues. The puncture end has a limiting effect on falling of the tissue after penetrating through the tissue, and one part of the clamping structure can play an anti-falling role on the tissue, so that the integrity of the tissue cut by the cutter can be ensured when the cutter cuts the tissue, the tissue is cut by the cutter smoothly, and the tissue cutting effect is also improved; after the cutting is finished, the tissue can be stably kept on the clamping structure in the process that the puncture end and the cutter are conveyed out of the human body by the catheter kit, so that the tissue is prevented from falling to form embolism, and the reliability of tissue cutting is improved.

Description

Heart tissue stoma device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a cardiac tissue ostomy device.

Background

The atrium shunting device is a new technology in the field of heart failure apparatus treatment in the world in the year, realizes left atrium blood shunting by weaving openings in heart groups, so that the left atrium pressure of a patient is effectively reduced, pulmonary congestion and pulmonary hypertension are relieved, the symptoms of the patient are improved, and the living standard is improved. It is often desirable to complete the stoma to the heart tissue and to try to avoid the problems of early occlusion that can occur with balloon dilation stomas and other complications that can arise with implanted ostomy devices.

Therefore, there is a need for a cardiac tissue ostomy device, which can realize a defective cardiac tissue weaving port by effective tissue cutting, and ensure that the cut tissue is completely retracted into the catheter and taken out of the body, so as to avoid the formation of stoma aperture occlusion and embolism, really realize "intervention without implantation", and enable a secondary operation.

Disclosure of Invention

The invention aims to provide a cardiac tissue ostomy device which can improve the cutting effect of tissues and ensure that the tissues are taken back and out of a body.

In order to achieve the technical effects, the technical scheme of the heart tissue ostomy device is as follows:

a cardiac tissue ostomy device comprising: a catheter assembly; the cutter is arranged at the end part of the catheter sleeve; the driving assembly is arranged in the catheter sleeve and is provided with a puncture end, and the driving 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 is used for clamping the tissue.

Further, clamping structure includes the barb, the barb can be established with restoreing on the periphery wall of puncture end, the barb is by keeping away from the direction of pipe external member is stretched out and is followed and be close the direction of pipe external member is buckled and is set up.

Further, the barb is a plurality of, and is a plurality of the barb is followed the circumference direction evenly distributed of puncture end.

Further, clamping structure still includes the locating part, the locating part cover is established a plurality ofly on the barb, the locating part is used for spacingly the barb is followed the radial direction of puncture end is outwards bounced.

Further, the drive assembly includes: a driver connected to the catheter hub; the push-pull rod is arranged at the end part of the catheter external member and connected with the output end of the driving member, the puncture end is arranged on the push-pull rod, and the cutter is connected with the push-pull rod.

Further, the cutter includes: a cutter body defining a mating bore; the transmission part penetrates through the matching hole and is connected with the cutter body, the transmission part is connected with the push-pull rod, and the push-pull rod can drive the transmission part to rotate around the axis of the matching hole when moving along the axial direction of the matching hole.

Further, the transmission part is matched with the push-pull rod through a non-self-locking screw transmission pair.

Furthermore, the driving assembly further comprises an elastic piece, one end of the elastic piece is connected with the driving piece, and the other end of the elastic piece is connected with the push-pull rod.

Further, clamping structure includes the cutting part, the cutting part is established puncture the end orientation the one end of cutter, the cutter is the annular sword, the cutting part can cooperate in the annular sword, the cutting part orientation the one end of cutter is equipped with the cutting plane.

Further, the cross-sectional area of the junction of the piercing end and the cutting portion is the same as the cross-sectional area of the cutting portion, the cross-sectional area of the piercing end gradually decreasing in a direction away from the cutting portion.

The invention has the beneficial effects that: the catheter kit can be convenient for carry cutter and clamping structure to the heart room along the blood vessel reliably in the heart operation to the tissue in the heart is cut to the cutter of being convenient for, also can be applicable to the cutting of other human internal tissues simultaneously, has improved the application scope of tissue cutting greatly. When the cutting knife and the clamping structure smoothly enter one side of the tissue to be cut, the driving assembly can drive the cutting knife to move, when the driving assembly works, the puncturing end firstly punctures the tissue and drives one part of the clamping structure to move to the other side of the tissue, and under the driving of the puncturing end, one part of the clamping structure can achieve a good grasping effect on the tissue in the process of penetrating the tissue or after moving to the other side of the tissue; thereafter, the drive assembly is capable of driving the cutting blade toward the tissue and cutting the tissue having the predetermined size. The puncture end penetrates through the tissue and then plays a limiting effect on the falling of the tissue, and one part of the clamping structure can play an anti-falling effect on the tissue, so that when the cutter cuts the tissue, the relatively soft tissue is difficult to generate relative displacement with the cutter, the completeness of the tissue cut by the cutter can be ensured, the cutter can successfully cut the tissue, and the tissue cutting effect is also improved; meanwhile, after the cutting is finished, in the process that the puncture end and the cutter are conveyed out of the human body by the catheter kit, the tissue can be stably kept on the clamping structure, so that the tissue is prevented from falling to form embolism, and the reliability of tissue cutting is improved.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of a cardiac tissue ostomy device provided in example 1 of the present invention;

FIG. 2 is a schematic sectional view showing a structure of a heart tissue ostomy device according to embodiment 1 of the present invention cutting tissue;

FIG. 3 is a schematic structural view of a cardiac tissue ostomy device provided in example 2 of the present invention;

FIG. 4 is one of schematic cross-sectional views showing a heart tissue ostomy device according to embodiment 2 of the present invention cutting tissue;

FIG. 5 is a second schematic sectional view showing the heart tissue ostomy device according to embodiment 2 of the present invention cutting tissue;

FIG. 6 is a schematic structural view of a cardiac tissue ostomy device provided in example 3 of the present invention;

FIG. 7 is a schematic sectional view showing a structure of a heart tissue ostomy device according to embodiment 3 of the present invention cutting tissue;

fig. 8 is a schematic structural diagram of a driving assembly and a clamping structure provided in embodiment 3 of the present invention.

Reference numerals

1. A catheter assembly; 11. a catheter assembly; 111. a working conduit; 112. fixing the outer sleeve; 12. a rigid portion; 121. mounting holes;

2. a cutter; 21. a cutter body; 211. a mating hole; 22. a transmission section;

31. a puncture end; 311. a guide groove; 32. a feeding member; 33. a push-pull rod; 331. the screw transmission pair is not self-locked; 34. a handle;

4. a clamping structure; 41. a barb; 42. a limiting member; 43. a cutting section; 431. cutting the surface;

5. and (4) organizing.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The specific structure of the cardiac tissue ostomy device according to the embodiment of the present invention will be described with reference to fig. 1 to 8.

As shown in fig. 1-8, fig. 1 discloses a cardiac tissue ostomy device comprising a catheter assembly 1, a drive assembly, a cutting blade 2 and a clamping structure 4. The cutter 2 is arranged at the end of the catheter sleeve 1. A drive assembly is provided in the catheter assembly 1, the drive assembly having a piercing end 31, the drive assembly being capable of driving the cutting blade 2 in a movement relative to the tissue 5 such that the cutting blade 2 cuts the tissue 5. A gripping structure 4 is provided on the piercing end 31, the gripping structure 4 being adapted to grip tissue 5.

It can be understood that the catheter kit 1 can facilitate reliable delivery of the cutting blade 2 and the clamping structure 4 along the blood vessel into the heart chamber during cardiac surgery, thereby facilitating cutting of the tissue 5 in the heart by the cutting blade 2, and simultaneously being applicable to cutting of other tissues 5 in the human body, and greatly improving the application range of cutting of the tissue 5. When the cutting knife 2 and the clamping structure 4 smoothly enter one side of the tissue 5 to be cut, the driving component can drive the cutting knife 2 to move, when the driving component works, the puncture end 31 firstly punctures the tissue 5 and drives one part of the clamping structure 4 to move to the other side of the tissue 5, and under the driving of the puncture end 31, one part of the clamping structure 4 can play a good anti-falling effect on the tissue 5 in the process of penetrating the tissue 5 or after moving to the other side of the tissue 5; thereafter, the drive assembly is capable of driving the cutting blade 2 towards the tissue 5 and cutting the tissue 5 having the predetermined size. Because the puncture end 31 has a limiting effect on falling of the tissue 5 after penetrating through the tissue 5, and one part of the clamping structure 4 can play an anti-falling role on the tissue 5, when the cutter 2 cuts the tissue 5, the relatively soft tissue 5 is difficult to generate relative displacement with the cutter 2, so that the completeness of the tissue 5 cut by the cutter 2 can be ensured, the tissue 5 can be cut by the cutter 2 smoothly, and the cutting effect of the tissue 5 is also improved; meanwhile, after the cutting is finished, in the process that the puncture end 31 and the cutter 2 are conveyed out of the human body by the catheter kit 1, the tissue 5 can be stably kept on the clamping structure 4, so that the tissue 5 is prevented from falling to form embolism, and the reliability of cutting the tissue 5 is improved.

When the heart tissue ostomy device of this embodiment weaves the mouth for heart group such as intracardiac room partition, accomplish the stoma through the sacculus expansion among the prior art relatively, because the cutter 2 of this embodiment can cut out defective type opening on tissue 5 for the occlusive phenomenon is difficult to appear in the opening, whole heart tissue ostomy device can completely shift out of the body after the cutting is accomplished simultaneously, realized not having implanted stoma, can prevent that implant from causing long-term thrombus and the complication problem that can't perform the operation once more in vivo, thereby ensured the many times reliable of operation and improved the success rate of operation. Meanwhile, the tissue 5 cut by the cutter 2 is physically cut, and compared with other cutting modes, the possibility of causing complication influence on the tissue 5 is low, and the safety of the operation can be ensured. Of course, the cardiac tissue ostomy device of the present embodiment is not limited to use in atrial septal stomas, but can be adapted for use in openings in other human tissue.

In some embodiments, as shown in fig. 1-5, the retaining structure 4 includes barbs 41, the barbs 41 being repositionable on the peripheral wall of the piercing end 31, the barbs 41 projecting away from the catheter assembly 1 and being angled in a direction toward the catheter assembly 1.

It will be appreciated that when the drive assembly drives the piercing end 31 to move within the tissue 5, the barbs 41 do not adversely affect the movement of the tissue 5 and are urged by the tissue 5 into proximity with the piercing end 31; after the drive assembly drives piercing end 31 to move to the other side of tissue 5, barbs 41 are no longer forced by tissue 5 and spring in a direction away from piercing end 31. When the cutter 2 cuts the tissue 5, the driving component, the catheter kit 1 and the cutter 2 move towards the outside of the body together with the cut tissue 5, and the ejected barbs 41 can ensure that the tissue 5 cannot slide off.

Of course, in other embodiments of the present invention, the holding structure 4 may also be configured as a spiral puncturing structure capable of cooperating with the tissue 5, and the specific structure of the holding structure 4 may be determined according to actual requirements.

Specifically, in the present embodiment, barbs 41 are made of thin steel wires that are stable in properties and easy to clean, and at the same time have good rigidity and elasticity, and can ensure springing up after passing through tissue 5, thereby ensuring a grasping effect on tissue 5. Of course, in other embodiments of the present invention, the material of barbs 41 may be determined according to actual surgical requirements, and need not be specifically limited herein.

In some embodiments, as shown in fig. 3-5, barbs 41 are multiple and multiple barbs 41 are evenly distributed along the circumferential direction of piercing end 31.

It will be appreciated that a plurality of barbs 41 can enhance the gripping of tissue 5 by the entire gripping structure 4 after barbs 41 have passed through tissue 5 to further enhance the gripping of tissue 5 by barbs 41, thereby further enhancing the cutting effect of tissue 5 and reducing the likelihood of tissue 5 sloughing.

In some embodiments, as shown in fig. 3 to 5, the clamping structure 4 further includes a limiting member 42, the limiting member 42 is disposed on the plurality of barbs 41, and the limiting member 42 is used for limiting the barbs 41 to spring outward along the radial direction of the piercing end 31.

It will be appreciated that, if barbs 41 have greater elasticity, piercing end 31 will not easily move barbs 41 within tissue 5, and retaining member 42 can act as a stop for the bounce of barbs 41 to ensure that piercing end 31 can reliably drive barbs 41 to pierce the other side of tissue 5. As shown in fig. 4 and 5, when the puncturing end 31 moves in the tissue 5, since the limiting member 42 is not connected to the puncturing end 31, the limiting member 42 will remain on one side of the tissue 5 under the limiting of the tissue 5, and the puncturing end 31 can only drive the plurality of barbs 41 to move to the other side of the tissue 5. Because barb 41 has great elasticity for acting force greatly increased that applys tissue 5 after barb 41 passes tissue 5, and can overcome the direct acting force that applys tissue 5 when cutting tissue 5 along the extending direction of puncture end 31 of cutter 2, make cutter 2 can accomplish the cutting of tissue 5 through the motion of rectilinear direction, from this, not only improved the cutting effect of tissue 5, still improved the cutting efficiency of tissue 5. In addition, because the cutting knife 2 in this embodiment can move in a linear direction to complete the cutting of the tissue 5, the driving assembly does not need to provide large power for the cutting knife 2, that is, as shown in fig. 3-5, the driving assembly in this embodiment can be directly formed as a handle 34 operated by a human, an operator can directly push the surgical handle to move in a linear direction to drive the cutting knife 2 to move in a linear direction, and in order to ensure that the cutting knife 2 can reliably cut the tissue 5, the operator can rotate the surgical handle and drive the cut tissue 5 to rotate and cut the remaining fibers to complete all cutting operations, so as to ensure that the cutting knife 2 cuts the tissue 5.

Specifically, in this embodiment, barbs 41 may be provided in an amount of 8-12, and the particular number of barbs 41 may be determined based on the actual tissue 5 being cut.

Specifically, in the present embodiment, after the plurality of barbs 41 are moved to the other side of the tissue 5, the distance between the tips of the barbs 41 and the central axis of the piercing 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 piercing end 31, so that smooth cutting of the tissue 5 can be ensured.

In some embodiments, the drive assembly includes a drive member (not shown) and a push-pull rod 33. The driver is connected to the catheter assembly 1. The push-pull rod 33 is arranged at the end part of the catheter suite 1 and is connected with the output end of the driving piece, the puncture end 31 is arranged on the push-pull rod 33, and the cutter 2 is connected with the push-pull rod 33.

In some embodiments, the driving member and the push-pull rod 33 are respectively disposed at two ends of the catheter assembly 1, so that an operator can control the movement of the cutting knife 2 and the puncturing end 31 at one end of the catheter assembly 1.

In some embodiments, the driver is disposed within the catheter hub 1, and the driver and the push-pull rod 33 are disposed at the same end of the catheter hub 1. It can be understood that, through the above-mentioned structural arrangement, the driving member can directly drive the push-pull rod 33 to move, and then the push-pull rod 33 can directly drive the cutter 2 to move, so as 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, and further improving the accuracy and sensitivity of the movement of the cutter 2, 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 hub 1 can be determined according to the actual operation requirements, and need not be specifically defined.

In some embodiments, as shown in fig. 2, the cutter 2 includes a cutter body 21 and a transmission portion 22. The cutter body 21 defines a mating bore 211. The transmission part 22 penetrates through the matching hole 211 and is connected with the cutter body 21, the transmission part 22 is connected with 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.

It can be understood that, because the transmission part 22 can drive the cutter body 21 to rotate around the axis of the fitting hole 211 under the driving of the driving part, the cutter body 21 can rotate relative to the tissue 5, and meanwhile, an operator can drive the catheter kit 1 to move along the axial direction thereof to drive the cutter 2 to move along the axial direction, so that the cutter body 21 can simultaneously rotate and move linearly relative to the tissue 5, and only can linearly cut or rotationally cut relative to the tissue 5 relative to a common cutting tool, thereby greatly improving the cutting effect of the cutter body 21 on the tissue 5. Meanwhile, the cutter body 21 defines the fitting hole 211, so that the cutting end of the cutter body 21 can be formed into a circular ring shape, thereby facilitating cutting of the circular tissue 5 and improving the cutting effect of the tissue 5. In some specific embodiments, as shown in fig. 1, the catheter assembly 1 includes a catheter assembly 11 and a rigid portion 12. The rigid part 12 is connected with one end of the duct assembly 11, the rigid part 12 is provided with a mounting hole 121, and the driving assembly and the cutter 2 are matched in the mounting hole 121.

It can be understood that the catheter assembly 11 can be conveniently operated in a human body, the mounting hole 121 formed in the rigid portion 12 can well protect the driving assembly and the cutter 2, the cutter 2 and the driving assembly can be prevented from interfering with the human body in the human body transportation process, damage to the human body is avoided, the driving assembly and the cutter 2 are prevented from being difficult to complete cutting work after being transported to the tissue 5, and therefore reliable cutting of the tissue 5 is guaranteed.

In some specific embodiments, the rigid portion 12 and the catheter assembly 11 are compression or glue bonded.

In some embodiments, as shown in FIG. 1, the catheter assembly 11 includes a working catheter 111 and a stationary outer sleeve 112, the stationary outer sleeve 112 being disposed over the working catheter 111.

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 an external device, but also avoids the problem of movement of the working catheter 111 during operation in a human body, thereby facilitating the rapid transportation of the cutting knife 2 and the clamping structure 4 to the tissue 5 and improving the cutting efficiency of the tissue 5.

In some embodiments, as shown in fig. 1, the driving assembly further includes a feeding element 32, the feeding element 32 is connected to the fixed outer sleeve 112 and the working catheter 111, and the feeding element 32 is configured to drive the working catheter 111 to move relative to the fixed sleeve, so as to drive the cutting blade 2 to move along the axial direction thereof, and thus, the operator can drive the cutting blade 2 to cut the tissue 5 linearly outside the human body. The structure of the feeding member 32 can adopt a driving structure in the prior art, and need not be described in detail herein.

In some embodiments, as shown in fig. 2, the push-pull rod 33 is engaged with the transmission portion 22 through a non-self-locking screw transmission pair 331.

It can be understood that, because the push-pull rod 33 is matched with the transmission part 22 through the non-self-locking screw transmission pair 331, the push-pull rod 33 can drive the transmission part 22 to rotate and drive the cutter body 21 to rotate when moving along a straight line, and after the cutter 2 moves under the driving of the catheter kit 1 and abuts against the tissue 5, the cutter 2 can perform a rotary motion relative to the tissue 5, so that a better cutting effect of the tissue 5 is realized through simple straight line driving. In addition, the non-self-locking screw transmission pair 331 has a higher lead angle, and can prevent the push-pull rod 33 from locking the transmission part 22 in the movement process, so as to ensure that the push-pull rod 33 can drive the transmission part 22 to do reciprocating rotation movement relative to the tissue 5, and further improve the cutting effect of the cutter body 21 on the tissue 5. Of course, in other embodiments of the present invention, the push-pull rod 33 and the transmission portion 22 may also realize the conversion between the linear motion and the rotational motion through other structures, and need not be limited in this respect.

In addition, in the present embodiment, since the aperture of the heart tissue weaving opening is usually smaller, so that the cutting range of the cutter 2 is also smaller, considering the material of the cutter body 21, if the cutter body 21 is directly matched with the push-pull rod 33, the production cost of the cutter body 21 will be greatly increased, in the present embodiment, the cutter 2 includes the cutter body 21 and the transmission part 22, and since the transmission part 22 does not need to consider the material and the processing technology of the cutter body 21, the cutter 2 can be kept at a lower production cost when the effect of rotating and cutting the cutter 2 is achieved.

Further, as shown in fig. 2, since the cutter 2 includes the transmission portion 22 and the cutter body 21, a limiting opening can be conveniently formed at a connection portion of the transmission portion 22 and the cutter body 21, a limiting protrusion matched with the limiting opening is provided on an inner peripheral wall of the rigid portion 12, and a limiting effect on relative displacement of the cutter 2 in the axial direction of the rigid portion 12 can be achieved through matching of the limiting opening and the limiting protrusion. Therefore, the structure of the transmission part 22 and the cutter body 21 can also facilitate the spacing effect between the cutter 2 and the rigid part 12, and the processing cost of the cutter is reduced. Of course, in other embodiments of the present invention, the limiting structure between the cutting knife 2 and the rigid part 12 may adopt other limiting structures in the mechanical field, and need not be limited specifically.

In some embodiments, the driving assembly further comprises 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.

It will be appreciated that when the driving member drives the push-pull rod 33 towards the tissue 5, the elastic member is compressed by the driving member; when the driving member stops the driving member's movement of the push-pull rod 33 toward the tissue 5, the elastic member rebounds and drives the push-pull rod 33 away from the tissue 5. Therefore, the push-pull rod 33 can reciprocate relative to the tissue 5 by cutting off and starting the driving piece, and then the cutter 2 can generate reciprocating rotation motion, so that the tissue 5 is cut back and forth, and the cutting effect of the tissue 5 is further improved.

In some specific embodiments, the driver comprises a solenoid valve. It can be understood that after the electromagnetic valve is arranged, the power switch is continuously switched off or on through the control circuit, and the reciprocating motion of the push-pull rod 33 along the length direction thereof can be better realized by matching with the arrangement of the elastic piece, so that the reciprocating rotation motion of the cutter 2 is further realized.

In some embodiments, as shown in fig. 6-8, the clamping structure 4 comprises a cutting portion 43, the cutting portion 43 is disposed at an end of the piercing end 31 facing the cutting blade 2, the cutting blade 2 is an annular blade, the cutting portion 43 can fit into the annular blade, and an end of the cutting portion 43 facing the cutting blade 2 is provided with a cutting surface 431.

It will be appreciated that, during the cutting of the portion of tissue 5, when its diameter is relatively small, it is possible to perform the cutting directly in a direction perpendicular to the plane of the tissue 5, in a die-cut manner, according to the requirements of the size of the aperture of the actual stoma, and also to achieve a better stoma result. In this embodiment, since the cutting portion 43 is disposed on the puncturing end 31, the driving assembly can drive the puncturing end 31 to move and drive the cutting portion 43 to penetrate through the tissue 5, at this time, the cutting portion 43 and the annular knife are respectively located at two sides of the tissue 5, and meanwhile, a cutting surface 431 is further disposed at one end of the cutting portion 43 facing the cutting knife 2, when the operator pulls the puncturing end 31 backwards, since the cutting knife 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 is driven by the cutting portion 43 to move relative to the cutting knife 2, so that the other side of the tissue 5 is also cut under the action of the cutting knife 2. Along with drive assembly's continuous motion, because cutting portion 43 can cooperate in the annular sword, when the tissue 5 with cutting portion 43 complex is cut down, it will get into in the annular sword under the drive of cutting portion 43 to ensure that tissue 5 can not fall from the human body, and then both played better cutting effect, also prevented that tissue 5 from remaining in the human body.

In some embodiments, as shown in fig. 7 and 8, the cross-sectional area where the piercing end 31 joins the cutting portion 43 is the same as the cross-sectional area of the cutting portion 43, the cross-sectional area of the piercing end 31 gradually decreasing in a direction away from the cutting portion 43.

It can be understood that, through the above structure, the resistance that receives when cutting portion 43 passes through tissue 5 can be well reduced, and cutting portion 43 can pass through tissue 5 relatively smoothly, so that the subsequent cutting of tissue 5 is completed in cooperation with cutting knife 2, and the cutting effect of tissue 5 is improved.

In some specific embodiments, as shown in fig. 8, the outer circumferential surface of the piercing end 31 is provided with a plurality of guide grooves 311 arranged at intervals along the circumferential direction, and the guide grooves 311 extend in a direction away from the cutting portion 43. It can be understood that, due to the relatively large size of the cutting portion 43, the guiding slot 311 is more beneficial for the piercing end 31 to penetrate through the tissue 5, so as to facilitate the cutting portion 43 to penetrate through the tissue 5, thereby improving the cutting effect of the tissue 5.

In some embodiments, as shown in fig. 7, the cutting surface 431 of the annular knife is formed by the outer peripheral wall of the annular knife, the cross-sectional area of the outer peripheral wall of the annular knife is gradually reduced in the direction approaching the cutting portion 43, and the included angle between the cutting surface 431 and the inner wall of the annular knife is 3-5 degrees, preferably 4 degrees, so that the cutting effect of the annular knife and the tissue 5 when the cutting portion 43 is matched can be improved in the state that the annular knife is kept in a stationary state.

Example 1:

a cardiac tissue ostomy device according to one embodiment of the invention will be described with reference to fig. 1-2.

The cardiac tissue ostomy device of the present embodiment comprises a catheter kit 1, a drive assembly, a cutting blade 2 and a clamping structure 4.

The catheter kit 1 comprises a catheter assembly 11 and a rigid part 12. The rigid part 12 is connected with one end of the duct assembly 11, the rigid part 12 is provided with a mounting hole 121, and the driving assembly and the cutter 2 are matched in the mounting hole 121. The catheter assembly 11 includes a working catheter 111 and a fixed outer sleeve 112, the fixed outer sleeve 112 being fitted over the working catheter 111.

A drive assembly is provided in the catheter assembly 1, the drive assembly having a piercing end 31, the piercing end 31 being capable of piercing tissue 5. The drive assembly comprises a drive member, a push-pull rod 33 and an elastic member (not shown). The driver is connected to the catheter assembly 1. The push-pull rod 33 is arranged at the end part of the catheter suite 1 and is connected with the output end of the driving piece, the puncture end 31 is arranged on the push-pull rod 33, and the cutter 2 is connected with the push-pull rod 33. 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.

The cutting knife 2 is connected with the output end of the driving component, and the driving component can drive the cutting knife 2 to move so as to cut the tissue 5. The cutter 2 includes a cutter body 21 and a transmission portion 22. The cutter body 21 defines a mating bore 211. The transmission part 22 penetrates through the matching hole 211 and is connected with the cutter body 21, the transmission part 22 is further connected with 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. The push-pull rod 33 is engaged with the transmission part 22 through the non-self-locking screw transmission pair 331.

A clamping structure 4 is provided on the piercing end 31, the clamping structure 4 being adapted to clamp the tissue 5 cut by the cutting blade 2. The holding structure 4 comprises barbs 41, the barbs 41 are arranged on the peripheral wall of the puncture end 31, and the barbs 41 extend from the direction away from the catheter hub 1 and are bent in the direction approaching the catheter hub 1.

Example 2:

a cardiac tissue ostomy device according to another embodiment of the invention will be described with reference to fig. 3-5.

The structure of the cardiac tissue ostomy device of the present embodiment is substantially the same as that of the embodiment, the difference between the structure of the driving assembly and the structure of the clamping structure 4 is described herein, and the structure of the present embodiment that is the same as that of the embodiment is not described herein again.

As shown in fig. 3 to 5, there are a plurality of barbs 41, and the plurality of barbs 41 are uniformly distributed along the circumferential direction of piercing end 31. The clamping structure 4 further includes a limiting member 42, the limiting member 42 is sleeved on the plurality of barbs 41, and the limiting member 42 is used for limiting the barbs 41 to bounce outwards along the radial direction of the piercing end 31. The driving assembly comprises a handle 34 and a push-pull rod 33, wherein the handle 34 is connected with the push-pull rod 33, and the end part of the handle 34 is provided with a puncture end 31.

Example 3:

a cardiac tissue ostomy device according to another embodiment of the invention will be described with reference to fig. 6-8.

The cardiac tissue ostomy device of the present embodiment has substantially the same structure as that of embodiment 1, and the difference between the structure of the driving assembly and the structure of the clamping structure 4 is only described herein.

As shown in fig. 6 to 8, the clamping structure 4 includes a cutting portion 43, the cutting portion 43 is disposed at an end of the puncturing end 31 facing the cutting knife 2, the cutting knife 2 is an annular knife, the cutting portion 43 can be fitted in the annular knife, and a cutting surface 431 is disposed at an end of the cutting portion 43 facing the cutting knife 2. The cross-sectional area of the junction of the piercing end 31 and the cutting portion 43 is the same as the cross-sectional area of the cutting portion 43, with the cross-sectional area of the piercing end 31 gradually decreasing in a direction away from the cutting portion 43. The outer peripheral surface of the piercing end 31 is provided with a plurality of guide grooves 311 arranged at intervals along the circumferential direction, and the guide grooves 311 extend in a direction away from the cutting part 43. The cutting surface 431 of the annular knife is opened by an outer peripheral wall thereof, and the cross-sectional area of the outer peripheral wall of the annular knife is gradually reduced in a direction approaching the cutting portion 43.

In the description herein, references to the description of "some embodiments," "other embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.

Claims (10)

1. A cardiac tissue ostomy device, comprising:

a catheter kit (1);

the cutter (2), the said cutter (2) is set up in the end of the said conduit external member (1);

a drive assembly provided in the catheter assembly (1), the drive assembly having a piercing end (31) and being capable of driving the cutting knife (2) in a movement relative to the tissue (5) so that the cutting knife (2) cuts the tissue (5);

a clamping structure (4), the clamping structure (4) being provided on the puncture end (31), the clamping structure (4) being for clamping the tissue (5).

2. A cardiac tissue ostomy device according to claim 1, wherein the clamping structure (4) comprises barbs (41), the barbs (41) being resettable on the peripheral wall of the puncture end (31), the barbs (41) protruding from a direction away from the catheter assembly (1) and being arranged bent in a direction towards the catheter assembly (1).

3. A cardiac tissue ostomy device according to claim 2, wherein the barbs (41) are plural, the plural barbs (41) being evenly distributed along the circumferential direction of the piercing end (31).

4. A cardiac tissue ostomy device according to claim 3, wherein the clamping structure (4) further comprises a limiting member (42), the limiting member (42) is sleeved on the plurality of barbs (41), the limiting member (42) is used for limiting the barbs (41) to bounce outwards along the radial direction of the piercing end (31).

5. The cardiac tissue ostomy device according to claim 1, wherein the drive assembly comprises:

a drive connected to the catheter assembly (1);

the utility model provides a pipe sleeve spare, including pipe sleeve spare (1), push-and-pull rod (33), establish push-and-pull rod (33) the tip of pipe sleeve spare (1) and with the output of driving piece is connected, puncture end (31) are established on push-and-pull rod (33), cutter (2) with push-and-pull rod (33) are connected.

6. The cardiac tissue ostomy device according to claim 5, wherein the cutting knife (2) comprises:

a cutter body (21), the cutter body (21) defining a mating bore (211);

the transmission part (22) penetrates through the matching hole (211) and is connected with the cutter body (21), the transmission part (22) is connected with 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).

7. The cardiac tissue ostomy device according to claim 6, wherein the transmission portion (22) cooperates with the push-pull rod (33) through a non-self-locking screw transmission pair (331).

8. The cardiac tissue ostomy device as set forth in claim 5, wherein the driving assembly further comprises an elastic member having one end connected to the driving member and the other end connected to the push-pull rod (33).

9. A cardiac tissue ostomy device according to claim 1, wherein the clamping structure (4) comprises a cutting portion (43), the cutting portion (43) being provided at an end of the piercing end (31) facing the cutting knife (2), the cutting knife (2) being a ring knife, the cutting portion (43) being fittable within the ring knife, an end of the cutting portion (43) facing the cutting knife (2) being provided with a cutting surface (431).

10. A cardiac tissue ostomy device according to claim 9, characterised in that the cross-sectional area of the connection of the piercing end (31) with the cutting portion (43) is the same as the cross-sectional area of the cutting portion (43), the cross-sectional area of the piercing end (31) decreasing in a direction away from the cutting portion (43).

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