Medical device

Abstract

The utility model relates to a medical device. The medical device includes an occlusion mechanism and a delivery mechanism. The plugging mechanism comprises a plugging assembly and a locking assembly, the plugging assembly can be compressed and extended in the axial direction, the locking assembly comprises a first connecting assembly and a second connecting assembly, and the near end of the first connecting assembly and the second connecting assembly can be locked so that the plugging assembly can be kept compressed in the axial direction; the conveying mechanism comprises a first buckling piece and a first driving piece, and the first driving piece movably penetrates through the first buckling piece; the first buckling piece and the second connecting assembly are detachably connected in a buckling mode, and the first driving piece and the first connecting assembly are detachably connected; the first driving piece is used for driving the first connecting assembly to be locked to the second connecting assembly; the first driving piece is further used for enabling the first buckling piece and the second connecting assembly to keep buckled connection or separation. The medical device is used for blocking a crack in a vascular membrane, and operation is convenient when the blocking mechanism is released.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a medical device. Background Art

[0002] Aortic dissection refers to a pathological change in which the blood in the aortic cavity enters the gap between the intima and the media from the tear in the aortic intima, causing the intima and the media to separate. Blood continues to enter the gap between the intima and the media, and the gap expands along the axial and radial directions of the aorta, thereby forming an aortic false lumen. For patients with aortic dissection in clinic, if the aortic intima is torn, it may lead to aortic dissection. If the blood vessels in aortic dissection rupture, the situation may be very critical, and hemorrhagic shock may occur, leading to severe lack of tissue perfusion. The appearance of aortic intima tear is a common cause of aortic dissection. With the development of interventional treatment, patients with aortic dissection can be treated by implanting an occluder.

[0003] However, after the medical device provided by the related art has sealed the rupture, the withdrawal of the delivery mechanism of the medical device from the human body is cumbersome and inconvenient, which may prolong the operation time and increase the risk of complications. Utility Model Content

[0004] The utility model aims at the defects of the related technology and provides a medical device. The medical device of the present application is used for blocking the rupture on the blood vessel membrane, has high reliability and is easy to operate when releasing the blocking mechanism.

[0005] The medical device includes a blocking mechanism and a conveying mechanism; the blocking mechanism includes a blocking component and a locking component, the blocking component can be compressed and extended in the axial direction, the locking component includes a first connecting component and a second connecting component, the second connecting component is fixedly connected to the proximal end of the blocking component, the first connecting component is arranged inside the blocking component, the distal end of the first connecting component is fixedly connected to the distal end of the blocking component, and the proximal end of the first connecting component can be locked with the second connecting component to keep the blocking component axially compressed; the conveying mechanism includes a first buckling member and a first driving member, the first driving member is movably inserted into the first buckling member; the first buckling member and the second connecting component are detachably buckled and connected, and the first driving member and the first connecting component are detachably connected; the first driving member is used to drive the first connecting component to be locked to the second connecting component; the first driving member is also used to keep the first buckling member and the second connecting component in a buckled connection or separation.

[0006] In some embodiments, a first connecting groove is provided on the first fastening member, and the first fastening member also includes a first fastening portion located at the distal end of the first connecting groove; a second connecting component is provided on the second connecting component, and the second connecting component also includes a second fastening portion located at the proximal end of the second connecting groove; the first fastening member and the second connecting component have a fastening state and a separation state; in the fastening state, the first fastening portion is connected to the second connecting groove, and the second fastening portion is connected to the first connecting groove; in the separation state, the first fastening portion is withdrawn from the second connecting groove, and the second fastening portion is withdrawn from the first connecting groove.

[0007] In some embodiments, the first snap-fitting portion is provided with a first avoidance gap, and the first avoidance gap is connected to the first connecting groove; the second snap-fitting portion is provided with a second avoidance gap, and the second avoidance gap is connected to the second connecting groove; the first avoidance gap is used to avoid the second connecting component, and the second avoidance gap is used to avoid the first snap-fitting component.

[0008] In some embodiments, the bottom surface of the first avoidance gap is positioned on the side groove surface of the second connecting groove, and the bottom surface of the second avoidance gap is positioned on the side groove surface of the first connecting groove.

[0009] In some embodiments, the bottom surface of the first avoidance gap is a plane or an arc surface, and the side groove surface of the second connecting groove corresponds thereto; the bottom surface of the second avoidance gap is a plane or an arc surface, and the side groove surface of the first connecting groove corresponds thereto.

[0010] In some embodiments, the first connecting component includes a locking member that can be elastically deformed, and the second connecting component is provided with a locking cavity, and the locking member is locked to the locking cavity by elastic deformation, so that the first connecting component and the second connecting component are locked.

[0011] In some embodiments, the second connecting component is also provided with a first connecting hole, the first connecting hole is communicated with the locking cavity, the first connecting hole is arranged at the distal end relative to the locking cavity, and the radial direction of the first connecting hole is smaller than the inner diameter of the locking cavity; the locking piece can be radially contracted and passed through the first connecting hole, and the locking piece can be radially expanded in the locking cavity so that the first connecting component is locked to the second connecting component.

[0012] In some embodiments, the first connecting component also includes a second driving member, the second driving member is fixedly connected to the locking member, and the first driving member is connected to the locking member through the second driving member; the first driving member drives the second driving member to move, and the second driving member drives the locking member to move, so as to achieve the locking member being locked to the locking cavity.

[0013] In some embodiments, the second connecting assembly is further provided with a second connecting hole, and the second connecting hole is communicated with the locking cavity; the outer wall of the first driving member is provided with an elastic structure that is locked or unlocked relative to the second connecting hole through elastic deformation.

[0014] In some embodiments, the delivery mechanism further comprises an outer sheath, and the blocking mechanism is axially compressed in the outer sheath.

[0015] In some embodiments, the blocking assembly includes a proximal blocking portion, a waist and a distal blocking portion, the waist is connected between the proximal blocking portion and the distal blocking portion, and the radial dimensions of the proximal blocking portion and the distal blocking portion are greater than the radial dimension of the waist.

[0016] In some embodiments, the outer circumferential wall and / or the inner circumferential wall of the proximal blocking portion, the waist portion and the distal blocking portion are provided with a membrane structure, and the membrane structure is used to prevent blood from passing through.

[0017] Beneficial effects: The medical device includes a blocking mechanism and a conveying mechanism. The blocking mechanism includes a blocking component and a locking component. The blocking component can be extended axially to conveniently pass through the tear in the vascular membrane and enter the true lumen of the blood vessel. The locking component includes a first connecting component and a second connecting component. The first connecting component is arranged inside the blocking component, and the distal end of the first connecting component is fixedly connected to the distal end of the blocking component. The proximal end of the first connecting component gradually approaches the second connecting component, and the blocking component is gradually compressed axially until the proximal end of the first connecting component and the second connecting component are locked, so that the blocking component maintains axial compression. The blocking component can clamp the vascular membrane on both sides of the tear to achieve blocking of the tear on the vascular membrane and prevent blood from flowing from the vascular membrane into the vascular dissection, with high reliability.

[0018] The conveying mechanism includes a first buckle and a first driving member, the first driving member is movably inserted into the first buckle; the first buckle and the second connecting component are detachably buckled and connected, and the first driving member and the first connecting component are detachably connected; the first driving member is used to drive the first connecting component to be locked to the second connecting component; the first driving member is also used to keep the first buckle and the second connecting component in a buckled connection or separated. When releasing the blocking mechanism, it is only necessary to withdraw the first driving member from the docking point of the first buckle and the second connecting component, and the first buckle and the second connecting component can be released from the fixed connection, and the first buckle can be separated from the second connecting component, which is easy to operate. Therefore, the medical device in the present application can quickly unlock the blocking mechanism and the conveying mechanism, reduce the time to withdraw the conveying mechanism from the body after the medical device is released, reduce the operation time, quickly restore blood supply, and reduce surgical complications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiments of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of the structure of one of the blood vessels in the human body;

[0021] Figure 2 One embodiment of the present application provides a medical device positioned at Figure 1 Schematic diagram of the structure of the blood vessels shown;

[0022] Figures 3 to 5 is a cross-sectional view of a medical device provided by an embodiment of the present application in different states;

[0023] Figure 6 is a cross-sectional view of a second connecting component provided in one embodiment of the present application;

[0024] Figure 7 is a cross-sectional view of a first fastening member provided in one embodiment of the present application;

[0025] Figure 8 is a schematic diagram of the exploded three-dimensional structure of the second connecting component and the first fastening component in one embodiment of the present application;

[0026] Fig. 9 is a schematic diagram of a three-dimensional structure explosion of a second connecting component and a first fastening component in another embodiment of the present application;

[0027] Fig.10 is a cross-sectional view of a second connecting component and a first fastening member in another embodiment of the present application;

[0028] Fig.11 is a partial cross-sectional view of a first driving member provided in another embodiment of the present application;

[0029] Fig.12 is a cross-sectional view of a medical device provided by another embodiment of the present application;

[0030] Figures 13 to 15 It is a schematic diagram of the process of releasing the blocking mechanism. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] The following descriptions of the embodiments are made with reference to the attached drawings to illustrate specific implementations of the present application. Directional terms mentioned in the present application, such as "top", "bottom", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and should not be understood as a limitation on the present application.

[0033] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set on..." 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; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be an internal connection between two elements.

[0034] In the field of medical device technology, the proximal end of a medical device refers to the end closer to the operator, while the distal end of a medical device refers to the end farther from the operator. Axial refers to the direction of the central axis of the device, radial refers to the direction perpendicular to the axial direction and where the radius or diameter is located, and circumferential refers to the direction perpendicular to and surrounding the axial direction. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] See also Figure 1 , Figure 1Schematic diagram of one of the blood vessels 200 in the human body. The blood vessels in the human body originate from the heart and branch continuously. The blood vessels branch into a large number of capillaries and are distributed to various tissues throughout the body. The heart plays the role of a blood pump and transports blood to various tissues throughout the body through the blood vessels. Although the functions and tissue structures of the blood vessels 200 are not exactly the same, the blood vessels 200 basically include multiple vascular membranes. More specifically, the blood vessels 200 include an intima 201, a middle membrane 202, and an adventitia. Vascular dissection is caused by the partial tearing of the intima 201 to form a rift 203. The rift 203 is impacted by blood, and blood continuously enters the gap between the intima 201 and the middle membrane 202 from the rift 203. The middle membrane 202 gradually peels off the intima 201 and gradually expands, so that the gap between the intima 201 and the middle membrane 202 expands along the axial direction and radial direction of the blood vessel 200, thereby forming a vascular false lumen 205 and a vascular true lumen 206 on both sides of the intima 201. The vascular false lumen 205 is located between the intima 201 and the media 202, the vascular true lumen 206 is located on the side of the intima 201 away from the vascular false lumen 205, and the vascular false lumen 205 and the vascular true lumen 206 are connected through the cleft 203. If the blood vessel 200 is located near the aorta of the human body, since the aorta bears the pressure from the beating heart, the blood flow is huge. If the blood continues to impact the cleft 203, it may cause the media 202 and the adventitia of the aortic dissection to rupture, and the patient's condition will be very critical, and hemorrhagic shock will occur, resulting in severe lack of tissue perfusion.

[0036] See also Figure 1 and Figure 2 , Figure 2 The medical device 100 provided in one embodiment of the present application is positioned at Figure 1 In the structural schematic diagram of the blood vessel shown, the medical device 100 is located at the rupture 203 of the blood vessel 200 , and the medical device 100 is passed to block the rupture 203 .

[0037] In some embodiments, please refer to Figures 3 to 6 The medical device 100 includes a blocking mechanism 10, which includes a blocking component 11. The blocking component 11 is a deformable structure that can be axially compressed and extended. Figure 3 As shown, the blocking component 11 is stretched in the axial direction, the radial dimension is reduced, and the blocking component 11 is stretched straight and roughly presents a linear structure. This design is convenient for transportation and can shrink the radial dimension of the blocking component 11 to a diameter smaller than the caliber of the rupture 203, so that at least part of the blocking component 11 can pass through the rupture 203 on the blood vessel 200, and at least part of the blocking component 11 can be positioned in the false lumen 205 of the blood vessel. Then, the blocking component 11 is compressed in the axial direction, and the radial dimension is increased, so that the blocking component 11 can be close to the inner membrane 201 on the opposite sides of the rupture 203, thereby blocking the rupture 203.

[0038] In some examples, the blocking assembly 11 includes a proximal blocking portion 112, a waist 113 and a distal blocking portion 114, the waist 113 is connected between the proximal blocking portion 112 and the distal blocking portion 114, and the radial dimensions of the proximal blocking portion 112 and the distal blocking portion 114 are greater than the radial dimensions of the waist 113. The distal blocking portion 114 can be extended in the axial direction, and can make the distal blocking portion 114 smaller than the diameter of the cleft 203, so that the distal blocking portion 114 and the waist portion 113 can pass through the cleft 203; when the waist portion 113 is inserted into the cleft 203, the distal blocking portion 114 is located in the vascular false lumen 205, and the proximal blocking portion 112 is located in the vascular true lumen 206, that is, the proximal blocking portion 112 and the distal blocking portion 114 are respectively located on both sides of the vascular membrane; then, the blocking component 11 is compressed in the axial direction, and the proximal blocking portion 112 and the distal blocking portion 114 are pressed against each other to clamp the inner membrane 201 on the opposite sides of the cleft 203, thereby blocking the cleft 203. In other examples, the proximal blocking portion 112 and the distal blocking portion 114 can also be extended in the axial direction or compressed in the axial direction together. The blocking component 11 is integrally formed, that is, the proximal blocking portion 112, the waist portion 113 and the distal blocking portion 114 are integrally formed. This design can improve the strength of the proximal blocking portion 112, the waist portion 113 and the distal blocking portion 114, and avoid damage and breakage of the blocking component 11.

[0039] The blocking component 11 as a whole can be a mesh structure formed by weaving elastic elongated pieces, and the outer surfaces of the mesh structure formed by the blocking component 11 can be bent toward each other, and the proximal blocking portion 112 and the distal blocking portion 114 can be matched and abutted during the bending process to clamp the inner membrane 201. The elastic elongated pieces can be made of nickel, titanium or other suitable metal or alloy materials.

[0040] Since the mesh structure includes a plurality of mesh holes, the mesh holes are connected to the interior of the plugging component 11, and a membrane structure is provided on the outer peripheral wall and / or the inner peripheral wall of the proximal plugging portion 112, the waist portion 113, and the distal plugging portion 114. The membrane structure can prevent blood from entering the interior of the plugging component 11 from the hole structure, thereby preventing blood from passing through the crack 203, so as to achieve a better plugging effect. In addition, the provision of the membrane structure can enhance the resistance between the membrane structure and the vascular membrane, prevent the occluding component 11 from moving relative to the vascular membrane, thereby enhancing the firmness of the occluding component 11 on the vascular membrane, and can also prevent the membrane structure from being torn to a certain extent.

[0041] In some embodiments, see Figures 1 to 5 The blocking mechanism 10 further includes a locking assembly 13, which includes a first connecting assembly 132 and a second connecting assembly 133. The second connecting assembly 133 is fixedly connected to the proximal end of the blocking assembly 11. The first connecting assembly 132 is disposed inside the blocking assembly 11, and the distal end of the first connecting assembly 132 is fixedly connected to the distal end of the blocking assembly 11. Figure 3As shown, the blocking component 11 is in an axially extended state, the first connecting component 132 and the second connecting component 133 are far apart, the proximal blocking portion 112 and the distal blocking portion 114 are slender, and the blocking component 11 is stretched straight and roughly presents a linear structure.

[0042] like Figure 4 As shown, the blocking component 11 switches from the axially extended state to the axially compressed state, the first connecting component 132 and the second connecting component 133 are close to each other, the proximal blocking portion 112 and the distal blocking portion 114 are shortened in the axial direction and expanded in the radial direction, and the blocking component 11 is a double-layer disc-shaped structure. Figure 5 As shown, the first connecting component 132 and the second connecting component 133 are locked, and the first connecting component 132 and the second connecting component 133 remain fixedly connected, the sealing component 11 maintains axial compression, and the proximal sealing portion 112 and the distal sealing portion 114 abut against each other, so that the proximal sealing portion 112 and the distal sealing portion 114 can clamp the inner membrane 201, so that the proximal sealing portion 112 and the distal sealing portion 114 are respectively attached to the inner membrane 201 on the opposite sides of the rupture 203, thereby sealing the rupture 203.

[0043] In some embodiments, please refer to Figures 3 to 7 The medical device 100 further includes a conveying mechanism 30. The conveying mechanism 30 includes a first fastening member 31 and a first driving member 33, and the first driving member 33 is movably disposed in the first fastening member 31. The first fastening member 31 and the second connecting component 133 are detachably fastened and connected, and the first driving member 33 and the first connecting component 132 are detachably connected; the first driving member 33 is used to drive the first connecting component 132 to lock to the second connecting component 133; the first driving member 33 is also used to keep the first fastening member 31 and the second connecting component 133 in a fastening connection or separation.

[0044] Specifically, the second connecting component 133 is a cylindrical structure, and the second connecting component 133 is arranged at the proximal end of the blocking component 11 and is fixedly connected to the proximal blocking portion 112, that is, at least part of the second connecting component 133 is located inside the blocking component 11. In the case where part of the second connecting component 133 is located inside the blocking component 11, the rest of the second connecting component 133 is exposed to the blocking component 11. The part of the second connecting component 133 located inside the blocking component 11 is used to lock with the first connecting component 132, and the part of the second connecting component 133 exposed to the blocking component 11 is used to be detachably fastened and connected with the first fastening member 31. The second connecting component 133 is defined with a first through hole 1333, and the first through hole 1333 penetrates the second connecting component 133 along the axial direction of the second connecting component 133. The part of the second connecting component 133 exposed to the blocking component 11 is also provided with a second connecting groove 1334, and the second connecting component 133 also includes a second fastening portion 1335 located at the proximal end of the second connecting groove 1334. The second connecting groove 1334 is communicated with the first penetration hole 1333 , and the first penetration hole 1333 passes through the second buckling portion 1335 .

[0045] The first fastening member 31 is a tubular structure, and the first fastening member 31 defines a second through hole 313, and the second through hole 313 penetrates the first fastening member 31 along the axial direction of the first fastening member 31. The first fastening member 31 is provided with a first connecting groove 314 near its distal end, and the first fastening member 31 also includes a first fastening portion 315 located at the distal end of the first connecting groove 314. The first connecting groove 314 is connected to the second through hole 313, and the second through hole 313 penetrates the first fastening portion 315. Among them, the first fastening portion 315 can be positioned in the second connecting groove 1334, and the second fastening portion 1335 can be positioned in the first connecting groove 314. In other words, the second connecting component 133 and the first fastening member 31 are hooked together to limit the axial movement of each other.

[0046] The first driving member 33 is a rod-shaped structure, and the first driving member 33 is inserted into the first buckle member 31 and the second connecting component 133. The distal end of the first driving member 33 is detachably connected to the first connecting component 132. The first driving member 33 can drive the first connecting component 132 to move proximally or distally relative to the second connecting component 133, so that the blocking component 11 is axially compressed or axially extended. Specifically, when the first driving member 33 drives the first connecting component 132 to move distally, the first connecting component 132 drives the blocking component 11 to extend axially, and the blocking component 11 is straightened and roughly linear. When the first driving member 33 drives the first connecting component 132 to move proximally, the first connecting component 132 drives the blocking component 11 to compress axially until the proximal end of the first connecting component 132 can be locked with the second connecting component 133. After locking, the blocking component 11 maintains an axially compressed state. In other examples, the first driving member 33 is constructed to be connected to a driving device, which provides driving force for the first driving member 33 , and the first driving member 33 can move proximally or distally relative to the first buckling member 31 and the second connecting assembly 133 .

[0047] The first fastening member 31 and the second connecting component 133 have a fastening state and a separation state. When the first fastening member 31 and the second connecting component 133 are in the fastening state, the first fastening portion 315 is used to be accommodated in the second connecting groove 1334, and the second fastening portion 1335 is used to be accommodated in the first connecting groove 314. The first driving member 33 is penetrated through the first through hole 1333 and the second through hole 313, thereby limiting the separation of the first fastening member 31 and the second connecting component 133, and maintaining the fastening connection between the second connecting component 133 and the first fastening member 31. If the second connecting component 133 and the first fastening member 31 are to be separated, the first driving member 33 is moved toward the proximal end and at least completely withdrawn to the portion of the second through hole 313 located at the proximal end of the first connecting groove 314, so that the first fastening portion 315 can be radially withdrawn from the second connecting groove 1334, and the second fastening portion 1335 can be radially withdrawn from the second connecting groove 1334, thereby separating the second connecting component 133 and the first fastening member 31 from each other, and the first fastening member 31 and the second connecting component 133 are in a separated state.

[0048] In some connection modes of the first connection component 132 and the second connection component 133, please refer to Figures 3 to 5 The first connecting assembly 132 further includes a locking member 1322, the proximal end of the locking member 1322 is detachably connected to the first driving member 33, and the distal end of the locking member 1322 is connected to the distal end of the distal blocking portion 114. At least part of the locking member 1322 is elastic. The second connecting assembly 133 is provided with a locking cavity 1330. The locking member 1322 is locked to the locking cavity 1330 by elastic deformation, so that the first connecting assembly 132 is locked with the second connecting assembly 133.

[0049] The locking member 1322 may be elastic as a whole, and the locking member 1322 may be elastically deformed as a whole. The locking member 1322 may also be partially elastic and the other partially rigid, that is, a portion of the locking member 1322 may be elastically deformed. When the locking member 1322 is subjected to an external radial / axial extrusion force, the locking member 1322 may reduce its radial / axial dimensions due to elastic deformation; when the locking member 1322 cancels the external radial / axial extrusion force, the locking member 1322 may expand its radial / axial dimensions due to elastic deformation. For another example, when the locking member 1322 is subjected to an external radial / axial pulling force, the locking member 1322 may expand its radial / axial dimensions due to elastic deformation; when the locking member 1322 cancels the external radial / axial pulling force, the locking member 1322 may reduce its radial / axial dimensions due to elastic deformation.

[0050] Further, the locking member 1322 includes a first connecting portion 1323 and a second connecting portion 1324 disposed at opposite ends thereof, and a locking portion 1325 connected between the first connecting portion 1323 and the second connecting portion 1324. When the locking member 1322 is not pressed by an external force, the radial dimension of the locking portion 1325 is greater than the radial dimension of the first connecting portion 1323 and the second connecting portion 1324, and the radial dimension of the second connecting portion 1324 is smaller than the radial dimension of the locking cavity 1330. The first connecting portion 1323 is fixedly connected to the distal end of the distal blocking portion 114, and the second connecting portion 1324 is detachably connected to the distal end of the first driving member 33. The locking portion 1325 is an elastic structure that can be elastically deformed, and the radial / axial dimension of the locking portion 1325 can be enlarged or reduced due to elastic deformation. The first driving member 33 can move axially relative to the first buckling member 31, and the first driving member 33 drives the locking member 1322 to move, and the locking member 1322 drives the distal blocking portion 114 to move, so that the relative distance between the distal blocking portion 114 and the proximal blocking portion 112 can be adjusted, and the relative distance between the locking member 1322 and the second connecting component 133 can also be adjusted. When the locking member 1322 is locked in the locking cavity 1330, the relative distance between the distal blocking portion 114 and the proximal blocking portion 112 is locked, and the relative distance between the locking member 1322 and the second connecting component 133 is locked, and at this time, the distal blocking portion 114 and the proximal blocking portion 112 clamp each other.

[0051] In some embodiments, see Figure 5The second connection assembly 133 is further provided with a first connection hole 1332, the first connection hole 1332 is connected with the locking cavity 1330, the first connection hole 1332 is arranged at the distal end relative to the locking cavity 1330, and the radial direction of the first connection hole 1332 is smaller than the inner diameter of the locking cavity 1330. When the locking member 1322 is not squeezed by an external force, the radial dimension of the locking portion 1325 is larger than the radial dimension of the first connection hole 1332 and the locking cavity 1330, and the radial dimension of the second connection portion 1324 is smaller than the radial dimension of the first connection hole 1332 and the locking cavity 1330. The first driving member 33 drives the locking member 1322 to move toward the proximal end, the second connection portion 1324 passes through the first connection hole 1332, the locking portion 1325 is squeezed by the inner wall of the first connection hole 1332, the locking portion 1325 contracts in the radial direction, the locking portion 1325 passes through the first connection hole 1332, and the locking portion 1325 expands in the locking cavity 1330 in the radial direction. After the locking portion 1325 enters the locking cavity 1330, the inner wall of the first connecting hole 1332 prevents the locking portion 1325 from moving toward the distal end, and the locking portion 1325 is fixed in the locking cavity 1330, so that the first connecting component 132 is locked to the second connecting component 133, thereby achieving the locking of the distal blocking portion 114 and the proximal blocking portion 112. The degree to which the locking portion 1325 is received in the locking cavity 1330 can adjust the clamping force of the distal blocking portion 114 and the proximal blocking portion 112, that is, when the locking portion 1325 completely enters the locking cavity 1330, the clamping force of the distal blocking portion 114 and the proximal blocking portion 112 is the maximum.

[0052] In some embodiments, the first connecting assembly 132 further includes a second driving member 1326, the second driving member 1326 is fixedly connected to the locking member 1322, and the first driving member 33 is connected to the locking member 1322 via the second driving member 1326. The first driving member 33 drives the second driving member 1326 to move, and the second driving member 1326 drives the locking member 1322 to move, so that the locking member 1322 is locked to the locking cavity 1330.

[0053] Specifically, the second driving member 1326 is provided with a fixing groove at its distal end, and the second connecting portion 1324 of the locking member 1322 is fixed in the fixing groove, so that the locking member 1322 and the second driving member 1326 are fixedly connected. The second connecting portion 1324 can be fixed in the fixing groove by, but not limited to, clamping, welding or other methods. The second driving member 1326 is provided with a threaded hole at its proximal end, and the outer wall of the first driving member 33 near the distal end is provided with an external thread, and the first driving member 33 is detachably connected to the second driving member 1326 through the cooperation of the threaded hole and the external thread. In other examples, the outer wall of the second driving member 1326 is provided with an external thread, and the first driving member 33 is provided with a threaded hole at its distal end, and the first driving member 33 is detachably connected to the second driving member 1326 through the cooperation of the threaded hole and the external thread. When the first driving member 33 and the second driving member 1326 are separated, the first driving member 33 only needs to be rotated, and the first driving member 33 can be released from the second driving member 1326.

[0054] In some embodiments, see Figure 6 and Figure 7 The first buckling part 315 is provided with a first avoidance gap 316, which is connected to the first connecting groove 314 and is used to avoid the second connecting component 133. The second buckling part 1335 is provided with a second avoidance gap 1336, which is connected to the second connecting groove 1334 and is used to avoid the first buckling member 31. Therefore, when the first buckling member 31 and the second connecting component 133 are in a buckled state, the outer periphery of the first buckling member 31 and the outer periphery of the second connecting component 133 can be roughly on the same outer periphery, so that the overall appearance of the first buckling member 31 and the second connecting component 133 is more unified, and the misalignment and seam at the joint are reduced. The bottom surface 3161 of the first avoidance gap 316 is positioned on the side groove surface of the second connecting groove 1334, and the bottom surface 1336a of the second avoidance gap 1336 is positioned on the side groove surface of the first connecting groove 314. The first avoidance gap 316 and the second avoidance gap 1336 can prevent the second connecting component 133 and the first fastening component 31 from interfering with each other.

[0055] For example, see Figure 8, the bottom surface 3161 of the first avoidance gap 316 is a plane, the side groove surface of the second connection groove 1334 is a plane, and the bottom surface 3161 of the first avoidance gap 316 and the side groove surface of the second connection groove 1334 fit together and abut against each other. The bottom surface 1336a of the second avoidance gap 1336 is a plane, the side groove surface of the first connection groove 314 is a plane, and the bottom surface 1336a of the second avoidance gap 1336 and the side groove surface of the first connection groove 314 fit together and abut against each other. In this example, the first buckling portion 315 and the second buckling portion 1335 are complementary hook-type buckles. After the two hook-type buckles are buckled together, they form the first through hole 1333 and the second through hole 313. The first driving member 33 is inserted into the first through hole 1333 and the second through hole 313, so that the first buckling member 31 can maintain connection with the second connection component 133.

[0056] For example, see Fig. 9 , the bottom surface 3161 of the first avoidance notch 316 is an arc surface, the side groove surface of the second connection groove 1334 is an arc surface, and the bottom surface 3161 of the first avoidance notch 316 and the side groove surface of the second connection groove 1334 fit together and abut. The bottom surface 1336a of the second avoidance notch 1336 is an arc surface, the side groove surface of the first connection groove 314 is an arc surface, and the bottom surface 1336a of the second avoidance notch 1336 and the side groove surface of the first connection groove 314 fit together and abut. In this example, after the first buckling portion 315 and the second buckling portion 1335 are buckled, the first driving member 33 is inserted into the first through hole 1333 and the second through hole 313, so that the first buckling member 31 can maintain connection with the second connection component 133. Compared with a plane, the arc surface can make the transition between the second connection component 133 and the first buckling member 31 smoother when they are buckled or separated from each other. In other examples, the bottom surface 3161 of the first avoidance notch 316 is an arc surface, the side groove surface of the second connection groove 1334 is an arc surface, the bottom surface 1336a of the second avoidance notch 1336 is a plane, and the side groove surface of the first connection groove 314 is a plane. Alternatively, the bottom surface 3161 of the first avoidance notch 316 is a plane, the side groove surface of the second connection groove 1334 is a plane, the bottom surface 1336a of the second avoidance notch 1336 is an arc surface, and the side groove surface of the first connection groove 314 is an arc surface.

[0057] In some embodiments, see Fig.10 and Fig.11The second connecting component 133 is also provided with a second connecting hole 1337, which is connected to the locking cavity 1330, and the aperture of the second connecting hole 1337 is smaller than the radial dimension of the locking cavity 1330; the outer wall of the first driving member 33 is provided with an elastic structure 333 that is locked or unlocked relative to the second connecting hole 1337 by elastic deformation. During the process of the first fastening member 31 being released relative to the second connecting component 133, the elastic structure 333 clamps the inner wall of the second connecting hole 1337, which can feedback to the user that the first driving member 33 has approached the docking point between the first fastening member 31 and the second connecting component 133, and the first driving member 33 is driven to move toward the proximal end again, so that the elastic structure 333 is squeezed by the inner wall of the second connecting hole 1337, and the first driving member 33 is withdrawn from the docking point between the first fastening member 31 and the second connecting component 133, and the first fastening member 31 and the second connecting component 133 are released from the fixed connection, and the first fastening member 31 and the second connecting component 133 can be separated.

[0058] For example, Fig.10 As shown, the elastic structure 333 includes a connecting rod 3331 and an elastic portion 3332, one end of the connecting rod 3331 is connected to the outer wall of the first driving member 33, the other end of the connecting rod 3331 is connected to the elastic portion 3332, and the elastic portion 3332 is interference connected with the second connecting hole 1337. The elastic portion 3332 is elastic, and when the first driving member 33 moves toward the proximal end, the elastic portion 3332 is squeezed by the inner wall of the second connecting hole 1337, and the elastic portion 3332 is compressed in the radial direction, so that the first driving member 33 passes through the second connecting hole 1337. In other examples, the connecting rod 3331 can also be omitted, that is, the elastic portion 3332 is directly connected to the outer wall of the first driving member 33.

[0059] For example, Fig.11 As shown, the elastic structure 333 includes an elastic member 334 and an abutment portion 335, the elastic member 334 is penetrated through the first driving member 33, the abutment portion 335 is fixedly connected to the elastic member 334, and the abutment portion 335 is exposed on the outer wall of the first driving member 33. The elastic member 334 is elastic, and the first driving member 33 moves toward the proximal end. The abutment portion 335 is squeezed by the inner wall of the second connecting hole 1337, and the abutment portion 335 abuts against the elastic member 334, and the elastic member 334 is compressed in the radial direction so that the first driving member 33 passes through the second connecting hole 1337. In other examples, the elastic structure 333 includes an elastic member 334 and two abutment portions 335, the elastic member 334 penetrates the first driving member 33 in the radial direction of the first driving member 33, the two abutment portions 335 are respectively fixedly connected to the two ends of the elastic member 334, and the two abutment portions 335 are exposed on the outer wall of the first driving member 33.

[0060] In some embodiments, the conveying mechanism 30 further includes an outer sheath 35, and the blocking mechanism 10 is axially compressed in the outer sheath 35. The outer sheath 35 is a medium for the blocking mechanism 10 to enter the human blood vessel. The blocking component 11 of the blocking mechanism 10 is squeezed by the inner wall of the outer sheath 35, and the blocking component 11 is stretched straight and roughly linear. The blocking component 11 extends out of the outer sheath 35, and the blocking component 11 is not squeezed by the inner wall of the outer sheath 35, and the blocking component 11 can be compressed axially. The blocking component 11 can be self-expanded and stretched when extending from the outer sheath 35; or the blocking component 11 can be radially expanded after extending from the outer sheath 35 and under human control intervention.

[0061] The following will describe the use process and working principle of the medical device 100 according to the embodiment of the present application.

[0062] The first step, such as Figure 3 As shown, after the second connecting component 133 of the blocking mechanism 10 and the first fastening member 31 of the conveying mechanism 30 are fastened and connected, the first driving member 33 is inserted into the second connecting component 133 and the first fastening member 31. The second connecting component 133 and the first fastening member 31 are locked by the locking action of the first driving member 33. The first driving member 33 and the second driving member 1326 are threadedly connected, and the first fastening member 31, the first driving member 33 and the blocking mechanism 10 are assembled as a whole. The assembled whole is compressed in the outer sheath 35. Since the blocking component 11 is elastic and can be stretched in the axial and radial directions, when the blocking component 11 is compressed in the outer sheath 35, under the extrusion force of the inner wall of the outer sheath 35, the blocking component 11 can be axially extended, so that the blocking component 11 is stretched straight and roughly linear. The diameter of the straightened blocking component 11 is small and can be easily passed through the outer sheath 35.

[0063] Step 2: Figure 2 and Figure 4 As shown, the occluding assembly 11 reaches the vicinity of the cleft 203 of the target blood vessel, the outer sheath 35 passes through the cleft 203, and the occluding assembly 11 is released at the cleft 203, so that the distal occluding part 114 is released in the blood vessel false lumen 205, and then the entire device is appropriately withdrawn toward the proximal end, and the proximal occluding part 112 is released in the blood vessel true lumen 206. At this time, the occluding assembly 11 is inserted into the cleft 203, and the distal occluding part 114 and the proximal occluding part 112 are respectively located on both sides of the inner membrane 201. Then the first driving member 33 and the first buckling member 31 are driven to move relative to each other, so that the first driving member 33 moves toward the proximal end, the first driving member 33 drives the second driving member 1326 to move toward the proximal end, and the second driving member 1326 drives the locking member 1322 to move toward the proximal end, and the occluding assembly 11 is gradually compressed along the axial direction, so that the distal occluding part 114 and the proximal occluding part 112 clamp the inner membrane 201.

[0064] Step 3. Figure 5As shown, the first driving member 33 continues to move toward the proximal end, the second connecting portion 1324 passes through the first connecting hole 1332, the locking portion 1325 is squeezed by the inner wall of the first connecting hole 1332, the locking portion 1325 contracts radially, passes through the first connecting hole 1332, and expands radially in the locking cavity 1330. After the locking portion 1325 enters the locking cavity 1330, the inner wall of the first connecting hole 1332 prevents the locking portion 1325 from moving toward the distal end, and the locking portion 1325 is fixed in the locking cavity 1330, so that the first connecting component 132 is locked to the second connecting component 133, thereby realizing the locking of the distal blocking portion 114 and the proximal blocking portion 112. The proximal blocking portion 112 and the distal blocking portion 114 clamp the two sides of the inner membrane 201 near the rupture 203, thereby blocking the rupture 203.

[0065] Step 4. Figure 5 , Figure 7 and Figures 12 to 15 As shown, the blocking component 11 is released. For the convenience of explanation, the axial direction of the first driving member 33 is defined as the Z-axis direction, the radial direction of the first driving member 33 is defined as the Y-axis direction, and the direction perpendicular to the ZOY plane is defined as the X-axis direction. The X-axis direction, the Y-axis direction and the Z-axis direction are perpendicular to each other. The first driving member 33 rotates relative to the second driving member 1326 to release the first driving member 33 from the thread on the second driving member 1326. The first driving member 33 moves along the Z-axis direction (proximal direction) relative to the first fastening member 31 until the first driving member 33 withdraws from the docking point between the second connecting component 133 and the first fastening member 31, that is, the first driving member 33 withdraws from the first connecting groove 314 of the second through hole 313, thereby releasing the locking state of the second connecting component 133 and the first fastening member 31, that is, the first fastening member 31 can move relative to the second connecting component 133 in the Y-axis direction, so that it can be separated from the second connecting component 133. The following method can also be used to separate the first fastening member 31 from the second connecting component 133, such as Figures 13 to 15 As shown, the first fastening member 31 is rotated around the Z-axis direction, and the first fastening member 31 generates relative movement relative to the second connecting component 133 on the XOY plane, and the first fastening portion 315 can be withdrawn from the second connecting groove 1334, and the second fastening portion 1335 can be withdrawn from the first connecting groove 314. The first fastening member 31 moves along the Z-axis direction (proximal direction), the first fastening member 31 is away from the blocking component 11, and the first fastening member 31 is withdrawn from the human body. When releasing the blocking mechanism, it is only necessary to withdraw the first driving member 33 from the joint between the first fastening member 31 and the second connecting component 133, and the first fastening member 31 and the second connecting component 133 are unlocked, and the first fastening member 31 can be separated from the second connecting component 133, which is easy to operate.

[0066] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present invention can be combined with each other, and any combination of features in different embodiments is also within the protection scope of the present invention. In other words, the multiple embodiments described above can also be combined arbitrarily according to actual needs.

[0067] It should be noted that all the above drawings are exemplary illustrations of the present invention and do not represent the actual size of the product. Moreover, the size ratio relationship between the components in the drawings is not intended to limit the actual product of the present invention.

[0068] The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. The protection scope of the utility model is not limited thereto. Any technician familiar with the field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. In summary, the content of this specification should not be understood as a limitation of the utility model.

Claims

1. A medical device, characterized in that: The medical device comprises a blocking mechanism and a delivery mechanism; The blocking mechanism includes a blocking component and a locking component, the blocking component can be compressed and extended in the axial direction, the locking component includes a first connecting component and a second connecting component, the second connecting component is fixedly connected to the proximal end of the blocking component, the first connecting component is arranged inside the blocking component, the distal end of the first connecting component is fixedly connected to the distal end of the blocking component, and the proximal end of the first connecting component can be locked with the second connecting component to keep the blocking component in axial compression; The conveying mechanism includes a first fastening member and a first driving member, the first driving member is movably inserted into the first fastening member; the first fastening member and the second connecting component are detachably fastened and connected, and the first driving member and the first connecting component are detachably connected; the first driving member is used to drive the first connecting component to be locked to the second connecting component; the first driving member is also used to keep the first fastening member and the second connecting component in a fastened connection or separated.

2. The medical device according to claim 1, characterized in that The first fastening member is provided with a first connecting groove, and the first fastening member further comprises a first fastening portion located at the distal end of the first connecting groove; the second connecting component is provided with a second connecting groove, and the second connecting component further comprises a second fastening portion located at the proximal end of the second connecting groove; the first fastening member and the second connecting component have a fastened state and a separated state; In the buckled state, the first buckled portion is connected to the second connecting groove, and the second buckled portion is connected to the first connecting groove; In the separated state, the first buckling portion is withdrawn from the second connecting groove, and the second buckling portion is withdrawn from the first connecting groove.

3. The medical device according to claim 2, characterized in that The first buckling portion is provided with a first avoidance gap, and the first avoidance gap is connected to the first connecting groove; the second buckling portion is provided with a second avoidance gap, and the second avoidance gap is connected to the second connecting groove; the first avoidance gap is used to avoid the second connecting component, and the second avoidance gap is used to avoid the first buckling component.

4. The medical device according to claim 3, characterized in that The bottom surface of the first avoidance notch is positioned on the side groove surface of the second connecting groove, and the bottom surface of the second avoidance notch is positioned on the side groove surface of the first connecting groove.

5. The medical device according to claim 4, characterized in that The bottom surface of the first avoidance gap is a plane or an arc surface, and the side groove surface of the second connecting groove corresponds thereto; the bottom surface of the second avoidance gap is a plane or an arc surface, and the side groove surface of the first connecting groove corresponds thereto.

6. The medical device according to claim 1, characterized in that The first connecting component includes a locking piece, which can be elastically deformed. The second connecting component is provided with a locking cavity. The locking piece is locked to the locking cavity through elastic deformation, so that the first connecting component and the second connecting component are locked.

7. The medical device according to claim 6, characterized in that The second connecting component is also provided with a first connecting hole, the first connecting hole is communicated with the locking cavity, the first connecting hole is arranged at the distal end relative to the locking cavity, and the radial direction of the first connecting hole is smaller than the inner diameter of the locking cavity; the locking piece can be radially contracted and passed through the first connecting hole, and the locking piece can be radially expanded in the locking cavity so that the first connecting component is locked to the second connecting component.

8. The medical device according to claim 7, characterized in that The first connecting component also includes a second driving member, the second driving member is fixedly connected to the locking member, and the first driving member is connected to the locking member through the second driving member; the first driving member drives the second driving member to move, and the second driving member drives the locking member to move, so as to achieve the locking member being locked to the locking cavity.

9. The medical device according to claim 8, characterized in that The second connecting component is also provided with a second connecting hole, and the second connecting hole is communicated with the locking cavity; the outer wall of the first driving member is provided with an elastic structure that is locked or unlocked relative to the second connecting hole through elastic deformation.

10. The medical device according to claim 1, characterized in that The conveying mechanism also includes an outer sheath tube, and the blocking mechanism is axially compressed in the outer sheath tube.

11. The medical device according to claim 1, characterized in that The blocking component includes a proximal blocking part, a waist and a distal blocking part, the waist is connected between the proximal blocking part and the distal blocking part, and the radial dimensions of the proximal blocking part and the distal blocking part are greater than the radial dimension of the waist.

12. The medical device according to claim 11, characterized in that The outer circumferential walls and / or inner circumferential walls of the proximal blocking portion, the waist portion and the distal blocking portion are provided with a membrane structure, and the membrane structure is used to prevent blood from passing through.

Images