CN214511423U - Valve presss from both sides convenient to load and carries - Google Patents
Valve presss from both sides convenient to load and carries Download PDFInfo
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- CN214511423U CN214511423U CN202023069631.9U CN202023069631U CN214511423U CN 214511423 U CN214511423 U CN 214511423U CN 202023069631 U CN202023069631 U CN 202023069631U CN 214511423 U CN214511423 U CN 214511423U
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Abstract
The utility model relates to the field of medical equipment, in particular to a valve clamp convenient for loading and conveying, which comprises a telescopic sleeve, a linking piece, clamping arms and a linkage rod, wherein the clamping arms are connected with the linking piece, one end of the linkage rod is connected with the telescopic sleeve, the other end of the linkage rod is connected with one end of the clamping arms, the valve clamp has a first shape and a second shape, when the valve clamp is in the first shape, a minimum included angle is formed between the clamping arms, the linkage rod is attached to the clamping arms, and the telescopic sleeve is in a compressed shape; when the valve clip is changed from the first form to the second form, the telescopic sleeve is gradually extended to drive the included angle between the clipping arms to be gradually increased so as to facilitate the linkage rod to catch the autologous valve leaflets; after the valve clip finishes capturing the autologous valve leaflets, the telescopic sleeve is shortened to the compressed state again, and the valve clip is restored to the first state from the second state; simple structure, good stability and convenient bending and conveying, and the valve clip can be shortened to the shortest stroke when being loaded, thereby being convenient for dealing with the curvature of the blood vessel.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to a valve presss from both sides convenient to load and carries.
Background
The mitral valve has a complex anatomy, including the leaflets, annulus, chordae tendinae, and papillary muscles, which play important roles in maintaining the function of the right and left ventricles, respectively. Any disease that affects the structural integrity and proper functioning of the leaflets, annulus, chordae tendineae, papillary muscles and left ventricle may lead to severe mitral insufficiency (MR), which may cause left ventricular failure, pulmonary hypertension, atrial fibrillation, stroke and death. According to recent epidemiological survey data in western developed countries such as the united states, the leading type of valvular disease in the elderly population older than 65 years is mitral regurgitation. Currently, although there is no authoritative epidemiological survey data in China, the number of mitral regurgitation patients in China is indisputably huge as the population ages. Mitral insufficiency can be divided into degenerative MR and functional MR, the degenerative MR being caused by pathological changes in 1 or more of the leaflets, annulus, chordae tendineae, and papillary muscles; functional MR is usually left ventricular dysfunction, such as annular enlargement, but the mitral valve is usually normal.
At present, the treatment methods of MR mainly include drug therapy, surgery and interventional therapy. Drug therapy only improves the symptoms of the patient and does not prolong the survival time of the patient. Surgery, mainly valve repair or valve replacement, is recognized as the first treatment for mitral regurgitation and has been shown to alleviate symptoms and prolong the life of the patient. However, for many high-risk patients of advanced age with multiple system diseases, the surgical risk is high and the survival benefit is low, and according to the european data, the surgical success rate of such patients is only 50%, and the surgical success rate of patients with severe functional MR is as low as 16%. Thus, transcatheter interventional mitral valve repair and replacement theoretically could benefit high-risk patients who lose surgical opportunity. Interventional procedures are performed by loading a prosthetic implant extracorporeally onto a delivery system, delivering it along a vascular path or puncture the apex of the heart to the mitral annulus, and then releasing and securing it to replace, in whole or in part, the function of the native valve. Currently, intervention treatment of mitral valve has become one of the hot spots of research in related fields, and many products are under development. However, the development of a mitral valve intervention device faces a number of special difficulties due to the problems of the complexity of the mitral valve itself and the surrounding structures.
Patent CN103826548A provides a method of fixing tissue, the method comprising: implantable fixation devices are provided that include a pair of fixation elements, each fixation element having a first end, a free end opposite the first end, and an engagement surface between the first end and the free end for engaging tissue, the first ends being movably coupled together such that the fixation elements are movable between a closed position in which the engagement surfaces face each other and a first open position in which the engagement surfaces are positioned away from each other.
Patent CN201880066104.9 discloses a valvular clip device comprising a spacer member configured to be arranged between leaflets of a native heart valve located between a first and a second chamber of the heart. The prosthetic device further includes a plurality of anchor members coupled to the spacer member and configured to capture the leaflets between the respective anchor members and the spacer member such that the valve clip is retained between the leaflets. When the leaflet is captured between the anchor member and the spacer member, the spacer member is configured to provide a flow path through the prosthetic device between the first lumen and the second lumen such that blood can reflux from the second lumen to the first lumen through the spacer member; the frame structure in the patent technical scheme adopts the support of the pre-plastic metal material, although the frame structure can conform to the curvature of a blood vessel due to the characteristics of the material during loading and conveying, the frame structure can cause capture failure due to insufficient support of the stent when capturing valve leaflets, meanwhile, the stability of the structure is poor, and the problems of stress fatigue and the like can be caused after long-term use.
In summary, there are still many problems in loading and conveying and structural stability of the valve clip in the prior art, and it is desirable to provide a valve clip which has a simple structure and good stability and is convenient for bending and conveying.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a valve presss from both sides convenient to load transport, this valve presss from both sides possesses following advantage: simple structure, the stability can be good simultaneously its transfer of being convenient for again and bend and carry, and the valve presss from both sides when loading, can shorten to the shortest stroke, and the conveying system of being convenient for can deal with the curvature of blood vessel when transferring the bending, can strengthen the stability of structure again simultaneously, can not produce stress fatigue scheduling problem.
In order to solve the technical problem, the utility model discloses a following technical scheme can solve: a valve clamp convenient for loading and conveying comprises a telescopic sleeve, a jointing piece connected with one end of the telescopic sleeve, clamping arms and a linkage rod, wherein the clamping arms are connected with the jointing piece, one end of the linkage rod is connected with the telescopic sleeve, the other end of the linkage rod is connected with one end of each clamping arm, the valve clamp is provided with a first shape and a second shape, when the valve clamp is in the first shape, a minimum included angle is formed between the clamping arms, the linkage rod is attached to the clamping arms, and the telescopic sleeve is in a compressed shape; when the valve clip is changed from the first form to the second form, the telescopic sleeve is gradually extended to drive the included angle between the clipping arms to be gradually increased so that the linkage rod can catch the autologous valve leaflets; after the valve clip finishes capturing the autologous valve leaflets, the telescopic sleeve is shortened to the compressed state again, and the valve clip is restored to the first state from the second state.
The utility model discloses can also further realize through following technical scheme:
in one embodiment, the telescopic sleeve, the connecting piece, the clamping arm and the linkage rod are made of rigid materials, and the design has the advantages that: when the stroke of the telescopic sleeve changes, the structure of the whole valve clamp has good support performance, can not deform in the operation process, is beneficial to operation, and on the other hand, can ensure lasting clamping force and can not generate the problems of fatigue and the like.
In one embodiment, the retractable sleeve is composed of a plurality of sleeves, and the anti-falling structure is arranged between the adjacent sleeves.
In one embodiment, the length of the retractable sleeve is the length of the outermost sleeve when the retractable sleeve is in the compressed configuration.
In one embodiment, the telescoping sleeve is attached to the engagement member at one end regardless of whether the valve clip is in the first configuration or the second configuration or during transition between the first configuration and the second configuration.
In one embodiment, the innermost sleeve of the retractable sleeve is connected with the joint piece, the clamping arm comprises a first clamping arm and a second clamping arm, the linkage rod comprises a first linkage rod and a second linkage rod, the first clamping arm and the second clamping arm are respectively hinged with the joint piece and are arranged on the left side and the right side of the retractable sleeve, one end of the first linkage rod is hinged with the first clamping arm, the other end of the first linkage rod is hinged with the outermost sleeve of the retractable sleeve, one end of the second linkage rod is hinged with the second clamping arm, and the other end of the second linkage rod is hinged with the outermost sleeve of the retractable sleeve.
In one embodiment, the valve clip further comprises a self-locking structure, the self-locking structure comprises a limiting member arranged on the joint piece and a locking piece arranged on the outermost sleeve of the telescopic sleeve, and when the valve clip is in the first shape, the locking piece is matched with the limiting member to realize self-locking; the limiting component is of a self-expanding structure.
In one embodiment, the retractable sleeve comprises a first sleeve, a second sleeve and a third sleeve, the second sleeve being sleeved between the first sleeve and the third sleeve, the first sleeve being connected to the joint, the third sleeve being connected to the linkage rod.
In a preferred embodiment, the length of the second sleeve is less than the length of the third sleeve, and the length of the first sleeve is less than the length of the third sleeve; the advantages of such a design are: when the telescopic sleeve is shortened to the shortest stroke, the first sleeve and the second sleeve do not exceed the third sleeve, so that the length of the telescopic sleeve in the body is increased, and scraping and damage to heart valves and intracardiac tissues are avoided.
In one embodiment, the valve clip further comprises a locking device, the locking device comprises a self-locking rod and a locking head which are connected with the connecting piece, the clamping arm comprises a long arm and a short arm, one end of the short arm is provided with a locking part, and when the locking device is operated to move axially to enable the opening angle of the long arm of the first clamping arm and the opening angle of the long arm of the second clamping arm to be increased to be in an opening state, the locking part on the first clamping arm and the locking part on the second clamping arm are in a staggered fit state; and operating the locking device to move axially to enable the opening angle of the long arm of the first clamping arm and the opening angle of the long arm of the second clamping arm to be reduced and to be in a closed state, and moving the self-locking rod to enable the locking head to be matched with the locking part and locked.
In one embodiment, the locking rod has a length less than a length of the third sleeve; avoiding the valve clip from increasing in length when implanted in the heart and thereby scraping off intracardiac tissue.
In one embodiment, the short arm is in an arc shape or an "L" shape, and when the opening angle of the first clamping arm and the second clamping arm is increased, the short arm on the first clamping arm and the short arm on the second clamping arm are in staggered fit.
In one embodiment, the connecting block is axially provided with a through hole and an installation groove, the installation groove is arranged on the far-end side of the through hole, an internal thread is arranged in the through hole, and the far-end side of the locking rod is provided with an external thread matched and screwed with the internal thread.
In one embodiment, the locking head portion is located in the mounting groove during loading and transportation, the maximum diameter of the locking head portion is larger than the diameter of the through hole, the diameter of the mounting groove is larger than the diameter of the through hole, and the locking head portion is limited by the through hole to move towards the proximal end.
In one embodiment, the valve clip further comprises a valve clip delivery system, the valve clip delivery system comprises a control handle, a first delivery pipe, a middle control and a second delivery pipe which are connected with the control handle, the self-locking rod and the outermost sleeve of the telescopic sleeve are respectively provided with a detachable connecting mechanism, the distal end part of the first delivery pipe and the distal end part of the second delivery pipe are respectively provided with a detachable connecting mechanism which is matched with the detachable connecting mechanisms, when the valve clip is preassembled, the detachable connecting mechanism on the self-locking rod is connected with the detachable connecting mechanism on the first delivery pipe through the middle control, the valve clip is a first detachable part, the detachable connecting mechanism on the outermost sleeve of the telescopic sleeve is connected with the detachable connecting mechanism on the second delivery pipe through the middle control, the second detachable part is a second detachable part, and when the middle control is moved away from the first position, When the second is dismantled, first conveyer pipe with from the locking lever, the second conveyer pipe with but telescopic sleeve's outmost sleeve pipe release separation.
In one embodiment, when the first disassembling part and the second disassembling part are relatively displaced, the relative position of the middle control and the first conveying pipe is always kept unchanged; the design has the advantages that: when first dismantlement portion with when relative displacement takes place for the second dismantlement portion, steerable the switching of valve clamp, and well controlling part with the relative position of first conveyer pipe remains the in-process that can guarantee the valve clamp at the switching throughout, first dismantlement portion can not dismantled in advance, well controlling part has filled simultaneously first conveyer pipe with the inner tube, the second conveyer pipe with the space between the outer connecting pipe, make its whole device when the operation, the structure is more stable.
Compared with the prior art, the utility model has the advantages of:
1. be different from prior art, the utility model discloses a telescopic tube structure, when loading, shorten telescopic tube to the shortest stroke, be favorable to the valve to press from both sides the various curve degree of adjusting in the corresponding blood vessel when loading the transport, and can not scrape and increase the vascular wall, cause the damage, when needs catch the valve leaf, be convenient for catch the valve leaf with telescopic tube by tensile to the target stroke, and simultaneously, telescopic tube provides sufficient holding power for the valve presss from both sides, when the valve leaf is located the gangbar, telescopic tube is compressed to the shortest stroke once more, make the valve leaf be pressed from both sides and close between gangbar and telescopic tube, the target position is implanted to the valve presss from both sides, telescopic tube layer upon layer superimposed structure makes the valve press from both sides have more leak protection effect;
2. different from the prior art, the utility model adopts three layers of sleeves to be overlapped, which not only approaches the optimal effective length (the optimal effective distance is the vertical length from the connecting piece to one end of the clamping arm) to ensure that the diameter of the telescopic sleeve is not too thick, which affects the access and causes unnecessary damage to the blood vessel;
3. different from the prior art, when the opening angle of the first clamping arm and the second clamping arm is increased, the locking parts on the first clamping arm and the second clamping arm are buckled in a staggered mode, the size of the opening angle between the clamping arms is not interfered/influenced, the valve leaflet can be captured and clamped, when the valve clamp needs to be locked, one end of the locking rod moves towards the far end along the axial direction of the connecting piece until one end of the locking rod is matched with the locking area in a locking mode, and then locking is completed; by utilizing the lever principle, moment balance is generated between one end of the locking rod and the locking part, the opening angle of the first clamping arm and the opening angle of the second clamping arm are controlled not to be increased any more, the locking effect is achieved, meanwhile, the locking structure is mechanical locking, the structure is simple, the operation is simple and convenient, no fatigue risk exists, and the clamping effect can be ensured for a long time;
4. be different from prior art, in the utility model discloses no matter the valve presss from both sides to first form or second form or be in two kinds of form conversion processes, scalable sleeve pipe one end all the time with the link joint piece is connected, the aim at of designing like this: when the opening angle between the clamping arms of the valve clamp is gradually increased, the telescopic sleeve improves the structural stability of the valve clamp, and the valve clamp is prevented from shaking left and right in the heart during operation.
Drawings
Fig. 1a to 1d are schematic views of the overall structure of a valve clip convenient for loading and delivery according to the present invention.
Fig. 2a to 2f are schematic structural views of the retractable sleeve of the present invention.
Fig. 3a to 3c are schematic structural views of the locking device of the present invention.
Fig. 4a to 4c are schematic structural views of the clamping arm of the present invention
Fig. 5a to 5d are schematic structural views of the locking part and schematic diagrams of the locking clamping arm of the lock head part.
Fig. 6a to 6f are schematic structural views of the linking member and the self-locking structure of the present invention.
Fig. 7a to 7c are schematic structural views of the detachable portion and the connecting portion of the present invention.
Fig. 8a to 8g are schematic views illustrating the process of the delivery catheter of the present invention entering the heart.
Fig. 9 a-9 c are schematic views illustrating the process of opening the valve clip in the left atrium.
Fig. 10 a-10 h are schematic views illustrating the process of moving the valve clip to the optimal anchoring position according to the present invention.
The names of the parts indicated by the numbers in the drawings are as follows: 1-clamping arm, 11-first clamping arm, 12-second clamping arm, 111-short arm, 112-long arm, 1111-first locking part, 1112-arc segment, 1211-second locking part, 2-linkage rod, 21-first linkage rod, 22-second linkage rod, 3-linkage piece, 31-linkage block, 311-through hole, 312-mounting groove, 32-linkage lug, 4-locking device, 41-self-locking rod, 42-locking head, 43-internal detaching part, 5-telescopic sleeve, 51-first sleeve, 511-first limiting part, 52-second sleeve, 521-second limiting part, 522-third limiting part, 53-third sleeve, 54-external detaching part, 55-anti-disengaging structure, 6-conveying conduit, 61-first conveying pipe, 62-second conveying pipe, 63-middle control, 611-first releasing part, 621-second releasing part, 64-first detaching part, 65-second detaching part, 7-self-locking structure, 71-limiting member and 72-locking piece.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The near end of the utility model is the end close to the operator, and the far end is the end far away from the operator.
The specific embodiment is as follows:
the present invention will be described in further detail with reference to the accompanying drawings and examples.
The near end of the utility model is the end close to the operator, and the far end is the end far away from the operator.
The first embodiment is as follows:
when the valve clip is used for treating mitral valve diseases, as shown in figures 1a to 1d, the valve clip convenient for loading and conveying comprises an extensible sleeve 5, a connecting piece 3 connected with one end of the extensible sleeve 5, a clipping arm 1 and a linkage rod 2, the clamping arm 1 is connected with the connecting piece 3, one end of the linkage rod 2 is connected with the telescopic sleeve 5, the other end of the linkage rod 2 is connected with one end of the clamping arm 1, the valve clamp has a first shape and a second shape, when the valve clip is in the first shape (namely the shape when the valve clip is loaded), the clamping arms 1 form a minimum included angle, the linkage rod 2 is attached to the clamping arms 1, the telescopic sleeve 5 is in a compressed shape, therefore, the valve clamp is favorable for coping with various bending degrees in the blood vessel during loading and conveying, and cannot be scraped to the blood vessel wall to cause damage; when the valve presss from both sides when changing into the second form by first form, telescopic tube 5 extends gradually, drives contained angle crescent so that between the clamping arm 1 the autologous leaflet is grabbed to gangbar 2, and simultaneously, telescopic tube 5 provides sufficient holding power for the valve presss from both sides, telescopic tube 5, joint piece 3, clamping arm 1, gangbar 2 all adopt rigid material to make, and the benefit of design like this lies in: when the stroke of the telescopic sleeve 5 is changed, the structure of the whole valve clip has good support performance, can not deform in the operation process, is beneficial to operation, and can ensure lasting clamping force and avoid the problems of fatigue and the like; after the valve clip finishes capturing the autologous valve leaflets, the telescopic sleeve 5 is shortened to the compressed state again, and the valve clip is restored to the first state from the second state; the valve clip has better leakage-proof effect due to the structure that the telescopic sleeves 5 are overlapped layer by layer.
The components and connection mode of the components of the valve clip capable of shortening the loading stroke according to the present invention will be described in detail with reference to the accompanying drawings;
in this embodiment, the retractable sleeve 5 is composed of a plurality of sleeves, and an anti-slip structure 55 is disposed between adjacent sleeves, as shown in fig. 2 a.
In this embodiment, when the retractable sleeve 5 is in the compressed state, the length of the retractable sleeve 5 is the length of the outermost sleeve (i.e. the third sleeve 53), as shown in fig. 2 a.
In this embodiment, the end of the retractable sleeve 5 is always connected to the connector 3 whether the valve clip is in the first configuration or the second configuration or during the transition between the first configuration and the second configuration.
In this embodiment, the innermost sleeve (i.e. the first sleeve 51) of the retractable sleeve 5 is connected to the joining member 3, the clamping arm 1 includes a first clamping arm 11 and a second clamping arm 12, the linkage rod 2 includes a first linkage rod 21 and a second linkage rod 22, the first clamping arm 11 and the second clamping arm 12 are respectively hinged to the joining member 3 and are disposed at the left and right sides of the retractable sleeve 5, one end of the first linkage rod 21 is hinged to the first clamping arm 11, the other end of the first linkage rod 21 is hinged to the outermost sleeve of the retractable sleeve 5, one end of the second linkage rod 22 is hinged to the second clamping arm 12, and the other end of the second linkage rod 22 is hinged to the outermost sleeve of the retractable sleeve 5.
In this embodiment, the retractable sleeve 5 includes a first sleeve 51, a second sleeve 52 and a third sleeve 53, the second sleeve 52 is sleeved between the first sleeve 51 and the third sleeve 53, the first sleeve 51 is connected to the linking member 3, the third sleeve 53 is connected to the linkage rod 2 (as shown in fig. 2a to 2 c), a first radially outward limiting member 511 is disposed at a proximal end of the first sleeve 51, a second radially outward limiting member 521 is disposed at a proximal end of the second sleeve 52, a third radially inward limiting member 522 is further disposed at a distal end of the second sleeve 52, and a fourth radially inward limiting member 532 is disposed at a proximal end of the third sleeve 53, as shown in fig. 2d to 2 f.
In this embodiment, the shortest stroke of the retractable sleeve 5, i.e. the length of the third sleeve 53, the length of the second sleeve 52 is smaller than the length of the third sleeve 53, wherein the length of the first sleeve 51 is smaller than the length of the third sleeve 53, as shown in fig. 2 a; the advantages of such a design are: when the retractable sleeve 5 is shortened to the shortest stroke, the first sleeve 51 and the second sleeve 52 do not exceed the third sleeve 53, thereby increasing the length of the retractable sleeve 5 in the body and avoiding scraping and damaging the heart valves and the tissues in the heart.
In this embodiment, the valve clip further includes a locking device 4, as shown in fig. 3a to 3c, the locking device 4 includes a self-locking lever 41 and a locking head 42 connected to the connecting member 3, the clipping arm 1 includes a long arm and a short arm, as shown in fig. 4a and 4b, one end of the short arm 111 is provided with a locking portion 1111, when the locking device 4 is operated to move axially to make the opening angle of the long arm 112 of the first clipping arm 11 and the long arm 122 of the second clipping arm 12 become larger to be in an open state, the locking portion on the first clipping arm 11 and the locking portion on the second clipping arm 12 (i.e. the first locking portion 1111 and the second locking portion 1211) are in a misaligned state, as shown in fig. 5a and 5 b; when the locking device 4 is operated to move axially to make the opening angle of the long arm 112 of the first clamping arm 11 and the long arm 122 of the second clamping arm 12 become smaller and the locking state is formed, the self-locking lever 41 is moved to make the locking head 42 and the locking portions (i.e. the first locking portion 1111 and the second locking portion 1211) realize the engagement and locking, as shown in fig. 5c and 5 d.
In this embodiment, the length of the locking device 4 is smaller than the length of the third sleeve 53; avoiding the valve clip from increasing in length when implanted in the heart and thereby scraping off intracardiac tissue.
In this embodiment, the short arm 111 is in an arc shape or an "L" shape, and when the opening angle of the first clamping arm 11 and the second clamping arm 12 is increased, the first locking portion 1111 and the second locking portion 1211 are engaged with each other in a staggered manner, as shown in fig. 5 b.
In another embodiment, when the valve clip captures the valve leaflet, the telescopic sleeve 5 is stretched to a target stroke, enters from the left atrium to the lower part of the left ventricle and captures the valve leaflet, and at this time, there may be an angular adjustment problem, the telescopic sleeve 5 can be stretched to a maximum stroke, and the first clamping arm 11 and the second clamping arm 12, the first linkage rod 21 and the second linkage rod 22 cooperate with the telescopic sleeve 5 to form a diamond structure, as shown in fig. 1d, so as to facilitate the valve prosthesis to be drawn out from the complex environment below the mitral valve, and simultaneously, the chordae tendineae or the valve leaflet can not be hooked, and the injury to the heart inner tissue can be avoided; because the telescopic sleeve 5, the connecting piece 3, the clamping arm 1 and the linkage rod 2 are all made of rigid materials, the problems of deformation and the like caused by insufficient supporting strength can be avoided when the stroke of the telescopic sleeve 5 is changed, the operation is more facilitated, and on the other hand, the durable clamping force can be ensured, and the problems of fatigue and the like can be avoided.
In this embodiment, as shown in fig. 6a to 6b, a through hole 311 and an installation groove 312 are axially arranged on the connecting block 31, the installation groove 312 is arranged on a distal end side of the through hole 311, an internal thread is arranged in the through hole 311, an external thread which is screwed with the internal thread is arranged on a distal end side of the locking rod 43, when loading and conveying, the locking head 41 is located in the installation groove 312, a maximum diameter of the locking head 41 is larger than a diameter of the through hole 311, a diameter of the installation groove 312 is larger than the diameter of the through hole 311, and the locking head 41 is restricted by the through hole 311 to move towards a proximal end.
In this embodiment, the valve clip further includes a self-locking structure 7, the self-locking structure 7 includes a position-limiting member 71 disposed on the linking member 3 and a locking member 72 disposed on the outermost sleeve of the retractable sleeve 5, as shown in fig. 6c to 6f, when the valve clip is in the first configuration, the locking member 72 cooperates with the position-limiting member 71 to achieve self-locking.
In this embodiment, the limiting member 71 is a self-expanding structure, as shown in fig. 6d to 6f, the limiting member 71 deforms along with the movement of the locking member 72 toward the distal end, the limiting member 71 is a diamond shape, a triangle shape or other shapes, the locking member 72 is a diamond shape, a triangle shape or other shapes, and the limiting member 71 and the locking member 72 are in shape fit to realize locking.
In this embodiment, the valve clip further comprises a valve clip delivery system, the valve clip delivery system comprises a control handle (not shown), a first delivery pipe 61, a middle control 63 and a second delivery pipe 62 connected to the control handle (not shown), the self-locking lever 41 and the outermost sleeve (i.e. the third sleeve 53) of the retractable sleeve 5 are respectively provided with a detachable connection mechanism (i.e. the inner detachable portion 43 and the outer detachable portion 54), the distal end portion of the first delivery pipe 61 and the distal end portion of the second delivery pipe 62 are respectively provided with a releasable connection mechanism (i.e. the first releasable portion 611 and the second releasable portion 621) matched with the detachable connection mechanism, when pre-assembled, the inner detachable portion 43 is connected with the first releasable portion 611 through the middle control 63 to form a first detachable portion 64, the outer detachable portion 54 of the retractable sleeve 5 is connected with the second releasable portion 621 through the middle control 63, as a second detaching part 65, when the middle control 63 moves away from the first detaching part 64 and the second detaching part 65, the first delivery pipe 61 is disengaged from the self-locking lever 41, and the second delivery pipe 62 is disengaged from the outermost sleeve (the third sleeve 53) of the retractable sleeve 5, as shown in fig. 7a to 7 c.
The utility model discloses a theory of operation does:
1. the valve clip delivery catheter 6 is operated from the inferior vena cava into the heart, and then the delivery catheter 6 is operated such that the valve clip passes through the interatrial septum, as shown in figures 8 a-8 e; continuing to manipulate the delivery catheter 6 to bend such that the valve clip is facing the mitral valve, as shown in figures 8f and 8 g;
2. operating the control handle to withdraw the outer sheath to expose the valve clip in the left atrium, and operating the control handle to gradually increase the stroke of the telescopic tube 5 to the target stroke, as shown in fig. 9a to 9 c;
3. operating the control handle to enable the valve clip to penetrate through the mitral valve, as shown in fig. 10a, when the valve clip is anchored with the autologous valve leaflets, the autologous valve leaflets are positioned on the linkage rod 2, judging whether the valve clip is positioned at the optimal anchoring position through images, and if the valve clip is positioned at the optimal anchoring position, directly performing the operation according to the step 5; if the position is not the optimal position, the operation is carried out according to the step 4;
4. the control handle is operated to stretch the telescopic sleeve 5 to the maximum stroke, the clamping arm 1 and the linkage rod 2 form an obtuse angle to conform to a physiological structure and form a diamond structure by matching with the telescopic sleeve 5, so that the valve clamp can be conveniently pulled out from a complex environment below a mitral valve, and simultaneously, the valve clamp cannot hook chordae tendinae or valve leaflets, and the injury to endocardial tissue is avoided; because the telescopic sleeve 5, the connecting piece 3, the clamping arm 1 and the linkage rod 2 are all made of rigid materials, the problems of deformation and the like caused by insufficient supporting strength when the stroke of the telescopic sleeve 5 is changed are solved, the operation is more facilitated, the valve clamp is pulled to the left atrium, and the control handle is operated to rotate so as to enable the valve clamp to reach the optimal anchoring position, as shown in fig. 10 b-10 h;
5. the control handle is operated to shorten the telescopic sleeve 5 to the shortest stroke again until the linkage rod 2 is positioned between the clamping arm 1 and the telescopic sleeve 5 and tightly attached to the clamping arm 1, and the autologous valve leaflets are clamped between the telescopic sleeve 5 and the linkage rod 2;
6. when the locking head 42 enters the locking area, the locking head 42 and the locking parts (the first locking part 1111 and the second locking part 1211) complete the locking cooperation to achieve the valve clip locking purpose, as shown in fig. 5 d;
7. when the middle control 63 is operated to move proximally, the first detachable portion 64 and the second detachable portion 65 are sequentially and synchronously separated, as shown in fig. 7 b.
The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.
Claims (10)
1. A valve clip for facilitating loading delivery, comprising: the valve clamp comprises a telescopic sleeve, a connecting piece connected with one end of the telescopic sleeve, clamping arms and a linkage rod, wherein the clamping arms are connected with the connecting piece, one end of the linkage rod is connected with the telescopic sleeve, the other end of the linkage rod is connected with one end of each clamping arm, the valve clamp is in a first shape and a second shape, when the valve clamp is in the first shape, a minimum included angle is formed between the clamping arms, the linkage rod is attached to the clamping arms, and the telescopic sleeve is in a compressed shape; when the valve clip is changed from the first form to the second form, the telescopic sleeve is gradually extended to drive the included angle between the clipping arms to be gradually increased so that the linkage rod can catch the autologous valve leaflets; after the valve clip finishes capturing the autologous valve leaflets, the telescopic sleeve is shortened to the compressed state again, and the valve clip is restored to the first state from the second state.
2. The valve clip of claim 1, wherein: the telescopic sleeve is composed of a plurality of sleeves, and an anti-falling structure is arranged between every two adjacent sleeves.
3. The valve clip of claim 1, wherein: when the retractable sleeve is in a compressed state, the length of the retractable sleeve is the length of the outermost sleeve.
4. The valve clip of claim 1, wherein: whether the valve clip is in the first form or the second form or in the conversion process of the two forms, one end of the telescopic sleeve is always connected with the connecting piece.
5. The valve clip of claim 2, wherein: scalable sheathed tube innermost sleeve pipe with the linking piece is connected, the clamping arm includes first clamping arm and second clamping arm, the gangbar includes first gangbar and second gangbar, first clamping arm and second clamping arm respectively with the linking piece is articulated and is set up scalable sheathed tube the left and right sides, first gangbar one end with first clamping arm is articulated first gangbar other end with scalable sheathed tube outermost sleeve pipe is articulated, second gangbar one end with second clamping arm is articulated second gangbar other end with scalable sheathed tube outermost sleeve pipe is articulated.
6. The valve clip of claim 1, wherein: the valve presss from both sides still includes the auto-lock structure, the auto-lock structure including set up the stop component on the link piece and set up the locking piece on the outmost sleeve pipe of telescopic tube, when the valve presss from both sides and is in first form, the locking piece with the stop component cooperation realizes the auto-lock.
7. The valve clip of claim 5, wherein: the valve clip also comprises a locking device, the locking device comprises a self-locking rod and a locking head which are connected with the connecting piece, the clamping arm comprises a long arm and a short arm, one end of the short arm is provided with a locking part, and when the locking device is operated to move axially to enable the opening angles of the long arm of the first clamping arm and the long arm of the second clamping arm to be enlarged to be in an opening state, the locking part on the first clamping arm and the locking part on the second clamping arm are in a staggered fit state; and operating the locking device to move axially to enable the opening angle of the long arm of the first clamping arm and the opening angle of the long arm of the second clamping arm to be reduced and to be in a closed state, and moving the self-locking rod to enable the locking head to be matched with the locking part and locked.
8. The valve clip of claim 7, wherein: the short arm is arc-shaped or L-shaped, and when the opening angle of the first clamping arm and the opening angle of the second clamping arm are increased, the short arm on the first clamping arm is in staggered fit with the short arm on the second clamping arm.
9. The valve clip of claim 7, wherein: the valve clip also comprises a valve clip conveying system, the valve clip conveying system comprises a control handle, a first conveying pipe, a middle control and a second conveying pipe which are connected with the control handle, the self-locking rod and the outermost sleeve of the telescopic sleeve are respectively provided with a detachable connecting mechanism, the distal end part of the first conveying pipe and the distal end part of the second conveying pipe are respectively provided with a detachable connecting mechanism which is matched with the detachable connecting mechanisms, when in preassembly, the detachable connecting mechanism on the self-locking rod is connected with the detachable connecting mechanism on the first conveying pipe through the middle control and is a first detachable part, the detachable connecting mechanism on the outermost sleeve of the telescopic sleeve is connected with the detachable connecting mechanism on the second conveying pipe through the middle control and is a second detachable part, when the middle control is moved away from the first detachable part and the second detachable part, the first delivery pipe and the self-locking rod, the second delivery pipe and the outermost sleeve of the telescopic sleeve are separated.
10. The valve clip of claim 9, wherein: when the first disassembling part and the second disassembling part are relatively displaced, the relative position of the middle control and the first conveying pipe is always kept unchanged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023069631.9U CN214511423U (en) | 2020-12-18 | 2020-12-18 | Valve presss from both sides convenient to load and carries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023069631.9U CN214511423U (en) | 2020-12-18 | 2020-12-18 | Valve presss from both sides convenient to load and carries |
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| Publication Number | Publication Date |
|---|---|
| CN214511423U true CN214511423U (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023069631.9U Active CN214511423U (en) | 2020-12-18 | 2020-12-18 | Valve presss from both sides convenient to load and carries |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127561A1 (en) * | 2020-12-18 | 2022-06-23 | 宁波健世生物科技有限公司 | Mitral valve clip having locking mechanism |
| WO2022127562A1 (en) * | 2020-12-18 | 2022-06-23 | 宁波健世生物科技有限公司 | Integrally detachable valve clip and delivery system therefor |
| CN115245407A (en) * | 2021-11-10 | 2022-10-28 | 科凯(南通)生命科学有限公司 | Trans-femoral valve repair transporter |
-
2020
- 2020-12-18 CN CN202023069631.9U patent/CN214511423U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022127561A1 (en) * | 2020-12-18 | 2022-06-23 | 宁波健世生物科技有限公司 | Mitral valve clip having locking mechanism |
| WO2022127562A1 (en) * | 2020-12-18 | 2022-06-23 | 宁波健世生物科技有限公司 | Integrally detachable valve clip and delivery system therefor |
| CN115245407A (en) * | 2021-11-10 | 2022-10-28 | 科凯(南通)生命科学有限公司 | Trans-femoral valve repair transporter |
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