CN214967150U

CN214967150U - Implant instrument conveying system with centering adjusting device

Info

Publication number: CN214967150U
Application number: CN202023323169.0U
Authority: CN
Inventors: 郑玲和; 陈志�; 范维云
Original assignee: Jenscare Scientific Co Ltd
Current assignee: Jenscare Scientific Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-12-03
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses an implanting apparatus conveying system with a centering adjusting device, which comprises an implanting apparatus, a control handle, an inner tube, an inner core tube, a fixed tube, an outer sheath, an adjusting mechanism and a control releasing device, wherein the adjusting mechanism is connected with the inner core tube, the near end of the implanting apparatus is connected with the far end of the adjusting mechanism, the control releasing device limits the radial expansion of the far end part of the implanting apparatus, the centering adjusting device is arranged between the fixed tube and the outer sheath, the centering adjusting device comprises a first supporting section, a middle supporting section and a second supporting section, one end of the first supporting section is connected with the fixed tube, the other end of the second supporting section is arranged to be in axial sliding connection, the centering adjusting device is limited between the fixed tube and the outer sheath during preassembling, when the outer sheath moves towards the near end by operating the control handle, the centering adjusting device restores to a preset shape, the middle supporting section is tightly attached to the vessel wall so as to drive the inner core tube and the implanting apparatus to realize radial position adjustment, until the central axis of the implantation instrument is perpendicular to the self-valve annulus.

Description

Implant instrument conveying system with centering adjusting device

Technical Field

The utility model belongs to the field of medical equipment, concretely relates to take centering adjusting device's implantation apparatus conveying system.

Background

With the continuous improvement of the living standard of human beings, the patients with aortic valve diseases are increased continuously, the aortic valve diseases refer to primary or secondary aortic insufficiency or stenosis of a valve orifice and are mainly accompanied by diseases such as ascending aorta dilatation, at present, the treatment is mainly carried out by means of surgical operations, but the death rate of the operations is high, extracorporeal circulation is required, the wound area is large, and the physical conditions of some elderly patients cannot reach the expected level.

Researches show that the valve stent system and the operation technology are improved to inhibit complications such as aortic perforation, paravalvular leakage, thrombus, cerebral apoplexy and the like, and the valve stent system and the operation technology have important significance. The existing stent system treats aortic stenosis mainly through a balloon-expanded valve stent system and a self-expanding valve stent system as representatives, the survival rate of patients is improved through technical scheme reformation, the trans-valvular pressure difference after valve release is small, the incidence rate of conduction block is low, but the effect is not obvious in long term, the coaxiality is poor, the expansion is poor, the positioning is difficult and the slippage is easy to occur during the release, in recent years, some scholars at home and abroad develop the basic and clinical research of percutaneous aortic valve replacement and make some breakthrough progress, an effective treatment method is provided for high-risk senile aortic valve degenerative patients needing surgical valve replacement, but the problem that leaflets which are shaken off due to the contact of the stent and calcified leaflets and the aortic lumen wall can not be prevented from preventing or increasing the initiative of the patients is solved

Impurities such as atheromatous plaque and the like enter vessels such as carotid artery and the like, thereby causing cerebral apoplexy.

Patent cn201110092241.x provides a heart valve delivery system in which a prosthetic valve is mounted on a valve catheter inside a delivery sleeve. The step balloon extends from the delivery cannula and provides a tapered surface for convenient advancement through a body vessel. The stage balloon also facilitates passage through the leaflets of the native valve. After the prosthetic valve is positioned within the native valve, the delivery sleeve is retracted to expose the prosthetic valve. In one embodiment, the delivery sleeve is retracted by utilizing a lead screw that effects relative movement between the valve catheter and the delivery sleeve. The prosthetic valve is preferably self-expanding. If desired, the stage balloon can be expanded to securely seat the prosthetic valve at the native valve site. The prosthetic valve is preferably connected to the valve catheter by a plurality of flexible extension arms that enable the prosthetic valve to be collapsed after initial deployment of the prosthetic valve so that the prosthetic valve can be repositioned if desired; however, the technical scheme cannot adjust the circumferential position, reduces the positioning accuracy, and ensures that the valve cannot adjust the positioning position during positioning, so that the fault tolerance rate is low, and the risk coefficient of the operation is improved.

Patent CN103349577A provides a take percutaneous aorta stent system of distal end protection, protector in this system installs the distal end at the support, successively release respectively after making thrombus protector and support reach the target site through control handle, the protector that releases earlier than the support is after showing original inflation form, can effectively avoid fleeing into vessels such as carotid because of impurity such as leaflet tissue or atheromatous plaque that follow-up operation clashed off, but become cylindrical inflation state support at the vascular wall after the distal end release of this protector, the lower tip of its near-end divides into the scarf, can not play centering effect to support release process.

Patent CN104487017A provides a device for filtering emboli during percutaneous aortic valve replacement and repair procedures using a filtering system coupled to the distal end of a sheath, the sheath having proximal and distal ends and a lumen therebetween, the distal end being introducible into the aortic arch via the peripheral artery and the ascending aorta, the proximal end being positionable outside the body, the lumen allowing percutaneous aortic replacement and repair, a filter having a frame with an inlet and an outlet and an emboli filtering mesh attached to the frame, the inlet spanning the aortic arch sufficiently in the region between the aortic valve and the aorta, the outlet being coupled to the distal end of the sheath without leaving emboli that can pass through any gaps and not obstruct the lumen at the distal end of the sheath, but its additional equipment could scratch the filter, so potentially causing trauma to the aortic wall, and even possible equipment entanglement and interaction problems.

Therefore, how to realize the accurate location of the implantation instrument and simultaneously avoid the problem that the operation risk is reduced by the fact that impurities such as fallen plaques and thrombi enter vessels such as carotid artery and the like due to subsequent operation becomes the urgent need to be solved at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming prior art's not enough, provide a take centering adjusting device's implantation apparatus conveying system to the patient that the aorta is narrow and need intervene treatment, solved because of body and aortic valve anchor ring lead to implanting the not accurate problem of apparatus location for non-perpendicular angle to avoided because follow-up operation leads to impurity such as the plaque that drops and thrombus to get into vessels such as carotid, reduced the operation risk.

The utility model aims at realizing through the following scheme:

an implanting instrument conveying system with a centering adjusting device comprises an implanting instrument, a control handle, an inner tube, an inner core tube, a fixing tube, an outer sheath, an adjusting mechanism and a control releasing device, wherein the adjusting mechanism is connected with the inner core tube, the proximal end of the implanting instrument is matched and connected with the distal end of the adjusting mechanism, the control releasing device limits the radial expansion of the distal end part of the implanting instrument, a centering adjusting device is arranged between the fixing tube and the outer sheath and comprises a first supporting section, a middle supporting section and a second supporting section, one end of the first supporting section is connected with the fixing tube, the centering adjusting device is of a self-expanding type net structure, when the centering adjusting device is preassembled, the centering adjusting device is limited between the fixing tube and the outer sheath, and when the control handle is operated to enable the outer sheath to move towards the proximal end, the centering adjusting device restores to a preset shape, the middle supporting section is tightly attached to the vessel wall so as to drive the inner core tube and the implantation instrument to realize radial position adjustment.

The purpose of the utility model can be further realized by the following technical scheme:

in one embodiment, the proximal end of the adjustment mechanism is provided with a recess, the distal end of the centering adjustment device is constrained within the recess when preloaded, and the distal end of the centering adjustment device moves proximally out of the recess and returns to a preset shape when the control handle is operated to move the outer sheath proximally.

In one embodiment, the groove is trapezoidal in cross section in the axial center direction of the inner tube.

In one embodiment, the centering adjustment device is a self-expanding woven mesh structure, and the skeleton of the centering adjustment device is made of shape memory alloy or elastic wires.

In one embodiment, the second support section includes a support member and a connection ring, one end of the support member is fixedly connected to the centering adjustment device, the other end of the support member is connected to the connection ring, and the connection ring is sleeved on the inner core tube.

In one embodiment, the centering adjustment device is ellipsoidal when released, and the leg

The supporting members are symmetrically distributed around the axial center of the inner core tube to form conical tips, an angle a is formed between each supporting member and the axial center of the inner core tube, and the range of the angle a is 0-90 degrees.

In one embodiment, the junction of the first support section and the intermediate support section has a radiused buffer section and the junction of the second support section and the intermediate support section has a radiused buffer section to reduce resistance during distal advancement or proximal retraction of the outer sheath.

In one embodiment, the number of the support members is four.

In one embodiment, the distal end of the centering adjustment device is provided with a visualization marker or other visualization means for displaying the position and orientation of the centering adjustment device in the aorta.

In one embodiment, a reducing sheath is disposed between the fixed tube and the inner core tube, the reducing sheath limiting radial expansion of the implant device; the reducing sheath is arranged to effectively control expansion of the proximal end of the implanted instrument, so that the conveying system can better restrain and control position adjustment of the implanted instrument when the implanted instrument is not released after the centering adjustment device is released, and scraping is avoided in the adjustment process.

In one embodiment, the variable diameter sheath is provided with a channel through which the distal end of the centering adjustment device can pass when pre-assembled.

In a preferred embodiment, the channel on the reducing sheath is matched and arranged with the groove of the adjusting mechanism, and the design has the advantages that: when preassembling, the distal end part of the reducing sheath can be attached to the shape of the adjusting mechanism, and meanwhile, the distal end of the centering adjusting device can extend into the channel, so that the loading space of the conveying system is saved, and the adjusting effect of the centering adjusting device is better because the centering adjusting device is closer to an implantation instrument.

In another preferred embodiment, the second support section is provided with only support members, and a part of the support members pass through the passage and enter the variable diameter sheath, and when the centering adjustment device returns to the preset configuration, the part of the support members are withdrawn from the passage and support the inner core tube to realize centering adjustment.

In one embodiment, the inner core tube is connected with an implantation instrument through the adjusting mechanism, the far end of the adjusting mechanism is connected with the near end of the implantation instrument in a matching mode, the adjusting mechanism comprises a base fixedly connected to the far end of the inner core tube, and a plurality of connecting claws uniformly distributed on the base, and hole-shaped structures are arranged on the connecting claws.

In one embodiment, a plurality of control wires are further arranged between the inner tube and the inner core tube, a limiting hole is formed in the implantation instrument and penetrates through the hole-shaped structure, and the far end of each control wire penetrates through the limiting hole to form detachable connection.

In one embodiment, the control wire is made of nitinol wire with a diameter of 0.2mm to 0.5 mm.

In one embodiment, the controlled release device further comprises a restraining sheath and a stop member, the stop member being disposed on the inner tube, the stop member being connected to the distal end of the implantation instrument, the other end of the implantation instrument being always restrained within the restraining sheath by the stop member when the control handle is operated such that the restraining sheath moves distally and does not completely disengage from the other end of the implantation instrument.

In one embodiment, the stop member includes a stop and a pull disposed on a distal side of the stop, the stop and the pull being disposed on the inner tube, the pull being connected to a distal end of the implantation instrument, the pull being axially movable along the inner tube.

Compared with the prior art, the utility model has the advantages of:

1. different from the prior art, the centering adjusting device of the utility model comprises a first supporting section, a middle supporting section and a second supporting section, one end of the first supporting section is connected with the fixed pipe, the centering adjusting device is of a self-expanding net-shaped structure, when the centering adjusting device is preassembled, the centering adjusting device is limited between the fixed pipe and the outer sheath, when the outer sheath moves towards the near end by operating the control handle, the centering adjusting device recovers to a preset shape, the middle supporting section is tightly attached to the vascular wall to drive the inner core pipe and the implanting apparatus to realize radial position adjustment, in the whole process, the middle supporting section can be supported on the vascular wall to play a stabilizing role, the centering effect can be enhanced when the implanting apparatus is released, in addition, the net-shaped structure of the centering adjusting device can ensure the normal flow of blood in the operation process, and can collect thrombus impurities falling off in the operation process, and stroke is avoided.

2. Be different from prior art, the utility model discloses well guiding mechanism's near-end is provided with the recess, during the pre-installation, centering adjusting device's distal end is restricted in the recess, can save conveying system axial loading space, in addition, when conveying system gets into the aorta, centering adjusting device can arrive ascending aorta position along with implanting the apparatus together, and the recess has played the guide effect for the reasonable position location of centering adjusting device, has strengthened the centering effect to the apparatus is implanted in better release.

3. Be different from prior art, the utility model discloses well second supports the section and stabilizes centering adjusting device through the supporting member, has improved centering adjusting device's steadiness, and in addition, the supporting member is the toper pointed end around inner core pipe axial direction central symmetry distribution, the supporting member with inner core pipe axial direction is formed with angle an, has further strengthened the centering effect of implanting the apparatus.

4. Be different from prior art, the utility model discloses the junction of well first support section and middle support section has circular arc buffer segment, and the junction of second support section and middle support section has circular arc buffer segment, the epitheca impels or retracts the in-process to the near-end to the distal end, circular arc buffer segment and epitheca contact, can reduce the resistance, reduce the wound to the vascular wall.

Drawings

Fig. 1a to 1g are schematic structural views of an implant device delivery system in an embodiment, wherein fig. 1b, 1e and 1f are partially enlarged schematic views of fig. 1a, and fig. 1c and 1d are structural views of an adjustment mechanism.

Fig. 2a to 2d are a schematic configuration and a schematic structural diagram of a centering adjustment device releasing in a heart in the first embodiment, wherein fig. 2b is another embodiment of fig. 2a in which a supporting member forms an angle with an axial center, and fig. 2d is a schematic sectional view of the centering adjustment device.

Fig. 3a to 3f are schematic diagrams illustrating a process of releasing the centering adjustment device according to a first embodiment.

FIGS. 4 a-4 c are schematic diagrams illustrating a delivery system for an implantation instrument for adjusting the implantation instrument and completing the release process according to one embodiment.

Fig. 5a to 5c are schematic structural views of an implant device delivery system according to a second embodiment, wherein fig. 5b and 5c are enlarged partial views of fig. 5 a.

Fig. 6a to 6f are schematic diagrams illustrating a process of releasing the centering adjustment device according to a second embodiment.

Figures 7 a-7 c are schematic illustrations of a second embodiment of an implantable device delivery system with the implantable device delivery system configured to adjust the implantable device and effect delivery.

The names of the parts indicated by the numbers in the drawings are as follows: 1-an implantation instrument, 11-a limiting hole, 2-a control handle, 3-an inner tube, 4-an inner core tube, 5-a fixed tube, 6-an outer sheath, 61-a reducing sheath, 62-a channel, 7-an adjusting mechanism, 71-a base, 72-a connecting claw, 721-a hole-shaped structure, 73-a groove, 74-a control wire, 8-a control release device, 81-a limiting sheath, 82-a limiting member, 821-a limiting member, 822-a pull head, 9-a centering adjusting device, 91-a first support section, 911-an arc buffer section, 92-a second support section, 93-an intermediate support section, 921-a support member and 922-a connecting ring.

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 first embodiment is as follows:

in one embodiment, as shown in fig. 1a-1g, for example, to treat aortic valvular disease, a delivery system of an implantation apparatus 1 with a centering adjustment device 9 comprises an implantation apparatus 1, a control handle 2, an inner tube 3, an inner core tube 4, a fixed tube 5, an outer sheath 6, an adjustment mechanism 7 and a control release device 8, wherein the adjustment mechanism 7 is connected with the inner core tube 4, a proximal end of the implantation apparatus 1 is connected with a distal end of the adjustment mechanism 7 in a matching manner, the control release device 8 limits radial expansion of a distal end portion of the implantation apparatus 1, a centering adjustment device 9 is disposed between the fixed tube 5 and the outer sheath 6, the centering adjustment device 9 comprises a first support section 91, an intermediate support section 93 and a second support section 92, one end of the first support section 91 is connected with the fixed tube 5, the centering adjustment device 9 is a self-expanding mesh structure, during preassembling, the centering adjusting device 9 is limited between the fixing tube 5 and the outer sheath 6, when the control handle 2 is operated to enable the outer sheath 6 to move towards the near end, the centering adjusting device 9 recovers to a preset shape, the middle supporting section 93 is tightly attached to the vascular wall to drive the inner core tube 4 and the implanting instrument 1 to realize radial position adjustment, in the whole process, the centering adjusting device 9 can ensure that the implanting instrument 1 can accurately reach a target release position, in addition, the middle supporting section 93 can be supported on the vascular wall to play a role in stabilizing, the centering effect in the release process of the implanting instrument 1 can be enhanced, in addition, the mesh structure of the centering adjusting device 9 can ensure that blood normally flows in the operation process, thrombus impurities falling off in the operation process can be collected, and stroke is avoided.

The components and connection of the components of the delivery system of the implantation device 1 according to the present invention will be described in detail below with reference to the accompanying drawings.

In this embodiment, as shown in fig. 1b-1e, the proximal end of the adjusting mechanism 7 is provided with a groove 73, when pre-installed, the distal end of the centering and adjusting device 9 is limited in the groove 73, so as to save the axial loading space of the delivery system, when the delivery system enters the aorta, the centering and adjusting device 9 can reach the ascending aorta position together with the implantation instrument 1, the groove 73 plays a guiding role for the reasonable position positioning of the centering and adjusting device 9, so as to enhance the centering effect, so as to better release the implantation instrument 1, when the control handle 2 is operated to move the outer sheath 6 proximally, the distal end of the centering and adjusting device 9 moves proximally away from the groove 73 and restores to the preset shape, and the cross section of the groove 73 is trapezoidal in the axial center perpendicular to the inner core tube 4.

In this embodiment, as shown in fig. 2c to 2d, the second supporting section 92 includes a supporting member 921 and a connecting ring 922, one end of the supporting member 921 is fixedly connected to the centering adjustment device 9, the other end of the supporting member 921 is connected to the connecting ring 922, the connecting ring 922 is sleeved on the inner core tube 4, the second supporting section 92 stabilizes the centering adjustment device 9 through the supporting member 921, so as to improve the stability of the centering adjustment device 9, in addition, the supporting member 921 is symmetrically distributed around the axial center of the inner core tube 4 in a conical tip shape, and an angle a is formed between the supporting member 921 and the axial center of the inner core tube 4, so as to further enhance the centering effect of the implantation apparatus 1.

In this embodiment, the junction between the first support section 91 and the intermediate support section 93 has a circular arc buffer section 911, and the junction between the second support section 92 and the intermediate support section 93 has a circular arc buffer section, as shown in fig. 2c, during the process of advancing the outer sheath 6 to the distal end or retracting the outer sheath 6 to the proximal end, the circular arc buffer section 911 contacts with the outer sheath 6, so as to reduce the resistance and the trauma to the blood vessel wall.

In this embodiment, the number of the supporting members 921 is four, as shown in fig. 2 d.

In this embodiment, the inner core tube 4 is connected to the implantation instrument 1 through the adjustment mechanism 7, the distal end of the adjustment mechanism 7 is connected to the proximal end of the implantation instrument 1 in a matching manner, the adjustment mechanism 7 includes a base 71 fixedly connected to the distal end of the inner core tube 4, and a plurality of connection claws 72 uniformly distributed on the base 71, and the connection claws 72 are provided with hole-shaped structures 721, as shown in fig. 1c and 1 d.

In this embodiment, a plurality of control wires 74 are further disposed between the inner tube 3 and the inner core tube 4, a limiting hole 11 is disposed on the implantation instrument 1, the limiting hole 11 penetrates through the porous structure 721, and the distal ends of the control wires 74 penetrate through the limiting hole 11 to form a detachable connection, as shown in fig. 1e and 1 g.

In this embodiment, the controlled release device 8 further comprises a limiting sheath 81 and a limiting member 82, the limiting member 82 is arranged on the inner tube 3, the limiting member 82 is connected with the distal end of the implantation instrument 1, and when the control handle 2 is operated to enable the limiting sheath 81 to move towards the distal end and not to be completely separated from the other end of the implantation instrument 1, the other end of the implantation instrument 1 is always limited in the limiting sheath 81 by the limiting member 82, as shown in fig. 1 f.

In this embodiment, as shown in fig. 1a and 1f, the position-limiting member 82 includes a position-limiting part 821 and a pulling head 822 disposed at a distal end of the position-limiting part 821, as shown in fig. 1f, the position-limiting part 821 and the pulling head 822 are disposed on the inner tube 3, the pulling head 822 is connected to the distal end of the implantation instrument 1, and the pulling head 822 is axially movable along the inner tube 3.

The working process of the embodiment comprises the following steps:

1. the control handle 2 is operated to enable the implantation instrument 1 and the conveying system thereof to reversely puncture into the aorta through the femoral artery minimally invasive opening, the implantation instrument 1 and the conveying system thereof bend and cross the aortic arch, and then reach the ascending aorta and enter the focus position at the root of the aorta, as shown in figures 3a and 3 b.

2. Observing the development mark, moving the outer sheath 6 to the near end by operating the control handle 2, self-expanding the centering adjusting device 9 into a net structure and driving the inner core tube 4 and the implantation instrument 1 to realize radial position adjustment until the central axis of the implantation instrument 1 is vertical to the self valve ring surface, as shown in fig. 3 c-3 f.

3. The control handle 2 is operated to disengage the control release device 8 from the implantation instrument 1, the distal end of the implantation instrument 1 is released, the control handle 2 is operated to disengage the control wire 74 from the limiting hole 11, and the proximal end of the implantation instrument 1 is released, as shown in fig. 4a and 4 b.

4. After the implantation instrument 1 has been released to the target position, the control handle 2 is operated to move the outer sheath 6 distally until the centering adjustment means 9 is fully retracted in the outer sheath 6, as shown in fig. 4 c.

5. The operation handle 2 is controlled to withdraw the conveying system in the original way, and the operation process is completed.

The second embodiment is as follows:

in one embodiment, as shown in fig. 5a-5c, for example, to treat aortic valvular disease, a delivery system of an implantation device 1 with a centering adjustment device 9 includes an implantation device 1, a control handle 2, an inner tube 3, an inner core tube 4, a fixed tube 5, an outer sheath 6, an adjustment mechanism 7 and a control release device 8, wherein the adjustment mechanism 7 is connected with the inner core tube 4, a proximal end of the implantation device 1 is connected with a distal end of the adjustment mechanism 7 in a matching manner, a variable diameter sheath 61 is disposed between the fixed tube 5 and the inner core tube 4, and the variable diameter sheath 61 restricts the implantation device 1

The reducing sheath 61 can better control the release process of the implanting apparatus 1 and make it independent of the release process of the centering adjustment device 9, the operation is convenient, the control release device 8 limits the radial expansion of the distal end portion of the implanting apparatus 1, the centering adjustment device 9 is arranged between the fixing tube 5 and the outer sheath 6, the centering adjustment device 9 comprises a first support section 91, an intermediate support section 93 and a second support section 92, one end of the first support section 91 is connected with the fixing tube 5, the centering adjustment device 9 is of a self-expanding net structure, when the centering adjustment device 9 is pre-assembled, the centering adjustment device 9 is limited between the fixing tube 5 and the outer sheath 6, when the control handle 2 is operated to make the outer sheath 6 move towards the proximal end, the centering adjustment device 9 is restored to a preset shape, the intermediate support section 93 is tightly attached to the blood vessel wall to further drive the reducing sheath 61 and the implanting apparatus 1 to realize radial position adjustment, in the whole process, the middle supporting section 93 can support the vascular wall, plays a role in stabilization, can strengthen the centering effect of the release process of the implantation instrument 1, and in addition, the mesh structure of the centering adjusting device 9 can ensure the normal flow of blood in the operation process, can collect thrombus impurities falling off in the operation process, and avoids stroke.

The components and connections of the components of the delivery system of the implantation device 1 according to the present invention will be described in detail below with reference to the accompanying drawings:

in this embodiment, as shown in fig. 2c to 2d, the second support section 92 includes a support member 921 and a connection ring 922, one end of the support member 921 is fixedly connected to the centering adjustment device 9, the other end of the support member 921 is connected to the connection ring 922, when pre-assembling, the connection ring 922 is sleeved on the diameter-changing sheath 61, and the second support section 92 stabilizes the centering adjustment device 9 through the support member 921, so as to improve the centering adjustment device 9

In addition, the supporting members 921 are symmetrically distributed around the axial center of the reducing sheath 61 to form conical tips, and the angle a is formed between the supporting members 921 and the axial center of the inner core tube 4, so that the centering effect of the implantation instrument 1 is further enhanced.

In another embodiment, the second supporting section 92 is provided with only the supporting member 921, the part of the supporting member 921 passes through the channel 62 and enters the reducing sheath 61, when the centering adjustment device 9 is restored to the preset configuration, the part of the supporting member 921 is withdrawn from the channel 62 and supports the inner core tube 4, so as to achieve the centering adjustment.

In this embodiment, as shown in fig. 2c, a circular arc buffer segment 911 is provided at the junction between the first support segment 91 and the intermediate support segment 93, and a circular arc buffer segment 911 is provided at the junction between the second support segment 92 and the intermediate support segment 93, so that during the process of advancing the outer sheath 6 to the distal end or retracting the outer sheath 6 to the proximal end, the circular arc buffer segment 911 contacts the outer sheath 6, thereby reducing resistance and trauma to the blood vessel wall.

In this embodiment, the diameter-variable sheath 61 is provided with a channel 62, and when pre-assembled, the distal end of the centering adjustment device 9 can pass through the channel 62.

In this embodiment, the channel 62 on the variable diameter sheath 61 is correspondingly matched with the groove 73 of the adjusting mechanism 7, so that the design has the advantages that: when preassembling, the distal portion of the variable diameter sheath 61 can conform to the shape of the adjustment mechanism 7, and at the same time, the distal end of the centering adjustment device 9 can extend into the channel 62, so as to save the loading space of the delivery system, as shown in fig. 5 a.

In this embodiment, when pre-assembled, the implantation instrument 1 is positioned between the inner core tube 4 and the variable diameter sheath 61, as shown in fig. 5a and 5 c.

The working process of the embodiment comprises the following steps:

1. the control handle 2 is operated to enable the implantation instrument 1 and the conveying system thereof to reversely puncture into the aorta through the femoral artery minimally invasive opening, the implantation instrument 1 and the conveying system thereof bend and cross the aortic arch, and then reach the ascending aorta and enter the focus position at the root of the aorta, as shown in fig. 6a and 6 b.

2. Observing the development mark, moving the outer sheath 6 to the near end by operating the control handle 2, enabling the centering adjusting device 9 to automatically expand into a net structure, enabling the centering adjusting device 9 to drive the reducing sheath 61 and the implanting apparatus 1 to realize radial position adjustment until the central axis of the implanting apparatus 1 is perpendicular to the self valve ring surface, and operating the control handle 2 to enable the reducing sheath 61 to move to the near end, as shown in fig. 6c-6 f.

3. The control handle 2 is operated to disengage the control release device 8 from the implantation instrument 1, the distal end of the implantation instrument 1 is released, the control handle 2 is operated to disengage the control wire 74 from the limiting hole 11, and the proximal end of the implantation instrument 1 is released, as shown in fig. 7a and 7 b.

4. After the implantation instrument 1 has been released to the target position, the control handle 2 is operated to move the outer sheath 6 distally until the centering adjustment means 9 is fully retracted in the outer sheath 6, as shown in fig. 7 c.

Finally, it should be understood that the above description is only exemplary of the present invention and is not intended to limit the present invention, and that any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a take implantation apparatus conveying system of centering adjusting device, includes implantation apparatus, brake valve lever, inner tube, inner core pipe, fixed pipe, sheath, guiding mechanism and control release, its characterized in that: the adjusting mechanism is connected with the inner core tube, the near end of the implanting instrument is connected with the far end of the adjusting mechanism in a matching mode, the control releasing device limits the radial expansion of the far end portion of the implanting instrument, a centering adjusting device is arranged between the fixing tube and the outer sheath, the centering adjusting device comprises a first supporting section, a middle supporting section and a second supporting section, one end of the first supporting section is connected with the fixing tube, the centering adjusting device is of a self-expanding net-shaped structure, when the centering adjusting device is preassembled, the centering adjusting device is limited between the fixing tube and the outer sheath, when the outer sheath moves towards the near end through operation of the control handle, the centering adjusting device is restored to a preset shape, and the middle supporting section is tightly attached to the blood vessel wall to drive the inner core tube and the implanting instrument to achieve radial position adjustment.

2. The system of claim 1, wherein the centering adjustment device comprises: the proximal end of the adjustment mechanism is provided with a recess, the distal end of the centering adjustment device is confined within the recess when pre-installed, and the distal end of the centering adjustment device moves proximally away from the recess and returns to a preset shape when the control handle is operated to move the outer sheath proximally.

3. The system of claim 1, wherein the centering adjustment device comprises: the second support section comprises a support member and a connecting ring, one end of the support member is fixedly connected to the centering adjusting device, the other end of the support member is connected with the connecting ring, and the connecting ring is sleeved on the inner core tube.

4. The delivery system of claim 3, wherein the centering adjustment device comprises: the number of the supporting members is at least two.

5. The delivery system of claim 3, wherein the centering adjustment device comprises: the supporting members are symmetrically distributed around the axial center of the inner core tube and are conical tips,

the support member forms an angle a with the axial center of the core tube.

6. The system of claim 1, wherein the centering adjustment device comprises: and the joint of the first support section and the middle support section is provided with an arc buffer section.

7. The system of claim 1, wherein the centering adjustment device comprises: and the joint of the second support section and the middle support section is provided with an arc buffer section.

8. The system of claim 1, wherein the centering adjustment device comprises: a reducing sheath is arranged between the fixed tube and the inner core tube and limits the radial expansion of the implantation instrument.

9. The system of claim 8, wherein the centering adjustment device comprises: the diameter-variable sheath is provided with a channel, and when the diameter-variable sheath is preassembled, the far end of the centering adjusting device can penetrate through the channel.

10. The system of claim 1, wherein the centering adjustment device comprises: the inner core pipe passes through with implanting the apparatus guiding mechanism connects, guiding mechanism's distal end with the near-end cooperation of implanting the apparatus is connected, guiding mechanism includes that fixed connection is at the base of inner core pipe distal end, a plurality of equipartition set up the connection claw on the base, be provided with poroid structure on the connection claw.