CN105105870B

CN105105870B - Heart valve conveying device

Info

Publication number: CN105105870B
Application number: CN201510441909.5A
Authority: CN
Inventors: 虞奇峰; 王海山; 秦涛
Original assignee: Shanghai Microport Medical Group Co Ltd; Shanghai Newmed Medical Co Ltd
Current assignee: Shanghai Microport Medical Group Co Ltd; Shanghai Newmed Medical Co Ltd
Priority date: 2015-07-27
Filing date: 2015-07-27
Publication date: 2023-12-01
Anticipated expiration: 2035-07-27
Also published as: CN105105870A

Abstract

The invention discloses a prosthetic heart valve conveying device, and belongs to the field of medical appliances. The valve connecting mechanism is fixedly connected with the proximal end of the handle, the distal end of the inner tube is matched with the valve connecting mechanism, the proximal end of the inner tube is connected with the handle, the distal end of the outer tube is sleeved on the periphery of the inner tube and the valve connecting mechanism, and the proximal end of the outer tube is connected with the handle. The conveying device provided by the invention has a simple structure and ingenious design, stable connection and rapid and accurate release of the artificial heart valve can be realized through the cooperation movement of the inner tube and the outer tube, the artificial heart valve is subjected to two stages of half release and full release in the release process, the artificial heart valve in the half release state is close to the position and the form after the full release, the judgment of whether the release is proper or not is facilitated, and the artificial heart valve can be readjusted when the release is improper.

Description

Heart valve conveying device

Technical Field

The invention belongs to the field of medical appliances, and particularly relates to a prosthetic heart valve conveying device.

Technical Field

The heart is a very important organ of human body, provides power for human body blood circulation, and is divided into a left part and a right part, each part comprises a ventricle and an atrium, the ventricle and the atrium are separated by a ventricular septum and a atrial septum, and valves for preventing blood from flowing back are arranged among the atrium, the ventricle and the artery. Wherein the valve between the left atrium and the left ventricle is the mitral valve, the valve between the right atrium and the right ventricle is the tricuspid valve, the valve between the left ventricle and the aorta is the aortic valve, and the valve between the right ventricle and the pulmonary artery is the pulmonary valve.

The valve opens and closes in response to the heart's contraction and relaxation, and therefore the heart valve must withstand long-term blood and peripheral annulus compression and blood washout. If the valve is not fully closed or is insufficiently opened due to disease or other causes, regurgitation of blood and insufficient blood supply will result. Such as: the heart valve diseases are treated by stopping beating after chest opening, and under the support of low-temperature body circulation, the heart is opened to perform surgical repair of the valve or replacement of a prosthetic valve, and the heart is restarted after the operation is completed to complete subsequent operation. Surgical valve replacement surgery is traumatic and requires a long recovery time, so that elderly patients often have contraindicated surgery due to advanced age, physical weakness, severe lesions or complicated other diseases.

Minimally invasive surgical techniques are continually developed, wherein prosthetic heart valves can be introduced into a patient using catheters, i.e., the heart valves are placed by minimally invasive interventional procedures, which do not require chest opening, thus resulting in less trauma and rapid postoperative recovery, and a new solution is provided for heart valve stenosed patients whose life cannot be prolonged or whose pain can be alleviated by conventional current treatment means. Currently, the insertion of an interventional prosthetic heart valve into a body is usually performed by delivering the valve to a predetermined location by means of a delivery device. However, the existing conveying device cannot well meet application requirements, and particularly, a connecting mechanism between the conveying device and a prosthetic heart valve is single in function, stability of connection with the valve and accuracy of release are not high, connection and release operations are complex, a release process is single, and inaccurate positions are found only after the stent is unfolded, so that adjustment is difficult. Moreover, in current delivery devices release of the valve is accomplished primarily by moving the outer tube, which is typically accomplished by directly pushing and pulling the outer tube axially through a connector on the handle. The push-pull distance is not easy to control, valve displacement is caused by easy shaking during push-pull operation, the accuracy of the release position is affected, and the operation level requirement on a user is high.

Disclosure of Invention

The invention aims at the problems and provides a prosthetic heart valve conveying device which realizes stable connection and rapid and accurate release of a prosthetic heart valve through the matched movement of an inner tube and an outer tube.

The aim of the invention is achieved by the following technical scheme:

the utility model provides a prosthetic heart valve conveyor, includes handle, outer tube, inner tube and valve coupling mechanism, valve coupling mechanism and handle proximal end fixed connection for connect prosthetic heart valve, the inner tube distal end links to each other with valve coupling mechanism, the inner tube proximal end cooperatees with the handle, the outer tube distal end suit is in inner tube and valve coupling mechanism are peripheral, and the outer tube proximal end links to each other with the handle, through the handle can control inner tube and outer tube respectively and make it follow axial displacement, the outer tube is along axial withdrawal, can make prosthetic heart valve follow outer tube distal end and expose, the inner tube is along axial withdrawal can trigger valve coupling mechanism is released prosthetic heart valve is complete.

Alternatively, in the above-mentioned delivery device, the proximal end of the inner tube is connected to an inner tube moving mechanism on the handle, the proximal end of the outer tube is connected to an outer tube moving mechanism on the handle, the outer tube can be retracted by the outer tube moving mechanism, so that the prosthetic heart valve is exposed from the distal end of the outer tube, and the inner tube can be retracted by the inner tube moving mechanism, so that the prosthetic heart valve is completely released.

Alternatively, in the above-mentioned conveying device, the valve connecting mechanism includes a valve fixing post and a fixing post outer sleeve, a positioning groove is provided on an outer wall of a distal end of the valve fixing post, so that a conveyer connecting piece (hanging ear) on the prosthetic heart valve can be embedded in the positioning groove and cannot slip along an axial direction, a proximal end of the fixing post outer sleeve is fixedly connected with the inner tube, the fixing post outer sleeve can move along an axial direction relative to the fixing post under the driving of the inner tube, and the conveyer connecting piece can be prevented from falling out from the positioning groove along a radial direction when the fixing post outer sleeve moves to a position covering the positioning groove. The bracket can be hooked and fixed by the cooperation of the positioning groove and the outer sleeve with the hanging lugs on the heart valve bracket, and the bracket loaded into the conveyor is limited (the bracket does not have relative displacement relative to the grab handle of the conveyor). When the artificial heart valve is used, the outer sleeve of the fixed column is moved to expose the positioning groove, the conveyer connecting piece on the artificial heart valve is embedded into the positioning groove, the outer sleeve of the fixed column is moved to cover the positioning groove, the artificial heart valve can be prevented from falling off along the axial direction due to the positioning groove, the covering of the outer sleeve of the fixed column can prevent the artificial heart valve from falling off along the radial direction, so that the artificial heart valve is firmly connected to the valve connecting mechanism, the outer sleeve of the conveyer (sleeved on the outer sleeve of the fixed column and the periphery of the artificial heart valve) is moved to realize sheathing of the artificial heart valve, after the valve is conveyed to a preset position, the outer sleeve is retracted to realize sheathing of the artificial heart valve (at the moment, the artificial heart valve is partially unfolded, but the bracket is still connected with the conveyer, is not completely released, a doctor can observe whether the release position and state are proper, if the release position is improper, the sheathing adjustment position of the artificial heart valve can be realized again, fine adjustment can be directly performed), the outer sleeve of the fixed column is moved to expose the positioning groove, and at the moment, under the elastic action of the artificial heart valve, the automatic conveyer connecting piece is automatically released from the positioning groove along the radial direction.

Alternatively, the delivery device connector on the prosthetic heart valve has an enlarged end or narrowed neck, and the opening of the positioning slot is narrowed with a minimum width that is less than the maximum width of the end of the delivery device connector on the prosthetic heart valve, thereby ensuring that the delivery device connector does not slip axially from the positioning slot. Alternatively, the enlarged end of the conveyor connection is a rounded head. Optionally, the end part is a round head part with a hole in the center, and optionally, radial protrusions matched with the hole in the corresponding position in the positioning groove can be further arranged, and when the radial protrusions are connected, the radial protrusions are inserted into the holes, so that the connection is more stable.

As an alternative way, the end part of the conveyer connecting piece on the artificial heart valve is provided with a hole, the corresponding position in the positioning groove is provided with a radial protrusion matched with the hole, and when the conveyer connecting piece is connected, the protrusion is inserted into the hole, so that the connection is more stable, and the conveyer connecting piece can be prevented from being separated from the positioning groove along the axial direction.

Alternatively, the valve fixing post and the fixing post outer sleeve are in clearance fit, and the clearance between the valve fixing post and the fixing post outer sleeve at the corresponding position of the positioning groove is smaller than the maximum thickness of the end part of the conveyer connecting piece on the artificial heart valve, so that the conveyer connecting piece can be prevented from being separated from the positioning groove along the radial direction when the fixing post outer sleeve moves to the position covering the positioning groove.

Alternatively, the shape of the positioning groove is matched with that of the conveyer connecting piece, and the size of the positioning groove is slightly larger than that of the conveyer connecting piece, so that the end part of the conveyer connecting piece can be easily embedded into the positioning groove, and the purpose of quick and accurate connection is achieved.

Alternatively, the valve fixation post is fixedly connected to the proximal end of the valve delivery device such that it cannot move axially relative to the valve delivery device. During release, the fixed column is kept motionless, the release effect is achieved by withdrawing the outer sleeve of the fixed column, the position of the artificial heart valve cannot be moved in the release process, and accurate positioning release is easier to realize.

Alternatively, the valve fixation posts extend directly to the delivery device proximal end or are connected to the delivery device proximal end by wires.

Alternatively, the fixed column outer sleeve extends directly to the proximal end of the delivery device or is connected to the proximal end of the delivery device by an inner tube.

Alternatively, the valve fixing column is provided with an axial through hole. For passing through a guidewire or guidewire tube to facilitate guiding the delivery device with the guidewire during delivery. Further, the axial through hole is positioned at the axle center of the fixed column.

As an alternative mode, a plurality of constant head tanks are evenly distributed on the outer wall of the valve fixing column along the circumferential direction, a plurality of evenly distributed constant head tanks are arranged to enable positioning connection to be more stable, valve stress is more even, and disturbance to the valve during release is small. The number of the positioning grooves is 2-5, and the number of the positioning grooves is 3.

Alternatively, the valve fixing column is of a split structure: the fixing device is divided into a plurality of fixing claws along the circumferential direction, and positioning grooves are formed in the outer walls of the fixing claws. The fixing claws can be expanded to a certain extent during release, so that the release of the valve is smoother. Further, each stationary jaw is connected to the proximal end of the delivery device by a wire. The metal wires are used for connection, the flexibility degree is higher, and the external tension of a larger degree can be realized during release. The number of the fixing claws is 2-5, and further 3.

Alternatively, the proximal end of the outer sleeve of the fixed column is connected with the proximal end of the conveying device through an inner tube, and a plurality of axial through holes are formed in the inner tube and are used for accommodating metal wires or guide wires. Further, the axial through hole is provided with a wire guide hole and a plurality of wire holes, and the wire holes are used for accommodating wires connected with the fixing columns and ensuring that the inner tube can axially move along the wires so as to drive the outer sleeves of the fixing columns to move. The number of the wire holes can be 2-5, and preferably 3. The wire guide holes are positioned at the axle center of the inner tube and are uniformly distributed along the circumferential direction. When the axial through holes are formed in the fixing columns, the guide wire holes are coaxially communicated with the axial through holes in the fixing columns.

Alternatively, the distal end of the outer sleeve of the fixing column is divided into a plurality of fixing claw sleeves which are respectively sleeved outside the fixing claws. The outer sleeve of the fixed column is also designed in a split type, so that the outer sleeve of the fixed column and the fixed claw can be outwards expanded to a certain extent, the valve is fully unfolded before the stent is completely released, the valve is more similar to the state after the stent is completely released, and the judgment of the accuracy of the release position is also more facilitated.

Alternatively, a plurality of stationary jaw bushings are split into a column shape. The outer tube is conveniently sleeved and smoothly conveyed on the periphery after being spliced into a column shape.

Alternatively, the section of the fixing claw is in a sector shape or an ellipse shape.

Alternatively, in the above conveying device, the outer tube is connected to an outer tube moving mechanism provided on the handle, and the axial movement of the outer tube is controlled by the outer tube moving mechanism, and the outer tube moving mechanism includes a threaded tube, a rotary connector, and a connecting fin; the screw thread pipe fixed connection is on the handle and the suit is peripheral at the outer tube, is provided with axial hole groove on its pipe wall, and the pipe wall outside is provided with the screw thread, connecting fin and outer tube fixed connection, and fin tip follow stretch out screw thread pipe wall in the axial hole groove, the swivelling joint spare suit is in on the screw thread pipe, its inner wall is provided with the ring channel, the fin tip is located in the ring channel, and can follow the ring channel rotates, still be provided with screw thread interlock spare on the swivelling joint spare, screw thread interlock spare and screw thread interlock each other in the pipe wall outside of screw thread pipe can be realized through the rotation swivelling joint spare follows screw thread pipe axial displacement to promote the fin and drive the outer tube and do axial displacement. The axial movement of the outer tube is realized through rotating the rotary connecting piece, the degree of controllability and the accuracy of the movement of the outer tube are higher, and the accurate release of the artificial heart valve is easier to realize due to small shake caused by movement.

Alternatively, the axial bore groove extends to the end of the threaded tube. The threaded tube of this construction facilitates the installation of the outer tube and the connecting fins into the threaded tube from this end.

Alternatively, the threaded pipe is formed by splicing two identical threaded pieces, so that the threaded pipe is convenient to assemble. Furthermore, the split surfaces of the thread pieces are respectively provided with a locating pin and a pin hole, so that accurate alignment is facilitated.

Alternatively, the central axis of the axial slot coincides with the split line of the two thread segments. The fins are convenient to be installed in the axial hole slots during assembly.

Alternatively, the rotary connecting piece is formed by splicing two flaps. Furthermore, the two-flap rotary connecting piece is respectively provided with a locating pin and a pin hole or a locating column and a column hole, so that accurate alignment is facilitated. The two-flap rotary connecting piece can be aligned and fixedly connected through the screw.

Alternatively, the distal end of the threaded tube is fixedly connected to a distal connector in the handle of the delivery device, and the proximal end of the threaded tube is cooperatively connected to a gripping end in the handle of the delivery device. The far-end connecting piece is provided with a hole through which the outer tube can pass, and is also provided with a groove matched with the cross section size of the far end of the threaded tube, and the far end of the threaded tube is inserted into the groove to realize the fixed connection of the threaded tube and the threaded tube.

Alternatively, the threaded engagement member is adjustably disposed on the rotatable connection member such that the threaded engagement member is switchable between an engaged state and a disengaged state with respect to the threaded pipe. When the threaded engagement piece and the threaded pipe are in an engagement state, the threaded engagement piece is clamped between two adjacent teeth of the threads, so that the rotary connection piece cannot be directly pushed and pulled along the axial direction, only axial movement can be realized in a rotary mode, and when the threaded engagement piece and the threaded pipe are in a disengagement state, the threaded engagement piece is disengaged from the two adjacent teeth of the threads, and direct pushing and pulling along the axial direction can be realized. When in use, the valve can be switched between rotary pushing and direct axial pushing and pulling according to the needs, and the requirement of rapidly moving the outer tube when loading the valve can be met.

As an alternative way, the threaded engagement piece comprises a spring, a spring control button and two U-shaped push-pull locking pieces, wherein after the two U-shaped push-pull locking pieces are mutually staggered, a hole matched with the threaded pipe is formed, the threaded engagement piece can be sleeved on the threaded pipe and installed in the rotary connection piece (the relative position of the threaded engagement piece in the axial direction and the circumferential direction is fixed), the inner wall of the hole is provided with engagement teeth matched with threads on the outer wall of the threaded pipe, the spring arranged between the two U-shaped push-pull locking pieces enables the two U-shaped push-pull locking pieces to be mutually close, the hole formed between the two U-shaped push-pull locking pieces is reduced, so that the engagement teeth are clamped in the threads, the threaded engagement piece and the threaded pipe are in an engagement state, and the rotary connection piece can only realize axial movement on the threaded pipe through rotation; the spring is connected with the spring control button, the state of the spring can be changed through the spring control button, two U-shaped push-pull locking pieces are far away from each other, a hole formed between the two U-shaped push-pull locking pieces is enlarged, so that the engagement teeth are separated from the threads, the threaded engagement pieces and the threaded pipe are in a separation state, and the rotary connecting piece can directly axially move on the threaded pipe.

Alternatively, the number of springs is two, the openings of the U-shaped push-pull locking pieces are respectively formed with transverse protrusions extending towards the left side and the right side, spring mounting columns extending towards the bottoms of the U-shaped push-pull locking pieces are arranged on the protrusions, after the two U-shaped push-pull locking pieces are mutually staggered, the spring mounting columns are mutually aligned to form left and right groups of spring mounting sites, the two springs are respectively arranged in the two groups of spring mounting sites, so that the two U-shaped push-pull locking pieces are mutually close, the spring control keys are connected with the transverse protrusions and leak out of holes in the shell of the rotary connecting piece, and the springs are further compressed by pressing the spring control keys, so that the two U-shaped push-pull locking pieces are mutually far away.

Alternatively, the fin is fixed on an outer tube fixing member, and the outer tube fixing member is fixedly connected with the outer tube.

Alternatively, the end of the outer tube fixing part is provided with an external thread and a nut matched with the external thread, the outer diameter of the proximal end of the outer tube is increased, and the outer tube is fixedly connected with the outer tube fixing part in a detachable mode through the cooperation of the outer tube end structure and the external thread and the nut.

Alternatively, the outer tube fixing member is tubular. Further, the outer tube fixing piece further comprises an outer tube sealing device. The outer tube sealing device comprises an outer tube sealing ring and an outer tube sealing sheath, wherein the outer tube sealing ring is used for sealing a gap between the proximal end (outer wall of the inner tube) of the outer tube and the inner wall of the outer tube fixing piece, the outer tube sealing sheath is clamped in a clamping groove of the inner wall of the outer tube fixing piece and used for positioning the outer tube sealing ring, and a protrusion matched with the clamping groove of the inner wall of the outer tube fixing piece is arranged on the outer wall of the outer tube sealing sheath and can prevent the outer tube sealing sheath from rotating relative to the outer tube fixing piece along the circumferential direction. Further, be provided with the buckle on the outer wall of outer tube seal sheath, still be provided with on the outer tube mounting inner wall with above-mentioned snap fit's buckle hole, can prevent through the cooperation of buckle and buckle hole that outer tube seal sheath from following axial displacement relative to outer tube mounting outward. Further, the two sides of the buckle are provided with the hole grooves, so that the buckle has better elasticity, and is convenient to plug into the outer tube fixing piece and clamp into the buckle holes during installation.

Alternatively, an annular groove for mounting a damping ring is arranged on the outer wall of the proximal end of the outer tube fixing piece. The damping ring is positioned between the outer wall of the outer pipe fixing piece and the inner wall of the threaded pipe, and is in friction contact with the inner wall of the threaded pipe, so that certain friction resistance exists between the outer pipe fixing piece and the inner wall of the threaded pipe, and the rotary connecting piece is free of gaps in texture during rotation or pushing and pulling.

As an alternative mode, be provided with spacing post on the outer wall of outer tube mounting, spacing post card is gone into in the axial hole groove of screwed pipe and is restricted the axial displacement distance volume of outer tube mounting, prevents to crush the evacuation pipe.

Optionally, a water injection hole is further formed in the outer wall of the outer tube fixing part or the outer wall of the proximal end of the outer tube, the water injection hole is communicated with a gap between the outer tube and the inner tube, and physiological saline is injected into the water injection hole through the emptying tube to realize emptying operation.

In an alternative mode, in the conveying device, the inner tube is connected with an inner tube moving mechanism arranged on the handle, the inner tube moving mechanism is used for controlling the axial movement of the inner tube, the inner tube moving mechanism comprises a release control piece, an inner tube fixing piece and a moving executing piece, the moving executing piece is fixedly connected with the inner tube through the inner tube fixing piece, the release control piece is arranged on the handle of the conveying device, the inner tube fixing piece can be controlled to be switched between a locking state and an active state, and when the inner tube fixing piece is in the active state, the inner tube can be driven to move by moving the moving executing piece. The locked state refers to the fact that the inner tube fixing piece cannot axially move relative to the device handle, and the movable state refers to the fact that the inner tube fixing piece can axially move relative to the device handle.

As an alternative mode, be provided with the snap ring on the release control, be provided with on the inner tube mounting with snap ring matched with draw-in groove, the release control passes through elastic connection device and installs on the conveyor handle, the release control can do the small circle and remove along radial for the handle under elastic connection device's effect, but can not do axial displacement for the handle, the inner tube mounting cover is in the snap ring, the snap ring card goes into the draw-in groove makes the inner tube mounting is in the dead state of lock, makes through pressing the release control the snap ring deviate from in the draw-in groove, thereby makes the inner tube mounting is in the active state. Optionally, a slit is formed in the outer wall of the handle, and the clamping ring penetrates through the slit and stretches into the handle.

Alternatively, the elastic connection device comprises a self-elastic sheet and two supporting pieces, wherein the self-elastic sheet is respectively arranged on two opposite side walls of the release control piece, the release control piece is arranged between the two supporting pieces, the release control piece extends into the handle from the outer wall of the handle (through a slit), and the sheet is respectively arranged on the two supporting pieces.

Alternatively, the handle of the conveying device is divided into a holding end and an outer tube movement control section, the release control member is mounted on the holding end, the distal end of the inner tube fixing member is fixedly connected with the outer tube movement control section, and the outer tube movement control section is simultaneously used as the movement executing member.

Alternatively, the inner hole of the holding end is a stepped hole, an annular boss matched with the stepped hole is arranged on the outer wall of the inner pipe fixing piece, and the moving distance of the inner pipe can be limited through the matching of the annular boss and the stepped hole.

Alternatively, a groove with a certain length is axially formed in the inner wall of the holding end, a ridge matched with the groove is formed in the outer wall of the inner tube fixing piece, the ridge can slide in the groove along the axial direction, and the circumferential rotation of the inner tube can be limited by the ridge and the groove.

Alternatively, a sealing groove is arranged on the outer wall of the inner pipe fixing piece, and a sealing ring is arranged in the sealing groove and is used for sealing a gap possibly existing between the outer wall of the inner pipe fixing piece and the inner wall of the handle.

Alternatively, the outer wall of the inner tube fixing member is further provided with a wedge-shaped protrusion (buckle), the inner wall of the holding end is provided with a groove (buckle hole) matched with the wedge-shaped protrusion, and the outer sealing sheath of the outer tube can be prevented from moving axially relative to the outer tube fixing member through the matching of the buckle and the buckle hole. Further, the two sides of the buckle are provided with the hole grooves, so that the buckle has better elasticity, and is convenient to plug into the handle shell and clamp into the buckle holes during installation.

Alternatively, the outer wall of the inner pipe fixing piece is further provided with a cross groove for being fixedly connected with the outer pipe movement control section, and the inner wall of the outer pipe movement control section is provided with a cross protrusion matched with the cross groove. The cross groove and the cross protrusion are matched to limit the relative movement of the inner tube moving mechanism and the inner tube fixing piece in the axial direction and the circumferential direction at the same time, so that the effect of fixed connection is achieved.

Alternatively, the inner tube fixing member is sleeved on the proximal end of the inner tube and is adhered to the inner tube. The fixed connection between the inner tube fixing piece and the proximal end of the inner tube is ensured by adhesion, and the tightness between the inner tube fixing piece and the proximal end of the inner tube is ensured.

Alternatively, the delivery device may include a guidewire hole extending therethrough from a distal end to a proximal end of the delivery device. Further, the proximal end of the guidewire port is connected to a luer tube.

Alternatively, in the above conveying device, the handle includes a holding end, a threaded tube and a distal end connecting member, the threaded tube is fixedly connected between the holding end and the distal end connecting member, an axial hole groove is provided on a wall of the threaded tube, an outer tube moving mechanism is mounted on the threaded tube, and the outer tube moving mechanism is connected with a proximal end of the outer tube and is used for controlling axial movement of the outer tube; the inner tube is connected with the proximal end of the holding end through an inner tube fixing piece, a release control piece is arranged on the holding end and used for controlling the inner tube fixing piece to switch between a locking state and an active state, and when the inner tube fixing piece is in the active state, the inner tube can be driven to move by changing the axial relative position relation between the holding end and the threaded tube.

Alternatively, in the above-mentioned delivery device, the valve fixing post is fixedly connected to the proximal end of the handle by a wire, and further, the wire is fixed to a wire fixing member fixed to the proximal end of the handle. Optionally, maintaining a distance between the distal end of the wire anchor and the proximal end of the inner tube anchor facilitates axial movement of the inner tube anchor.

Alternatively, in the above-mentioned conveying device, a developing ring is provided at the distal end of the above-mentioned outer tube, and further the developing ring is made of platinum iridium alloy.

Alternatively, in the above-mentioned delivery device, a guide wire tube is fixed to the distal end of the inner tube, a tip is fixedly connected to the distal end of the guide wire tube, and a valve loading area is formed between the tip and the valve connecting mechanism. Optionally, the guide wire tube is fixed at the axle center of the inner tube and is communicated with the guide wire hole. Alternatively, the guide wire tube penetrates through the whole conveying device and is fixedly connected with the holding end of the handle, and the inner tube is sleeved on the guide wire tube and can axially slide along the guide wire tube.

Alternatively, in the above delivery device, the tip is a tapered head. Further, the proximal end of the tapered head portion is tapered in diameter to form a step shape, so that when the outer tube is moved, the proximal end of the tapered head portion can enter the lumen of the outer tube to be in clearance fit with the distal end of the outer tube. The proper matching length of the proximal end of the conical head and the distal end of the outer tube ensures that the outer tube cannot be notched when the conveyor is excessively bent. Further, an emptying groove is further formed in the conical head.

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, except for the mutually exclusive features and/or steps, may be combined in any combination

The invention has the beneficial effects that:

the conveying device provided by the invention has a simple structure and ingenious design, stable connection and rapid and accurate release of the artificial heart valve can be realized through the cooperation movement of the inner tube and the outer tube, the artificial heart valve is subjected to two stages of half release and full release in the release process, the artificial heart valve in the half release state is close to the position and the form after the full release, the judgment of whether the release is proper or not is facilitated, and the artificial heart valve can be readjusted when the release is improper.

Description of the drawings:

FIG. 1 is a schematic view showing the overall structure of a prosthetic heart valve delivery device according to embodiment 2;

FIG. 2 is a schematic view of a valve attachment mechanism in a prosthetic heart valve delivery device according to embodiment 2;

FIG. 3 is a schematic view showing the connection state of the valve connection mechanism and the valve holder according to embodiment 2;

fig. 4 is a schematic diagram of the claw structure of the valve connecting mechanism described in embodiment 2;

fig. 5 is a schematic structural view of the outer tube moving mechanism described in embodiment 2;

FIG. 6 is a schematic view of the structure of the screw bite described in example 2;

FIG. 7 is a schematic view showing the engagement of the threaded tube with the outer tube mount described in example 2;

fig. 8 is a schematic structural view of the inner tube moving mechanism described in embodiment 2;

FIG. 9 is a schematic perspective view of the outer tube and the tapered head in the state of being engaged in embodiment 2;

FIG. 10 is a schematic cross-sectional view of a valve attachment mechanism according to embodiment 1;

fig. 11 is a schematic view of the valve fixing claws or fixing posts of the embodiment 1 engaged with the bracket lugs.

Reference numerals: 1 is a handle, 2 is an outer tube moving mechanism, 3 is an inner tube moving mechanism, 4 is a valve connecting mechanism, 5 is a metal wire or metal rod, 6 is a metal wire or metal rod fixing piece, 7 is a conical head, 71 is a wire guide tube, 72 is an emptying groove, 8 is a luer, 9 is a prosthetic heart valve support, 11 is a distal end connecting piece, 12 is a handle holding end, 121 is a slit, 122 is a supporting piece, 21 is an outer tube, 22 is a threaded tube, 23 is a rotating connecting piece, 24 is an outer tube fixing piece, 241 is an outer tube fixing nut, 242 is an outer tube sealing ring, 243 is an outer tube sealing sheath, 244 is an annular groove, 245 is a water injection hole, 246 is a limiting column, 25 is an axial hole groove, 26 is a fin, 27 is a threaded engagement piece, 271 is a spring, 272 is a spring control button, 273 is a U-shaped push-pull locking piece, 274 is an engagement tooth, 31 is an inner tube, 32 is a release control piece, 321 is a clasp, 322 is a sheet, 33 is an inner tube fixing piece, 331 is an annular boss, 332 is an axial ridge, 41 is a fixing claw or a fixing claw, 42 is a fixing claw or a positioning column, 43 is a positioning column.

The specific embodiment is as follows:

the above-described aspects of the present invention will be described in further detail below by way of specific embodiments of the present invention. It should not be construed that the scope of the above subject matter of the present invention is limited to the following examples. Any modifications, equivalent substitutions or improvements made by those skilled in the art, without departing from the spirit and principles of the present invention, should be included within the scope of the present invention.

Example 1

The utility model provides a prosthetic heart valve conveyor, includes handle, outer tube, inner tube and valve coupling mechanism, valve coupling mechanism and handle proximal end fixed connection for connect prosthetic heart valve, the inner tube distal end links to each other with valve coupling mechanism, the inner tube proximal end links to each other with the handle, the outer tube distal end suit is in inner tube and valve coupling mechanism are peripheral, and the outer tube proximal end links to each other with the handle, through the handle can control inner tube and outer tube respectively and make it follow axial displacement, the outer tube is withdrawn along the axial, can make prosthetic heart valve follow the outer tube distal end and expose, the inner tube is withdrawn along the axial can trigger valve coupling mechanism is released prosthetic heart valve completely.

Alternatively, in the above-mentioned conveying device, the valve connecting mechanism includes a valve fixing post and a fixing post outer sleeve (as shown in fig. 10), a positioning groove is provided on an outer wall of a distal end of the valve fixing post, so that a conveyer connecting piece (hanging lug) on the prosthetic heart valve can be embedded in the positioning groove and cannot slip along an axial direction, a proximal end of the fixing post outer sleeve is fixedly connected with the inner tube, the fixing post outer sleeve can move along an axial direction relative to the fixing post under the driving of the inner tube, and the conveyer connecting piece can be prevented from falling out from the positioning groove along a radial direction when the fixing post outer sleeve moves to a position covering the positioning groove. The bracket can be hooked and fixed by the cooperation of the positioning groove and the outer sleeve with the hanging lugs on the heart valve bracket, and the bracket loaded into the conveyor is limited (the bracket does not have relative displacement relative to the grab handle of the conveyor). When the artificial heart valve is used, the outer sleeve of the fixed column is moved to expose the positioning groove, the conveyer connecting piece on the artificial heart valve is embedded into the positioning groove, the outer sleeve of the fixed column is moved to cover the positioning groove, the artificial heart valve can be prevented from falling off along the axial direction due to the positioning groove, the covering of the outer sleeve of the fixed column can prevent the artificial heart valve from falling off along the radial direction, so that the artificial heart valve is firmly connected to the valve connecting mechanism, the outer sleeve of the conveyer (sleeved on the outer sleeve of the fixed column and the periphery of the artificial heart valve) is moved to realize sheathing of the artificial heart valve, after the valve is conveyed to a preset position, the outer sleeve is retracted to realize sheathing of the artificial heart valve (at the moment, the artificial heart valve is partially unfolded, but the bracket is still connected with the conveyer, is not completely released, a doctor can observe whether the release position and state are proper, if the release position is improper, the sheathing adjustment position of the artificial heart valve can be realized again, fine adjustment can be directly performed), the outer sleeve of the fixed column is moved to expose the positioning groove, and at the moment, under the elastic action of the artificial heart valve, the automatic conveyer connecting piece is automatically released from the positioning groove along the radial direction.

Alternatively, the end of the conveyer connecting piece on the artificial heart valve is provided with a hole, a radial protrusion matched with the hole is arranged at a corresponding position in the positioning groove, and when the conveyer connecting piece is connected, the protrusion is inserted into the hole, so that the connection is more stable, and the conveyer connecting piece can be prevented from being axially separated from the positioning groove (as shown in fig. 11).

Alternatively, the threaded pipe is formed by splicing two symmetrical threaded pieces, so that the threaded pipe is convenient to assemble. Furthermore, the split surfaces of the thread pieces are respectively provided with a locating pin and a pin hole, so that accurate alignment is facilitated.

Alternatively, an annular groove for mounting a damping ring is arranged on the outer wall of the proximal end of the outer tube fixing piece. The damping ring is positioned between the outer wall of the outer pipe fixing piece and the inner wall of the threaded pipe, and is in friction contact with the inner wall of the threaded pipe, so that a certain friction resistance rotary connecting piece exists between the outer pipe fixing piece and the inner wall of the threaded pipe, and the rotary connecting piece is more textured and gapless in rotation or push-pull.

As an alternative mode, be provided with spacing post on the outer wall of outer tube mounting, spacing post card is gone into in the axial hole groove of screwed pipe and is restricted the axial displacement volume of outer tube mounting, prevents that the evacuation pipe from being extruded.

Alternatively, in the above conveying device, the handle includes a gripping end, a threaded tube and a distal end connecting member, the threaded tube is cooperatively connected between the gripping end and the distal end connecting member, an axial hole groove is provided on a wall of the threaded tube, and an outer tube moving mechanism is mounted on the threaded tube and connected to a proximal end of the outer tube for controlling axial movement of the outer tube; the inner tube is connected with the proximal end of the holding end through an inner tube fixing piece, a release control piece is arranged on the holding end and used for controlling the inner tube fixing piece to switch between a locking state and an active state, and when the inner tube fixing piece is in the active state, the inner tube can be driven to move by changing the axial relative position relation between the holding end and the threaded tube.

Example 2

The prosthetic heart valve delivery device shown in fig. 1-9, comprises a handle 1, an outer tube 21, an inner tube 31, a valve attachment mechanism 4, a tapered head 7, and a guidewire tube 71; the valve connecting mechanism comprises three independent bracket fixing claws 41 and three fixing claw outer sleeves 42 respectively sleeved on the bracket fixing claws, positioning grooves 43 which can be matched with hanging lugs on a heart valve prosthesis bracket are formed in the outer walls of the distal ends of the bracket fixing claws, the opening of each positioning groove 43 is narrowed, the minimum width of the opening of each positioning groove is smaller than the maximum width of the end part of a conveyor connecting piece on the heart valve prosthesis, so that the conveyor connecting piece cannot slide out of the positioning grooves along the axial direction, the proximal ends of the bracket fixing claws 41 are fixedly connected with the metal wire fixing pieces 6 through metal wires 5, and the metal wire fixing pieces 6 are fixed at the proximal ends of the handles, so that the axial distance between the bracket fixing claws 41 and the proximal ends of the handles 1 is kept unchanged; the distal end of the outer sleeve 42 of the fixed claw is in clearance fit with the fixed claw 41 of the bracket, the proximal end of the outer sleeve 42 of the fixed claw is fixedly connected with the distal end of the inner tube 31, 3 axial through holes through which the metal wires 5 can pass are arranged on the inner tube 31, the proximal end of the inner tube 31 is connected with the inner tube moving mechanism 3 on the handle 1, the distal end of the outer tube 21 is sleeved on the peripheries of the inner tube 31 and the valve connecting mechanism 4, and the proximal end of the outer tube 21 is connected with the outer tube moving mechanism 2 on the handle 1; the outer tube moving mechanism 2 comprises a threaded tube 22, a rotary connecting piece 23 and an outer tube fixing piece 24; the threaded pipe 22 is formed by splicing two symmetrical thread pieces, a pipe wall with a certain length at the splicing position is missing, an axial hole groove 25 (a locating pin and a pin hole can be respectively arranged on the splicing surfaces of the thread pieces) is formed on the pipe wall after splicing, threads are arranged on the outer pipe surface of the threaded pipe 22, the outer pipe fixing piece 24 is fixedly connected with the outer pipe 21 coaxially, fins 26 protruding outwards in the radial direction are arranged on the outer pipe surface of the outer pipe fixing piece 24, the outer pipe fixing piece 24 and the outer pipe 21 are sleeved in the threaded pipe 22 together, the fins 26 extend out of the pipe wall of the threaded pipe from the axial hole groove 25, the rotary connecting piece 23 is sleeved on the threaded pipe 22 (for convenient assembly, the rotary connecting piece can also be designed into two pieces which are mutually spliced), an annular groove is arranged on the inner wall of the threaded pipe, the end part of the fins 26 is positioned in the annular groove, the rotary connecting piece 23 can axially move through the fins 26 and the outer tube fixing piece 24 to drive the outer tube 21 to axially move, the rotary connecting piece 23 is also fixedly provided with a threaded engagement piece 27, the threaded engagement piece 27 comprises a spring 271 (preferably a pressure spring), a spring control key 272 and two U-shaped push-pull locking pieces 273, the two U-shaped push-pull locking pieces 273 are mutually staggered to form a hole matched with the threaded tube 22, the two U-shaped push-pull locking pieces 273 can be sleeved on the threaded tube 22 and are arranged in the rotary connecting piece 23 (fixed at opposite positions of the rotary connecting piece in the axial direction and the circumferential direction), the inner wall of the hole is provided with engagement teeth 274 matched with threads on the outer wall of the threaded tube, the spring arranged between the two U-shaped push-pull locking pieces 273 enables the two U-shaped push-pull locking pieces 273 to be mutually close, the hole formed between the two is smaller, so that the engagement teeth 274 are blocked into the threads, the threaded engagement member 27 and the threaded pipe 22 are in an engaged state, and the rotary connection member 23 can only axially move on the threaded pipe 22 through rotation; the spring 271 is connected with the spring control button 272, the spring control button 272 is exposed from a hole on the casing of the rotary connecting piece 23, the state of the spring can be changed by pressing the spring control button 272, two U-shaped push-pull locking pieces 273 are far away from each other, a hole formed between the two U-shaped push-pull locking pieces 273 is enlarged, so that the engagement teeth 274 are disengaged from the threads, the threaded engagement pieces and the threaded pipe are in a disengaged state, the rotary connecting piece can directly axially move on the threaded pipe, an external thread is arranged at the distal end part of the outer pipe fixing piece 24, the outer diameter of the proximal end part of the outer pipe 21 is enlarged, the outer pipe fixing piece is matched with the external thread and a nut 241 through the end part structure of the outer pipe 21, an axial through hole through which an inner pipe can pass is further arranged in the outer pipe fixing piece 24, an outer pipe sealing ring 242 and an outer pipe sealing sheath 243 are arranged in the axial through hole, the outer pipe sealing ring 242 is used for plugging a gap between the outer wall of the inner pipe and the inner wall of the outer pipe fixing piece, the outer pipe sealing sheath is clamped in a clamping groove of the inner wall of the fixing piece, the outer pipe sealing sheath is used for positioning the outer pipe and the outer pipe fixing piece, and the sealing sheath is matched with the outer pipe sealing sheath is prevented from rotating, and fixing the outer pipe sealing sheath. Furthermore, a buckle is arranged on the outer wall of the outer tube sealing sheath, a buckle hole matched with the buckle is also arranged on the inner wall of the outer tube fixing piece, and the outer tube sealing sheath can be prevented from moving axially relative to the outer tube fixing piece through the matching of the buckle and the buckle hole; furthermore, the two sides of the buckle are provided with the hole grooves, so that the buckle has better elasticity, and is convenient to plug into the outer tube fixing piece and clamp into the buckle holes during installation; an annular groove 244 for installing a damping ring is formed in the outer wall of the proximal end of the outer tube fixing piece 24, the damping ring is positioned between the outer wall of the outer tube fixing piece and the inner wall of the threaded tube, the damping ring is in friction contact with the inner wall of the threaded tube, and certain friction resistance exists between the outer tube fixing piece and the inner wall of the threaded tube, so that the rotary connecting piece has more texture and no gap during rotation or pushing and pulling; a limiting column 246 is arranged on the outer wall of the outer tube fixing piece 24, the limiting column is clamped into an axial hole groove of the threaded tube to limit the axial displacement of the outer tube fixing piece so as to prevent the emptying tube from being extruded, a water injection hole 245 is also arranged on the outer wall of the outer tube fixing piece or the outer wall of the proximal end of the outer tube, the water injection hole is communicated with a gap between the outer tube and the inner tube, and physiological saline is injected into the water injection hole through the emptying tube so as to realize emptying operation; the distal end of the threaded pipe 22 is fixedly connected with the distal end connecting piece 11, the proximal end of the threaded pipe 22 is connected with the handle holding end 12, three main structures forming the handle are arranged on the distal end connecting piece 11, a small hole for the outer pipe to pass through is further arranged on the distal end connecting piece 11, a large groove for the threaded pipe 22 to be inserted is further arranged in, at least one section of straight groove wall is arranged in the large groove, part of the pipe surface of the distal end of the threaded pipe 22 is designed into a plane, the threaded pipe 22 can be prevented from rotating by being inserted into the large groove to be matched with the straight groove wall, and a buckle hole can be respectively arranged on the wall of the threaded pipe and the wall of the large groove to prevent the threaded pipe from axially slipping, and the straight groove wall and the distal end of the threaded pipe 22 are arranged; the inner tube moving mechanism 3 comprises a release control member 32 and an inner tube fixing member 33, the inner tube fixing member 33 is tubular and sleeved at the proximal end of the inner tube 31 and is adhered to the inner tube 31, the inner tube fixing member 33 is fixedly connected with the proximal end of the threaded tube 22, (a cross groove is formed in the outer wall of the distal end of the inner tube fixing member 33, a cross protrusion matched with the cross groove is formed in the inner wall of the proximal end of the threaded tube 22, and the cross groove and the cross protrusion can be matched to limit the relative movement of the inner tube moving mechanism and the inner tube fixing member in the axial direction and the circumferential direction at the same time, so that the effect of fixed connection is achieved); the release control member 32 is provided with a clamping ring 321, the inner pipe fixing member 33 is provided with a clamping groove matched with the clamping ring 321, the clamping ring 321 extends into a pipe cavity of the handle holding end 12 along the radial direction from a slit 121 on the outer wall of the handle holding end 12, the release control member cannot axially move relative to the holding end due to the blocking of the slit, the inner pipe fixing member 33 axially penetrates into the clamping ring, the clamping ring 321 is clamped into the clamping groove, the inner pipe fixing member 33 is in a locking state and cannot axially move relative to the clamping ring, the two sides of the slit 121 are respectively fixed with a supporting member 122, the front side wall and the rear side wall of the release control member are respectively provided with a self-elastic sheet 322, the sheets are respectively placed on the two supporting members 122, when the release control member 32 is pressed, the clamping ring 321 moves downwards and is separated from the clamping groove, so that the inner pipe fixing member 33 can axially move relative to the clamping ring, and the inner pipe fixing member can be driven to axially move by axially pushing and pulling the threaded pipe 22; the inner hole at the distal end of the holding end 12 is a stepped hole, an annular boss 331 matched with the stepped hole is arranged on the outer wall of the inner tube fixing member 33, the moving distance of the inner tube can be limited by the matching of the annular boss and the stepped hole, alternatively, a groove with a certain length is axially arranged on the inner wall of the holding end, a ridge 332 matched with the groove is arranged on the outer wall of the inner tube fixing member, the ridge can axially slide in the groove, and the ridge and the groove can limit the rotation of the inner tube fixing member by matching; a sealing groove is formed in the outer wall of the inner pipe fixing piece, and a sealing ring is arranged in the sealing groove and used for sealing a gap possibly existing between the outer wall of the inner pipe fixing piece and the inner wall of the handle; the outer wall of the inner tube fixing piece is also provided with a wedge-shaped protrusion (buckle), the inner wall of the holding end is provided with a groove (buckle hole) matched with the wedge-shaped protrusion, the outer side of the outer tube sealing sheath can be prevented from moving along the axial direction relative to the outer tube fixing piece through the matching of the buckle and the buckle hole, further, the two sides of the buckle are provided with hole grooves, so that the buckle has better elasticity, is convenient to plug into the handle shell and clamp into the buckle hole during installation, the wire or the metal rod fixing piece 6 is fixed at the proximal end of the holding end 12, a certain distance is kept between the wire or the metal rod fixing piece 6 and the inner tube fixing piece 33 so as to ensure that the inner tube fixing piece 33 can move backwards for a certain distance in an active state, the proximal end of the wire or the metal rod fixing piece 6 is connected with the luer interface 8, the wire hole 71 is fixedly connected in an axle center through hole of the wire or the metal rod fixing piece 6, and the whole conveying device is convenient to plug into the buckle hole during installation, the wire can penetrate through the axle center of the whole conveying device, so that the wire can be used for guiding the conveying device, the wire or the wire fixing piece 6 and the inner tube fixing piece are connected with the valve 7 through the conical head portion 7. Further, the proximal end of the tapered head portion is tapered in diameter to form a step shape, so that when the outer tube is moved, the proximal end of the tapered head portion can enter the lumen of the outer tube to be in clearance fit with the distal end of the outer tube. The proper matching length of the proximal end of the conical head and the distal end of the outer tube ensures that the outer tube cannot be notched when the conveyor is excessively bent. Further, an evacuation groove 72 is provided in the conical head. Further, the wire or metal rod fixing member 6 is further provided with an annular groove, and a sealing ring is arranged in the annular groove.

Alternatively, in the above-mentioned delivery device, after the guide wire tube 71 extends from the distal end of the delivery device to the inner tube 31, it is fixedly connected to the axial through hole of the inner tube 31, and does not extend further toward the proximal end of the handle, and the subsequent portion is formed into a guide wire hole by communicating the inner tube 31 with the axial direction penetrating the wire or rod holder 6.

During loading, one hand holds the far-end connecting piece 11 or the holding end 12, the other hand holds the spring control key 272 and pulls the rotary connecting piece 23 backwards, the outer tube is driven to retract to expose the film transfer area, then one hand holds the holding end and holds the release control piece 32 and does not put, the other hand holds the rotary connecting piece 23 or the threaded tube 22 or the far-end connecting piece 11 and pulls the inner tube and the outer tube 42 of the fixed claw backwards, the positioning groove 43 on the fixed claw is exposed, the hanging lugs on the artificial heart valve support are clamped into the positioning groove 43, the rotary connecting piece 23 or the threaded tube 22 or the far-end connecting piece 11 is pulled backwards, the inner tube and the outer tube of the fixed claw are driven to move back to cover the positioning groove 43, the fixed connection between the support and the conveying device is realized, the other hand holds the far-end connecting piece 11, the other hand holds the spring control key 23 is not put and pulls the rotary connecting piece 23 forwards, the outer tube is driven to move forwards, the stepped near end of the conical head enters the tube cavity, and the sheath of the support is realized.

During conveying, one hand holds the far-end connecting piece 11, the other hand rotates the rotary connecting piece 23 until the stent completely releases the outer tube, so that the sheath discharging action of the stent is realized, but the stent is not completely released (the sheath discharging action of the stent is realized by retracting the outer tube in a rotary mode, the distance is easy to control, the displacement of the valve caused by shaking during push-pull operation can be avoided, the operation is simple, and at the moment, because the fixed claw and the outer sleeve thereof are all in a split type design, the valve can be outwards stretched to a certain extent, so that the valve is fully unfolded before the stent is completely released, and is more close to the state after the stent is completely released, and the judgment on the accuracy of the release position is also more facilitated); judging the release position of the stent by auxiliary equipment, if the position is not proper, moving the outer tube forward again to enable the stent to enter the sheath and then readjusting the position; after the position is proper, then one hand holds the holding end and holds the release control piece 32 without releasing, and the other hand holds the rotary connecting piece 23 or the threaded pipe 22 or the far-end connecting piece 11 to pull backwards to drive the inner pipe and the outer sleeve 42 of the fixed claw to withdraw, so as to release the bracket (the bracket is completely separated from the conveyor, and the design that a plurality of fixed claws are connected and matched with metal wires is adopted, so that the fixed claws can be outwards stretched to a certain extent during release, and the release of the valve is smoother); at this point, the release control 32 can be released, the other hand can press the spring control button 272 without releasing and simultaneously pull the rotary connector 23 forward (quick return of the conveyor), and finally withdraw the conveyor to complete the procedure.

The foregoing description of the preferred embodiments of the present invention is merely illustrative, and not restrictive, of the invention. It will be appreciated by those skilled in the art that many variations, modifications and even equivalent changes may be made thereto, within the spirit and scope of the invention as defined in the appended claims, but are to be accorded the full scope of the invention.

Claims

1. A prosthetic heart valve delivery device comprising a handle, an outer tube, an inner tube, and a valve attachment mechanism comprising a valve fixation post and a fixation post outer sleeve; the valve fixing column comprises a plurality of fixing claws distributed along the circumferential direction of the valve fixing column, the fixing claws are fixedly connected with the proximal end of the handle, and positioning grooves are formed in the outer walls of the fixing claws, so that a conveyer connecting piece on the artificial heart valve can be embedded into the positioning grooves and cannot slide along the axial direction; the distal end of the outer sleeve of the fixed column is divided into a plurality of fixed claw sleeves which are respectively sleeved outside the fixed claws; the outer tube is characterized in that the distal end of the inner tube is fixedly connected with the proximal end of the outer tube of the fixed column, the proximal end of the inner tube is connected with the handle, the distal end of the outer tube is sleeved on the periphery of the inner tube and the valve connecting mechanism, the proximal end of the outer tube is connected with the handle, the inner tube and the outer tube can be respectively controlled to move along the axial direction through the handle, the outer tube is withdrawn along the axial direction, the artificial heart valve can be exposed out of the distal end of the outer tube, the inner tube can drive the outer tube of the fixed column to move to a position covering the positioning groove along the axial direction, the conveyer connecting piece can be prevented from being separated from the positioning groove along the radial direction, and the inner tube can be withdrawn along the axial direction to trigger the valve connecting mechanism to completely release the artificial heart valve.

2. The prosthetic heart valve delivery device of claim 1, wherein the outer tube is in communication with an outer tube movement mechanism provided on the handle, the outer tube movement mechanism controlling axial movement of the outer tube, the outer tube movement mechanism comprising a threaded tube, a rotational connector, a connector fin; the screw thread pipe fixed connection is on the handle and the suit is peripheral at the outer tube, is provided with axial hole groove on its pipe wall, and the pipe wall outside is provided with the screw thread, connecting fin and outer tube fixed connection, and fin tip follow stretch out screw thread pipe wall in the axial hole groove, the swivelling joint spare suit is in on the screw thread pipe, its inner wall is provided with the ring channel, the fin tip is located in the ring channel, and can follow the ring channel rotates, still be fixed with screw thread interlock spare on the swivelling joint spare, screw thread interlock spare and screw thread interlock each other in the pipe wall outside of screw thread pipe can be realized through the rotation swivelling joint spare follows screw thread pipe axial displacement to promote the fin and drive outer tube mounting and outer tube and do axial displacement.

3. The prosthetic heart valve delivery device of claim 2, wherein the threaded engagement member is adjustably disposed on the rotational coupling member such that the threaded engagement member is switchable between an engaged state and a disengaged state with the threaded tube.

4. The prosthetic heart valve delivery device of claim 1, wherein the inner tube is coupled to an inner tube movement mechanism disposed on the handle, wherein the inner tube movement mechanism controls axial movement of the inner tube, wherein the inner tube movement mechanism comprises a release control member, an inner tube fixing member, and a movement actuator, wherein the movement actuator is fixedly coupled to the inner tube via the inner tube fixing member, wherein the release control member is disposed on the handle of the delivery device and is configured to control the inner tube fixing member to switch between a locked state and an active state, and wherein movement of the inner tube is provided by moving the movement actuator when the inner tube fixing member is in the active state.

5. The prosthetic heart valve delivery device of claim 4, wherein the release control is provided with a snap ring, the inner tube mount is provided with a snap groove that mates with the snap ring, the release control is mounted on the delivery device handle via an elastic connection, the snap ring snaps into the snap groove to place the inner tube mount in a locked state, and the release control is pressed to disengage the snap ring from the snap groove to place the inner tube mount in an active state.

6. The prosthetic heart valve delivery device of claim 4, comprising a guidewire aperture extending therethrough from a distal end to a proximal end of the delivery device.

7. The prosthetic heart valve delivery device of claim 1, wherein the handle comprises a gripping end, a threaded tube and a distal connector, the threaded tube being fixedly connected between the gripping end and the distal connector, an axial slot being provided in a wall of the threaded tube, an outer tube movement mechanism being mounted within the threaded tube, the outer tube movement mechanism being coupled to a proximal end of the outer tube for controlling axial movement of the outer tube; the inner tube is connected with the proximal end of the threaded tube through an inner tube fixing piece, a release control piece is arranged on the holding end and used for controlling the inner tube fixing piece to switch between a locking state and an active state, and when the inner tube fixing piece is in the active state, the inner tube can be driven to move by changing the axial relative position relation between the holding end and the threaded tube.