CN209827107U - Delivery system for delivering an implant and drive handle - Google Patents

Abstract

The utility model relates to a conveying system and a driving handle for conveying an implant, which can control a sheath tube for conveying the implant to do rapid or slow motion. The driving handle of the utility model comprises a shell, a fixing part, a first driving mechanism and a gear transmission mechanism, wherein the gear transmission mechanism is arranged in the shell, the input section of the gear transmission mechanism is connected with the first driving mechanism, and the output section of the gear transmission mechanism is connected with the fixing part and is used for being driven by the input section to rotate; the first driving mechanism is used for driving the gear transmission mechanism to drive the fixing piece to move along the axis of the driving handle, and the gear transmission mechanism is used for outputting a plurality of transmission ratios and selectively driving the fixing piece to move through one of the transmission ratios. The conveying system of the utility model comprises a driving handle, an outer pipe and an inner pipe component; the inner tube assembly is arranged in the outer tube in a penetrating mode and used for fixing the implant and keeps static relative to the shell; the outer tube is connected with the fixed part, and the fixed part is used for driving the outer tube to move axially relative to the inner tube assembly.

Description

Delivery system for delivering an implant and drive handle

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a conveying system and actuating handle for carrying implant.

Background

With the development of socio-economic and the aging of population, the incidence rate of valvular heart disease is obviously increased, and researches show that the incidence rate of valvular heart disease in the aged people over 75 years old is up to 13.3%. At present, the traditional surgical treatment is still the first treatment method for patients with severe valvular diseases, but for the patients with advanced age, complicated multiple organ diseases, chest-open operation history and poor cardiac function, the traditional surgical treatment has high risk and high death rate, and some patients even have no operation chance.

The transcatheter heart valve operation has the advantages of no need of thoracotomy, small wound, quick recovery of patients and the like, and is widely concerned by experts and scholars. This operation needs to send into through the femoral artery and intervene the pipe, carries the valve to aortic valve district and opens to accomplish the artificial valve and put into, resume valve function. The implantation of the valve is typically performed with the aid of a delivery system that does not leave the sheath carrying the valve and the handle that drives the movement of the sheath, and which plays a crucial role during the procedure.

According to clinical requirements, when the preoperative valve is loaded, the handle is expected to realize quick withdrawal and slow advancement of the sheath tube, so that the loading efficiency is improved, and the loading success rate is ensured; in the process of valve implantation, the positioning needs to be as accurate as possible, and the slower the valve release speed is, the better the sheath withdrawal speed is; furthermore, for a retrievable valve, if retrieval and redeployment are required during implantation, the faster the valve is retrieved, the more efficient it is, the more beneficial the procedure, i.e., the faster the sheath is advanced. Generally, different stages of the operation have different requirements for the fast and slow operation of the handle. However, when the valve is released and retracted, the conventional handle cannot adjust the advancing and retracting speed of the sheath, so that the operator cannot control the implantation speed and the implantation position of the valve, the positioning error is large, and the operation efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a conveying system and actuating handle for carrying the implant to solve actuating handle wherein and according to the needs of actual operation, can control the sheath pipe that is used for carrying the implant and do quick or slow motion, realize more accurate positioning control and the more efficient operation of implant implantation in-process, and reduce the operation degree of difficulty.

To achieve the above object, the present invention provides a driving handle for delivering an implant, comprising: the device comprises a shell, a fixing piece, a gear transmission mechanism and a first driving mechanism; the gear transmission mechanism is arranged in the shell and comprises an input section and an output section, the input section is connected with the first driving mechanism, and meanwhile, the output section is connected with the fixing piece and is used for being driven by the input section to rotate;

wherein: the first driving mechanism is used for driving the gear transmission mechanism to drive the fixing piece to move along the axis of the driving handle, and the gear transmission mechanism is used for outputting a plurality of transmission ratios and selectively driving the fixing piece to move through one of the transmission ratios.

Optionally, the input section comprises a driving shaft and a driving wheel, the driving wheel is arranged on the driving shaft, and the driving shaft is connected with the first driving mechanism; meanwhile, the output section comprises a driven shaft and a driven wheel, the driven wheel is arranged on the driven shaft, the driven shaft is connected with the fixing piece, and the rotary motion of the driven shaft is converted into the movement of the fixing piece along the axial direction of the driving handle;

wherein: the number of the driving wheels is at least one, the number of the driven wheels is multiple, and the at least one driving wheel is used for being selectively meshed with one of the driven wheels so that the gear transmission mechanism can output multiple transmission ratios; or, the number of the driven wheels is at least one, the number of the driving wheels is multiple, and the at least one driven wheel is used for being selectively meshed with one of the driving wheels so that the gear transmission mechanism can output multiple transmission ratios.

Optionally, the number of the driving wheels is equal to that of the driven wheels, and each driving wheel is used for being meshed with one corresponding driven wheel.

Optionally, the driving shaft and the driven shaft are arranged in parallel, the moving direction of the fixing piece is the axial direction of the driven shaft, and meanwhile, the fixing piece is connected with the driven shaft in a spiral pair mode.

Optionally, the first driving mechanism is a manual driving mechanism.

Optionally, the manual driving mechanism includes a knob, and the knob is disposed outside the housing and connected to the input section.

Optionally, the driving handle further comprises:

the second driving mechanism is arranged on the shell and used for adjusting the transmission ratio of the gear transmission mechanism so that the gear transmission mechanism outputs one of the transmission ratios.

Optionally, the second driving mechanism includes a shifting fork, the shifting fork is movably disposed on the housing and is used for driving the driving shaft to move axially, so that a driving wheel corresponding to the driving shaft is engaged with a driven wheel corresponding to the driven shaft, thereby limiting the gear transmission mechanism to output one of the plurality of transmission ratios.

Optionally, the shifting fork has a plurality of moving positions relative to the housing, and the plurality of moving positions correspond to the plurality of transmission ratios one to one; when the shifting fork is driven by external force to move to one of the plurality of moving positions, the gear transmission mechanism is limited to output one of the plurality of transmission ratios.

Optionally, a part of the shifting fork is arranged outside the shell, and the other part of the shifting fork extends into the shell and is connected with the driving shaft; alternatively, the first and second electrodes may be,

one part of the shifting fork is arranged outside the shell, and the other part of the shifting fork extends into the shell and is used for driving the driving shaft to move through the driving wheel.

Optionally, the fixing member is held circumferentially stationary relative to the housing, and at least a portion of the fixing member is movably disposed in the housing.

To achieve the above object, the present invention further provides a delivery system for delivering an implant, comprising a driving handle for delivering an implant according to any one of the above, and further comprising an outer tube and an inner tube assembly;

the inner tube assembly is arranged in the outer tube in a penetrating mode and used for fixing the implant and is kept static relative to the shell; the outer tube is connected with the fixing piece of the driving handle, and the fixing piece is used for driving the outer tube to move axially relative to the inner tube assembly.

Optionally, a portion of the outer tube is inserted into and connected to the fixing member.

Optionally, the inner pipe assembly passes through the output section of the gear transmission mechanism and then is connected with the housing.

Optionally, the inner tube assembly is disposed outside the gear assembly and connected to the housing.

In the delivery system and the actuating handle for delivering the implant provided by the present invention, the implant such as the heart valve needs to be implanted by the delivery system. The utility model discloses a conveying system includes actuating handle, outer tube and inner tube subassembly, the inner tube subassembly is used for fixed implant, and the utility model discloses an actuating handle includes casing, mounting, gear drive and a actuating mechanism. During the in-service use, mounting and outer union coupling, and then remove in order to drive the mounting along the axis of brake valve lever through a actuating mechanism drive gear drive mechanism, can drive the outer tube and be axial motion for the inner tube subassembly, and the utility model discloses a gear drive mechanism can export a plurality of drive ratios, can make gear drive mechanism drive mounting do fast and slow motion through a plurality of drive ratios, and then realize that the quick back-up of outer tube advances with slow speed, also can control the quick advance and the slow speed back-up of outer tube to in the different stages of operation, can satisfy different operation requirements. Meanwhile, the multi-stage speed regulation is realized by adopting a plurality of transmission ratios of the gear transmission mechanism, and for an operator, the corresponding optimal speed can be more clear when the operation is at a certain stage, so that the speed and the position of the implant can be accurately controlled, the operation efficiency is improved, the operation effect is improved, and the operation difficulty is reduced.

The utility model discloses a gear drive is preferred to be including the action wheel, from driving wheel, driving shaft and driven shaft, through changing the action wheel and from the drive ratio between the driving wheel, can realize multistage speed governing, simple structure not only, and transmission control's precision is high moreover, can realize more accurate positioning control. And, the utility model discloses a preferred manual drive mechanism of first actuating mechanism, for example the knob, during actual operation, the operator only need according to current operation needs, through the rotating knob, can conveniently adjust gear drive to a specific drive ratio fast, and such multistage adjustment is more convenient, is favorable to doing more quick and accurate adjustment to the speed.

Drawings

Fig. 1 is a schematic view of a delivery system for delivering an implant according to an embodiment of the present invention;

FIG. 2a is a perspective view of a drive handle for delivering an implant according to one embodiment of the present invention;

FIG. 2b is a front view of a drive handle for delivering an implant according to an embodiment of the present invention;

FIG. 2c is an axial cross-sectional view of a drive handle for delivering an implant according to an embodiment of the present invention, wherein a second drive wheel is engaged with a second driven wheel;

FIG. 2d is an axial cross-sectional view of a drive handle for delivering an implant according to an embodiment of the present invention, wherein a first driving wheel is engaged with a first driven wheel;

FIG. 3a is a partial schematic view of a drive handle for delivering an implant according to an embodiment of the present invention, wherein the dashed lines show the invisible portions;

FIG. 3b is a partial cross-sectional view of a drive handle for delivering an implant according to an embodiment of the present invention;

FIG. 4 is a schematic view of the connection of a driving handle for delivering an implant to an outer tube according to an embodiment of the present invention;

fig. 5 is a schematic view of a valve stent loaded between an inner tube and an outer tube according to an embodiment of the present invention.

The designations in the figures illustrate the following:

a driving handle 10; a shell-1; proximal recess-111; distal recess-112; a first drive mechanism-2; a knob-21; a gear transmission mechanism-3; a drive shaft-31; a drive wheel-32; a first driving wheel-321; a second drive wheel-322; a driven shaft-33; a first connection section-331; a second connecting section-332; a driven pulley-34; a first driven wheel-341; a second driven pulley-342; a fixing piece-4; a first connection-41; a second connecting portion-42; a second drive mechanism-5; a shifting fork-51; catheter assembly-20; an outer tube-11; an inner tube assembly-12; a cone head-121; a fixed head-122; an inner tube-123; valve stent-30.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the following description, for ease of description, "distal" and "proximal", "axial" and "circumferential" are used; "distal" is the side away from the operator of the delivery system; "proximal" is the side proximal to the operator of the delivery system; "axial" refers to a direction along the axis of the drive handle; "circumferential" refers to the axial direction about the corresponding machine component. Furthermore, in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

The core idea of the utility model is to provide a delivery system and a driving handle for delivering an implant. Wherein the delivery system comprises a drive handle and an outer tube and inner tube assembly. The utility model discloses in, the inner tube subassembly is worn to establish in the outer tube and be used for fixed implant, just the inner tube subassembly with the casing still keeps relative still, simultaneously the outer tube is connected with the mounting.

In addition, the driving handle comprises a shell, a fixing piece, a first driving mechanism and a gear transmission mechanism; the gear transmission mechanism is arranged in the shell and comprises an input section and an output section, the input section is connected with the first driving mechanism, and meanwhile, the output section is connected with the fixing piece and is used for being driven by the input section to rotate. In practical application, the first driving mechanism is used for driving the gear transmission mechanism to drive the fixing piece to move along the axis of the driving handle, the gear transmission mechanism is used for outputting a plurality of transmission ratios, and selectively drives the fixing piece to move through one of the plurality of transmission ratios, the fixing piece drives the outer pipe to move axially relative to the inner pipe assembly, and in this way, the fixing piece can move along the axis of the driving handle at different speeds, so that the quick and slow movement of the outer pipe is realized.

Furthermore, the input section comprises a driving shaft and a driving wheel, the driving wheel is arranged on the driving shaft, and the driving shaft is connected with the first driving mechanism; meanwhile, the output section comprises a driven shaft and a driven wheel, the driven wheel is arranged on the driven shaft, the driven shaft is connected with the fixing piece, and the rotary motion of the driven shaft is converted into the movement of the fixing piece along the axis direction of the driving handle.

In one embodiment, the number of the driving wheels is at least one, and the number of the driven wheels is multiple, and at least one driving wheel is used for being selectively meshed with one of the driven wheels so that the gear transmission mechanism can output multiple gear ratios.

In one embodiment, the number of the driven wheels is at least one, the number of the driving wheels is multiple, and at least one driven wheel is used for being selectively meshed with one of the driving wheels so that the gear transmission mechanism can output multiple gear ratios.

In other embodiments, the number of the driving wheels and the number of the driven wheels are the same, and each driving wheel is used for being meshed with one corresponding driven wheel. In this arrangement, the drive wheels and the driven wheels are in a one-to-one paired relationship, with one drive wheel being engaged with only a selected one of the driven wheels.

Therefore, in the utility model discloses in, gear drive is in under first actuating mechanism's the drive, drive the mounting is along the axis motion of driving handle to the synchronous drive outer tube advances or withdraws, with this operation such as loading, implantation and the recovery that realizes the implant. In the case of the implant as a valve stent, the operation of the implant can be divided into the following stages:

firstly, loading a valve stent: before loading, the fixing piece is driven by the gear transmission mechanism to drive the outer tube to retract quickly (in a first direction), so that the inner tube assembly is exposed quickly, the valve stent is loaded on the inner tube assembly of the conveying system quickly in the following process, and the loading efficiency is improved; then, after the valve stent is arranged on the inner tube assembly, the fixing piece is driven by the gear transmission mechanism to drive the outer tube to advance slowly (in a second direction), so that the valve stent is pressed between the outer tube and the inner tube assembly, and the success rate of loading is ensured;

second, release of the valve stent: in the implantation process, the gear transmission mechanism drives the fixing piece to drive the outer tube to retract slowly (in the first direction), so that the inner tube assembly is slowly exposed, the slow release of the valve stent is realized, the implantation position of the valve stent is accurately positioned, and the accuracy of position positioning is ensured;

thirdly, recovering the valve stent: in the implantation process, if the positioning of the valve stent is found to be inaccurate, the valve stent needs to be timely recovered and repositioned, and at the moment, the fixing piece is driven to advance rapidly by the gear transmission mechanism (in the second direction), so that the valve stent is rapidly recovered into the outer tube, the recovery efficiency is improved, and the operation time is shortened.

Obviously, in above-mentioned operation, the utility model discloses a driving handle can be according to the actual operation needs to the motion of different speed control outer tubes, the better control valve support's of the doctor of being convenient for like this load, implant and retrieve etc. thereby improve the success rate of operation, reduce the operation degree of difficulty, and improve operation efficiency.

The following description refers to the accompanying drawings.

Referring to fig. 1 to 5, fig. 1 is a schematic view of a delivery system for delivering an implant according to an embodiment of the present invention, figure 2a is a perspective view of a drive handle for delivering an implant according to one embodiment of the present invention, figure 2b is a front view of a drive handle for delivering an implant according to one embodiment of the present invention, figures 2c and 2d are axial cross-sectional views of a drive handle for implant delivery according to an embodiment of the present invention, figure 3a is a partial schematic view of a drive handle for delivering an implant according to one embodiment of the present invention, figure 3b is a partial cross-sectional view of a drive handle for delivering an implant according to one embodiment of the present invention, figure 4 is a schematic view of the connection of the driving handle for delivering the implant to the outer tube according to an embodiment of the present invention, fig. 5 is a schematic view of a valve stent loaded between an inner tube and an outer tube according to an embodiment of the present invention.

As shown in FIG. 1, a delivery system for delivering an implant includes an actuating handle 10 and a catheter assembly 20, the catheter assembly 20 including an outer tube 11 and an inner tube assembly 12. Wherein the outer tube 11 is arranged outside the inner tube assembly 12 and is held coaxially with the inner tube assembly 12 and the outer tube 11 is axially movable relative to the inner tube assembly 12, wherein, in order to ensure positioning accuracy, the outer tube 11 is preferably held stationary (i.e. without circumferential movement) in the circumferential direction relative to the inner tube assembly. In practical application, the catheter assembly 20 is assembled with the driving handle 10, and the outer tube 11 is connected with the movable part on the driving handle 10, so that the movable part drives the outer tube 11 to move axially relative to the inner tube assembly 12, thereby realizing the forward and backward movement of the outer tube 11. In addition, the implant is intended to be secured to the inner tube assembly 12, and the inner tube assembly 12 needs to be connected to a stationary component on the drive handle 10 to ensure that the inner tube assembly 12 remains stationary during operation. "forward" herein refers to the direction of movement toward the distal end of the drive handle 10; "withdraw" is the opposite direction to "advance", i.e., toward the proximal end of the drive handle 10.

As shown in fig. 2a to 2d, the driving handle 10 specifically includes a housing 1, a first driving mechanism 2, a gear transmission mechanism 3, and a fixing member 4. The gear transmission 3 comprises an input section and an output section, the output section being adapted to be driven in rotation by the input section.

The first driving mechanism 2 is connected with the input section to drive the input section to rotate, and then the input section drives the output section to rotate. Optionally, the first driving mechanism 2 is disposed outside the housing 1, and preferably, the first driving mechanism 2 is a manual driving mechanism, so that an operator can adjust the rotation speed of the input section of the gear transmission mechanism 3 quickly and accurately, and the operation is more convenient. When the first driving mechanism 2 is selected as a manual driving mechanism, the manual driving mechanism preferably comprises a knob 21 arranged outside the housing 1, the knob 21 is connected with the input section, and the input section can be driven to rotate by manually rotating the knob 21.

The gear transmission mechanism 3 is arranged inside the shell 1, and meanwhile, the output section is connected with the fixing piece 4, so that the output section directly drives the fixing piece 4 to move along the axis of the driving handle 10. In order to shorten the entire length of the drive handle 10, it is preferable that at least a part of the fixing member 4 is movably disposed inside the housing 1 and connected to the output section, and it is more preferable that the moving direction of the fixing member 4 is the axial direction of the output section so that the fixing member 4 moves along the axial direction of the output section. Preferably, the fixing member 4 and the housing 1 are kept relatively stationary in the circumferential direction, so as to improve the positioning accuracy of the implant, and in practical application, the fixing member 4 is used to connect with the outer tube 11, so that the outer tube 11 is directly driven by the fixing member 4 to move along the axis of the driving handle 10.

Furthermore, in order to realize the slow and fast movement of the outer tube 11, the gear transmission mechanism 3 is configured to output a plurality of transmission ratios, when the gear transmission mechanism 3 outputs one of the transmission ratios, the fixing member 4 can be driven to drive the outer tube 11 to move along the axis of the driving handle 10 at a certain speed (size), and when the gear transmission mechanism 3 outputs other transmission ratios, the fixing member 4 can be driven to drive the outer tube 11 to move along the axis of the driving handle 10 at other speeds (sizes), so that the moving speed of the outer tube 11 can be adjusted by changing the transmission ratio output by the gear transmission mechanism 3, thereby realizing multi-stage speed regulation of the outer tube 11 during loading, releasing and recovering the implant, which facilitates the operator to freely select the fast and slow movement according to the surgical needs, realizing more efficient surgical operation, and also facilitating more precise positioning control of the implant, the operation difficulty is reduced.

The structure and operation of the drive handle 10 will be further described.

In the embodiment of the utility model, the input section specifically includes driving shaft 31 and action wheel 32, the fixed cover of action wheel 32 is established on driving shaft 31, simultaneously driving shaft 31 and 2 fixed connection of a drive mechanism, for example partly stretch out casing 1 and knob 21 connection of driving shaft 31, just driving shaft 31 can be for the activity of casing 1 (including rotation and axial displacement). Here, the driving shaft 31 may be coupled with the knob 21 by a key groove, a screw, glue, etc., and the driving wheel 32 may be coupled with the driving shaft 31 by a key groove, with the driving wheel 32 being kept stationary with respect to the driving shaft 31.

In addition, the output section specifically includes a driven shaft 33 and a driven wheel 34, the driven wheel 34 is fixedly sleeved on the driven shaft 33, the connection mode of the driven wheel 34 and the driven shaft 33 can also be selected as a key slot, and the driven wheel 34 is kept static relative to the driven shaft 34. In addition, driven shaft 33 is connected with mounting 4, and the rotary motion of driven shaft 33 can convert the linear motion of mounting 4 into, for example, driven shaft 33 and mounting 4 accessible rack and pinion realize the transmission and are connected, perhaps driven shaft 33 and mounting 4 realize the transmission through the lead screw and be connected, but actually is not limited to this, the utility model discloses do not limit to this. Thus, the transmission of motion is accomplished by the drive pulley 32 engaging the driven pulley 34, and the drive pulley 32 and the driven pulley 34 are configured to have a plurality of gear ratios. In the embodiment of the present invention, the driving wheel 32 can be one or more, and the driven wheel 34 can also be one or more, when the driving wheel 32 is one, the driven wheel 34 is multiple, and when the driven wheel 34 is one, the driving wheel 32 is multiple.

In some embodiments, there is at least one driving wheel 32, there are a plurality of driven wheels 34, all the driven wheels 34 are fixedly sleeved on the driven shaft 33 and coaxially arranged, and the driving wheel 32 is configured to selectively engage with one of the driven wheels 34, so as to output different transmission ratios when engaging with different driven wheels 34, where the transmission ratios are different from each other, and finally, the speeds (magnitudes) output by the driven shaft 33 are different from each other.

In other embodiments, there may be at least one driven wheel 34, there are a plurality of driving wheels 32, all the driving wheels 32 are fixedly sleeved on the driving shaft 31 and are coaxially arranged, and the driven wheel 34 is used for selectively engaging with one of the driving wheels 32, and for the same reason, different transmission ratios are output when engaging with different driving wheels 32, and these transmission ratios are also different from each other, so that the speeds (magnitudes) output by the driven shaft 33 are also different from each other.

In the embodiment of the present invention, referring to fig. 1, and shown in fig. 2c and fig. 2d, and fig. 3a and fig. 3b, the driving wheel 32 and the driven wheel 34 can be selected as a plurality of wheels, and the number of the driving wheel 32 is the same as the number of the driven wheels 34, so that each driving wheel 32 is used for being meshed with a corresponding one of the driven wheels 34. For example, the two driving wheels 32 and the two driven wheels 34 are respectively a first driving wheel 321, a second driving wheel 322, a first driven wheel 341 and a second driven wheel 342, the first driving wheel 321 and the second driving wheel 322 are fixedly sleeved on the driving shaft 31, the first driven wheel 341 and the second driven wheel 342 are fixedly sleeved on the driven shaft 33, and preferably, the driven shaft 33 is arranged in parallel with the driving shaft 31. Optionally, the first driving wheel 321 and the second driving wheel 322 are arranged in sequence from the near side to the far side, while the first driven wheel 341 and the second driven wheel 342 are also sequentially arranged from the near side to the far side, and the first driving pulley 321 is used for engaging with the first driven pulley 341 to realize a first transmission ratio, the second driving wheel 322 is engaged with the second driven wheel 342 to realize a second transmission ratio, the first transmission ratio is different from the second transmission ratio, the first transmission ratio can be larger or smaller than the second transmission ratio, the utility model is not limited, as long as the transmission ratios are different, the output speed of the gear transmission mechanism 3 is different, when the first driving wheel 321 is engaged with the first driven wheel 341, the second driving wheel 322 and the second driven wheel 342 are in a non-engaged state, whereas when the second driving wheel 322 is engaged with the second driven wheel 342, the first driving wheel 321 and the first driven wheel 341 are in a non-engaged state.

Further, the first transmission ratio may be 1, and in this case, the second transmission ratio may be greater than 1 (speed reduction is achieved) or smaller than 1 (speed increase is achieved). Likewise, the second transmission ratio may be 1, while the first transmission ratio may be greater than 1 (to achieve deceleration) or less than 1 (to achieve speed increase). In short, the first transmission ratio can realize the speed invariance or speed reduction or speed increase of the output, and the second transmission ratio can also realize the speed invariance or speed reduction or speed increase of the output, but the first transmission ratio is different from the second transmission ratio. Of course, the utility model discloses it is only two not to limit the action wheel and follow the driving wheel, and specific quantity can dispose according to actual operation needs. Furthermore, the utility model discloses to the position that a plurality of action wheels were arranged on the driving shaft to and also do not do specific restriction from the position that the driving wheel arranged on the driven shaft, position between a plurality of action wheels can be changed, and is same, and a plurality of position from between the driving wheel also can be changed.

Further in the embodiment of the present invention, the number of teeth of the first driving wheel 321 is Z1, the number of teeth of the second driving wheel 322 is Z2, the number of teeth of the first driven wheel 341 is Z3, the number of teeth of the second driven wheel 342 is Z4, the first transmission ratio i1 ═ Z3/Z1, the second transmission ratio i2 ═ Z4/Z2, and i2 ≠ i 1. In addition, when there are one driving wheel 32 and a plurality of driven wheels 34, the tooth number ratio of the driving wheel to each driven wheel can be increased from near to far or from far to near; alternatively, when there are one driven wheel 34 and a plurality of driving wheels 32, the ratio of the number of teeth of each driving wheel to that of the driven wheel can be sequentially increased from near to far or from far to near; or when the number of the driving wheels and the driven wheels is multiple, the number of teeth of the driving wheels and the driven wheels can be sequentially increased; the speed regulation is realized sequentially from near to far or from far to near by the configuration.

Further, the driving handle 10 further includes a second driving mechanism 5, and the second driving mechanism 5 is disposed on the housing 1 and is configured to adjust a transmission ratio of the gear transmission mechanism 3, so that the gear transmission mechanism 3 outputs one of a plurality of transmission ratios. Optionally, the second driving mechanism 5 includes a shifting fork 51, the shifting fork 51 is movably disposed on the housing 1, but the specific position is not limited in the present invention. The shift fork 51 is used for driving the driving shaft 31 to move axially, so that a corresponding driving wheel 32 on the driving shaft 31 is engaged with a corresponding driven wheel 34, thereby defining a transmission ratio. Preferably, the shift fork 51 is further used for defining a plurality of axial positions of the driving shaft 31 relative to the housing 1, the plurality of axial positions correspond to a plurality of transmission ratios, and when the shift fork 51 drives the driving shaft 31 to move to one of the plurality of axial positions, the gear transmission mechanism 5 is defined to output one of the plurality of transmission ratios, so that for an operator, the current optimal transmission ratio can be determined according to the axial position of the driving shaft 31 more clearly, and the speed of the outer pipe can be controlled more precisely.

In the embodiment of the present invention, a portion of the shift fork 51 is disposed inside the housing 1 for driving the driving shaft 31 to move, and another portion is disposed outside the housing 1 and driven by an external force. In some embodiments, the fork 51 is connected to the axle shaft 31 and is configured to drive the axle shaft 31 to move axially. In some embodiments, the shift fork 51 may not be connected to the driving shaft 31, and the driving shaft 31 may be driven to move by pushing the driving wheels 32 on the driving shaft 31, specifically, the structure of the shift fork 51 located inside the housing is disposed between the driving wheels 32, and the driving shaft 31 may be driven to move in a specific direction by pushing one driving wheel 32 adjacent to the shift fork, for example, pushing the left driving wheel 32 adjacent to the shift fork may drive the driving shaft 31 to move along the proximal end of the driving handle, and if the right driving wheel 32 is pushed, the driving shaft 32 may be driven to move along the distal end of the driving handle, and the shift fork 51 is disposed between the driving wheels 32, the axial play of the driving shaft 31. When the fork 51 is located between the driving wheels 32, the fork 51 may be disposed on a surface of the housing parallel to the driving shaft 31; alternatively, when the fork 51 is directly connected to the driving shaft 31, it may be disposed on a surface of the housing parallel to the driving shaft 31 or a surface of the housing perpendicular to the driving shaft; specifically, the utility model discloses do not require the position of shift fork 51 on the casing.

Furthermore, the shift fork 51 has a plurality of moving positions corresponding to the axial positions of the driving shaft 31, and when the shift fork 51 is driven to one of the moving positions by an external force, the driving shaft 31 is defined to be at one of the axial positions. The shift position is in the present invention, which is disposed on the housing 1, and is preferably a groove. As shown in fig. 3b, a plurality of grooves, such as a proximal groove 111 and a distal groove 112, may be formed on the housing 1, such that when the fork 51 moves from the proximal groove 111 to the distal groove 112, the first driver 321 and the first follower 341 may be changed from the engaged state to the disengaged state, and the second driver 322 and the second follower 342 may be changed from the disengaged state to the engaged state, whereas when the fork 51 moves from the distal groove 112 to the proximal groove 111, the first driver 321 and the first follower 341 may be changed from the disengaged state to the engaged state, and the second driver 322 and the second follower 342 may be changed from the engaged state to the disengaged state.

In the embodiment of the present invention, the fixing member 4 and the driven shaft 33 are preferably connected by a screw pair, and the screw pair can be connected by a screw thread or a ball screw. For example, as shown in fig. 2c and 2d, the fixed part 4 and the driven shaft 33 are in transmission connection through thread fit, specifically, one of the fixed part 4 and the driven shaft 33 is provided with an internal thread, the other of the fixed part 4 and the driven shaft 33 is provided with an external thread matched with the internal thread, optionally, the fixed part 4 is provided with an internal thread, and the driven shaft 33 is provided with an external thread. The thread on the fixing member 4 is provided along the entire circumference of the fixing member 4, or the thread on the fixing member 4 may be provided along a circumferential portion of the fixing member 4, which can reduce the cost.

More specifically, the driven shaft 33 optionally includes a first connecting section 331 and a second connecting section 332, the first connecting section 331 is used for connecting the driven wheel 34, and the first connecting section 331 is optionally a stepped shaft and can be sleeved with driven wheels with different inner holes. Meanwhile, the outer surface of the second connecting section 332 is provided with an external thread, and correspondingly, the fixing member 4 is provided with a connecting hole for accommodating the second connecting section 332, and the connecting hole is provided with an internal thread. Optionally, the fixing member 4 includes a first connecting portion 41 and a second connecting portion 42, the first connecting portion 41 is provided with the connecting hole, the connecting hole may penetrate through the fixing member 4 or may not penetrate through the fixing member 4, in addition, the second connecting portion 42 is used for connecting with the outer tube 11, a connection manner between the outer tube 11 and the second connecting portion 42 is not particularly limited, for example, the connecting hole may be connected with a distal end of the second connecting portion 42, or penetrate through the second connecting portion 42 and be connected therewith (see fig. 4). For example, the second connecting portion 42 is provided with an inner cavity through which the connecting hole passes, and a portion of the outer tube 11 is inserted into and connected to the inner cavity, and optionally, the diameter of the inner cavity is smaller than the connecting hole.

Thus, the actuation handle 10 can be operated in the preferred manner as described below, with reference to figures 1-5, and with the implant being illustrated as a valve holder 30.

Preoperative loading of the valve stent 30: firstly, the shifting fork 51 is shifted to the near-end groove 111, so that the first driving wheel 321 is meshed with the first driven wheel 341; then, the knob 21 is turned to make the fixing member 4 drive the outer tube 11 to be quickly withdrawn towards the proximal end of the driving handle 10, so as to quickly load the valve stent 30 on the inner tube assembly 12; thereafter, the shift fork 51 is shifted to the distal end recess 112 again, so that the second driving wheel 322 is engaged with the second driven wheel 342, and the knob 21 is rotated in the opposite direction, so that the fixing member 4 drives the outer tube 11 to advance slowly toward the distal end of the driving handle 10, thereby crimping the valve holder 30 in the outer tube 11 at a slower speed. During the implantation of the valve holder 30, the fork 51 is first moved to the distal recess 112, and the knob 21 is further rotated, so that the fixing member 4 drives the outer tube 11 to be slowly withdrawn toward the proximal end of the driving handle 10, so as to slowly release the valve holder 30 in the body. In the process of recovering the valve stent 30, the shifting fork 51 is shifted to the proximal groove 111, and then the knob 21 is rotated, so that the fixing member 4 drives the outer tube 11 to advance rapidly towards the distal end of the driving handle 10, thereby rapidly recovering the valve stent 30.

As shown in fig. 5, the inner tube assembly 12 specifically includes, from the proximal end to the distal end, an inner tube 123, a fixed head 122, and a tapered head 121 connected in series. Taking the implant as the valve stent 30 as an example, fig. 5 shows the valve stent 30 in an unreleased state, as can be clearly understood from fig. 5, the valve stent 30 is loaded on the periphery of the inner tube 123 between the tapered head 121 and the fixed head 122 during delivery, and is fixedly supported by the fixed head 122 (one end of the valve stent 30 is fixed on the fixed head 122), while the fixed head 122 is not movable (i.e. all degrees of freedom are limited), and the proximal end of the inner tube 123 is fixedly connected with the housing 1 by threads or glue, so that the whole inner tube 123 is fixed relative to the housing 1, thereby ensuring that the valve stent 30 loaded on the fixed head 122 is kept relatively fixed with the driving handle 10. As shown in fig. 1, in one embodiment, the inner tube 123 is connected to the housing 1 after passing through the driven shaft 33, that is, a through hole is provided inside the driven shaft 33, and the inner tube 123 is connected to the proximal end of the housing 1 through the through hole. However, in other embodiments, the inner tube 123 may be connected to the housing 1 without passing through the driven shaft 33, for example, the outer tube 11 may be arranged eccentrically to the driven shaft 33, such that the proximal end of the inner tube 123 may extend out of the outer tube 11 and be connected to the housing 1 outside the driven shaft 33, which may prevent the driven shaft 33 from being affected by saline, for example, introduced into the inner tube 123, and may cause rusting of the driven shaft 33, and the inner tube 123 may be arranged outside the driven shaft 33, compared to the inner tube 123 passing through the driven shaft 33, to facilitate the assembly and disassembly of the inner tube 123. In addition, the distal end of the outer tube 11 is fitted over the outer periphery of the valve holder 30 loaded on the inner tube 123, and preferably, the distal end of the outer tube 11 contacts the proximal end face of the tapered head 121 at the distal end of the inner tube 123. The outer tube 11 can be driven to move back and forth by manual driving, so that the outer tube 11 can move back and forth relative to the inner tube assembly 12, and loading, releasing, recovering and the like of the valve stent 30 can be realized.

More specifically, the process of loading, releasing and retrieving the valve stent 30 is:

first, loading of the valve stent 30: the rotation of the knob 21 causes the outer tube 11 to retreat rapidly so that the portion of the inner tube 123 between the fixing head 122 and the tapered head 121 is exposed to the outside, thereby loading the valve-stent 30 onto the inner tube 123; the next is crimping of the valve stent 30: after the valve stent 30 is loaded, the knob 21 is rotated to advance the outer tube 11 at a slow speed, so that the valve stent 30 can be pressed and held in the outer tube 11; in turn, for release of the valve stent 30: in the implantation process, the knob 51 is rotated to slowly retract the outer tube 11, so that the valve stent 30 is slowly released by withdrawing the outer tube 11; further for the retrieval of the valve stent 30: if the valve stent 30 is not accurately positioned in the implantation process, the valve stent 30 can be retracted into the outer tube 11 again, so that the knob 21 can be rotated again, the outer tube 11 is only rapidly advanced by the rotation of the knob 21, and the valve stent 30 is rapidly recovered by the rapid advancement of the outer tube 11.

Therefore, in different stages of the operation, different operation requirements can be conveniently met by adjusting the advancing speed of the driving handle 10 according to the operation requirements, so that the operation efficiency is improved, the operation difficulty is reduced, the positioning precision of the valve stent is improved, and a better treatment effect is achieved.

It should be noted that the embodiments of the present invention are described with reference to a valve stent (e.g., a heart valve stent) as an implant. It will be appreciated by those skilled in the art that the delivery system of the present disclosure may be used to place other implants (e.g., vascular stents) into corresponding locations in the body in addition to valve stents.

Furthermore, the driving shaft and the driven shaft that relate to in the utility model are circular shaft on the whole, the preferred hollow pipe of mounting to the driven shaft inserts the mounting and realizes the vice connection of spiral. In addition, on the driving shaft, the diameter of the driving wheel can be large or small, the gear wheel on the driving shaft can be meshed with the pinion on the driven shaft, the pinion on the driving shaft can also be meshed with the gear wheel on the driven shaft, the transmission ratio is large, the rotary circle of the knob can be rotated to have large displacement and speed, the rapid movement can be conveniently realized, the transmission ratio is small, the rotary circle of the knob can be rotated to have small speed and displacement, the slow movement can be conveniently realized, meanwhile, the linear displacement precision of the fixing piece is converted by the rotary n degrees of the knob, and more accurate positioning control can be realized. The embodiment of the utility model provides an in, drive ratio can be great and realize the quick motion of outer tube when the pinion on driving shaft and the driven shaft mesh mutually to improve operation efficiency, and drive ratio can be less and realize the slow motion of outer tube when the pinion on the driving shaft meshes mutually with the gear wheel on the driven shaft, the displacement control precision is high, and the operator realizes accurate operation more easily, reduces the operation degree of difficulty.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modification and modification made by those skilled in the art according to the above disclosure are all within the scope of the claims.

Claims (15)

1. A drive handle for delivering an implant, comprising: the device comprises a shell, a fixing piece, a gear transmission mechanism and a first driving mechanism; the gear transmission mechanism is arranged in the shell and comprises an input section and an output section, the input section is connected with the first driving mechanism, and the output section is connected with the fixing piece and is used for being driven by the input section to rotate;

wherein: the first driving mechanism is used for driving the gear transmission mechanism to drive the fixing piece to move along the axis of the driving handle, and the gear transmission mechanism is used for outputting a plurality of transmission ratios and selectively driving the fixing piece to move through one of the transmission ratios.

2. The drive handle for delivering an implant according to claim 1, wherein the input section comprises a drive shaft and a drive wheel, the drive wheel being disposed on the drive shaft, and the drive shaft being connected to the first drive mechanism; meanwhile, the output section comprises a driven shaft and a driven wheel, the driven wheel is arranged on the driven shaft, the driven shaft is connected with the fixing piece, and the rotary motion of the driven shaft is converted into the movement of the fixing piece along the axial direction of the driving handle;

wherein: the number of the driving wheels is at least one, the number of the driven wheels is multiple, and the at least one driving wheel is used for being selectively meshed with one of the driven wheels so that the gear transmission mechanism can output multiple transmission ratios; or, the number of the driven wheels is at least one, the number of the driving wheels is multiple, and the at least one driven wheel is used for being selectively meshed with one of the driving wheels so that the gear transmission mechanism can output multiple transmission ratios.

3. The drive handle for delivering an implant according to claim 2, wherein the driving wheels and the driven wheels are each provided in plurality, and the number of the driving wheels corresponds to the number of the driven wheels, while each of the driving wheels is adapted to engage with a corresponding one of the driven wheels.

4. The driving handle for delivering an implant according to claim 2, wherein the driving shaft is disposed in parallel with the driven shaft, and the direction of movement of the fixing member is the axial direction of the driven shaft, while the fixing member is coupled with the driven shaft in a screw pair.

5. The drive handle for delivering an implant according to any of claims 1-4, wherein the first drive mechanism is a manual drive mechanism.

6. The drive handle for delivering an implant of claim 5, wherein the manual drive mechanism includes a knob disposed outside of the housing and coupled to the input section.

7. The drive handle for delivering an implant according to any of claims 2-4, wherein the drive handle further comprises:

the second driving mechanism is arranged on the shell and used for adjusting the transmission ratio of the gear transmission mechanism so that the gear transmission mechanism outputs one of the transmission ratios.

8. The drive handle for delivering an implant according to claim 7, wherein the second driving mechanism includes a fork movably disposed on the housing for driving the driving shaft to move axially to engage a corresponding one of the driving wheels on the driving shaft with a corresponding one of the driven wheels on the driven shaft, thereby defining the gear train to output one of the plurality of gear ratios.

9. The drive handle for delivering an implant of claim 8, wherein the fork has a plurality of shift positions relative to the housing, and wherein the plurality of shift positions correspond one-to-one to the plurality of gear ratios; when the shifting fork is driven by external force to move to one of the plurality of moving positions, the gear transmission mechanism is limited to output one of the plurality of transmission ratios.

10. The driving handle for delivering an implant according to claim 8, wherein a portion of the fork is disposed outside the housing, and another portion of the fork extends into the housing and is connected to the driving shaft; alternatively, the first and second electrodes may be,

one part of the shifting fork is arranged outside the shell, and the other part of the shifting fork extends into the shell and is used for driving the driving shaft to move through the driving wheel.

11. The drive handle for delivering an implant according to any of claims 1-4, wherein the fixation member remains circumferentially stationary relative to the housing and at least a portion of the fixation member is movably disposed in the housing.

12. A delivery system for delivering an implant, comprising a drive handle for delivering an implant according to any of claims 1-11, and further comprising an outer tube and an inner tube assembly;

the inner tube assembly is arranged in the outer tube in a penetrating mode and used for fixing the implant and is kept static relative to the shell; the outer tube is connected with the fixing piece of the driving handle, and the fixing piece is used for driving the outer tube to move axially relative to the inner tube assembly.

13. The delivery system for delivering an implant according to claim 12, wherein a portion of the outer tube is inserted into and coupled to the anchor.

14. The delivery system for delivering an implant according to claim 12, wherein the inner tube assembly is coupled to the housing after passing through the output section of the gear train.

15. The delivery system for delivering an implant according to claim 12, wherein the inner tube assembly is disposed outside of the gear assembly and is coupled to the housing.