WO2022213906A1

WO2022213906A1 - Conveying system for conveying implant

Info

Publication number: WO2022213906A1
Application number: PCT/CN2022/084932
Authority: WO
Inventors: 梅杰; 吴旭闻; 桂宝珠; 陈国明
Original assignee: 上海微创心通医疗科技有限公司
Priority date: 2021-04-06
Filing date: 2022-04-01
Publication date: 2022-10-13
Also published as: CN115177417A; ES2956249A2

Abstract

A conveying system for conveying an implant, the system comprising a conveying assembly (1) and a driving assembly (2), which are sequentially connected to each other. The driving assembly (2) and the conveying assembly (1) are arranged separate from one another. The conveying assembly (1) comprises a movable pipe (120), a fixed pipe (110) and a pressure component (130), wherein the movable pipe (120) and the fixed pipe (110) can move relative to each other; the pressure component (130) is arranged at a proximal end of the conveying assembly (1); a movable member (150) of the pressure component (130) is movably arranged in a sealed cavity; and the movable pipe (120) is connected to the movable member (150). The driving assembly (2) is used for conveying a medium to a release cavity (131) in the sealed cavity, so as to drive the movable member (150) to move in a first direction, thereby achieving the release of an implant; and the driving assembly (2) is further used for conveying a medium to a closed cavity (132) in the sealed cavity, so as to drive the movable member (150) to move in a second direction, thereby achieving loading of the implant. By means of the conveying system, the safety of an instrument is improved, and the conveying control precision is also improved.

Description

Delivery system for delivering implants

technical field

The present invention relates to the technical field of medical devices, in particular to a delivery system for delivering implants.

Background technique

Transcatheter vascular stent implantation is a commonly used treatment plan for minimally invasive cardiovascular diseases in recent years. . In heart valve diseases, transcatheter vascular stent implantation avoids the huge trauma of cardiac arrest after thoracotomy after conventional surgical treatment.

This technology requires the stent to be operated by a doctor, and the stent can be released accurately and stably in the proper position of the stent. The commonly used delivery system is driven by a mechanical structure, so the operating handle has a large mass and volume, which cannot be operated as freely as commonly used surgical tools, and the doctor's control accuracy of the delivery system is also low. At the same time, the traditional mechanical structure The operation of the transmission system of the transmission is more complicated, which indirectly increases the operation time and directly affects the operation results. In addition, the pushing force provided by the traditional delivery system cannot be compatible with various stents, and the flexibility is low.

In addition, in the existing hydraulic delivery system, the hydraulic chamber is generally arranged in the conduit part of the delivery system, even directly connected with the chamber of the coating stent. Since the catheter part, especially the distal end of the catheter, needs to be transported into the patient, there are certain safety hazards in this setting. For example, when the hydraulic chamber leaks, on the one hand, it will affect the doctor's judgment on the release accuracy of the implant, on the other hand Aspects may also cause fluid to leak into the patient. In addition, the conveying catheter in the traditional hydraulic conveying system needs at least part of the catheter (such as moving pipe) to be directly connected with the driving mechanism (handle). During the conveying process, the driving mechanism needs to move together. At this time, the quality of the conveying handle is large, The delivery control accuracy is reduced, and the excessive load also affects the operation of the doctor and reduces the success rate of the operation.

Therefore, there is a need for a conveying system with simple operation, high control precision, light use, good flexibility and good safety.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a delivery system for delivering implants. By arranging a pressure member at the proximal end of the delivery assembly, the safety of the instrument is improved, and in particular, the quality of the delivery assembly is reduced and the delivery is improved. The control precision improves the success rate of the operation.

To achieve the above object, a delivery system for delivering implants provided by the present invention includes a connected delivery assembly and a drive assembly; the drive assembly and the delivery assembly are provided separately;

The conveying assembly includes a moving pipe, a fixed pipe and a pressure part; the fixed pipe and the moving pipe can move relative to each other;

The pressure member is disposed at the proximal end of the delivery assembly and includes a sealed cavity and a moving piece; the moving piece is movably disposed in the sealed cavity and divides the sealed cavity into an axial arrangement the release cavity and the closed cavity; the moving tube is connected with the moving part;

The driving component is used for delivering the medium to the release chamber to drive the moving member to move in the first direction, and the driving component is also used for delivering the medium to the closed chamber to drive the moving member to the second direction The direction moves to realize the relative movement of the fixed pipe and the moving pipe.

Optionally, the drive assembly includes a drive mechanism, and the drive mechanism includes a motor assembly and a hydraulic cylinder assembly; the motor assembly is used to drive the hydraulic cylinder assembly to convey a medium.

Optionally, the hydraulic cylinder assembly includes a hydraulic cylinder block and a piston, the piston divides the space in the hydraulic cylinder into a release drive chamber and a closed drive chamber; the release drive chamber has a first outlet, and the closed drive chamber the drive chamber has a second outlet;

The motor assembly is used for driving the piston to move in a third direction, so that the medium in the release driving chamber flows out through the first outlet and flows into the release cavity through the conduit; the motor assembly is used for driving the piston Movement in the fourth direction causes the medium in the closed drive chamber to flow out through the second outlet and into the closed cavity through the conduit.

Optionally, the driving assembly further includes a control box, and the driving mechanism is arranged in the control box.

Optionally, the motor assembly includes a rotary motor, the driving mechanism further includes a motion conversion mechanism, and the rotary motion of the rotary motor is converted into linear motion by the motion conversion mechanism; or, the motor assembly includes a linear motor.

Optionally, the drive assembly further includes an emergency stop button for cutting off the power supply of the motor assembly.

Optionally, the drive assembly further includes a control box bracket, and the control box is arranged on the control box bracket.

Optionally, the pressure component further includes a casing, and the sealed cavity is provided in the casing; or, the pressure component further includes a casing, and the casing includes a first casing and a second casing , the second casing is arranged in the first casing, and the sealed cavity is arranged in the second casing;

The casing is provided with a first joint and a second joint; the first joint is detachably connected to one end of one of the high-pressure pipes; the second joint is detachably connected to one end of the other high-pressure pipe ;

The control box is provided with a first interface and a second interface, the first interface is detachably connected to the other end of one of the high-pressure pipes, and the second interface is connected to the other end of the other high-pressure pipe. The other end is detachably attached.

Optionally, the conveying system further includes a control assembly connected in communication with the driving assembly, and the control assembly is configured to control the driving assembly to convey the medium;

The control assembly is disposed separately from the conveying assembly, or the control assembly, the conveying assembly and the driving assembly are disposed separately from each other.

Optionally, when the control assembly, the driving assembly and the conveying assembly are provided separately from each other, the control assembly is configured as a portable device.

Optionally, the portable device is provided with a control button and a communication interface; the communication interface is wired or wirelessly connected to the drive assembly; the control button has a first position and a second position;

When the control button is at the first position, the control assembly releases a first signal to the drive assembly, so that the drive assembly delivers the medium to the release cavity;

When the control button is in the second position, the control assembly releases a second signal to the drive assembly to cause the drive assembly to deliver medium to the closed cavity.

Optionally, the driving component includes a human-computer interface for inputting information; the information includes at least one of a moving speed, a moving stroke and a medium pressure of the moving tube.

Optionally, the pressure member further includes a first sealing member, a second sealing member and a third sealing member, and the second sealing member and the third sealing member are respectively provided at both ends of the sealed cavity, so The first sealing member is provided on the moving member.

Optionally, an extension tube is provided at the proximal end of the moving member, and the proximal end of the extension tube extends out of the proximal end of the sealed cavity.

Optionally, the drive assembly includes a pressure sensor for detecting the pressure of the medium leading to the release chamber or the closure chamber.

In the above-mentioned delivery system, the pressure component is arranged at the proximal end of the delivery component, which avoids setting the pressure component on the catheter portion of the delivery component, thereby avoiding the safety problem caused by the leakage of the medium cavity when the distal end of the catheter is delivered into the patient's body, Improve the safety of the device.

The above-mentioned delivery system uses the pressure provided by the medium to drive the movement of the moving tube to realize the loading and release of the implant, so that the delivery system can bear loads of different sizes, so that the delivery system can be suitable for different implants and has good flexibility.

The above-mentioned conveying system separates the drive assembly, the control assembly and the conveying assembly in space, that is, not in the same physical integration space. In doing so, the quality of the conveying assembly (ie the conveying handle) is reduced, the conveying control accuracy is improved, and the Excessive load on the delivery assembly interferes with the operator's operation, thereby increasing the success rate of the procedure

Since the above-mentioned conveying system is set independently of the conveying assembly, the mutual interference between the two is small. Therefore, when the conveying assembly is modified, for example, when a new function is given to the conveying assembly, it is less restricted by the driving assembly, thus reducing the cost of modifying the conveying assembly. Difficulty, it is beneficial to expand the function of the conveying system and improve the performance of the conveying system.

Because the control assembly and the drive assembly are spatially separated, that is, the two are not integrated into the same physical space, the above-mentioned delivery system is constructed in this way to avoid increasing the volume of the drive assembly, thereby reducing the area occupied by the area around the operating bed. space to avoid affecting the surgical operation, and it is also convenient to sterilize the control components separately, reducing the difficulty of sterilization and ensuring the safety of the operation.

The control component of the above-mentioned delivery system is especially a portable device, on the one hand, it is convenient to sterilize the control component, which further ensures the safety of the operation, and on the other hand, it has the advantages of small size and light weight, which is convenient for doctors to operate.

The above-mentioned conveying system has stable structure, high transmission efficiency, and strong ease of use, can be adapted to conveying systems of various specifications, and can significantly reduce the operation cost by replacing different executive elements.

Description of drawings

Those of ordinary skill in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention. In the attached picture:

1 is a schematic structural diagram of a conveying assembly in a conveying system in a preferred embodiment of the present invention;

2 is a schematic structural diagram of wired communication between the drive assembly and the control assembly in the conveying system in the preferred embodiment of the present invention;

Fig. 3a is an axial cross-sectional schematic view of the delivery assembly in the preferred embodiment of the present invention, wherein the delivery assembly is in a closed state;

Figure 3b is an axial cross-sectional schematic view of the delivery assembly in the preferred embodiment of the present invention, wherein the delivery assembly is in an open state;

Figure 4a is a schematic structural diagram of a control box in a drive assembly in a preferred embodiment of the present invention;

4b is a schematic structural diagram of a driving mechanism in a preferred embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a control assembly in a preferred embodiment of the present invention.

The reference numerals are explained as follows:

101-first joint; 102-second joint; 110-fixed pipe; 111-fixed part; 120-moving pipe; 130-pressure part; 131-release chamber; 1311-second sealing part; 1312 - third sealing part; 132 - closed cavity; 140 - first housing; 150 - moving part; 151 - first sealing part; 152 - extension tube; 160 - conical head; 170 - sheath tube; 301a-first interface; 301b-second interface; 302-emergency stop device; 303-human-machine interface; 304-signal input port; 305-control box bracket; 306-rotating motor; 307-transmission mechanism; 308- Linear module; 309-connection block; 310-first outlet; 311-second outlet; 312-piston; 313-hydraulic cylinder; 3-control assembly; 401-communication interface; 402-control button; 403-bump ; 4- catheter; 5- signal control line.

The same or similar reference numbers in the drawings represent the same or similar parts.

Detailed ways

In order to make the objects, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in a simplified form and are not drawn to scale, and are only used to facilitate and clearly assist the purpose of explaining 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" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the following description, "distal" and "proximal" are used for convenience of description; "distal" is the side away from the operator of the delivery system, that is, the end that enters the body first; "proximal" is close to the delivery The side of the system operator; "axial" refers to the direction along the axis of the catheter. 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 details. In other instances, some technical features known in the art have not been described in order to avoid obscuring the present invention.

The core idea of the present invention is to provide a delivery system for delivering an implant, which improves the safety of the device by arranging a medium cavity (ie, a sealed cavity) at the proximal end of the delivery assembly. In particular, this delivery system uses electric and hydraulic to drive the movement of the moving tube to realize the loading and release of implants, so that the delivery system can withstand loads of different sizes, and the pushing force provided by this can be compatible with different implants (different implants). The pushing force required by the body will be different, such as coronary stents, which require a larger pushing force), so that the delivery system can be adapted to different implants with good flexibility. In particular, separating the driving assembly from the conveying assembly reduces the quality of the conveying assembly, improves the conveying control precision, and avoids the excessive load on the conveying assembly from affecting the operation of the operator, thereby improving the success rate of the operation. Moreover, since the driving component is set independently of the conveying component, the mutual interference between the two is small. Therefore, when the conveying component is modified, for example, when a new function is given to the conveying component, the restriction of the driving component is small, thus reducing the difficulty of modifying the conveying component. It is beneficial to expand the function of the conveying system and improve the performance of the conveying system. In addition, the delivery system of the present invention is simple to operate and convenient for doctors to operate.

It should be known that the present invention does not require the type of implants to be applied, and the implants can be selected based on the location of the target delivery site. For example, the implants include but are not limited to valve stents (such as heart valve stents). ). It will be understood by those skilled in the art that, in addition to valve stents, the delivery system disclosed in the present invention can also be used for other implants (such as vascular stents, aneurysm stents, balloon-expandable stents, ureteral stents, prostate stents, and peripheral stents). , tracheobronchial stent, etc.) into the corresponding position of the body. The implant may also be a graft, embolic device, occlusion device, or the like. The present invention also does not limit the approach of the delivery system, and access to the treatment site can be provided by various techniques and methods, such as percutaneous transluminal angioplasty and the like.

The delivery system of the present invention will be further explained and described below in conjunction with the accompanying drawings and preferred embodiments.

As shown in FIG. 1 and FIG. 2 , this embodiment provides a delivery system for an implant, and the delivery system includes a delivery assembly 1 and a drive assembly 2 . Preferably, the conveying system further includes a control assembly 3, and the control assembly 3 communicates with the driving assembly 2 by wire or wirelessly. In some embodiments, the control assembly 3 is in wired communication with the drive assembly 2 via signal control lines 5 . The drive assembly 2 is not arranged on the conveying assembly 1, so that the drive assembly 2 and the conveying assembly 1 are spatially separated or separated, that is, the conveying assembly 1 and the drive assembly 2 are not integrated in the same physical space. Inside the container or not a tight connection. Further, the control assembly 3 is also not arranged on the conveying assembly 1, so that the conveying assembly 1 and the control assembly 3 are spatially separated or separated from each other, that is, the conveying assembly 1 and the control assembly 3 are not integrated in the physical space. Within the same container or not a tight connection. Further, the control assembly 3 is used to send a drive signal to the drive assembly 2, so that the drive assembly 2 works according to the drive signal and controls the working state (open state and closed state) of the delivery assembly 1, so as to realize the loading and release of the implant. , and the reset of the delivery assembly 1.

As shown in FIGS. 3 a and 3 b , the delivery assembly 1 includes a fixed tube 110 , a moving tube 120 , a pressure member 130 , a tapered head 160 and a sheath tube 170 . The pressure member 130 is provided at the proximal end of the delivery assembly 1 and includes a sealed cavity. The pressure member 130 preferably includes a first casing 140 , the first casing 140 is sleeved on the outside of the moving tube 120 , and the closed cavity is disposed in the first casing 140 . Further, a part of the fixing tube 110 penetrates into the first housing 140 , and the proximal end of the fixing tube 110 is fixedly connected with the first housing 140 . Optionally, the fixing tube 110 is fixedly connected to the first housing 140 through the fixing member 111 . Further, another part of the fixing tube 110 extends out of the first housing 140 and is connected to the conical head 160 . The fixed tube 110 and the moving tube 120 are relatively movable. The tapered head 160 is preferably a non-invasive head, such as a non-invasive structure such as a cone, part of a sphere, a circle, etc., to prevent, inhibit or substantially prevent damage to the target tissue. The tapered head 160 is used to cooperate with the sheath tube 170 to realize loading and releasing of the implant. The tapered head 160 and the fixing tube 110 can be formed separately or in one piece; the so-called "separate" molding means that after the tapered head 160 and the fixing tube 110 are processed separately, they are assembled together; the so-called "integrated" Forming refers to processing the fixing tube 110 with the tapered head 160 at one time.

The pressure part 130 further includes a moving part 150, and the moving part 150 is movably disposed in the sealed cavity. The moving member 150 divides the sealed cavity into an axially arranged release cavity 131 and a closed cavity 132, and the two cavities are sealed against each other. And the moving part 150 is connected with the moving pipe 120 . Further, the movable tube 120 is sleeved outside the fixed tube 110 , that is, the movable tube 120 is an outer tube, the fixed tube 110 is an inner tube, and the proximal end of the movable tube 120 is connected to the movable member 150 , and the distal end of the movable tube 120 After extending out of the first housing 140 , it is connected to the sheath tube 170 . In other embodiments, the fixed pipe 110 is sleeved outside the moving pipe 120 , that is, the moving pipe 120 is an inner pipe, and the fixed pipe 110 is an outer pipe. In this embodiment, as shown in FIG. 3 a , the fixed tube 110 is an inner tube, the moving tube 120 is an outer tube, and the inner tube has a through cavity to provide a passage for the guide wire.

The sheath tube 170 and the moving tube 120 may be formed separately or integrally. Similarly, the so-called "separate" molding refers to processing the sheath tube 170 and the moving tube 120 separately, and then assembling the two together; the so-called "integrated" molding refers to processing the moving tube with the sheath tube 170 at one time. 120. The present invention has no special requirements on the structure of the sheath tube 170, and those skilled in the art can use conventional structures to wrap the implant.

In actual operation, the driving component 2 is used to deliver the medium to the release cavity 131 of the delivery component 1, so as to drive the moving member 150 to move toward the proximal end (ie, the first direction) of the fixed tube 110 through the pressure of the medium, thereby driving the movement The tube 120 also moves toward the proximal end of the fixing tube 110, so that the sheath tube 170 is away from the tapered head 160, and the open state shown in FIG. 3b is obtained, at this time, the release of the implant can be realized; It is used to deliver the medium to the closed cavity 132 of the delivery assembly 1, so as to drive the moving member 150 to move to the distal end of the fixed tube 110 (ie, the second direction) by the pressure of the medium, thereby driving the moving tube 120 to the distal end of the fixed tube 110. The end is moved to bring the sheath 170 close to the tapered head 160, and finally the closed state shown in Fig. 3a is obtained, at which time the loading of the implant or the reset of the delivery system can be achieved. Additionally, the sheath 170 may encapsulate all or a portion of the implant when the implant is loaded. It should be understood that the medium is mainly a liquid that is incompressible and has good fluidity, such as pure water, physiological saline, oil, etc., preferably physiological saline.

Further, the driving signal includes a release signal (first signal) and a closing signal (second signal). When the control assembly 3 sends a release signal to the drive assembly 2, the drive assembly 2 sends the medium to the release cavity 131 of the conveying assembly 1; on the contrary, when the control assembly 3 sends a closing signal to the drive assembly 2, the The drive assembly 2 conveys the medium to the closed cavity 132 of the conveying assembly 1 .

It can be seen that the pressure member 130 in the delivery system of this embodiment is arranged at the proximal end of the delivery assembly 1, rather than at the distal end of the delivery assembly 1. In doing so, the pressure member 130 on the catheter portion of the delivery assembly 1 is avoided. Therefore, the safety problem caused by the leakage of the hydraulic chamber when the distal end of the catheter is delivered into the patient's body is avoided, thereby improving the safety of the device. Moreover, the conveying system uses hydraulic pressure to drive the moving tube 120 to move, so that the conveying system can bear loads of different sizes, that is, the provided pushing force can adapt to different implants, so that the conveying system can be applied to different implants, and the flexibility it is good. In particular, the present invention separates the drive assembly from the conveying assembly instead of integrating it, reduces the quality of the conveying assembly, avoids excessive loads on the conveying assembly from affecting the operation of the operator, thereby improving the conveying control accuracy and improving the success rate of surgery. Moreover, since the driving component is set independently of the conveying component, the mutual interference between the two is small. Therefore, when the conveying component is modified, for example, when a new function is given to the conveying component, the restriction of the driving component is small, thus reducing the difficulty of modifying the conveying component. It is beneficial to expand the function of the conveying system and improve the performance of the conveying system.

Further preferably, the control assembly 3 and the drive assembly 2 are spatially separated or provided separately instead of being integrated in the same container in a physical space. The advantage of this is that it avoids increasing the volume of the drive assembly, thereby reducing the space occupied by the area around the operating bed to avoid affecting the surgical operation, and it is also convenient to sterilize the control assembly 3 separately, reducing the difficulty of sterilization and ensuring Surgical safety. Further, the control assembly 3 is preferably a portable device. On the one hand, it is convenient to sterilize the control assembly 3 to ensure the safety of the operation.

Continuing to refer to FIG. 2 , the drive assembly 2 conveys the medium to the delivery assembly 1 through an external conduit 4, preferably, the conduit 4 is a high-pressure-resistant conduit (ie, a high-pressure tube), so as to be suitable for the delivery system to deliver different implants the goal of. In the illustrated embodiment, there are two conduits 4 , which are respectively connected to the release cavity 131 and the closing cavity 132 . In other embodiments, the number of conduits 4 may be increased or decreased. In addition, as shown in FIG. 1 , FIG. 3 a and FIG. 3 b , the first housing 140 is provided with a first joint 101 and a second joint 102 , the first joint 101 communicates with the release cavity 131 , and the second joint 101 communicates with the release cavity 131 . The joint 102 communicates with the closed cavity 132, and each joint is detachably connected to a corresponding one of the conduits 4, so that each conduit 4 is connected to the corresponding cavity through the corresponding joint. It should be known that the present invention does not limit the structure of the drive assembly 2 for conveying the medium to the conveying assembly 1. For example, in other embodiments, it can also be realized through a multi-way joint, or other suitable structures for conveying the medium to the two cavities. medium.

Further, considering that the first casing 140 is usually made of polymer material, the pressure it bears is easily limited. In order to overcome this problem, the pressure member 130 is designed to further include a second casing (not marked) , the second shell is set in the first shell 140, the sealing cavity is set in the second shell, and the material of the second shell is a metal material with good biocompatibility, so that the sealing cavity is The cavity can withstand greater pressure, which further improves the delivery capacity of the delivery system to adapt to deliver different implants.

As shown in Fig. 3a and Fig. 3b, in order to improve the sealing performance, the pressure member 130 preferably further includes a first sealing member 151, a second sealing member 1311 and a third sealing member 1312, the first sealing member 151 is arranged in the moving A second sealing part 1311 and a third sealing part 1312 are respectively provided on both ends of the sealed cavity. Under the action of the three sealing components, the sealing performance of the releasing cavity 131 and the closing cavity 132 is ensured, and the safety and accuracy of the conveying assembly 1 are further improved. In some embodiments, the first sealing member 151, the second sealing member 1311 and the third sealing member 1321 are sealing rings, and the structure and material of each sealing member are not limited by the present invention. Each sealing member may be made in whole or in part from silicone, rubber, polymer, elastomer, combinations thereof, or other compliant material suitable for forming a seal. In some embodiments, either sealing member may be a gasket or an O-ring, all or part of which is made of rubber. In other embodiments, either sealing member may be a bladder seal. Other types of sealing components can be used if needed or desired.

Preferably, an extension tube 152 is further provided at the proximal end of the first sealing member 151 . When the delivery assembly 1 is in a closed state or an open state, the extension tube 152 extends out of the proximal end of the pressure member 130 (ie, extends out of the second housing), so as to improve the movement stability of the moving member 150 and further improve the delivery security and accuracy. The extension pipe 152 is integrally formed with the moving pipe 120 , or separately formed from the moving pipe 120 . Preferably, the delivery assembly 1 further includes an evacuation assembly (not shown in the figure) for evacuation of the air in the sheath tube 170 before loading the implant, that is, to achieve evacuation of the distal end of the moving tube 120 The problem is that the air in the sheath tube 170 needs to be evacuated by means of an evacuation assembly prior to surgery. Here, the emptying assembly is a conventional arrangement, so the present invention will not describe this structure in detail, and those skilled in the art can set it according to their own needs.

As shown in Fig. 4a and Fig. 4b, the drive assembly 2 further includes a drive mechanism, and further includes a control box (not marked), and the drive mechanism is arranged in the control box. The drive mechanism is used to deliver the medium to the release cavity 131 or the closed cavity 132, and further, the drive mechanism is used to deliver the medium to the release cavity 131 or the closed cavity 132 after receiving the driving signal sent by the control assembly 3. The control box is used to protect the drive mechanism. The driving mechanism includes a motor assembly and a hydraulic cylinder assembly, and the hydraulic cylinder assembly is driven to convey the medium by the driving force output by the motor assembly.

In some embodiments, the motor assembly includes a rotary motor, the driving mechanism further includes a motion conversion mechanism, the rotary motion of the rotary motor is converted into linear motion by the motion conversion mechanism, and the hydraulic cylinder is driven by the motion conversion mechanism The piston moves in . In some embodiments, the motor assembly includes a linear motor, and the movement of the piston in the pressure cylinder is driven by the linear motion of the linear motor. In the illustrated embodiment, as shown in FIG. 4b, the drive mechanism includes a rotary motor 306, a transmission mechanism 307, a linear module 308, a connection block 309 and a hydraulic cylinder assembly connected in sequence, and the transmission mechanism 307 may include A coupling and/or a reducer, the linear module 308 is a motion conversion mechanism. Optionally, the linear module is a lead screw or a timing belt. The connecting block 309 is used to connect the output end of the linear module 308 and the piston rod in the hydraulic cylinder. Thus, the rotational motion of the rotary motor 306 is transmitted to the linear module 308 through the transmission mechanism 307, and the linear module 308 converts the rotational motion into linear motion, thereby driving the piston 312 in the hydraulic cylinder assembly to move. It should be known that when the motor is a linear motor, the movable plane of the linear motor is connected with the piston rod in the hydraulic cylinder through the connection block 309 . Further, the driving mechanism may further include a reducer, so as to adjust the output power of the motor assembly through the reducer.

The hydraulic cylinder assembly specifically includes a hydraulic cylinder block 313 and a piston 312, the piston 312 is movably arranged in the hydraulic cylinder block 313, and the piston 312 divides the space in the hydraulic cylinder block 313 into a release driving chamber and a closing The drive chamber, wherein the release drive chamber has a first outlet 310 and the closed drive chamber has a second outlet 311 . The relative positional relationship between the first outlet 310 and the second outlet 311 is not limited, as long as two outlets are provided on the hydraulic cylinder 313 , one outlet is connected to the release drive chamber on one side of the piston 312 , and the other outlet is connected to the other side of the piston 312 The closed drive chamber can be connected. Optionally, the control box is provided with a first interface 301a and a second interface 301b, the second outlet 311 is connected to the second interface 301b, and the first outlet 310 is connected to the first interface 301a. The first interface 301 a is detachably connected to one end of one of the conduits 4 , and the other end of the conduit 4 is detachably connected to the first connector 101 . The second port 301b is detachably connected to one end of another conduit 4 , and the other end of the conduit 4 is detachably connected to the second connector 102 . Therefore, the medium in the release drive chamber enters the release chamber 131 through the first outlet 310, the first interface 301a, the conduit 4, and the first joint 101 in sequence; similarly, the medium in the closed drive chamber sequentially passes through the second outlet 311, the first joint 101 The second port 301b , the catheter 4 and the second joint 102 enter the closed cavity 132 .

Preferably, the drive assembly 2 further includes an emergency stop device 302 for cutting off the power supply of the motor assembly in an emergency. Further, the emergency stop device 302 is provided on the control box. Further, the emergency stop device 302 includes an emergency stop button. Further, the drive assembly 2 further includes a human-machine interface 303, which is arranged on the control box, and some information can be input through the human-machine interface, and the information can include the moving speed of the moving pipe, the moving stroke, the medium pressure, etc., The type of implant may also be included to make the drive mechanism work according to the entered information. In the illustrated embodiment, the drive mechanism communicates with the control assembly 3 by wire. At this time, a signal input port 304 can be provided on the control box, and one end of the signal control wire 5 is detachably connected to the signal input port 304. The other end of the signal control line 5 is connected to the corresponding port on the control component 3 . In other embodiments, the driving mechanism communicates with the control assembly 3 wirelessly. In this case, the signal input port 304 can be used as a signal receiving port for wireless communication. Further, the drive assembly 2 further includes a control box bracket 305 , the control box is mounted on the control box bracket 305 , so as to facilitate the arrangement of the drive assembly 2 near the operating bed through the control box bracket 305 . The control box bracket 305 is preferably equipped with wheels, which is convenient to move on the ground to adjust the position.

Further, as shown in FIG. 2 and FIG. 5 , the control assembly 3 is configured as a portable device, that is, a remote control that can be held by hand. Further, a control button 402 and a communication interface 401 are provided on the portable device, and the communication interface 401 is used for wired or wireless communication connection with the drive assembly 2 . The control button 402 has a first position and a second position; when the control button 402 is toggled to the first position, such as toggled to the left, at this time, the portable device sends a release signal, indicating that the implant needs to be released currently body; when the control button 402 is toggled to the second position, such as toggled to the right, at this time, the portable device sends a closing signal, indicating that the implant needs to be loaded or the delivery assembly 1 needs to be reset. The release signal or the closing signal is then sent to the drive assembly 2 through the communication interface 401 . Preferably, the control button 402 is provided with indication marks, such as left and right arrows, to indicate the direction of the toggle. More preferably, the control button 402 is provided with a convex point 403, so as to give the operator a tactile perception to indicate the toggle position, for example, a convex point 403 is provided on the side of the control button 402 that deviates from the middle, and the other side is deviated from the center. The side is not set, when the operator's hand senses the existence of the bump 403, it is known that a release signal or a closing signal can be issued when the position is toggled. If the operator's hand does not sense the bump 403, it is known that Toggling this position gives another drive signal.

Next, the preferred working mode of the conveying system will be further described.

Before the operation, the type of implant, the moving speed of the moving tube, the pressure of the medium and other information are set on the man-machine interface 303, and then the control button 402 is toggled to transmit the driving signal to the driving component 2, and the driving component 2 The rotary motor 306 in the middle performs forward or reverse rotary motion after receiving the driving signal, and transmits the rotary pair to the linear module 308 through the transmission mechanism 307, and the linear module 308 converts the rotary pair into linear motion, and then passes The connecting block 309 drives the piston 312 to perform linear movement in the axis direction in the hydraulic cylinder block 313 .

More specifically, when the control button 402 is toggled to the left to the first position, a release signal is sent to the drive assembly 2, and the rotary motor 306 in the drive assembly 2 performs a positive rotational motion to drive the piston 312 to the direction shown in FIG. 4b. The medium moves in the left direction (third direction) in the hydraulic cylinder block 313, and the medium in the release drive chamber of the hydraulic cylinder 313 is compressed and pushed, passes through the first outlet 310, flows through the first interface 301a, and then passes through the conduit 4 and the first port 301a. Connector 101 enters release chamber 131 . When the liquid pressure in the release cavity 131 exceeds the axial static friction between the moving member 150 and the fixed tube 110, the moving member 150 pushes the moving tube 120 to move toward the proximal end of the fixed tube 110, so that the distal end of the moving tube 120 is away from the cone The head 160, implements the release operation of the implant. After the final release is completed, as shown in FIG. 3b, the volume of the release cavity 131 reaches the maximum at this time. It should be noted here that, in order to prevent the implant from being driven to move when the implant is released, a boss (not marked) is usually provided on the fixing tube 110 to limit the movement of the implant in the proximal direction, and at the same time Cooperate with the tapered head 160 on the distal end of the fixation tube to limit the movement of the implant in the distal direction to ensure the accuracy of position release.

In addition, when the control button 402 is pushed to the right to the second position, a closing signal is sent to the drive assembly 2, and the rotary motor 306 in the drive assembly 2 performs a reverse rotation motion to drive the piston 312 to the Moving in the right direction (fourth direction), the medium in the closed driving chamber is compressed and pushed, passes through the second outlet 311 , flows through the second interface 301b , and then enters the closed cavity 132 through the conduit 4 and the second interface 102 . At this time, when the liquid pressure in the closed cavity 132 exceeds the axial static friction between the moving member 150 and the fixed tube 110, the moving member 150 pushes the moving tube 120 to move towards the distal end of the fixed tube 110, so that the distal end of the moving tube 120 is close to the cone The shape head 160 realizes the closing operation of the conveying system. When the volume of the closed cavity 132 reaches a maximum, the delivery assembly 1 returns to the closed state shown in Figure 3a.

It should be understood that the hydraulic cylinder 313 stores a medium in advance. For example, before the conduit 4 is connected to the delivery assembly 1, the medium can be pumped into the hydraulic cylinder 313 through the conduit 4 for storage. Or other suitable ways to store the medium in the hydraulic cylinder block 313 . In addition, the interfaces (such as the first interface and the second interface) connected to the conduit 4 on the control box are usually quick release interfaces, which are convenient for quick disassembly and assembly of the conduit 4, and the number of quick release interfaces is usually based on the sealing cavity in the pressure part. number to set. In addition, the number of the control buttons 402 can be one or more, if it is one, multiple positions can be set, and if there are multiple, the corresponding positions can be controlled through different control buttons 402 . In addition, the driving assembly 2 may further include a pressure sensor for detecting the pressure of the medium leading to the release chamber 131 or the closing chamber 132, such as detecting the pressure of the medium in the hydraulic cylinder 313 or in the pipeline, the monitored pressure Information can be displayed on the human-computer interface 303 . Further, the driving assembly 2 can adjust the currently delivered pressure according to the monitored pressure, so as to ensure the accuracy of the operation.

To sum up, according to the technical solutions provided by the embodiments of the present invention, the above-mentioned delivery system improves the safety of the system by arranging the hydraulic chamber at the proximal end of the delivery assembly. In addition, the above-mentioned conveying system realizes the requirement of sealing the cavity of the pressure component at each stage through three sealing components, and has a simple structure and is easier to process and manufacture. In addition, the above-mentioned delivery system adopts electric and hydraulic forms, which reduces the overall mass and volume of the actuator (ie, the delivery assembly), improves ease of use, and at the same time, the control box can be reused. Effectively reduce the cost of surgery. In addition, the delivery catheter in the traditional delivery system requires at least part of the catheter (such as a moving tube) to be directly connected to the driving mechanism (handle), which is heavy, bulky, and has poor clinical applicability. Partial separation reduces the quality of the conveying components, improves the control precision of the conveying operation, avoids the excessive load of the system affecting the operation of the doctor, thereby improving the success rate of the operation. Secondly, the above-mentioned conveying system can select a motor with suitable output power according to different load conditions, and adjust the compressive strength of the hydraulic cylinder at the same time (such as selecting a hydraulic cylinder with a large wall thickness and/or selecting a hydraulic cylinder with a large cylinder diameter), In order to achieve stable and efficient release and closing operation of the delivery system.

In general, the conveying system of the present invention has stable structure, high transmission efficiency, strong ease of use, and can be adapted to conveying systems of various specifications, thereby reducing the cost of a single operation by replacing different actuators.

It should also be known that the preferred embodiments of the present invention are as described above, but are not limited to the scope disclosed by the above preferred embodiments. For example, the present invention does not specifically limit the implementation of the motor-driven piston movement, as long as the power output from the motor can be used to finally It is enough to realize the reciprocating movement of the piston.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes and modifications made by those of ordinary skill in the field of the present invention based on the above disclosure all belong to the protection scope of the present invention.

Claims

A delivery system for delivering an implant, comprising a connected delivery assembly and a drive assembly, the drive assembly being provided separately from the delivery assembly;

The conveying assembly includes a fixed pipe, a moving pipe and a pressure part; the fixed pipe and the moving pipe can move relative to each other;

The pressure member is disposed at the proximal end of the delivery assembly and includes a sealed cavity and a moving piece; the moving piece is movably disposed in the sealed cavity and divides the sealed cavity into an axial arrangement the release cavity and the closed cavity; the moving tube is connected with the moving part;

The driving component is used for delivering the medium to the release chamber to drive the moving member to move in the first direction, and the driving component is also used for delivering the medium to the closed chamber to drive the moving member to the second direction The direction moves to realize the relative movement of the fixed pipe and the moving pipe.
The delivery system for delivering implants according to claim 1, wherein the drive assembly includes a drive mechanism; the drive mechanism includes a motor assembly and a hydraulic cylinder assembly; the motor assembly is used to drive the The hydraulic cylinder assembly conveys the medium.
3. The delivery system for delivering implants of claim 2, wherein the hydraulic cylinder assembly includes a hydraulic cylinder block and a piston that divides the space within the hydraulic cylinder into a release drive chamber and a piston. a closed drive chamber; the release drive chamber has a first outlet, the closed drive chamber has a second outlet;

The motor assembly is used for driving the piston to move in a third direction, so that the medium in the release driving chamber flows out through the first outlet and flows into the release cavity through the conduit; the motor assembly is used for driving the piston Movement in the fourth direction causes the medium in the closed drive chamber to flow out through the second outlet and into the closed cavity through the conduit.
The delivery system for delivering implants according to claim 2 or 3, wherein the driving assembly further comprises a control box, and the driving mechanism is arranged in the control box.
The delivery system for delivering implants according to claim 2 or 3, wherein the motor assembly comprises a rotary motor, the driving mechanism further comprises a motion conversion mechanism, and the rotary motion of the rotary motor passes through the The motion conversion mechanism is converted into linear motion; or, the motor assembly includes a linear motor.
The delivery system for delivering implants according to claim 2 or 3, wherein the drive assembly further comprises an emergency stop button for cutting off the power supply of the motor assembly.
The delivery system for delivering implants according to claim 4, wherein the drive assembly further comprises a control box bracket, and the control box is disposed on the control box bracket.
The delivery system for delivering implants according to claim 1 or 2, wherein the pressure member further comprises a housing, and the sealed cavity is provided in the housing; or, the pressure member also includes a casing, the casing includes a first casing and a second casing, the second casing is disposed in the first casing, and the sealed cavity is disposed in the second casing;

The casing is provided with a first joint and a second joint; the first joint is detachably connected to one end of one of the high-pressure pipes; the second joint is detachably connected to one end of the other high-pressure pipe ;

The control box is provided with a first interface and a second interface, the first interface is detachably connected to the other end of one of the high-pressure pipes, and the second interface is connected to the other end of the other high-pressure pipe. The other end is detachably attached.
The delivery system for delivering an implant according to claim 1 or 2, wherein the delivery system further comprises a control assembly communicatively connected to the drive assembly, the control assembly for controlling the drive component conveying medium;

The control assembly is disposed separately from the conveying assembly, or the control assembly, the conveying assembly and the driving assembly are disposed separately from each other.
10. The delivery system for delivering an implant of claim 9, wherein the control assembly is configured as a portable device when the control assembly, the drive assembly and the delivery assembly are disposed separately from each other .
The delivery system for delivering implants according to claim 10, wherein the portable device is provided with a control button and a communication interface; the communication interface is connected with the drive assembly via wired or wireless communication ; the control button has a first position and a second position;

When the control button is at the first position, the control assembly releases a first signal to the drive assembly, so that the drive assembly delivers the medium to the release cavity;

When the control button is in the second position, the control assembly releases a second signal to the drive assembly to cause the drive assembly to deliver medium to the closed cavity.
The delivery system for delivering implants according to claim 1 or 2, wherein the driving component comprises a human-machine interface for inputting information; the information comprises the moving speed of the moving tube, At least one of travel stroke and medium pressure.
The delivery system for delivering implants according to claim 1 or 2, wherein the pressure member further comprises a first sealing member, a second sealing member and a third sealing member, and the sealing cavity has a The second sealing member and the third sealing member are respectively provided at both ends, and the first sealing member is provided on the moving member.
The delivery system for delivering implants according to claim 1 or 2, wherein an extension tube is provided at the proximal end of the moving member, and the proximal end of the extension tube extends out of the sealed cavity. proximal.
A delivery system for delivering an implant according to claim 1 or 2, wherein the drive assembly comprises a pressure sensor for detecting the flow of the medium leading to the release cavity or the closed cavity pressure.