Delivery systems for delivering implants

Abstract

The present invention relates to a delivery system for delivering an implant, comprising a delivery assembly and a driving assembly connected in sequence; the driving assembly is separately arranged from the delivery assembly; the delivery assembly comprises a moving tube, a fixed tube and a pressure component, and the moving tube and the fixed tube can move relatively; the pressure component is arranged at the proximal end of the delivery assembly, and the moving part of the pressure component is movably arranged in a sealed cavity; the moving tube is connected to the moving part; the driving assembly is used to deliver a medium to a release cavity in the sealed cavity to drive the moving part to move in a first direction, so as to realize the release of the implant; the driving assembly is also used to deliver a medium to a closed cavity in the sealed cavity to drive the moving part to move in a second direction, so as to realize the loading of the implant. The advantages of the present invention are that the safety of the instrument is improved, and the delivery control accuracy is also improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a delivery system for delivering an implant. Background Art

[0002] Transcatheter stent implantation is a minimally invasive treatment for cardiovascular diseases that is commonly used in recent years. Its principle is to load the artificial stent into the delivery system, and then release the artificial stent at the target location through the catheter of the delivery system. In heart valve diseases, transcatheter stent implantation avoids the huge trauma to patients caused by cardiac arrest after open-chest treatment in conventional surgical treatment.

[0003] This technology requires doctors to operate the stent and release the stent accurately and stably at the appropriate position of the stent. The commonly used delivery system adopts mechanical structure transmission, so the operating handle is generally large in mass and volume, and cannot be operated as easily as commonly used surgical tools. In addition, the doctor's control accuracy of the delivery system is also low. At the same time, the delivery system with traditional mechanical structure transmission is more complicated to operate, which indirectly increases the operation time and directly affects the operation results. In addition, the pushing force provided by the traditional delivery system is not compatible with a variety of stents and has low flexibility.

[0004] In addition, the existing hydraulic delivery system generally sets the hydraulic chamber in the catheter part of the delivery system, or even directly connects it to the chamber of the stent coating. Since the catheter part, especially the distal end of the catheter, needs to be delivered into the patient's body, such a setting has certain safety hazards. For example, when the hydraulic chamber leaks, it will affect the doctor's judgment on the release accuracy of the implant on the one hand, and may also cause liquid to leak into the patient's body on the other hand. In addition, the delivery catheter in the traditional hydraulic delivery system requires at least part of the catheter (such as the moving tube) to be directly connected to the drive mechanism (handle). During the delivery process, the drive mechanism needs to move together. At this time, the mass of the delivery handle is large, which reduces the delivery control accuracy, and excessive load also affects the doctor's operation, reducing the success rate of the operation.

[0005] Therefore, a conveying system with simple operation, high control accuracy, ease of use, good flexibility and good safety is needed. Summary of the invention

[0006] The purpose of the present invention is to provide a delivery system for delivering implants, which improves the safety of the instrument by arranging a pressure component at the proximal end of the delivery component. In particular, it reduces the weight of the delivery component, improves the delivery control accuracy, and improves the success rate of the operation.

[0007] To achieve the above-mentioned purpose, the present invention provides a delivery system for delivering an implant, comprising a delivery component and a drive component connected to each other; the drive component is separately arranged from the delivery component;

[0008] The conveying assembly comprises a moving tube, a fixed tube and a pressure component; the fixed tube and the moving tube are capable of relative movement;

[0009] The pressure component is arranged at the proximal end of the conveying assembly and includes a sealed cavity and a moving member; the moving member is movably arranged in the sealed cavity and divides the sealed cavity into a release cavity and a closed cavity arranged axially; the moving tube is connected to the moving member;

[0010] The driving assembly is used to transport medium to the release chamber to drive the moving member to move in a first direction. The driving assembly is also used to transport medium to the closing chamber to drive the moving member to move in a second direction to achieve relative movement of the fixed tube and the moving tube.

[0011] Optionally, the driving assembly includes a driving mechanism, and the driving 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.

[0012] Optionally, the hydraulic cylinder assembly includes a hydraulic cylinder body and a piston, wherein the piston divides the space in the hydraulic cylinder body into a release drive chamber and a closing drive chamber; the release drive chamber has a first outlet, and the closing drive chamber has a second outlet;

[0013] The motor assembly is used to drive the piston to move in a third direction, so that the medium in the release drive chamber flows out through the first outlet and flows into the release chamber through the conduit; the motor assembly is used to drive the piston to move in a fourth direction, so that the medium in the closing drive chamber flows out through the second outlet and flows into the closing chamber through the conduit.

[0014] Optionally, the driving assembly further includes a control box, and the driving mechanism is disposed in the control box.

[0015] Optionally, the motor assembly includes a rotary motor, the drive 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.

[0016] Optionally, the drive assembly further includes an emergency stop button for cutting off power to the motor assembly.

[0017] Optionally, the drive assembly further includes a control box bracket, and the control box is disposed on the control box bracket.

[0018] Optionally, the pressure component further includes a shell, and the sealed cavity is arranged in the shell; or, the pressure component further includes a shell, and the shell includes a first shell and a second shell, the second shell is arranged in the first shell, and the sealed cavity is arranged in the second shell;

[0019] The housing 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;

[0020] 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 detachably connected to the other end of the other high-pressure pipe.

[0021] Optionally, the conveying system further comprises a control component communicatively connected to the driving component, wherein the control component is used to control the driving component to convey the medium;

[0022] The control component is arranged separately from the conveying component, or the control component, the conveying component and the driving component are arranged separately from each other.

[0023] Optionally, when the control component, the drive component and the conveying component are arranged separately from each other, the control component is configured as a portable device.

[0024] Optionally, the portable device is provided with a control button and a communication interface; the communication interface is connected to the driving component by wire or wireless communication; the control button has a first position and a second position;

[0025] When the control button is located at the first position, the control component releases a first signal to the drive component, so that the drive component delivers a medium to the release chamber;

[0026] When the control button is located at the second position, the control component releases a second signal to the drive component to enable the drive component to transport a medium to the closed chamber.

[0027] Optionally, the driving component includes a human-computer interaction 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.

[0028] Optionally, the pressure component further includes a first sealing component, a second sealing component and a third sealing component, the second sealing component and the third sealing component are respectively arranged at two ends of the sealed cavity, and the first sealing component is arranged on the moving part.

[0029] 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.

[0030] Optionally, the driving assembly includes a pressure sensor for detecting the pressure of the medium leading to the release chamber or the closing chamber.

[0031] The above-mentioned delivery system sets the pressure component at the proximal end of the delivery component, avoiding the need to set the pressure component on the catheter portion of the delivery component, thereby avoiding safety issues caused by leakage in the medium cavity when the distal end of the catheter is delivered into the patient's body, thereby improving the safety of the device.

[0032] The above-mentioned conveying system uses the pressure provided by the medium to drive the moving tube to move, thereby realizing the loading and releasing of the implant, so that the conveying system can withstand loads of different sizes, thereby making the conveying system applicable to different implants and having good flexibility.

[0033] The above-mentioned delivery system separates the driving component, the control component and the delivery component in space, that is, they are not in the same physical integrated space. This reduces the mass of the delivery component (i.e., the delivery handle), improves the delivery control accuracy, avoids excessive load on the delivery component affecting the operator's operation, and thus improves the success rate of the operation.

[0034] Since the driving component of the above-mentioned conveying system is independently arranged from the conveying component, the two have little interference with each other. Therefore, when the conveying component is modified, for example, when the conveying component is given new functions, the restriction of the driving component is small, thereby reducing the difficulty of modifying the conveying component, which is conducive to expanding the functions of the conveying system and improving the performance of the conveying system.

[0035] Since the control component and the drive component of the above-mentioned conveying system are separated in space, that is, the two are not integrated in the same physical space, such a structure avoids increasing the volume of the drive component, thereby reducing the space occupied by the area around the operating table to avoid affecting the surgical operation, and also facilitates the sterilization of the control component separately, reducing the difficulty of sterilization and ensuring the safety of the operation.

[0036] The control component of the above-mentioned delivery system is particularly a portable device. On the one hand, it is convenient to sterilize the control component to further ensure the safety of the operation. On the other hand, it has the advantages of being small and light, which is convenient for doctors to operate.

[0037] The above-mentioned delivery system has a stable structure, high transmission efficiency, and strong ease of use. It can be adapted to delivery systems of various specifications and significantly reduce surgical costs by replacing different actuators. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Those skilled 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.

[0039] Figure 1 is a schematic structural diagram of a conveying component in a conveying system in a preferred embodiment of the present invention;

[0040] Figure 2 It is a schematic diagram of the structure of wired communication between the driving component and the control component in the conveying system in the preferred embodiment of the present invention;

[0041] Figure 3a is a schematic axial cross-sectional view of a conveying assembly in a preferred embodiment of the present invention, wherein the conveying assembly is in a closed state;

[0042] Figure 3b is a schematic axial cross-sectional view of a conveying assembly in a preferred embodiment of the present invention, wherein the conveying assembly is in an open state;

[0043] Figure 4a is a schematic structural diagram of a control box in a drive assembly in a preferred embodiment of the present invention;

[0044] Figure 4b is a schematic structural diagram of a driving mechanism in a preferred embodiment of the present invention;

[0045] Figure 5 It is a schematic diagram of the structure of the control component in the preferred embodiment of the present invention.

[0046] The following are the descriptions of the reference numerals:

[0047] 1-transport assembly; 101-first joint; 102-second joint; 110-fixed tube; 111-fixed member; 120-moving tube; 130-pressure member; 131-release chamber; 1311-second sealing member; 1312-third sealing member; 132-closing chamber; 140-first housing; 150-moving member; 151-first sealing member; 152-extension tube; 160-conical head; 170-sheath tube; 2-driving assembly; 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-connecting block; 310-first outlet; 311-second outlet; 312-piston; 313-hydraulic cylinder; 3-control component; 401-communication interface; 402-control button; 403-bump; 4-catheter; 5-signal control line.

[0048] The same or similar reference numerals in the drawings represent the same or similar components. DETAILED DESCRIPTION

[0049] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be noted that the drawings are all in simplified form and not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. As used in this specification and the appended claims, the singular forms "one", "an" and "the" include plural objects, unless the content clearly indicates otherwise. As used in this specification and the appended claims, the term "or" is usually used to include the meaning of "and / or", unless the content clearly indicates otherwise. The terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0050] In the following description, for ease of description, "distal end" and "proximal end" are used; "distal end" is the side away from the operator of the delivery system, that is, the end that first enters the body; "proximal end" is the side close to the operator of the delivery system; "axial" refers to the direction along the axis of the catheter. In addition, in the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.

[0051] The core idea of ​​the present invention is to provide a delivery system for delivering implants, which improves the safety of the device by setting the medium cavity (i.e., sealed cavity) at the proximal end of the delivery component. In particular, the delivery system uses electric and hydraulic methods to drive the moving tube to move, realize the loading and release of the implant, so that the delivery system can withstand loads of different sizes, and the pushing force provided thereby can be compatible with different implants (the pushing force required for different implants will be different, such as coronary stents, which require a larger pushing force), so that the delivery system can be applied to different implants with good flexibility. In particular, the driving component is separated from the delivery component, which reduces the mass of the delivery component, improves the delivery control accuracy, avoids excessive load on the delivery component affecting the operator's operation, and thus improves the success rate of the operation. Moreover, since the driving component is set independently of the delivery component, the two have little mutual interference, so when the delivery component is modified, for example, when the delivery component is given a new function, it is less restricted by the driving component, thereby reducing the difficulty of modifying the delivery component, which is conducive to expanding the function of the delivery system and improving the performance of the delivery system. In addition, the delivery system of the present invention is simple to operate and convenient for doctors to operate.

[0052] It should be known that the present invention has no requirements on the type of implants to which it is applicable, 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 can be understood by those skilled in the art that the delivery system disclosed in the present invention can be used to place other implants (such as vascular stents, aneurysm stents, balloon dilatation stents, ureteral stents, prostate stents, peripheral stents, tracheobronchial stents, etc.) into corresponding positions of the body in addition to valve stents. The implants can also be grafts, embolic devices, blocking devices, etc. The present invention does not limit the access method of the delivery system, and access to the treatment site can be provided by various techniques and methods, for example, percutaneous transluminal angioplasty, etc.

[0053] The conveying system of the present invention is further explained and illustrated below in conjunction with the accompanying drawings and preferred embodiments.

[0054] like Figure 1 and Figure 2As shown, this embodiment provides a delivery system for an implant, the delivery system comprising a delivery component 1 and a drive component 2. Preferably, the delivery system further comprises a control component 3, and the control component 3 is in wired or wireless communication with the drive component 2. In some embodiments, the control component 3 is in wired communication with the drive component 2 via a signal control line 5. Wherein the drive component 2 is not arranged on the delivery component 1, so that the drive component 2 and the delivery component 1 are separated or separated in space, that is, the delivery component 1 and the drive component 2 are not integrated in the same container or are not tightly connected in physical space. Further, the control component 3 is also not arranged on the delivery component 1, so that the delivery component 1 and the control component 3 are separated or separated in space, that is, the delivery component 1 and the control component 3 are not integrated in the same container or are not tightly connected in physical space. Further, the control component 3 is used to send a drive signal to the drive component 2, so that the drive component 2 works according to the drive signal and controls the working state (open state and closed state) of the delivery component 1, realizes the loading and release of the implant, and the resetting of the delivery component 1.

[0055] like Figure 3a and Figure 3b As shown, the delivery assembly 1 includes a fixed tube 110, a mobile tube 120, a pressure component 130, a conical head 160 and a sheath tube 170. The pressure component 130 is arranged at the proximal end of the delivery assembly 1 and includes a sealed cavity. The pressure component 130 preferably includes a first shell 140, the first shell 140 is sleeved on the outside of the mobile tube 120, and the sealed cavity is arranged in the first shell 140. Further, a part of the fixed tube 110 penetrates the first shell 140, and the proximal end of the fixed tube 110 is fixedly connected to the first shell 140. Optionally, the fixed tube 110 is fixedly connected to the first shell 140 through a fixing member 111. Further, another part of the fixed tube 110 is connected to the conical head 160 after extending out of the first shell 140. The fixed tube 110 and the mobile tube 120 can move relative to each other. The conical head 160 is preferably a non-invasive head, such as a non-invasive structure such as a cone, a partial sphere, a circle, etc., to prevent, inhibit or substantially prevent damage to the target tissue. The conical head 160 is used to cooperate with the sheath tube 170 to achieve the loading and release of the implant. The conical head 160 and the fixing tube 110 can be formed separately or in one piece; the so-called "separate" forming means that the conical head 160 and the fixing tube 110 are processed separately and then assembled together; the so-called "integrated" forming means that the fixing tube 110 with the conical head 160 is processed at one time.

[0056] The pressure component 130 also includes a moving part 150, and the moving part 150 is movably arranged in the sealed cavity. The moving part 150 divides the sealed cavity into an axially arranged release chamber 131 and a closed chamber 132, and the two chambers are sealed from each other. And the moving part 150 is connected to the moving tube 120. Further, the moving tube 120 is sleeved outside the fixed tube 110, that is, the moving tube 120 is an outer tube, and the fixed tube 110 is an inner tube, and the proximal end of the moving tube 120 is connected to the moving part 150, and the distal end of the moving tube 120 extends out of the first shell 140 and is connected to the sheath tube 170. In other embodiments, the fixed tube 110 is sleeved outside the moving tube 120, that is, the moving tube 120 is an inner tube, and the fixed tube 110 is an outer tube. In this embodiment, Figure 3a As shown, the fixed tube 110 is an inner tube, the movable tube 120 is an outer tube, and the inner tube has a through cavity to provide a passage for the guide wire.

[0057] The sheath tube 170 and the mobile tube 120 can be formed separately or in one piece. Similarly, the so-called "separate" forming means that the sheath tube 170 and the mobile tube 120 are processed separately and then assembled together; the so-called "in one piece" forming means that the mobile tube 120 with the sheath tube 170 is processed at one time. The present invention has no special requirements on the structure of the sheath tube 170, and those skilled in the art can choose a conventional structure to wrap the implant.

[0058] In actual operation, the driving assembly 2 is used to deliver a medium to the release chamber 131 of the delivery assembly 1, so as to drive the moving member 150 to move toward the proximal end of the fixed tube 110 (i.e., the first direction) through the pressure of the medium, thereby driving the moving tube 120 to move toward the proximal end of the fixed tube 110, so that the sheath tube 170 is away from the conical head 160, and the Figure 3b In the open state shown, the implant can be released at this time; in addition, the driving component 2 is also used to deliver a medium to the closed cavity 132 of the delivery component 1, so as to drive the moving member 150 to move toward the distal end of the fixed tube 110 (i.e., the second direction) through the pressure of the medium, thereby driving the moving tube 120 to move toward the distal end of the fixed tube 110, so that the sheath tube 170 is close to the conical head 160, and finally Figure 3a The closed state shown in the figure, at this time, the loading of the implant or the resetting of the delivery system can be achieved. In addition, when loading the implant, the sheath tube 170 can wrap all or part of the implant. It should be understood that the medium is mainly an incompressible and fluid liquid, such as pure water, saline, oil, etc., preferably saline.

[0059] Furthermore, the driving signal includes a release signal (first signal) and a closing signal (second signal). When the control component 3 sends a release signal to the driving component 2, the driving component 2 delivers the medium to the release chamber 131 of the conveying component 1; conversely, when the control component 3 sends a closing signal to the driving component 2, the driving component 2 delivers the medium to the closing chamber 132 of the conveying component 1.

[0060] It can be seen that the pressure component 130 in the delivery system of the present embodiment is arranged at the proximal end of the delivery component 1, rather than at the distal end of the delivery component 1. In this way, the pressure component is avoided to be arranged on the catheter part of the delivery component 1, thereby avoiding the safety problem caused by the leakage of the hydraulic chamber when the distal end of the catheter is delivered to the patient's body, thereby improving the safety of the device. In addition, the delivery system uses hydraulic pressure to drive the moving tube 120 to move, so that the delivery system can withstand loads of different sizes, that is, the thrust force provided can adapt to different implants, so that the delivery system can be applied to different implants, and has good flexibility. In particular, the present invention separates the drive component from the delivery component instead of integrating them together, reduces the mass of the delivery component, avoids the excessive load on the delivery component affecting the operation of the operator, thereby improving the delivery control accuracy and the success rate of the operation. In addition, since the drive component is set independently of the delivery component, the two have little mutual interference, so when the delivery component is modified, for example, when the delivery component is given a new function, it is less restricted by the drive component, thereby reducing the difficulty of modifying the delivery component, which is conducive to expanding the function of the delivery system and improving the performance of the delivery system.

[0061] It is further preferred that the control component 3 and the drive component 2 are separated or separately arranged in space rather than being integrated in the same container in physical space. The advantage of this is that it avoids increasing the volume of the drive component, thereby reducing the space occupied by the area around the operating table to avoid affecting the surgical operation, and it is also convenient to sterilize the control component 3 separately, reducing the difficulty of sterilization and ensuring the safety of the operation. Further, the control component 3 is preferably a portable device, which is convenient for sterilizing the control component 3 to ensure the safety of the operation on the one hand, and has the advantages of being small and light on the other hand, which is convenient for doctors to operate.

[0062] Continue reading Figure 2 The drive assembly 2 delivers the medium to the delivery assembly 1 through an external catheter 4. Preferably, the catheter 4 is a high-pressure-resistant catheter (i.e., a high-pressure tube) to adapt to the purpose of delivering different implants by the delivery system. In the illustrated embodiment, there are two catheters 4, which are connected to the release chamber 131 and the closing chamber 132, respectively. In other embodiments, the number of catheters 4 can be increased or decreased. In addition, as Figure 1 , Figure 3a and Figure 3bAs shown, the first housing 140 is provided with a first connector 101 and a second connector 102, the first connector 101 is communicated with the release chamber 131, the second connector 102 is communicated with the closing chamber 132, and each connector is detachably connected to a corresponding conduit 4, so that each conduit 4 is connected to the corresponding cavity through the corresponding connector. It should be known that the present invention does not limit the structure of the drive component 2 to convey the medium to the conveying component 1. For example, in other embodiments, it can also be realized by a multi-way connector, or other suitable structures are used to convey the medium to the two cavities.

[0063] Furthermore, considering that the first shell 140 is usually made of a polymer material and the pressure it withstands is easily limited, in order to overcome this problem, the pressure component 130 is designed to also include a second shell (not marked), which is arranged in the first shell 140. The sealed cavity is arranged in the second shell, and the material of the second shell is a metal material with good biocompatibility, so that the sealed cavity can withstand a larger pressure, thereby further improving the delivery capacity of the delivery system to adapt to the delivery of different implants.

[0064] like Figure 3a and Figure 3b As shown, in order to improve the sealing performance, the pressure component 130 preferably also includes a first sealing component 151, a second sealing component 1311 and a third sealing component 1312, wherein the first sealing component 151 is arranged on the moving member 150, and the second sealing component 1311 and the third sealing component 1312 are respectively arranged at both ends of the sealed cavity. Under the action of the three sealing components, the sealing performance of the release chamber 131 and the closed chamber 132 is guaranteed, and the safety and accuracy of the conveying component 1 are further improved. In some embodiments, the first sealing component 151, the second sealing component 1311 and the third sealing component 1321 are sealing rings, and the structure and material of each sealing component are not limited by the present invention. Each sealing component can be made of silicon, rubber, polymer, elastomer, and a combination thereof, or other compliant materials suitable for forming a seal. In some embodiments, any one of the sealing components can be a gasket or an O-ring, which is made of rubber in whole or in part. In other embodiments, any one of the sealing components can be a saccular seal. Other types of sealing components can be used if necessary or desired.

[0065] Preferably, an extension tube 152 is also provided at the proximal end of the first sealing component 151. When the conveying component 1 is in a closed state or an open state, the extension tube 152 extends out of the proximal end of the pressure component 130 (i.e., extends out of the second shell), thereby improving the movement stability of the sealing moving component 150 and further improving the safety and accuracy of the conveying. The extension tube 152 is integrally formed with the moving tube 120, or is separately formed from the moving tube 120. Preferably, the conveying component 1 also includes an emptying component (not shown in the figure), which is used to discharge the air in the sheath 170 before loading the implant, that is, to achieve the emptying problem of the distal end of the moving tube 120, that is, before the operation, the air in the sheath 170 needs to be discharged using the emptying component. Here, the emptying component is a conventional setting, so the present invention does not describe this structure in detail, and those skilled in the art can set it according to their own needs.

[0066] like Figure 4a and Figure 4b As shown, the driving assembly 2 further includes a driving mechanism, and further includes a control box (not marked), and the driving mechanism is arranged in the control box. The driving mechanism is used to convey the medium to the release chamber 131 or the closing chamber 132, and further, the driving mechanism is used to convey the medium to the release chamber 131 or the closing chamber 132 after receiving the driving signal sent by the control assembly 3. The control box is used to protect the driving mechanism. The driving mechanism includes a motor assembly and a hydraulic cylinder assembly, and the driving force output by the motor assembly drives the hydraulic cylinder assembly to convey the medium.

[0067] In some embodiments, the motor assembly includes a rotary motor, and the drive mechanism also includes a motion conversion mechanism. The rotary motion of the rotary motor is converted into a linear motion by the motion conversion mechanism, and then the motion conversion mechanism drives the piston in the hydraulic cylinder to move. In some embodiments, the motor assembly includes a linear motor, and the linear motion of the linear motor drives the piston in the hydraulic cylinder to move. In the illustrated embodiment, Figure 4bAs shown, the driving mechanism includes a rotary motor 306, a transmission mechanism 307, a linear module 308, a connecting block 309 and a hydraulic cylinder assembly connected in sequence, the transmission mechanism 307 may include a coupling and / or a reducer, and the linear module 308 is a motion conversion mechanism. Optionally, the linear module is a lead screw or a synchronous 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 rotary motion of the rotary motor 306 is transmitted to the linear module 308 through the transmission mechanism 307, and then the linear module 308 converts the rotary 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 active plane of the linear motor is connected to the piston rod in the hydraulic cylinder through the connecting block 309. Further, the driving mechanism may also include a reducer to adjust the output power of the motor assembly through the reducer.

[0068] The hydraulic cylinder assembly specifically includes a hydraulic cylinder body 313 and a piston 312, wherein the piston 312 is movably arranged in the hydraulic cylinder body 31, and the piston 312 divides the space in the hydraulic cylinder body 313 into a release drive chamber and a closing drive chamber, wherein the release drive chamber has a first outlet 310, and the closing 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 arranged on the hydraulic cylinder body 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 closing drive chamber on the other side of the piston 312. Optionally, the control box is provided with a first interface 301a and a second interface 301b, wherein 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 301a 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 joint 101. The second interface 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 joint 102. Thus, the medium in the release drive chamber sequentially passes through the first outlet 310, the first interface 301a, the conduit 4, and the first joint 101 to enter the release chamber 131; similarly, the medium in the closed drive chamber sequentially passes through the second outlet 311, the second interface 301b, the conduit 4, and the second joint 102 to enter the closed chamber 132.

[0069] 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 arranged 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 interaction interface 303, which is arranged on the control box. Some information can be input through the human-machine interaction interface. The information can include the moving speed, moving stroke, medium pressure, etc. of the moving tube, and can also include the type of implant, so that the drive mechanism works according to the input information. In the illustrated embodiment, the drive mechanism communicates with the control assembly 3 by wire. In this case, a signal input port 304 can be arranged on the control box, one end of the above-mentioned signal control line 5 is detachably connected to the signal input port 304, and the other end of the signal control line 5 is connected to the corresponding port on the control assembly 3. In other embodiments, the drive 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. Furthermore, the drive assembly 2 further comprises a control box bracket 305, and 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 table through the control box bracket 305. The control box bracket 305 is preferably provided with wheels, so as to facilitate movement on the ground to adjust the position.

[0070] Furthermore, if Figure 2 and Figure 5 As shown, the control component 3 is configured as a portable device, that is, a handheld remote control. Furthermore, a control button 402 and a communication interface 401 are provided on the portable device, and the communication interface 401 is used to connect to the drive component 2 by wire or wireless communication. 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 toggling to the left, at this time, the portable device sends a release signal, indicating that the implant needs to be released at present; when the control button 402 is toggled to the second position, such as toggling to the right, at this time, the portable device sends a closing signal, indicating that the implant needs to be loaded or the delivery component 1 needs to be reset. The release signal or the closing signal is then sent to the drive component 2 through the communication interface 401. Preferably, an indicator mark is provided on the control button 402, such as an arrow pointing left and right, to indicate the direction of the toggle. More preferably, the control button 402 is provided with a protrusion 403 to indicate the position of the toggle switch to the operator through tactile perception. For example, the protrusion 403 is provided on one side of the control button 402 that deviates from the middle, and is not provided on the other side. When the operator's hand senses the existence of the protrusion 403, he knows that when the position is toggled, a release signal or a closing signal can be issued. If the operator's hand does not sense the protrusion 403, he knows that when the position is toggled, another drive signal can be issued.

[0071] Next, the preferred working mode of the conveying system will be further described.

[0072] Before the operation, the type of implant, the moving speed of the moving tube, the medium pressure and other information are set on the human-machine interface 303, and then the control button 402 is turned to transmit the drive signal to the drive component 2. The rotary motor 306 in the drive component 2 performs forward or reverse rotation after receiving the drive signal, and transmits the rotary pair to the linear module 308 through the transmission mechanism 307. The linear module 308 converts the rotary pair into linear motion, and then drives the piston 312 to perform linear motion in the axial direction in the hydraulic cylinder body 313 through the connecting block 309.

[0073] More specifically, when the control button 402 is pushed 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 rotation motion to drive the piston 312 to move forward. Figure 4b The medium in the release driving chamber of the hydraulic cylinder body 313 is compressed and pushed through the first outlet 310, flows through the first interface 301a, and then enters the release chamber 131 through the catheter 4 and the first connector 101. When the liquid pressure in the release chamber 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 conical head 160, and the implant release operation is realized. After the final release is completed, as shown in FIG. Figure 3b As shown, the volume of the release cavity 131 reaches the maximum at this time. It should be noted that, when releasing the implant, in order to prevent the implant from being moved, 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 cooperates with the conical head 160 on the distal end of the fixing tube to limit the movement of the implant in the distal direction, thereby ensuring the accuracy of the position release.

[0074] In addition, when the control button 402 is pushed rightward 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 move in the opposite direction. Figure 4b The medium in the closed driving chamber is compressed and pushed through the second outlet 311, flows through the second interface 301b, and then enters the closed chamber 132 through the conduit 4 and the second interface 102. At this time, when the liquid pressure in the closed chamber 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 toward the distal end of the fixed tube 110, so that the distal end of the moving tube 120 is close to the conical head 160, and the closing operation of the conveying system is realized. When the volume of the closed chamber 132 reaches the maximum, the conveying assembly 1 returns to the closed chamber 132. Figure 3aShown in closed state.

[0075] It should be understood that the hydraulic cylinder 313 stores the medium in advance. For example, before the catheter 4 is connected to the delivery assembly 1, the medium can be sucked into the hydraulic cylinder 313 through the catheter 4 for storage. Or other suitable methods can be used to store the medium in the hydraulic cylinder 313. In addition, the interface (such as the first interface and the second interface) connected to the catheter 4 on the control box is usually a quick-release interface, which is convenient for quick disassembly and assembly of the catheter 4. The number of quick-release interfaces is usually set according to the number of sealed cavities in the pressure component. In addition, the number of the control buttons 402 can be one or more. If it is one, multiple positions can be set. If it is multiple, the corresponding positions can be controlled by different control buttons 402. In addition, the drive assembly 2 can also 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 medium pressure in the hydraulic cylinder 313 or in the pipeline. The monitored pressure information can be displayed on the human-computer interaction interface 303. Further, the drive assembly 2 can adjust the current delivery pressure according to the monitored pressure to ensure surgical accuracy.

[0076] In summary, according to the technical solution provided by the embodiment of the present invention, the above-mentioned delivery system improves the safety of the system by setting the hydraulic cavity at the proximal end of the delivery component. Moreover, the above-mentioned delivery system realizes the sealing requirements of the pressure component sealing cavity 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 (i.e., the delivery component), improves ease of use, and can reuse the control box. Only the actuator needs to be replaced to complete different operations, which can 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 the moving tube) to be directly connected to the drive mechanism (handle), which is heavy, large in volume, and poor in clinical applicability. The present invention separates the drive component from the catheter part of the delivery component, reduces the mass of the delivery component, improves the control accuracy of the delivery operation, avoids the excessive load of the system from affecting the doctor's operation, and thus improves the success rate of the operation. Secondly, the above-mentioned delivery system can select a motor with a suitable output power according to different load conditions, and adjust the compressive strength of the hydraulic cylinder body (such as selecting a hydraulic cylinder body with a large wall thickness and / or a hydraulic cylinder body with a large cylinder diameter) to achieve stable and efficient release and closing operations of the delivery system.

[0077] In general, the delivery system of the present invention has a stable structure, high transmission efficiency, and strong ease of use, and can be adapted to delivery systems of various specifications, thereby achieving the purpose of reducing the cost of a single operation by replacing different actuators.

[0078] It should also be understood that the preferred embodiments of the present invention are as described above, but are not limited to the scope disclosed in the above preferred embodiments. For example, the present invention does not specifically limit the implementation method of the motor-driven piston movement, as long as the reciprocating movement of the piston can be ultimately achieved through the power output by the motor.

[0079] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the 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 any limitation on the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure are within the scope of protection of the present invention.

Claims

1. A delivery system for delivering an implant, comprising a delivery assembly and a drive assembly connected to each other, wherein the drive assembly is separately arranged from the delivery assembly; The conveying assembly comprises a fixed pipe, a movable pipe and a pressure component; the fixed pipe and the movable pipe are capable of relative movement; The pressure component is arranged at the proximal end of the conveying component and includes a sealed cavity, a moving part and a shell; the moving part is movably arranged in the sealed cavity and divides the sealed cavity into a release cavity and a closed cavity arranged axially; the moving tube is connected to the moving part; the sealed cavity is arranged in the shell; or, the shell includes a first shell and a second shell, the second shell is arranged in the first shell, and the sealed cavity is arranged in the second shell; a first joint and a second joint are arranged on the shell; the first joint is detachably connected to one end of the first high-pressure pipe; the second joint is detachably connected to one end of the second high-pressure pipe; The driving assembly is used to deliver medium to the release chamber to drive the moving member to move in a first direction, and the driving assembly is also used to deliver medium to the closing chamber to drive the moving member to move in a second direction to achieve relative movement between the fixed tube and the moving tube; The driving assembly includes a driving mechanism and a control box; the driving mechanism is arranged in the control box; the control box is provided with a first interface and a second interface, the first interface is detachably connected to the other end of the first high-pressure pipe, and the second interface is detachably connected to the other end of the second high-pressure pipe; the driving 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; the hydraulic cylinder assembly includes a hydraulic cylinder body and a piston, and the piston divides the space in the hydraulic cylinder body into a release driving chamber and a closed driving chamber; The release drive chamber has a first outlet, and the closing drive chamber has a second outlet; the motor assembly is used to drive the piston to move in a third direction, so that the medium in the release drive chamber flows out through the first outlet and flows into the release chamber through the first high-pressure pipe; The motor assembly is used to drive the piston to move in a fourth direction, so that the medium in the closed driving chamber flows out through the second outlet and flows into the closed chamber through the second high-pressure pipe; The conveying system further comprises a control component which is communicatively connected to the driving component, and the control component is used to control the driving component to convey a medium; the control component is separately arranged from the conveying component, or the control component, the conveying component and the driving component are separately arranged from each other.

2. The delivery system for delivering an implant according to claim 1, characterized in that: The motor assembly includes a rotary motor, and the drive mechanism further includes a motion conversion mechanism, and the rotary motion of the rotary motor is converted into a linear motion by the motion conversion mechanism; Alternatively, the motor assembly comprises a linear motor.

3. The delivery system for delivering an implant according to claim 1, characterized in that: The drive assembly also includes an emergency stop button for cutting off the power supply of the motor assembly.

4. The delivery system for delivering an implant according to claim 1, characterized in that: The driving assembly further comprises a control box bracket, and the control box is arranged on the control box bracket.

5. The delivery system for delivering an implant according to claim 1, characterized in that: When the control assembly, the drive assembly, and the conveying assembly are disposed separately from each other, the control assembly is configured as a portable device.

6. The delivery system for delivering an implant according to claim 5, characterized in that: The portable device is provided with a control button and a communication interface; the communication interface is connected to the driving component by wire or wireless communication; the control button has a first position and a second position; When the control button is located at the first position, the control component releases a first signal to the drive component, so that the drive component delivers a medium to the release chamber; When the control button is located at the second position, the control component releases a second signal to the drive component to enable the drive component to transport a medium to the closed chamber.

7. The delivery system for delivering an implant according to claim 1, characterized in that: The driving component includes a human-machine interaction interface for inputting information; the information includes at least one of the moving speed, moving stroke and medium pressure of the moving tube.

8. The delivery system for delivering an implant according to claim 1, characterized in that: The pressure component further comprises a first sealing component, a second sealing component and a third sealing component. The second sealing component and the third sealing component are respectively arranged at two ends of the sealed cavity, and the first sealing component is arranged on the moving part.

9. The delivery system for delivering an implant according to claim 1, characterized in that: An extension tube is arranged at the proximal end of the moving member, and the proximal end of the extension tube extends out of the proximal end of the sealing cavity.

10. The delivery system for delivering an implant according to claim 1, characterized in that: The driving assembly includes a pressure sensor for detecting the pressure of the medium leading to the release chamber or the closing chamber.

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