Delivery system and control handle therefor

Abstract

The present application relates to a delivery system and a control handle thereof, the control handle comprising a handle housing and a line withdrawal mechanism, the handle housing is formed with a main cavity and a side cavity communicating with the main cavity, the side cavity extends in a direction which is at an acute angle with the direction in which the main cavity extends proximally, the line withdrawal mechanism is at least partially located in the side cavity, the line withdrawal mechanism is configured to wind a first pull wire and a second pull wire, the first pull wire is configured to generate a radial binding force on an implant under the constraint of a limiting pin, and the first pull wire releases the radial binding on the implant when the limiting pin is removed, the second pull wire is connected with the limiting pin, and the second pull wire is configured to pull the limiting pin to move proximally relative to the implant to remove the limiting pin. The delivery system and the control handle thereof of the present application are simple to operate and do not increase the overall length of the control handle, the line withdrawal mechanism can wind the first pull wire and the second pull wire, and the risk of surgery is increased due to the residual pull wire in the body.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a delivery system and its control handle. Background Technology

[0002] With the aging population, the incidence of coronary heart disease, cerebrovascular disease, valvular heart disease, and tumors among middle-aged and elderly people is increasing year by year. These diseases directly affect the quality of life and even the life safety of middle-aged and elderly people. Traditional surgical treatment remains the first choice for seriously ill patients. However, for elderly patients, those with multiple organ diseases, those with a history of open-heart surgery, and those with poor physical recovery, traditional surgery carries high risks and mortality rates, and some patients may not even have the opportunity to undergo surgery. In the past decade, interventional treatment of heart valves has made significant progress internationally through continuous exploration and has become the most promising branch of interventional therapy.

[0003] Interventional therapy is a novel treatment technology developed internationally in recent years. Its principle involves using modern high-tech methods for minimally invasive treatment. Guided by medical imaging equipment, specialized precision instruments are introduced into the body to diagnose and treat internal lesions locally. This technology is characterized by being non-surgical, minimally invasive, allowing for rapid recovery, and providing good results, thus avoiding the harm caused to patients by traditional surgery.

[0004] As the control structure for the entire interventional procedure, the handpiece typically comes in purely manual, purely electric, or hybrid manual-electric versions, all requiring sufficient safety, effectiveness, and cost-effectiveness. However, when using a pull wire to restrain the implant, the handpiece in these technologies presents a risk of surgical complications due to the difficulty in retrieving the wire. Summary of the Invention

[0005] Based on this, a delivery system and its control handle are provided to solve the problem that when using a pull wire to restrain an implant, the pull wire is not easy to retrieve, which may cause surgical risks.

[0006] On one hand, the present invention provides a control handle, comprising:

[0007] The handle housing has a main cavity and a side cavity communicating with the main cavity, wherein the direction in which the side cavity extends proximally forms an acute angle with the direction in which the main cavity extends proximally;

[0008] A suture removal mechanism, at least partially located within the side cavity, is configured to wind up a first pull wire and a second pull wire. One end of the first pull wire is connected to the suture removal mechanism, and the other end is connected to the implant. One end of the second pull wire is connected to the suture removal mechanism, and the other end is connected to a limiting pin. The first pull wire is configured to exert a binding force on the implant radially under the constraint of the limiting pin, and when the limiting pin is removed, the first pull wire releases the radial constraint on the implant. The second pull wire is configured to pull the limiting pin proximally relative to the implant to remove the limiting pin.

[0009] On the other hand, the present invention provides a conveying system including the control handle described above.

[0010] The aforementioned delivery system and its control handle have a suture removal mechanism located in a side cavity that communicates with the main cavity of the handle housing. This makes suture removal easy, reduces the risk of misoperation, and does not increase the overall length of the control handle. Furthermore, the suture removal mechanism can reel in the first and second pull-in sutures, preventing suture residue from remaining in the body and increasing surgical risks. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of a conveying system according to an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of the conduit assembly of a delivery system according to one embodiment;

[0014] Figure 3 A schematic diagram of the handle housing, bending control mechanism, and wire withdrawal mechanism of a conveying system according to one embodiment;

[0015] Figure 4 A schematic diagram of the wire removal mechanism in the control handle of a conveying system according to one embodiment;

[0016] Figure 5 A schematic diagram of the structure of the unwinding mechanism for winding the first pull wire in the control handle of a conveying system according to one embodiment;

[0017] Figure 6 for Figure 5 The diagram showing a partial structure of the wire-removing mechanism illustrates the engagement between the first pawl and the first ratchet.

[0018] Figure 7 A schematic diagram of the structure of the unwinding mechanism for winding the second wire in the control handle of a conveying system according to one embodiment;

[0019] Figure 8 A schematic diagram of the bending control mechanism of the control handle in a conveying system according to one embodiment;

[0020] Figure 9 A schematic diagram of another embodiment of the bending control mechanism for the control handle;

[0021] Figure 10 This is a cross-sectional structural schematic diagram of a conveying system according to one embodiment;

[0022] Figure 11 A schematic diagram of the structure of the first operating part in the control handle of a conveying system according to one embodiment;

[0023] Figure 12 for Figure 10 A magnified view of the circular portion of the structure;

[0024] Figure 13 A schematic diagram of the structure of the first operating part in the control handle of a conveying system according to one embodiment;

[0025] Figure 14 A schematic diagram of another state of the first operating part in the control handle of a conveying system according to one embodiment;

[0026] Figure 15 This is a schematic diagram of the implant delivered by a delivery system according to one embodiment.

[0027] Figure label:

[0028] 100. Conveying system; A. Bending control line; B. First pull line; C. Second pull line; D. Limit pin; 10. Control handle; 10a. Front housing; 11. Handle housing; 11a. Main cavity; 11b. Second side cavity; 11c. First side cavity; 12. Bending control mechanism; 121. Guide component; 121a. Guide groove; 122. Traction component; 123. Drive component; 124. Bending control knob; 13. Second guide assembly; 13a. First roller; 13b. Second roller; 14. First operating part; 141. Guide tube; 142. Transmission component; 143. First knob; 15. Second operating part; 151. Connecting tube; 151a. Limit groove; 152. Linkage component; 153. Second knob; 154. Pressing component; 154a. Threaded mating part; 154b. Limiting part ; 155, First spring; 156, Locking element; 157, Second spring; 16, Wire removal mechanism; 16a, Mounting cover; 161, First winding reel; 162, Second winding reel; 163, First wire removal knob; 164, Second wire removal knob; 161a, First ratchet; 161b, Limiting tooth surface; 161c, Guide tooth surface; 162a, Second ratchet; 165, First pawl; 166, Second pawl; 17, First guide assembly; 17a, First guide wheel; 17b, Second guide wheel; 17c, Third guide wheel; 20, Catheter assembly; 21, Inner tube; 21a, First venting assembly; 22, Middle tube; 22a, Second venting assembly; 23, Outer tube; 23a, Third venting assembly; 24, Stabilizing tube; 24a, Fourth venting assembly; W, Implant. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0031] The terms “vertical,” “horizontal,” “up,” “down,” “left,” “right,” and similar expressions are for illustrative purposes only and do not represent the only possible implementation.

[0032] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0033] It should be noted that the terms "distal" and "proximal" are used as directional terms, which are commonly used in the field of interventional medical devices. "Distal" refers to the end furthest from the operator (e.g., the doctor) during the procedure, while "proximal" refers to the end closest to the operator. Axial direction refers to the direction in which the central axis of the medical device extends; radial direction refers to the direction perpendicular to the aforementioned axial direction. In this application, axial restraint between two objects means that there will be no relative displacement between the two objects along the axial direction. For example, Figure 12 In the second operating part 15 of the control handle 10 shown, the second knob 153 is axially limited to the linkage 152, meaning that the second knob 153 cannot move axially relative to the linkage 152.

[0034] See Figure 1 As shown, this application embodiment provides a delivery system 100, including a control handle 10 and a conduit assembly 20. The proximal end of the conduit assembly 20 is connected to the control handle 10, and the control handle 10 is used to drive at least a portion of the conduit assembly 20 to move axially. The conduit assembly 20 may include two or more conduits, which are arranged in a manner that interlocks with each other and is capable of moving relative to each other axially. For example, combined with Figure 2 As shown, the catheter assembly 20 includes an inner tube 21, a middle tube 22, and an outer tube 23, with the middle tube 22 and the outer tube 23 movably fitted onto the inner tube 21 in sequence. The middle tube 22 and the outer tube 23 can be moved axially relative to the inner tube 21 using the control handle 10, or the outer tube 23 can be moved axially relative to the middle tube 22 to achieve a specific operational purpose.

[0035] To facilitate understanding, the delivery system 100 will be further explained using the example of the delivery system 100 being used to implant an implant into the human body to achieve interventional treatment.

[0036] Specifically, taking the catheter assembly 20, which includes an inner tube 21 and a middle tube 22 and an outer tube 23 sequentially sleeved outside the inner tube 21, as an example, the inner tube 21 is used to construct a guidewire channel so as to construct a delivery path using the guidewire. A receiving cavity is formed between the middle tube 22 and the outer tube 23. The receiving cavity is configured to receive an implant. The distal end of the middle tube 22 is detachably connected to the implant, and when the outer tube 23 moves proximally relative to the middle tube 22, the implant is moved out of the receiving cavity from the distal end of the outer tube 23. In some embodiments, when the outer tube 23 is moved distally relative to the middle tube 22, the implant can be retrieved into the outer tube 23 and then inserted into the receiving cavity.

[0037] It should be noted that the implant can be a vascular stent, a prosthetic valve, or an occluder, etc. Correspondingly, the implantation site can be a blood vessel, the heart, or the left atrial appendage, etc.

[0038] Combination Figure 3 As shown, in some embodiments, the control handle 10 includes a handle housing 11 and a thread-removing mechanism 16. The handle housing 11 has a main cavity 11a and a first side cavity 11c communicating with the main cavity 11a, and at least a portion of the thread-removing mechanism 16 is located within the first side cavity 11c. With this structural arrangement, the thread-removing mechanism 16 does not increase the overall length of the control handle 10 and is easy to operate.

[0039] To facilitate understanding, the release of the implant will be explained below in conjunction with the structure of the control handle 10.

[0040] After the catheter assembly 20 containing the implant is inserted into the body and the implant is positioned appropriately, the implant can be released to the implantation site by manipulating the middle tube 22 and the outer tube 23 to move axially.

[0041] Specifically, in combination Figure 10 and Figure 11As shown, the control handle 10 includes a first operating portion 14 and a second operating portion 15 connected to each other. Both the first operating portion 14 and the second operating portion 15 are connected to the handle housing 11. For ease of description, the first operating portion 14 is specifically defined as being located on the proximal side of the second operating portion 15. In some embodiments, the second operating portion 15 is connected to the distal end of the first operating portion 14, and the proximal end of the first operating portion 14 is connected to the handle housing 11. The first operating portion 14 is connected to the middle tube 22 and is configured to operate the middle tube 22 to move axially relative to the inner tube 21. The second operating portion 15 is connected to the outer tube 23 and is configured to operate the outer tube 23 to move axially relative to the inner tube 21. Thus, the middle tube 22 and the outer tube 23 can be operated independently relative to the inner tube 21 by the first operating portion 14 and the second operating portion 15 without mutual interference. Understandably, when the first operating unit 14 keeps the middle tube 22 stationary relative to the inner tube 21, the second operating unit 15 operates the outer tube 23 to move axially relative to the inner tube 21, thereby enabling the outer tube 23 to move axially relative to the middle tube 22. The relative movement between the outer tube 23 and the middle tube 22 is used to move the implant out of or into the receiving cavity.

[0042] Since the first operating unit 14 can operate the middle tube 22 to move axially relative to the inner tube 21, the middle tube 22 can also be retracted by operating the middle tube 22 to move proximally relative to the inner tube 21, so as to perform some operation on the implant located at its distal end using the middle tube 22.

[0043] For example, in some embodiments, the implant is a self-expanding implant, such as an expandable stent. A self-expanding implant has the property of being compressible and expanding when the compressive force is released.

[0044] The distal end of the central tube 22 is detachably connected to the implant so that when the central tube 22 needs to be retracted after the implant is released, the central tube 22 will not cause adverse interference to the implant.

[0045] In some implementations, the implant can be released by moving the manipulator 22 proximally relative to the inner tube 21.

[0046] The following will combine Figure 15 Using the implant shown as an example, the implant release procedure will be explained.

[0047] Combination Figure 15As shown, the implant W is provided with a first pull cord B and a limiting pin D that constrains the first pull cord B. The first pull cord B can be constrained by the limiting pin D by passing around it. Specifically, the first pull cord B is configured to generate a radial binding force on the implant W located at the distal end of the central tube 22 under the constraint of the limiting pin D, that is, to bind the implant W radially, so that the implant W is in a compressed state, and when the limiting pin D is removed, the first pull cord B releases the radial binding force on the implant W. Understandably, when the first pull cord B generates a radial binding force on the implant W, that is, when the first pull cord B generates a radial gripping force on the implant W, the implant W is compressed due to the radial binding force of the first pull cord B. Correspondingly, when the limiting pin D is removed, the limiting pin D no longer constrains the first pull cord B, and at this time, the first pull cord B releases the radial binding force on the implant W, so that the implant W expands radially due to its own self-expansion properties.

[0048] The limiting pin D is connected to a second pull wire C, which is configured to pull the limiting pin D relative to the implant W proximally to remove the limiting pin D, thereby releasing the constraint of the limiting pin D on the first pull wire B.

[0049] The first pull wire B can be multiple or a single wire. When there are multiple first pull wires B, they can be used to restrain different positions around the implant W, or they can work together to restrain the implant W. Understandably, multiple first pull wires B can be combined into one strand at locations not located on the implant W to facilitate operation of the control handle 10.

[0050] In this embodiment, the implant W is located at the distal end of the central tube 22. Specifically, a first pull wire B wound around the implant W detachably connects the implant W to the central tube 22. It should be noted that the first pull wire B is wound around the inner tube 21. When the central tube 22 moves proximally relative to the inner tube 21, the central tube 22 and the inner tube 21 exert tension on the first pull wire B, causing the first pull wire B to gradually tighten, thereby radially compressing the implant W. This allows the implant W to maintain a small clamping diameter for loading into the receiving cavity between the central tube 22 and the outer tube 23. When the outer tube 23 moves proximally relative to the central tube 22, the implant W is moved out of the receiving cavity from the distal end of the outer tube 23. It should be noted that at this time, the force exerted by the first pull wire B on the implant W can still maintain the implant W in a compressed state, allowing for continued adjustment of the implant W's position for release at a suitable location. Specifically, when it is necessary to release the pressure on the implant W, the first operating part 14 is operated to move the middle tube 22 distally relative to the inner tube 21, thereby reducing the traction force of the first pull wire B on the implant W, so that the radial binding force of the first pull wire B on the implant W also gradually decreases, and the implant W gradually expands.

[0051] Combination Figure 1and Figure 3 As shown, the suture removal mechanism 16 is configured to retract the first pull wire B and the second pull wire C. The two ends of the first pull wire B are connected to the suture removal mechanism 16 and the implant W, respectively, and the two ends of the second pull wire C are connected to the suture removal mechanism 16 and the limiting pin D, respectively. In this embodiment, after the implant W is released, the suture removal mechanism 16 can conveniently pull the first pull wire B and the second pull wire C to remove them, thus avoiding improper traction on the implant W when it is removed from the delivery system 100, which could affect the implantation effect of the implant W.

[0052] Combination Figure 3 and Figure 4 As shown, the wire release mechanism 16 includes a first winding reel 161, a second winding reel 162, a first wire release knob 163, and a second wire release knob 164. Both the first winding reel 161 and the second winding reel 162 are rotatably connected to the handle housing 11. The first wire release knob 163 is connected to the first winding reel 161, and the second wire release knob 164 is connected to the second winding reel 162. The first wire release knob 163 and the second wire release knob 164 are configured to operate the first winding reel 161 and the second winding reel 162 to rotate relative to the handle housing 11, so that the first winding reel 161 and the second winding reel 162 respectively wind up the first pull wire B and the second pull wire C.

[0053] Furthermore, the first winding reel 161 and the second winding reel 162 are coaxially arranged, which makes the overall structure simple and easy to operate.

[0054] Continue reading Figure 3 As shown, in some embodiments, the handle housing 11 is connected to a first guide assembly 17. The first guide assembly 17 is configured to tension the first pull cable B and the second pull cable C and guide them to move in the tensioning direction when the first winding reel 161 and the second winding reel 162 respectively wind up the first pull cable B and the second pull cable C. With this structural arrangement, the probability of the first pull cable B and the second pull cable C becoming tangled can be reduced by using the first guide assembly 17, thereby improving the operational reliability and safety of the control handle 10.

[0055] Specifically, the first guide assembly 17 includes a first guide wheel 17a, a second guide wheel 17b, and a third guide wheel 17c. The first guide wheel 17a, the second guide wheel 17b, and the third guide wheel 17c are all rotatably connected to the handle housing 11. A first wire passage gap is formed between the first guide wheel 17a and the second guide wheel 17b for the first pull cable B to pass through. A second wire passage gap is formed between the second guide wheel 17b and the third guide wheel 17c for the second pull cable C to pass through.

[0056] Combination Figure 5 As shown, in some embodiments, the first unwinding knob 163 is connected to a first ratchet 161a, and the handle housing 11 is provided with a first pawl 165 that cooperates with the first ratchet 161a.

[0057] Specifically, the wire removal mechanism 16 includes a mounting cover 16a, which is connected to the handle housing 11. The connection between the two is not limited to snap-fit ​​connection or screw connection. In some embodiments, the mounting cover 16a and the handle housing 11 are integrally formed.

[0058] The first unwinding knob 163 is rotatably connected to the mounting cover 16a to drive the first ratchet 161a to rotate relative to the handle housing 11. Correspondingly, the first pawl 165 is rotatably connected to the mounting cover 16a and engages with the teeth of the first ratchet 161a.

[0059] Combination Figure 6 As shown, the first pawl 165 has a one-way anti-rotation function for the first ratchet 161a. The teeth on the first ratchet 161a are sawtooth-shaped, with a limiting tooth surface 161b and a guide tooth surface 161c. When the first ratchet 161a is subjected to a clockwise torsional force, the first pawl 165 contacts the limiting tooth surface 161b of the first ratchet 161a, and the force on the first pawl 165 is directed towards its own rotation axis, preventing it from rotating. At this time, the first ratchet 161a is restricted by the locking effect of the first pawl 165 and cannot rotate. When the first ratchet 161a is subjected to a counterclockwise torsional force, the first pawl 165 contacts the guide tooth surface 161c of the first ratchet 161a. The direction of the force exerted by the guide tooth surface 161c on the first pawl 165 is at an angle to the direction pointing towards the rotation axis of the first pawl 165. That is, the force on the first pawl 165 is not directed towards its own rotation axis. Thus, the first pawl 165 can rotate around its own rotation axis, and there is no restraining or limiting action between the limiting tooth surface 161b and the first pawl 165. The first ratchet 161a can then rotate counterclockwise. Therefore, with the cooperation of the first ratchet 161a and the first pawl 165, the first ratchet 161a can only rotate in one direction, thereby achieving a one-way anti-rotation effect.

[0060] In this embodiment, the engagement of the first pawl 165 and the first ratchet 161a ensures that the first unwinding knob 163 can only rotate the first winding reel 161 in the direction of winding the first pull wire B. This configuration maintains the requirement for the first winding reel 161 to wind the first pull wire B while preventing the first pull wire B from detaching from the first winding reel 161 and becoming tangled, thus improving the reliability of the first winding reel 161 in winding the first pull wire B.

[0061] It should be noted that the first ratchet 161a can be integrally formed with the first winding disc 161. That is, the first ratchet 161a is formed on the first winding disc 161. In this way, the first winding disc 161 is not only used to wind the first pull wire B, but also the first winding disc 161 can rotate only in the direction of winding the first pull wire B by engaging with the first pawl 165 through the first ratchet 161a on it.

[0062] In some embodiments, the first ratchet 161a can be fixed relative to the first unwinding knob 163 by means of snap-fitting or welding, and the first winding reel 161 can be fixed relative to the first unwinding knob 163 by means of snap-fitting or welding. In this way, when the first unwinding knob 163 is operated to rotate the first winding reel 161 relative to the handle housing 11, the first ratchet 161a also rotates synchronously. Correspondingly, when the first pawl 165 restricts the rotation of the first ratchet 161a, the first winding reel 161 also cannot rotate relative to the handle housing 11. Thus, by utilizing the one-way anti-rotation performance of the first pawl 165 on the first ratchet 161a, the first winding reel 161 can only rotate in the direction of winding the first pull wire B.

[0063] Combination Figure 7 As shown, the second reeling knob 164 is connected to a second ratchet 162a, and the handle housing 11 is provided with a second pawl 166 that cooperates with the second ratchet 162a. Through the cooperation of the second pawl 166 and the second ratchet 162a, the second reeling knob 164 can only operate the second winding reel 162 to rotate in the direction of winding the second pull cable C. This design reduces the probability of the second pull cable C becoming slack and causing winding, by utilizing the cooperation of the second pawl 166 and the second ratchet 162a. The one-way anti-rotation principle of the second pawl 166 on the second ratchet 162a can be referred to the one-way anti-rotation principle of the first pawl 165 on the first ratchet 161a, and will not be elaborated here.

[0064] It should be noted that, in combination Figure 4 As shown, the wire release mechanism 16 includes both a cooperating first pawl 165 and a first ratchet 161a, and a cooperating second pawl 166 and a second ratchet 162a. Thus, the first pawl 165 and the second pawl 166 can respectively prevent the first ratchet 161a and the second ratchet 162a from rotating in one direction, ensuring that the first wire release knob 163 and the second wire release knob 164 can only operate the corresponding first winding reel 161 and the second winding reel 162 to wind the first pull wire B and the second pull wire C, thereby reducing the probability of the first pull wire B and the second pull wire C becoming slack and tangling.

[0065] Furthermore, the first winding reel 161 and the second winding reel 162 wind the first pull wire B and the second pull wire C in opposite directions. For example, if the rotation direction of the first winding reel 161 when winding the first pull wire B is defined as the forward rotation direction, then the second winding reel 162 winds the second pull wire C when rotating in reverse. This setting avoids accidentally triggering the rotation of the second winding reel 162 while operating the first winding reel 161, which could cause improper winding of the second pull wire C. For example, after the first pull wire B releases its restraint on the implant W, the release position may be inaccurate, requiring re-restraining the implant W and adjusting it to the appropriate release position. If the second winding reel 162 is accidentally triggered while operating the first winding reel 161, the second pull wire C will move the limiting pin D proximally, causing the limiting pin D to release its restraint on the first pull wire B, thus preventing the first pull wire B from restraining the implant W again. In this embodiment, the first winding reel 161 and the second winding reel 162 wind the first pull wire B and the second pull wire C in opposite directions. This avoids accidentally rotating the second winding reel 162 when the first winding reel 161 is rotated, thereby reducing the probability of the second pull wire C being improperly wound. If the release position of the implant W is inaccurate, the first pull wire B can be used to re-tether the implant W, thus adjusting the position of the implant W and improving the accuracy of its release.

[0066] The structure of the first operation unit 14 and the second operation unit 15 will be described below as an example.

[0067] Combination Figure 11 As shown, the first operating part 14 includes a guide tube 141, a transmission component 142, and a first knob 143. The guide tube 141 is connected to the handle housing 11. The transmission component 142 can move axially within the guide tube 141 and is circumferentially limited within the guide tube 141. The first knob 143 is rotatably sleeved on the outer periphery of the guide tube 141 and is axially limited within the guide tube 141. The first knob 143 and the transmission component 142 are threadedly engaged. When the first knob 143 rotates around the guide tube 141, the transmission component 142 moves axially relative to the guide tube 141 under the threaded transmission of the first knob 143. Based on this, when the transmission component 142 is connected to the middle tube 22, the transmission component 142 can drive the middle tube 22 to move axially relative to the guide tube 141. Since the guide tube 141 is connected to the handle housing 11, and the inner tube 21 is connected to the handle housing 11, the axial movement of the middle tube 22 relative to the inner tube 21 is realized.

[0068] Combination Figure 10 and Figure 12As shown, the second operating part 15 includes a connecting pipe 151, a linkage 152, and a second knob 153. The connecting pipe 151 is fixed relative to the handle housing 11. The connecting pipe 151 is provided with a limiting groove 151a extending along its axial direction. The linkage 152 is slidably engaged with the limiting groove 151a. The second knob 153 is axially limited by the linkage 152. The second knob 153 is sleeved outside the connecting pipe 151 and can move axially relative to the connecting pipe 151 to drive the linkage 152 to move along the limiting groove 151a. Based on this, when the linkage 152 is connected to the outer pipe 23, the linkage 152 can be used to drive the outer pipe 23 to move axially relative to the guide pipe 141. Since the guide pipe 141 is connected to the handle housing 11, and the inner pipe 21 is connected to the handle housing 11, the outer pipe 23 can move axially relative to the inner pipe 21.

[0069] It should be noted that the outer tube 23 and the linkage 152 can be connected by glue, or they can be fixed to each other by plug-in, threaded or snap-fit. The connection method between the outer tube 23 and the linkage 152 is not limited here.

[0070] Furthermore, combined Figure 13 and Figure 14 As shown, the second knob 153 can rotate circumferentially relative to the linkage 152, and the second knob 153 can rotate relative to the connecting pipe 151. The second knob 153 is movably connected to a pressing member 154, which has a threaded engagement portion 154a. The connecting pipe 151 has an external thread. The pressing member 154 can move relative to the second knob 153 to a first state or a second state. In the first state, the threaded engagement portion 154a engages with the external thread so that when the second knob 153 rotates relative to the connecting pipe 151, the pressing member 154 drives the second knob 153 to move axially relative to the connecting pipe 151. In the second state, the threaded engagement portion 154a disengages from the external thread.

[0071] In the first state, the threaded engagement part 154a is threadedly connected to the connecting tube 151. Therefore, in this state, the second knob 153 can be accurately moved axially along the connecting tube 151 by rotating it relative to the connecting tube 151, thus improving the axial movement accuracy of the outer tube 23. In the second state, the threaded engagement part 154a is disengaged from the connecting tube 151. At this time, the second knob 153 can be quickly operated to move axially relative to the connecting tube 151, thereby quickly moving the outer tube 23 axially relative to the handle housing 11 to the appropriate position, improving operational efficiency. For example, in the second state, when moving the outer tube 23 proximally relative to the middle tube 22 to remove the implant from the distal end of the outer tube 23, the implant can be quickly removed.

[0072] It should be noted that the pressing component 154 can be configured as a button structure, thereby switching between the first and second states by pressing.

[0073] Furthermore, continue to combine Figure 13 and Figure 14 As shown, a first spring 155 is provided between the pressing member 154 and the second knob 153. The first spring 155 is used to drive the pressing member 154 to reset from the first state to the second state. The pressing member 154 passes through the second knob 153 in a direction perpendicular to the connecting tube 151. The pressing member 154 has a limiting part 154b. The second knob 153 is provided with a locking member 156. The locking member 156 is used to cooperate with the limiting part 154b to limit the pressing member 154 to the first state. The locking member 156 can be in a locked position and an unlocked position relative to the second knob 153. The locking member 156 reciprocates between the two positions. When the locking member 156 is in the locked position, it abuts against the limiting part 154b, causing the threaded part 154a to maintain a threaded engagement with the external thread. When the locking member 156 is in the unlocked position, it releases the limiting part 154b, causing the pressing member 154 to reset to the second state under the drive of the first spring 155. A second spring 157 is provided between the locking member 156 and the second knob 153. The second spring 157 is used to drive the locking member 156 to reset towards the locked position.

[0074] When the pressing member 154 is pressed, it compresses the first spring 155, causing the threaded engagement portion 154a of the pressing member 154 to engage with the threaded connection of the connecting tube 151. The second spring 157 drives the locking member 156 to move towards the locked position, causing the locking member 156 to limit the limiting portion 154b of the pressing member 154, preventing the pressing member 154 from leaving the connecting tube 151 under the elastic force of the first spring 155, thereby keeping the threaded engagement portion 154a in the state of engaging with the connecting tube 151. At this time, simply rotate the second knob 153 relative to the connecting tube 151, so that the second knob 153 and the pressing member 154 rotate together around the connecting tube 151. Under the threaded transmission action between the threaded mating part 154a and the connecting tube 151, the pressing member 154 moves axially relative to the connecting tube 151 along with the second knob 153. In this way, the linkage member 152, which is axially limited with the second knob 153, can drive the outer tube 23 to move axially together.

[0075] Combination Figure 13As shown, when it is necessary to quickly adjust the axial position of the outer tube 23 relative to the handle housing 11, it is only necessary to operate the locking member 156 to overcome the elastic force of the second spring 157 acting on the locking member 156, and move the locking member 156 from the locked position. This allows the locking member 156 to release its restriction on the limiting part 154b, thereby causing the pressing member 154 to reset and move to the second state under the drive of the first spring 155, that is, the threaded engagement part 154a is released from the threaded engagement with the connecting tube 151. At this time, since there is no threaded engagement between the threaded engagement part 154a and the connecting tube 151, the second knob 153 can be operated to quickly move axially relative to the connecting tube 151, thus making the adjustment of the axial position of the outer tube 23 relative to the handle housing 11 faster.

[0076] It should be noted that, since both the first operating part 14 and the second operating part 15 can operate the corresponding pipe fittings to move axially, in some embodiments, the structure of the first operating part 14 can be the same as that of the second operating part 15. Specifically, the method by which the middle pipe 22 moves axially relative to the inner pipe 21 is the same as the method by which the outer pipe 23 moves axially relative to the inner pipe 21.

[0077] See again Figure 3 The handle housing 11 has a second side cavity 11b that communicates with the main cavity 11a. The direction in which the second side cavity 11b extends proximally is at an acute angle to the direction in which the main cavity 11a extends proximally. The main cavity 11a is provided with an inner tube 21, which is connected to the handle housing 11. The distal end of the inner tube 21 extends from the main cavity 11a into the handle housing 11.

[0078] The control handle 10 also includes a bending control mechanism 12, at least partially located within the second side cavity 11b. The bending control mechanism 12 is configured to apply traction to the distal end of the inner tube 21 via the bending control line A, causing the inner tube 21 to bend. In this embodiment, because the bending control mechanism 12 is located within the second side cavity 11b, which communicates with the main cavity 11a of the handle housing 11, the bending operation is simple, less prone to misoperation, and does not increase the overall length of the control handle 10. Furthermore, since the bending control mechanism 12 is configured to apply traction to the distal end of the inner tube 21 via the bending control line A, it maintains a good bending control effect while avoiding the impact on the loading, delivery, and release of the implant by the outer tube 23 when traction is applied in related technologies, thus effectively reducing surgical risks.

[0079] It should be noted that, since the middle tube 22 and the outer tube 23 are sleeved on the inner tube 21, when the bending control mechanism 12 performs a bending operation on the inner tube 21 to make the inner tube 21 bend, the tubes such as the middle tube 22 and the outer tube 23 sleeved on the inner tube 21 will also bend along with it, so as to adjust the advancement direction of the catheter assembly 20 in the body, so that the catheter assembly 20 adapts to the bending of the blood vessel during the process of entering the body, thereby reducing damage to the blood vessel wall.

[0080] The second side cavity 11b and the first side cavity 11c are located on opposite sides of the main cavity 11a. With this structural arrangement, the spatial layout of the control handle 10 is reasonable and the operation is convenient.

[0081] Continue to combine Figure 3 As shown, the handle housing 11 is connected to a second guide assembly 13. The second guide assembly 13 is configured such that when the bending control mechanism 12 pulls the inner tube 21 via the bending control line A, the second guide assembly 13 tensions the bending control line A and guides the bending control line A to move along the tensioning direction, thereby reducing the probability of the bending control line A becoming tangled inside the handle housing 11 and effectively improving the operational reliability of the bending control mechanism 12.

[0082] Furthermore, the second guide assembly 13 includes a first roller 13a and a second roller 13b, both of which are rotatably connected to the handle housing 11. A wire passage gap is formed between the first roller 13a and the second roller 13b, which is used for the control bend line A to pass through.

[0083] It should be noted that, in the embodiments of the present invention, the guide wheel and the roller can be the same or similar wheels, or they can be different types of wheels. Specifically, they can be metal wheels or plastic wheels, and there is no limitation here.

[0084] Combination Figure 3 and Figure 8As shown, the bending control mechanism 12 includes a guide member 121, a traction member 122, a drive member 123, and a bending control knob 124. The guide member 121 is fixedly connected to the handle housing 11 and extends along the second side cavity 11b. The traction member 122 is connected to the bending control line A and can move linearly along the guide member 121. The drive member 123 can rotate within the second side cavity 11b and is axially confined within the second side cavity 11b. The drive member 123 is configured to drive the traction member 122 to move along the guide member 121 when rotating. The bending control knob 124 is connected to the drive member 123 and is used to drive the drive member 123 to rotate. When using the bending control mechanism 12 to perform a bending operation on the inner tube 21, the bending control knob 124 can be rotated to drive the drive member 123 to rotate, thereby the drive member 123 drives the traction member 122 to move linearly along the guide member 121. Since the bending control line A connects the distal end of the inner tube 21 to the traction member 122, when the traction member 122 moves linearly along the guide member 121, it will pull the distal end of the inner tube 21 via the bending control line A, causing the distal end of the inner tube 21 to bend. Specifically, when the traction member 122 moves towards the proximal end along the guide member 121, the bending control line A will pull the distal end of the inner tube 21 towards the proximal end, thereby gradually increasing the degree of bending. Correspondingly, when the bending control knob 124 is rotated in the opposite direction to move the traction member 122 towards the distal end along the guide member 121, the traction force of the bending control line A on the distal end of the inner tube 21 gradually decreases, thereby gradually weakening the degree of bending of the inner tube 21. Thus, the bending control mechanism 12 achieves precise bending control of the inner tube 21. It should be noted that the connection between the bending control line A and the inner tube 21 includes, but is not limited to, locking with a set screw, or the inner tube 21 being connected to the bending control line A by thermoplastic molding. The connection between the traction element 122 and the bending control line A includes, but is not limited to, glue connection or connection by screws. In some embodiments, the bending control line A can be tied to the traction element 122 by knotting. How the bending control line A is connected to the inner tube 21 and the traction element 122 will not be described in detail here.

[0085] In some embodiments, the traction member 122 is annular and sleeved on the outside of the guide member 121, with the traction member 122 circumferentially confined to the guide member 121. In this embodiment, the traction member 122 is sleeved with the guide member 121, which facilitates assembly and provides good stability of movement of the traction member 122 along the guide member 121.

[0086] It should be noted that there are multiple possibilities for the structure in the bending control mechanism 12 that enables the driving member 123 to rotate and drive the traction member 122 to move along the guide member 121.

[0087] For example, such as Figure 8As shown, the guide member 121 has a guide groove 121a extending along its axial direction. The drive member 123 is tubular and sleeved on the outside of the guide member 121. The inner wall of the drive member 123 is provided with an internal thread. The traction member 122 is slidably engaged with the guide groove 121a and engages with the internal thread. When the drive member 123 rotates, the drive member 123 drives the traction member 122 to move along the guide groove 121a via the thread. In this embodiment, the guide member 121 can be tubular or a solid cylinder, and is not limited here. Wherein, when the guide member 121 is tubular, the guide groove 121a can be a through groove that radially penetrates the side wall of the guide member 121, or it can be a blind groove that does not penetrate the inner wall of the guide member 121.

[0088] For example, combining Figure 9 As shown, in some embodiments, the guide member 121 is tubular and has a guide groove 121a extending along its axial direction, and the drive member 123 is rotatably inserted into the guide member 121. It should be noted that the drive member 123 can be a hollow tube or a solid cylinder. In this embodiment, the drive member 123 has an external thread, and the traction member 122 slides in connection with the guide groove 121a. The traction member 122 engages with the external thread, and when the drive member 123 rotates, the threaded drive member 123 drives the traction member 122 to move along the guide groove 121a.

[0089] In the above embodiment, since the driving member 123 moves along the guide groove 121a via the threaded drive traction member 122, the traction member 122 pulls the far end of the inner tube 21 via the bending control line A. The threaded drive method itself not only has high control precision, but also can achieve self-locking. Thus, when the bending control knob 124 is not rotated, the driving member 123 will not rotate due to the self-locking effect of the thread to avoid displacement of the traction member 122, which effectively improves the reliability and stability of the precise bending operation of the inner tube 21.

[0090] Understandably, the guide member 121 can not only adopt the above-mentioned method of slotting to form the guide groove 121a to guide the traction member 122 to perform linear movement, but also, in other embodiments, the guide groove 121a can be replaced by a guide protrusion, which provides a circumferential upper limit for the traction member 122 and guides the traction member 122 to move axially. The structure of the guide member 121 will not be described in detail here.

[0091] See again Figure 1 As shown, the control handle 10 also includes a front housing 10a, which is connected to the far end of the second operating part 15, making it convenient for the operator to hold and use the control handle 10.

[0092] The distal end of the front housing 10a can be connected to the stabilizing tube 24. The stabilizing tube 24 is sleeved on the outside of the conduit assembly 20, which provides stable support for the conduit assembly 20 and improves the stability of the conduit assembly 20.

[0093] It should be noted that, in the embodiments of the present invention, a venting assembly is provided at the proximal end of each pipe fitting. For example, in conjunction with... Figure 1 and Figure 2 As shown, the pipes in the conveying system 100 include an inner pipe 21 and a middle pipe 22, an outer pipe 23, and a stabilizing pipe 24 sequentially sleeved outside the inner pipe 21. The connection relationship of these pipes is not described in detail here. The conveying system 100 includes four venting components, specifically a first venting component 21a, a second venting component 22a, a third venting component 23a, and a fourth venting component 24a, which correspond to the four pipes, namely the inner pipe 21, the middle pipe 22, the outer pipe 23, and the stabilizing pipe 24, respectively. This allows the venting components to vent these pipes, preventing air from entering the system and causing adverse effects.

[0094] It should be noted that, in the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0095] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0096] In this invention, unless otherwise explicitly specified and limited, the first feature being "on" or "below" the second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A control handle characterized by, include: The handle housing has a main cavity and a side cavity communicating with the main cavity, wherein the direction in which the side cavity extends proximally forms an acute angle with the direction in which the main cavity extends proximally; A suture removal mechanism, at least partially located within the side cavity, is configured to wind up a first pull wire and a second pull wire. One end of the first pull wire is connected to the suture removal mechanism, and the other end is connected to the implant. One end of the second pull wire is connected to the suture removal mechanism, and the other end is connected to a limiting pin. The first pull wire is configured to exert a binding force on the implant radially under the constraint of the limiting pin, and when the limiting pin is removed, the first pull wire releases the radial constraint on the implant. The second pull wire is configured to pull the limiting pin proximally relative to the implant to remove the limiting pin.

2. The control handle of claim 1, wherein, The wire release mechanism includes a first winding reel, a second winding reel, a first wire release knob, and a second wire release knob. Both the first winding reel and the second winding reel are rotatably connected to the handle housing. The first wire release knob is connected to the first winding reel, and the second wire release knob is connected to the second winding reel. The first wire release knob and the second wire release knob are configured to operate the first winding reel and the second winding reel to rotate relative to the handle housing, so that the first winding reel and the second winding reel respectively wind up the first pull wire and the second pull wire.

3. The control handle of claim 2, wherein, The first retraction knob is connected to a first ratchet, and the handle housing is provided with a first pawl that cooperates with the first ratchet. Through the cooperation of the first pawl and the first ratchet, the first retraction knob can only operate the first winding reel to rotate in the direction of winding the first pull wire. And / or, the second retraction knob is connected to a second ratchet, and the handle housing is provided with a second pawl that cooperates with the second ratchet. Through the cooperation between the second pawl and the second ratchet, the second retraction knob can only operate the second winding reel to rotate in the direction of winding the second pull wire.

4. Control handle according to claim 2 or 3, characterized in that The first winding reel and the second winding reel are coaxially arranged.

5. The control handle of claim 2, wherein, The handle housing is connected to a guide assembly, which is configured to tension the first and second pull wires and guide them to move along the tensioning direction when the first winding reel and the second winding reel respectively wind up the first pull wire and the second pull wire.

6. The control handle of claim 5, wherein, The guiding assembly includes a first guide wheel, a second guide wheel, and a third guide wheel. The first guide wheel, the second guide wheel, and the third guide wheel are all rotatably connected to the handle housing. A first wire passage gap is formed between the first guide wheel and the second guide wheel for the first pull cable to pass through. A second wire passage gap is formed between the second guide wheel and the third guide wheel for the first pull cable to pass through.

7. The control handle according to claim 1, characterized in that, The control handle includes a first operating part and a second operating part connected to the handle housing. The first operating part is configured to operate the middle tube, which is sleeved outside the inner tube, to move axially relative to the inner tube. The second operating part is configured to operate the outer tube, which is sleeved outside the middle tube, to move axially relative to the middle tube. A receiving cavity is formed between the middle tube and the outer tube. The receiving cavity is configured to receive an implant. The distal end of the middle tube is detachably connected to the implant via the first pull wire. When the outer tube moves proximally relative to the middle tube, the implant moves out of the receiving cavity from the distal end of the outer tube.

8. The control handle of claim 7, wherein, The structure of the first operating unit is the same as that of the second operating unit.

9. Control handle according to claim 7 or 8, characterized in that The first operating part includes a guide tube, a transmission component, and a first knob. The guide tube is connected to the handle housing. The transmission component can move axially within the guide tube and is circumferentially limited within the guide tube. The first knob is rotatably sleeved on the outer periphery of the guide tube and is axially limited within the guide tube. The first knob is threadedly engaged with the transmission component. When the first knob rotates around the guide tube, the transmission component moves axially relative to the guide tube under the threaded transmission of the first knob.

10. Control handle according to claim 7 or 8, characterized in that The second operating part includes a connecting tube, a linkage member, and a first knob. The connecting tube is fixed relative to the handle housing. The connecting tube is provided with a limiting groove extending along its axial direction. The linkage member is slidably engaged with the limiting groove. The first knob is axially limited by the linkage member. The first knob is sleeved outside the connecting tube and can move axially relative to the connecting tube to drive the linkage member to move along the limiting groove.

11. The control handle of claim 10, wherein, The first knob is circumferentially rotatable relative to the linkage member and rotatable relative to the connecting pipe. The first knob is movably connected to a transmission member, which has a threaded engagement portion. The connecting pipe has an external thread. The transmission member is movable relative to the first knob to a first state or a second state. In the first state, the threaded engagement portion engages with the external thread so that when the first knob rotates relative to the connecting pipe, the transmission member drives the first knob to move axially relative to the connecting pipe. In the second state, the threaded engagement portion disengages from the external thread.

12. The control handle according to claim 11, characterized in that, A first spring is provided between the transmission component and the first knob. The first spring is used to drive the transmission component to reset from a first state to a second state. The transmission component passes through the first knob in a direction perpendicular to the connecting pipe. The transmission component has a limiting part. The first knob has a locking member. The locking member is used to cooperate with the limiting part to limit the transmission component to the first state. The locking member can reciprocate between the locked position and the unlocked position relative to the first knob. When the locking member is in the locked position, the locking member abuts against the limiting part and makes the threaded part maintain thread engagement with the external thread. When the locking member is in the unlocked position, the locking member releases the limiting part, so that the transmission component resets to the second state under the drive of the first spring. A second spring is provided between the locking member and the first knob. The second spring is used to drive the locking member to reset towards the locked position.

13. A delivery system characterized by, Includes the control handle as described in any one of claims 1-12.

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