A handle for delivering an implant and a delivery system thereof

Abstract

The present invention discloses a handle for conveying an implant and a conveying system thereof, wherein the handle comprises a hand-held sleeve and a rotating sleeve, wherein the hand-held sleeve and the rotating sleeve are coaxially arranged and have a through cavity, wherein the distal end of the hand-held sleeve and the proximal end of the rotating sleeve are circumferentially movably connected; a shifting member, wherein part of the shifting member is arranged in the through cavity of the hand-held sleeve and the rotating sleeve, wherein the shifting member is used to control the conveying speed of the implant to switch between a first gear and a second gear; and a conveying system comprises a handle, an inner tube assembly and a conveying outer tube, wherein the proximal end of the conveying outer tube is fixed at the distal end of the shifting member, and the inner tube assembly passes through the conveying outer tube, the rotating sleeve and the cavity in the hand-held sleeve. The handle and the conveying system provided by the present invention use a two-stage speed regulating structure, which can achieve both more precise positioning control and rapid withdrawal of the sheath.

Description

Technical Field

[0001] The invention relates to a handle and a delivery system, in particular to a handle for delivering an implant and a delivery system thereof. Background Art

[0002] With the development of social economy and the aging of population, the incidence of valvular heart disease has increased significantly. Studies have shown that the incidence of valvular heart disease in the elderly population over 75 years old is as high as 13.3%. At present, traditional surgical treatment is still the first choice for patients with severe valvular disease. However, for the elderly, patients with multiple organ diseases, patients with a history of open-chest surgery, and patients with poor heart function, traditional surgical treatment has high risks and mortality rates. Some patients do not even have the opportunity for surgery. Transcatheter heart valve surgery has the advantages of no need for open-chest surgery, less trauma, and faster patient recovery, and has received widespread attention from experts and scholars.

[0003] The implantation of heart valves requires the help of a delivery system. According to clinical needs, when loading the valve component before surgery, it is hoped that the handle can achieve rapid withdrawal and slow advancement of the sheath to improve loading efficiency and ensure the success rate of loading; during the implantation of the valve component, the sheath should be withdrawn as slowly as possible to find the positioning point, and the sheath release speed should be accelerated in the middle to reduce the low pressure time of the heart; during the recovery of the valve component, the faster the speed, the higher the efficiency and the more beneficial it is to the surgery, that is, the faster the sheath advances, the better.

[0004] In the prior art, when releasing or retrieving the valve assembly, the handle has only one control knob in the same direction, that is, the release or retrieving is performed at the same speed, which makes it difficult for the operator to control the speed and position, resulting in large positioning errors and low surgical efficiency. Therefore, it is necessary to develop a handle that can achieve different speeds of operation at different stages of the operation. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a handle for delivering an implant and a delivery system thereof, which can switch the fast or slow operation speed of the handle according to the requirements for the handle operation speed at different stages of the operation.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a handle for delivering an implant, comprising: a hand-held sleeve and a rotating sleeve, the hand-held sleeve and the rotating sleeve are coaxially arranged, and the hand-held sleeve and the rotating sleeve have a through cavity, the distal end of the hand-held sleeve and the proximal end of the rotating sleeve are movably connected in the circumferential direction; a shift component, part of which is arranged in the through cavity of the hand-held sleeve and the rotating sleeve, and the shift component is used to control the delivery speed of the implant to switch between a first gear and a second gear.

[0007] Preferably, the distal end of the hand-held sleeve has a first connecting end, the proximal end of the rotating sleeve has a second connecting end, the first connecting end is a circumferential protrusion, the second connecting end is a circumferential groove, and the first connecting end is adapted to the second connecting end.

[0008] Preferably, the shift component includes a double-threaded screw, an engaging lever and a switching switch, the double-threaded screw includes a first thread segment and a second thread segment, the first thread segment and the second thread segment have different pitches, the engaging lever has a first pitch protrusion and a second pitch protrusion, the switching switch and the engaging lever are in contact, and the switching switch can move axially along the rotating sleeve so that the first pitch protrusion of the engaging lever engages with the first thread segment of the double-threaded screw, and the second pitch protrusion of the engaging lever engages with the second thread segment of the double-threaded screw.

[0009] Preferably, the hand-held sleeve comprises an outer hand-held sleeve and an inner guide column located inside the outer hand-held sleeve, and the proximal end of the double-threaded screw is sleeved outside the inner guide column.

[0010] Preferably, the double-threaded screw has an inner guide groove, and the cross section of the inner guide groove matches the shape of the cross section of the inner guide column.

[0011] Preferably, the rotating sleeve comprises a rotating outer cylinder, and the double-threaded screw passes through the rotating outer cylinder and contacts with an inner wall of the rotating outer cylinder.

[0012] Preferably, an axial groove is provided on the surface of the rotating sleeve, the engaging lever and the switching switch are arranged between the double-threaded screw and the axial groove, and the axial length of the axial groove is smaller than the axial length of the switching switch.

[0013] Preferably, the inner wall of the rotating sleeve is relatively provided with a first mounting hole and a second mounting hole, the axes of the first mounting hole and the second mounting hole are perpendicular to the axis of the rotating sleeve, a mounting shaft is arranged in the first mounting hole and the second mounting hole, the engaging lever is arranged on the mounting shaft, and the engaging lever can rotate around the mounting shaft.

[0014] Preferably, the switch has a first end, a second end and a toggle button, the first end and the second end of the switch are in contact with the surface of the engagement lever, and the toggle button of the switch extends from the axial slot and is exposed on the rotating sleeve.

[0015] Preferably, the engagement lever has a first side and a second side that are opposite to each other in the axial direction, and the cross-sectional shape of the first side and the second side of the engagement lever on a plane perpendicular to the axis of the installation shaft is an arc shape.

[0016] Preferably, an elastic element is provided between the mounting shaft and the first mounting hole and / or the second mounting hole.

[0017] Another technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a delivery system for delivering implants, including the above-mentioned handle, inner tube assembly and delivery outer tube, the inner tube assembly includes a delivery inner tube, the proximal end of the delivery outer tube is fixed to the distal end of the shift member, the inner tube assembly passes through the cavity in the rotating sleeve and the hand-held sleeve, the hand-held sleeve includes an outer hand-held tube and an inner guide column located inside the outer hand-held tube, and the proximal end of the delivery inner tube is fixedly connected to the inner surface of the inner guide column on the hand-held sleeve.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the handle for conveying an implant and the conveying system thereof provided by the present invention have a shifting member, which is used to control the conveying speed of the implant to switch between a first gear and a second gear, so as to realize fast and slow switching. Specifically, the fast end of the switching switch contacts the upper surface of the large pitch side of the engagement lever, so that the large pitch protrusion contacts and engages with the large pitch thread on the double-threaded screw rod, ensuring that the rotating sleeve rotates one circle with a larger speed and displacement, thereby realizing fast movement of the conveying outer tube; the slow end of the switching switch contacts the upper surface of the small pitch side of the engagement lever, so that the small pitch protrusion contacts and engages with the small pitch thread, ensuring that the displacement of the rotating sleeve rotates one circle is smaller, thereby realizing slow movement of the conveying outer tube, and at the same time, the small pitch protrusion converts the circumferential rotation of the rotating sleeve into the linear displacement of the conveying outer tube with higher accuracy, which can realize more precise positioning control. In addition, during rapid movement, the small pitch protrusion separates from the small pitch thread, and during slow movement, the large pitch protrusion separates from the large pitch thread. There is always only one thread mating, which avoids mutual interference between rapid and slow movements and improves the accuracy of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a partial cross-sectional schematic diagram of a delivery system for delivering an implant in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the overall structure of a handle for delivering an implant in an embodiment of the present invention;

[0021] Figure 3a It is a longitudinal cross-sectional schematic diagram of a hand-held sleeve of a handle for delivering an implant in an embodiment of the present invention;

[0022] Figure 3b is a cross-sectional schematic diagram of a handheld sleeve of a handle for delivering an implant in an embodiment of the present invention;

[0023] Figure 4aIt is a longitudinal cross-sectional schematic diagram of a rotating sleeve of a handle for delivering an implant in an embodiment of the present invention;

[0024] Figure 4b is a schematic cross-sectional view of a rotating sleeve of a handle for delivering an implant in an embodiment of the present invention;

[0025] Figure 5 It is a schematic diagram of a front view of an engagement lever of a handle for delivering an implant in an embodiment of the present invention;

[0026] Figure 6 A schematic top view of an engagement lever of a handle for delivering an implant in an embodiment of the present invention;

[0027] Figure 7 It is a partially enlarged schematic diagram of an engagement lever of a handle for delivering an implant in an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a switch of a handle for delivering an implant in an embodiment of the present invention;

[0029] Figure 9a It is a front view of a double-threaded screw of a handle for delivering an implant in an embodiment of the present invention;

[0030] Figure 9b A side view of a double-threaded screw of a handle for delivering an implant in an embodiment of the present invention;

[0031] Fig.10 is a cross-sectional schematic diagram of a delivery system for delivering an implant in an embodiment of the present invention;

[0032] Fig.11 It is a partially enlarged schematic diagram of a delivery system for delivering an implant in an embodiment of the present invention.

[0033] In the figure:

[0034] DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] In the following description, in order to provide a thorough understanding of the present invention, many specific details are set forth. However, it will be apparent to one of ordinary skill in the art that the present invention can be practiced without these specific details. Therefore, the specific details set forth are merely exemplary, and the specific details may vary by the spirit and scope of the invention and still be considered to be within the spirit and scope of the invention.

[0037] The handle and delivery system for delivering implants provided in this embodiment are mainly used for delivering implants, such as valve components. The handle and delivery system for delivering implants are provided with a shifting member for controlling the delivery speed of the implant to switch between the first gear and the second gear. When the speed is fast, the small pitch protrusion is separated from the small pitch thread, and when the speed is slow, the large pitch protrusion is separated from the large pitch thread. There is always only one thread matching, which is simple to operate, can avoid mutual interference between fast and slow movements, and improve the accuracy of operation.

[0038] In order to more clearly describe the structural features of the present invention, "proximal end" and "distal end" are used as directional words, wherein "proximal end" refers to the end close to the operator during the operation; "distal end" refers to the end far away from the operator. The term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0039] See also Figure 1 and Figure 2 The handle for delivering the implant includes a hand-held sleeve 1 and a rotating sleeve 2, the hand-held sleeve 1 and the rotating sleeve 2 are coaxially arranged, and the hand-held sleeve 1 and the rotating sleeve 2 have a through cavity, and the distal end of the hand-held sleeve 1 and the proximal end of the rotating sleeve 2 are movably connected in the circumferential direction.

[0040] The handle for delivering the implant also includes a shifting member, part of which is disposed in the through cavity of the hand-held sleeve 1 and the rotating sleeve 2, and the shifting member is used to control the delivery speed of the implant to switch between a first gear and a second gear. In a specific embodiment, the shifting member includes a double-threaded screw 5, an engagement lever 3, and a switching switch 4.

[0041] See also Figure 1 , Figure 3a and Figure 3b The hand-held sleeve 1 includes an outer hand-held sleeve 11 and an inner guide column 12. The outer hand-held sleeve 11 is located outside the hand-held sleeve 1. The operator can hold the outer hand-held sleeve 11 to operate the handle. In order to facilitate operation, the surface of the outer hand-held sleeve 11 can be made of frosted material or provided with ribs, waves, etc. to increase friction and optimize the operating feel. This embodiment does not impose any special restrictions on this. The inner guide column 12 is located inside the hand-held sleeve 1. The inner guide column 12 and the outer hand-held sleeve 11 are coaxially arranged. The proximal ends of the outer hand-held sleeve 11 and the inner guide column 12 are closed and connected, and the proximal end of the double-threaded screw 5 is sleeved outside the inner guide column 12.

[0042] See also Figure 1 , Figure 4a and Figure 4bThe rotating sleeve 2 includes a rotating outer cylinder 21, an axial slot 23, a second connecting end 24 and a mounting hole 25. The surface of the rotating outer cylinder 21 can be made of frosted material or provided with ribs, waves, etc. to increase friction and optimize the operating feel. This embodiment has no particular restrictions on this. The interior of the rotating sleeve 2 is a through cavity. The inner wall of the rotating outer cylinder 21 is the cavity wall 22. The double-threaded screw 5 passes through the rotating outer cylinder 21 and contacts the cavity wall 22. The cavity wall 22 provides support and guidance for the double-threaded screw 5. The inner guide column 12 and the cavity wall 22 limit the five degrees of freedom of the double-threaded screw 5. The double-threaded screw 5 can only move axially along the cavity wall 22 and the inner guide column 12. Furthermore, the distal end of the hand-held sleeve 1 has a first connection end 111, and the proximal end of the rotating sleeve 2 has a second connection end 24. The first connection end 111 is circumferentially movably connected to the second connection end 24 and limits the freedom of movement of the rotating sleeve 2 in five directions, so that the rotating sleeve 2 has only one degree of freedom of circumferential movement and can only move along the circumferential direction. In a specific embodiment, the first connection end 111 is a circumferential protrusion, and the second connection end 24 is a circumferential groove; the first connection end 111 and the second connection end 24 are adapted, and the first connection end 111 is inserted into the circumferential groove, so that the rotating sleeve 2 can only rotate along the circumferential direction. In this embodiment, the circumferential protrusion includes a circumferentially continuous protrusion and a circumferentially discontinuous protrusion. Similarly, the circumferential groove includes a circumferentially continuous groove and a circumferentially discontinuous groove. Therefore, the first connecting end 111 and the second connecting end 24 can have a variety of different matching structures. Preferably, the first connecting end 111 is a circumferentially continuous circumferential protrusion, and the second connecting end 24 is a circumferentially continuous groove. In other embodiments, the first connecting end 111 is a circumferentially continuous circumferential protrusion, and the second connecting end 24 is a circumferentially discontinuous groove. Or the first connecting end 111 is a circumferentially discontinuous circumferential protrusion, and the second connecting end 24 is a circumferentially continuous groove. It is sufficient to ensure that the rotating sleeve 2 can rotate circumferentially relative to the hand-held sleeve 1.

[0043] Please continue to see Figure 1 , Figure 4a and Figure 4b The surface of the rotating sleeve 2 is provided with an axial slot 23, and a cavity penetrating the axial slot 23 is formed between the axial slot 23 and the double-threaded screw rod 5. The engaging lever 3 and the switching switch 4 are installed in the cavity, and a movement space is provided for the engaging lever 3 and the switching switch 4. The length of the cavity in the axial direction is greater than the length of the engaging lever 3, and the width is greater than the width of the switching switch 4, so as to ensure that the engaging lever 3 and the switching switch 4 have sufficient installation and movement space. Preferably, the length of the axial slot 23 in the axial direction is less than the length of the switching switch 4 in the axial direction, so as to restrict the switching switch 4 in the axial slot 23.

[0044] See also Figure 4a ,4b and Figure 5 The inner wall of the rotating sleeve 2 is provided with a pair of mounting holes 25, which are respectively a first mounting hole and a second mounting hole. The axes of the first mounting hole and the second mounting hole are perpendicular to the axis of the rotating sleeve 2. A mounting shaft 33 is provided in the first mounting hole and the second mounting hole. The engaging lever 3 is provided on the mounting shaft 33, and the engaging lever 3 can rotate around the mounting shaft 33. The axial length of the mounting hole 25 is greater than the outer diameter of the mounting shaft 33. The mounting hole 25 is preferably a waist-shaped hole so that the mounting shaft 33 can move slightly in the axial direction of the rotating sleeve 2. The mounting hole 25 can also be a hole of other shapes, such as a rectangle, as long as it can accommodate the end of the mounting shaft 33 and leave a small amount of free space in the axial direction to allow the engaging lever 3 to move slightly in the axial direction in the mounting hole 25. In another embodiment, preferably, an elastic element is further provided between the lever mounting shaft 33 and the mounting hole 25. The elastic element may be a spring. Preferably, the elastic element is provided between the end of the mounting shaft 33 and the mounting hole 25, so that when the switching switch 4 switches between fast and slow speeds, the first pitch protrusion 31 (or the second pitch protrusion 35) and the first thread segment 52 (or the second thread segment 53) are more stably and reliably engaged.

[0045] See also Figure 5 and Figure 6 The engaging lever 3 has a first pitch protrusion 31, a first side 32, a second side 34 and a second pitch protrusion 35. The mounting shaft 33 is located at the center of the engaging lever 3, that is, the mounting shaft 33 is arranged in the middle part of the engaging lever 3. The engaging lever 3 is arranged on the mounting shaft 33. The two sides of the mounting shaft 33 are respectively the first side 32 and the second side 34 of the engaging lever 3. The first side 32 is connected to the first pitch protrusion 31, and the second side 34 is connected to the second pitch protrusion 35. Figure 5 The lever axis A of the middle meshing lever 3 is Figure 6 The mounting axis B in the middle is perpendicular to and coplanar with the axis of the rotating sleeve 2, and the first pitch protrusion 31 of the engagement lever 3 and Figure 9a The first thread segment 52 of the double threaded screw rod 5 is engaged and separable, and the second pitch protrusion 35 of the engagement lever 3 and the Figure 9a The threads of the second threaded section 53 of the middle double-threaded screw rod 5 are engaged and separable.

[0046] See also Figure 6 and Figure 7 The cross-sectional shape of the first side 32 and the second side 34 of the engagement lever 3 on a plane perpendicular to the mounting axis B is an arc, as shown in FIG. Figure 7As shown in C. The arc shape can ensure that when the switch 4 is switched, only the first end 41 of the switch contacts the upper surface of the first side 32 of the engagement lever or the second end 43 of the switch contacts the upper surface of the second side 34 of the engagement lever, thereby avoiding interference and jamming caused by simultaneous contact of the two, and ensuring normal switching of fast and slow conveying speeds.

[0047] See also Figure 8 The switch 4 has a first end 41, a second end 43 and a toggle button 42. The toggle button 42 of the switch 4 extends from the axial slot 23 and is exposed to the rotating sleeve 2. In a specific embodiment, the toggle button 42 is disposed in the axial slot 23 of the rotating sleeve 2 and can slide along the axial slot 23 of the rotating sleeve 2, so that the operator can toggle the switch 4 along the axis of the rotating sleeve 2. The toggle button 42 is between the first end 41 and the second end 43. The first end 41 contacts or separates from the upper surface of the first side 32 of the engagement lever, and the second end 43 contacts or separates from the upper surface of the second side 34 of the engagement lever. The toggle button 42 is exposed on the outside of the rotating sleeve 2, so that the operator can directly toggle the switching switch 4 axially outside the rotating sleeve 2 to engage or disengage the threads of the first pitch protrusion 31 of the engaging lever 3 and the first thread segment 52 of the double-threaded screw 5, and to engage or disengage the threads of the second pitch protrusion 35 of the engaging lever 3 and the second thread segment 53 of the double-threaded screw 5.

[0048] See also Figure 9a and 9b The double-threaded screw 5 includes a non-threaded section 51, a first threaded section 52, a second threaded section 53 and an inner guide groove 54. The non-threaded section 51 is arranged at the distal end of the double-threaded screw 5, is coaxially arranged with the conveying outer tube 6, and is fixedly connected to the distal end surface of the conveying outer tube 6. The first threaded section 52 and the second threaded section 53 have different pitches, the first threaded section 52 is engaged with the first pitch protrusion 31 of the engaging lever 3, and the second threaded section 53 is engaged with the second pitch protrusion 35 of the engaging lever 3. The proximal end of the inner guide groove 54 passes through the cavity inside the rotating sleeve 2 and is sleeved on the outside of the inner guide column 12 of the handheld sleeve 1. The inner surface of the inner guide groove 54 matches the shape of the outer surface 122 of the inner guide column 12, as shown in FIG. Figure 3b The cross-sectional shape of the inner guide column 12 shown is similar to Figure 9b The cross-sectional shape of the inner guide groove 54 shown is a regular hexagon, that is, the cross-sectional shape of the inner guide groove 54 is consistent with the cross-sectional shape of the inner guide column 12, so that the inner guide groove 54 can move axially along the inner guide column 12. The cross-sectional shape of the inner guide groove 54 of the double-threaded screw 5 can be a regular polygon or an ellipse, etc., preferably as follows Figure 9bThe regular hexagon shown in the figure does not cause relative circumferential movement when the double-threaded screw 5 cooperates with the inner guide column 12 and the cavity wall 22 in the rotating sleeve 2, that is, the double-threaded screw 5 can only move axially. In one embodiment, the first thread segment 52 is a large thread pitch, and the second thread segment 53 is a small thread pitch, that is, the pitch of the first thread segment 52 is greater than the pitch of the second thread segment 53, and correspondingly, the first pitch convex point 31 is a large pitch convex point, and the second pitch convex point 35 is a small pitch convex point. In another embodiment, the first thread segment 52 and the second thread segment 53, the first pitch convex point 31 and the second pitch convex point 35 can be exchanged according to actual conditions, that is, the first thread segment 52 is a small thread pitch, and the second thread segment 53 is a large thread pitch, that is, the pitch of the first thread segment 52 is less than the pitch of the second thread segment 53, and correspondingly, the first pitch convex point 31 is a small pitch convex point, and the second pitch convex point 35 is a large pitch convex point.

[0049] See also Figure 1 , Figure 5 , Figure 8 , Figure 9a and Figure 9b , when the upper surface of the first side 32 of the engagement lever 3 contacts the lower surface of the first end 41 of the switch 4, the upper surface of the second side 34 of the engagement lever 3 separates from the lower surface of the second end 43 of the switch 4, at which time the first pitch protrusion 31 engages with the first thread segment 52 of the double-threaded screw 5, and the second pitch protrusion 35 separates from the second thread segment 53 of the double-threaded screw 5. When the upper surface of the second side 34 of the engagement lever 3 contacts the lower surface of the second end 43 of the switch 4, the upper surface of the first side 32 of the engagement lever 3 separates from the lower surface of the first end 41 of the switch 4, at which time the second pitch protrusion 35 engages with the second thread segment 53 of the double-threaded screw 5, and the first pitch protrusion 31 separates from the first thread segment 52 of the double-threaded screw 5. Preferably, the distance between the first pitch protrusion 31 and the second pitch protrusion 35 of the engaging lever 3 is greater than the axial length of the first thread segment 52 and greater than the axial length of the second thread segment 53 to ensure that the engaging lever 3 cooperates with the first thread segment 52 and the second thread segment 53 during switching.

[0050] When the handle is in the starting position, the toggle button 42 of the switch 4 is at the distal end or the proximal end. In specific operation, the operator can hold the outer handle sleeve 11 of the hand-held sleeve 1, and when rapid movement is required, the toggle button 42 is toggled toward the rapid side indicated by the outer surface of the rotating sleeve 2, that is, toward the first end 41 of the switch 4. The first end 41 of the switch 4 contacts the upper surface of the first side 32 of the engagement lever 3, so that the engagement lever 3 rotates around the lever mounting shaft 33, and the first pitch protrusion 31 contacts and engages with the thread of the first thread segment 52, and then the rotating sleeve 2 is rotated, and the first pitch protrusion 31 and the rotating sleeve 2 move circumferentially together, and the double-threaded screw 5 can only move axially, so that the double-threaded screw 5 and the outer delivery tube 6 can move axially rapidly. When slow movement is required, the toggle button 42 is toggled toward the slow side indicated by the outer surface of the rotating sleeve 2, that is, toward the second end 43 of the switching switch 4. The second end 43 of the switching switch 4 contacts the upper surface of the second side 34 of the engaging lever 3, so that the engaging lever 3 rotates around the lever mounting shaft 33. At the same time, the lever mounting shaft 33 moves slightly in the axial direction of the rotating sleeve 2 to ensure that the second pitch protrusion 35 is in contact and engaged with the thread of the second thread segment 53. Then, the rotating sleeve 2 is rotated to drive the second pitch protrusion 35 and the rotating sleeve 2 to move circumferentially together. The double-threaded screw 5 can only move axially, thereby realizing the axial slow movement of the double-threaded screw 5 and the conveying outer tube 6.

[0051] See also Fig.10 and Fig.11 The delivery system for delivering the implant includes a handle and a catheter, and the catheter includes an inner tube assembly 7 and a delivery outer tube 6; the inner tube assembly 7, the delivery outer tube 6 and the double-threaded screw 5 are all coaxially arranged, and the delivery outer tube 6 is sleeved outside the inner tube assembly 7. The inner tube assembly 7 includes a delivery inner tube 73, a fixed head 72 and a conical head 71 from the proximal end to the distal end, and the inner tube assembly 7 passes through the inner cavity of the delivery outer tube 6, the double-threaded screw 5, and the inner guide column 12 in sequence. The proximal end surface of the delivery inner tube 73 is fixedly connected to the inner surface of the inner guide column 12 on the handheld sleeve 1, and the fixed position can be any position of the inner surface 121 of the inner guide column 12 in the axial direction, and the two can be connected by bonding or threaded connection; the six degrees of freedom of the fixed head 72 are all restricted to fix and support the implant valve assembly 8. The proximal end of the delivery outer tube 6 is fixedly connected to the non-threaded section 51 of the double-threaded screw 5, and the delivery outer tube 6 can be driven to move axially, but cannot rotate circumferentially. The outer delivery tube 6 can be driven manually to move forward and backward in the axial direction, thereby causing the outer delivery tube 6 to move forward and backward relative to the inner tube assembly 7 to achieve operations such as loading, releasing and recovering the valve assembly 8.

[0052] In specific implementation, the valve assembly 8 is loaded before the operation. At this stage, it is hoped that the handle can realize the rapid withdrawal and slow advancement of the outer delivery tube 6. In this embodiment, the pitch of the first thread segment 52 is greater than the pitch of the second thread segment 53, that is, the first thread segment 52 is a large pitch thread, the first pitch protrusion 31 is a large pitch protrusion, and the first end 41 of the switch 4 is a fast switching end. When loading the valve assembly 8, hold the outer hand-held sleeve 11 of the hand-held sleeve 1, and push the toggle button 42 of the switching switch 4 toward the direction of the first end 41, so that the first pitch protrusion 31 of the engaging lever 3 contacts and engages with the first thread segment 52. Then, rotate the rotating sleeve 2 counterclockwise. The rotation of the rotating sleeve 2 causes the double-threaded screw 5 to drive the outer conveying tube 6 to retreat quickly until the fixed head 72 is exposed. Load the valve assembly 8 on the fixed head 72, and then push the toggle button 42 of the switching switch 4 toward the direction of the second end 43. The second pitch protrusion 35 of the engaging lever 3 contacts and engages with the second thread segment 53. Then, rotate the rotating sleeve 2 clockwise. The rotation of the rotating sleeve 2 causes the double-threaded screw 5 to drive the outer conveying tube 6 to move forward slowly.

[0053] During the implantation of the valve assembly 8, it is hoped that the handle can be used in combination with slow and fast control. Specifically, before the valve assembly 8 is positioned, a slow release speed is conducive to improving the accuracy of the release position. After the valve assembly 8 is positioned, a faster release speed is conducive to improving the efficiency of the release, thereby saving surgical time. First, the toggle button 42 of the switching switch 4 is toggled in the direction of the second end 43, and the rotating sleeve 2 is rotated counterclockwise. The rotation of the rotating sleeve 2 causes the double-threaded screw 5 to drive the outer conveying tube 6 to retreat slowly. After confirming the position of the valve assembly 8, the toggle button 42 of the switching switch 4 is toggled in the direction of the first end 41 of the switching switch, and the rotating sleeve 2 is rotated counterclockwise. The rotation of the rotating sleeve 2 causes the double-threaded screw 5 to drive the outer conveying tube 6 to retreat quickly.

[0054] During the recovery process of the valve assembly 8, it is hoped that the handle can advance the outer delivery tube 6 and recover the valve assembly 8 as quickly as possible. Therefore, ensure that the toggle button 42 of the switching switch 4 is turned in the direction of the first end 41 and maintained in this position, and rotate the rotating sleeve 2 clockwise. The rotation of the rotating sleeve 2 causes the double-threaded screw 5 to drive the outer delivery tube 6 to advance rapidly, thereby achieving rapid recovery of the valve assembly 8.

[0055] In summary, the handle and delivery system for delivering implants provided in this embodiment are mainly used for delivering implants, and are provided with a shift component for controlling the delivery speed of the implant to switch between a first gear and a second gear. When fast, the small pitch protrusion is separated from the small pitch thread, and when slow, the large pitch protrusion is separated from the large pitch thread. There is always only one thread engaged, which is simple to operate, can avoid mutual interference between fast and slow movements, and improve the accuracy of operation.

[0056] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A handle for delivering an implant, characterized in that: include: A hand-held sleeve and a rotating sleeve, wherein the hand-held sleeve and the rotating sleeve are coaxially arranged, and the hand-held sleeve and the rotating sleeve have a through cavity, and the distal end of the hand-held sleeve and the proximal end of the rotating sleeve are movably connected in the circumferential direction; A shift component, part of which is arranged in the through cavity of the hand-held sleeve and the rotating sleeve, the shift component is used to control the delivery speed of the implant to switch between a first gear and a second gear, the shift component includes a double-threaded screw, an engagement lever and a switch, the double-threaded screw includes a first thread segment and a second thread segment, the first thread segment and the second thread segment have different pitches, the engagement lever has a first pitch convex point and a second pitch convex point, the switch and the engagement lever are in contact, and the switch can be moved along the axial direction of the rotating sleeve, so that the first pitch convex point of the engagement lever is engaged with the first thread segment of the double-threaded screw, and the second pitch convex point is separated from the second thread segment of the double-threaded screw, or the second pitch convex point of the engagement lever is engaged with the second thread segment of the double-threaded screw, and the first pitch convex point is separated from the first thread segment of the double-threaded screw; The inner wall of the rotating sleeve is relatively provided with a first mounting hole and a second mounting hole, the axes of the first mounting hole and the second mounting hole are perpendicular to the axis of the rotating sleeve, a mounting shaft is arranged in the first mounting hole and the second mounting hole, the engaging lever is arranged on the mounting shaft, and the engaging lever can rotate around the mounting shaft; the rotating sleeve is rotated to drive the first pitch protrusion or the second pitch protrusion and the rotating sleeve to make circumferential motion together.

2. The handle for delivering an implant according to claim 1, characterized in that: The distal end of the hand-held sleeve has a first connecting end, and the proximal end of the rotating sleeve has a second connecting end. The first connecting end is a circumferential protrusion, and the second connecting end is a circumferential groove. The first connecting end is adapted to the second connecting end.

3. The handle for delivering an implant according to claim 1, characterized in that: The hand-held sleeve comprises an outer hand-held sleeve and an inner guide column located inside the outer hand-held sleeve, and the proximal end of the double-threaded screw rod is sleeved outside the inner guide column.

4. The handle for delivering an implant according to claim 3, characterized in that: The double-threaded screw has an inner guide groove, and the cross section of the inner guide groove matches the shape of the cross section of the inner guide column.

5. The handle for delivering an implant according to claim 1, characterized in that: The rotating sleeve comprises a rotating outer cylinder, and the double-threaded screw passes through the rotating outer cylinder and contacts with an inner wall of the rotating outer cylinder.

6. The handle for delivering an implant according to claim 1, characterized in that: The surface of the rotating sleeve is provided with an axial groove, the engaging lever and the switching switch are arranged between the double-threaded screw rod and the axial groove, and the axial length of the axial groove is smaller than the axial length of the switching switch.

7. The handle for delivering an implant according to claim 6, characterized in that: The switch has a first end, a second end and a toggle button. The first end and the second end of the switch are in contact with the surface of the engagement lever. The toggle button of the switch extends from the axial slot and is exposed on the rotating sleeve.

8. The handle for delivery and implantation according to claim 7, characterized in that: The engagement lever has a first side and a second side that are opposite to each other in the axial direction, and the cross-sectional shapes of the first side and the second side of the engagement lever on a plane perpendicular to the axis of the mounting shaft are arc-shaped.

9. The handle for delivery and implantation according to claim 7, characterized in that: An elastic element is arranged between the mounting shaft and the first mounting hole and / or the second mounting hole.

10. A conveying system, characterized in that: It comprises the handle, inner tube assembly and delivery outer tube as described in any one of claims 1 to 9, the inner tube assembly comprises a delivery inner tube, the proximal end of the delivery outer tube is fixed to the distal end of the shift member, the inner tube assembly passes through the delivery outer tube, the rotating sleeve and the cavity in the hand-held sleeve, the hand-held sleeve comprises an outer hand-held sleeve and an inner guide column located inside the outer hand-held sleeve, and the proximal end of the delivery inner tube is fixedly connected to the inner surface of the inner guide column on the hand-held sleeve.

Images