Medical instrument operating device and system therefor

Abstract

The present application relates to a kind of medical instrument operating device and its system, which includes: centering capture mechanism, the centering capture mechanism includes hoop rod assembly, with first working state and second working state;In the first working state, the centering capture mechanism is in open state, and the hoop rod assembly is generally in the shape of circular truncated cone or multi-ribbed truncated cone;In the second working state, the centering capture mechanism is in closed state, and the hoop rod assembly is generally in the shape of cylinder or multi-prism;Push rod assembly, the push rod assembly is slidably arranged in the centering capture mechanism in axial direction, and its distal end is detachably connected with the medical instrument.The medical instrument operating device and its system of the present application can realize the fast, accurate and stable operation of medical instrument, shorten the operation time and reduce the patient's pain.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of interventional medical devices, in particular to a medical device operating device and a system thereof. BACKGROUND

[0002] Formation of deep vein thrombosis (DVT) is a common vascular surgical disease, and its most serious complication is fatal pulmonary embolism (PE) caused by thrombus detachment. At present, medical devices such as vena cava filters are usually implanted into the inferior vena cava to prevent thrombus detachment and prevent pulmonary embolism. The retrievable filter usually needs to be retrieved by a vena cava filter retrieval device, mainly using a vena cava filter retrieval device with a circular retrieval ring to capture the retrieval hook of the vena cava filter for retrieval.

[0003] However, after the filter is implanted in the human body, it may be tilted, so that the retrieval ring of the retrieval device cannot be accurately sleeved on the retrieval hook of the filter, thereby increasing the difficulty of capturing the filter for retrieval, increasing the difficulty of removal, complicating the operation process, and prolonging the operation time. SUMMARY

[0004] Therefore, it is necessary to provide a medical device operating device which can quickly and efficiently operate the medical device in the case of tilting of the medical device to improve the retrieval efficiency of the medical device.

[0005] According to the medical device operating device of the present application, the medical device operating device is used for operating the medical device, comprising: a centering capturing mechanism, the centering capturing mechanism comprising a clamping rod assembly; the centering capturing mechanism has a first working state and a second working state; in the first working state, the centering capturing mechanism is in an open state, and the clamping rod assembly as a whole is in a circular truncated cone shape or a multi-ribbed truncated cone shape; in the second working state, the centering capturing mechanism is in a closed state, and the clamping rod assembly as a whole is in a circular cylinder shape or a multi-ribbed cylinder shape; a push rod assembly, the push rod assembly being slidably arranged in the centering capturing mechanism in the axial direction, and the distal end of the push rod assembly being detachably connected with the medical device.

[0006] In one embodiment, the centering capturing mechanism further comprises a connecting catheter, and the clamping rod assembly comprises a plurality of circumferentially distributed clamping rods, and the proximal end of each clamping rod is connected with the distal end of the connecting catheter through a rotating mechanism.

[0007] In one of the embodiments, the hoop-rod assembly further comprises a hoop guide wire connected to the at least two hoop rods, each of the hoop rods connected to the hoop guide wire is provided with at least one through hole, and the hoop guide wire can bind all the hoop rods of the hoop-rod assembly together, the length of the hoop guide wire between two circumferentially adjacent hoop rods in the first working state is greater than the length of the hoop guide wire between the corresponding two circumferentially adjacent hoop rods in the second working state.

[0008] In one of the embodiments, each of the hoop rods of the hoop-rod assembly is provided with at least one through hole, and the hoop guide wire is connected to all the hoop rods through the through holes on the hoop rods.

[0009] In one of the embodiments, each of the hoop rods is provided with a plurality of through holes spaced apart in the axial direction, and the plurality of through holes constitute a helical channel spirally ascending or a plurality of annular channels spaced apart in the axial direction.

[0010] In one of the embodiments, the hoop guide wire comprises a leading end and a trailing end, the through hole closest to the proximal end of the hoop-rod assembly among the plurality of through holes constitutes the lowest point of the helical channel or the plurality of annular channels, and the through hole closest to the distal end of the hoop-rod assembly among the plurality of through holes constitutes the highest point of the helical channel or the plurality of annular channels; the hoop guide wire passes through the helical channel or sequentially passes through the plurality of annular channels in the axial direction, and the trailing end is fixedly connected to the lowest point or passes out of the lowest point, and the leading end passes out of the highest point.

[0011] In one of the embodiments, the rotating mechanism comprises a plurality of spherical hinge joints, each of the spherical hinge joints comprises a connecting end and a rotating ball head fixedly connected to the connecting end, the connecting end of each of the spherical hinge joints is fixedly connected to the proximal end of each of the hoop rods, and the rotating ball head is movably connected to the distal end of the connecting guide tube.

[0012] In one of the embodiments, the rotating mechanism further comprises a plurality of elastic connecting members, one end of each of the elastic connecting members is fixedly connected to a position close to the proximal end side of each of the hoop rods, and the other end is fixedly connected to the distal end of the connecting guide tube.

[0013] In one of the embodiments, the rotating mechanism further comprises a plurality of first torsional springs arranged in parallel with the spherical hinge joints, one end of each of the first torsional springs is fixedly connected to the proximal end of each of the hoop rods, and the other end is fixedly connected to the distal end of the connecting guide tube.

[0014] In one of the embodiments, the rotating mechanism comprises a rotating shaft, and the connecting pipe is provided with a plurality of connecting protrusions distributed in the circumferential direction, and the rotating shaft sequentially passes through the proximal end side of the clamping rod and the connecting protrusions to realize the rotating connection of the clamping rod and the connecting pipe.

[0015] In one of the embodiments, the rotating mechanism further comprises a plurality of second torsional springs, and the rotating shaft passes through the second torsional springs, one end of each of the second torsional springs is fixedly connected with the connecting protrusion, and the other end is fixedly connected with the clamping rod adjacent to the connecting protrusion.

[0016] In one of the embodiments, the centering and capturing mechanism further comprises a clamping pipe, and the distal end of the clamping pipe is fixedly arranged at the proximal end of the connecting pipe.

[0017] In one of the embodiments, the push rod assembly comprises a hollow connecting rod assembly, a bolt head and an inner guide wire, the bolt head is fixedly arranged at the distal end of the connecting rod assembly and can be detachably connected with the end of the medical instrument, and the inner guide wire can be movably arranged in the connecting rod.

[0018] The present application also relates to a medical operation system comprising a delivery sheath and the medical instrument operation device, and the medical instrument operation device can be delivered to the position of the medical instrument through the delivery sheath to operate the medical instrument.

[0019] The present application has the following technical effects:

[0020] 1. The medical instrument operation device has good controllability and stability, can realize the quick, accurate and stable recovery of the medical instrument, and improves the recovery efficiency of the medical instrument.

[0021] 2. The present application can not only recover the medical instrument without the recovery hook, but also recover the medical instrument with the broken rod.

[0022] 3、The application can not only realize the recovery of medical devices, but also realize the correction or multiple release of medical devices.

[0023] 4、The application can realize the recovery from both ends of the medical device at the same time by combining two medical device operating devices, thereby ensuring the success rate of the recovery of the broken rod medical device.

[0024] 5、The medical device operating device of the application can not only be used for the operation of medical devices such as filters, but also can be used for the operation (recovery, correction or release) of occluders or other medical devices, and has a wide application scenario. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic view of the overall structure of the medical device operating device and system in an embodiment.

[0026] Figure 2 It is an exploded structural schematic view of the medical device operating device in an embodiment.

[0027] Figure 3 It is a top view of the expanded state of the clamping assembly in an embodiment.

[0028] Figure 4 It is a schematic view of the connection structure of the clamping rod and the connecting guide pipe in an embodiment.

[0029] Figure 5 It is a sectional view of the push rod assembly in an embodiment.

[0030] Figure 6 It is a structural schematic view of the medical device (filter) in an embodiment.

[0031] Figure 7 It is a schematic view of the centering catching mechanism in an open state when recovering the medical device in at least one embodiment.

[0032] Figure 8 It is a schematic view of the centering catching mechanism in a closed state when recovering the medical device in at least one embodiment.

[0033] Figure 9 It is a structural schematic view of the inner guide wire passing through the medical device connecting nut in at least one embodiment.

[0034] Figure 10 It is a structural schematic view of the threaded connection between the push rod assembly and the medical device connecting nut in at least one embodiment.

[0035] Figure 11 It is a recovery schematic view of the broken rod position occurring at the distal end (proximal end) position in at least one embodiment.

[0036] Figure 12FIG. 6 is a schematic view of the retrieval of the medical device in the proximal (distal end) position for at least one embodiment.

[0037] Figure 13 FIG. 7 is a schematic view of the opening of the clamping assembly when the medical device is retrieved using two medical device handling devices for at least one embodiment.

[0038] Figure 14 FIG. 8 is a schematic view of the closing of the clamping assembly when the medical device is retrieved using two medical device handling devices for at least one embodiment.

[0039] Figure 15 FIG. 9 is a schematic view of the medical device entering the clamping assembly when the medical device is retrieved using two medical device handling devices for at least one embodiment.

[0040] Figure 16 FIG. 10 is a schematic view of the connection of the clamping rod to the connecting catheter for another embodiment.

[0041] Figure 17 FIG. 11 is a schematic view of the connection of the clamping rod to the connecting catheter for yet another embodiment. DETAILED DESCRIPTION

[0042] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described below in detail with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail in order to avoid unnecessarily obscuring the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0043] It should be noted that when an element is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can also be present. In addition, the term "connected" as used herein means the element is either directly connected to the other element or an intervening element can also be present. As used herein, the term "vertical", "horizontal", "left", "right", and the like, are merely used for the purpose of illustration and are not intended to be limiting.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this description, the singular forms "a", "an" and "the" include plural references unless the context clearly dictates otherwise. The term "and / or" includes any and all combinations of one or more of the associated listed items.

[0045] In order to more clearly describe the structure of the present application, "distal end" and "proximal end" are used as orientation words, which are common terms in the field of interventional medical devices, wherein "distal end" means the end far from the operator during the operation, and "proximal end" means the end close to the operator during the operation.

[0046] The axial direction refers to the direction parallel to the line connecting the center of the distal end and the center of the proximal end of the medical device; and the radial direction refers to the direction perpendicular to the axial direction.

[0047] First embodiment

[0048] Referring to Figure 1 As shown in the drawings, the present embodiment provides a medical device operating system 100, which comprises a delivery sheath 40 and a medical device operating device 10. The medical device operating device 10 can be delivered to a target position through the delivery sheath 40 and the medical device 50 can be withdrawn from the body through the delivery sheath 40.

[0049] Continuing to refer to Figure 1 The medical device operating device 10 in the present embodiment comprises a centering capturing mechanism 20 and a push rod assembly 30. The centering capturing mechanism 20 has a first working state and a second working state. In the first working state, the centering capturing mechanism 20 is in an open state, at which time the whole of the clamping rod assembly 23 of the centering capturing mechanism 20 is in the shape of a circular truncated cone or a multi-ribbed truncated cone; in the second working state, the centering capturing mechanism 20 is in a closed state, at which time the whole of the clamping rod assembly 23 of the centering capturing mechanism 20 is in the shape of a circular cylinder or a multi-ribbed cylinder. The push rod assembly 30 is slidably arranged in the centering capturing mechanism 20 in the axial direction, and the distal end thereof is detachably connected with the medical device 50, so as to realize the withdrawal or release of the medical device 50.

[0050] Referring to Figure 2 As shown in the drawings, the centering capturing mechanism 20 comprises, in sequence from the distal end to the proximal end, a clamping rod assembly 23, a connecting catheter 22 and a clamping catheter 21. The distal end of the connecting catheter 22 is movably connected with the proximal end of the clamping rod assembly 23, and the proximal end is fixedly connected with the clamping catheter 21. The clamping rod assembly 23, the connecting catheter 22 and the clamping catheter 21 all have internal cavities, and the internal cavities are connected to form an internal passage, in which the push rod assembly 24 is axially slidably arranged. The connecting catheter 22 can be made of metal or a relatively hard high polymer material, and the clamping catheter 21 can be a spring tube or a high polymer material tube, so as to facilitate the better pushability and flexibility when the medical device 50 is pre-withdrawn into the internal passage.

[0051] The clamping rod assembly 23 comprises a plurality of clamping rods 231 distributed in a circle relative to the central axis of the connecting conduit 22 and a clamping guide wire 232 connected with the clamping rods 231. The proximal end of each clamping rod 231 is rotationally connected with the connecting conduit 22 so as to be rotatable relative to the connecting conduit 22 to enable the distal end of the clamping rod 231 to be away from the central axis or close to the central axis. When each clamping rod 231 is rotated relative to the connecting conduit 22 in a direction away from the central axis, the clamping rod assembly 23 is slowly opened to be in a circular truncated cone shape or a multi-ribbed truncated cone shape. When each clamping rod 231 is rotated relative to the connecting conduit 22 in a direction close to the central axis, the clamping rod assembly 23 is slowly closed to be in a circular cylinder shape or a multi-ribbed cylinder shape.

[0052] Referring to Figures 2-3 Each clamping rod 231 is provided with a plurality of communication holes 2311 in the axial direction, and the communication holes 2311 of each clamping rod 231 are arranged at different positions in the axial direction. The communication holes 2311 of all the clamping rods 231 form a spiral ascending annular channel 233. Specifically, the communication holes 2311 of the adjacent clamping rods 231 are smoothly connected in sequence along the proximal end to the distal end of the clamping rod assembly 23, and the trajectory line is a spiral ascending trajectory line, which also forms the spiral ascending spiral channel 233. The cross-sectional diameter of the spiral channel 233 on each clamping rod 231 is the same as the diameter of the corresponding communication hole 2311, and the connecting line of the centers of the cross sections is the above-mentioned trajectory line. Each clamping rod 231 can be a flat sheet structure, and the clamping rod assembly 23 is approximately a multi-ribbed cylinder structure when closed. In other embodiments, each clamping rod 231 can also be an arc-shaped sheet structure, and the clamping rod assembly 23 is approximately a circular cylinder structure when closed. The number of clamping rods 231 is at least three, and the number is not limited as long as it can be closed to clamp the end of the medical device. In order to facilitate operation, the clamping rod 231 can have a certain radiopacity. In addition, the clamping rod 231 is usually made of metal or other materials with high hardness. The use of materials with high hardness can avoid deformation of the clamping rod 231 due to the difference in hardness when the medical device is recovered into the clamping rod assembly 23, thereby increasing the recovery resistance.

[0053] In other embodiments, each clamping rod can be provided with at least one communication hole in the axial direction, and the communication holes of each clamping rod are arranged at the same or approximately the same position in the axial direction. The communication holes of all the clamping rods form at least one annular channel. When there are multiple annular channels, the multiple annular channels are sequentially distributed along the axial direction of the clamping rod. At this time, the communication hole or communication holes closest to the proximal end of the clamping rod are the lowest point of the multiple annular channels, and the communication hole or communication holes closest to the distal end of the clamping rod are the highest point of the multiple annular channels.

[0054] The hoop guide wire 232 is a wire made of elastic metal or other material, has a certain developing property, and includes opposite end 2321 and head 2322. The end 2321 of the hoop guide wire 232 is fixed to the hoop rod 231 and arranged at the lowest point of the spiral channel 233 (the closest connecting hole 2311 to the proximal end of the hoop rod assembly 23 constitutes the lowest point of the spiral channel 233), and the head 2322 is arranged outside the spiral channel 233 after passing through the highest point of the spiral channel 233 (the closest connecting hole 2311 to the distal end of the hoop rod assembly 23 constitutes the highest point of the spiral channel 233) through the connecting hole 2311. Specifically, on the one hand, the hoop guide wire 232 is arranged in the spiral channel 233 by sequentially passing through all the connecting holes 2311 of the hoop rod 231; on the other hand, the end 2321 of the hoop guide wire 232 is fixed to the hoop rod 231 and arranged at the lowest point of the spiral channel 233, and the head 2322 is arranged outside the spiral channel 233 after reaching and passing through the highest point of the spiral channel 233. After the head 2322 extends out of the spiral channel 233, it can reach the proximal end of the hoop guide tube 21 along the hoop guide channel (not shown in the figure) arranged on the wall of the connecting guide tube 22 and the hoop guide tube 21, or extend along the inner wall or outer wall of the connecting guide tube 22 and the hoop guide tube 21 to reach the proximal end of the hoop guide tube 21.

[0055] In other embodiments, when each hoop rod is provided with one connecting hole in the axial direction, the connecting holes of all the hoop rods constitute a ring-shaped channel, and the hoop guide wire 232 passes through the ring-shaped channel, and its end 2321 is fixedly connected to one of the connecting holes 2311, and the head 2322 can be arranged outside the ring-shaped channel. When each hoop rod is provided with multiple connecting holes in the axial direction, the hoop guide wire sequentially passes through multiple ring-shaped channels in the axial direction, and its end is fixedly connected to the lowest point, and the head is arranged outside the highest point.

[0056] In other embodiments, at least two of the hoop rods can be provided with at least one connecting hole, and the hoop guide wire passes through all the connecting holes to bind all the hoop rods together. When a hoop rod is not provided with a connecting hole, the hoop guide wire can be bypassed from the side (i.e., the outer side) of the hoop rod away from the central axis of the hoop rod assembly and then passed through the connecting hole of the other hoop rod with a connecting hole. That is, when the hoop guide wire is in the form of a ring or a spiral around the hoop rod assembly, if a hoop rod is provided with a connecting hole, the hoop guide wire passes through the connecting hole; if a hoop rod is not provided with a connecting hole, the hoop guide wire is bypassed from the outer side of the hoop rod. In this way, even if the hoop guide wire does not pass through some hoop rods, all the hoop rods can be bound together.

[0057] In other embodiments, the tightening guide wire 232 can also be arranged outside the spiral channel 233 or the annular channel at both ends. Specifically, the first tightening channel (not shown in the figure) is arranged on the wall of the connecting guide tube 22 and the tightening guide tube 21, and after the tightening guide wire 232 passes through the spiral channel 233 or the annular channel, both ends of the tightening guide wire 232 are arranged outside the spiral channel 233 or the annular channel (not shown in the figure). Specifically, the tail end 2321 is arranged to extend out of the proximal end of the tightening guide tube 21 through the first tightening channel after extending out of the connecting hole 2311 at the lowest position of the spiral channel 233 or the annular channel, and the head end 2322 is arranged to extend out of the proximal end of the tightening guide tube 21 along the inner wall or the outer wall of the connecting guide tube 22 and the tightening guide tube 21 after extending out of the connecting hole 2311 at the highest position of the spiral channel 233 or the annular channel, and the head end 2322 can extend to the proximal end of the tightening guide tube 21 after extending out of the connecting hole 2311 at the highest position of the spiral channel 233 or the annular channel. In addition, the head end 2322 can also extend to the proximal end of the tightening guide tube 21 along the second tightening channel (not shown in the figure) arranged on the wall of the connecting guide tube 22 and the tightening guide tube 21.

[0058] Referring to Figure 4 The distal end of the connecting guide tube 22 and the proximal end of the tightening rod 231 of the tightening rod assembly 23 are movably connected through the rotating mechanism 24, and the rotating mechanism 24 comprises a plurality of spherical hinge joints 241, each of which comprises a connecting end 2411 and a rotating ball head 2412 fixedly connected to the connecting end 2411. The connecting end 2411 of each of the spherical hinge joints 241 is fixedly connected to the proximal end of each of the tightening rods 231, and the rotating ball head 2412 is movably connected to the distal end of the connecting guide tube 22.

[0059] In addition, the rotating mechanism 24 further comprises a plurality of elastic connecting members 242, each of which is fixedly connected to the proximal end side of the tightening rod 231 and the distal end of the connecting guide tube 22. The elastic connecting member 242 is an elastic rod, an elastic sheet or other common elastic member, and its function is to provide elastic restoring force acting on the tightening rod 231 so that the tightening rod 231 can rotate away from the central axis and expand when no external force is applied. That is, in the absence of other external force applied to the tightening rod 231, the presence of the elastic connecting member 242 causes the tightening rod assembly 23 to expand outwardly and form a circular or multi-ribbed table shape.

[0060] By default, the clamping rod assembly 23 is in an open frustum shape due to the elastic restoring force of the elastic element 242. At this time, the clamping guide wire 232, located within the spiral channel 231, has a spiral shape with a gradually increasing diameter from the distal end to the proximal end. When the head end 2322 of the clamping guide wire 232 is pulled, the length of the clamping guide wire 232 within the spiral channel 233 decreases, causing the clamping rod 231 to overcome the elastic restoring force of the elastic connector 242 and tighten relative to the connecting conduit 22. This causes the clamping rod assembly 23 to slowly close into a cylindrical or polygonal structure. When the head end of the clamping guide wire 232 is slowly released, the clamping rod assembly 23 slowly opens again, returning to its frustum or polygonal shape under the action of the elastic restoring force of the elastic element 242.

[0061] Please see Figure 2 , 5 The push rod assembly 30 includes a bolt head 301, a connecting rod assembly 302, and an inner guide wire 303. The bolt head 301 includes a threaded connecting section 3012 and a bolt head body 3011 disposed at one end of the threaded connecting section 3012. The outer diameter of the threaded connecting section 3012 is smaller than the outer diameter of the bolt head body 3011, thus forming a stepped surface at the connection point.

[0062] The connecting rod assembly 302 is hollow, comprising a hollow first connecting rod 3021 and a hollow second connecting rod 3022 passing through the first connecting rod 3021. The distal end of the first connecting rod 3021 is fixedly connected to the proximal end of the plug head 301. The outer wall of the second connecting rod 3022 contacts and is fixedly connected to the inner wall of the first connecting rod 3021 as a single unit before being fixedly connected to the inner wall of the plug head 301 to increase the overall structural strength of the push rod assembly 30. An inner guide wire 303 passes through the interior of the second connecting rod 3022 and the plug head 301 and can slide relative to the plug head 301, extending beyond the distal end of the plug head 301. The fixing methods include, but are not limited to, welding, bonding, or other common fixing methods.

[0063] The first connecting rod 3021 can be a hollow rod with a certain structural rigidity and flexibility, such as a steel cable, spring rod, or polymer tube. The second connecting rod 3022 can be a multi-strand wire tube or other hollow rod with a certain strength and flexibility. There are no special requirements for the material and structure of the first connecting rod 3021 and the second connecting rod 3022, as long as they are hollow rods with a certain structural rigidity and flexibility to ensure good pushing performance. A certain rigidity ensures that the connecting rod can transmit force to the embolus head, allowing the embolus head to be pushed forward. A certain flexibility ensures that during the pushing process, the connecting rod can adapt to the deformation of the curved blood vessel, thus advancing smoothly in the blood vessel.

[0064] In other embodiments, the connecting rod 302 can include only one connecting rod. The distal end of the connecting rod can be fixedly connected with the proximal end portion or the inner wall of the knob 301.

[0065] Referring to Figure 6 In the embodiment, the medical instrument 50 is a filter, which is schematically illustrated with reference to a conventional lantern-shaped model. Of course, the filter of the present application is not limited to the lantern shape, but also can be used in umbrella-shaped filters. Specifically, the medical instrument 50 includes a plurality of proximal end support rods 51, a plurality of side wall support rods 52, a plurality of distal end support rods 53, a proximal end head 54, a distal end head 56, and connecting nuts (including a proximal end head connecting nut 55 and a distal end head connecting nut 57). The proximal end head connecting nut 55 is fixedly arranged at the inner wall of the proximal end head 54, and the distal end head connecting nut 57 is fixedly arranged at the inner wall of the distal end head 56. The medical instrument 50 is made of nickel-titanium alloy, and the proximal end head connecting nut 55 and the distal end head connecting nut 57 can be made of metal material, of course, can also be made of other materials, such as ceramic material or biological composite or biocompatible material, which is not limited herein. The threaded connection section 3012 of the knob 301 of the push rod assembly 30 can be threadedly connected with the proximal end head connecting nut 55 and the distal end head connecting nut 57. In other embodiments, the distal end or the proximal end of the knob and the medical instrument can also adopt other detachable connection modes, such as protrusion and groove cooperation or other detachable connection modes.

[0066] Referring to Figures 7-10 When the medical instrument 50 is tilted, the working process of the medical instrument operating device of the present application is described.

[0067] Referring to Figure 7 When the medical instrument 50 is tilted and needs to be recovered, after the femoral vein is punctured, the medical instrument operating device 10 is delivered to the predetermined position by using the delivery sheath 40, so that the head end of the centering and capturing device 20 of the medical instrument operating device 10 is arranged at the position of the distal end head 56 of the medical instrument 50, and the hoop rod assembly 23 is in an open state, so that the hoop rod assembly 23 can wrap the distal end head 56 of the medical instrument 50 in a suitable position. At this time, the centering and capturing mechanism 20 is in the first working state.

[0068] Referring to Figure 8 When the hoop guide wire 232 is pulled proximally, so that the hoop rod assembly 23 is slowly closed, at this time, the opening size of the distal end of the hoop rod assembly 23 will gradually decrease until the inner wall surface tightly abuts the outer wall of the distal end head 56 of the medical instrument 50, so that the centering and capturing device 20 captures the distal end head 56 of the medical instrument 50. At this time, the centering and capturing mechanism 20 is in the second working state.

[0069] Alternatively, when both ends of the hoop guide wire 232 are arranged outside the spiral channel 233 or the annular channel, the closing of the hoop rod assembly 23 can be achieved by fixing one end and pulling the other end, or by pulling both ends of the hoop guide wire 232 simultaneously.

[0070] Referring to Figure 9 As shown, the centering and capturing mechanism 20 is kept stationary relative to the medical instrument 50, i.e., the centering and capturing mechanism 20 is in a state of stationary capturing of the medical instrument 50, and then the inner guide wire 303 is pushed distally to a certain suitable distance through the distal end head end connecting nut 57 inside the distal end head end 56 of the medical instrument 50.

[0071] Referring to Figure 10 As shown, when the inner guide wire 303 passes out of the distal end head end connecting nut 57, the inner guide wire 303 is ensured to be stationary relative to the medical instrument 50, and the push rod assembly 30 is pushed in the distal direction, so that the stud 303 of the push rod assembly 30 is at the position of the distal end head end connecting nut 57 of the medical instrument 50, and the push rod assembly 30 is screwed to achieve threaded connection with the medical instrument.

[0072] After the push rod assembly 30 is connected to the connecting nut of the medical instrument 50, the inner guide wire 303 is withdrawn to the outside of the body, and the push rod assembly 30 is pulled in the proximal direction, so that the medical instrument 50 enters the closed hoop rod assembly 23, the connecting catheter 23, and the hoop catheter 21 in sequence, and the pre-recovery of the medical instrument 50 is completed.

[0073] After the medical instrument 50 is pre-recovered, the entire medical instrument operating device 20 is pulled in the proximal direction so that the device enters the recovery sheath 40, and then the recovery sheath 30 is withdrawn to the outside of the body, thereby completing the recovery of the medical instrument 50.

[0074] As described above, when the centering and capturing mechanism is in an open state, the hoop rod assembly is in a circular or multi-ribbed table shape with a large distal opening size and a small proximal opening size, and in this state, the end of the medical instrument can easily enter the hoop rod assembly. Then the hoop guide wire is pulled back to gradually reduce the distal opening size of the hoop rod assembly and gradually approach the distal end head end of the medical instrument, so as to capture the end of the medical instrument. When the centering and capturing mechanism is in the first working state, the distal opening size of the hoop rod assembly is large, so as to increase the working range of capturing the end of the medical instrument, so that even if the medical instrument is in an inclined state, the centering and capturing mechanism can smoothly capture the end of the medical instrument. After the medical instrument is captured, the subsequent threaded connection between the stud of the push rod assembly and the nut of the end of the medical instrument is easily achieved through the guiding action of the inner guide wire, thereby completing the connection between the implantation instrument operating device and the medical instrument.

[0075] Referring toFigures 11-15 When the medical instrument 50 has a broken rod, the working process of the medical instrument operating device of the present application is described, wherein Figures 11-12 In order to recover the broken rod medical instrument by using a single medical instrument operating device, Figures 13-15 In order to use two medical instrument operating devices to operate from both ends of the medical instrument at the same time to achieve recovery.

[0076] Referring to Figure 11 When the broken rod position A is near the distal end (proximal end) position of the medical instrument, the medical instrument operating device 10 can be introduced into the blood vessel by using the distal end femoral vein approach, the centering catching mechanism 20 is pushed, the clamping rod assembly 23 wraps the distal end support rod 53 and the side wall support rod 52 in turn, and the medical instrument 50 is pre-recovered to the position near the broken rod. After the clamping guide wire is loosened, the clamping rod assembly 23 is re-expanded to enlarge the opening size at the distal end. Continue to push the centering catching mechanism 20 until the medical instrument broken rod enters the clamping rod assembly 23, then tighten the clamping guide wire to close it, and then continue to push the centering catching mechanism 20 to make the medical instrument enter the clamping catheter, so as to realize the pre-recovery of the medical instrument with broken rod.

[0077] Referring to Figure 12 When the broken rod position B occurs near the proximal end (distal end) position of the medical instrument, the medical instrument operating device 10 can be introduced into the blood vessel by using the proximal end femoral vein approach, and the medical instrument is caught from the proximal end of the medical instrument 50. The specific operation method is basically the same as that in Figure 11 , which will not be described in detail here.

[0078] Referring to Figures 13-14 If it is difficult to recover the medical instrument 50 with a broken rod by using a single medical instrument operating device 10, two medical instrument operating devices 10 can be used at the same time to shrink the broken rod part into the clamping catheter from the proximal end (distal end) of the medical instrument 50 and the distal end (proximal end) of the medical instrument, respectively. Bidirectional control makes the broken rod of the medical instrument 50 enter the clamping catheter, and the clamping rod assemblies 23 of the two medical instrument operating devices 10 converge, and then the clamping catheter enters the recovery sheath 30 from the distal end or the proximal end at the same time, so as to realize the recovery of the medical instrument with a broken rod.

[0079] It should be noted that the medical instrument operating device of the present application is not limited to the recovery of medical instruments, but can also be used to release or correct the tilt of medical instruments. After the medical instrument 50 is delivered to the predetermined position by the delivery sheath 30 and released, the inner guide wire is pushed to the distal end of the medical instrument 50 or the connecting nut at the proximal end. If the push rod assembly is found to be in a tilted state after the threaded connection with the medical instrument is released, the pin head of the push rod assembly can be reconnected to the connecting nut of the medical instrument through the inner guide wire and the centering capture mechanism, and the medical instrument can be recovered into the clamping catheter or sheath for secondary or even multiple releases until the position of the medical instrument meets the implantation requirements.

[0080] In addition, the medical instrument of the present application is not limited to filters and other medical instruments, but can also be used to capture occluders with connecting nuts or other medical instruments that can be recovered, released or corrected through threaded connection.

[0081] Second embodiment

[0082] Referring to Figure 16 The structure of the present embodiment is basically the same as that of the first embodiment, except that the elastic connecting member 243 used here is a first torsional spring. Specifically, one end of the elastic connecting member 243 is fixedly connected to the clamping rod 231a, and the other end is connected to the distal end of the connecting catheter 22a. By default, the elastic restoring force of the elastic connecting member 243 will exert a rotational moment on the clamping rod 231a, so that the clamping rod 231a rotates away from the central axis of the connecting catheter 22a to open the clamping rod assembly (not marked in the figure). When the clamping rod 231a rotates relative to the connecting catheter 22a under the action of an external force through the spherical hinge joint, the elastic connecting member 243 will rotate, and its elastic restoring force will increase. When the clamping rod assembly 23 is in a closed state, the elastic restoring force of the elastic connecting member 243 reaches a maximum value. When the external force disappears, the elastic restoring force of the elastic connecting member 243 will make the clamping rod assembly 23 return to an outwardly open state.

[0083] Third embodiment

[0084] Referring to Figure 17The embodiment is basically the same as the first embodiment, except that the rotating mechanism 25 for movably connecting the hoop rod and the connecting catheter in the embodiment is different from that in the first embodiment. Specifically, the proximal end side of the hoop rod 231b is provided with a first connecting hole 2312. The distal end side of the connecting catheter 22b is provided with a plurality of connecting protrusions 221 around the central axis of the connecting catheter 22b, and adjacent connecting protrusions 221 form a connecting groove 223. Each connecting protrusion 221 is provided with a second connecting hole 224. The rotating shaft 251 passes through the first connecting hole 2312 and the second connecting hole 224 in sequence, thereby achieving the articulation of the hoop rod 231b and the connecting catheter 22b, and at this time the hoop rod 231b is arranged in the connecting groove 223. Wherein, the rotating shaft 251 is connected at the head and tail end after passing through all the first connecting holes 2312 and the second connecting holes 224, so that the rotating shaft 255 is in the form of a closed ring as a whole, preventing it from being loosened relative to the connecting catheter 22b. In addition, the first connecting hole 2312 and the rotating shaft 251 are in clearance fit, so that they can be relatively rotated.

[0085] Each hoop rod 231b is also provided with a second torsional spring 253 used in cooperation therewith. Wherein, the rotating shaft 251 passes through the center hole of the second torsional spring 253, one end of the second torsional spring 253 is fixedly arranged on the connecting protrusion 221, and the other end is fixedly arranged on the hoop rod 231b adjacent to the connecting protrusion 221, so as to realize the connection of the hoop rod 231b and the connecting protrusion 221 through the second torsional spring 253. When the hoop rod 231b is not subjected to other external force, the elastic restoring force of the second torsional spring 253 will exert a torque on the hoop rod 231b, so as to make the hoop rod 231b rotate in the direction away from the central axis of the connecting catheter 22b to open the hoop rod assembly 23.

[0086] It should be noted that the embodiments 1-3 of the present application all rely on the elastic restoring force of the elastic connecting member or the torsional spring to realize the opening of the hoop rod assembly. Other alternative modes can also be adopted, such as the hoop guide wire is made of shape memory alloy, and is in the original open mode of spiral rising in the heat setting mode. In the relaxed state of the hoop guide wire, the opening of the hoop rod assembly can be realized.

[0087] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present disclosure.

[0088] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A filter operating device for operating a filter, characterized in that, include: A centering and capturing mechanism includes a clamping rod assembly and a connecting conduit. The clamping rod assembly includes multiple circumferentially distributed clamping rods and clamping guide wires connected to at least two of the clamping rods. The proximal end of each clamping rod is connected to the distal end of the connecting conduit via a rotating mechanism. Each clamping rod connected to the clamping guide wire has at least one communicating hole. The clamping guide wires can bind all the clamping rods of the clamping rod assembly together. The centering and capturing mechanism has a first working state and a second working state. In the first working state, the centering and capturing mechanism is in an open state, and the clamping rod assembly is generally frustum-shaped or pyramidal. In the second working state, the centering and capturing mechanism is in a closed state, and the clamping rod assembly is generally cylindrical or pyramidal. In the first working state, the length of the clamping guide wire between two adjacent clamping rods in both directions is greater than the length of the corresponding clamping guide wire between two adjacent clamping rods in both directions in the second working state. A push rod assembly is slidably disposed within the centering and capturing mechanism relative to the centering and capturing mechanism in the axial direction. The push rod assembly includes a hollow connecting rod assembly, a plug head, and an inner guide wire. Both the proximal and distal ends of the filter have connecting nuts. The plug head is fixedly disposed at the distal end of the connecting rod assembly and can be threadedly connected to the connecting nut of the filter. The inner guide wire is movably inserted through the connecting rod assembly.

2. The filter operating device according to claim 1, characterized in that, Each of the clamping rods in the clamping rod assembly is provided with at least one connecting hole, and the clamping guide wire connects all the clamping rods together through the connecting holes on the clamping rods.

3. The filter operating device according to claim 2, characterized in that, Each of the clamping rods is provided with multiple connecting holes at intervals along the axial direction, and the multiple connecting holes form a spiral channel that rises in a spiral direction or multiple annular channels that are distributed at intervals along the axial direction.

4. The filter operating device according to claim 3, characterized in that, The clamping guide wire includes a head end and an end end. Among the plurality of connecting holes, the connecting hole closest to the proximal end of the clamping rod assembly constitutes the lowest point of the spiral channel or the plurality of annular channels. Among the plurality of connecting holes, the connecting hole closest to the distal end of the clamping rod assembly constitutes the highest point of the spiral channel or the plurality of annular channels. The clamping guide wire passes through the spiral channel or sequentially passes through the plurality of annular channels along the axial direction, and its end end is fixedly connected to or exits from the lowest point. The head end exits from the highest point.

5. The filter operating device according to claim 1, characterized in that, The rotating mechanism includes multiple spherical joints, each spherical joint including a connecting end and a rotating ball head fixedly connected to the connecting end; the connecting end of each spherical joint is fixedly connected to the proximal end of each clamping rod, and the rotating ball head is movably connected to the distal end of the connecting conduit.

6. The filter operating device according to claim 5, characterized in that, The rotating mechanism also includes multiple elastic connectors, one end of each elastic connector being fixedly connected to the proximal side of each clamping rod, and the other end being fixedly connected to the distal end of the connecting conduit.

7. The filter operating device according to claim 5, characterized in that, The rotating mechanism also includes a plurality of first torsion springs arranged in parallel with the spherical joint. One end of each first torsion spring is fixedly connected to the proximal end of each clamping rod, and the other end is fixedly connected to the distal end of the connecting conduit.

8. The filter operating device according to claim 1, characterized in that, The rotating mechanism includes a rotating shaft, and the connecting conduit is provided with a plurality of connecting protrusions evenly distributed along the circumference. The rotating shaft passes through the proximal side of the clamping rod and the connecting protrusions in sequence to realize the rotating connection between the clamping rod and the connecting conduit.

9. The filter operating device according to claim 8, characterized in that, The rotating mechanism also includes a plurality of second torsion springs, the rotating shaft passes through the second torsion springs, one end of each second torsion spring is fixedly connected to the connecting protrusion, and the other end is fixedly connected to the clamping rod adjacent to the connecting protrusion.

10. The filter operating device according to any one of claims 1-9, characterized in that, The centering and capturing mechanism also includes a clamping conduit, the distal end of which is fixedly disposed at the proximal end of the connecting conduit.

11. A filter operating system, comprising a delivery sheath and a filter operating device as described in any one of claims 1-10, the filter operating device being delivered to the filter location via the delivery sheath to operate the filter.

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