Compression device for interventional instruments and method of operation

Abstract

The application discloses a compression device of an interventional instrument and an operation method thereof, wherein the compression device of the interventional instrument comprises at least two clamp units, a plurality of guide components and a clamping structure, each clamp unit is sequentially inserted into a working channel through a comb-shaped structure, and each adjacent clamp unit is provided with a corresponding sliding groove; each guide component is arranged in the corresponding sliding groove of each adjacent clamp unit, and is used for guiding relative movement of each clamp unit to scale the working channel; and the clamping structure comprises first clamping teeth acting on the guide components, and the first clamping teeth are arranged on the inner wall of the sliding groove along the extension direction of the sliding groove. According to the scheme, when external force is stopped from being applied to the compression device, each clamp unit can be maintained in the current state through the clamping structure, so that the interventional instrument can be pressed and held.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a compression device for interventional instruments and an operation method thereof. BACKGROUND

[0002] During the implementation of an interventional operation, in order to facilitate the in-vivo delivery of an interventional instrument, the interventional instrument needs to be radially compressed by a compression device before the operation, so as to obtain a smaller radial size, and then be loaded into a delivery system in a compressed state and delivered to a treatment site in the body in the compressed state, and finally be expanded to a functional size at a desired position.

[0003] During the compression process, once the external driving force is released, the interventional instrument and the compression device remain in the current state due to the resilience of the interventional instrument, and it is difficult to operate intermittently, and generally needs additional tooling cooperation. SUMMARY

[0004] The present application provides a compression device for interventional instruments, which facilitates compression operation.

[0005] The present application discloses a compression device for interventional instruments, comprising:

[0006] At least two clamping units, each clamping unit is sequentially inserted around a working channel through a comb-shaped structure, and each adjacent clamping unit is provided with a corresponding sliding groove;

[0007] A plurality of guide components, each guide component is arranged in the corresponding sliding groove of the adjacent clamping unit, and is used to guide the relative movement of each clamping unit to scale the working channel;

[0008] A clamping structure, comprising a first clamping tooth acting on the guide component, the first clamping tooth is arranged on the inner wall of the sliding groove along the extension direction of the sliding groove.

[0009] The following also provides several optional modes, but not as an additional limitation to the above overall scheme, but only as a further supplement or preference, without technical or logical contradiction, each optional mode can be combined with the above overall scheme, and can also be combined between multiple optional modes.

[0010] Optionally, along the width direction of the sliding groove, the sliding groove has two opposite side walls, and the first clamping tooth is distributed on one side wall or on both side walls.

[0011] Optionally, the sliding grooves of the two adjacent clamping units are independently configured, and the sliding groove is a strip-shaped and the extension path is a straight line or an arc.

[0012] Optionally, the sliding grooves of the two adjacent clamping units partially overlap and form an intersection area accommodating the guide component, and the intersection area has a variable width.

[0013] Optionally, the width of the chute gradually decreases from the middle of the chute to the two ends of the chute.

[0014] Optionally, each clamp unit has a movement direction pointing to the center of the working channel, and the clearance between the two adjacent clamp units deviates from the movement direction, and the intersection area has a width change through the clearance.

[0015] Optionally, each clamp unit has a movement direction pointing to the center of the working channel, and the clearance between the two adjacent clamp units deviates from the movement direction, and the intersection area has a width change through the clearance.

[0016] Optionally, the clamp unit includes a plurality of unit pieces arranged along the thickness direction of the compression device, and the plurality of unit pieces are divided into two groups, and each group constitutes a connecting arm.

[0017] Each unit piece is integrally formed or each unit piece is separately fixed by being stacked.

[0018] Optionally, each unit piece has opposite tooth roots and tooth parts, and the tooth parts are provided with the chute.

[0019] Optionally, in the same connecting arm, the two adjacent unit pieces are independently configured, the tooth roots of each group of unit pieces are alternately stacked along the thickness direction of the compression device, and are fixed at the stacking positions by connecting pieces, the tooth parts of the unit pieces in the same group are uniformly oriented and are arranged at intervals to form the comb-shaped structure.

[0020] Optionally, the clamp unit includes a plurality of unit pieces fixed by being stacked, and the plurality of unit pieces are divided into two groups, and each group constitutes a connecting arm.

[0021] Each unit piece is integrally formed or each unit piece is separately fixed by being stacked.

[0022] Optionally, each unit piece has opposite tooth roots and tooth parts, and the tooth parts are provided with the chute.

[0023] The tooth roots of each group of unit pieces are alternately stacked along the thickness direction of the compression device, and are fixed at the stacking positions by connecting pieces, the tooth parts of the unit pieces in the same group are uniformly oriented and are arranged at intervals to form the comb-shaped structure.

[0024] Optionally, the clamp unit includes:

[0025] A plurality of unit pieces, and the plurality of unit pieces are stacked along the thickness direction of the compression device.

[0026] A spacer, the spacer is arranged between the adjacent unit pieces along the thickness direction of the compression device, and the unit pieces are arranged at intervals to form the comb-shaped structure.

[0027] Optionally, the grooves on each unit piece in the same connecting arm are consistent in shape and aligned in position.

[0028] The extension paths of the grooves in different connecting arms are independently set.

[0029] Optionally, the connecting piece is columnar, and the axis of the connecting piece extends along the thickness direction of the compression device.

[0030] For the same jaw unit, the number of connecting pieces is at least two, and each connecting piece is arranged along the radial direction of the working channel.

[0031] Optionally, the outer side of at least one of the jaw units is provided with a friction-increasing area.

[0032] Optionally, the friction coefficient of the friction-increasing area is greater than the friction coefficient of the inner wall of the groove.

[0033] Optionally, the friction coefficient of the friction-increasing area is greater than the friction coefficient of at least the part of the guiding component in contact with the inner wall of the groove.

[0034] Optionally, the guiding component has an axis in space, and the axis of the guiding component extends along the thickness direction of the compression device.

[0035] Optionally, the extension path of the groove is arc-shaped, and the arc top of the arc-shaped path faces or faces away from the geometric center of the compression device.

[0036] Optionally, along the thickness direction of the compression device, the guiding component comprises:

[0037] a main body part, which is located in the groove and has two ends penetrating out of the groove;

[0038] a limiting head, which is fixed to the two ends of the main body part and is limited by the groove.

[0039] Optionally, the main body part of the guiding component comprises two parts distributed in the axial direction, and each part is fixed to each other by at least one of bonding, sleeving, inserting, and threading.

[0040] Optionally, the main body part and one of the limiting heads are an integral structure.

[0041] Optionally, the guiding component is a split structure, and each part is fixed by a mutually cooperating mechanical structure, and each part is fixed by a non-bonding method.

[0042] Optionally, each part of the guiding component is inserted and fitted, and at least one of clamping, threading, and interference is used to fix each part to each other at the insertion part.

[0043] Optionally, the joint between each part of the guide component is completely hidden in the sliding groove.

[0044] Optionally, the guide component is split into two parts.

[0045] The main body is split into two parts, each part having one of the limiting heads.

[0046] Alternatively, the main body and one of the limiting heads are split into two parts.

[0047] Optionally, one of the two parts of the main body is provided with a locking tongue, and the other part is provided with a slot for cooperating with the locking tongue.

[0048] Optionally, the main body and one of the limiting heads are split into two parts, one of the two parts is provided with a locking tongue, and the other part is provided with a slot for cooperating with the locking tongue.

[0049] Optionally, the outer wall of the guide component is provided with a second locking tooth for cooperating with the inner wall of the sliding groove.

[0050] The application also provides an operation method of the compression device.

[0051] The compression device comprises at least two clamp units, each clamp unit being sequentially inserted into the working channel through a comb-shaped structure, and each adjacent clamp unit being provided with a corresponding sliding groove.

[0052] A plurality of guide components are arranged in the corresponding sliding grooves of the adjacent clamp units, respectively, for guiding the relative movement of the clamp units to adjust the size of the working channel.

[0053] The operation method comprises the following steps.

[0054] In step S100, the positions of the clamp units are adjusted so that the working channel can accommodate the interventional instrument.

[0055] In step S200, a driving force is applied to at least one of the clamp units to make the clamp units move relative to each other to compress the interventional instrument.

[0056] In step S300, the driving force is released, and the inner wall of the sliding groove interacts with the guide component to lock the clamp units at the current position.

[0057] Optionally, the interventional instrument is made of elastic material, and provides a springback force for driving the clamp units to be locked when the driving force is released.

[0058] Optionally, when the driving force is released, the relative positions of at least two of the clamp units are changed.

[0059] Optionally, the steps S200-S300 are executed cyclically, and the number of cycles is 2-5 times until the interventional instrument meets the expected radial dimension.

[0060] Optionally, the steps S200-S300 are executed cyclically, and the variation range of the working channel in each cycle is 15-50%.

[0061] Optionally, the variation range of the working channel in each cycle is independent.

[0062] The specific beneficial technical effects will be further explained in the specific embodiments in combination with specific structures or steps. BRIEF DESCRIPTION OF DRAWINGS

[0063] Figure 1a A structural schematic diagram of the compression device in an embodiment of the present application is shown in the figure.

[0064] Figure 1b A front view of the compression device in another embodiment of the present application is shown in the figure.

[0065] Figure 1c A structural schematic diagram of the compression device in an embodiment of the present application is shown in the figure.

[0066] Figure 1d A structural schematic diagram of the interventional instrument in an embodiment of the present application is shown in the figure.

[0067] Figure 1e A structural schematic diagram of the interventional instrument after compression is shown in the figure. Figure 1d

[0068] A top view of the compression device is shown in the figure. Figure 2 Figure 1c A structural schematic diagram of the compression device is shown in the figure.

[0069] Figure 3 Figure 1a A structural schematic diagram of the compression device is shown in the figure.

[0070] Figure 4 A structural schematic diagram of the compression device in an embodiment of the present application is shown in the figure.

[0071] Figure 5 A structural schematic diagram of the unit piece is shown in the figure. Figure 4

[0072] A structural schematic diagram of the cooperation between the guide component and the sliding groove in one of the embodiments of the present application is shown in the figure. Figure 6

[0073] A structural schematic diagram of the cooperation between the guide component and the sliding groove in one of the embodiments of the present application is shown in the figure. Figure 7

[0074] A structural schematic diagram of the cooperation between the guide component and the sliding groove in one of the embodiments of the present application is shown in the figure.​​Figure 8 Structure diagram of the cooperation between the guide component and the sliding slot in one of the embodiments of the present application;

[0075] Figure 9 Structure diagram of the cooperation between the guide component and the sliding slot in one of the embodiments of the present application;

[0076] Figure 10a Structure diagram of the cooperation between the guide component and the sliding slot (linear) in one of the embodiments of the present application;

[0077] Figure 10b Structure diagram of the cooperation between the guide component and the sliding slot (linear) in one of the embodiments of the present application; Figure 10a Structure diagram of the cooperation between the guide component and the sliding slot (linear) in one of the embodiments of the present application;

[0078] Figure 11 Structure diagram of the cooperation between the guide component and the sliding slot in one of the embodiments of the present application;

[0079] Figure 12 Structure diagram of the cooperation between the guide component and the sliding slot in one of the embodiments of the present application;

[0080] Figure 13a Structure diagram of the cooperation between the guide component and the sliding slot (arc-shaped slot) in one of the embodiments of the present application;

[0081] Figure 13b Structure diagram of the cooperation between the guide component and the sliding slot (arc-shaped slot) in one of the embodiments of the present application; Figure 13a Structure diagram of the cooperation between the guide component and the sliding slot (arc-shaped slot) in one of the embodiments of the present application;

[0082] Figure 14 Flow chart of the operation method of the compression device in one of the embodiments of the present application;

[0083] Figure 15 Flow chart of the compression method of the interventional instrument in one of the embodiments of the present application.

[0084] The reference signs in the drawings are explained as follows:

[0085] 100, compression device; 101, working channel;

[0086] 10, clamping unit; 11, connecting arm; 111, unit piece; 112, tooth root; 113, tooth part; 114, fixing hole; 12, connecting piece; 13, sliding slot; 13a, sliding slot; 13b, sliding slot; 131, first clamping tooth; 131a, first clamping tooth; 131b, first clamping tooth; 14, intersection area;

[0087] 20, guide component; 21, second clamping tooth; 22, main body part; 23, limiting head; 24, locking tongue; 241, clamping part; 25, clamping slot; 251, limiting step; 252, guide inclined surface;

[0088] 30, increased friction zone; 40, interventional instrument; 41, stent. DETAILED DESCRIPTION

[0089] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0090] It should be noted that when a component is referred to as being "connected" with another component, it can be directly connected with the other component or there can be a middle component. When a component is referred to as being "disposed on" another component, it can be directly disposed on the other component or there can be a middle component.

[0091] 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 terms "and / or" includes any and all combinations of one or more of the associated listed items.

[0092] Reference will now be made to the drawings, wherein Figure 1a To the drawings Figure 2 As shown in the drawings, the present application discloses a compression device 100, comprising at least two clamp units 10 and a plurality of guide components 20, each clamp unit 10 is sequentially inserted into a closed ring structure through a comb structure, and the center of the ring structure is a working channel 101; each adjacent clamp unit 10 is provided with a corresponding sliding groove 13, and each guide component 20 is arranged in the corresponding sliding groove 13 of the adjacent clamp unit 10 to guide the relative movement of each clamp unit 10 to scale the working channel 101.

[0093] The compression device 100 is used for compressing and holding the interventional instrument 40. The interventional instrument 40 is not strictly limited in specific shape, for example, it can include a stent, which has a connecting ear at one end in the axial direction, and the stent is a radially compressible or expandable structure, which is generally a mesh tube structure formed by cutting or weaving. In this embodiment, for the convenience of description, the interventional instrument 40 takes an artificial heart valve as an example, and the release of the interventional instrument 40 in the body can adopt a self-expanding or balloon-expanding mode, and the material is correspondingly matched.

[0094] The compression device 100 has a thickness direction (such as the direction of the arrow A in the drawing) in space, and the working channel 101 is arranged in the thickness direction. Figure 2The shape of the compression device 100 is adjusted according to the number of jaw units 10. For example, when there are two jaw units 10, the outer contour of the compression device 100 is generally rectangular; when there are three jaw units 10, the outer contour of the compression device 100 is generally triangular. These details will not be elaborated here. The following embodiments are described based on the case where there are three jaw units 10.

[0095] The extension direction of the working channel 101 is consistent with the thickness direction of the compression device 100, and the two ends of the working channel 101 are open on both sides of the compression device 100 along its own thickness direction; when the radial dimension of the working channel 101 shrinks, the inner wall of the working channel 101 abuts against the peripheral wall of the interventional instrument 40, so that the interventional instrument 40 has a tendency to shrink radially.

[0096] For example, Figure 1d To the attached Figure 1e In the figure, the interventional device 40 includes a cylindrical stent 41. The stent 41 can generally be formed by cutting or weaving. In order to achieve radial deformation, it is mostly a grid structure.

[0097] like Figures 3 to 5 As shown, each clamping unit 10 includes a plurality of stacked and fixed unit pieces 111, and the plurality of unit pieces 111 are divided into two groups. The unit pieces of each group are arranged in sequence along the extension direction of the working channel 101 and constitute a connecting arm 11. In the same connecting arm 11, two adjacent unit pieces 111 are independently configured. Among them, the independent configuration of two adjacent unit pieces 111 can be understood as: the two adjacent unit pieces 111 are separately set and independently processed. The plurality of unit pieces 111 can be cut and processed from a whole sheet of material, which improves efficiency and reduces equipment requirements, and the assembly is simple and flexible. If the connecting arm 11 or the entire clamping unit 10 is set as an integral part, it is necessary to use complex external equipment (such as a machining center) to process the comb-like structure.

[0098] The position of the slide slots 13 on each unit piece 111 in the same connecting arm 11 is consistent. There is no strict limit on the number of units 111 in each unit piece group, and the number can be three, four, five, six, or more. The unit pieces 111 can be of the same shape and size to improve standardization. Similarly, the shape and size of each clamping unit 10 can also be the same.

[0099] In the figure, one side of the unit piece 111 is a tooth root 112 (tooth root 112 is roughly strip-shaped), and the remaining portion is a tooth portion 113 (roughly triangular plate-shaped), wherein the slide slot 13 is provided in the tooth portion 113. In the two connecting arms 11 of the same clamping unit 10, the tooth roots 112 of each group of unit pieces 111 are alternately stacked along the thickness direction of the compression device 100 and fixed at the overlapping position by a connecting member 12. The teeth 113 of the unit pieces 111 in the same group are oriented in the same direction and are arranged in a comb-like arrangement at intervals. The teeth 113 of the unit pieces 111 in different groups are oriented in different directions.

[0100] In another embodiment, as Figure 1c The clamp unit 10 is a unitary structure, i.e. each unit piece 111 is integrally formed.

[0101] In this embodiment, the sliding grooves 13 on the two connecting arms 11 in the same clamp unit 10 are arranged at an angle of 60 degrees. The sliding groove 13 is generally strip-shaped, and has a length direction and a width direction in space; the two ends of the length direction of the sliding groove 13 can limit the limit positions of the guide component 20 to correspond to the limits of the expansion of the working channel 101.

[0102] The existing compression device with similar structure is difficult to maintain the current state during use. For example, when the operator expands the working channel 101, the clamp unit 10 may move relatively synchronously under the action of gravity and shrink the working channel 101 when the driving force on the clamp unit 10 is removed; or when the compression device 100 grips the interventional instrument 40, the compressed interventional instrument 40 has a counterforce, and the interventional instrument 40 expands immediately to release the current shape and cannot be intermittently operated or needs additional tool cooperation once the driving force on the clamp unit 10 is removed. In order to solve the technical problem, the present application provides a clamping structure between the sliding groove 13 and the guide component 20. When the external force on the compression device 100 is stopped, the guide component 20 and the sliding groove 13 can be maintained in the current state by the clamping structure, so as to facilitate the gripping of the interventional instrument 40.

[0103] The clamping structure in this embodiment is a first clamping tooth 131 distributed on the inner edge of the sliding groove 13, and the one-side inner wall or both-side inner walls of the sliding groove 13 have the first clamping tooth 131 along the width direction of the sliding groove 13.

[0104] The sliding grooves 13 of adjacent clamp units 10 always have an intersection area to accommodate the two sliding grooves 13 of the guide component 20. During the use of the compression device, if the driving force on the clamp unit 10 is released, the adjacent clamp units may move relatively under the action of the rebound of the interventional instrument or gravity, and the guide component 20 may also change position relative to the intersection area. In any case, the intersection area will generally be locally narrowed, i.e. have a width change, so that the inner edge of the sliding groove 13 interacts with the guide component 20. Due to the existence of the first clamping tooth 131, the further movement of the guide component 20 or the further change of the intersection area can be limited in a very short time, i.e. self-locking is completed, and each clamp unit 10 can be maintained at the current position. At this time, the operator is allowed to release the compression device 100 to perform other operations without affecting the previous operation process.

[0105] The first tooth 131 in the present application is to provide the necessary friction to prevent the guide component from being clamped and slipping off by itself, so the tooth shape, tooth height, etc. of the first tooth are not strictly limited, and the first tooth is arranged along the extension direction of the sliding groove to facilitate self-locking at multiple positions, but it is not required to be distributed in all areas of the side wall.

[0106] As for the intersection region with width variation, dynamic and static methods can be adopted. Taking the dynamic method as an example, each jaw unit has a movement direction pointing to the center of the working channel, which is generally the expected driving force direction. Adjacent two jaw units have an active clearance deviating from the movement direction, and the intersection region has a width variation through the active clearance. Even if the sliding grooves of the two jaw units are the same width and collinear, due to the existence of the active clearance, when one jaw unit is deflected relative to the other, the width variation of the intersection region will occur.

[0107] Taking the static method as an example, the sliding groove on at least one of the adjacent two jaw units has a different extension trend from the movement direction of the jaw unit, so that the intersection region has a width variation. For example, when the sliding groove of a jaw unit is a curve, it is particularly intuitive (specific analysis is given below).

[0108] For the same jaw unit 10, the two connecting arms 11 form a 120-degree angular slot on one side of the working channel 101; in adjacent two jaw units 10, the two connecting arms 11 connected to each other form a 120-degree angular slot on one side of the working channel 101. The radial cross section of the working channel 101 formed by each jaw unit 10 is a polygon, for example Figure 1a , the radial cross section is a regular hexagon, and for example Figure 1b , the radial cross section is a circle (initial state as an example). During the synchronous movement of the jaw units 10 to contract the working channel 101, the radial cross section of the working channel 101 always remains a regular hexagon or a circle. When the number of jaw units 10 changes, the related angles are adjusted accordingly. The number of jaw units 10 in the figure is three. When the radial cross section of the working channel 101 is a circle, the number of jaw units 10 can also be five, six, etc.

[0109] In the present embodiment, the connecting member 12 is columnar as a whole (for example, a pin or a bolt), and the axis of the connecting member 12 extends along the thickness direction of the compression device 100. The tooth root 112 part on each unit piece 111 is provided with a corresponding fixed hole 114, and the connecting member 12 is fixed or detachably arranged in each fixed hole 114. Preferably, the number of connecting members 12 is at least two, and each connecting member 12 is arranged along the radial direction of the working channel 101.

[0110] In another embodiment, the jaw unit 10 comprises:

[0111] A plurality of unit pieces are stacked along the thickness direction of the compression device 100;

[0112] A plurality of isolation pads are arranged between the unit pieces adjacent along the thickness direction of the compression device 100, and the unit pieces are arranged at intervals to form the comb structure.

[0113] The unit piece has a tooth root (the shape of the tooth root is generally strip-shaped) located in the middle, and tooth portions (the shape is generally triangular plate) located on the opposite sides of the tooth root; the tooth portions on the same side are arranged at intervals to form the comb structure, and the tooth portions on the different sides are different in direction.

[0114] The sliding grooves are arranged on the tooth portions; the positions of the sliding grooves on the tooth portions on the same side are consistent; and the extending directions of the sliding grooves on the tooth portions on the different sides are arranged at 60 degrees.

[0115] The isolation pad is located at the tooth root of the unit piece, and the two sides of the isolation pad are respectively in contact with the corresponding unit pieces to support the adjacent unit pieces, so that each part of the unit piece is arranged at intervals.

[0116] In the same clamping unit, the tooth roots of the unit pieces are fixed by the connecting piece.

[0117] The upper tooth root portion of each unit piece and the support pad are provided with corresponding fixed holes, and the connecting piece is fixed or detachably arranged in the fixed holes.

[0118] In order to avoid the slipping of the compression device 100 during use, it is inconvenient to apply force, as shown in Figure 4 and Figure 5 , at least one outer side of the clamping unit 10 is provided with a friction increasing area 30.

[0119] The compression device 100 is usually in a standing state in Figure 4 during use, so as to press down the clamping unit at the top, and at this time, the two clamping units at the bottom are arranged on the workbench surface and move relatively, in order to reduce the friction with the workbench surface, the outer sides (relative to the work channel) of the two clamping units at the bottom are smooth surface structures.

[0120] The surface of the friction increasing area 30 is rough or provided with sawtooth patterns. The specific position or area of the friction increasing area 30 is not strictly limited, and is generally arranged at the contact position during operation. In order to ensure the smooth compression, the friction coefficient of the friction increasing area 30 is greater than the friction coefficient of the inner wall of the sliding groove 13 and the friction coefficient of at least the part of the guide component 20 in contact with the inner wall of the sliding groove 13.

[0121] In an embodiment, as shown in Figure 6 , the guide component 20 is a split structure, including at least two parts, and the parts are fixed by a mechanical structure matched with each other.

[0122] Two adjacent parts of the guide component 20, one of which is provided with a slot structure, and the other is provided with a matching part extending into the slot structure, are fixed by snap, thread or interference between the slot structure and the matching part.

[0123] The spliced part of each part of the guide component 20 has a gap, which may cause certain health and safety problems if exposed outside the compression device 100. In order to solve this technical problem, the spliced part of each part of the guide component 20 is located in the sliding groove, so as to avoid the gap exposed outside the compression device 100.

[0124] In the thickness direction of the compression device 100, the guide component 20 includes a main body part 22 and two limiting heads 23, the main body part 22 is located in the sliding groove 13 and extends out of the sliding groove 13 at both ends, and the two limiting heads 23 are fixed at both ends of the main body part 22 and located outside the clamping unit 10.

[0125] Among them, the maximum size of the limiting head 23 is greater than the width of the sliding groove 13, so as to limit the main body part 22 in the sliding groove 13. Preferably, the minimum size of the limiting head 23 is greater than the width of the sliding groove 13 (i.e. the width of the limiting head is greater than the width of the sliding groove 13 everywhere).

[0126] The axis of the main body part 22 extends in the thickness direction of the compression device 100. The cross section of the main body part 22 can be circular or polygonal.

[0127] As for the main body part 22 itself, it can be integrated or divided into two parts, and in order to facilitate installation, the main body part 22 includes two parts distributed in the axial direction, and the two parts are fixed to each other by at least one of bonding, sleeving, inserting and screwing. The main body part and the corresponding limiting head are integrated.

[0128] For example, the main body part 22 includes two unit elements, each of which has one limiting head 23; the two unit elements are two segments in the axial direction of the main body part 22; one of the unit elements is provided with a lock tongue 24 as a matching part, and the other unit element has a clamping groove 25 matched with the lock tongue 24.

[0129] Alternatively, the main body part 22 and one of the limiting heads 23 are in a separate structure, and one of the main body part 22 and one of the limiting heads 23 is provided with a lock tongue 24 as a matching part, and the other has a clamping groove 25 matched with the lock tongue 24.

[0130] The specific cooperation between the locking tongue 24 and the clamping groove 25 is described with reference to an embodiment. The inner wall of the clamping groove 25 is provided with a limiting step 251, and the locking tongue 24 includes two oppositely arranged clamping portions 241 that can deform by themselves. The two clamping portions 241 move towards each other during the process of passing through the opening of the clamping groove 25, until they completely pass over the limiting step 251, and then each clamping portion 241 resets and is clamped in the clamping groove 25 under the action of the limiting step 251. The inner wall of the opening of the clamping groove 25 has a guide slope 252 that guides the locking tongue 24 to enter.

[0131] As shown in Figures 7 to 12 , the single-sided inner wall or both-sided inner wall of the sliding groove 13 is provided with first clamping teeth 131 arranged along the extension direction of the sliding groove 13. In the same connecting arm 11, the sliding groove 13 in at least one unit piece 111 is provided with the first clamping teeth 131.

[0132] Taking two gripper units as an example, when the gripper units are compressed to approach each other to intervene in the instrument, the relative movement direction and the spatial relative posture of the two gripper units should be kept stable, and the guide component will move smoothly in the sliding groove. When the operation needs to be paused, the driving force on the gripper units can be released, for example Figure 7 , the sliding groove 13a and the sliding groove 13b cooperate with the guide component 20, the sliding groove 13a and the sliding groove 13b are staggered with each other, and the first clamping teeth of at least one sliding groove are clamped with the guide component 20.

[0133] In order to improve the sensitivity of self-locking, a second clamping tooth 21 that meshes with the first clamping tooth can also be arranged on the outer periphery of the guide component 20.

[0134] The shapes of the first clamping teeth 131 and the second clamping teeth 21 can be the same or different, for example, the shapes of the first clamping teeth 131 and the second clamping teeth 21 can be semicircular, triangular, trapezoidal, rectangular, etc.

[0135] In order to adapt to the deflection operation, there is a cooperation gap between the sliding groove 13 and the guide component 20 in the width direction of the sliding groove, and / or the part of the guide component in the sliding groove 13 has a circular or elliptical cross-sectional shape.

[0136] The following embodiments provide various clamping structures and describe the self-locking effect respectively:

[0137] As shown in Figure 7 , the extension path of the sliding groove 13 is linear; along the width direction of the sliding groove 13, the single-sided inner wall of the sliding groove 13 is provided with first clamping teeth 131 arranged along the extension direction of the sliding groove 13 and acting on the guide component 20; and along the length direction of the sliding groove 13, the adjacent first clamping teeth 131 are recesses with a semicircular cross section.

[0138] As shown in Figure 8Along the width direction of the chute 13, the inner wall of one side of the chute 13 is provided with a first latching tooth 131 arranged along the extension direction of the chute 13 and acting on the guide member 20. The cross section of the first latching tooth 131 is semicircular.

[0139] like Figure 9 As shown, the extension path of the chute 13 is linear. Along the width direction of the chute 13, the inner walls of both sides of the chute 13 are provided with first latching teeth 131 arranged along the extension direction of the chute 13 and acting on the guide member 20. In particular, along the length direction of the chute 13, there are grooves with semicircular cross-sections between adjacent first latching teeth 131.

[0140] Combine Figure 4 When the clamping units 10 move relative to each other, the conventional movement path L is toward the working channel, that is, the geometric center P of the compression device as a whole. After the driving force on the clamping units is released, it is difficult for the clamping units 10 to move in the opposite direction strictly according to the movement path L, so self-locking will occur. Of course, one of the clamping units 10 can also be actively deflected so that its movement direction has an angle with the original movement path to ensure the self-locking effect or speed up the self-locking process.

[0141] For example Figure 10a In the embodiment, when the pressing and gripping operation is performed, the slide grooves 13a and 13b are substantially collinear, and the two adjacent clamping units move relative to each other in the direction indicated by the arrows in the figure, and the guide member 20 can move adaptively in the intersection area 14;

[0142] like Figure 10b After the driving force is released, the slide grooves 13a and 13b form an angle, and the shape of the intersection area 14 changes accordingly to restrict the guide member 20, so that the two clamping units cannot be self-locked along Figure 10b Move in the direction of the middle arrow to keep the crimping device and the interventional instrument in the current state. The same applies to the other clamping units to complete self-locking.

[0143] like Figure 11 As shown, the extension path of the slide groove 13 is arc-shaped. Along the width direction of the slide groove 13, the inner wall of one side of the slide groove 13 has a first latch 131 arranged along the extension direction of the slide groove 13 and acting on the guide component 20; wherein, along the length direction of the slide groove 13, there is a groove with a semicircular cross-section between adjacent first latches 131.

[0144] like Figure 12As shown, the extension path of the sliding groove 13 is arc-shaped, the width of the sliding groove 13 gradually decreases from the middle to both ends, the diameter of the guide component 20 is larger than the narrowest part of the sliding groove 13; along the width direction of the sliding groove 13, the single-side inner wall of the sliding groove 13 is provided with first clamping teeth 131 arranged along the extension direction of the sliding groove 13 and acting on the guide component 20; wherein, along the length direction of the sliding groove 13, the adjacent first clamping teeth 131 are provided with a groove with a semicircular cross section.

[0145] When the sliding groove is arc-shaped, the self-locking mode is referred to Figure 13a and Figure 13b Compared with the linear sliding groove, in the embodiment, the sliding groove 13 is arc-shaped, and after the driving force on the clamp unit is released, even if each clamp unit 10 moves reversely along the original movement path L, the intersection area will change, and thus self-locking occurs.

[0146] In the adjacent two clamp units, one can adopt a linear sliding groove, and the other can adopt an arc-shaped sliding groove.

[0147] Based on the compression device 100 in the above embodiments, the present specification provides an operation method of the compression device, which specifically includes:

[0148] As Figure 14 , in step S100, one of the clamp units 10 is driven, and each clamp unit 10 moves relatively synchronously under the guidance of the guide component 20, the position of each clamp unit 10 is adjusted, the working channel 101 can accommodate the interventional instrument 40, the interventional instrument 40 is placed in the working channel 101, and the axial direction of the interventional instrument 40 is arranged in parallel with the axial direction of the working channel 101.

[0149] In step S200, a driving force is applied to at least one of the clamp units 10, and each clamp unit 10 moves relatively synchronously under the guidance of the guide component 20, each clamp unit 10 shrinks the working channel 101, and the inner wall of the working channel 101 compresses the interventional instrument 40 to a predetermined size (for example, the diameter of the interventional instrument 40 is compressed from 2 cm to 1 cm).

[0150] In step S300, the driving force is released, and each clamp unit 10 is self-locked at the current position.

[0151] During the whole process, whether the working channel 101 is pre-expanded or gradually shrunk, when it is necessary to pause (for example, to adjust the posture of the interventional instrument 40 or to implement auxiliary operations), each clamp unit 10 can be locked at the current relative position through the clamping between the guide component 20 and the sliding groove 13, that is, the interaction between the guide component and the inner wall of the sliding groove provided with the clamping teeth for self-locking of the clamp unit, at this time, the operator is allowed to loosen the compression device 100 to perform other operations without affecting the previous operation process.

[0152] Wherein, the interventional instrument is made of elastic material, and the elastic force provided when the driving force is released helps the self-locking of the driving jaw unit 10. When the driving force is released, one of the jaw units 10 can also be actively deflected, and before the deflection, the jaw unit 10 has a relative first movement path with respect to the geometric center of the operation channel; a deflection force is applied to the jaw unit 10, and the force direction of the deflection force has an included angle with the first movement path.

[0153] In an embodiment, steps S200-S300 are cyclically executed, and the number of cycles is 2-5 times, until the interventional instrument meets the expected radial size. In each cycle, the change range (in terms of radial size) of the working channel is 15-50%, and the change ranges of the working channel in each cycle are independent of each other.

[0154] Based on the compression device 100 in the above embodiments, the present specification also provides a compression method for an interventional instrument using a compression device, and the compression method comprises:

[0155] As Figure 15 Step S100, placing the interventional instrument in the working channel;

[0156] Step S200, applying a driving force to at least one of the jaw units, so that the relative movement of the jaw units compresses the interventional instrument;

[0157] Step S300, releasing the driving force, and the jaw units are self-locked accordingly to keep the interventional instrument in the current shape.

[0158] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present specification as long as there is no contradiction. When the technical features in different embodiments are embodied in the same figure, it can be considered that the figure also discloses the combination of the embodiments involved.

[0159] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application.

Claims

1. A compression device for an interventional instrument, characterized in that: include: At least two clamping units, each clamping unit is sequentially interlaced through a comb-like structure to form a working channel, and adjacent clamping units are provided with corresponding sliding grooves; A plurality of guide members, each guide member being placed in a corresponding slide groove at an adjacent clamping unit position, for guiding the relative movement of each clamping unit to expand and contract the working channel; The engaging structure includes a first latching tooth acting on the guide component, wherein the first latching tooth is arranged on the inner wall of the sliding groove along the extending direction of the sliding groove.

2. The compression device of the interventional instrument according to claim 1, characterized in that: Along the width direction of the sliding groove, the sliding groove has two opposite side walls, and the first latching teeth are distributed on one of the side walls or on both side walls.

3. The compression device of the interventional instrument according to claim 1, characterized in that: The shapes of the slide grooves of two adjacent clamping units are independently configured, the slide grooves are strip-shaped and the extension paths are straight-line or arc-shaped.

4. The compression device of the interventional instrument according to claim 1, characterized in that: The width of the chute gradually decreases from the middle of the chute to both ends of the chute.

5. The compression device of the interventional instrument according to claim 1, characterized in that: The sliding grooves of two adjacent clamping units partially overlap and form an intersection area for accommodating the guide component, and the intersection area has a varying width.

6. The method for operating a compression device according to claim 5, characterized in that: Each clamping unit has a movement direction pointing to the center of the working channel, and there is a movable clearance between two adjacent clamping units that deviates from the movement direction, and the intersection area has a width change due to the movable clearance.

7. The method for operating a compression device according to claim 5, characterized in that: Each clamping unit has a movement direction pointing to the center of the working channel. Among two adjacent clamping units, the sliding groove on at least one clamping unit has a different extension trend from the movement direction of the clamping unit, so that the intersection area has a width change.

8. The compression device of the interventional instrument according to claim 1, characterized in that: The clamping unit includes a plurality of unit pieces arranged along the thickness direction of the compression device, the plurality of unit pieces are divided into two groups, and each group constitutes a connecting arm; The unit pieces are integrally formed or stacked and fixed separately.

9. The compression device of the interventional instrument according to claim 8, characterized in that: Each unit piece has opposite tooth roots and tooth portions, wherein the tooth portions are provided with the sliding grooves.

10. The compression device of the interventional instrument according to claim 8, characterized in that: In the same connecting arm, two adjacent unit plates are configured independently, and the tooth roots of each group of the unit plates are alternately stacked along the thickness direction of the compression device and fixed by connecting pieces at the stacking position. The teeth of the unit plates in the same group are oriented in the same direction and arranged at intervals to form the comb-like structure.

11. The compression device of the interventional instrument according to claim 10, characterized in that: The connecting member is cylindrical, and the axis of the connecting member extends along the thickness direction of the compression device; For the same clamping unit, the connecting parts are arranged in sequence along the radial direction of the working channel.

12. The compression device of the interventional instrument according to claim 1, characterized in that: An outer side of at least one of the clamping units is provided with a friction-enhancing area.

13. The compression device of the interventional instrument according to claim 1, characterized in that: Along the thickness direction of the compression device, the guide component includes: a main body portion, the main body portion being located in the slide groove and having two ends extending out of the slide groove; The limiting heads are fixed at both ends of the main body and are limited by the sliding groove.

14. The compression device of the interventional instrument according to claim 13, characterized in that: The main body of the guide component includes two parts distributed axially, and the parts are fixed to each other by at least one of bonding, sleeve connection, plug connection and thread connection.

15. The compression device of the interventional instrument according to claim 14, characterized in that: The main body and one of the limiting heads are an integral structure.

16. The compression device of an interventional instrument according to any one of claims 1 to 15, characterized in that: The outer wall of the guide component is provided with a second latching tooth that acts on the inner wall of the sliding groove.

17. A method for operating a compression device, characterized in that: The compression device comprises: At least two clamping units, each clamping unit is sequentially interlaced through a comb-like structure to form a working channel, and adjacent clamping units are provided with corresponding sliding grooves; A plurality of guide members, each guide member being placed in a corresponding slide groove at an adjacent clamping unit position, for guiding the relative movement of each clamping unit to expand and contract the working channel; The operation method includes: Step S100, adjusting the position of each clamping unit so that the working channel can at least accommodate the interventional instrument; Step S200, applying a driving force to at least one of the clamping units to cause the clamping units to move relative to each other to compress the interventional instrument; Step S300: releasing the driving force, and the inner wall of the sliding groove interacts with the guide component to self-lock the clamping unit in the current position.

18. The method for operating a compression device according to claim 17, characterized in that: The interventional instrument is made of an elastic material and provides a rebound force driving the clamping unit to self-lock when the driving force is released.

19. The method for operating a compression device according to claim 17, wherein: When the driving force is released, the relative postures in space of at least two of the clamping units are changed.

20. The method for operating a compression device according to claim 17, wherein: Steps S200 to S300 are executed cyclically for 2 to 5 times until the interventional device meets the expected radial size.

21. The method for operating a compression device according to claim 17, wherein: The steps S200 to S300 are executed cyclically, and in each cycle, the change range of the working channel is 15-50%.

22. The method for operating a compression device according to claim 21, characterized in that: In each cycle, the amplitudes of changes in the working channels are independent of each other.

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