CN213250077U - Self-expanding stent system and control handle thereof - Google Patents

Abstract

The utility model provides a self-expanding bracket system and a control handle thereof, the self-expanding bracket system comprises a control handle, a bracket component and an outer tube component, the bracket component comprises a first bracket and a second bracket, the outer tube component comprises a first outer tube sleeved outside the first bracket and a second outer tube sleeved outside the second bracket, the control handle comprises a shell, a first driving component for driving the first outer tube to move relative to the first bracket and a second driving component for driving the second outer tube to move relative to the second bracket, the first outer tube and the second outer tube can be respectively controlled, the first bracket and the second bracket with two same or different specifications can be released at two opposite sides of a cutting head, the brackets with different specifications can be combined according to the number and the size of pathological changes to treat a plurality of pathological changes, the situations of multi-instruments and multi-implantation are avoided, and the operation difficulty of an operation is reduced, shortens the operation time and reduces the treatment cost.

Description

Self-expanding stent system and control handle thereof

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to from expanding mounting system and brake valve lever thereof.

Background

Stenosis and blockage of the lumen, atherosclerosis, calcified lesions, dissections and the like are common tube diseases, and serious damage to the cardiovascular system, the cerebrovascular system, the respiration system, the digestion system, the urinary system and the endocrine system can be caused without timely treatment and operation, so that the life is endangered if necessary. Lumen stenting is an important, and even major, treatment tool and tool for treating such diseases.

Conventional stent systems employ a single long stent compressed in a delivery system and then delivered by the delivery system to the lesion. The stent system can open the occluded blood vessel to achieve the purposes of restoring the lumen of the blood vessel and the flow of blood, and prevent restenosis caused by vasoconstriction. However, the lesion of the artery of the lower limb is generally long, and includes complex and severe physiological loads such as tension, bending, torsion, compression, pulsation, etc., and since the occlusive lesion of the artery of the lower limb is long and the number of dissections is large, in the prior art, one long stent or a plurality of short stents are generally implanted to cover all the dissections. However, if a long stent is implanted, the amount of metal implantation increases, and it is difficult to cope with various complicated and severe physiological loads, and the long-term treatment effect is not good; if a plurality of short stents are implanted, a plurality of sets of instruments are needed to be implanted for a plurality of times, thereby greatly increasing the operation time and cost.

In the chinese patent application with publication number CN108852575A, it discloses a closed from multisection application operating system of inflation unit support, it includes interior sleeve pipe subassembly, outer tube subassembly and Y connector, still including locating bracket component part on the operating element part, bracket component part includes the multisection unit support and a plurality of being used for stable release to correspond the anti-jump subassembly of unit support, unit support with anti-jump subassembly is located on the interior sleeve pipe subassembly, adopt this system can have the ability of single loading, transport and release a plurality of supports simultaneously to can provide stable safe, visual release and the characteristics of creating a little during the use.

However, in this solution, the unit holder has only one release outlet, and all the unit holders have to be released from one release outlet, and the release direction of the unit holder cannot be controlled from the outside, and it is not able to adapt to the independent release of a plurality of unit holders with different specifications.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a from expanding mounting system and brake valve lever thereof to solve among the prior art and can't control the release direction of unit support from the outside, can not adapt to the technical problem of the independent condition of releasing of unit support of multiple different specifications.

In order to achieve the above object, the utility model adopts the following technical scheme: the control handle is applied to a self-expanding bracket system, the self-expanding bracket system comprises a first bracket, a second bracket, a first outer pipe coated on the outer side of the first bracket and a second outer pipe coated on the outer side of the second bracket, and the control handle comprises a shell, a first driving member for driving the first outer pipe to move relative to the first bracket, and a second driving member for driving the second outer pipe to move relative to the second bracket, wherein the first driving member is arranged in the shell and comprises a first driving piece; the second driving member is disposed inside the housing, and the second driving member includes a second driving member.

Further, the first driving member further comprises a first rack and a first gear, the first gear is fixedly connected with the first driving member, the first rack is meshed with the first gear, and the first rack is connected with the first outer tube.

Furthermore, a middle-layer pipe and an inner pipe are arranged on the inner side of the first outer pipe, the inner pipe slides in the middle-layer pipe, the inner pipe is fixedly connected with the first outer pipe through a connecting end, and the first rack is fixedly connected with the inner pipe.

Further, still include the fixing base, the fixing base is fixed the intermediate layer pipe with the inside wall of casing.

Further, the second driving member further comprises a second rack and a second gear, the second gear is fixedly connected with the second driving member, the second rack is meshed with the second gear, and the second rack is connected with the second outer tube.

Further, the tip of casing is equipped with the pillar, the outer pipe of second is located in the pillar and with pillar sliding connection.

Further, the first driver is located at a proximal end of the second driver.

Furthermore, the first driving part and the second driving part both adopt shifting wheels, and one end of each shifting wheel protrudes out of the shell.

The utility model also discloses a from expanding mounting system, include: the control handle, the bracket component and the outer tube component are as above, the bracket component comprises a first bracket and a second bracket, the outer tube component comprises a first outer tube sleeved outside the first bracket and a second outer tube sleeved outside the second bracket, the first outer tube is connected with the first driving member, and the second outer tube is connected with the second driving member.

Further, the inner tube assembly comprises an inner tube and a middle tube sleeved outside the inner tube, the inner tube is connected with the first driving member and slides in the middle tube, and one end of the first outer tube is fixedly connected with the inner tube.

The utility model provides a from expanding support system and brake valve lever's beneficial effect lies in: compared with the prior art, the utility model discloses a brake valve lever, can be respectively control first outer tube and second outer tube, make first outer tube of first drive component control remove for first support, first support can be released promptly, the steerable second outer tube of second drive component removes for the second support, the second support can be released promptly, the first support and the second support that realize two kinds of the same or different specifications can be in the relative both sides release of cutting apart the head, can be according to pathological change quantity, the support of the different specifications of big or small combination use, treat a plurality of pathological changes, the condition of having avoided many apparatus and implanting many times, the operation degree of difficulty of operation has been reduced, operation time has been shortened, treatment cost has been reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a self-expanding stent system provided by an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a distal end of a self-expanding stent system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first bracket or a second bracket adopted in the embodiment of the present invention;

fig. 4 is a schematic structural diagram of a control handle according to an embodiment of the present invention.

Description of reference numerals:

1. a control handle; 2. an inner tube assembly; 3. a dividing head; 4. an outer tube assembly; 5. a first bracket; 6. a second bracket; 7. a first hanging member; 8. a second hanging member; 11. a housing; 12. a first drive member; 13. a second drive member; 14. protecting the pipe; 15. a fixed seat; 121. a first driving member; 122. a first rack; 123. a first gear; 131. a second driving member; 132. a second rack; 133. a second gear; 21. an inner tube; 22. a middle-layer pipe; 23. a connecting end; 231. a guiding conical surface; 31. a step surface; 41. a first outer tube; 42. a second outer tube.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In this document, "proximal" and "distal" are relative orientations, relative positions, and relative directions of elements or actions with respect to each other from the perspective of a physician using the medical device, although "proximal" and "distal" are not limiting, but "proximal" generally refers to the end of the medical device that is near the physician during normal operation, and "distal" generally refers to the end that enters the patient's body first.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and fig. 2, the self-expanding stent system of the present invention will now be described. The self-expansion support system comprises a control end, an inner pipe assembly 2 and an outer pipe assembly 4, wherein the outer side of the inner pipe assembly 2 is sleeved with the outer pipe assembly 4, the inner pipe assembly 2 and the outer pipe assembly 4 can be arranged inside a human body, the control end is located outside the human body, and the control end can control the inside.

Further, please refer to fig. 1 to fig. 4 together, as a specific embodiment of the self-expanding stent system provided by the present invention, the control end adopts a control handle 1, the control handle 1 is disposed at the proximal end of the outer tube assembly 4, and the control handle 1 is connected to the second outer tube 42 and the inner tube 21 respectively.

The control handle 1 comprises a housing 11, a first driving member 12 for driving the first outer tube 41 to move relative to the first bracket 5, and a second driving member 13 for driving the second outer tube 42 to move relative to the second bracket 6, wherein the first driving member 12 and the second driving member 13 are both arranged inside the housing 11, and the first driving member 12 comprises a first driving member 121, and the second driving member 13 comprises a second driving member 131.

Wherein, the shell 11 generally refers to the shell 11 of the handle, and the inside is hollow structure, and has a plurality of arcwall faces in appearance, can be convenient for the handheld of operating personnel. Wherein the first driving member 12 is indirectly connected with the first outer tube 41, the first driving member 12 is used for driving the first outer tube 41 to move towards the far end, the second driving member 13 is directly connected with the second outer tube 42, and the second driving member 13 is used for driving the second outer tube 42 to move towards the near end, so that the first stent 5 and the second stent 6 can respectively bulge out from two sides of the dividing head 3.

Further, the first driving member 12 further includes a first rack 122 and a first gear 123, the first gear 123 is fixedly connected to the first driving member 121, the first rack 122 is engaged with the first gear 123, and the first rack 122 is connected to the first outer tube 41 through the inner tube 21 and the connecting end 23. The rotation of the first driving member 121 drives the rotation of the first gear 123, and the conversion of the rotational energy and the linear motion energy is realized by the engagement of the first gear 123 and the first rack 122. Wherein, according to actual conditions and specific demand, in the utility model discloses other embodiments, can also adopt the structure of turbine and worm or the lead screw structure to realize the conversion of rotational energy and linear motion ability, do not do only limit here.

Preferably, the first driving member 121 is a thumb wheel, the outer edge of the thumb wheel has a plurality of protrusions for increasing friction, and the operator holds the handle by hand, and the rotation of the thumb wheel can be realized by one of the fingers, so as to realize the movement of the first outer tube 41 toward the distal end. The first driving member 121 may also be directly driven by a rotation driving member such as a motor or a motor, or a driving member such as a handwheel, which is not limited herein.

Further, the second driving member 13 further includes a second rack 132 and a second gear 133, the second gear 133 is fixedly connected to the second driving member 131, the second rack 132 is engaged with the second gear 133, and the second rack 132 is connected to the second outer tube 42. The rotation of the second driving member 131 drives the rotation of the second gear 133, and the conversion of the rotational energy and the linear motion energy is realized by the engagement of the second gear 133 and the second rack 132. Wherein, according to actual conditions and specific demand, in the utility model discloses other embodiments, can also adopt the structure of turbine and worm or the lead screw structure to realize the conversion of rotational energy and linear motion ability, do not do only limit here.

Preferably, the second driving member 131 is a thumb wheel, the outer edge of the thumb wheel has a plurality of protrusions for increasing friction, and the operator holds the handle by hand, and the rotation of the thumb wheel can be realized by one of the fingers, so that the first outer tube 41 can move towards the distal end. The second driving member 131 may also be a rotation driving member such as a motor or a motor, or a driving member such as a handwheel, which is not limited herein.

Wherein, first driving piece 121 and second driving piece 131 all adopt the thumb wheel, and two thumb wheels set up side by side on a side of casing 11 to can realize one-hand operation, it is more convenient to control.

Preferably, the end of the housing 11 is provided with a protective tube 14, the second outer tube 42 is disposed in the protective tube 14 and slidably connected to the protective tube 14, the second outer tube 42 is connected to the second rack 132, the inner tube 21 is also disposed inside the second outer tube 42, and the inner tube 21 is connected to the first rack 122 through the protective tube 14.

Preferably, the first driving member 121 is located at the proximal end of the second driving member 131, that is, the first driving member 12 is located at a side of the housing 11 close to the protection tube 14, the second driving member 13 is located at a side of the housing 11 away from the protection tube 14, both the inner tube 21 and the middle tube 22 can pass through a side of the first driving member 12, a fixing seat 15 is disposed at an outer side of the middle tube 22, the fixing seat 15 can be fastened at an outer side of the middle tube 22 and fixedly connected with an inner side wall of the housing 11, so that a position of the middle tube 22 is fixed relative to a position of the driving handle, and the inner tube 21 can slide in the middle tube 22 under driving of the second driving member 13.

Further, please refer to fig. 2, as a specific embodiment of the self-expanding stent system provided by the present invention, the inner tube assembly 2 includes an inner tube 21 and a middle tube 22 sleeved outside the inner tube 21, the inner tube 21 is connected with the control handle 1 and slides in the middle tube 22, the inner tube 21 can move back and forth under the control of the control handle 1, and the inner tube 21 drives the second outer tube 42 to move.

The distal end of inner tube 21 is provided with link 23, link 23 and inner tube 21 fixed connection, and the inside of inner tube 21 has the cavity (the attached drawing does not mark) that supplies the seal wire to pass, and the inside of link 23 also has the confession the through-hole (the attached drawing does not mark) that the seal wire passed for medical devices such as seal wire can pass inner tube 21 and enter into inside the human body, can enough realize the processing of fixed point, and the single implantation both can realize the implantation operation of multiple difference, reduces the number of times of implanting, conveniently operates, reduces the degree of difficulty of operation, shortens the time of operation.

Wherein, the connecting end 23 is located at the farthest end of the whole self-expanding stent system, the far end of the connecting end 23 is provided with a guiding conical surface 231, and the guiding conical surface 231 means that the outer edge of the connecting section is provided with an inclined guiding surface, so that the connecting section can be inserted into the human body more conveniently.

The connecting end 23 can also be fixedly connected with the far end of the first outer tube 41, and the connecting end 23 is used for realizing connection between the first outer tube 41 and the inner tube 21, so that linkage can be realized between the first outer tube 41 and the inner tube 21, the movement of the inner tube 21 can be controlled through the control handle 1, and then the movement of the first outer tube 41 is driven, and the release of the first support 5 is realized.

Further, refer to fig. 2, as a specific implementation of the self-expanding support system provided by the present invention, the dividing head 3 is sleeved on the outside of the middle-layer pipe 22, and the dividing head 3 is fixedly connected to the middle-layer pipe 22, the middle-layer pipe 22 is divided into two independent release regions by the dividing head 3, the two sides of the dividing head 3 are respectively provided with the first support 5 and the second support 6 with the same specification or different specifications, and the first support 5 and the second support 6 are sleeved on the outside of the middle-layer pipe 22.

Dividing head 3's both sides still all to be provided with first hanging head spare 7 and second hanging head spare 8, first hanging head spare 7 and second hanging head spare 8 all are the outside of direct fixed cover locating middle-layer pipe 22, just first support 5's tip is hung and is located on first hanging head spare 7, first hanging head spare 7 with first support 5 one-to-one, just first hanging head spare 7 is located the distal end of first support 5 for first support 5 can release when first outer tube 41 moves towards the distal end.

The end of the second bracket 6 is hung on the second hanging head piece 8, the second hanging head piece 8 is in one-to-one correspondence with the second bracket 6, and the second hanging head piece 8 is located at the proximal end of the second bracket 6, so that the second bracket 6 can be released when the second outer tube 42 moves towards the proximal end.

The first hanging head piece 7 is generally provided with a convex part in a protruding mode, a circular hole is formed in the end part of the first support 5, the circular hole can be buckled on the outer side of the convex part, fixing is achieved through the matching of the convex part and the circular hole, the convex part and the circular hole can be separated when the first support 5 expands, and namely the first support 5 can be kept in a corresponding position; the protruding bellying that is equipped with on the second hitching member 8 also, and the tip of second support 6 is formed with the circular port, and this circular port can lock in the outside of bellying, realizes fixedly through the cooperation of bellying and circular port, and both can realize the separation of bellying and circular port when second support 6 inflation, and second support 6 can keep somewhere in the position that corresponds promptly. According to actual conditions and specific requirements, in the utility model discloses an in other embodiments, can also adopt the mode of other buckles to realize fixed connection between first support 5 and the first overhead of hanging and between second support 6 and the second overhead of hanging, do not do the only limit here.

Preferably, referring to fig. 3, the first stent 5 and the second stent 6 each have a plurality of folding units (not shown) having a shape memory function, and each folding unit can be compressed when the first stent 5 or the second stent 6 is compressed into the outer tube assembly 4 and then expanded by an elastic restoring force after being extended out of the outer tube assembly 4. Wherein, the quantity of folding unit is a plurality of, and a plurality of folding units fixed connection in proper order can splice for the annular, and annular folding unit encloses and closes in the outside of inner tube subassembly 2.

Wherein the folding units can be divided into at least two rows so as to widen the width of the entire first bracket 5 or the second bracket 6, and the folding units between the adjacent two rows can be partially fixedly connected without being partially directly connected.

Preferably, the folding unit comprises four connecting rods (not marked in the figure), the four connecting rods are enclosed into a rhombus, the rhombus can be compressed and expanded conveniently, a filling hollow structure with a larger aperture can be formed, and metal materials are saved. And the corners of the connecting rods of the adjacent folding units are fixedly connected, so that the connection stability between the adjacent folding units can be ensured, the inner diameter of the whole first stent 5 or the whole second stent 6 can be expanded through expansion, and the inner diameter of the whole first stent or the whole second stent is abutted against the inner wall surface of a blood vessel. Of course, according to the actual situation and the specific requirement, in other embodiments of the present invention, the folding units may also be four or more than four connecting rods that are combined into a parallelogram or a hexagon, etc., which is not limited herein.

Further, please refer to fig. 2, as a specific embodiment of the self-expanding stent system provided by the present invention, the outer tube assembly 4 is sleeved on the outer side of the inner tube assembly 2, so as to protect the inner tube assembly 2, the outer tube assembly 4 comprises a first outer tube 41 sleeved on the outer side of the first stent 5 and a second outer tube 42 sleeved on the outer side of the second stent 6, so as to prevent the self-expanding property of the first stent 5 and the second stent 6. One end of the first outer tube 41 is fixedly connected with the inner tube 21, the other end of the first outer tube 41 is sleeved on the dividing head 3, and the first outer tube 41 can be driven by the inner tube 21 to move towards the far end, so that the first outer tube 41 is separated from the dividing head 3, and the first support 5 can be expanded out from between the first outer tube 41 and the dividing head 3.

Preferably, the connecting end 23 is fixedly connected with the inner tube 21 and the first outer tube 41, that is, when the control handle 1 controls the movement of the inner tube 21, the inner tube 21 drives the connecting end 23 to move, and then the connecting end 23 can drive the first outer tube 41 to move, so that the separation of the first outer tube 41 and the dividing head 3 can be realized. It is also possible to directly fixedly connect the distal ends of the inner tube 21 and the first outer tube 41 without providing the connecting end 23, and this is not limited herein.

Furthermore, one end of the second outer tube 42 is sleeved on the dividing head 3, and the other end is connected with the control handle 1. The second outer tube 42 can be moved towards the proximal end directly by the control handle 1, so that the second appearance is separated from the dividing head 3, so that the second stent 6 can be expanded from between the second outer tube 42 and the dividing head 3.

Preferably, the proximal end and the distal end of the dividing head 3 are both provided with step surfaces 31, and the step surfaces 31 can be used for inserting and sleeving the first outer tube 41 and the second outer tube 42, so that the stable connection between the dividing head 3 and the first outer tube 41 and the second outer tube 42 can be ensured, and the first support 5 or the second support 6 is prevented from falling off by mistake.

Preferably, the specifications of the first stent 5 and the second stent 6 can be the same, and at the moment, the self-expanding stents can be placed on two sides simultaneously, so that the operation time can be saved; or the specifications of the first support 5 and the second support 6 are different, and the supports with different specifications can be combined according to the number and the size of pathological changes to treat a plurality of pathological changes, so that the conditions of multiple instruments and multiple implantations are avoided, the operation difficulty of the operation is reduced, the operation time is shortened, and the treatment cost is reduced.

Wherein, the length of the first bracket 5 is 2 to 20mm, and the diameter is 2 to 7 mm; the support length of second support 6 is 2 to 30mm, and the diameter is 5 to 10mm, and two kinds of specifications that first support 5 and second support 6 comparatively conventional adopted in for the operation can be applicable to most service environment. Wherein, the diameter of second support 6 generally needs to be greater than the diameter of outer tube assembly 4 to make outer tube assembly 4 can be light pass through second support 6, avoid producing the influence to the setting position of second support 6.

Preferably, the proximal ends of the first bracket 5 and the second bracket 6, and/or the distal ends of the first bracket 5 and the second bracket 6 are both provided with a developing mark (not shown), and the developing mark can better position the first bracket 5 and the second bracket 6, so that the specific positions of the first bracket 5 and the second bracket 6 can be observed from the outside, and the positioning accuracy of the first bracket 5 and the second bracket 6 is improved. Wherein, both ends at first support 5 and second support 6 all can be provided with the development mark, and the length and the position of locating first support 5 and second support 6 that can be clear can carry out accurate treatment according to the actual need of clinical treatment, and is easy and simple to handle, avoids excessive support treatment.

The developing mark material is one or more of platinum, gold, tantalum and tungsten, the specific position of the developing mark material can be clearly detected through the detection mechanism, and the developing accuracy is higher.

Preferably, one or more development marks may be provided at the middle portion of the first bracket 5 and the second bracket 6 to mark the bending condition of the first bracket 5 and the second bracket 6, which is not limited herein.

Preferably, the outer surfaces of the first stent 5 and the second stent 6 are coated with drug coatings (not shown), the drug coatings include active drugs, and the active drugs are selected from one or more of anti-intimal hyperplasia drugs, anticoagulant drugs, anti-platelet adhesion drugs, anti-infective drugs, antibacterial drugs, anti-inflammatory drugs and antiallergic drugs, that is, the active drugs are generally one or more of paclitaxel, docetaxel, rapamycin and its derivatives, statins, aspirin, warfarin, heparin, low molecular heparin and cilostazol.

The outer surfaces of the first stent 5 and the second stent 6 are coated with the drug coatings, so that the drug coatings can be contacted with and adapted to surrounding tissues after the first stent 5 and the second stent 6 are self-expanded, and the drug coatings can be directly contacted with the surrounding tissues under the driving of the self-expansion of the first stent 5 and the second stent 6 to carry out targeted drug delivery, so that local drugs are concentrated at the positions, the production of neointima in blood vessels is inhibited, and the occurrence probability of restenosis is reduced.

As an alternative embodiment of this embodiment, the control end may also be an electric control end, that is, the inner tube assembly 2 and the outer tube assembly 4 are both directly connected to an electric control end, the electric control end includes a chassis and a control assembly disposed inside the chassis, the control assembly realizes the driving of the first outer tube 41 and the second outer tube 42 by using driving members such as motors, and a control panel is disposed outside the chassis, and the control panel can control the moving positions of the first outer tube 41 and the second outer tube 42, so that the control can be more conveniently and accurately realized, and this is not limited uniquely here.

As an alternative embodiment of this embodiment, the folding unit of the first stent 5 and the second stent 6 may also be a folding unit made of an inflatable balloon or other non-shape memory alloy, which may be a pre-compressed elastic member or an element similar to a torsion spring, and is not limited herein.

As an alternative embodiment of this embodiment, the first support 5 and the second support 6 may be formed by splicing and combining a plurality of rows of folding units, and the length thereof may be adjusted as required, including but not limited to more than 20mm or 30 mm.

As an alternative embodiment of the present embodiment, the specific releasing manner of the first bracket 5 and the second bracket 6 can also be adjusted according to the composition of the inner tube assembly 2 and the outer tube assembly 4, which is not limited herein.

As an alternative embodiment of the present embodiment, the two end portions of the first bracket 5 and the second bracket 6 may not be provided with the development marks, and the first bracket 5 and the second bracket 6 may be directly made of a development material. The outer sides of the first stent 5 and the second stent 6 may not be provided with a drug coating, and the drug coating is not limited herein.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. The control handle is applied to a self-expanding bracket system, the self-expanding bracket system comprises a first bracket (5), a second bracket (6), a first outer pipe (41) coated on the outer side of the first bracket (5) and a second outer pipe (42) coated on the outer side of the second bracket (6), and the self-expanding bracket system is characterized in that: comprises that

A housing (11);

a first driving member (12) for driving the first outer tube (41) to move relative to the first bracket (5), wherein the first driving member (12) is arranged inside the housing (11), and the first driving member (12) comprises a first driving piece (121); and

a second driving member (13) for driving the second outer tube (42) to move relative to the second bracket (6), wherein the second driving member (13) is arranged inside the shell (11), and the second driving member (13) comprises a second driving piece (131).

2. The control handle of claim 1, wherein: the first driving member (12) further comprises a first rack (122) and a first gear (123), the first gear (123) is fixedly connected with the first driving member (121), the first rack (122) is meshed with the first gear (123), and the first rack (122) is connected with the first outer tube (41).

3. The control handle of claim 2, wherein: the inner side of the first outer pipe (41) is provided with a middle-layer pipe (22) and an inner pipe (21), the inner pipe (21) slides in the middle-layer pipe (22), the inner pipe (21) is fixedly connected with the first outer pipe (41) through a connecting end (23), and the first rack (122) is fixedly connected with the inner pipe (21).

4. The control handle of claim 3, wherein: still include fixing base (15), fixing base (15) are fixed middle-layer pipe (22) with the inside wall of casing (11).

5. The control handle according to any one of claims 1 to 4, wherein: the second driving member (13) further comprises a second rack (132) and a second gear (133), the second gear (133) is fixedly connected with the second driving member (131), the second rack (132) is meshed with the second gear (133), and the second rack (132) is connected with the second outer tube (42).

6. The control handle according to any one of claims 1 to 4, wherein: the end part of the shell (11) is provided with a protective pipe (14), and the second outer pipe (42) is arranged in the protective pipe (14) and is in sliding connection with the protective pipe (14).

7. The control handle according to any one of claims 1 to 4, wherein: the first driver (121) is located at a proximal end of the second driver (131).

8. The control handle according to any one of claims 1 to 4, wherein: the first driving piece (121) and the second driving piece (131) both adopt thumb wheels, and one ends of the thumb wheels protrude out of the shell (11).

9. A self-expanding stent system, comprising:

control handle (1) according to any of claims 1 to 8;

a bracket assembly comprising a first bracket (5) and a second bracket (6); and

the outer tube assembly (4) comprises a first outer tube (41) sleeved on the outer side of the first support (5) and a second outer tube (42) sleeved on the outer side of the second support (6), the first outer tube (41) is connected with the first driving member (12), and the second outer tube (42) is connected with the second driving member (13).

10. The self-expanding stent system of claim 9, wherein: still include inner tube (21) subassembly (2), inner tube (21) subassembly (2) include inner tube (21) and cover locate the intermediate level pipe (22) in inner tube (21) outside, inner tube (21) with first drive component (12) are connected and are in intermediate level pipe (22) slide, the one end of first outer tube (41) with inner tube (21) fixed connection.

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