CN211535012U

CN211535012U - Conveying and releasing system for covered stent

Info

Publication number: CN211535012U
Application number: CN201921079414.2U
Authority: CN
Inventors: 陶凉; 王有然; 李菲
Original assignee: Wuhan Maidi Lingke Medical Technology Co ltd
Current assignee: Wuhan Lingke Medical Management Partnership Enterprise (L.P.)
Priority date: 2019-07-11
Filing date: 2019-07-11
Publication date: 2020-09-22
Anticipated expiration: 2029-07-11

Abstract

The utility model relates to a tectorial membrane support is carried and release system, including handle, transport axle, sheath pipe and tear the part, carry the axle to be the bar pole, its one end with the handle is connected fixedly, the other end orientation the outside extension of handle, the other end tip of carrying the axle is equipped with the direction pointed end, sheath pipe detachably cover is located carry the off-axial portion, tectorial membrane support before the art assemble in the sheath pipe to the cover is located carry epaxially, it is used for orientation under the exogenic action to tear the part handle direction pulling the sheath pipe is with the release tectorial membrane support in-process, follows sheath pipe length direction cuts open the sheath pipe. The advantages are that: structural design is simple, reasonable, and convenient operation, flexibility do benefit to the quick release of tectorial membrane support to being applicable to the release of the tectorial membrane support that has artificial blood vessel, avoiding receiving artificial blood vessel's hindrance, having improved traditional tectorial membrane support effectively and tied up when carrying epaxial release with the vascular contact damage vascular situation.

Description

Conveying and releasing system for covered stent

Technical Field

The utility model relates to the technical field of medical equipment, in particular to tectorial membrane support is carried and release system.

Background

For patients with severe aortic vascular diseases or injuries, a surgical thoracotomy operation is generally clinically needed, and an artificial blood vessel and a covered stent are applied to replace the diseased or injured blood vessel. The patent name is artificial blood vessel, has described an artificial blood vessel in the utility model patent of patent No. CN201610639554, can link together artificial blood vessel and human blood vessel fast, shortens the operation time greatly, and the utility model provides an artificial blood vessel front end contains the tectorial membrane support, and artificial blood vessel contains the branch, need carry the tectorial membrane support part in the operation in-process in the blood vessel and release. In the existing vascular surgery and interventional operation, when the vascular stent is delivered to a position and then released, a pull-out type release mode is mostly adopted, the mode can only be used for releasing the covered stent without the artificial blood vessel or the covered stent without the branch artificial blood vessel, and the mode cannot be used for releasing the covered stent with the branch artificial blood vessel as described in patent CN 201610639554; another prior art ligation-type stent graft release method (for example, patent CN200510028616) can release a stent graft with a branch artificial blood vessel and a stent graft without a branch artificial blood vessel, but has a plurality of disadvantages: 1) binding wires are adopted to bind the covered stent, so that the assembly is inconvenient; 2) when the covered stent is conveyed, the covered membrane outside the covered stent is directly contacted with a human blood vessel, the surface of the covered membrane is rough, the friction force between the covered membrane and the human blood vessel is large during conveying, and the blood vessel is easy to be damaged; 3) after the stent is released, the binding wire is clamped between the released covered stent and the blood vessel of the human body, and the blood vessel of the human body is easily damaged when the binding wire is taken out.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a tectorial membrane support is carried and release system is provided, the effectual defect of overcoming prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a tectorial membrane support is carried and release system, including the handle, carry the axle, the sheath pipe and tear the part, the above-mentioned axle of carrying is the bar pole, its one end is connected fixedly with above-mentioned handle, the other end extends towards above-mentioned handle outside, the other end tip of the above-mentioned axle of carrying is equipped with the direction pointed end, the above-mentioned axle outside of carrying is located to above-mentioned sheath pipe detachably cover, tectorial membrane support is in before the art compression assembly in above-mentioned sheath pipe, and the cover is located above-mentioned transport epaxially, the above-mentioned part of tearing is used for pulling above-mentioned sheath pipe in order to release above-mentioned tectorial membrane support in-process towards above-mentioned.

The utility model has the advantages that: structural design is simple, reasonable, convenient operation, flexibility do benefit to the quick release of tectorial membrane support, and application scope is wide, is applicable to the release of tectorial membrane support and take artificial blood vessel tectorial membrane support, and the release of tectorial membrane support does not receive the restriction of rear end artificial blood vessel structural style, and adopts the smooth sheath pipe in surface to restrict tectorial membrane support in the sheath pipe, has improved traditional tectorial membrane support effectively and has tied up when carrying epaxial release with the vascular contact damage vascular situation.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, above-mentioned handle includes the lower cover, upper cover and tail-hood, above-mentioned lower cover and upper cover are the rectangular structure that the level set up, above-mentioned tail-hood is installed in the one end of above-mentioned lower cover, the one end of above-mentioned upper cover articulates on above-mentioned tail-hood, the vertical side cap of installing of its length direction is followed respectively to the both sides of above-mentioned lower cover upper end, above-mentioned upper cover can overturn under the exogenic action and keep away from above-mentioned lower cover, or overturn to and laminate with two above-mentioned side caps, and fix with two above-mentioned side caps through above-mentioned locking part, the one end of above-mentioned transport axle is connected fixedly with above-mentioned tail-hood, the other.

The beneficial effect who adopts above-mentioned further scheme is that handle structural design is reasonable, and is compact, does benefit to the holding of accomodating to tectorial membrane support blood vessel branch after the upper cover is opened.

Further, the locking component comprises two clamping parts and two clamping hook parts which are in one-to-one correspondence, the two clamping parts are respectively arranged at the end parts of the other ends of the two side covers, which are far away from the lower cover, the two clamping hook parts are respectively arranged at the two sides, which are close to the lower cover, of the other end of the upper cover, the two side covers are elastic covers which can be extruded and deformed along the two sides, the upper cover can be overturned to be attached to the two side covers under the action of external force, meanwhile, the two clamping hook parts respectively slide along the corresponding clamping parts and are clamped and fixed with the corresponding clamping parts, when the two side covers are simultaneously extruded inwards or outwards by the external force, the clamping parts are disengaged from the corresponding clamping hook parts, and the upper cover can freely overturn under the action of the external force.

The locking part has the advantages of being reasonable in design, simple to operate and capable of achieving opening and closing operations of the upper cover rapidly.

Furthermore, the other ends of the lower cover and the upper cover are respectively provided with arc-shaped extending parts which are relatively close to each other, one ends of the two extending parts, which are far away from the lower cover and the upper cover, are respectively provided with positioning parts with sector-shaped longitudinal sections, the area between the two extending parts forms a space for accommodating the artificial blood vessel part of the covered stent, when the upper cover rotates to be attached to the two side covers, the two positioning parts are mutually attached, and a circular tubular structure which is used for extending into the interior of the sheath tube to position and guide the sheath tube is formed.

Adopt the beneficial effect of above-mentioned further scheme to be favorable to the branched good storage of blood vessel to keep to be convenient for sheath pipe smooth pull-out.

Further, the tearing component comprises two limiting cover plates and two tearing structures, the two limiting cover plates are fixed on the two extending parts respectively and extend to the outer sides of the two positioning parts, and the tearing structures are fixed between each positioning part and the limiting cover plate corresponding to the outer side of the positioning part.

The beneficial effects of adopting above-mentioned further scheme are that the design is simple, reasonable, can effectually realize cutting open of sheath pipe pulling in-process to make covered stent release that can be smooth, and can not be hindered by covered stent's artificial blood vessel branch when the sheath pipe is pulled out.

Further, the handle is of a hollow tubular structure with one open end, and one end of the conveying shaft extends into the conveying shaft from the open end of the handle and extends to be fixedly connected with the closed end of the handle.

The handle has the advantages of simple structure and convenient use.

Further, the handle also comprises two arc-shaped extending parts with the same ends relatively close to each other, the two extending parts are arranged at the open end of the handle in parallel and at intervals, and the ends of the two extending parts relatively close to each other are deviated from the handle, wherein the other end of one of the extension parts is fixedly connected with the open end of the handle, the other end of the other extension part is rotatably connected with the open end of the handle through a torsion spring, one ends of the two extension parts, which are far away from the handle, are respectively provided with positioning parts with sector ring-shaped longitudinal sections, and the area between the two extension parts forms a space for accommodating the artificial blood vessel part of the covered stent, the other extension part can rotate to be close to one extension part under the action of external force, and the two positioning parts are mutually attached to form a round tubular structure which is used for extending into the sheath tube to position and guide the sheath tube.

The beneficial effect of adopting above-mentioned further scheme is that this design is favorable to the good accomodating of blood vessel branch and is kept.

Furthermore, the position of the open end of the handle corresponding to the other extension part penetrates through the handle and is provided with an elastic press switch, a lock plate connected with the press switch is arranged inside the handle, the other end of the other extension part is connected with a clamping groove structure matched with the lock plate, the other extension part can be overturned under the action of external force until the two positioning parts are mutually attached, the torsion spring deforms, the clamping groove structure is mutually clamped with the lock plate, when the press switch is pressed by the external force, the lock plate is separated from the clamping groove structure to enable the lock plate to be unlocked, the torsion spring restores to the initial state, and the other extension part is overturned to be far away from one extension part.

Adopt above-mentioned further scheme's beneficial effect be easy operation, convenient, the branched holding of blood vessel of being convenient for is placed and the spacing after placing keeps.

The pull ring is detachably mounted at the end part of the closed end of the handle and is used for being connected with one end, far away from the tip, of the sheath tube and driving the sheath tube under the action of external force.

The beneficial effect who adopts above-mentioned further scheme is that this design does benefit to the pulling of sheath pipe to realize the good release of covered stent.

Drawings

FIG. 1 is a schematic diagram of a product configuration of a stent graft delivery and release system of the present invention;

FIG. 2 is a schematic view of a product configuration of the stent graft delivery and release system of the present invention in operation to open the cover;

FIG. 3 is a cross-sectional view of one product configuration of the stent graft delivery and release system of the present invention;

FIG. 4 is an enlarged view of the structure of portion A in FIG. 3;

FIG. 5 is a side view of the product structure of FIG. 3;

FIG. 6 is a schematic view of another product configuration of the stent graft delivery and release system of the present invention;

FIG. 7 is a schematic view of a product configuration of a stent graft delivery and release system of the present invention in operation with an extension portion open;

FIG. 8 is a cross-sectional view of one product configuration of the stent graft delivery and release system of the present invention;

FIG. 9 is a schematic view of the covered stent delivery and delivery system of the present invention before the sheath is torn.

In the drawings, the components represented by the respective reference numerals are listed below:

1. handle, 2, conveying axle, 4, location portion, 5, pull ring, 11, lower cover, 12, upper cover, 13, tail-hood, 14, side cap, 15, extension, 16, push switch, 21, leading pointed end, 41, spacing apron, 42, tear structure, 121, trip portion, 141, block portion, 151, draw-in groove structure, 161, locking board.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Example (b): as shown in fig. 1 to 9, the stent graft delivery and release system of the present embodiment includes a handle 1, a delivery shaft 2, a sheath tube and a tearing member, wherein the delivery shaft 2 is a bar-shaped rod, one end of the delivery shaft 2 is fixedly connected to the handle 1, the other end of the delivery shaft extends toward the outside of the handle 1, a guide tip 21 is disposed at the end of the other end of the delivery shaft 2, the sheath tube is detachably sleeved outside the delivery shaft 2, the stent graft is compression-assembled in the sheath tube before operation and sleeved on the delivery shaft 2, and the tearing member is configured to split the sheath tube along the length direction of the sheath tube during pulling the sheath tube toward the handle 1 direction under an external force to release the stent graft.

Before operation, the covered stent is placed inside a sheath (not shown in the figure) (generally, the covered stent is already filled in the sheath before the sheath leaves the factory, and the artificial blood vessel is exposed out of one end of the sheath), and the sheath is sleeved outside the delivery shaft 2 (wherein, the covered stent can be sleeved on the delivery shaft 2 or not sleeved on the delivery shaft 2), so that the covered stent is close to the tip 21 and is positioned and maintained by the tip 21, then, the delivery shaft 2 and the sheath are extended into the blood vessel along the incision of the blood vessel and are delivered to a patient needing to be operated and filled in the covered stent, next, an external force pulls the sheath outwards, and simultaneously cuts open the sheath by the tearing part, the sheath is divided into two or cut open along with pulling the sheath, after the sheath is pulled out, the covered stent can be released at the patient, and finally, the delivery shaft 2 is taken out, namely, the incision of the blood vessel is sutured. The following are specifically mentioned: the covered stent is always positioned in the sheath before release in the whole operation and cannot be contacted with the blood vessel, the sheath is made of materials with good biocompatibility and small friction coefficient such as PTFE (polytetrafluoroethylene), the surface of the sheath contacted with the blood vessel is smooth, the friction coefficient is small, and the blood vessel cannot be damaged; and if the tail end of the covered stent is provided with the artificial blood vessel, the artificial blood vessel part is positioned outside the cut end face of the patient blood vessel, the main body part of the covered stent enters the blood vessel to be released, and the top point of the area of the sheath tube in front of the connection part of the artificial blood vessel of the main body of the covered stent is cut open, so that the obstruction of the branch of the artificial blood vessel and the like to the pulling of the sheath tube can be avoided, and the condition that the traditional covered stent is contacted with the blood vessel to damage the blood vessel when being bound.

Specifically, the structural configuration of the whole system at least comprises the following two forms:

1) first form (as shown in figures 1 to 5):

preferably, the handle 1 includes a lower cover 11, an upper cover 12 and a tail cover 13, the lower cover 11 and the upper cover 12 are both horizontally arranged long strip structures, the tail cover 13 is installed at one end of the lower cover 11, one end of the upper cover 12 is hinged on the tail cover 13, side covers 14 are respectively installed vertically along the length direction of the upper end of the lower cover 11 on both sides, the upper cover 12 can be turned over to be away from the lower cover 11 under the action of an external force or turned over to be attached to the two side covers 14 and fixed to the two side covers 14 through the locking component, one end of the conveying shaft 2 is connected and fixed to the tail cover 13, and the other end of the conveying shaft penetrates through one end of the handle 1 away from the tail cover 13.

During operation, the upper cover 12 is opened firstly, the main body part of the covered stent with the artificial blood vessel is arranged in the sheath, the sheath is sleeved outside the conveying shaft 2, the artificial blood vessel part is arranged between the lower cover 11 and the upper cover 12, on the next step, the conveying shaft 2 is communicated with the sheath to be sent to a specified position in the blood vessel of the patient (the artificial blood vessel is ensured to be effectively butted with the incision or the end face of the blood vessel of the patient), on the next step, the sheath is pulled outwards, and the sheath is cut open at a fixed point by a tearing part in the area between the artificial blood vessel and the tip 21.

As a preferred embodiment, two of the side covers 14 are respectively provided with a notch for the sheath to pass through, and one end of the sheath can pass through the notch of any one of the side covers 14 and straighten the outside of the handle 1, so that the sheath can be conveniently applied with external force and pulled outwards in the operation process to release the covered stent, and the design is reasonable and beneficial to operation.

Of course, a pulling part for connecting with the sheath tube is slidably installed in the area between the upper cover 12 and the lower cover 11 along the length direction of the upper cover and the lower cover, and the sheath tube is pulled outwards by applying external force to release the covered stent.

In a preferred embodiment, the locking member includes two engaging portions 141 and two hooks 121, the two engaging portions 141 are respectively disposed at one end of the other end of the two side covers 14 away from the lower cover 11, the two hooks 121 are respectively disposed at two sides of the other end of the upper cover 12 close to the lower cover 11, the two side covers 14 are both elastic covers capable of being deformed by pressing along two sides, the upper cover 12 can be turned over to be attached to the two side covers 14 by an external force, at the same time, the two hooks 121 respectively slide along the corresponding engaging portions 141 and are engaged and fixed with the corresponding engaging portions 141, when the two side covers 14 are pressed inward or outward by an external force, the engaging portions 141 are disengaged from the corresponding hooks 121, and the upper cover 12 can be turned over freely by an external force, when the cover is opened, the two side covers 14 are simultaneously pressed inwards or outwards, so that the two clamping hook portions 121 and the corresponding clamping portions 141 are separated from each other (the clamping relationship is removed), and the turner dog enables the upper cover 12 to be freely turned over.

The one end of above-mentioned upper cover 12 can be articulated with tailcap 13 through the torsional spring, and the torsional spring is in the diastole state after uncapping, and when closing the lid, the torsional spring produces deformation, and this design makes trip portion 121 break away from the back each other with the block portion 141 that corresponds, and upper cover 12 can be opened under the torsional spring elastic force effect is automatic, and of course, also can make the two cooperation inseparabler when closing the lid.

In a preferred embodiment, the other ends of the lower cover 11 and the upper cover 12 are respectively provided with arc-shaped extending portions 15 which are relatively close to each other, one ends of the two extending portions 15 which are far away from the lower cover 11 and the upper cover 12 are respectively provided with positioning portions 4 with sector ring-shaped longitudinal sections, the area between the two extending portions 15 forms a space for accommodating the artificial blood vessel part of the stent graft, when the upper cover 12 is rotated to be engaged with the two side covers 14, the two positioning portions 4 are engaged with each other, and a round tubular structure which is used for extending into the sheath tube to position and guide the sheath tube is formed, the artificial blood vessel part of the covered stent can be accommodated between the two extension parts 15, the positioning part 4 is positioned at the tail ends of the extension parts 15, the design is very reasonable, the sheath tube can be well guided at the positioning part, and subsequent pulling and tearing (splitting) operations are facilitated.

As a preferred embodiment, the tearing component comprises two limiting cover plates 41 and two tearing structures 42, the two limiting cover plates 41 are respectively fixed on the two extending parts 15 and respectively extend to the outer sides of the two opposite positioning parts 4, the tearing structure 42 is fixed between each positioning part 4 and the limiting cover plate 41 corresponding to the outer side of the positioning part, the design is simple and reasonable, the sheath tube can be slid into two parts by the tearing structure 42 while being pulled outwards at the positioning part 4, and the obstruction of the artificial blood vessel branch of the covered stent to the pulling of the sheath tube is effectively avoided.

2) Second form (as shown in fig. 6 to 8):

preferably, above-mentioned handle 1 is hollow and the open tubular structure of one end, and the one end of above-mentioned transport axle 2 stretches into by the open end of above-mentioned handle 1 to extend to and be connected fixedly with the blind end of above-mentioned handle 1, the both sides of above-mentioned handle 1 are equipped with the breach that supplies above-mentioned sheath pipe to pass respectively, reasonable in design, simple structure, compactness do benefit to the arrangement of transport axle 2.

As a preferred embodiment, the handle 1 further includes two arc-shaped extending portions 15 with the same ends relatively close to each other, the two extending portions 15 are arranged at the open end of the handle 1 in parallel and at intervals, and the ends of the two extending portions 15 relatively close to each other are away from the handle 1, wherein the other end of one of the extending portions 15 is fixedly connected with the open end of the handle 1, the other end of the other extending portion 15 is rotatably connected with the open end of the handle 1 through a torsion spring, one end of each of the two extending portions 15, which is far away from the handle 1, is respectively provided with a positioning portion 4 with a sector-ring-shaped longitudinal section, a space for accommodating an artificial blood vessel portion of a stent graft is formed between the two extending portions 15, the other extending portion 15 can rotate to approach one of the extending portions 15 under the action of an external force, and the two positioning portions 4 are mutually attached and form a circular tubular structure for extending into the sheath tube to position and guide the, the artificial blood vessel part of the covered stent can be accommodated between the two extending parts 15, and the positioning part 4 is positioned at the tail end of the extending part 15, so that the design is very reasonable, the sheath tube can be well guided at the positioning part, and the subsequent pulling and tearing (splitting) operation is facilitated.

In a preferred embodiment, an elastic push switch 16 is installed at a position corresponding to the other extension portion 15 at the open end of the handle 1, a lock plate 161 connected to the push switch 16 is installed inside the handle 1, a catch structure 151 matched with the lock plate 161 is connected to the other end of the other extension portion 15, the other extension portion 15 can be turned over under an external force until the two positioning portions 4 are attached to each other, the torsion spring is deformed, the catch structure 151 and the lock plate 161 are engaged with each other, when the push switch 16 is pressed by the external force, the catch structure 161 is disengaged from the catch structure 151 to unlock the two, the torsion spring returns to an initial state, and the other extension portion 15 is forced to turn over and be away from one of the extension portions 15, and when the elastic push switch 16 is pressed during a surgery, the catch structure 151 and the catch plate 161 are disengaged from each other, and the clamping relationship is released, so that the other extension part 15 can be freely turned over, when clamping and keeping are needed, only the other extension part 15 needs to be turned over until the positioning part 4 of the other extension part 15 is mutually attached to the positioning part 4 of one extension part 15, and the locking plate 161 is clamped with the clamping groove structure 151, so that the design is simple, and the operation is quicker and more convenient. The following are specifically mentioned: the detailed cooperation of draw-in groove structure 151 level locking plate 161 sees the figure (see fig. 8), and wherein the one end that locking plate 161 and draw-in groove structure 151 mutually supported allows to extrude under the exogenic action and takes place deformation to possess the function of self-resuming deformation, thereby make locking plate 161 and draw-in groove structure 151 can effectually carry out unblock or block operation.

In a preferred embodiment, the stent graft further comprises a pull ring 5, wherein the pull ring 5 is detachably mounted at the closed end of the handle 1, and is used for connecting with one end of the sheath far away from the tip 21 and pulling the sheath under the action of external force.

It should be noted that: the sheath tube is a common tearable sheath tube, a common sheath tube or a common plastic tube in the market, and the tearing structure 42 may be a blade or any structure with a sharp feature, so as to ensure that the sheath tube can be torn when the sheath tube is pulled.

The stent graft delivery and release system of this embodiment aims at that the stent graft is placed in the sheath pipe before the art (the stent graft is filled into the sheath pipe before the sheath pipe leaves the factory), releases in the disease department in the art, in order to avoid the stent graft to contact with the blood vessel in the release process, in order to reduce the damage to the blood vessel, and, the sheath pipe takes out very easily in the release process, and because the sheath pipe takes out through the mode of cutting open, the branch of the artificial blood vessel of the stent graft can not cause the hindrance to taking out of the sheath pipe, the operation process is simpler, and the operation is smoother.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A covered stent conveying and releasing system is characterized in that: including handle (1), carry axle (2), sheath pipe and tear the part, carry axle (2) to be the bar pole, its one end with handle (1) is connected fixedly, the other end orientation handle (1) outside extension, the other end tip of carrying axle (2) is equipped with direction pointed end (21), sheath pipe detachably cover is located carry axle (2) outside, the tectorial membrane support before the art compression assemble in the sheath pipe to the cover is located carry on axle (2), it is used for orientation under the exogenic action to tear the part handle (1) direction pulling the sheath pipe is in order to release tectorial membrane support in-process follows sheath pipe length direction cuts open the sheath pipe.

2. The stent graft delivery and release system of claim 1, wherein: handle (1) includes lower cover (11), upper cover (12) and tail-hood (13), lower cover (11) and upper cover (12) are the long structure that the level set up, tail-hood (13) install in the one end of lower cover (11), the one end of upper cover (12) articulates on tail-hood (13), side cap (14) are vertically installed along its length direction respectively to both sides of lower cover (11) upper end, upper cover (12) can overturn under the exogenic action and keep away from lower cover (11), or overturn to with two side cap (14) laminating, and through locking part and two side cap (14) are fixed, carry the one end of axle (2) with tail-hood (13) are connected fixedly, the other end by handle (1) is kept away from the one end of tail-hood (13) is worn out.

3. The stent graft delivery and release system of claim 2, wherein: the locking component comprises two clamping parts (141) and two clamping hook parts (121) which are in one-to-one correspondence, the two clamping parts (141) are respectively arranged at one end part of the other end of each of the two side covers (14), which is far away from the lower cover (11), the two clamping hook parts (121) are respectively arranged at two sides, which are close to the lower cover (11), of the other end part of the upper cover (12), the two side covers (14) are elastic covers which can be extruded and deformed along two sides of the side covers, the upper cover (12) can be turned over to be attached to the two side covers (14) under the action of external force, meanwhile, the two clamping hook parts (121) respectively slide along the corresponding clamping parts (141) and are clamped and fixed with the corresponding clamping parts (141), and when the external force simultaneously extrudes the two side covers (14) inwards or outwards, the clamping parts (141) are disengaged from the corresponding clamping hook parts (121), the upper cover (12) can be freely turned over under the action of external force.

4. The stent graft delivery and release system of claim 2, wherein: the other end of lower cover (11) and upper cover (12) is equipped with curved extension (15) that draw close relatively respectively, two extension (15) are kept away from the one end of lower cover (11) and upper cover (12) is equipped with longitudinal section for fan annular location portion (4) respectively, two regional constitution between extension (15) is used for holding the space at tectorial membrane support's artificial blood vessel position, works as upper cover (12) rotate to with two when side cap (14) laminating, two location portion (4) laminate each other to constitute one and be used for stretching into the inside pipe column structure to its location and direction of sheath pipe.

5. The stent graft delivery and release system of claim 4, wherein: the tearing component comprises two limiting cover plates (41) and two tearing structures (42), the two limiting cover plates (41) are fixed on the two extending parts (15) respectively and extend to the two opposite outer sides of the positioning parts (4), and the tearing structures (42) are fixed between the positioning parts (4) and the limiting cover plates (41) corresponding to the outer sides of the positioning parts.

6. The stent graft delivery and release system of claim 1, wherein: the handle (1) is a hollow tubular structure with one open end, and one end of the conveying shaft (2) extends into the hollow tubular structure from the open end of the handle (1) and extends to the closed end of the handle (1) to be fixedly connected.

7. The stent graft delivery and release system of claim 6, wherein: the handle (1) further comprises two arc-shaped extension parts (15) with the same ends relatively close, the two extension parts (15) are arranged at the open end of the handle (1) in parallel and at intervals, one end of the extension parts (15) relatively close to the open end of the handle (1) deviates from the handle (1), one end of the extension part (15) is fixedly connected with the open end of the handle (1), the other end of the extension part (15) is connected with the open end of the handle (1) in a rotating mode through a torsion spring, one end, far away from the handle (1), of the extension part (15) is provided with a positioning part (4) with a sector ring-shaped longitudinal section, the two areas between the extension parts (15) form a space for accommodating an artificial blood vessel part of a covered stent, and the other extension part (15) can rotate under the external force effect to be close to one of the extension parts (, and the two positioning parts (4) are mutually attached to form a round tubular structure which is used for extending into the sheath tube to position and guide the sheath tube.

8. The stent graft delivery and release system of claim 7, wherein: an elastic press switch (16) is arranged at the position of the open end of the handle (1) corresponding to the other extension part (15) in a penetrating way, a locking plate (161) connected with the push switch (16) is arranged in the handle (1), the other end of the other extension part (15) is connected with a clamping groove structure (151) matched with the locking plate (161), the other extension part (15) can be turned over under the action of external force until the two positioning parts (4) are mutually attached, the torsion spring generates deformation, and the slot structure (151) and the locking plate (161) are mutually clamped, when the push switch (16) is pressed by external force, the locking plate (161) is separated from the clamping groove structure (151) to unlock the two, the torsion spring restores to the initial state, and driving the other of said extensions (15) to flip away from one of said extensions (15).

9. The stent graft delivery and release system of claim 7, wherein: the tearing component comprises two limiting cover plates (41) and two tearing structures (42), the two limiting cover plates (41) are fixed on the two extending parts (15) respectively and extend to the two opposite outer sides of the positioning parts (4), and the tearing structures (42) are fixed between the positioning parts (4) and the limiting cover plates (41) corresponding to the outer sides of the positioning parts.

10. The stent graft delivery and release system of any one of claims 6 to 9, wherein: still include pull ring (5), pull ring (5) detachably install in the blind end tip of handle (1), be used for with the sheath pipe is kept away from the one end of pointed end (21) is connected to pull the sheath pipe under the exogenic action.