CN111743670B - Post-release device for stent graft and stent graft implantation system - Google Patents
Post-release device for stent graft and stent graft implantation system Download PDFInfo
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- CN111743670B CN111743670B CN202010764931.4A CN202010764931A CN111743670B CN 111743670 B CN111743670 B CN 111743670B CN 202010764931 A CN202010764931 A CN 202010764931A CN 111743670 B CN111743670 B CN 111743670B
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- stent graft
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- seat
- release device
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/954—Instruments specially adapted for placement or removal of stents or stent-grafts for placing stents or stent-grafts in a bifurcation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2002/9505—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
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- Prostheses (AREA)
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Abstract
The invention provides a release device after a covered stent and an implantation system of the covered stent, which relate to the technical field of medical equipment and comprise a guide seat, a pull wire seat, a locking structure and a first pull wire and a plurality of second pull wires, wherein the first pull wire is coiled on the outer peripheral surface or the inner peripheral surface of the guide seat, one end of the first pull wire is fixedly connected with the pull wire seat, the other end of the locking structure is fixedly connected with the guide seat, one ends of the second pull wires are fixedly connected with the guide seat, the free ends of the second pull wires are all fixed between the first pull wire and the guide seat, and the first pull wire can be separated from the guide seat under the condition that the pull wire seat moves in the direction away from the guide seat, so that the free ends of the second pull wires are released. The invention relieves the technical problems that the prior release device after the covered stent is extremely easy to scratch the blood vessel, cause the damage and even rupture of the blood vessel, and when the proximal end of the covered stent is released, the proximal end part of the covered stent is simultaneously released and sprung outwards, so that the blood vessel is greatly damaged, thereby causing high operation difficulty and low operation success rate.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a release device after a covered stent and a covered stent implantation system.
Background
The aortic diseases comprise aortic dissection, aortic aneurysm and the like, are mainly caused by hypertension, arteriosclerosis, injury, infection and the like, are cardiovascular diseases seriously threatening human health, and are extremely life threatening for patients, the traditional operation mode adopted for treating the aortic diseases is to introduce extracorporeal circulation to perform open operation, and perform artificial vascular replacement on the injured part, but the open operation time is long, the operation wound is large, the death rate is extremely high, and in recent years, the patients are treated by adopting a minimally invasive intervention mode, namely, a tectorial stent is released to the lesion position of the blood vessel of the patients through a special conveying system, so that the aortic dissection and the aortic aneurysm blood vessel are repaired, the lesion blood vessel is protected, and the lesion blood vessel is prevented from being broken and death.
The whole tectorial membrane bracket is cylindrical and consists of a metal framework and an externally covered thin artificial blood vessel, wherein the metal framework is mostly made of memory alloy, the thin artificial blood vessel is mostly made of terylene or polytetrafluoroethylene, the tectorial membrane bracket is required to be put into an outer tube of a conveying system before operation, and the conveying system conveys the loaded tectorial membrane bracket to a lesion position of a patient blood vessel and releases the loaded tectorial membrane bracket so as to achieve the aim of treatment; the delivery system for delivering a stent graft to a vascular lesion site of a patient generally comprises a delivery device and a guide wire, wherein the delivery device comprises an operation handle, an outer tube, an inner tube, a guide wire tube and a stent graft rear release device, the guide wire tube passes through the inner tube, the inner tube passes through the outer tube, the outer tube and the inner tube are both connected to the operation handle, the stent graft rear release device is connected to the proximal end of the inner tube, when the stent graft is delivered to the human body, the stent graft is installed in the proximal end of the delivery device, specifically, the whole stent graft is compressed in the outer tube, the rear fixer fixes the rear end of the stent graft from the inside the outer tube, the proximal end of the stent graft is fixed to the stent graft rear release device, the stent graft rear release device is bound to the proximal end of the stent graft to enable the proximal end of the stent graft to be in a folded state, the guide wire passes through the guide wire tube, the stent graft rear release device loaded with the stent graft is delivered to the vascular lesion site of the patient by percutaneous puncture of the guide wire along the guide wire, the delivery device is withdrawn from the proximal end of the outer tube by the operation handle, the outer tube is withdrawn by the operation handle to enable the distal end of the stent graft to be released from the stent graft, the stent graft is completely by the outer tube is withdrawn from the outer tube, the stent graft is released by the operation handle is completely, and the stent is released by the proximal end of the stent graft is retracted from the stent graft is retracted from the stent into the vascular site, the whole of the conveyor and the guide wire are withdrawn back.
In the prior art, the structure of the proximal end of the constrained covered stent of the used covered stent rear release device is mostly a hard metal wire or a rigid metal fork-shaped structure, when the covered stent is completely released, the edges and corners of the rigid structure of the proximal end of the constrained covered stent of the covered stent rear release device are extremely easy to scratch and scratch blood vessels in narrow and bent blood vessel channels, cause vascular injury and even rupture, cause fatal injury to patients, and in addition, in the prior art, when the proximal end of the covered stent is released by the covered stent rear release device, the proximal end of the covered stent is simultaneously released outwards, and the release process also causes great injury to the blood vessels, thereby causing the problems of high operation difficulty and low operation success rate.
Disclosure of Invention
The invention aims to provide a release device after a covered stent and an implantation system of the covered stent, which are used for relieving the technical problems that the release device after the covered stent is easy to scratch blood vessels in a narrow and bent blood vessel channel, causes vascular injury and even rupture, is slightly careless and causes fatal injury to patients, and when the proximal end of the covered stent is released by the release device after the covered stent, the proximal end part of the covered stent is simultaneously outwards sprung open, and the release process can cause great injury to the blood vessels, thereby causing high operation difficulty and low operation success rate.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a post-stent-graft release device, including a guide holder, a wire holder, a first wire, a second wire, and a locking structure;
The first pull wire and the second pull wire are both made of flexible materials;
taking the direction extending from the proximal end of the guide seat to the distal end of the guide seat as the axial direction of the guide seat, taking the direction extending from the proximal end of the wire drawing seat to the distal end of the wire drawing seat as the axial direction of the wire drawing seat, arranging a first mounting through hole penetrating through the guide seat along the axial direction of the guide seat on the guide seat, and arranging a second mounting through hole penetrating through the wire drawing seat along the axial direction of the wire drawing seat on the wire drawing seat;
The first stay wire is coiled on the outer peripheral surface of the guide seat or the inner peripheral surface of the guide seat, one end of the first stay wire is fixedly connected with the stay wire seat, and the other end of the first stay wire is fixed on the guide seat by the locking structure;
the second stay wire is provided with a plurality of second stay wires, one ends of the second stay wires are fixedly connected to the guide seat, the second stay wires are distributed around the radial circumferential surface of the guide seat at intervals in pairs, the other ends of the second stay wires are used as free ends of the second stay wires, the free ends of the second stay wires are fixed between the first stay wires and the guide seat, and under the condition that the stay wire seat moves in the direction away from the guide seat, the first stay wires can be separated from the guide seat, so that the free ends of the second stay wires are released.
With reference to the first aspect, the embodiment of the present invention provides a first possible implementation manner of the first aspect, wherein the locking structure includes a spiral groove disposed on an outer peripheral surface of the guide holder or an inner peripheral surface of the guide holder, and a notch of the spiral groove is configured to be capable of fixing a first wire disposed inside the spiral groove in a pressing manner inside the spiral groove, so that a free end of the second wire is fixed between a groove wall of the spiral groove and the first wire in a pressing manner.
With reference to the first possible implementation manner of the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein the locking structure further includes an elastic tube, the elastic tube is fixed inside the spiral groove, the first pull wire is pressed and fixed inside the elastic tube, or the elastic tube is pressed and fixed inside the spiral groove, and the first pull wire is fixed inside the elastic tube.
With reference to the second possible implementation manner of the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein the elastic tube includes two mutually spaced multiple segments.
With reference to one of the first to three possible embodiments of the first aspect, the embodiment of the present invention provides a fourth possible embodiment of the first aspect, wherein a depth of the spiral groove is greater than a thickness of the first pull wire in a direction perpendicular to a length direction of the first pull wire itself.
With reference to one of the second or three possible embodiments of the first aspect, the present embodiment provides a fifth possible embodiment of the first aspect, wherein a depth of the spiral groove is greater than a diameter of the elastic tube.
With reference to one of the first to three possible implementation manners of the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein a first wire penetrating hole is further provided on the guide seat, one end of the first wire penetrating hole is communicated with a distal end surface of the guide seat, and the other end of the first wire penetrating hole is communicated with a portion, close to the distal end of the guide seat, of the spiral groove.
With reference to the first aspect and any one of the first to three possible implementation manners of the first aspect, the embodiment of the present invention provides a seventh possible implementation manner of the first aspect, wherein the locking structure includes an elastic locking ring configured to enable an end of the first pull wire, which is far away from the pull wire seat, to be fixed to an outer circumferential surface of the guide seat in a pressing manner, or enable an end of the first pull wire, which is far away from the pull wire seat, to be fixed to an inner circumferential surface of the guide seat in a pressing manner.
With reference to the seventh possible implementation manner of the first aspect, the embodiment of the present invention provides an eighth possible implementation manner of the first aspect, wherein a locking ring fixing groove extending along a radial circumferential direction of the guide seat is further provided on an inner circumferential surface of the guide seat or an outer circumferential surface of the guide seat.
With reference to the eighth possible implementation manner of the first aspect, the present embodiment provides a ninth possible implementation manner of the first aspect, wherein a depth of the locking ring fixing groove is greater than a ring body thickness of the elastic locking ring.
With reference to the first aspect, an embodiment of the present invention provides a tenth possible implementation manner of the first aspect, wherein the locking structure includes a first wire fixing groove provided on an outer circumferential surface of the guide seat or an inner circumferential surface of the guide seat;
The first stay wire fixing groove comprises a first fixing groove and a second fixing groove, wherein one end of the first fixing groove is connected with one end of the second fixing groove, and the depth of the second fixing groove is larger than that of the first fixing groove;
the end part of one end of the first pull wire, which is far away from the pull wire seat, is provided with an elastic limit head, the elastic limit head is configured to be compressed to a maximum thickness of the elastic limit head which is smaller than the depth of the first fixed groove, and the maximum thickness of the elastic limit head is larger than the depth of the first fixed groove under the condition that the elastic limit head is not compressed;
The notch of the second fixing groove is configured to limit the elastic limiting head in the second fixing groove.
With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides an eleventh possible implementation manner of the first aspect, wherein a ferrule is disposed at a free end of each of the second pull wires, and the first pull wires sequentially pass through ferrules on the free ends of a plurality of the second pull wires.
With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a twelfth possible implementation manner of the first aspect, wherein a fixing ring is disposed on the wire holder, and one end of the first wire is fixedly connected to the wire holder in a knotting manner after passing through the fixing ring.
With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a thirteenth possible implementation manner of the first aspect, wherein a plurality of bosses are provided on an outer circumferential surface of the guide holder, and the plurality of bosses are configured to be capable of hooking a hanging ring at a proximal end of the stent graft to the guide holder.
With reference to one of the thirteenth possible implementation manners of the first aspect, the embodiment of the present invention provides a fourteenth possible implementation manner of the first aspect, wherein a boss through hole is formed on each boss, and an opposite end of the free end of the second pull wire is fixedly connected in the boss through hole.
With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a fifteenth possible implementation manner of the first aspect, wherein a plurality of second wire limiting grooves are formed on an outer circumferential surface of the guide holder or an inner circumferential surface of the guide holder, the plurality of second wire limiting grooves are in one-to-one correspondence with the plurality of second wires, and one ends of the plurality of second wire limiting grooves extend to a distal end surface of the guide holder.
With reference to the fifteenth possible implementation manner of the first aspect, the embodiment of the present invention provides a sixteenth possible implementation manner of the first aspect, wherein a depth of the second wire limiting groove is greater than a thickness of the second wire in a direction perpendicular to a length extension direction of the second wire.
With reference to the first aspect and one of the first to third and tenth possible implementation manners of the first aspect, an embodiment of the present invention provides a seventeenth possible implementation manner of the first aspect, wherein an outer circumferential surface of a proximal end of the guide holder is a round table side surface with a gradually increasing diameter from the proximal end of the guide holder toward a distal end of the guide holder.
With reference to the first aspect and one of the first to third and tenth possible embodiments thereof, the present embodiment provides an eighteenth possible embodiment of the first aspect, wherein an X-ray developer is connected to the first pull wire and/or the second pull wire.
In a second aspect, an embodiment of the present invention provides a stent graft implantation system, including an operating handle, a guide wire tube, an inner tube, an outer tube, and a stent graft rear release device provided in any one of the foregoing first aspect and any possible implementation manner thereof, where the guide wire tube passes through the inner tube, and the guide wire tube passes through the second mounting through hole, and a proximal end of the guide wire tube is fixed inside the first mounting through hole, and a proximal end of the inner tube is fixed at a distal end of the wire holder, and both the distal end of the outer tube and the distal end of the inner tube are connected to the operating handle, and the operating handle is configured to be capable of driving the outer tube and the inner tube to move back and forth.
The embodiment of the invention can realize the following beneficial effects:
In a first aspect, an embodiment of the present invention provides a post-stent-graft release device, including a guide holder, a wire holder, a first wire, a second wire, and a locking structure.
The first pull wire and the second pull wire are made of flexible materials, the direction extending from the proximal end of the guide seat to the distal end of the guide seat is taken as the axial direction of the guide seat, the direction extending from the proximal end of the pull wire seat to the distal end of the pull wire seat is taken as the axial direction of the pull wire seat, a first installation through hole penetrating through the guide seat along the axial direction of the guide seat is formed in the guide seat, a second installation through hole penetrating through the pull wire seat along the axial direction of the pull wire seat is formed in the pull wire seat, the first pull wire is coiled on the outer peripheral surface of the guide seat or the inner peripheral surface of the guide seat, one end of the first pull wire is fixedly connected with the pull wire seat, the other end of the first pull wire is fixedly connected with the guide seat by the locking structure, the plurality of second pull wires are distributed at intervals in pairs around the radial peripheral surface of the guide seat, the other end of the second pull wire is taken as the free end of the second pull wire, the free end of the second pull wire is fixed between the first pull wire and the guide seat, and the other end of the second pull wire is far away from the guide seat in the direction of the pull wire, and the free end of the second pull wire can be released.
According to the stent graft fixing and releasing device, firstly, the first pull wire and the second pull wire which are made of flexible materials are adopted, edges and corners are not generated during bending, the structure flexibility of the proximal end of the stent graft binding and releasing device can be ensured, scraping damage to blood vessels can be reduced to a great extent during operation, on the basis, operation matters such as, but not limited to, enabling the second pull wire which passes through the position of the hanging ring at the proximal end of the stent graft to be longer, restraining deformation of the stent graft is small when the outer tube is withdrawn to semi-release the stent graft, therefore, when the stent graft is completely released, the force released by the stent graft is not as great, the buffer effect can be achieved, the blood vessels are further protected, even scraping is not caused to the blood vessels, therefore, damage to the blood vessels in the operation process is reduced to a great extent, in the prior art, before the whole and the guide wire are withdrawn, the operation handle of the outer tube is required to be reset, the damage to the blood vessels of the rigid structure of the front end of the stent graft is avoided, the operation efficiency is reduced when the operation is withdrawn, the whole operation efficiency is improved, the whole operation is carried out, the operation efficiency is improved, the operation is convenient to be carried out directly, and the device is convenient to install the device, and the operation is relatively easy to implement, and the operation is convenient to implement. In addition, in this embodiment, when the stent graft is completely released, the stent graft is gradually and slowly released by pulling the first pull wire backward, and the first pull wire is wound around the outer circumferential surface of the guide seat or the inner circumferential surface of the guide seat, that is, in this releasing process, each hanging ring on the stent graft is relatively independent, and the two adjacent hanging rings are sequentially and slowly released, and the impact of each release on the blood vessel is very small, so that the whole releasing process is safer.
In summary, the embodiment of the invention at least relieves the technical problems that the structure of the constrained stent graft proximal end of the stent graft fixing and releasing device in the prior art is mostly a hard metal wire or a rigid metal fork-shaped structure, which is extremely easy to scratch blood vessels in a narrow and bent blood vessel channel, causes vascular injury and even rupture, is slightly careless, and causes fatal injury to patients, and when the stent graft proximal end is released by the existing stent graft rear releasing device, the proximal end part of the stent graft proximal end is simultaneously released outwards to be sprung open, and the release process also causes great injury to the blood vessels, thereby causing high operation difficulty and low operation success rate.
In a second aspect, an embodiment of the present invention provides a stent graft implantation system, including an operating handle, a guide wire tube, an inner tube, an outer tube, and the stent graft rear release device provided in the first aspect, where the guide wire tube passes through the inner tube and the guide wire tube passes through the second mounting through hole, a proximal end of the guide wire tube is fixed inside the first mounting through hole, a proximal end of the inner tube is fixed at a distal end of the wire holder, both the distal end of the outer tube and the distal end of the inner tube are connected to the operating handle, and the operating handle is configured to drive the outer tube and the inner tube to move back and forth.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of a release device after a stent graft according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a part of the structure of the portion A in FIG. 1;
FIG. 3 is an exploded view of the overall structure of a release device after a stent graft according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of the overall structure of the fixing seat in the guide seat according to the embodiment of the invention;
fig. 5 is a schematic diagram of the overall structure of the fixing seat in the guide seat under another view angle in the embodiment of the invention;
FIG. 6 is a schematic diagram illustrating an assembly structure of a first stay wire, a second stay wire, and a holder fixing seat according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an assembly structure of a first stay wire, a second stay wire and a fixing seat of a guide seat under another view angle in an embodiment of the present invention;
FIG. 8 is a B-B cross-sectional view of FIG. 7;
FIG. 9 is a schematic diagram of the overall structure of a wire holder according to an embodiment of the present invention;
FIG. 10 is an assembly view of a stent graft rear release device with an inner tube, a rear anchor and a guidewire tube in a stent graft implantation system according to an embodiment of the present invention;
FIG. 11 is an exploded view of the assembly of a stent graft rear release device with an inner tube, an outer tube, a rear anchor and a guidewire tube in a stent graft implantation system according to an embodiment of the present invention;
FIG. 12 is a schematic view of the whole structure of a fixing seat of a guide holder in a second alternative embodiment of a locking structure according to the embodiment of the present invention;
Fig. 13 is a schematic view showing the overall structure of a fixing seat of a guide holder in a third alternative embodiment of a locking structure according to an embodiment of the present invention.
The icons are 100-guide seat, 111-fixed seat, 112-guide head, 101-first installation through hole, 110-first stay wire through hole, 120-locking ring fixing groove, 130-boss, 1301-boss through hole, 140-second stay wire limit groove, 150-connection hole, 200-stay wire seat, 201-second installation through hole, 210-fixing ring, 300-first stay wire, 310-elastic limit head, 400-second stay wire, 410-ferrule, 510-spiral groove, 520-elastic tube, 530-elastic locking ring, 540-first stay wire fixing groove, 541-first fixing groove, 542-second fixing groove, 600-covered film bracket, 710-guide wire tube, 7100-connection part, 720-inner tube, 730-outer tube and 740-rear fixer.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in place when the inventive product is used, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, or in communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following embodiments and features of the embodiments may be combined with each other without conflict.
Example 1
The present embodiment provides a post-stent-graft release device, referring to fig. 1 to 3, which includes a guide holder 100, a wire holder 200, a first wire 300, a second wire 400, and a locking structure.
The first wire 300 and the second wire 400 are made of flexible materials, the direction extending from the proximal end of the guide seat 100 to the distal end of the guide seat 100 is taken as the axial direction of the guide seat 100, the direction extending from the proximal end of the wire seat 200 to the distal end of the wire seat 200 is taken as the axial direction of the wire seat 200, the guide seat 100 is provided with a first mounting through hole 101 penetrating through the guide seat 100 along the axial direction of the guide seat 100, and the wire seat 200 is provided with a second mounting through hole 201 penetrating through the wire seat 200 along the axial direction of the wire seat 200.
The first wire 300 is wound around the outer circumferential surface of the guide holder 100 or the inner circumferential surface of the guide holder 100, one end of the first wire 300 is fixedly connected to the wire holder 200, the locking structure fixes the other end of the first wire 300 to the guide holder 100, the second wire 400 is provided with a plurality of second wires 400, one ends of the second wires 400 are fixedly connected to the guide holder 100, the second wires 400 are distributed around the radial circumferential surface of the guide holder 100 at intervals, the other ends of the second wires 400 are used as free ends of the second wires 400, the free ends of the second wires 400 are fixed between the first wires 300 and the guide holder 100, and under the condition that the wire holder 200 moves in a direction away from the guide holder 100, the first wires 300 can be separated from the guide holder 100, so that the free ends of the second wires 400 are released.
In this embodiment, the proximal end refers to the end of the medical apparatus that is close to the blood vessel of the patient when working, and the distal end refers to the end of the medical apparatus that is close to the doctor, wherein the flexible materials for making the first pull wire 300 and the second pull wire 400 may be, but not limited to, PA (polyamide, commonly called nylon), PP (Polypropylene), PET (Polyethylene terephthalate, commonly called polyester resin) or the like, or soft stainless steel, cobalt chrome alloy, titanium alloy or the like, preferably, the flexible materials are selected from inelastic or less elastic materials, so as to avoid the tensile deformation of the first pull wire 300 and the second pull wire 400, as shown in fig. 3, the guide holder 100 includes a fixing base 111 and a guide head 112, the distal end of the guide head 112 is connected to the proximal end of the fixing base 111, the fixing base 111 is used for fixing the first pull wire 300 and the second pull wire 400 in cooperation with the locking structure and the wire holder 200, the guide head 112 and the fixing base 111 may be in an integrally formed structure, as shown in fig. 5, a connecting hole 150 is also formed on the proximal end surface of the fixing base 111, and simultaneously the guide head 112 is also connected to the connecting hole 112 or the fixing base 112 by connecting the guide head 112 to the connecting hole 112 in the connecting hole or the fixing base 112.
In use, in a first step, the stent graft is integrally mounted to the stent graft implantation system, specifically, referring to fig. 10 and 11, the stent graft 600 is compressed in the outer tube 730 of the delivery device, the rear holder 740 is fixed at the rear end of the stent graft 600 from the inside of the outer tube 730, the inner tube 720 is screwed or welded or interference fit or otherwise fixedly connected to the distal end of the stent graft 200, the proximal end of the inner tube 720 can extend into the second mounting through hole 201 on the stent graft 200, the proximal end of the guidewire tube 710 is fixedly connected to the first mounting through hole 101 on the guidewire graft 100 in a variety of manners, such as, but not limited to, providing a connecting portion 7100 at the proximal end of the guidewire tube 710, welding the connecting portion 7100 into the first mounting through hole 101, or providing a connecting thread on the wall of the first mounting through hole 101, screwing the proximal end of the guidewire tube 710 into the first mounting through hole 101, or the like; the opposite end of the second wire 400 fixed to one end of the guide holder 100, that is, the free end of the second wire 400 is passed through a link provided at the proximal end of the stent graft 600, and then the free end of the second wire 400 is fixed between the first wire 300 and the guide holder 100 by fixing the end of the first wire 300 remote from the wire holder 200 to the guide holder 100 using a locking structure, at this time, the stent graft fixation release device binds the proximal end of the stent graft so that the proximal end of the stent graft is in a collapsed state, the guide wire is passed through the wire guide tube 710, the stent graft fixation release device loaded with the stent graft 600 is delivered to the lesion site of the patient along the guide wire percutaneous puncture using a conveyor, the outer tube 730 is withdrawn using the operating handle of the conveyor so that the distal end of the stent graft 600 is released from the outer tube 730, the method comprises the steps of (a) setting up a stent graft 600 in a semi-release manner, (b) setting up an inner tube 720 by using an operation handle of a conveyor, setting up the inner tube 720 with a wire holder 200, pulling a first wire 300, releasing the free ends of the first wire 300 from a locking structure to release from a guide holder 100, thereby releasing the free ends of a plurality of second wires 400 and further releasing the proximal ends of the stent graft 600, thereby releasing the stent graft 600 entirely, and (c) setting up the whole conveyor and guiding a guide wire. The hanging ring arranged on the bracket at the proximal end of the covered stent 600 can be formed by directly bending the metal framework of the covered stent 600, or can be independently arranged and connected with the proximal end of the metal framework of the covered stent 600.
In the stent graft fixing and releasing device provided by the embodiment, firstly, the first pull wire 300 and the second pull wire 400 which are made of flexible materials are adopted, no edges and corners are generated during bending, the flexibility of the structure of the proximal end of the stent graft 600 of the stent graft fixing and releasing device can be ensured, scraping damage to blood vessels can be greatly reduced during operation, on the basis, the operation matters such as, but not limited to, the second pull wire 400 penetrating through the position of the hanging ring at the proximal end of the stent graft 600 are paid attention to, so that the deformation of the stent graft 600 is restrained to be small when the outer tube 730 is withdrawn for semi-releasing the stent graft 600, and therefore, when the stent graft 600 is completely released, the buffer effect can be achieved, the blood vessels are further protected, even the scraping to the blood vessels can not be caused, and therefore, the damage to the blood vessels in the operation process is greatly reduced. In addition, in the present embodiment, when the stent graft 600 is completely released, the stent graft 600 is gradually and slowly released by pulling the first wire 300 backward, and the first wire 300 is wound around the outer circumferential surface of the guide holder 100 or the inner circumferential surface of the guide holder 100, that is, during the releasing process, each hanging ring on the stent graft 600 is relatively independent, and the two adjacent hanging rings are sequentially and slowly released, so that the impact on the blood vessel from each releasing is small, and the whole releasing process is safer.
In summary, this embodiment at least alleviates the technical problems that the structure of the constrained stent graft proximal end of the stent graft fixing and releasing device in the prior art is mostly a hard metal wire or a rigid metal fork structure, which is very easy to scratch the blood vessel in a narrow and curved blood vessel channel, causes vascular injury and even rupture, is slightly careless, and causes fatal injury to a patient, and when the stent graft proximal end is released by the existing stent graft rear releasing device, the proximal end portion of the stent graft is simultaneously and outwards sprung open, and the release process also causes great injury to the blood vessel, thereby causing high operation difficulty and low operation success rate.
In this embodiment, the specific structural form of the locking structure is various, for example, but not limited to:
in a first alternative implementation of the locking structure of this embodiment, referring to fig. 1 to 9, the locking structure includes a spiral groove 510 disposed on an outer peripheral surface of the guide holder 100 or an inner peripheral surface of the guide holder 100, the notch of the spiral groove 510 is configured to be capable of fixing the first wire 300 disposed inside the spiral groove 510 in a pressing manner, so that the free end of the second wire 400 is fixed between the groove wall of the spiral groove 510 and the first wire 300, specifically, the thickness of the first wire 300 in a direction perpendicular to the length direction of the first wire 300 is slightly greater than the depth of the spiral groove 510, the notch of the spiral groove 510 is a narrow gap structure, and when the first wire 300 is installed in the spiral groove 510 in a penetrating manner, the notch of the spiral groove 510 presses and fixes the first wire 300 inside the spiral groove 510, a large friction force is provided between the first wire 300 and the spiral groove 510, and the wire holder 200 needs to be pulled to the distal end to apply a large friction force to the first wire 300 so as to release the first wire 300 from the free end of the first wire 300 beyond the guide holder 100.
With continued reference to fig. 1 to 9, in this alternative embodiment, preferably, the locking structure further includes an elastic tube 520, the elastic tube 520 is fixed inside the spiral groove 510, the first wire 300 is pressed and fixed inside the elastic tube 520, or the elastic tube 520 is pressed and fixed inside the spiral groove 510, and the first wire 300 is fixed inside the elastic tube 520, wherein the elastic tube 520 may be made of, but not limited to, a silicone material, so that the friction force between the first wire 300 and the spiral groove 510 may be increased by using the elastic force of the elastic tube 520, thereby ensuring the implantation stability of the stent graft, and avoiding the stent graft from loosening in advance when it is not at the implantation position. It is further preferable that the above elastic tube 520 includes a plurality of sections spaced apart from each other, so that the length and position of the first wire 300 can be adjusted by being bent at will when the first wire 300 is mounted to the spiral groove 510, and the operation is more flexible. Preferably, the depth of the spiral groove 510 is larger than the diameter of the elastic tube 520, so that the spiral groove 510 can accommodate the elastic tube 520 and limit the elastic tube 520, thereby avoiding the elastic tube 520 from exposing the spiral groove 510 to scrape the vessel wall, and further improving the safety of the operation.
In addition, in the present alternative embodiment, the depth of the above spiral groove 510 is preferably greater than the thickness of the first pull wire 300 in the direction perpendicular to the length direction of the first pull wire 300 itself, so that the spiral groove 510 can accommodate the first pull wire 300 and perform a limiting function on the first pull wire 300, thereby preventing the first pull wire 300 from exposing the spiral groove 510 to scrape the vessel wall, and further improving the safety of the operation.
In addition, in this alternative embodiment, preferably, the guide holder 100 is further provided with a first wire penetrating hole 110, one end of the first wire penetrating hole 110 is communicated with the distal end face of the guide holder 100, the other end of the first wire penetrating hole 110 is communicated with the portion of the spiral groove near the distal end of the guide holder, and the first wire penetrating hole 110 is used as a penetrating channel of the portion of the first wire 300 between the portion of the first wire 300, which is connected to the end of the wire holder 200 and the portion thereof located in the spiral groove 510, so as to avoid exposing the portion of the first wire 300 outside the guide holder 100, thereby scraping the blood vessel, and being beneficial to improving the surgical safety as well.
In a second alternative implementation of the locking structure of the present embodiment, referring to fig. 12, the locking structure includes an elastic locking ring 530, and the elastic locking ring 530 is configured to be capable of pressing and fixing an end of the first wire 300, which is far from the wire holder 200, to an outer circumferential surface of the guide holder 100, or pressing and fixing an end of the first wire 300, which is far from the wire holder 200, to an inner circumferential surface of the guide holder 100. The specific extrusion fixing principle of the locking structure for extrusion fixing the first pull wire 300 in this alternative embodiment depends on the elastic performance of the elastic locking ring 530, the elastic locking ring 530 applies a larger pressure to the first pull wire 300, so that a larger friction force exists between the first pull wire 300 and the guide seat 100 and between the first pull wire 300 and the elastic locking ring 530, the first pull wire 300 needs to be applied to the first pull wire 300 to overcome the friction force to pull the first pull wire 300 out of the elastic locking ring 530, the elastic locking ring 530 may be, but not limited to, an annular structure made of rubber, silica gel or high polymer material or other elastic material, or a spring ring, or a rigid annular structure with a rigid material at the center, and the rigid annular structure is wrapped with an elastic layer made of rubber, silica gel or high polymer material or other elastic material, and the like, which is in a compressed and tensed state after being sleeved on the outer peripheral surface or inner peripheral surface of the guide seat 100, so as to provide a sufficient friction force to ensure that the first pull wire 300 is not separated from the guide seat 100, and the specific shape of the elastic locking ring 530 includes, but not limited to a rectangular ring, an elliptical ring, or other annular shape.
Further preferably, a locking groove 120 extending in a radial circumferential direction of the guide holder 100 is further provided on an inner circumferential surface of the guide holder 100 or an outer circumferential surface of the guide holder 100 to further increase a locking force of the elastic locking ring 530.
Still further preferably, the locking groove 120 has a depth greater than the thickness of the ring body of the elastic locking ring 530 to limit the elastic locking ring 530 from scraping the vessel wall by the elastic locking ring 530.
In a second alternative implementation of the locking structure of the present embodiment, referring to fig. 13, the locking structure includes a first wire fixing groove 540 provided on an outer circumferential surface of the guide holder 100 or an inner circumferential surface of the guide holder 100, the first wire fixing groove 540 includes a first fixing groove 541 and a second fixing groove 542, one end of the first fixing groove 541 is connected to one end of the second fixing groove 542, a depth of the second fixing groove 542 is greater than that of the first fixing groove 541, the first wire 300 passes through the first fixing groove 541, an end portion of the first wire 300, which is remote from the wire holder 200, is provided with the elastic stopper 310, the elastic stopper 310 is configured to be capable of being compressed to a maximum thickness of the elastic stopper 310 smaller than that of the first fixing groove 541, and in a case that the elastic stopper 310 is not compressed, the maximum thickness of the elastic stopper 310 is greater than that of the first fixing groove 541, and a notch of the second fixing groove 542 is configured to be capable of restricting the elastic stopper 310 within the second fixing groove 542. When the first wire 300 is pulled backward, the elastic stopper is elastically deformed to be separated from the second fixing groove 542 and overcomes the friction force with the first fixing groove 541 so that the first wire 300 is completely pulled out of the first wire fixing groove 540.
In addition, with continued reference to fig. 1-9, in each alternative implementation of the present embodiment, it is preferable that a ferrule 410 is disposed at the free end of each second wire 400, and the first wire 300 sequentially passes through ferrules 410 on the free ends of the plurality of second wires 400.
In addition, in the present embodiment, there are various specific connection manners in which one end of the first wire 300 is fixedly connected to the wire holder 200, for example, but not limited to, the one end of the first wire 300 is fixedly connected to the wire holder 200 by bonding or welding, or the first wire 300 is directly integrated with the wire holder 200, wherein, with continued reference to fig. 1 to 9, it is preferable that a fixing ring 210 is provided on the wire holder 200, and the one end of the first wire 300 is fixedly connected to the wire holder 200 by knotting after passing through the fixing ring 210.
In addition, with continued reference to fig. 1 to 9, in each alternative implementation manner of the present embodiment, it is preferable that a plurality of bosses 130 are provided on the outer peripheral surface of the guide holder 100, and the plurality of bosses 130 are configured to hook the hanging ring at the proximal end of the stent graft 600 onto the guide holder 100, and by such a structure, the hanging ring at the proximal end of the stent graft 600 in the collapsed state can be limited by using the gap between two adjacent bosses 130, so that the transportation stability of the stent graft 600 in the implantation process is ensured, and the hanging ring at the proximal end of the stent graft 600 is prevented from scraping the vessel wall. With continued reference to fig. 1 to 9, preferably, each boss 130 is provided with a boss hole 1301, and the opposite end of the free end of the second wire 400 is fixedly connected to the boss hole 1301.
In addition, with continued reference to fig.1 to 9, in each alternative implementation manner of the present embodiment, it is preferable that a plurality of second wire limiting grooves 140 are formed on the outer peripheral surface of the guide holder 100 or the inner peripheral surface of the guide holder 100, the plurality of second wire limiting grooves 140 are in one-to-one correspondence with the plurality of second wires 400, and one ends of the plurality of second wire limiting grooves 140 extend to the distal end surface of the guide holder 100. The plurality of second wire limiting grooves 140 are used for accommodating the second wires 400 and limiting the second wires 400, so as to avoid interference between adjacent second wires 400 or between the second wires 400 and other structures during operation. It is further preferable that the depth of the second wire limiting groove 140 is greater than the thickness of the second wire 400 in a direction perpendicular to the length extension direction of the second wire 400 itself. For example, but not limited to, the cross-sectional shape of the second pull wire 400 in the direction perpendicular to the length extension direction of the second pull wire 400 is circular, and then the depth of the second pull wire limiting groove 140 is larger than the diameter of the second pull wire 400 in the cross-section perpendicular to the length extension direction of the second pull wire 400, so that the second pull wire 400 can be limited by the second pull wire limiting groove 140, and the second pull wire 400 is prevented from being exposed out of the second pull wire limiting groove 140 to scratch the vessel wall, thereby further improving the operation safety.
In addition, with continued reference to fig. 3, 10 and 11, in each alternative implementation of the present embodiment, it is preferable that the outer circumferential surface of the proximal end of the guide holder 100 is a round table side surface with a gradually increasing diameter from the proximal end of the guide holder 100 toward the distal end of the guide holder 100, and the setting of the round table side surface can avoid the proximal end of the guide holder 100 scraping the blood vessel to protect the blood vessel during the advancing of the guide holder 100 by operating the outer tube 730 through the operating handle, so as to further reduce the damage of the operation on the blood vessel.
In addition, in each alternative implementation of the present embodiment, it is preferable that the X-ray developing material is connected to the first wire 300 and/or the second wire 400, wherein "and/or" means that the X-ray developing material is connected to only the first wire 300, or the X-ray developing material is connected to only the second wire 400, or the X-ray developing material is connected to both the first wire 300 and the second wire 400, and the alternative implementation can enable the process that the first wire 300 is pulled and the second wire 400 is released under the X-rays to be clearly detected, and more precisely know the opening time and the opening position of the stent graft 600 during the releasing process, thereby improving the operation accuracy.
Example two
The present embodiment provides a stent graft implantation system, referring to fig. 10 and 11, and referring to fig. 1 to 9 and fig. 12 and 13, which includes an operation handle, a guide wire tube 710, an inner tube 720, an outer tube 730, and a stent graft rear release device according to any one of the optional embodiments of the embodiment, wherein the guide wire tube 710 passes through the inner tube 720, and the guide wire tube 710 passes through the second mounting through hole 201, a proximal end of the guide wire tube 710 is fixed inside the first mounting through hole 101, a proximal end of the inner tube 720 is fixed at a distal end of the wire holder 200, and both a distal end of the outer tube 730 and a distal end of the inner tube 720 are connected to the operation handle, and the operation handle is configured to be capable of driving the outer tube 730 and the inner tube 720 to move back and forth.
Since the stent graft implantation system provided in this embodiment includes the stent graft rear release device described in embodiment one, the stent graft implantation system provided in this embodiment can achieve all the advantages achieved by the stent graft rear release device in embodiment one, and the specific structure and the effects achieved by the stent graft rear release device can be obtained by referring to the optional or preferred implementation manner in embodiment one, where in each optional implementation manner of this embodiment, preferably, the stent graft implantation system further includes a rear anchor 740, the rear anchor 740 is disposed in the outer tube 730, the inner tube 720 passes through the rear anchor 740, and the distal end of the rear anchor 740 is connected to the operating handle, and the operating handle is further configured to drive the rear anchor 740 to move back and forth in the outer tube 730, so that the front end of the rear anchor 740 abuts against or releases the rear end of the stent graft 600, thereby increasing the stability of the stent graft 600 during implantation.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (18)
1. The release device behind the covered stent is characterized by comprising a guide seat (100), a stay wire seat (200), a first stay wire (300), a second stay wire (400) and a locking structure;
A plurality of bosses (130) are arranged on the outer peripheral surface of the guide seat (100), and the bosses (130) are configured to be capable of hooking a hanging ring at the proximal end of a film coating bracket (600) to the guide seat (100);
-the first pull wire (300) and the second pull wire (400) are both made of a flexible material;
Taking the direction extending from the proximal end of the guide seat (100) towards the distal end of the guide seat (100) as the axial direction of the guide seat (100), taking the direction extending from the proximal end of the wire seat (200) towards the distal end of the wire seat (200) as the axial direction of the wire seat (200), arranging a first mounting through hole (101) penetrating through the guide seat (100) along the axial direction of the guide seat (100) on the guide seat (100), and arranging a second mounting through hole (201) penetrating through the wire seat (200) along the axial direction of the wire seat (200) on the wire seat (200);
The first stay wire (300) is coiled on the outer peripheral surface of the guide seat (100) or the inner peripheral surface of the guide seat (100), one end of the first stay wire (300) is fixedly connected with the stay wire seat (200), and the other end of the first stay wire (300) is fixed on the guide seat (100) by the locking structure;
the second stay wires (400) are provided with a plurality of second stay wires (400), one ends of the second stay wires (400) are fixedly connected to the guide seat (100), the second stay wires (400) are distributed around the radial circumferential surface of the guide seat (100) at intervals, the other ends of the second stay wires (400) are used as free ends of the second stay wires (400), ferrules (410) are arranged at the free ends of the second stay wires (400), the first stay wires (300) sequentially penetrate through the ferrules (410) at the free ends of the second stay wires (400), so that the free ends of the second stay wires (400) are fixed between the first stay wires (300) and the guide seat (100), and the first stay wires (300) can be separated from the guide seat (100) under the condition that the stay wires (200) move in the direction away from the guide seat (100), so that the free ends of the second stay wires (400) are released.
2. The post-stent graft release device according to claim 1, wherein the locking structure comprises a spiral groove (510) provided on an outer circumferential surface of the guide holder (100) or an inner circumferential surface of the guide holder (100), and a notch of the spiral groove (510) is configured to be capable of press-fixing a first wire (300) provided inside the spiral groove (510), thereby press-fixing a free end of the second wire (400) between a groove wall of the spiral groove (510) and the first wire (300).
3. The post-stent graft release device of claim 2, wherein the locking structure further comprises an elastic tube (520), the elastic tube (520) being fixed to the inside of the spiral groove (510), the first wire (300) being press-fixed to the inside of the elastic tube (520), or the elastic tube (520) being press-fixed to the inside of the spiral groove (510), the first wire (300) being fixed to the inside of the elastic tube (520).
4. The stent graft rear release device as recited in claim 3, wherein the elastic tube (520) comprises a plurality of sections spaced from each other.
5. The post-stent-graft release device according to any one of claims 2 to 4, wherein the depth of the spiral groove (510) is larger than the thickness of the first wire (300) in a direction perpendicular to the length of the first wire (300) itself.
6. The stent graft rear release device according to claim 3 or 4, wherein the depth of the helical groove (510) is greater than the diameter of the elastic tube (520).
7. The post-stent graft release device according to any one of claims 2 to 4, wherein a first wire passing hole (110) is further provided in the guide holder (100), one end of the first wire passing hole (110) is communicated with the distal end face of the guide holder (100), and the other end of the first wire passing hole (110) is communicated with a portion of the spiral groove near the distal end of the guide holder.
8. The post-stent graft release device of any one of claims 1-4, wherein the locking structure comprises an elastic locking ring (530), the elastic locking ring (530) being configured to enable one end of the first wire (300) remote from the wire holder (200) to be pressed and fixed to an outer circumferential surface of the guide holder (100) or one end of the first wire (300) remote from the wire holder (200) to be pressed and fixed to an inner circumferential surface of the guide holder (100).
9. The stent graft rear release device according to claim 8, wherein a stapling groove (120) extending in a radial circumferential direction of the guide holder (100) is further provided on an inner circumferential surface of the guide holder (100) or an outer circumferential surface of the guide holder (100).
10. The post-stent graft release device of claim 9, wherein the locking groove (120) has a depth greater than the loop thickness of the resilient locking ring (530).
11. The post-stent graft release device of claim 1, wherein the locking structure comprises a first wire fixing groove (540) provided on an outer circumferential surface of the guide holder (100) or an inner circumferential surface of the guide holder (100);
The first stay wire fixing groove (540) comprises a first fixing groove (541) and a second fixing groove (542), wherein one end of the first fixing groove (541) is connected with one end of the second fixing groove (542), and the depth of the second fixing groove (542) is larger than that of the first fixing groove (541);
The end of the first pull wire (300) far away from one end of the pull wire seat (200) is provided with an elastic limit head (310), the elastic limit head (310) is configured to be compressed to a maximum thickness of the elastic limit head (310) smaller than the depth of the first fixing groove (541), and the maximum thickness of the elastic limit head (310) is larger than the depth of the first fixing groove (541) under the condition that the elastic limit head (310) is not compressed;
the notch of the second fixing groove (542) is configured to be able to limit the elastic limit head (310) within the second fixing groove (542).
12. The stent graft rear release device according to any one of claims 1 to 4 and 11, wherein a fixing ring (210) is provided on the stent graft base (200), and one end of the first stent graft (300) is fixedly connected to the stent graft base (200) in such a manner as to be knotted after passing through the fixing ring (210).
13. The post-stent graft release device according to claim 1, wherein each boss (130) is provided with a boss through hole (1301), and the opposite end of the free end of the second stay wire (400) is fixedly connected to the boss through hole (1301).
14. The post-stent graft release device according to any one of claims 1 to 4 and 11, wherein a plurality of second wire limiting grooves (140) are formed in the outer circumferential surface of the guide holder (100) or the inner circumferential surface of the guide holder (100), the plurality of second wire limiting grooves (140) are in one-to-one correspondence with the plurality of second wires (400), and one ends of the plurality of second wire limiting grooves (140) extend to the distal end surface of the guide holder (100).
15. The post-stent graft release device of claim 14, wherein the second wire limiting groove (140) has a depth greater than a thickness of the second wire (400) in a direction perpendicular to a length extension of the second wire (400) itself.
16. The stent graft rear release device according to any one of claims 1 to 4 and 11, wherein the outer circumference of the proximal end of the guide holder (100) is a truncated cone side surface having a gradually increasing diameter from the proximal end of the guide holder (100) toward the distal end of the guide holder (100).
17. The post-stent graft release device according to any one of claims 1 to 4 and 11, wherein an X-ray developer is attached to the first pull wire (300) and/or the second pull wire (400).
18. An stent graft implantation system comprising an operating handle, a guidewire tube (710), an inner tube (720), an outer tube (730), and the stent graft post release device of any one of claims 1 to 17, wherein:
The wire guide tube (710) passes through the inner tube (720), and the wire guide tube (710) passes through the second mounting through hole (201), and the proximal end of the wire guide tube (710) is fixed in the first mounting through hole (101);
The distal end of the outer tube (730) and the distal end of the inner tube (720) are both connected to the operating handle, which is configured to be able to drive the outer tube (730) and the inner tube (720) to move back and forth.
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| CN202010764931.4A CN111743670B (en) | 2020-07-31 | 2020-07-31 | Post-release device for stent graft and stent graft implantation system |
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| CN202010764931.4A CN111743670B (en) | 2020-07-31 | 2020-07-31 | Post-release device for stent graft and stent graft implantation system |
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| CN114533357A (en) * | 2020-11-26 | 2022-05-27 | 深圳市先健畅通医疗有限公司 | Conveying device |
| CN113413255B (en) * | 2021-08-24 | 2021-11-16 | 南通欣昌减震器有限公司 | Blood vessel supporting rubber stent |
| CN114098883B (en) * | 2022-01-27 | 2022-06-17 | 上海微创心脉医疗科技(集团)股份有限公司 | Support conveying device and support conveying system |
| CN120241324B (en) * | 2025-06-05 | 2025-09-02 | 北京华脉泰科医疗器械股份有限公司 | Support skeleton, tectorial membrane support, release and vascular treatment subassembly |
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| CN102488576A (en) * | 2011-11-25 | 2012-06-13 | 北京华脉泰科医疗器械有限公司 | Convey and release device for covered stents |
| CN104706449A (en) * | 2013-12-17 | 2015-06-17 | 微创心脉医疗科技（上海）有限公司 | Stent delivery system and later releasing assembly thereof |
| CN212234825U (en) * | 2020-07-31 | 2020-12-29 | 北京华脉泰科医疗器械有限公司 | Post-stent-graft release device and stent-graft implantation system |
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| CN111743670A (en) | 2020-10-09 |
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