CN114098883B - Support conveying device and support conveying system - Google Patents
Support conveying device and support conveying system Download PDFInfo
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- CN114098883B CN114098883B CN202210097111.3A CN202210097111A CN114098883B CN 114098883 B CN114098883 B CN 114098883B CN 202210097111 A CN202210097111 A CN 202210097111A CN 114098883 B CN114098883 B CN 114098883B
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- stent
- branch
- proximal end
- barb
- embedded
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12099—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder
- A61B17/12109—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel
- A61B17/12113—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm
- A61B17/12118—Occluding by internal devices, e.g. balloons or releasable wires characterised by the location of the occluder in a blood vessel within an aneurysm for positioning in conjunction with a stent
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B17/12131—Occluding by internal devices, e.g. balloons or releasable wires characterised by the type of occluding device
- A61B17/12159—Solid plugs; being solid before insertion
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
Abstract
The invention provides a stent conveying device and a stent conveying system, wherein the stent conveying device comprises a rear release assembly, the rear release assembly comprises a bare section fixing piece and a barb protective sleeve, and the barb protective sleeve is arranged on the outer side of the bare section fixing piece in a matching manner from the near end of the bare section fixing piece; the bare section fixing piece is used for compressing and fixing the support ring and the barb structure; the barb protective sleeve is used for protecting the barb structure so as to prevent the barb structure from being exposed, the proximal end of the bare section is protected and fixed through the bare section fixing piece and the barb protective sleeve so as to avoid leakage, the stent conveying device is prevented from being difficult to scratch and rub the edge of the positioned stent graft when the stent graft is released and then withdrawn, and the displacement of the stent graft when the stent graft is released is also avoided, so that the precise release of the stent graft is realized, and the barb of the stent conveying system in the operation is prevented from scratching blood vessels when the over-selected renal artery moves.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a stent conveying device and a stent conveying system.
Background
An Abdominal Aortic Aneurysm (AAA) is a common aortic disease, and epidemiological studies show that the incidence rate of men is 3.9-7.2% in people over 50 years old, the incidence rate of women is 1.0-1.3%, the incidence rate of patients over 80 years old and old is increased by 4% every 10 years old after 55 years old, and the incidence rate of patients over 80 years old and old is increased to 10%, and the risk of tumor body rupture of patients over 80 years old and old is higher than that of other people. It is known that up to 2020, the population over 80 years of China has reached 3000 million and the population over 90 years of China has exceeded 1200 million, which makes more and more advanced AAA patients to receive treatment in the future.
The current major modes of treatment of abdominal aortic aneurysms include traditional open surgery and intraluminal repair of abdominal aortic aneurysms. The abdominal aorta endoluminal repair (EVAR) has been rapidly developed in as short as 20 years due to the advantages of small trauma, short operation and hospitalization time, fast postoperative recovery, low operative mortality, low incidence of complications, etc. However, the biggest limitations of abdominal aortic endoluminal repair are: the inability of visceral aorta to be covered, particularly the superior mesenteric and renal arteries, to cause intraluminal repair of abdominal aortic aneurysms in the field of renal arteries remains a difficult problem. When the initial position of the abdominal aortic aneurysm of a patient is below the superior mesenteric artery and the distance between the initial position and the lower edge of the superior mesenteric artery is greater than 5mm, the current standard vascular stent cannot simultaneously ensure that the stent does not shift and the blood flow of the double renal arteries and the superior mesenteric artery is unobstructed, which are fatal to the patient. The fenestration stent carries out short-tumor neck abdominal aortic aneurysm intracavity repair on the patients, namely, a covered stent is implanted in the abdominal aorta, branches are embedded in the fenestration of the covered stent in advance, and the branch stent is led into main branch blood vessels such as double renal arteries, celiac trunk arteries, superior mesenteric arteries and the like through the fenestration position to realize the vascular reconstruction of the double renal arteries and the superior mesenteric arteries. In the operation, after the covered stent is implanted into an arterial blood vessel, consumables such as a guide wire and a catheter need to be operated firstly to be selected into an open window position of the covered stent, and then the consumables are further selected into a branch blood vessel. When an operator selects a guide wire and a catheter, the branch guide wire is difficult to guide to reach the branch blood vessel, and the reason is that the branch guide wire passes through the fenestrated embedded branch of the covered stent to reach the branch blood vessel, wherein the far end of the branch guide wire is aligned with and passes through the fenestrated embedded branch of the covered stent.
Therefore, how to effectively reduce the difficulty of the branch guide wire reaching the branch blood vessel through the fenestration embedded branch is a problem which must be solved by medical staff and medical research and development staff at present.
Disclosure of Invention
One of the objectives of the present invention is to provide a stent delivery device and a stent delivery system, which can achieve precise release of a stent graft, avoid the blood vessel from being scratched by barbs when the stent system moves during an operation, and avoid the stent graft from being withdrawn after the delivery system is released.
The invention also aims to solve the problem that the branch guide wire is difficult to penetrate out of the windowing position of the covered stent and enter a branch blood vessel; meanwhile, the phenomenon that a plurality of pre-buried guide wires are wound in the autologous blood vessel is avoided.
In order to solve the above problems, the present invention provides a stent delivery device, comprising a rear release assembly, wherein the rear release assembly comprises a bare section fixing member and a barb protecting sleeve, and the barb protecting sleeve is arranged on the outer side of the bare section fixing member from the proximal end of the bare section fixing member; the bare section fixing part is used for compressing and fixing the bare section of the covered stent; the barb protective sleeve is used for protecting the barb structure of the bare section so that the barb structure is not exposed.
Optionally, the bare section fixing member sequentially includes a first section, a second section and a third section from a distal end to a proximal end along an axial direction of the bare section fixing member, the first section is used for compressing and fixing the proximal end of the stent ring of the bare section, the second section is used for placing the barb structure and preventing the barb structure from being exposed, and the barb protective sleeve is sleeved on an outer side of the bare section fixing member and at least partially covers the bare section fixing member.
Further, the barb protective sleeve covers the second section, the third section and the proximal end of the first section of the bare section fixing element.
Further, the first section comprises a first main body and a plurality of ribs uniformly distributed along the circumferential direction of the first main body, the ribs are used for clamping the near end of the support ring, and the axial direction of each rib is the same as that of the first main body.
Further, a space exists between a proximal end of each of the ribs and a proximal end of the first body, the space being used to suspend a proximal end of the stent ring.
Further, the distal end of the first section is tapered, and the distal ends of the plurality of ribs have chamfered surfaces with the same taper as the distal end of the first section.
Furthermore, the second section is provided with a plurality of clamping grooves, each clamping groove is opposite to one ridge, the clamping grooves are used for placing the barb structures and preventing the barb structures from being exposed, and the quantity of the clamping grooves is the same as that of the barb structures.
Further, the barb protective sleeve comprises a cylindrical part, the cylindrical part is provided with a cavity penetrating through the distal end face of the cylindrical part, at least part of the bare section fixing part is arranged in the cavity, the distal end of the first section is arranged close to the distal end of the cylindrical part, and the proximal end of the third section is arranged close to the proximal end of the cylindrical part.
Furthermore, the outer side wall of the cylindrical part is provided with at least one groove which is axially arranged along the cylindrical part, the opening of the groove axially extends to the two ends of the cylindrical part, and the groove is used for providing a distribution space for the embedded guide wire.
Further, the barb protective sleeve further comprises a screw rod, the rear release assembly further comprises a conical head, the far end of the screw rod is connected with the near end of the cylindrical part, and the barb protective sleeve is connected with the conical head through the screw rod.
Optionally, still include handle components, outer tube assembly and pre-buried seal wire, handle components's near-end is connected the distal end of outer tube assembly, the near-end setting of outer tube assembly is in the distal end of back release subassembly, the outer tube assembly is used for loading the tectorial membrane support, the distal end of pre-buried seal wire passes outer tube assembly after-fixing on the handle components, the near-end of pre-buried seal wire is through installing tectorial membrane support last is to the near-end extension, and stretch out the near-end of pre-buried seal wire the near-end of back release subassembly, pre-buried seal wire is used for guiding the branch seal wire to follow tectorial membrane support's embedded branch of windowing is worn out tectorial membrane support's inner chamber.
The invention provides a stent delivery system, which comprises a stent delivery device and a covered stent, wherein the covered stent comprises a naked section, the naked section is arranged at the near end of the covered stent, the naked section comprises a stent ring and a barb structure, the barb structure is arranged at the near end of the stent ring, and the near end of the stent ring is clamped on a plurality of ridges.
Optionally, the stent ring is formed by joining a plurality of wave bars end to end, the joining points at the proximal end of the stent ring form wave crests, and the joining points at the distal end of the stent ring form wave troughs; and
the distance exists between the near end part of each ridge and the near end part of the first main body, the two wave rods which are connected to form the wave troughs are clamped between the two adjacent ridges, the two wave rods which are connected to form the wave crests are respectively arranged on two sides of the corresponding ridge, and the wave crests are arranged in the distance.
Optionally, the stent graft further comprises a stent graft, the distal end of the bare segment is connected with the proximal end of the stent graft, the stent graft is provided with at least one fenestrated embedded branch, each fenestrated embedded branch is used for establishing a passage of a branch blood vessel directly opposite to the fenestrated embedded branch, and the distal end of the stent graft comprises an ipsilateral branch and a contralateral branch.
Further, the mode that the proximal end of the embedded guide wire passes through the covered stent comprises:
when the direction of the windowing embedded branch faces the far end of the covered stent, the near end of the embedded guide wire penetrates into the far-end inner cavity of the covered stent from the opposite side branch, penetrates out of the windowing embedded branch to the far-end outer cavity of the covered stent, and extends towards the near end of the stent conveying device; and/or
When the direction of the windowing embedded branch faces the near end of the covered stent, the near end of the embedded guide wire penetrates into the near end inner cavity of the covered stent from the far end outer cavity of the covered stent through the windowing embedded branch, then penetrates out of the near end inner cavity of the covered stent, and extends towards the near end of the stent conveying device.
Further, the device further comprises a guiding device, the guiding device comprises a multi-cavity tube, the rear release assembly further comprises a conical head, the far end of the multi-cavity tube is attached to the near end of the conical head, the multi-cavity tube is provided with at least one inner cavity axially arranged along the multi-cavity tube, and each inner cavity is used for placing one embedded guide wire;
the number of the inner cavities and the number of the embedded guide wires are the same as the number of the windowing embedded branches.
The guide device comprises a branch guide part, the branch guide part comprises a guide sheath pipe and a guide catheter, and the guide sheath pipe penetrates out of the opening of the branch embedded in the windowing under the guide of the embedded guide wire; the guiding catheter is movably arranged in the guiding sheath, the near end of the guiding catheter extends out of the guiding sheath to a preset position, and the guiding catheter is used for passing through the branch guide wire and establishing a passage of the branch support.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a stent conveying device and a stent conveying system, wherein the stent conveying device comprises a rear release assembly, the rear release assembly comprises a bare section fixing piece and a barb protective sleeve, and the barb protective sleeve is arranged on the outer side of the bare section fixing piece from the near end of the bare section fixing piece; the bare section fixing piece is used for compressing and fixing the support ring and the barb structure; the barb protective sheath is used for protecting the barb structure, so that the barb structure is not exposed to protect and fix the near-end of the bare section through the bare section fixing piece and the barb protective sheath, so as to avoid the outer leakage of the barb structure, prevent the edge of the positioned covered stent from being scratched easily when the stent conveying device retracts after releasing the covered stent, and avoid the displacement of the covered stent during releasing, thereby realizing the accurate releasing of the covered stent and avoiding the barb blood vessel scratch of the intraoperative stent conveying system when the hyperelective renal artery moves.
Further, the stent delivery system of the present invention comprises, in a manner that the proximal end of the embedded guide wire passes through the stent graft: when the direction of the windowing embedded branch faces the far end of the covered stent, the near end of the embedded guide wire penetrates into the far-end inner cavity of the covered stent from the opposite side branch, penetrates out of the windowing embedded branch to the far-end outer cavity of the covered stent and extends towards the near end of the stent conveying device; and/or when the direction of the windowing embedded branch faces the near end of the covered stent, the near end of the embedded guide wire penetrates into the near end inner cavity of the covered stent from the far end outer cavity of the covered stent through the windowing embedded branch, then penetrates out of the near end inner cavity of the covered stent, and extends towards the near end of the stent conveying device; the guide device comprises a branch guide part, the branch guide part comprises a guide sheath pipe and a guide catheter, and the guide sheath pipe penetrates out of an opening of the windowing embedded branch under the guide of the embedded guide wire; the guiding catheter is movably arranged in the guiding sheath, the proximal end of the guiding catheter extends out of the guiding sheath to the opening (namely a preset position) of the branch blood vessel, and the guiding catheter is used for passing through the branch guide wire and establishing a path of the branch stent; the invention is provided with a corresponding pre-embedded guide wire passing through the covered stent according to the orientation of the windowing embedded branch and different over-selection modes according to the orientation of the windowing embedded branch, thereby solving the problem that the branch guide wire is difficult to enter the branch vessel.
In addition, stent delivery system's guiding device includes the multi-chamber pipe before stent delivery system reachs the target location, the distal end laminating of multi-chamber pipe set up in the near-end of cone, the multi-chamber pipe has at least one and follows the inner chamber that the multi-chamber pipe axial set up, every the inner chamber is used for placing one pre-buried seal wire to avoid a plurality of pre-buried seal wires of leading to take place intertwine's phenomenon in the blood vessel, thereby guaranteed the security and the high efficiency of operation.
Drawings
Fig. 1 is a schematic structural diagram of a stent delivery device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a rear release assembly according to an embodiment of the present invention;
FIGS. 3a-3b are schematic structural views of a bare segment fastener according to an embodiment of the invention;
FIGS. 4a-4b are schematic views of a barb protective sleeve according to an embodiment of the invention;
FIGS. 5a-5c are schematic structural views of an embedded guidewire passing through a stent graft according to an embodiment of the present invention;
FIGS. 6a-6e are schematic structural views illustrating the process of establishing a branch stent channel by a hyper-selective branch vessel with the opening of the branch vessel facing downward according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a process of establishing a branch stent channel by a hyper-selective branch vessel when an open blood flow of the branch vessel is upward according to an embodiment of the present invention;
FIGS. 8a-8c are schematic radial cross-sectional views of a multi-lumen tube in accordance with an embodiment of the present invention;
fig. 9 is a schematic diagram of a dual lumen tube for delivering pre-embedded guidewire from the femoral artery to the axillary artery, in accordance with an embodiment of the present invention.
Description of reference numerals:
1-a stent delivery device; 11-a handle assembly; 12-an outer tube assembly; 121-an outer tube; 122-an inner tube; 13-post release assembly; 130-an inner bore; 131-a bare section fixing element; 1311-first stage; 1311 a-a first body; 1311 b-edge; 1312-a second section; 1313-third section; 132-a barb protective sleeve; 1321-a cylindrical portion; 1322-screw; 1323-grooves; 133-a conical head; 134-card slot; 14. 14' -pre-burying a guide wire;
2-covered stent; 21-a bare segment; 211-a scaffold ring; 212. 221' -barb structures; 22-a laminating section 22; 221-windowing inline branches; 222-ipsilateral branching; 223-contralateral branch;
3-a guiding device; 31-a multi-lumen tube; 311-lumen; 312-a conical depression; 32-a branch guide member; 321-a guiding sheath; 322-a guiding catheter;
41. 42-branch vessels; 43-branch guide soft guide wire; the 43' -branch guides the hard guide wire.
Detailed Description
A stent delivery device and a stent delivery system of the present invention will be described in further detail below. The present invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, it being understood that one skilled in the art may modify the invention herein described while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific details must be set forth in order to achieve the developer's specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art.
In order to make the objects and features of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise ratio for the purpose of facilitating and distinctly aiding in the description of the embodiments of the invention. As used herein, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The terms "inner", "outer", and the like as used herein are for illustrative purposes only and do not denote a unique embodiment. Herein, the terms "distal" and "proximal" are all relative orientations, relative positions, directions of elements or actions with respect to each other from the perspective of a physician using the medical device, and although "distal" and "proximal" are not intended to be limiting, "proximal" generally refers to the end that enters the patient's body first, the opposite end being distal.
The core of the invention is to provide a stent conveying device, which comprises a rear release assembly, wherein the rear release assembly comprises a bare section fixing piece and a barb protective sleeve, and the barb protective sleeve is arranged on the outer side of the bare section fixing piece from the near end of the bare section fixing piece; the bare section fixing part is used for compressing and fixing the bare section of the covered stent; the barb protective sleeve is used for protecting the barb structure of the bare section so that the barb structure is not exposed.
Still provide a stent delivery system, include stent delivery device, still include the covered stent, the covered stent includes naked section, naked section set up in the proximal end of covered stent, naked section includes support ring and barb structure, the barb structure set up in the proximal end of support ring. According to the invention, the proximal end and the barb structure of the stent ring are arranged in the bare section fixing piece, and the proximal end and the barb structure of the stent ring are protected from the outer side wall of the bare section through the barb protective sleeve, so that the stent conveying device is not easy to scratch and rub the edge of the positioned covered stent when the covered stent is released and retracted, and the problem of moving towards the far end or the near end after the covered stent is released can not occur due to the fixation of the rear release assembly on the proximal end of the covered stent, thereby improving the precision of the conveying device for releasing the covered stent and accurately positioning the covered stent.
Referring to fig. 1 and fig. 5a-5c, the present embodiment provides a stent delivery device 1, wherein the stent delivery device 1 is used for installing, delivering and releasing a stent graft 2, and also used for delivering a guiding device for assisting in opening the branch stent.
Referring to fig. 2 and 3a-3b, the stent delivery device 1 comprises a rear release assembly 13 from the distal end to the proximal end along the axial direction, and the rear release assembly 13 comprises a bare-section fixing element 131 and a barb protection sleeve 132. The rear release assembly 13 has an internal bore 130 along its axis, the internal bore 130 extending axially through the bare segment anchor 131 and the barb protection sleeve 132 and is used to place a liner guide wire.
The bare segment fixing member 131 is used to compressively fix the bare segment 21 of the stent graft 2 on the stent delivery device 1 and to allow the stent graft 2 to be disposed stationary relative to the stent delivery device 1. The bare segment fixing member 131 is machined from a metal material. The bare segment fixing member 131 includes, in order from the distal end to the proximal end in its axial direction, a first segment 1311, a second segment 1312, and a third segment 1313.
The distal end of the first segment 1311 is tapered such that the distal end of the rib 1311b has a chamfered surface with the same taper as the distal end of the first segment 1311, such that the stent delivery device 1 is less likely to snag on edges of an already-positioned stent graft 2 upon withdrawal after release of the stent graft 2. In this embodiment, the first body 1311a is cylindrical, and specifically, the first body 1311a is tapered cylindrical.
The second section 1312 is a cylindrical structure having a plurality of catching grooves 134, the catching grooves 134 are disposed opposite to the ribs 1311b, and the catching grooves 134 have openings at the distal end of the second section 1312 and the surface away from the axis of the second section 1312, and the catching grooves 134 are used for placing the barb structures 212 to prevent the barb structures from being exposed. The number of the locking grooves 134 is the same as the number of the barb structures 212, that is, the number of the locking grooves 134 is the same as the number of the ribs 1311b, the number of the barb structures 212, and the number of the wave crests of the stent ring 211.
The third section 1313 is cylindrical, the radial diameter of the third section 1313 is greater than or equal to the radial diameter of the second section 1312, and the radial diameter of the second section 1312 is the same as the maximum distance from the ribs 1311b to the axis, so that the third section 1313 is in close fit with the barb protective sleeves 132, and the stent delivery device is not prone to scratching the edges of the positioned stent graft when retracted after the stent graft is released.
Referring to fig. 4a-4b, the barb protective sleeve 132 is used to protect the barb structures 212 from exposure. The barb protective sleeve 132 is machined from a metallic material. The barb protection sleeve 132 comprises a barrel 1321 at the distal end and a screw 1322 with external threads at the proximal end, the distal end of the screw is connected with the proximal end of the barrel, the barrel has a chamber penetrating through the distal end face of the barrel, that is, the barrel 1321 has an opening at the distal end of the barb protection sleeve 132, and the barrel 1321 is sleeved on the outer side of the bare segment fixing member 131 and at least partially covers the bare segment fixing member 131, so that at least part of the bare segment fixing member 131 is arranged in the chamber, specifically, as shown in fig. 2, the barb protection sleeve covers the second segment, the third segment and the proximal end of the first end of the bare segment fixing member, so that the tapered part of the distal end of the first segment is exposed, and because the barrel 1321 is tightly matched with the bare segment fixing member 131, and the barrel 1321 tightly presses the bare segment 21 without slipping off and protects the barb structure 212 from being exposed, when the stent conveying device withdraws, a conical transition section is formed from the cylindrical part to the far end of the first end, so that blood vessels are prevented from being scraped, the stent conveying device withdraws more smoothly, or the stent conveying device is prevented from driving the stent graft to shift when being withdrawn, and the stent graft is released accurately. Barb protection sleeve 132 is connected to conical head 133 by threaded rod 1322. The distal end of first segment 1311 is disposed proximal to the distal end of cylindrical portion 1321 and the proximal end of third segment 1313 is disposed proximal to the proximal end of cylindrical portion 1321. In other embodiments, the cylindrical portion is sleeved outside the bare section fixing element and covers the bare section fixing element, so that the bare section fixing element is disposed in the cavity, that is, the barb protection sleeve covers the second section, the third section and the first end of the bare section fixing element.
At least one groove 1323 is provided on the outer side wall of the cylindrical portion 1321 along the axial direction of the cylindrical portion 1321, and the opening of the groove 1323 extends to both ends of the cylindrical portion 1321 in the axial direction. The recess 1323 is configured to provide an arrangement space for the embedded guide wire 14, so as to reduce the diameter of the outer tube of the stent delivery device 1, and to avoid the embedded guide wire 14 from affecting the diameter of the outer tube of the stent delivery device 1 when passing through the outer surface of the barb protection sleeve 132. The shape of the groove 1323 includes, but is not limited to, an arc.
With continued reference to fig. 2, the rear release assembly 13 also includes a conical head 133. The rear release assembly 13 has an internal bore 130 along its axis, the internal bore 130 extending axially through the bare segment fixture 131, the barb protection sleeve 132 and the conical head 133. The tapered head 133 is generally conical in shape, which allows the stent delivery device 1 to be easily advanced into a blood vessel. The conical head 133 is made of a polymer material. The distal end of the conical head 133 is a constant diameter section, the proximal end is conical, and the axial diameter of the proximal end of the conical head 133 is the smallest. The distal end of the conical head 133 has a concave groove through the distal end face with internal threads matching the external threads of the screw 1322, the screw 1322 being threaded into the concave groove of the conical head 133.
The stent delivery device 1 further comprises a handle assembly 11 and an outer tube assembly 12, wherein the handle assembly 11, the outer tube assembly 12 and a rear release assembly 13 are sequentially arranged from the far end to the near end along the axial direction. In detail, the proximal end of the handle assembly 11 is connected to the distal end of the outer tube assembly 12, and the proximal end of the outer tube assembly 12 is disposed at the distal end of the rear release assembly 13. The stent graft 2 is loaded onto the outer tube assembly 12 and the proximal end of the stent graft 2 is secured to the rear release assembly 13.
Referring to fig. 6a to 6e, the outer tube assembly 12 includes an outer tube 121 and an inner tube 122, the outer tube 121 is disposed on the outer side of the inner tube 122, and the inner tube 122 is used for loading the stent graft 2, i.e. the stent graft 2 is mounted on the inner tube 122. The outer tube 121 is disposed outside the inner tube 122 and is movable relative to the inner tube 122 and is used to cover the stent graft 2. A handle assembly 11 is attached to the distal end of the outer tube 121 and is used to control the advancement and retraction of the outer tube 121.
With reference to fig. 1, the stent delivery device 1 further includes a plurality of embedded guide wires 14, for example, the number of the embedded guide wires 14 is multiple, the distal ends of the embedded guide wires 14 pass through the outer tube assembly 2 and then are fixed on the handle assembly 11, the proximal ends of the embedded guide wires 14 extend to the proximal end of the stent delivery device 1 after passing through the covered stent 2 mounted on the stent delivery device 1, and the proximal ends of the embedded guide wires 14 extend out of the proximal end of the release assembly 13. Wherein, the length of the proximal end of the release component 13 after the embedded guide wire 14 extends out is at least 1.5 meters, so as to be led into the human body for standby. The pre-embedded guide wire 14 is used for guiding the branch guide wire to penetrate out of the windowing embedded branch 221 of the covered stent 2 into a branch blood vessel (such as a renal artery blood vessel), so that the branch stent can easily reach the branch blood vessel through the windowing embedded branch 221, and the delivery and the release of the branch stent are completed. The number of embedded wires 14 is the same as the number of windowed embedded branches 221.
The embodiment also provides a stent delivery system, which comprises a covered stent 2 and a stent delivery device 1, wherein the stent delivery device 1 is used for installing, delivering and releasing the covered stent 2 and is also used for delivering a guide device for assisting in opening the access of the branch stent.
The covered stent 2 comprises a naked section 21 and a covered section 22, the far end of the naked section 21 is connected with the near end of the covered section 22, the covered section 22 comprises a covered section stent and a covering film, and the covering film covers the covered section stent to isolate aneurysm from blood flow and enable the blood flow to flow through the inside of the covered stent 2. The bare section 21 comprises a support ring 211 and a plurality of barb structures 212, the support ring 211 is wavy, the support ring 211 is formed by connecting a plurality of wave bars end to end, the connecting points of two adjacent wave bars at the near end of the support ring 211 form wave crests, and the connecting points of two adjacent wave bars at the far end of the support ring 211 form wave troughs. A plurality of barb structures 212 are circumferentially uniformly disposed on the proximal peaks (engagement points) of the stent ring 211. The proximal end of the cover segment 22 has at least one fenestrated inset branch 221 to establish a blood flow passageway for the branched vessel. In the present embodiment, the stent graft 2 is a generally "herringbone" tubular structure, with the distal end of the stent graft 2 having ipsilateral and contralateral branches. The number of the windowing embedded branches 221 may be one or more, and the specific number thereof is adjusted according to the actual blood vessel condition. The same side is the side with the same entering direction of the conveying system, and the opposite side is the side opposite to the same side. In the present embodiment, the number of the windowing inline branches 221 is 2.
A spacing exists between the proximal end of each rib and the proximal end of the first body for suspending a peak of a support ring 811. The ribs 1311b are used for clamping the stent ring 811, that is, the proximal end of the stent ring 211 is suspended at the proximal ends of the ribs 1311b, in detail, two wave bars connected to form wave troughs are clamped between two adjacent ribs, two wave bars connected to form wave crests are arranged at two sides of the corresponding rib (that is, the rib suspending the proximal end of the stent ring 211), and the wave crests are located at the proximal end of the ribs 1311b, so that the wave crests are clamped on the ribs 1311b to prevent relative movement between the stent graft 2 and the bare segment fixing member 131.
Referring to fig. 5a-5c, the way in which the pre-embedded guidewire 14 passes through the stent graft 2 varies according to the orientation of the fenestrated embedded branch 221. Taking the fenestration of the double renal arteries as an example, the present embodiment includes two fenestrated embedded branches 221 and 221 ', so that the number of the pre-buried guide wires 14 is 2, which are the pre-buried guide wires 14 and the pre-buried guide wires 14', respectively. According to individual differences, the directions of the blood flow of the openings of the double renal arteries comprise a double upward direction, a double downward direction and a mode that one of the blood flow of the openings of the double renal arteries faces upwards and the other one of the blood flow of the openings of the double renal arteries faces downwards, and the modes that the pre-buried guide wires 14 and 14' pass through the covered stent 2 comprise the following 3 modes. As shown in FIG. 5a, if the direction of the blood flow of the double renal artery openings is in a double downward direction (i.e. the directions of the two stent graft fenestration embedded branches face the proximal end of the stent graft 2), the proximal end of the pre-buried guide wire 14 passes through the fenestration embedded branch 221 from the distal end outer cavity of the stent graft 2 into the proximal end inner cavity of the stent graft 2, then passes out of the proximal end inner cavity of the stent graft 2, and extends towards the proximal end of the stent delivery device 1; the proximal end of the pre-buried guide wire 14 'penetrates out of the proximal end inner cavity of the covered stent 2 from the distal end outer cavity of the covered stent 2 after penetrating into the proximal end inner cavity of the covered stent 2 from the windowing embedded branch 221', and extends towards the proximal end of the stent delivery device 1. As shown in FIG. 5b, if the direction of the blood flow of the renal artery openings is upward (i.e. the direction of the fenestrated embedded branch of the stent graft is toward the distal end of the stent graft 2) and downward (i.e. the direction of the fenestrated embedded branch of the stent graft is toward the proximal end of the stent graft 2), specifically, taking FIG. 5b as an example, the direction of the fenestrated embedded branch 221' is toward the distal end of the stent graft 2, and the direction of the fenestrated embedded branch 221 is toward the proximal end of the stent graft 2, the proximal end of the embedded guidewire 14 penetrates into the proximal end inner cavity of the stent graft 2 from the distal end outer cavity of the stent graft 2 through the fenestrated embedded branch 221, then penetrates out of the proximal end inner cavity of the stent graft 2, and extends toward the proximal end of the stent delivery device 1; the proximal end of the pre-buried guide wire 14 'penetrates into the distal inner cavity of the stent graft 2 from the opposite side branch 223 of the stent graft 2, penetrates out to the distal outer cavity of the stent graft 2 from the windowing embedded branch 221', and extends towards the proximal end of the stent delivery device 1. As shown in fig. 5c, if the direction of the blood flow of the opening of the double renal arteries is double upward (i.e. the direction of the fenestrated embedded branches of the two covered stents is towards the distal ends of the covered stents 2), the proximal ends of the pre-embedded guide wires 14 penetrate into the distal inner cavity of the covered stent 2 from the contralateral branch 223 of the covered stent 2, penetrate out to the distal outer cavity of the covered stent 2 from the fenestrated embedded branch 221, and extend towards the proximal end of the stent delivery device 1; the proximal end of the pre-buried guide wire 14 'penetrates into the distal inner cavity of the stent graft 2 from the opposite side branch 223 of the stent graft 2, penetrates out to the distal outer cavity of the stent graft 2 from the windowing embedded branch 221', and extends towards the proximal end of the stent delivery device 1.
Referring to fig. 6a-9, the stent delivery system further comprises a guiding device 3, the guiding device 3 comprising a multilumen tubing 31 and a branch guide member 32.
The multi-lumen tube 31 is a tubular structure having at least one lumen 311 disposed axially along the multi-lumen tube 31, each lumen 311 having openings at both the proximal and distal ends of the multi-lumen tube 31. The number of the inner cavities 311 is the same as that of the embedded guide wires 14, and each embedded guide wire 14 is arranged in one inner cavity 311 in the guiding process so as to avoid the phenomenon that the embedded guide wires 14 are mutually wound in a blood vessel, for example, the phenomenon that the embedded guide wires 14 are mutually wound between a plurality of embedded guide wires 14 in the process of penetrating into the blood vessel from a femoral artery and penetrating out of an axillary artery in an operation is avoided. The distal end of the multi-lumen tube 31 has a tapered recess 312, the tapered head 133 is tapered, the shape of the tapered recess 312 matches the shape of the tapered head 133, and the diameter of the tapered head 133 is larger than the diameter of the tapered recess 312, so that the distal end of the multi-lumen tube 31 can be arranged on the tapered head 133 through the interference fit of the tapered recess 312, so that the distal end of the multi-lumen tube 31 is tightly fitted with the tapered head 133. The multi-lumen tube 31 is made of a polymer material. The radial cross-section of the multi-lumen tube 31 may be circular (as shown in fig. 8 a), crescent-shaped (as shown in fig. 8 b) or dumbbell-shaped (as shown in fig. 8 c), and the radial cross-section of the lumen 311 may be circular, or may be other conventional shapes, which need only allow passage of a guide wire.
During the operation, with femoral artery and axillary artery opening simultaneously, multicavity pipe 31 gets into until femoral artery wears out by the axillary artery, penetrates pre-buried seal wire 14 from femoral artery in the inner chamber 311 of multicavity pipe 31, keeps many strong pipe 31 near-ends and conical head closely to simultaneously to axillary artery withdrawal multicavity pipe 31, until pre-buried seal wire 14 near-ends expose from the axillary artery. Specifically, the embedded guide wires extend from the proximal end of the stent to the proximal end of the stent delivery device 1, the multi-lumen tube 31 is tightly attached to the proximal end of the conical head (the conical head is arranged in an interference fit with the multi-lumen tube), the embedded guide wires extend from the proximal end of the stent delivery device 1 to extend out of the post-release assembly 13, the embedded guide wires 14 directly enter the multi-lumen tube 31, one embedded guide wire 14 is placed in each lumen 311, after the covered stent reaches a target position (abdominal aorta), the distal end of the multi-lumen tube 31 is separated from the proximal end of the conical head 133, and the proximal end of the embedded guide wires 14 follows the multi-lumen tube 31 to reach a preset position (for example, an axillary artery opening).
The branch guiding component 32 comprises a guiding sheath 321 and a guiding catheter 322, and the branch guiding component 32 is used for matching with the embedded guide wire 14 in the process that the branch guiding soft guide wire 43 enters the branch vessel so as to hyper-select the branch vessel and establish a branch stent channel. At this time, the stent delivery device 1 delivers the stent graft 2 into the abdominal aorta with the fenestrated embedded branch 221 of the stent graft 2 positioned near the opening of the branch vessel (e.g., the opening of the double renal arteries), and the stent graft 2 is in a semi-released state, i.e., the handle assembly 11 withdraws the outer tube 121, so that a portion of the stent graft 2 (i.e., the proximal end of the stent graft to the portion of the fenestrated embedded branch 221 of the stent graft) is released into the vascular environment to make room for the subsequent branch vessel to be over-selected. The guiding sheath 321 passes through the opening of the windowing embedded branch 221 under the guidance of the embedded guide wire 14; the guiding catheter 322 is movably disposed in the guiding sheath 321, and the proximal end of the guiding catheter 322 extends out of the guiding sheath 321 to the opening (i.e. the predetermined position) of the branch vessel, and the guiding catheter 322 is used for passing through the branch guide wire and establishing the passage of the branch stent. Wherein, the branch guide wire comprises a branch guide soft guide wire 43 and a guide hard guide wire 43'.
In the present embodiment, the branch guide member 32 includes a guide sheath 321 and a guide catheter 322. The specific matching mode of the branch guide part 32, the embedded guide wire and the branch guide wire is as follows: when the opening blood flow of the branch blood vessel is downward (i.e. the embedded branch direction of the fenestration of the covered stent is toward the proximal end of the covered stent 2), the distal end of the embedded guide wire 14 is fixed on the handle assembly 11, the proximal end of the embedded guide wire 14 extends to a preset position (for example, an axillary artery opening), and after the guiding sheath 321 is introduced from the proximal end of the embedded guide wire 14, the guiding sheath passes through the gap of the stent ring 221 of the bare section 21 along the embedded guide wire 14, enters the proximal end inner cavity of the covered stent 2, and passes through the opening of the fenestration embedded branch 221 (as shown in fig. 6 a); then, the guiding catheter 322 is guided in parallel with the embedded guide wire 14 from the proximal end of the embedded guide wire, and is disposed in the guiding sheath 321, and the proximal end of the guiding catheter 322 extends out of the guiding sheath 321 to a predetermined position (i.e. the opening of the branch blood vessel) (as shown in fig. 6 b); next, the proximal end of the branch guiding soft guide wire 43 enters from the proximal end of the guiding catheter 322 and extends into the branch vessel from the distal end of the guiding catheter 322 (as shown in fig. 6 c); then, the guiding catheter 322 extends along the branch guiding soft wire 43 into the branch vessel (as shown in fig. 6 d); next, the branch guiding soft wire 43 is replaced with a guiding hard wire 43 ', the guiding catheter 322 is removed, the pre-embedded wire 14 is pulled out, and the guiding sheath 321 follows the branch blood vessel along the guiding hard wire 43' to establish a branch stent passage (as shown in fig. 6e, refer to fig. 6d at the same time), so as to complete the over-selection.
As shown in fig. 7, when the opening of the branch vessel is upward (i.e., the embedded branch direction of the fenestration of the stent graft is toward the distal end of the stent graft 2), the distal end of the embedded guide wire 14 is fixed on the handle assembly 11, the proximal end of the embedded guide wire 14 extends to a preset position (for example, an axillary artery opening), the distal end of the embedded guide wire 14 is pulled into the opposite side branch 223 of the stent graft 2, and the embedded guide wire is grabbed out to the other side femoral artery opening by the grabber to establish a "new embedded guide wire channel"; then, the guiding sheath 321 is led in from the distal end of the embedded guide wire 14, passes through the opposite side branch 223 along the embedded guide wire 14, and passes out of the opening of the fenestration embedded branch 221 of the covered stent; the guiding catheter 322 is arranged in the guiding sheath 321 after being guided in parallel with the embedded guide wire 14 from the distal end of the embedded guide wire 14, and the proximal end of the guiding catheter 322 extends out of the opening of the guiding sheath 321 to a predetermined position (i.e. the opening of the branch vessel); the proximal end of the branch guide soft guide wire 43 enters from the distal end of the guide catheter 322 and extends into a branch vessel from the proximal end of the guide catheter 322; then, the guiding catheter 322 extends into the branch vessel along the branch guiding soft guide wire 43; then, the branch guide soft guide wire 43 is replaced with a guide hard guide wire 43 ', the guide catheter 322 is removed, the embedded guide wire 14 is pulled out, the guide sheath 321 follows the branch blood vessel along the guide hard guide wire 43', and a branch stent passage is established to complete the over-selection.
In summary, according to the stent delivery device and the stent delivery system provided by the invention, the proximal end of the bare section is clamped by the bare section fixing piece of the rear release assembly, the proximal end of the bare section is protected and fixed by the barb protective sleeve to avoid leakage, the stent delivery device is prevented from being difficult to scratch the edge of the positioned covered stent when being withdrawn after releasing the covered stent, and the displacement of the covered stent during releasing is also avoided, so that the precise release of the covered stent is realized, and the barb of the stent delivery system during the operation is prevented from scratching blood vessels when the renal artery is over-selected; the stent conveying system is provided with a corresponding mode that the embedded guide wire passes through the covered stent according to the orientation of the windowed embedded branch opening and different over-selection modes according to the orientation of the windowed embedded branch opening, so that the problem that the branch guide wire is difficult to enter a branch vessel is solved; still include at least one inner chamber through the multi-chamber pipe, every pre-buried seal wire is arranged in an inner chamber to avoid a plurality of pre-buried seal wires of leading to take place the phenomenon of intertwine in the blood vessel, thereby guaranteed the security and the high efficiency of operation.
In addition, unless otherwise specified or indicated, the terms "first", "second", "third", and the like in the specification are used only for distinguishing various components, elements, steps, and the like in the specification, and are not used for indicating logical relationships or sequential relationships among the various components, elements, steps, and the like.
It is to be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, it is not intended to limit the invention to those embodiments. It will be apparent to those skilled in the art from this disclosure that many changes and modifications can be made, or equivalents modified, in the embodiments of the invention without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention, unless the technical essence of the present invention is not departed from the content of the technical solution of the present invention.
Claims (14)
1. A stent conveying device is characterized by comprising a rear release assembly, wherein the rear release assembly comprises a naked section fixing piece and a barb protective sleeve, the naked section fixing piece sequentially comprises a first section, a second section and a third section from a far end to a near end along the axial direction of the naked section fixing piece, the first section is used for compressing and fixing the near end of a stent ring of the naked section of a covered stent, the first section comprises a first main body and a plurality of ridges uniformly distributed along the circumferential direction of the first main body, the second section is provided with a plurality of clamping grooves, each clamping groove is opposite to one ridge, the clamping grooves are used for placing barb structures of the naked section and preventing the barb structures from being exposed, and the number of the clamping grooves is the same as that of the barb structures;
the barb protective sleeve is arranged on the outer side of the bare section fixing piece from the near end of the bare section fixing piece and at least partially covers the bare section fixing piece, and the barb protective sleeve is used for protecting the barb structure so as to enable the barb structure not to be exposed;
the barb protection sleeve comprises a cylindrical part and a screw rod, the cylindrical part is positioned at the proximal end, the screw rod is positioned at the distal end, the cylindrical part is provided with an opening at the distal end of the barb protection sleeve, and the proximal end of the cylindrical part is connected with the distal end of the screw rod;
the outer side wall of the cylindrical part is provided with at least one groove which is axially arranged along the cylindrical part, the opening of the groove axially extends to two ends of the cylindrical part, and the groove is used for providing a distribution space for the embedded guide wire.
2. The stent delivery device of claim 1, wherein the barb protective sheath covers the proximal ends of the second, third, and first segments of the bare segment fastener.
3. The stent delivery device of claim 2, wherein the ribs are adapted to capture the proximal end of the stent ring, each rib having an axial direction that is the same as the axial direction of the first body.
4. The stent delivery device of claim 3, wherein a spacing exists between the proximal end of each rib and the proximal end of the first body, the spacing configured to receive the proximal end of the stent ring.
5. The stent delivery device of claim 3, wherein the distal end of the first segment is tapered and the distal ends of the plurality of ribs have chamfered surfaces with the same taper as the distal end of the first segment.
6. The stent delivery device of claim 1, wherein the barrel has a cavity through a distal end face of the barrel, at least a portion of the bare segment securing element being disposed in the cavity, and wherein the distal end of the first segment is disposed proximate the distal end of the barrel and the proximal end of the third segment is disposed proximate the proximal end of the barrel.
7. The stent delivery device of claim 6, wherein the rear release assembly further comprises a conical head, the barb protective sleeve being connected to the conical head by the threaded rod.
8. The stent delivery device according to claim 1, further comprising a handle assembly, an outer tube assembly and a pre-buried guide wire, wherein the proximal end of the handle assembly is connected with the distal end of the outer tube assembly, the proximal end of the outer tube assembly is arranged at the distal end of the rear release assembly, the outer tube assembly is used for loading the stent graft, the distal end of the pre-buried guide wire penetrates through the outer tube assembly and then is fixed on the handle assembly, the proximal end of the pre-buried guide wire extends to the proximal end after passing through the stent graft mounted on the stent delivery device, the proximal end of the pre-buried guide wire extends out of the proximal end of the rear release assembly, and the pre-buried guide wire is used for guiding the branched guide wire to penetrate out of the inner cavity of the stent graft from the windowed embedded branch of the stent graft.
9. A stent delivery system, comprising the stent delivery device of any one of claims 1 to 8, and further comprising a stent graft, wherein the stent graft comprises a bare section, the bare section is arranged at the proximal end of the stent graft, the bare section comprises a stent ring and a barb structure, the barb structure is arranged at the proximal end of the stent ring, and the proximal end of the stent ring is clamped on the plurality of ribs.
10. The stent delivery system of claim 9,
the support ring is formed by connecting a plurality of wave bars end to end, the connecting points positioned at the near end of the support ring form wave crests, and the connecting points positioned at the far end of the support ring form wave troughs; and
the distance exists between the near end part of each ridge and the near end part of the first main body, the two wave rods which are connected to form the wave troughs are clamped between the two adjacent ridges, the two wave rods which are connected to form the wave crests are respectively arranged on two sides of the corresponding ridge, and the wave crests are arranged in the distance.
11. The stent delivery system of claim 9, wherein the stent graft further comprises a stent graft segment, wherein the distal end of the bare segment is connected to the proximal end of the stent graft segment, and wherein the stent graft segment has at least one fenestrated embedded branch, each fenestrated embedded branch being configured to establish access to a branch vessel directly opposite thereto, and wherein the distal end of the stent graft segment comprises an ipsilateral branch and a contralateral branch.
12. The stent delivery system of claim 11, wherein the passing of the proximal end of the pre-buried guidewire through the stent graft comprises:
when the direction of the windowing embedded branch faces the far end of the covered stent, the near end of the embedded guide wire penetrates into the far-end inner cavity of the covered stent from the opposite side branch, penetrates out of the windowing embedded branch to the far-end outer cavity of the covered stent and extends towards the near end of the stent conveying device; and/or
When the direction of the windowing embedded branch faces the near end of the covered stent, the near end of the embedded guide wire penetrates into the near end inner cavity of the covered stent from the far end outer cavity of the covered stent through the windowing embedded branch, then penetrates out of the near end inner cavity of the covered stent, and extends towards the near end of the stent conveying device.
13. The stent delivery system of claim 12, further comprising a guiding device, wherein the guiding device comprises a multi-lumen tube, wherein the rear release assembly further comprises a conical head, wherein a distal end of the multi-lumen tube is attached to a proximal end of the conical head, wherein the multi-lumen tube has at least one lumen axially disposed along the multi-lumen tube, and wherein each lumen is used for placement of one of the pre-embedded guidewires;
the number of the inner cavities and the number of the embedded guide wires are the same as the number of the windowing embedded branches.
14. The stent delivery system of claim 12, further comprising a guide device, the guide device comprising a branch guide component, the branch guide component comprising a guide sheath and a guide catheter, the guide sheath passing through the fenestrated branch-in opening under guidance of the pre-embedded guidewire; the guiding catheter is movably arranged in the guiding sheath, the near end of the guiding catheter extends out of the guiding sheath to a preset position, and the guiding catheter is used for passing through the branch guide wire and establishing a passage of the branch support.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210097111.3A CN114098883B (en) | 2022-01-27 | 2022-01-27 | Support conveying device and support conveying system |
| PCT/CN2023/070668 WO2023142942A1 (en) | 2022-01-27 | 2023-01-05 | Stent conveying device and stent conveying system |
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| CN202210097111.3A CN114098883B (en) | 2022-01-27 | 2022-01-27 | Support conveying device and support conveying system |
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| CN114098883A CN114098883A (en) | 2022-03-01 |
| CN114098883B true CN114098883B (en) | 2022-06-17 |
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| CN202210097111.3A Active CN114098883B (en) | 2022-01-27 | 2022-01-27 | Support conveying device and support conveying system |
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| WO (1) | WO2023142942A1 (en) |
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| 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 |
| CN114652495B (en) * | 2022-05-18 | 2022-08-30 | 上海微创心脉医疗科技(集团)股份有限公司 | Covered stent |
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| JP2010540108A (en) * | 2007-09-26 | 2010-12-24 | トリバスキュラー・インコーポレイテッド | Stent deployment apparatus and method |
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| US7147661B2 (en) * | 2001-12-20 | 2006-12-12 | Boston Scientific Santa Rosa Corp. | Radially expandable stent |
| WO2005099627A1 (en) * | 2004-04-12 | 2005-10-27 | Cook Incorporated | Stent graft repair device |
| CN2762776Y (en) * | 2004-12-30 | 2006-03-08 | 深圳市先健科技股份有限公司 | Reversely-released aorta coated stand transfer system |
| US20090264985A1 (en) * | 2008-04-17 | 2009-10-22 | Medtronic Vascular, Inc. | Branch Vessel Suture Stent System and Method |
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| CN203619729U (en) * | 2013-12-17 | 2014-06-04 | 微创心脉医疗科技（上海）有限公司 | Stent conveying system and rear release component thereof |
| CN105943211A (en) * | 2015-12-23 | 2016-09-21 | 微创心脉医疗科技（上海）有限公司 | Stent delivering system and back releasing assembly thereof |
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| CN108261251B (en) * | 2016-12-30 | 2020-07-21 | 先健科技(深圳)有限公司 | Lumen stent and conveying system thereof |
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| 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 |
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| JP2010540108A (en) * | 2007-09-26 | 2010-12-24 | トリバスキュラー・インコーポレイテッド | Stent deployment apparatus and method |
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| WO2023142942A1 (en) | 2023-08-03 |
| CN114098883A (en) | 2022-03-01 |
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