CN116549194A - Conveying system support beam-contracting mechanism and abdominal aortic tectorial membrane support conveying system - Google Patents
Conveying system support beam-contracting mechanism and abdominal aortic tectorial membrane support conveying system Download PDFInfo
- Publication number
- CN116549194A CN116549194A CN202310825635.4A CN202310825635A CN116549194A CN 116549194 A CN116549194 A CN 116549194A CN 202310825635 A CN202310825635 A CN 202310825635A CN 116549194 A CN116549194 A CN 116549194A
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- Prior art keywords
- sliding
- sleeve
- proximal end
- tube
- clamping seat
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- 230000003187 abdominal effect Effects 0.000 title claims description 19
- 210000002489 tectorial membrane Anatomy 0.000 title description 9
- 210000000078 claw Anatomy 0.000 claims abstract description 58
- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 230000001681 protective effect Effects 0.000 claims description 35
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 abstract description 11
- 210000004204 blood vessel Anatomy 0.000 abstract description 10
- 210000003128 head Anatomy 0.000 description 8
- 210000000702 aorta abdominal Anatomy 0.000 description 6
- 208000002223 abdominal aortic aneurysm Diseases 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 208000007474 aortic aneurysm Diseases 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002792 vascular Effects 0.000 description 2
- 208000025494 Aortic disease Diseases 0.000 description 1
- 206010070627 Tumour rupture Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002980 postoperative effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Classifications
-
- 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
- A61F2/9522—Means for mounting a stent or stent-graft onto or into a placement instrument
-
- 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
- A61B17/12027—Type of occlusion
- A61B17/12031—Type of occlusion complete occlusion
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2002/823—Stents, different from stent-grafts, adapted to cover an aneurysm
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The invention discloses a stent-graft stent delivery system and a stent-graft stent delivery system, comprising a clamping seat, a positioning sleeve and a pressing claw sleeve, wherein the clamping seat is connected to the proximal end of a central tube, a limiting convex ring is arranged at the distal end of the clamping seat, a plurality of clamping protrusions which are uniformly distributed are arranged on the outer circumferential surface of the limiting convex ring and used for sleeving and clamping connecting pieces on a bare stent section, the positioning sleeve is sleeved outside the clamping seat and positioned at one side of the proximal end of the limiting convex ring, the positioning sleeve is circumferentially and fixedly connected with the clamping seat in a relative manner, a plurality of limiting grooves which are axially and one by one correspond to the clamping protrusions are arranged on the outer circumferential surface of the positioning sleeve, the pressing claw sleeve is sleeved on the central tube and positioned at one side of the distal end of the clamping seat, and the pressing claw sleeve is arranged at the outer circumference of the pressing claw corresponding to the limiting grooves and extends to one side of the proximal end and is used for penetrating through the proximal end of the bare stent section to press the proximal end downwards and bundle the bare stent section and then extend into the limiting grooves. The invention can avoid damaging the outer sheath tube in the assembly process and the blood vessel in the release process.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a stent converging mechanism of a conveying system and an abdominal aortic tectorial membrane stent conveying system.
Background
Abdominal Aortic Aneurysm (AAA) is a common aortic disease, epidemiological studies have shown that the incidence of men in the population over 50 years old is 3.9-7.2%, women are 1.0-1.3%, the incidence increases by 4% every 10 years old after 55 years old, the incidence increases to 10% in patients 80 years old and older, and the risk of tumor rupture in patients 80 years old and older is higher than in other populations. The main current methods for treating abdominal aortic aneurysms include traditional open surgery and abdominal aortic aneurysm endovascular prostheses. The abdominal aortic endoluminal prosthesis (EVAR) has been developed rapidly within 20 years due to the advantages of small trauma, short operation and hospitalization time, rapid postoperative recovery, low mortality rate during operation, low incidence of complications, etc.
In performing an abdominal aortic endoluminal prosthesis, a stent graft is implanted within the abdominal aorta. The abdominal aorta tectorial membrane stent needs to be conveyed into a blood vessel through a conveying system, when the stent is installed through the conveying system, the outer sheath is easy to damage due to the existence of the bare segment barb in the tectorial membrane stent, and the blood vessel wall is easy to damage due to the existence of the bare segment barb in the tectorial membrane stent in the stent releasing process. Therefore, there is a need to design a delivery system to avoid damage to the sheath and vessel.
Disclosure of Invention
The invention aims to provide a stent converging mechanism of a conveying system and an abdominal aortic stent-graft conveying system, which are used for solving the problems in the prior art, and avoiding damage to an outer sheath tube in the assembly process and damage to a blood vessel in the release process.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a conveying system bracket converging mechanism and an abdominal aorta tectorial membrane bracket conveying system, which comprises a clamping seat, a positioning sleeve and a pressing claw sleeve, wherein the clamping seat is connected to the proximal end of a central tube, a limiting convex ring is arranged at the distal end of the clamping seat, a plurality of clamping convex rings which are uniformly distributed are arranged on the outer circumferential surface of the limiting convex ring and used for sleeving connecting pieces on a bare bracket section, the positioning sleeve is sleeved outside the clamping seat and is positioned at one side of the proximal end of the limiting convex ring, the positioning sleeve is in circumferential relative fixed connection with the clamping seat, a plurality of limiting grooves which are axially and one by one corresponding to the clamping convex rings are arranged on the outer circumferential surface of the positioning sleeve, the pressing claw sleeve is sleeved on the central tube and positioned at one side of the distal end of the clamping seat, and pressing claws which are corresponding to the limiting grooves are arranged on the outer circumference of the pressing claw sleeve, and are arranged to extend towards one side of the proximal end and are used for downwards converging the proximal end of the bare bracket section through the proximal end and then extend into the limiting grooves.
Preferably, the limiting collar is capable of axially limiting the positioning sleeve against distal movement.
Preferably, the proximal end of the clamping seat is provided with a first external thread for being in threaded connection with a conical head at the proximal end of the central tube, and the conical head is in threaded connection with the proximal end of the clamping seat so as to tightly press the positioning sleeve on the limiting convex ring.
Preferably, the outer peripheral surface of the proximal end of the clamping seat is provided with two limiting planes which are oppositely arranged, and the positioning sleeve is slidably sleeved at the proximal end of the clamping seat and is relatively fixed with the clamping seat in the circumferential direction through the two limiting planes.
Preferably, a gap for the bare section of the bracket to pass through is arranged between two adjacent pressing claws.
The invention also provides an abdominal aorta tectorial membrane stent conveying system, which comprises the conveying system stent converging mechanism, a central tube, a single-cavity tube, a jacking tube and an outer sheath tube, wherein the jacking tube is sleeved outside the central tube, the proximal end of the central tube passes through the jacking tube and the clamping seat and then is connected with the conical head, and the distal end of the central tube is fixedly connected with the protective shell; the proximal end of the jacking pipe is connected with the pressing claw sleeve, the distal end of the jacking pipe is connected with a pressing claw release mechanism, the pressing claw release mechanism is connected to the protective shell, and the jacking pipe can be pulled to the distal end through the pressing claw release mechanism; the push pipe moves to the far end to drive the pressure claw sleeve to be far away from the clamping seat so as to release the near end of the bare section of the bracket; the single-cavity pipe is sleeved outside the jacking pipe, and the distal end of the single-cavity pipe is fixedly connected to the protective shell; the sheath tube is sleeved outside the single-cavity tube, the pressing claw sleeve, the clamping seat and the positioning sleeve, the distal end of the sheath tube is connected with a sheath tube release mechanism, the sheath tube release mechanism is connected to the protective shell, the sheath tube can move to the distal end through the sheath tube release mechanism, and the sheath tube can move to the distal end to release the stent.
Preferably, a convex ring is arranged at the proximal end of the jacking pipe, the convex ring is arranged on an annular step in the pressing claw sleeve, and under the cooperation of the convex ring and the annular step, the distal movement of the jacking pipe can drive the pressing claw sleeve to synchronously move towards the distal end.
Preferably, the press claw release mechanism comprises a release shell and a top pipe sleeve, the release shell is sleeved on the protective shell, a first sliding groove extending in the circumferential direction and a second sliding groove extending in the axial direction are arranged on the protective shell, the first sliding groove is communicated with the proximal end of the second sliding groove, a sliding block is fixedly arranged in the release shell, the sliding block can slide into the second sliding groove from the first sliding groove, when the sliding block slides into the first sliding groove, the axial position of the release shell is unchanged, when the sliding block slides into the second sliding groove, the release shell can move along the second sliding groove to the distal end, an annular limiting groove is arranged in the release shell, the top pipe sleeve is fixedly sleeved on the distal end of the top pipe sleeve, a limiting block penetrating through the second sliding groove and extending into the annular limiting groove is fixedly arranged on the top pipe sleeve, the limiting block can move relatively in the circumferential direction in the annular limiting groove, the limiting block and the annular limiting groove are axially fixed relatively, and when the release shell slides into the second sliding groove, the release shell can move along the second sliding groove to the distal end through the annular limiting groove and the distal end.
Preferably, the sheath releasing mechanism comprises a fixed holding part and a sliding component, the fixed holding part is fixedly sleeved at the proximal end of the protective shell, a section of the outer peripheral surface of the protective shell, which is close to the fixed holding part, is provided with a second external thread, and is provided with an axially extending chute; an outer sleeve is fixedly sleeved on the outer wall of the far end of the outer sheath tube, an anti-rotation block is fixedly arranged on the outer wall of the outer sleeve, and the anti-rotation block is arranged in the sliding groove in a sliding manner;
the sliding assembly comprises a sliding shell, a sliding sleeve, a sliding tail cover, a spring, a sliding plate, a pressing sleeve and a sliding button, wherein the sliding sleeve is sleeved outside the protective shell, a first through hole is formed in the side wall of the sliding sleeve, the pressing sleeve is sleeved outside the sliding sleeve, the pressing sleeve is in axial relative sliding connection with the sliding sleeve, the circumferential relative fixed connection is performed, a second through hole is formed in the side wall of the pressing sleeve, the sliding tail cover is sleeved outside the protective shell and is fixedly connected with one end of the sliding sleeve, the sliding plate is rotatably connected onto the outer side wall of the sliding sleeve through a rotating shaft, the sliding plates on two sides of the rotating shaft are respectively provided with a first end and a second end, the first end and the second end respectively correspond to the first through hole and the second through hole, and sliding teeth are arranged on the inner side surface of the first end; the spring is sleeved outside the sliding sleeve, two ends of the spring respectively prop against the sliding tail cover and the pressing sleeve, the spring is in a compressed state, the pressing sleeve is pressed by the spring to enable the pressing sleeve to radially inwards press the first end, the first end enables the sliding teeth to be meshed with the second external threads through the first through hole, and meanwhile the second end stretches into the second through hole; the sliding shell is sleeved outside the pressing sleeve, the spring and the sliding tail cover, a sliding hole is formed in the sliding shell, the sliding button penetrates through the sliding hole and is fixedly connected with the pressing sleeve, when the sliding button is pushed to compress the spring, the pressing sleeve radially inwards extrudes the second end to enable the sliding teeth to be disengaged from the second external threads, a circle of rotating groove is formed in the sliding shell, and the anti-rotation block penetrates through the sliding groove and stretches into the rotating groove and can relatively rotate in the rotating groove.
Preferably, the medical device further comprises a reinforcing tube, wherein the reinforcing tube is sleeved outside the single-cavity tube, the reinforcing tube is arranged in the outer sheath tube, and the distal end of the reinforcing tube penetrates through the outer sheath tube to extend to the distal end of the single-cavity tube and is fixedly connected with the protective shell.
Compared with the prior art, the invention has the following technical effects:
according to the stent constriction mechanism of the conveying system and the abdominal aorta tectorial stent conveying system, the compression claws penetrate through the proximal end of the bare stent section to press down and constrict the proximal end of the bare stent section, the connecting piece at the proximal end of the bare stent section is sleeved into the clamping boss on the clamping seat, and circumferential restraint is carried out on the bare stent section through the clamping boss, so that the barbs at the proximal end of the bare stent section can be constricted inwards on the limiting convex ring and restrained in the circumferential direction, the situation that the barbs scratch or puncture the outer sheath tube when the outer sheath tube is installed is avoided, the stability of the bare stent section in the conveying process is ensured, and in addition, when the outer sheath tube is released, the barbs at the proximal end of the bare stent section are still in a constriction state, the vessel wall is not scratched due to the fact that the outer sheath tube is lost, the barb structure scratches the vessel wall is avoided, and the vessel inner wall is protected.
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 embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a conveying system bracket beam-converging mechanism provided by the invention;
fig. 2 is a schematic structural diagram of a conveying system bracket converging mechanism and a conical head after being connected;
FIG. 3 is a schematic diagram of a connection structure of a card holder and a positioning sleeve according to the present invention;
FIG. 4 is a schematic view of the structure of the medium pressure jaw case of the present invention;
FIG. 5 is a schematic view of the positioning sleeve according to the present invention;
FIG. 6 is a schematic diagram of a card holder according to the present invention;
figure 7 is a schematic illustration of the barb unit structure of the bare stent section of the present invention;
fig. 8 is a schematic structural view of an abdominal aortic stent graft delivery system provided by the present invention;
fig. 9 is a schematic diagram of a front view structure of an abdominal aortic stent-graft delivery system provided by the present invention;
FIG. 10 is a schematic side view of the abdominal aortic stent graft delivery system provided by the present invention;
FIG. 11 is a schematic cross-sectional view of the portion III of FIG. 10;
FIG. 12 is a schematic view of the connection structure of the release shell, the protective shell and the stopper according to the present invention;
FIG. 13 is a schematic cross-sectional view of the structure A-A of FIG. 10;
FIG. 14 is a schematic view of the structure of section I of FIG. 9;
FIG. 15 is a schematic view of the portion II of FIG. 10;
FIG. 16 is a schematic cross-sectional view of section I of FIG. 9;
FIG. 17 is a side view of the slide assembly of the present invention with the slide housing removed;
FIG. 18 is a cross-sectional view B-B of the slide assembly of FIG. 17 with the slide housing removed;
FIG. 19 is an exploded view of the slide assembly of the present invention with the slide housing removed;
FIG. 20 is a schematic view of the operation of the present invention when the rotating slide housing slowly releases the bracket;
FIG. 21 is a schematic view of the operation of the present invention when the bracket is released quickly by sliding the button;
in the figure: 1-cassette, 2-positioning sleeve, 3-pressure jaw sleeve, 4-center tube, 5-spacing collar, 6-snap-in, 7-spacing groove, 8-pressure jaw, 9-first external thread, 10-conical head, 11-spacing flat, 12-gap, 13-single lumen, 14-top tube, 15-outer sheath, 16-protective shell, 17-pressure jaw release mechanism, 18-sheath release mechanism, 19-collar, 20-annular step, 21-release shell, 22-top sleeve, 23-first runner, 24-second runner, 25-sliding block, 26-annular spacing groove, 27-stopper, 28-fixed grip, 29-sliding assembly, 30-second external thread, 31-runner, 32-outer sleeve, 33-anti-rotation block, 34-sliding shell, 35-sliding sleeve, 36-sliding tail cap, 37-spring, 38-sliding plate, 39-pressure sleeve, 40-sliding button, 41-first through hole, 42-second through hole, 43-first end, 44-second root, 45-second end, 45-barb, 46-sliding hole, 48-barb, dual barb, 48-barb, and dual barb release hole.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
The invention aims to provide a stent converging mechanism of a conveying system and an abdominal aortic tectorial stent conveying system, which are used for solving the problems in the prior art, avoiding damaging an outer sheath tube in the assembly process and avoiding damaging a blood vessel in the release process.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1-11, this embodiment provides a beam-shrinking mechanism of a conveying system support, including a clamping seat 1, a positioning sleeve 2 and a pressing claw sleeve 3, the clamping seat 1 is connected at the proximal end of a central tube 4, a limiting convex ring 5 is arranged at the distal end of the clamping seat 1, a plurality of clamping convex rings 6 uniformly distributed are arranged on the outer circumferential surface of the limiting convex ring 5, and are used for sleeving and clamping a connector at the proximal end of a bare section of the support, the positioning sleeve 2 is sleeved outside the clamping seat 1 and is positioned at one side of the proximal end of the limiting convex ring 5, the positioning sleeve 2 is fixedly connected with the clamping seat 1 in a circumferential direction relatively, a plurality of limiting grooves 7 axially corresponding to the clamping convex rings 6 are arranged on the outer circumferential surface of the positioning sleeve 2, the pressing claw sleeve 3 is sleeved on one side of the central tube 4 and positioned at the distal end of the clamping seat 1, pressing claws 8 corresponding to the limiting grooves 7 are arranged at the outer circumference of the pressing claw sleeve 3, and are arranged at one side of the proximal end of each pressing claw 8, and are used for penetrating through the proximal end of the bare section of the support to press down the proximal end of the bare section and then stretching into the limiting grooves 7.
The proximal end of the bare segment is pressed downwards and bunched by penetrating through the proximal end of the bare segment of the stent through each pressing claw 8, the connecting piece of the proximal end of the bare segment of the stent is sleeved into the clamping protrusion 6 on the clamping seat 1, the bare segment of the stent is circumferentially restrained through the clamping protrusion 6, thus barbs at the proximal end of the bare segment of the stent can be bunched inwards on the limiting convex ring 5 and restrained in the circumferential direction, the situation that the barbs scratch or puncture the sheath tube 15 when the sheath tube 15 is installed is avoided, the stability of the bare segment of the stent in the conveying process is ensured, in addition, when the sheath tube 15 is released, the barbs at the proximal end of the bare segment of the stent are still in a bunched state, the vessel wall is not scratched due to the fact that the restraint of the sheath tube 15 is lost, the vascular wall is prevented from being scratched by a barb structure, and the inner wall of the vessel is protected.
The apexes of the proximal ends of the bare sections of the abdominal aortic stent graft, which are matched with the conveying system of the abdominal aortic stent graft, are provided with barb structure units, as shown in figure 21, the barb structure units are used for being pricked into blood vessels to anchor the stent, the apexes of the proximal ends of the bare sections are respectively provided with a rear release hole 50 (namely a proximal end connecting piece of the bare sections of the stent) which is used for being matched with the clamping convex 6 and sleeved on the clamping convex 6, so that the abdominal aortic stent graft is fixed on the conveying system, the bare sections of the rear release holes 50 along the axial far end are provided with double barbs 49 or a plurality of barbs, and the double barbs 49 or a plurality of barbs are converged and connected with the root 48 of the same barb; the corresponding relation between the clamping convex 6 and the pressing claw 8 on the delivery system stent converging mechanism is consistent with the corresponding relation between the rear release hole 50 of the bare segment of the abdominal aorta covered stent and the barb root 48, so that the pressing claw 8 can stably press the barb root 48, the effect that one pressing claw 8 can press and bundle double barbs 49 or a plurality of barbs is achieved, and the damage to the blood vessel wall caused by the exposure of the tips of the double barbs 49 or the plurality of barbs under the same pressing claw 8 is avoided.
In this embodiment, the limiting collar 5 can axially limit the positioning sleeve 2 to prevent the positioning sleeve from moving distally.
In this embodiment, the proximal end of the clamping seat 1 is provided with a first external thread 9, which is used for being in threaded connection with a conical head 10 at the proximal end of the central tube 4, and the conical head 10 is in threaded connection with the proximal end of the clamping seat 1, so that the positioning sleeve 2 can be pressed on the limiting convex ring 5, and the axial positions of the positioning sleeve 2 and the clamping seat 1 are relatively fixed.
In this embodiment, the outer peripheral surface of the proximal end of the card holder 1 is provided with two limiting planes 11 which are oppositely arranged, and the positioning sleeve 2 is slidably sleeved on the proximal end of the card holder 1 and is fixed relative to the circumferential direction of the card holder 1 through the two limiting planes 11.
In this embodiment, a gap 12 is provided between two adjacent pressing claws 8 for the bare stent section to pass through. After the pressing claw 8 passes through the vertex of the proximal end of the bare segment of the bracket, the metal wires of the bare segment at the two sides of the vertex respectively pass through the gaps 12 at the two sides of the pressing claw 8.
Example two
As shown in fig. 1-21, the present embodiment provides an abdominal aortic tectorial membrane stent delivery system, which comprises the above-mentioned stent-graft retraction mechanism of the delivery system, and further comprises a central tube 4, a single-lumen tube 13, a jacking tube 14 and an outer sheath tube 15, wherein a jacking tube sleeve 22 is arranged outside the central tube 4, a proximal end of the central tube 4 passes through the jacking tube 14 and the clamping seat 1 and then is connected with a conical head 10, and a distal end of the central tube 4 is fixedly connected with a protective shell 16; the proximal end of the jacking pipe 14 is connected with the pressing claw sleeve 3, the distal end of the jacking pipe 14 is connected with the pressing claw release mechanism 17, the pressing claw release mechanism 17 is connected to the protective shell 16, and the jacking pipe 14 can be pulled towards the distal end through the pressing claw release mechanism 17; distal movement of the push tube 14 can drive the jaw sleeve 3 away from the cartridge 1 to release the proximal end of the bare stent segment; the single-cavity tube 13 is sleeved outside the jacking tube 14, and the distal end of the single-cavity tube 13 is fixedly connected to the protective shell 16; the outer sheath 15 is sleeved outside the single-cavity tube, the pressing claw sleeve 3, the clamping seat 1 and the positioning sleeve 2, the distal end of the outer sheath 15 is connected with the sheath release mechanism 18, the sheath release mechanism 18 is connected to the protective shell 16, the outer sheath 15 can be moved to the distal end through the sheath release mechanism 18, and the outer sheath 15 can be moved to the distal end to release the stent.
After the stent is conveyed into a blood vessel through a conveying system, the outer sheath tube 15 is moved to the distal end through the sheath tube release mechanism 18, the stent is released after the outer sheath tube 15 is moved to the distal end, at the moment, barbs at the proximal end of the bare segment of the stent are still in a converging state under the action of the pressing claws 8, the blood vessel wall cannot be scratched due to the fact that the constraints of the outer sheath tube 15 are lost, the vascular wall is prevented from being scratched by the barb structure, and the inner wall of the blood vessel is protected. When the proximal end of the bare stent section needs to be released, the push pipe 14 is pulled to the distal end through the push claw release mechanism 17, the push pipe 14 moves to the distal end to drive the push claw sleeve 3 to be far away from the clamping seat 1, and the push claw 8 loses the pressing constraint on the proximal end of the bare stent section, so that the proximal end of the bare stent section can be released. Among them, the single lumen tube 13 mainly plays the following roles: 1. a supporting function of supporting the exposed portion when the outer sheath 15 is withdrawn; and the single lumen tube 13 can improve the bending resistance of the outer sheath tube 15. 2. The passage is constructed, the outer sheath tube 15 is positioned outside the single lumen tube 13 and the reinforcement tube, and the single lumen tube 13 is longer than the distal end of the outer sheath tube 15 and is connected with the flushing joint.
In this embodiment, a convex ring 19 is disposed at the proximal end of the push tube 14, the convex ring 19 is disposed on an annular step 20 in the press jaw sleeve 3, and under the cooperation of the convex ring 19 and the annular step 20, the push tube 14 can drive the press jaw sleeve 3 to move distally in synchronization.
In this embodiment, the press claw release mechanism 17 includes a release shell 21 and a push pipe sleeve 22, the release shell 21 is sleeved on the protective shell 16, a first chute 23 extending circumferentially and a second chute 24 extending axially are provided on the protective shell 16, the first chute 23 is communicated with the proximal end of the second chute 24, a sliding block 25 is fixedly provided in the release shell 21, the sliding block 25 can slide into the second chute 24 from the first chute 23, when the sliding block 25 slides in the first chute 23, the axial position of the release shell 21 is unchanged, when the sliding block 25 slides into the second chute 24, the release shell 21 can move distally along the second chute 24, an annular limiting groove 26 is provided in the release shell 21, the push pipe sleeve 22 is fixedly sleeved on the distal end of the push pipe 14, a limiting block 27 penetrating through the second chute 24 and extending into the annular limiting groove 26 is fixedly provided on the push pipe sleeve 22, the limiting block 27 can move relatively circumferentially in the annular limiting groove 26, and the limiting block 27 and the annular limiting groove 26 are axially fixed relatively, when the release shell 21 moves distally along the second chute 24, the limiting block 27 is driven by the annular limiting groove 26 to move distally, so that the push pipe sleeve 22 and the push pipe sleeve 14 are driven distally. When the proximal end of the bare stent section is required to be released, the release shell 21 is rotated to enable the sliding block 25 in the release shell to slide into the second sliding groove 24 from the first sliding groove 23, then the release shell 21 is pushed distally along the second sliding groove 24 to drive the push pipe 14 to move distally, the push pipe 14 moves distally to drive the press claw sleeve 3 to move distally synchronously, the press claw 8 is pulled out from the proximal end of the bare stent section, and the constraint on the proximal end of the bare stent section is lost, so that the proximal end of the bare stent section is released conveniently.
In this embodiment, the sheath releasing mechanism 18 includes a fixed holding portion 28 and a sliding component 29, the fixed holding portion 28 is fixedly sleeved on the proximal end of the protective shell 16, a section of the outer peripheral surface of the protective shell 16 adjacent to the fixed holding portion 28 is provided with a second external thread 30, and an axially extending chute 31 is provided; an outer pipe sleeve 32 is fixedly sleeved on the outer wall of the distal end of the outer sheath pipe 15, an anti-rotation block 33 is fixedly arranged on the outer wall of the outer pipe sleeve 32, and the anti-rotation block 33 is arranged in the sliding groove 31 in a sliding manner;
the sliding assembly 29 comprises a sliding shell 34, a sliding sleeve 35, a sliding tail cover 36, a spring 37, a sliding plate 38, a pressing sleeve 39 and a sliding button 40, wherein the sliding sleeve 35 is sleeved outside the protective shell 16, a first through hole 41 is formed in the side wall of the sliding sleeve 35, the pressing sleeve 39 is sleeved outside the sliding sleeve 35, the pressing sleeve 39 is axially and relatively connected with the sliding sleeve 35 in a sliding manner, the circumferential direction is relatively and fixedly connected with one end of the sliding sleeve 35, a second through hole 42 is formed in the side wall of the pressing sleeve 39, the sliding tail cover 36 is sleeved outside the protective shell 16 and fixedly connected with one end of the sliding sleeve 35, the sliding plate 38 is rotatably connected onto the outer side wall of the sliding sleeve 35 through a rotating shaft, the sliding plates 38 on two sides of the rotating shaft are respectively provided with a first end 43 and a second end 44, the first end 43 and the second end 44 respectively correspond to the first through hole 41 and the second through hole 42, and sliding teeth 45 are arranged on the inner side surface of the first end 43; the spring 37 is sleeved outside the sliding sleeve 35, two ends of the spring 37 respectively prop against the sliding tail cover 36 and the pressing sleeve 39, the spring 37 is in a compressed state, the pressing sleeve 39 is pressed by the spring 37 to enable the pressing sleeve 39 to radially inwards press the first end 43, the first end 43 enables the sliding tooth 45 to be meshed with the second external thread 30 through the first through hole 41, and meanwhile the second end 44 extends into the second through hole 42; the sliding shell 34 is sleeved outside the pressing sleeve 39, the spring 37 and the sliding tail cover 36, a sliding hole 46 is formed in the sliding shell 34, the sliding button 40 penetrates through the sliding hole 46 to be fixedly connected with the pressing sleeve 39, when the sliding button 40 is pushed to compress the spring 37, the pressing sleeve 39 radially inwards presses the second end 44 to enable the sliding tooth 45 to be disengaged from the second external thread 30, a circle of rotating groove 47 is formed in the sliding shell 34, the anti-rotation block 33 penetrates through the sliding groove 31 to extend into the rotating groove 47, and the anti-rotation block 33 can relatively rotate in the rotating groove 47.
Wherein, the sliding button 40 and the pressing sleeve 39 are integrally formed. When the degree of the release bracket is accurately controlled, only the sliding shell 34 is required to be slowly rotated, the sliding shell 34 drives the pressing sleeve 39 and the sliding sleeve 35 to rotate together, and the sliding teeth 45 are meshed with the second external threads 30, so that the sliding shell 34 moves spirally on the protective shell 16, the movement is more accurate, and the sliding shell 34 drives the outer sheath 15 to axially move through the arrangement of the rotating groove 47 and the anti-rotation block 33, so that the aim of accurately controlling the degree of the release bracket is fulfilled; when the support is released quickly, the sliding button 40 is pushed to enable the sliding tooth 45 to be disengaged from the second external thread 30, and the sliding shell 34 can move quickly in the axial direction directly, so that the outer sheath 15 is driven to move quickly in the axial direction, and the quick release of the support is realized.
In this embodiment, the device further comprises a reinforcing tube, the reinforcing tube is sleeved outside the single-lumen tube 13, the reinforcing tube is arranged in the outer sheath tube 15, and the distal end of the reinforcing tube penetrates through the outer sheath tube 15 to extend to the distal end of the single-lumen tube 13 and is fixedly connected with the protective shell 16. By the arrangement of the reinforced pipe, the strength is improved, and the influence on the use caused by bending of the single-cavity pipe 13 is avoided.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (10)
1. A conveyor system support beam-converging mechanism, characterized in that: the clamping device comprises a clamping seat, a positioning sleeve and a pressing claw sleeve, wherein the clamping seat is connected to the proximal end of a central tube, a limiting convex ring is arranged at the distal end of the clamping seat, a plurality of clamping convex rings which are uniformly distributed are arranged on the outer peripheral surface of the limiting convex ring and used for sleeving and clamping a connecting piece at the proximal end of a bare section of a bracket, the positioning sleeve is arranged outside the clamping seat and is positioned at one side of the proximal end of the limiting convex ring, the positioning sleeve is fixedly connected with the clamping seat in the circumferential direction relatively, a plurality of limiting grooves which are axially and one by one correspond to the clamping convex rings are arranged on the outer peripheral surface of the positioning sleeve, the pressing claw sleeve is arranged on the central tube and positioned at one side of the distal end of the clamping seat, pressing claws which are corresponding to the limiting grooves are arranged on the outer periphery of the pressing claw sleeve extend to one side of the proximal end and are used for penetrating through the proximal end of the bare section of the bracket to press the proximal end of the bare section into the limiting grooves.
2. The conveyor system rack converging mechanism according to claim 1, wherein: the limiting convex ring can axially limit the positioning sleeve to prevent the positioning sleeve from moving to the far end.
3. The conveyor system rack converging mechanism according to claim 2, wherein: the proximal end of the clamping seat is provided with a first external thread which is used for being in threaded connection with a conical head at the proximal end of the central tube, and the conical head is in threaded connection with the proximal end of the clamping seat so as to tightly press the positioning sleeve on the limiting convex ring.
4. The conveyor system rack converging mechanism according to claim 1, wherein: the outer peripheral surface of the proximal end of the clamping seat is provided with two limiting planes which are oppositely arranged, and the locating sleeve is slidably sleeved at the proximal end of the clamping seat and is fixed with the clamping seat in the circumferential direction relatively through the two limiting planes.
5. The conveyor system rack converging mechanism according to claim 1, wherein: a gap for the bare section of the bracket to pass through is arranged between two adjacent pressing claws.
6. An abdominal aortic stent-graft delivery system, characterized by: the conveying system bracket beam-converging mechanism comprises any one of claims 1-5, and further comprises a central tube, a single-cavity tube, a jacking tube and an outer sheath tube, wherein the jacking tube is sleeved outside the central tube, the proximal end of the central tube passes through the jacking tube and the clamping seat and then is connected with the conical head, and the distal end of the central tube is fixedly connected with the protective shell; the proximal end of the jacking pipe is connected with the pressing claw sleeve, the distal end of the jacking pipe is connected with a pressing claw release mechanism, the pressing claw release mechanism is connected to the protective shell, and the jacking pipe can be pulled to the distal end through the pressing claw release mechanism; the push pipe moves to the far end to drive the pressure claw sleeve to be far away from the clamping seat so as to release the near end of the bare section of the bracket; the single-cavity pipe is sleeved outside the jacking pipe, and the distal end of the single-cavity pipe is fixedly connected to the protective shell; the sheath tube is sleeved outside the single-cavity tube, the pressing claw sleeve, the clamping seat and the positioning sleeve, the distal end of the sheath tube is connected with a sheath tube release mechanism, the sheath tube release mechanism is connected to the protective shell, the sheath tube can move to the distal end through the sheath tube release mechanism, and the sheath tube can move to the distal end to release the stent.
7. The abdominal aortic stent-graft delivery system of claim 6, wherein: the near end of the jacking pipe is provided with a convex ring, the convex ring is arranged on an annular step in the pressing claw sleeve, and under the cooperation of the convex ring and the annular step, the distal movement of the jacking pipe can drive the pressing claw sleeve to synchronously move to the distal end.
8. The abdominal aortic stent-graft delivery system of claim 6, wherein: the pressure claw release mechanism comprises a release shell and a top pipe sleeve, the release shell is arranged on the protective shell, a first sliding groove extending in the circumferential direction and a second sliding groove extending in the axial direction are arranged on the protective shell, the first sliding groove is communicated with the proximal end of the second sliding groove, a sliding block is fixedly arranged in the release shell, the sliding block can slide into the second sliding groove from the first sliding groove, when the sliding block slides in the first sliding groove, the axial position of the release shell is unchanged, when the sliding block slides into the second sliding groove, the release shell can move towards the distal end along the second sliding groove, an annular limiting groove is arranged in the release shell, the top pipe sleeve is fixedly sleeved at the distal end of the top pipe, a limiting block penetrating through the second sliding groove and extending into the annular limiting groove is fixedly arranged on the top pipe sleeve, the limiting block can move relatively in the circumferential direction in the annular limiting groove, the limiting block and the annular limiting groove are axially fixed relatively, and when the release shell moves along the second sliding groove, the release shell drives the limiting block to the distal end to move towards the distal end through the annular limiting groove.
9. The abdominal aortic stent-graft delivery system of claim 6, wherein: the sheath tube release mechanism comprises a fixed holding part and a sliding assembly, the fixed holding part is fixedly sleeved at the proximal end of the protective shell, a section of the outer peripheral surface of the protective shell, which is close to the fixed holding part, is provided with a second external thread, and is provided with an axially extending chute; an outer sleeve is fixedly sleeved on the outer wall of the far end of the outer sheath tube, an anti-rotation block is fixedly arranged on the outer wall of the outer sleeve, and the anti-rotation block is arranged in the sliding groove in a sliding manner;
the sliding assembly comprises a sliding shell, a sliding sleeve, a sliding tail cover, a spring, a sliding plate, a pressing sleeve and a sliding button, wherein the sliding sleeve is sleeved outside the protective shell, a first through hole is formed in the side wall of the sliding sleeve, the pressing sleeve is sleeved outside the sliding sleeve, the pressing sleeve is in axial relative sliding connection with the sliding sleeve, the circumferential relative fixed connection is performed, a second through hole is formed in the side wall of the pressing sleeve, the sliding tail cover is sleeved outside the protective shell and is fixedly connected with one end of the sliding sleeve, the sliding plate is rotatably connected onto the outer side wall of the sliding sleeve through a rotating shaft, the sliding plates on two sides of the rotating shaft are respectively provided with a first end and a second end, the first end and the second end respectively correspond to the first through hole and the second through hole, and sliding teeth are arranged on the inner side surface of the first end; the spring is sleeved outside the sliding sleeve, two ends of the spring respectively prop against the sliding tail cover and the pressing sleeve, the spring is in a compressed state, the pressing sleeve is pressed by the spring to enable the pressing sleeve to radially inwards press the first end, the first end enables the sliding teeth to be meshed with the second external threads through the first through hole, and meanwhile the second end stretches into the second through hole; the sliding shell is sleeved outside the pressing sleeve, the spring and the sliding tail cover, a sliding hole is formed in the sliding shell, the sliding button penetrates through the sliding hole and is fixedly connected with the pressing sleeve, when the sliding button is pushed to compress the spring, the pressing sleeve radially inwards extrudes the second end to enable the sliding teeth to be disengaged from the second external threads, a circle of rotating groove is formed in the sliding shell, and the anti-rotation block penetrates through the sliding groove and stretches into the rotating groove and can relatively rotate in the rotating groove.
10. The abdominal aortic stent-graft delivery system of claim 6, wherein: the single-cavity catheter is characterized by further comprising a reinforcing tube, wherein the reinforcing tube is sleeved outside the single-cavity catheter, the reinforcing tube is arranged in the outer sheath catheter, and the distal end of the reinforcing tube penetrates through the outer sheath catheter to extend to the distal end of the single-cavity catheter and is fixedly connected with the protective shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310825635.4A CN116549194B (en) | 2023-07-07 | 2023-07-07 | Conveying system support beam-contracting mechanism and abdominal aortic tectorial membrane support conveying system |
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| CN202310825635.4A CN116549194B (en) | 2023-07-07 | 2023-07-07 | Conveying system support beam-contracting mechanism and abdominal aortic tectorial membrane support conveying system |
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Cited By (1)
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| CN117224299A (en) * | 2023-11-10 | 2023-12-15 | 浙江归创医疗科技有限公司 | Conveying system of window bracket |
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| CN113599040A (en) * | 2021-09-17 | 2021-11-05 | 北京有卓正联医疗科技有限公司 | Front-end rear-release mechanism of interventional stent conveyor, conveyor and using method |
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| US20090204202A1 (en) * | 2008-02-08 | 2009-08-13 | William Cook Australia Pty. Ltd. | Stent designs for use with one or more trigger wires |
| CN105943212A (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 handle assembly thereof |
| CN208725966U (en) * | 2017-08-03 | 2019-04-12 | 先健科技(深圳)有限公司 | Bracket conveyer |
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