CN108095804B - Multifunctional inner bracket loading, recovering and releasing device for cerebral vascular variability - Google Patents
Multifunctional inner bracket loading, recovering and releasing device for cerebral vascular variability Download PDFInfo
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- CN108095804B CN108095804B CN201810138420.4A CN201810138420A CN108095804B CN 108095804 B CN108095804 B CN 108095804B CN 201810138420 A CN201810138420 A CN 201810138420A CN 108095804 B CN108095804 B CN 108095804B
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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
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B17/221—Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions
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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
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- 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
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
- A61F2/91—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/22—Implements for squeezing-off ulcers or the like on the inside of inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; Calculus removers; Calculus smashing apparatus; Apparatus for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22001—Angioplasty, e.g. PCTA
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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
- A61F2002/9505—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
- A61F2002/9511—Instruments specially adapted for placement or removal of stents or stent-grafts having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument the retaining means being filaments or wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2002/9528—Instruments specially adapted for placement or removal of stents or stent-grafts for retrieval of stents
-
- 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
- A61F2/962—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve
- A61F2/966—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
- A61F2002/9665—Instruments specially adapted for placement or removal of stents or stent-grafts having an outer sleeve with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod with additional retaining means
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- 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
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Abstract
The invention relates to a cerebral vascular variability multifunctional inner support loading, recovering and releasing device. Comprising the following steps: the device comprises a retraction rod, a middle sleeve, an outer sleeve, a retraction claw, a marker, a first bolt taking net, a woven net and a second bolt taking net; the plurality of the retraction claws and the plurality of the marking bodies are all in the same number, the plurality of the retraction claws are circumferentially distributed and connected to the retraction rod, the plurality of the marking bodies are correspondingly arranged on the plurality of the retraction claws, the first bolt taking net, the woven net and the second bolt taking net are sequentially connected, and the retraction ends of the first bolt taking net are correspondingly connected with the plurality of the marking bodies; when the folding and unfolding claw is compressed, the folding and unfolding claw respectively abuts against the middle sleeve and the outer sleeve. After the net structure is pushed out, the whole net structure is in a tubular rolled state, so that thrombus taking is convenient, and the net structure can be used as an embedded inner bracket and can be used for two purposes. When the marker is not completely released, the device can be used as an intraarterial stent for recovery, and after the marker is completely released, the released reticular structure is used as an imbedded intraarterial stent.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to a loading, recovering and releasing device for a multifunctional inner bracket with cerebral vascular variability.
Background
Along with the improvement of living standard, the incidence of hypertension, hyperlipidemia and hyperglycemia is continuously increased, and along with the improvement, the incidence of cerebrovascular diseases is also rapidly increased. The incidence, mortality and severe disability rate of cerebrovascular disease are all the first. In recent years, with the popularization and popularization of non-invasive cerebral vascular imaging technology, the discovery rate of uncracked cerebral aneurysms is higher and higher, the specific gravity of preventive embolism treatment before cerebral aneurysms are not ruptured is higher and higher, and most cerebral aneurysm embolism is carried out with the assistance of an inner bracket. The internal stent technology of interventional therapy is increasingly applied to various cerebrovascular diseases, such as cerebral arterial embolism, cerebral arterial thrombosis, serious cerebral arterial stenosis, cerebral aneurysm and the like, and gradually becomes the first therapeutic scheme of the cerebrovascular diseases. The technology of taking out cerebral thrombosis, relieving cerebral vascular stenosis, assisting in embolizing (treating) cerebral aneurysm and the like by adopting an intracranial stent (for convenience) is becoming mature.
The existing intracranial stent for interventional therapy of cerebrovascular diseases can only be used for taking out intracranial vascular thrombosis, or can only be used for assisting cerebral aneurysm embolism, or can only be suitable for relieving cerebral vascular stenosis, and has the following defects: (1) the inner bracket has single function, depends on import, and has high cost. (2) The single-function inner support forces the intervention operating room of the hospital to be provided with a plurality of inner support instruments with different functions, prices and specifications, thereby wasting manpower and financial resources. (3) When a plurality of inner brackets are needed, a doctor needs to master different bracket operations in a longer learning period, which is not beneficial to the rapid popularization of the technology. (4) When thrombus is taken out by recycling and is permanently placed to relieve vascular stenosis to exert various therapeutic effects, a plurality of internal stents are required, so that medical cost is doubled.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a multifunctional loading, recovering and releasing device for a cerebral vascular variability inner stent, which can be used as an inner stent for operation and can be used for taking out thrombus.
The invention aims at realizing the following technical scheme:
the invention provides a cerebral vascular variability multifunctional inner stent loading, recovering and releasing device, which comprises: the device comprises a retraction rod, a middle sleeve, an outer sleeve, a retraction claw, a marker, a first bolt taking net, a woven net and a second bolt taking net; the plurality of the retraction claws and the plurality of the marking bodies are all in the same number, the plurality of the retraction claws are circumferentially distributed and connected on the retraction rod, the retraction rod is movably arranged in the middle sleeve, the plurality of the marking bodies are correspondingly arranged on the plurality of the retraction claws, the middle sleeve is movably arranged in the outer sleeve, the first bolt taking net, the woven net and the second bolt taking net are sequentially connected, and the plurality of retraction ends of the first bolt taking net are correspondingly connected with the plurality of marking bodies; when the folding and unfolding claw is compressed, the folding and unfolding claw respectively abuts against the middle sleeve and the outer sleeve.
Further, the first bolt removing net and the second bolt removing net are bolt removing silk screens, the bolt removing silk screens are formed by laser engraving, and the first bolt removing net, the woven net and the second bolt removing net are sequentially connected through spot welding.
Further, a plurality of first guide grooves corresponding to the positions of the plurality of retraction claws are formed in the inner wall of the end part of the middle sleeve, and the retraction claws abut against the first guide grooves of the middle sleeve when being compressed.
Further, a conical surface is arranged on the inner wall of the end part of the middle sleeve, and the retraction claw abuts against the conical surface of the middle sleeve when being compressed.
Further, a plurality of second guide grooves corresponding to the positions of the plurality of retraction claws are formed in the inner wall of the outer sleeve, and the retraction claws abut against the second guide grooves of the outer sleeve when being compressed.
Further, a sliding key is arranged on the middle sleeve, and the middle sleeve is movably arranged in the outer sleeve in a matched mode through the sliding key and the second guide groove.
Further, a marker attaching cambered surface is arranged on the retraction claw, the marker is arranged on the marker attaching cambered surface, the marker is a marker ball for contrast marking, and when the retraction claw is compressed, the centers of a plurality of marker balls form a circle and the two adjacent marker balls are in plane contact.
Further, the device also comprises an elastic piece, and the elastic piece is connected between the retraction rod and the middle sleeve and used for resetting the retraction rod.
Further, the elastic piece is a spring, and the device further comprises a one-way clamping ring which is arranged on the retraction rod; one end of the spring is connected with the middle sleeve, and the other end is connected with the unidirectional clamping ring.
Further, the end of the retraction rod is provided with a button, and the button comprises a cylindrical section and a conical section which are connected.
When the cerebral vascular variability multifunctional inner support loading, recovering and releasing device is used, after a net structure consisting of a first thrombus taking net, a woven net and a second thrombus taking net is pushed out, the whole net structure is in a tubular rolling state, so that thrombus taking is convenient, and the net structure can be used as an embedded inner support and can be used for two purposes. When the marker is not completely released, the device can be used as a thrombus taking device, and after the marker is completely released, the released tubular net structure is used as an embedded inner bracket.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a block diagram of a portion of a sleeve structure of the present invention;
FIG. 2 is a schematic view of another portion of the sleeve structure of the present invention;
FIG. 3 is a block diagram of the sleeve structure of the present invention;
FIG. 4 is a block diagram of a bushing in accordance with the present invention;
FIG. 5 is a view showing the construction of the inside of the sleeve according to the present invention;
FIG. 6 is a block diagram of an outer sleeve of the present invention;
FIG. 7 is a diagram showing the flattened state of the mesh structure in the loading, recovering and releasing device of the multifunctional stent with cerebrovascular variability according to the present invention;
FIG. 8 is a diagram showing the rolled state of the mesh structure in the loading, recovering and releasing device of the multifunctional inner stent with cerebrovascular variability according to the present invention;
FIG. 9 is a diagram showing the status of the mesh structure in the loading, retrieving and releasing device for the cerebral vascular variability multifunctional inner stent according to the present invention;
FIG. 10 is a diagram showing the construction of the mesh structure of the loading, retrieving and releasing device for a cerebral vascular variability multifunctional stent according to the present invention when used as an stent;
FIG. 11 is a view showing the construction of the loading, retrieving and releasing device for the multifunctional inner stent with cerebral vascular variability according to the present invention when the retrieving and releasing claws are released;
FIG. 12 is a block diagram of the loading, retrieving and releasing device of the multifunctional inner stent with cerebral vascular variability according to the present invention when the retrieving and releasing claws are not released;
wherein the reference numerals are as follows: 1. a retractable rod; 2. a middle sleeve; 3. an outer sleeve; 4. a retractable claw; 5. a marker; 6. a first thrombolytic mesh; 7. a woven mesh; 8. a second embolectomy; 9. a first guide groove; 10. a conical surface; 11. a second guide groove; 12. a sliding key; 13. a spring; 14. a one-way snap ring; 15. a button; 16. a cylindrical section; 17. a conical section; 18. welding spots; 19. the marker body is adhered to the cambered surface.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
As shown in fig. 1 to 12, a multifunctional stent loading, recovering and releasing device for cerebral vascular variability according to an embodiment of the present invention is composed of a sleeve structure and a mesh structure, and comprises: the device comprises a retractable rod 1, a middle sleeve 2, an outer sleeve 3, a retractable claw 4, a marker 5, a first bolt taking net 6, a woven net 7 and a second bolt taking net 8; the number of the retractable claws 4 and the number of the marking bodies 5 are the same, the retractable claws 4 are circumferentially distributed and connected to the retractable rod 1, the retractable rod 1 is movably arranged in the middle sleeve 2, the marking bodies 5 are correspondingly arranged on the retractable claws 4, the middle sleeve 2 is movably arranged in the outer sleeve 3, the first bolt taking net 6, the woven net 7 and the second bolt taking net 8 are sequentially connected, and the retractable ends of the first bolt taking net 6 are correspondingly connected with the marking bodies 5; when the retraction claw 4 is compressed, the retraction claw abuts against the middle sleeve 2 and the outer sleeve 3 respectively.
When the cerebral vascular variability multifunctional inner support loading, recovering and releasing device is used, after the net structure consisting of the first thrombus taking net 6, the woven net 7 and the second thrombus taking net 8 is pushed out, the whole net structure is in a rolled state, so that thrombus taking is convenient, and meanwhile, the middle woven net 7 can be used as an embedded inner support by adopting the woven structure, so that the cerebral vascular variability multifunctional inner support can be used for two purposes. When the marker body 5 is not completely released, the device can be used as a thrombus taking device, and after the marker body 5 is completely released, the released net structure is used as an imbedded type intra-operation support.
Preferably, the first and second bolt removing nets 6 and 8 are bolt removing nets, the bolt removing nets are formed by laser engraving, the first bolt removing net 6, the woven net 7 and the second bolt removing net 8 are sequentially connected through spot welding, and particularly, the welding spots 18 in fig. 7 are seen, so that the first bolt removing net 6, the woven net 7 and the second bolt removing net 8 are firmly fixed and have small welding spots, and the performance of the whole net structure is not affected.
The receiving and releasing ends are receiving and releasing wire drawing ends, the marking bodies 5 are in one-to-one correspondence with the receiving and releasing wire drawing ends and are fixedly connected, the receiving and releasing wire drawing function is adopted, the receiving and releasing pulling function can be achieved, and the distance between the adjacent wire drawing is larger than the space of the mesh holes of the woven mesh 7 in the mesh structure, so that thrombus can be collected and taken out conveniently. The two ends of the net-shaped structure are bolt taking silk screens (formed by laser engraving), and the middle section is a woven mesh 7. The three parts of the structure are connected to form the main innovation point, when the structure is in a natural state, the whole net structure is in a rolled state, the upper edge and the lower edge are rolled and contacted but are not intersected, when the net structure is pushed out, the whole net structure is in a rolled state, so that thrombus taking is convenient, and meanwhile, the middle woven net 7 can be used as an embedded type inner support by adopting a woven structure, so that one object can be used for two purposes. When the marker body 5 is not completely released, the device can be used as a thrombus taking device, and after the marker body 5 is completely released, the released net structure is used as an imbedded type intra-operation support.
Preferably, the inner wall of the end of the middle sleeve 2 is provided with a plurality of first guide grooves 9 corresponding to the positions of the plurality of retraction claws 4, and the retraction claws 4 abut against the first guide grooves 9 of the middle sleeve 2 when being compressed. The inner wall of the end part of the middle sleeve 2 is provided with a conical surface 10, and the retraction claw 4 abuts against the conical surface 10 of the middle sleeve 2 when being compressed.
The inner opening at the front end of the middle sleeve 2 is conical, so that the folding and unfolding of the folding and unfolding claw 4 are facilitated. The conical surface 10 area of the inner opening at the front end of the middle sleeve 2 is also provided with first guide grooves 9 which are guide grooves corresponding to the collecting and releasing claws 4 one by one and are used for guiding the collecting and releasing claws 4 when the collecting and releasing claws 4 do not contact the outer sleeve 3 during pushing.
Preferably, the inner wall of the outer sleeve 3 is provided with a plurality of second guide grooves 11 corresponding to the positions of the plurality of retraction claws 4, and the retraction claws 4 abut against the second guide grooves 11 of the outer sleeve 3 when being compressed.
The outermost side of the sleeve structure is an outer sleeve 3, the outer sleeve 3 is of a hollow structure, a guide groove, namely a second guide groove 11, is axially formed in the inner side of the sleeve structure and is used for guiding the retracting claw 4 and the middle sleeve 2, the guide grooves correspond to the retracting claws 4 one by one in the circumferential direction, and the number of the guide grooves is the same as that of the retracting claws 4. The collecting and releasing claws 4 are in divergent distribution, one part of the collecting and releasing claws 4 are always positioned in the guide groove of the outer sleeve 3, the collecting and releasing claws 4 are in one-to-one correspondence with collecting and releasing wires at the front end of the net structure of the thrombus taking, more than three collecting and releasing wires are adopted, and the collecting and releasing claws 4 can expand and contract.
Preferably, the middle sleeve 2 is provided with a sliding key 12, and the middle sleeve 2 is movably arranged in the outer sleeve 3 through the sliding key 12 and the second guide groove 11 in a matched mode.
The outer sleeve 3 is provided with a middle sleeve 2, and three sliding keys 12 are arranged on the circumference of the outer wall of the middle sleeve 2 in the axial direction and can be matched with guide grooves on the inner wall of the outer sleeve 3 so as to guide.
Preferably, the retractable claw 4 is provided with a marker attaching cambered surface 19, and the marker 5 is arranged on the marker attaching cambered surface 19, so that the marker 5 is more firmly and reliably arranged; the marker body 5 is a marker ball for contrast marking, and when the retractable claw 4 is compressed, the centers of a plurality of marker balls form a circle and the two adjacent marker balls are in plane contact.
The marking ball corresponding to the folding claw 4 is arranged, and the marking ball has two functions: firstly, the position of the reticular structure in the body can be known through the marking ball to judge whether the reticular structure reaches the designated position or not; and secondly, when the device is used as a thrombus taking device, the marking ball does not need to be completely released, so that the marking ball is conveniently grasped by the retracting claw 4 to retract and release the net-shaped structure. In the contracted state, the contact between the adjacent marking balls is plane contact, so that the fixing and grabbing are convenient.
Preferably, the device further comprises an elastic element, and the elastic element is connected between the retraction rod 1 and the middle sleeve 2 and used for resetting the retraction rod 1. The elastic piece is a spring 13, can also be other elastic bodies with elastic resetting, and also comprises a guide clamping ring 14, wherein the guide clamping ring 14 is arranged on the retraction rod 1; one end of the spring 13 is connected with the middle sleeve 2, and the other end is connected with the guide snap ring 14.
Preferably, the end of the retraction lever 1 is provided with a push button 15, the push button 15 comprising a cylindrical section 16 and a conical section 17 connected. The collecting point of the collecting and releasing claw 4 is fixedly connected with the collecting and releasing rod 1, the other end of the collecting and releasing rod 1 is fixedly connected with the button 15 coaxially, the button 15 consists of a cylindrical section 16 and a conical section 17, the cylindrical section 16 is convenient to press, and the conical section 17 is convenient to continuously receive the collecting and releasing rod 1.
The push button 15 and the retraction rod 1 are both positioned in the middle sleeve 2, the retraction rod 1 is coaxially and fixedly connected with a guide snap ring 14, a spring 13 is arranged between the guide snap ring 14 and the middle sleeve 2, when the push button 15 is pressed down, the retraction rod 1 drives the guide snap ring 14 to move axially forwards to compress the spring 13, and when the retraction claw 4 pushes out the marking ball to open, the push button 15 is released, and the spring 13 pushes the guide snap ring 14 to reset the retraction rod 1.
In use, in an initial state, the mesh structure is fully contracted in the outer sleeve 3, as shown in fig. 9, so that the outer sleeve 2 can be conveniently placed into a cerebral vessel from the outside, after placement, the middle sleeve 2 moves relative to the outer sleeve 3, the mesh structure is gradually pushed out, after pushing out, the mesh structure is naturally rolled (which has elasticity and is in a rolled state under the condition of no external force), if the mesh structure is used as a thrombus taking device, the button 15 is pressed with small acting force, the retracting claw 4 is slightly unfolded through the retracting rod 1, the marking ball is unfolded, and the retracting claw 4 is not separated, as shown in fig. 8. The retractable wire drawing of front end can play the effect of retractable pulling, again because the interval between the adjacent wire drawing is greater than the space of the mesh of the woven mesh 7 in the network structure, is convenient for collect and takes out of thrombus. If the net structure is used as an implantation type internal support, the button 15 is pressed with a large force, the retraction claw 4 is fully unfolded through the retraction rod 1, the marking ball is separated from the retraction claw 4, implantation is completed, and the whole net structure is positioned in a cerebral blood vessel and used as an internal support, see fig. 10.
The innovation point of the invention is that:
1. the two ends of the net-shaped structure are bolt taking silk screens (formed by laser engraving), and the middle section is a woven mesh 7. The three parts of the structure are connected to form the main innovation point, when the structure is in a natural state, the whole net structure is in a rolled state, the upper edge and the lower edge are rolled and contacted but are not intersected, when the net structure is pushed out, the whole net structure is in a rolled state, so that thrombus taking is convenient, and meanwhile, the middle woven net 7 can be used as an embedded type inner support by adopting a woven structure, so that one object can be used for two purposes. When the marker body 5 is not completely released, the device can be used as a thrombus taking device, and after the marker body 5 is completely released, the released net structure is used as an imbedded type intra-operation support.
2. The outermost side of the sleeve structure is an outer sleeve 3, the outer sleeve 3 is of a hollow structure, a guide groove, namely a second guide groove 11, is axially formed in the inner side of the sleeve structure and is used for guiding the retracting claw 4 and the middle sleeve 2, the guide grooves correspond to the retracting claws 4 one by one in the circumferential direction, and the number of the guide grooves is the same as that of the retracting claws 4.
3. The collecting and releasing claws 4 are in divergent distribution, one part of the collecting and releasing claws 4 are always positioned in the guide groove of the outer sleeve 3, the collecting and releasing claws 4 are in one-to-one correspondence with collecting and releasing wires at the front end of the net structure of the thrombus taking, more than three collecting and releasing wires are adopted, and the collecting and releasing claws 4 can expand and contract. The collecting point of the collecting and releasing claw 4 is fixedly connected with the collecting and releasing rod 1, the other end of the collecting and releasing rod 1 is fixedly connected with the button 15 coaxially, the button 15 consists of a cylindrical section 16 and a conical section 17, the cylindrical section 16 is convenient to press, and the conical section 17 is convenient to continuously receive the collecting and releasing rod 1. The outer sleeve 3 is provided with a middle sleeve 2, and three sliding keys 12 are arranged on the circumference of the outer wall of the middle sleeve 2 in the axial direction and can be matched with guide grooves on the inner wall of the outer sleeve 3 so as to guide.
4. The push button 15 and the retraction rod 1 are both positioned in the middle sleeve 2, the retraction rod 1 is coaxially and fixedly connected with a guide snap ring 14, a spring 13 is arranged between the guide snap ring 14 and the middle sleeve 2, when the push button 15 is pressed down, the retraction rod 1 drives the guide snap ring 14 to move axially forwards to compress the spring 13, and when the retraction claw 4 pushes out the marking ball to open, the push button 15 is released, and the spring 13 pushes the guide snap ring 14 to reset the retraction rod 1.
5. The inner opening at the front end of the middle sleeve 2 is conical, so that the folding and unfolding of the folding and unfolding claw 4 are facilitated. The conical surface 10 area of the inner opening at the front end of the middle sleeve 2 is also provided with first guide grooves 9 which are guide grooves corresponding to the collecting and releasing claws 4 one by one and are used for guiding the collecting and releasing claws 4 when the collecting and releasing claws 4 do not contact the outer sleeve 3 during pushing.
6. The marking ball corresponding to the folding claw 4 is arranged, and the marking ball has two functions: firstly, the position of the reticular structure in the body can be known through the marking ball to judge whether the reticular structure reaches the designated position or not; and secondly, when the device is used as a thrombus taking device, the marking ball does not need to be completely released, so that the marking ball is conveniently grasped by the retracting claw 4 to retract and release the net-shaped structure. In the contracted state, the contact between the adjacent marking balls is plane contact, so that the fixing and grabbing are convenient.
7. The marking balls are in one-to-one correspondence with the winding and unwinding wire drawing ends, are fixedly connected, and can play a role in winding, unwinding and pulling by adopting the winding and unwinding wire drawing effect, and because the interval between adjacent wire drawing is larger than the space of the mesh holes of the woven mesh 7 in the mesh structure, thrombus is conveniently collected and taken out.
8. When in use, in the initial state, the net structure is completely contracted in the outer sleeve 3, so that the net structure is conveniently placed into a cerebral vessel from the outside, after the net structure is placed, the middle sleeve 2 moves relative to the outer sleeve 3, the net structure is gradually pushed out, and after the net structure is pushed out, the net structure is naturally rolled up (the net structure has elasticity and is in a rolled state under the condition of not being subjected to external force).
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. A cerebral vascular variability multifunctional stent loading retrieval and release device, comprising: the device comprises a retraction rod, a middle sleeve, an outer sleeve, a retraction claw, a marker, a first bolt taking net, a woven net and a second bolt taking net; the number of the retractable claws and the number of the markers are the same, the retractable claws are circumferentially distributed and connected to the retractable rod, the retractable rod is movably arranged in the middle sleeve, the markers are correspondingly arranged on the retractable claws, the middle sleeve is movably arranged in the outer sleeve, the first bolt removing net, the woven net and the second bolt removing net are sequentially connected, and the retractable ends of the first bolt removing net are correspondingly connected with the markers; the retraction claw is respectively propped against the middle sleeve and the outer sleeve when being compressed;
the first bolt removing net and the second bolt removing net are bolt removing silk screens, the bolt removing silk screens are formed by laser engraving, and the first bolt removing net, the woven net and the second bolt removing net are sequentially connected through spot welding.
2. The device according to claim 1, wherein a plurality of first guide grooves corresponding to the positions of the plurality of retraction claws are formed on the inner wall of the end part of the middle sleeve, and the retraction claws abut against the first guide grooves of the middle sleeve when being compressed.
3. The device according to claim 1, wherein the inner wall of the end portion of the middle sleeve is provided with a conical surface against which the retraction pawl abuts when compressed.
4. The device of claim 1, wherein a plurality of second guide grooves corresponding to the positions of the plurality of retraction claws are formed on the inner wall of the outer sleeve, and the retraction claws abut against the second guide grooves of the outer sleeve when being compressed.
5. The device according to claim 4, wherein a sliding key is arranged on the middle sleeve, and the middle sleeve is movably mounted in the outer sleeve in a matched mode through the sliding key and the second guide groove.
6. The device according to claim 1, wherein a marker attaching cambered surface is arranged on the retraction claw, the marker is arranged on the marker attaching cambered surface, the marker is a marker ball for contrast marking, and when the retraction claw is compressed, the centers of a plurality of marker balls form a circle, and two adjacent marker balls are in plane contact.
7. The device of claim 1, further comprising an elastic member coupled between the retraction rod and the middle cannula for resetting the retraction rod.
8. The device of claim 7, wherein the resilient member is a spring, the device further comprising a one-way snap ring disposed on the retraction lever; one end of the spring is connected with the middle sleeve, and the other end of the spring is connected with the one-way clamping ring.
9. The device of claim 1, wherein the end of the retraction lever is provided with a button comprising a cylindrical section and a conical section connected.
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| CN201810138420.4A CN108095804B (en) | 2018-02-10 | 2018-02-10 | Multifunctional inner bracket loading, recovering and releasing device for cerebral vascular variability |
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| CN108095804B true CN108095804B (en) | 2023-08-08 |
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| US9028540B2 (en) * | 2011-03-25 | 2015-05-12 | Covidien Lp | Vascular stent with improved vessel wall apposition |
| US20160302794A1 (en) * | 2015-04-15 | 2016-10-20 | Cook Medical Technologies Llc | Detachment mechanism for vascular devices |
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| CN104582607A (en) * | 2012-08-14 | 2015-04-29 | W.L.戈尔及同仁股份有限公司 | Devices and systems for thrombus treatment |
| CN104755049A (en) * | 2012-09-27 | 2015-07-01 | 柯惠有限合伙公司 | Vascular stent with improved vessel wall apposition |
| WO2014081077A1 (en) * | 2012-11-26 | 2014-05-30 | 연세대학교 원주산학협력단 | Stent module for removing blood clots |
| CN103284775A (en) * | 2013-06-04 | 2013-09-11 | 加奇生物科技(上海)有限公司 | Encephalic thrombosis removing device |
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