CN109172077B - Release device of intravascular stent with tail-end thrombus arresting net - Google Patents
Release device of intravascular stent with tail-end thrombus arresting net Download PDFInfo
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- CN109172077B CN109172077B CN201810801354.4A CN201810801354A CN109172077B CN 109172077 B CN109172077 B CN 109172077B CN 201810801354 A CN201810801354 A CN 201810801354A CN 109172077 B CN109172077 B CN 109172077B
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- Prior art keywords
- catheter
- stent
- outer catheter
- lock catch
- thrombus
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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
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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
- 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
Abstract
The invention discloses a release device of a vascular stent with a tail-end thrombus arresting net, which comprises an outer catheter and a core body which are sleeved in a sliding manner, wherein a guide wire cavity is formed in the core body, the core body comprises a stent supporting tube, a lock catch body, an inner catheter and a guide wire joint which are connected in sequence, a plurality of lock catches are uniformly arranged on the outer wall of the lock catch body in the circumferential direction, the outer catheter and the inner catheter are locked in a sliding manner through a locking device, the tail end of the outer catheter is provided with a pull handle, and the tail end of the inner catheter is. On one hand, the intravascular stent release device with the structure can reliably fix the intravascular stent in the process of implanting the intravascular stent into a blood vessel; on the other hand, the operation is simple and convenient, and the operation efficiency can be improved and the operation risk can be reduced.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a release device of a vascular stent with a tail-end thrombus blocking net.
Background
Cardiovascular diseases become one of the main causes of death of human diseases, such as aortic dissection, arterial embolism, aneurysm and the like in vascular diseases, the consequences of the vascular diseases are generally serious, and if timely and proper treatment is not adopted, the blood vessels can be ruptured and bleeding or infarcted, and the death rate is very high. For the treatment of such vascular diseases, open surgery and minimally invasive interventional therapy surgery are the main procedures at present, and the minimally invasive interventional therapy surgery has gradually become the preferred method for treating the vascular diseases because of the characteristics of no need of opening abdomen, small wound, low requirement on the corresponding physical conditions of patients and the like. The minimally invasive interventional therapy operation is to implant a blood vessel support into a diseased blood vessel so as to isolate a diseased cavity and rebuild a blood flow path in situ, and a plurality of locking rings are usually and uniformly arranged at the far end of the blood vessel support in the circumferential direction so as to fix the blood vessel support in the implantation process.
In the prior art, the stent is implanted in a diseased blood vessel through a minimally invasive interventional operation, although the stent has the functions of isolating a diseased cavity and reconstructing a blood flow path in situ, for patients with higher risk of thrombotic events (such as atrial fibrillation patients, Lerich syndrome, arteriosclerosis obliterans with high-load thrombus and patients with thrombosis), although the stent is implanted in the diseased blood vessel of the patients, and simultaneously, anticoagulation with higher strength and antiplatelet therapy are used, the risk that free thrombus in the blood vessel or fallen larger plaque to a tip or middle artery causes embolism again is still avoided, for example, the embolism can cause cerebral apoplexy at the bifurcation of a cerebral vessel, and the embolism can cause coronary heart disease to cause sudden death and serious disability at the coronary artery.
At present, the method generally adopted for solving the problems is to arrange a reticular arresting structure at the tail end of the blood vessel stent, and the reticular arresting structure is used for catching free thrombus or fallen large plaques so as to reduce the injury to the human body. However, how to release the intravascular stent in a lesion part with high efficiency, reliability and small risk becomes a difficult problem to be solved urgently.
The existing blood vessel stent release device has the defects of complex operation, unreliable blood vessel stent fixation in the implantation process of the blood vessel stent, inconvenience for improving the operation efficiency, improvement of operation risks and the like.
Disclosure of Invention
In view of the above, the present invention provides a releasing device of a blood vessel stent with a terminal thrombus blocking net, which, on one hand, can reliably fix the blood vessel stent in the process of implanting the blood vessel stent into a blood vessel; on the other hand, the operation is simple and convenient, and the operation efficiency can be improved and the operation risk can be reduced.
The invention solves the problems through the following technical means: the utility model provides a take release of terminal thrombus arresting barrier's vascular support, includes outer pipe and the core that slides and cup joint, form the wire chamber in the core, the core is including the support stay tube, the hasp body, interior pipe and the seal wire joint that connect gradually, hasp body outer wall circumference evenly is provided with a plurality of hasps, realize the slip locking through locking device between outer pipe and the interior pipe, outer pipe tail end is provided with the pull handle, and interior pipe tail end is provided with the grab handle.
Furthermore, the front end and the rear end of the lock catch body are both provided with a connecting boss, an annular groove is formed between the connecting boss and the lock catch body, and the connecting boss and the lock catch body can be respectively and firmly connected with the support supporting tube and the inner conduit in a hot melting or gluing mode.
Further, the head end of the outer catheter is provided with a conical head made of elastic soft materials.
Furthermore, a developing marker is arranged at the joint of the conical head and the outer catheter.
Furthermore, a hemostatic valve is arranged in the pull handle, and the hemostatic valve is in sealing sliding fit with the inner catheter body.
Furthermore, a plurality of clamping grooves which are clamped with the locking ring of the intravascular stent are uniformly arranged on the outer wall of the locking body in the circumferential direction.
Further, the pull handle and the grab handle are respectively integrally formed with the outer catheter and the inner catheter.
The invention has the beneficial effects that: the release device of the intravascular stent with the tail-end thrombus arresting net comprises an outer catheter and a core body which are sleeved in a sliding manner, wherein a guide wire cavity is formed in the core body, the core body comprises a stent supporting tube, a lock catch body, an inner catheter and a guide wire connector which are connected in sequence, a plurality of lock catches are uniformly arranged on the outer wall of the lock catch body in the circumferential direction, the outer catheter and the inner catheter are locked in a sliding manner through a locking device, the tail end of the outer catheter is provided with a pull handle, and the tail end of the inner catheter is provided with a. On one hand, the intravascular stent release device with the structure can reliably fix the intravascular stent in the process of implanting the intravascular stent into a blood vessel; on the other hand, the operation is simple and convenient, and the operation efficiency can be improved and the operation risk can be reduced.
Drawings
The invention is further described below with reference to the figures and examples.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a partially enlarged view of the head end structure of the present invention;
fig. 3 is a schematic perspective view of the locking body;
FIG. 4 is a schematic view of the assembly of a vascular stent;
fig. 5 is a schematic release diagram of the vascular stent.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1-2, the release device of the intravascular stent with the terminal thrombus arresting net comprises an outer catheter 1 and a core body which are sleeved in a sliding manner, wherein a conical head 13 made of elastic soft material is arranged at the head end of the outer catheter, on one hand, when the outer catheter is placed into a blood vessel, the soft conical head can avoid damaging the vascular tissue, on the other hand, the conical head has elasticity and forms a necking at a small-diameter end, in the process of releasing the intravascular stent, the outer catheter gradually retreats, and before the intravascular stent is not completely exposed, the necking of the conical head compresses the intravascular stent, so that the stent is prevented from jumping to influence the release safety. The junction of conical head and outer pipe is provided with and shows mark 14, and it is visual under X ray to show the mark, can be more clear when release vascular support show support and release's relative position, realizes the accurate release of support. Form thread guide chamber 2 in the core, can be used to wear to establish the seal wire and carry the liquid medicine in the operation, the core is including the support stay tube 3, the hasp body 4, interior pipe 5 and the seal wire joint 6 that connect gradually, hasp body outer wall circumference evenly is provided with a plurality of hasps 7, and the hasp ring of intravascular stent telecentric connections end after the compression can assemble in proper order and overlap and establish on the hasp, realizes intravascular stent axial fixation in on the interior pipe, simultaneously, atress between hasp and the hasp ring makes intravascular stent after the assembly have the stress balance point, can prevent the sudden jump of support when releasing the support. Moreover, when the blood vessel support is completely exposed, the locking rings are synchronously separated from the lock catches, so that the blood vessel support can be synchronously released in all directions, the safety is further improved, and the operation risk is reduced. The outer catheter and the inner catheter are locked in a sliding mode through the locking device 8, the locking device is of a locking screw type structure, sliding locking of the outer catheter and the inner catheter is achieved through friction force, and early release of the intravascular stent caused by uncontrolled relative movement of the inner catheter and the outer catheter is prevented. The tail end of the outer conduit is integrally formed with a pull handle 9, and the tail end of the inner conduit is integrally formed with a grab handle 10. The handle is internally provided with a hemostatic valve 15 which is in sealing sliding fit with the inner catheter tube body, and the hemostatic valve is of a rubber sealing ring type structure and prevents blood from flowing out from the gap between the inner catheter and the outer catheter after the stent release device enters the blood vessel of a human body.
As shown in fig. 3, the front end and the rear end of the locking body are integrally formed with a connecting boss 11, and an annular groove 12 is formed between the connecting boss and the locking body, so as to form a stable connection with the support tube and the inner conduit respectively by hot melting or gluing. The lock catch and the lock catch ring are in clearance fit, when the outer catheter is completely withdrawn, the compressed intravascular stent expands axially due to the shape memory function, the lock catch and the lock catch ring are separated from each other, and the stent is released. In addition, a plurality of clamping grooves 16 which are connected with the clamping ring of the intravascular stent in a clamping manner are uniformly formed in the circumferential direction of the outer wall of the locking fastener body, and each locking fastener corresponds to each clamping groove one to one, so that the fixing effect of the intravascular stent can be further improved, and the intravascular stent is favorable for circumferential positioning.
As shown in fig. 4-5, the blood vessel stent 17 is compressed and sleeved on the stent support tube at the front end of the core body, and the stent support tube not only can improve the fixing effect of the blood vessel stent, but also can enable the blood vessel stent to be in a pre-expanded state, which is beneficial to improving the release efficiency. The lock catch ring at the tail end of the blood vessel support is connected with the lock catch on the lock catch body and finally assembled in the inner cavity at the front end of the outer catheter, the assembled blood vessel support can move back and forth along the inner cavity of the outer catheter after the locking device at the tail end of the outer catheter is unscrewed, and the developing indication marks on the support indication ring and the outer catheter can clearly display the relative positions of the support indication ring and the outer catheter under X-rays, so that reference is provided for a doctor to accurately release the support in an operation. When the front end of the conveying device reaches the pathological change position, the compressed vascular stent is gradually exposed and released by moving the outer catheter backwards, and the memory deformation is recovered.
When a doctor operates, a vascular sheath is firstly percutaneously punctured through a blood vessel and then is conveyed to a position near a diseased blood vessel along a guide wire, then the vascular stent release device is conveyed to the position of the diseased blood vessel along the guide wire and a vascular sheath inner cavity under X-ray fluoroscopy, a locking device is opened, a grab handle on an inner catheter is pressed, a pull handle on an outer catheter is pulled to slowly and carefully move the outer catheter backwards in the direction of the tail end of the release device to release the vascular stent, and the accurate positioning of the vascular stent is achieved. The whole release process is simple and convenient, the operation efficiency is effectively improved, and the operation risk is reduced.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. The utility model provides a take release of end thrombus arresting barrier's vascular support which characterized in that: the wire guide device comprises an outer catheter and a core body which are sleeved in a sliding manner, wherein a wire guide cavity is formed in the core body, the core body comprises a support supporting tube, a lock catch body, an inner catheter and a wire guide joint which are connected in sequence, a plurality of lock catches are uniformly arranged on the outer wall of the lock catch body in the circumferential direction, the outer catheter and the inner catheter are locked in a sliding manner through a locking device, a pull handle is arranged at the tail end of the outer catheter, and a grab handle is arranged at; the head end of the outer catheter is provided with a conical head made of elastic soft material; a plurality of clamping grooves which are clamped with the locking ring of the vascular stent are uniformly arranged on the outer wall of the locking fastener body in the circumferential direction; and a developing indicating mark is arranged at the joint of the conical head and the outer catheter.
2. The release device of a stent graft with a distal thrombus arresting net according to claim 1, wherein: the front end and the rear end of the lock catch body are both provided with connecting bosses, an annular groove is formed between each connecting boss and the lock catch body, and the connecting bosses and the lock catch body can be respectively and firmly connected with the support tube and the inner conduit in a hot melting or gluing mode.
3. The release device of a stent graft with a terminal thrombus arresting net according to any one of claims 1 to 2, wherein: the handle is internally provided with a hemostatic valve which is in sealing sliding fit with the inner catheter body.
4. The release device of a stent graft with a distal thrombus arresting net according to claim 3, wherein: the pull handle and the grab handle are respectively integrated with the outer catheter and the inner catheter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801354.4A CN109172077B (en) | 2018-07-20 | 2018-07-20 | Release device of intravascular stent with tail-end thrombus arresting net |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810801354.4A CN109172077B (en) | 2018-07-20 | 2018-07-20 | Release device of intravascular stent with tail-end thrombus arresting net |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109172077A CN109172077A (en) | 2019-01-11 |
| CN109172077B true CN109172077B (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810801354.4A Active CN109172077B (en) | 2018-07-20 | 2018-07-20 | Release device of intravascular stent with tail-end thrombus arresting net |
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| CN (1) | CN109172077B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201445575U (en) * | 2009-04-29 | 2010-05-05 | 天健医疗科技(苏州)有限公司 | Artery tectorial membrane support and conveyer thereof |
| CN102885666A (en) * | 2011-06-10 | 2013-01-23 | 麦克鲁斯内血管有限责任公司 | Lock/floating marker band on pusher wire for self-expanding stents or medical devices |
| WO2014049106A1 (en) * | 2012-09-27 | 2014-04-03 | Symetis Sa | Stent-valve, delivery apparatus, and stent-holder therefor |
| CN105832453A (en) * | 2015-01-31 | 2016-08-10 | 灵活支架解决方案股份有限公司 | Reconstrainable stent delivery system with a proximal stop and an annular lock distal to the proximal stop and method |
| EP2560585B1 (en) * | 2010-04-20 | 2017-06-14 | Medtronic Vascular Inc. | Controlled tip release stent graft delivery system |
| CN108261252A (en) * | 2016-12-30 | 2018-07-10 | 先健科技(深圳)有限公司 | Intraluminal stent and transport system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070198078A1 (en) * | 2003-09-03 | 2007-08-23 | Bolton Medical, Inc. | Delivery system and method for self-centering a Proximal end of a stent graft |
-
2018
- 2018-07-20 CN CN201810801354.4A patent/CN109172077B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201445575U (en) * | 2009-04-29 | 2010-05-05 | 天健医疗科技(苏州)有限公司 | Artery tectorial membrane support and conveyer thereof |
| EP2560585B1 (en) * | 2010-04-20 | 2017-06-14 | Medtronic Vascular Inc. | Controlled tip release stent graft delivery system |
| CN102885666A (en) * | 2011-06-10 | 2013-01-23 | 麦克鲁斯内血管有限责任公司 | Lock/floating marker band on pusher wire for self-expanding stents or medical devices |
| WO2014049106A1 (en) * | 2012-09-27 | 2014-04-03 | Symetis Sa | Stent-valve, delivery apparatus, and stent-holder therefor |
| CN105832453A (en) * | 2015-01-31 | 2016-08-10 | 灵活支架解决方案股份有限公司 | Reconstrainable stent delivery system with a proximal stop and an annular lock distal to the proximal stop and method |
| CN108261252A (en) * | 2016-12-30 | 2018-07-10 | 先健科技(深圳)有限公司 | Intraluminal stent and transport system |
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| Publication number | Publication date |
|---|---|
| CN109172077A (en) | 2019-01-11 |
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