CN120514515A - A vascular stent delivery system and a delivery method thereof - Google Patents
A vascular stent delivery system and a delivery method thereofInfo
- Publication number
- CN120514515A CN120514515A CN202510749700.9A CN202510749700A CN120514515A CN 120514515 A CN120514515 A CN 120514515A CN 202510749700 A CN202510749700 A CN 202510749700A CN 120514515 A CN120514515 A CN 120514515A
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- Prior art keywords
- branch
- main body
- assembly
- bending
- release
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/95—Instruments specially adapted for placement or removal of stents or stent-grafts
- A61F2/954—Instruments specially adapted for placement or removal of stents or stent-grafts for placing stents or stent-grafts in a bifurcation
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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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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
本发明涉及医疗器械技术领域，尤其是指一种血管支架输送系统及其输送方法，其包括血管支架和输送装置，血管支架包括可伸缩管、与可伸缩管的前端连接的主体管以及连接于可伸缩管一侧的若干分支管；输送装置包括手柄组件、主体调弯组件、主体释放组件、分支调弯组件、分支释放组件和外鞘组件；手柄组件包括依次连接的握持手柄、支撑杆和导引头，握持手柄呈中空设置；外鞘组件套设在支撑杆的外周，外鞘组件位于握持手柄和导引头之间。本发明既实现了血管支架植入时调弯的需求，又实现了血管支架各结构的独立释放，且释放方式简便，学习曲线短，整个操作过程避免了深低温停循环，降低了手术难度，降低了对患者的损伤。
The present invention relates to the field of medical device technology, and in particular to a vascular stent delivery system and a delivery method thereof, which includes a vascular stent and a delivery device, wherein the vascular stent includes a telescopic tube, a main body tube connected to the front end of the telescopic tube, and a plurality of branch tubes connected to one side of the telescopic tube; the delivery device includes a handle assembly, a main body bending assembly, a main body release assembly, a branch bending assembly, a branch release assembly, and an outer sheath assembly; the handle assembly includes a gripping handle, a support rod, and a guide head connected in sequence, and the gripping handle is hollow; the outer sheath assembly is sleeved on the outer periphery of the support rod, and the outer sheath assembly is located between the gripping handle and the guide head. The present invention not only meets the need for bending adjustment during implantation of the vascular stent, but also realizes the independent release of each structure of the vascular stent, and the release method is simple, the learning curve is short, and the entire operation process avoids deep hypothermic circulatory arrest, reduces the difficulty of the operation, and reduces damage to the patient.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a vascular stent conveying system and a conveying method thereof.
Background
Stanford a aortic dissection is a fatal cardiovascular emergency with lesions that involve the ascending aorta, with rapid and violent onset. Since the rupture of the intima of the aorta causes blood to flow into the vessel wall to form an interlayer, the death rate is as high as 50% within 48 hours if not treated in time, and the death rate is increased by 1% per hour. The disease is often manifested as sudden severe chest and back pain, which can be accompanied by organ ischemia or shock, about 70% of aortic diseases are dissection, wherein type A accounts for most, and the death rate reaches 62% -91% in one week. The traditional operation has great difficulty, more complications and extremely poor prognosis of patients. Sun's Procedure was created in 2003 by Sun Lizhong, innovating aortic dissection treatment mode and inventing special trunk stent, the core advantage of which is to combine full aortic arch replacement with stent trunk technology, effectively expand the true lumen and close the false lumen by implanting trunk stent, and significantly reduce postoperative complications.
However, existing trunk stents for use in grand's surgery, as well as various stents modified thereof, remain challenging. Firstly, the operation needs to be carried out under the condition of deep low-temperature stop circulation, the technical requirement is extremely high, complications such as brain injury (5.1 percent), renal failure (12.8 percent) and the like can occur in the perioperative period, and secondly, the operation depends on a professional team, the primary hospital is difficult to develop, and the opportunity of rescuing is lost for partial patients due to delayed referral. In order to solve the problem that the trunk stent needs to be used under the deep low-temperature stop cycle, a plurality of domestic researchers propose various solutions, wherein the professor of the extraFu hospital proposes a scheme of adopting a chimney stent, the professor Guo Wei of the 301 hospital proposes a scheme of adopting a modularized support, the professor can be used for treating the Stanford A-type aortic dissection, the two schemes avoid the deep low-temperature stop cycle, a minimally invasive intervention mode is adopted, the treatment purpose can be achieved, but the two schemes of the main stent and the branch stent are both easy to displace and leak in the re-matching process of the two stents, thereby causing postoperative complications and being incapable of replacing the surgical treatment of the complex Stanford A-type aortic dissection.
The improved trunk stent is represented by a multi-branch stent, as shown in the following figure 1, and comprises a main body stent 1, a branch stent 2 and a suture vessel 3, wherein the stent has the problems that when in use and after implantation, the part A at the top of the branch stent 2 is easy to cause internal leakage due to poor adhesion, so that postoperative complications are caused, the part B at the root of the branch stent 2 is relatively fixed, so that the branch stent 2 is difficult to adapt to the branch vessel of a patient when in implantation, and is easy to shift and deviate from the branch vessel, the operation is carried out under the condition of deep low-temperature stop circulation, but the stent does not have vessels for perfusion, the external circulation mode is limited in the operation process, the problem of inconvenience is easily caused, the part C at the far end of the main body stent is not easy to carry out secondary operation, the whole operation still needs to be completed under the condition of deep low-temperature stop circulation, the damage to the body of the patient is still large, and the postoperative complications are still more.
In the minimally invasive interventional therapy scheme, as shown in the 'chimney bracket' technology shown in fig. 2, the scheme adopts a main body bracket A and a chimney bracket B parallel to the main body bracket for therapy, but because of a split structure between the two brackets, the scheme is easy to shift the brackets and the joint of the two brackets is easy to leak inwards.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a vascular stent conveying system and a conveying method thereof, which are ingenious in design, solve the problems of internal leakage, displacement and the like of the vascular stent, realize the suitability of the branch spacing and the vascular spacing of a patient, simultaneously consider the requirement of secondary operation and the requirement of extracorporeal circulation perfusion, and completely avoid the deep low-temperature stop circulation process.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention provides a vascular stent conveying system, which comprises a vascular stent and a conveying device, wherein the vascular stent comprises a telescopic pipe, a main body pipe connected with the front end of the telescopic pipe and a plurality of branch pipes connected to one side of the telescopic pipe;
the conveying device comprises a handle assembly, a main body bending adjusting assembly, a main body releasing assembly, a branch bending adjusting assembly, a branch releasing assembly and an outer sheath assembly;
the handle assembly comprises a holding handle, a supporting rod and a guide head which are sequentially connected, and the holding handle is arranged in a hollow manner; the outer sheath component is sleeved on the periphery of the supporting rod and is positioned between the holding handle and the guide head, and the holding handle is hollow;
the main body bending adjusting assembly is used for adjusting bending of the supporting rod;
The main body release component is used for compressing the vascular stent on the supporting rod or releasing the vascular stent, and the vascular stent is pulled into the outer sheath component when the vascular stent is compressed by the main body release component;
the branch bending adjusting component is used for adjusting bending of the branch pipe of the vascular stent;
the branch release assembly is used for binding with the branch pipe of the vascular stent and compressing or releasing the branch pipe.
The main body bending adjusting assembly comprises a main body bending adjusting steel cable and a main body bending adjusting knob, one end of the main body bending adjusting steel cable is connected with the main body bending adjusting knob, the other end of the main body bending adjusting steel cable penetrates through an inner cavity of the supporting rod to be connected with the head end of the supporting rod, and the main body bending adjusting knob is movably sleeved on the periphery of the holding handle.
The main body release assembly comprises a main body release guide wire and a main body release handle, one end of the main body release guide wire is connected with the main body release handle, the other end of the main body release guide wire penetrates through the holding handle and then extends to the support rod, the other end of the main body release guide wire is bound with the blood vessel support from the outer side of the blood vessel support and compresses the blood vessel support on the support rod, and the main body release handle is movably sleeved on the periphery of the holding handle.
The branch bending adjusting assembly comprises a branch bending adjusting steel cable and a branch bending adjusting knob, one end of the branch bending adjusting steel cable is connected with the branch bending adjusting knob, the other end of the branch bending adjusting steel cable sequentially penetrates through the holding handle, the telescopic pipe and the branch pipe and is positioned in the branch pipe, and the branch bending adjusting knob is movably sleeved on the periphery of the holding handle.
The branch release assembly comprises a branch release guide wire and a branch release handle, one end of the branch release guide wire is connected with the branch release handle, the other end of the branch release guide wire sequentially penetrates through the holding handle, the telescopic pipe and the branch pipe and then is bound with the outer side of the branch pipe, and the branch release handle is movably sleeved on the periphery of the holding handle.
The outer sheath assembly comprises an outer sheath tube and an outer sheath handle, the outer sheath handle is arranged at one end of the outer wall of the outer sheath tube, the outer sheath tube is sleeved on the periphery of the supporting rod, one end of the outer sheath tube is connected with the holding handle, and the other end of the outer sheath tube is connected with the guide head.
Wherein, the outer sheath tube is a thin-walled lumen structure.
The telescopic tube comprises a main telescopic tube body and a branch telescopic tube body, wherein the branch telescopic tube body is connected to one side of the main telescopic tube body and is communicated with the main telescopic tube body, the main tube comprises a main body membrane and a plurality of main body metal rings, the branch tube comprises a branch membrane and a plurality of branch metal rings, one end of the main telescopic tube body is connected with the main body membrane, the plurality of main body metal rings are wound on the outer peripheral wall/inner peripheral wall of the main body membrane at equal intervals along the length direction of the vascular stent, the outer peripheral wall/inner peripheral wall of the main telescopic tube body is connected to the other side of the main telescopic tube body, and the branch metal rings are wound on the outer peripheral wall/inner peripheral wall of the branch membrane.
Preferably, the main body membrane and the branch membrane are both provided in a tubular shape.
The invention also provides a vascular stent conveying method based on the vascular stent conveying system, which comprises the following steps:
s1, after extracorporeal circulation is established, a small opening is cut in the ascending aorta or aortic arch of a patient and a purse is made, and a guide sheath with a sealing function is placed in the small opening;
s2, respectively guiding branch release guide wires in the branch pipes into branch blood vessels under the guidance of ultrasonic guidance/DSA;
S3, slowly pushing a conveying system with a vascular stent to be implanted into an expected lesion position through a guide sheath;
S4, removing the outer sheath assembly, and integrally releasing the blood vessel support in a contracted shape;
S5, slowly guiding the main body pipe and the main telescopic pipe body to enter corresponding blood vessels respectively through the main body bending adjusting assembly, and slowly guiding the branch pipe to enter the corresponding blood vessels through the branch bending adjusting assembly;
s6, releasing the main body pipe and the main body telescopic pipe through the main body release assembly, and sequentially releasing the branch pipes through the branch release assembly;
s7, withdrawing the conveying system, and simultaneously transferring the arterial perfusion tube of the extracorporeal circulation to a branch telescopic tube body on the vascular stent;
S8, blocking the main telescopic pipe body at the proximal end of the branch telescopic pipe body by using a vascular blocking clamp, and anastomosing the ascending aorta with the free end of the main telescopic pipe body on the vascular stent after traversing the ascending aorta;
s9, stopping extracorporeal circulation after the operation is completed, and recovering the autologous circulation of the patient.
The invention has the beneficial effects that:
The invention has ingenious design, solves the problems of internal leakage, displacement and the like of the vascular stent, can realize the suitability of the branch spacing and the vascular spacing of a patient, simultaneously takes into account the requirement of secondary operation and the requirement of extracorporeal circulation perfusion, and completely avoids the deep low-temperature stop circulation process.
Drawings
FIG. 1 is a schematic view of a prior art improved trunk stent in the form of a multi-branched stent.
Fig. 2 is a schematic structural view of a chimney bracket in the prior art.
Fig. 3 is a schematic structural view of a stent delivery system according to the present invention.
Fig. 4 is a schematic structural view of the conveying device of the present invention.
Fig. 5 is a schematic view of the structure of the delivery device of the present invention after concealing the sheath assembly.
Fig. 6 is a schematic structural view of the main body bending adjusting component and the main body releasing component of the present invention respectively matched with a vascular stent.
Fig. 7 is a schematic structural view of the branch release assembly and the branch bending adjustment assembly of the present invention respectively matched with a vascular stent.
Fig. 8 is a schematic structural view of the outer sheath assembly of the present invention.
Fig. 9 is a schematic view showing a state in which the stent of the present invention is delivered by a delivery device.
The reference numerals in fig. 1 to 9 include:
1. a main body bracket, a branch bracket, a 3, a suture vessel;
10. a telescopic tube; 11, a main body pipe 12, a branch pipe;
100. 101, branch extension tube body;
110. Main body membrane, 111, main body metal ring, 120, branch membrane, 121, branch metal ring, 122, spring support tube;
21. Branch release assembly, 22, branch bending adjustment assembly, 24, handle assembly, 25, main body bending adjustment assembly, 26, outer sheath assembly, 27, guide head, 28, main body release assembly;
211. a branch release guidewire 212, a branch release handle;
221. a branch bending adjustment steel cable 222, a branch bending adjustment handle;
240. A handle 241 and a support rod;
251. a main body bending steel cable 252, a main body bending handle;
261. 262, an outer sheath handle;
281. the body releases the guidewire 282, the body releases the handle.
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 fall within the scope of the invention. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. The connection relationships shown in the drawings are for convenience of clarity of description only and are not limiting on the manner of connection.
It is noted that when one component is considered to be "connected" to another component, it may be directly connected to the other component, or intervening components may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, or in communication between two elements, unless explicitly stated or otherwise. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
It should be further noted that, in the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are based on directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
As shown in fig. 3 to 9, a stent delivery system comprising a stent and a delivery device, the stent comprising a telescoping tube 10, a main tube 11 connected to the front end of the telescoping tube 10, and a plurality of branch tubes 12 connected to one side of the telescoping tube 10, wherein the telescoping tube 10 is a tubular structure with bellows, having a telescoping function in the axial direction, the distal end of the main tube 11 is provided with a suture edge for facilitating suturing of a secondary operation;
The telescopic tube 10 comprises a main telescopic tube body 100 and a branch telescopic tube body 101, wherein the branch telescopic tube body 101 is connected to one side of the main telescopic tube body 100 and is communicated with the main telescopic tube body 100, the main tube 11 comprises a main body membrane 110 and a plurality of main body metal rings 111, the branch tube 12 comprises a branch membrane 120 and a plurality of branch metal rings 121, one end of the main telescopic tube body 100 is connected with the main body membrane 110, the plurality of main body metal rings 111 are arranged at equal intervals in a row along the length direction of a vascular stent around the outer peripheral wall/inner peripheral wall of the main body membrane 110 and the outer peripheral wall/inner peripheral wall of the main telescopic tube body 100, the branch membrane 120 is connected to the other side of the main telescopic tube body 100, and the branch metal rings 121 are arranged around the outer peripheral wall/inner peripheral wall of the branch membrane 120;
The main body tube 11 is used for reconstructing descending aorta of a patient in an operation process, the main body membrane 110 of the main body tube 11 is of a tubular structure, one end of the main body membrane 110 is fixedly connected with the main telescopic tube body 100, the other end of the main body membrane is of a free end, the main body metal ring 111 is of a closed annular structure made of metal materials and has a certain radial supporting force, each main body metal ring 111 is of an independent annular structure, the main body metal rings 111 are not connected with each other, the main body metal rings 111 are fixed on the inner side or the outer side of the main body membrane 110, or the main body metal rings 111 are clamped between the main body metal rings 110 in a sandwich structure, the main body metal rings 111 are uniformly distributed along the axial direction of the main body membrane 110, the length of the main body membrane 110 exceeds the length L of the last main body metal ring 111 at the free end of the main body membrane 110 to serve as a suture edge to facilitate the operation of secondary operation, and in particular, the main body metal rings 111 of the main body metal ring 111 are also arranged on one end close to the main body membrane 110 and are not connected;
The branch pipe 12 is used for reconstructing branch vessels on an aortic arch, the structure of the branch pipe 12 is similar to that of the main pipe 11, the branch pipe 12 comprises a branch film 120 and branch metal rings 121, the branch film 120 is fixedly connected with the main telescopic pipe body 100, the branch metal rings 121 are arranged on the inner side or the outer side of the branch film 120, or the double-layer branch film 120 clamps the branch metal rings 121 in the middle to form a sandwich structure, the two positions are relatively fixed, the branch pipe 12 is perpendicular to the main telescopic pipe body 100 and is arranged on the main telescopic pipe body 100, the branch pipe 12 and the main telescopic pipe body 100 are completely communicated, blood passing through the main telescopic pipe body 100 can be directly supplied to other parts through the branch pipe 12, the number of the branch pipes 12 can be 1,2 or 3, the main telescopic pipe bodies 100 below each branch pipe 12 are respectively provided with the main metal rings 111, and the number of the main metal rings 111 is the same as that of the branch pipe 12 and is positioned right below the branch pipe 12. The two purposes are that the main body metal ring 111 can be used for supporting the branch pipe 12, the branch pipe 12 is ensured to be completely positioned in a branch blood vessel and is not shifted, and the main telescopic pipe body 100 can drive the branch pipe 12 to move due to the axial retractility, so that the distance between two adjacent branch pipes 12 can be adjusted, and the branch pipe 12 can be better matched with the branch blood vessel. In particular, the top end of the branch pipe 12 is provided with a circle of velvet-shaped PET cloth, the inner side of the PET cloth is also provided with a branch metal ring 121, the PET cloth can be used as an inner leakage preventing structure, and after the branch pipe 12 is implanted into a branch vessel, the PET cloth can be perfectly attached to the branch vessel to prevent the occurrence of inner leakage of blood.
In an embodiment of the present application, the delivery device comprises a handle assembly 24, a body bending assembly 25, a body releasing assembly 28, a branch bending assembly 22, a branch releasing assembly 21 and a sheath assembly 26;
The handle assembly 24 comprises a holding handle 240, a supporting rod 241 and a guide head 27 which are sequentially connected, wherein the holding handle 240 is arranged in a hollow mode, the outer sheath assembly 26 is sleeved on the periphery of the supporting rod 241, the outer sheath assembly 26 is positioned between the holding handle 240 and the guide head 27, the holding handle 240 is arranged in a hollow mode, the outer sheath assembly 26 comprises an outer sheath tube 261 and an outer sheath handle 262, the outer sheath handle 262 is arranged at one end of the outer wall of the outer sheath tube 261, the outer sheath tube 261 is sleeved on the periphery of the supporting rod 241, one end of the outer sheath tube 261 is connected with the holding handle 240, and the other end of the outer sheath tube 261 is connected with the guide head 27, and the outer sheath tube 261 is of a thin-wall tube cavity structure;
the main body bending adjusting assembly 25 is used for adjusting bending of the supporting rod 241, wherein the main body bending adjusting assembly 25 comprises a main body bending steel cable 251 and a main body bending knob, one end of the main body bending steel cable 251 is connected with the main body bending knob, the other end of the main body bending steel cable 251 penetrates through an inner cavity of the supporting rod 241 to be connected with the head end of the supporting rod 241, and the main body bending knob is movably sleeved on the periphery of the holding handle 240;
The main body release assembly 28 is used for compressing the vascular stent on the support rod 241 or releasing the vascular stent, the vascular stent is pulled into the outer sheath assembly 26 when the vascular stent is compressed by the main body release assembly 28, the main body release assembly 28 comprises a main body release guide wire 281 and a main body release handle 282, one end of the main body release guide wire 281 is connected with the main body release handle 282, the other end of the main body release guide wire 281 extends to the support rod 241 after passing through the holding handle 240, the other end of the main body release guide wire 281 is bound with the vascular stent from the outer side of the vascular stent and compresses the vascular stent on the support rod 241, and the main body release handle 282 is movably sleeved on the periphery of the holding handle 240;
the branch bending adjusting assembly 22 is used for adjusting bending of the branch pipe 12 of the vascular stent, the branch bending adjusting assembly 22 comprises a branch bending adjusting steel cable 221 and a branch bending adjusting knob, one end of the branch bending adjusting steel cable 221 is connected with the branch bending adjusting knob, the other end of the branch bending adjusting steel cable 221 sequentially passes through the holding handle 240, the telescopic pipe 10 and the branch pipe 12 and is positioned in the branch pipe 12, and the branch bending adjusting knob is movably sleeved on the periphery of the holding handle 240;
The branch release assembly 21 is used for binding with the branch pipe 12 of the vascular stent and compressing or releasing the branch pipe 12, the branch release assembly 21 comprises a branch release guide wire 211 and a branch release handle 212, one end of the branch release guide wire 211 is connected with the branch release handle 212, the other end of the branch release guide wire 211 sequentially passes through the holding handle 240, the telescopic pipe 10 and the branch pipe 12 and then is bound with the outer side of the branch pipe 12, and the branch release handle 212 is movably sleeved on the periphery of the holding handle 240.
Specifically, the holding handle 240 is provided with a cavity inside for passing various wires and guide wires, the head end of the supporting rod 241 is provided with threads, and the guide head 27 is connected with the head end of the supporting rod 241 through the threads, the supporting rod 241 is made of a common polymer material such as PE or PP, and has certain hardness but also has a bendable function;
the branch pipe 12 further includes a spring support tube 122, the spring support tube 122 being a metal braid having a hardness and having a lumen of a certain size that flexes when subjected to a force. One end of the spring support tube 122 is fixedly connected with the branch bending adjusting knob, the other end of the spring support tube extends to the support rod 241 and extends out of the branch tube 12 of the vascular stent to play a certain supporting role on the branch tube 12, one end of the branch bending adjusting steel cable 221 is also connected with the branch bending adjusting knob, the other end of the branch bending adjusting steel cable is fixed at the head end of the spring support tube 122 through an inner cavity of the spring support tube 122, and the bending adjusting function of the spring support tube 122 arranged in the branch tube 12 of the vascular stent can be realized by rotating the branch bending adjusting knob.
In the embodiment of the application, the branch bending adjusting assemblies 22 and the branch releasing assemblies 21 are respectively provided with 3 mutually independent structures, and the actual use number of the branch bending adjusting assemblies is corresponding to the number of the branch pipes 12 of the vascular stent;
After the main body release guide wire 281 and the branch release guide wire 211 are used for compressing the main body tube 11, the main body telescopic tube 10 and the branch tube 12 of the vascular stent, the vascular stent is integrally contracted into the lumen of the outer sheath 261, the outer sheath 261 is of a thin-wall lumen structure and is made of a common polymer material, and is mainly characterized in that the whole sheath can be torn by slightly pulling a pull ring at one end of the sheath, the whole sheath is formed into an open annular structure by a closed annular structure, the state of the vascular stent in a conveying system is shown in fig. 9, the outer sheath assembly 26 is preferably a tearable sheath, and the vascular stent can be integrally compressed on the supporting rod 241.
When the device is used, a small opening is cut at the ascending aorta or aortic arch of a patient and a purse is made, a guide sheath with a sealing function is placed, guide wires arranged in the branch pipe 12 are respectively guided into branch vessels under the guidance of ultrasonic guidance/DSA, a conveying system with the vascular stent is slowly pushed to be implanted to a position with expected pathological changes through the guide sheath, an outer sheath 261 is removed, the vascular stent in a contracted shape is integrally released, the main body pipe 11 comprises the main body telescopic pipe 10 and the branch pipe 12 are respectively led into corresponding vessels through a main body bending component 25 and a branch bending component 22, the main body pipe 11 and the main body telescopic pipe 10 are released through a main body releasing component 28, the branch pipes 12 are sequentially released through a branch releasing component 21, a conveyor is withdrawn, meanwhile, an arterial perfusion pipe in vitro circulation is transferred onto the branch telescopic pipe 10 on the vascular stent, after the main body telescopic pipe 10 at the proximal end of the branch telescopic pipe 10 is blocked by using a vascular blocking clamp and the ascending aorta and the free end of the main body telescopic pipe 10 on the vascular stent is transversely cut off, after the operation is completed, the extracorporeal circulation is stopped, and the self-circulation of the patient is recovered, so that therapeutic effect is achieved. The embodiment of the application has ingenious design, solves the problems of internal leakage, displacement and the like of the vascular stent, can realize the suitability of the branch spacing and the vascular spacing of a patient, simultaneously meets the requirements of secondary operation and extracorporeal circulation perfusion, and completely avoids the deep low-temperature stop circulation process, and the design of the conveying system not only realizes the bending adjustment requirement during the implantation of the vascular stent, but also realizes the independent release of each structure of the vascular stent, and has simple and convenient release mode and short learning curve, the whole operation process avoids the deep low-temperature stop circulation, reduces the operation difficulty and reduces the damage to the patient.
Example two
The second embodiment of the application provides a vascular stent conveying method based on the vascular stent conveying system, which comprises the following steps:
s1, after extracorporeal circulation is established, a small opening is cut in the ascending aorta or aortic arch of a patient and a purse is made, and a guide sheath with a sealing function is placed in the small opening;
s2, respectively guiding the branch release guide wires 211 in the branch pipes 12 into the branch blood vessels under the guidance of ultrasonic guidance/DSA;
S3, slowly pushing a conveying system with a vascular stent to be implanted into an expected lesion position through a guide sheath;
S4, removing the outer sheath assembly 26, and integrally releasing the blood vessel support in a contracted state;
s5, slowly guiding the main body tube 11 and the main telescopic tube body 100 to enter corresponding blood vessels respectively through the main body bending component 25, and slowly guiding the branch tube 12 to enter the corresponding blood vessels through the branch bending component 22;
s6, releasing the main body pipe 11 and the main body telescopic pipe 10 through the main body release assembly 28, and sequentially releasing the branch pipes 12 through the branch release assembly 21;
s7, withdrawing the conveying system, and simultaneously transferring an arterial perfusion tube of the extracorporeal circulation to a branch telescopic tube body 101 on the vascular stent;
s8, using a vascular occlusion clamp to block the main telescopic tube body 100 at the proximal end of the branch telescopic tube body 101, and after traversing the ascending aorta, anastomosing the ascending aorta with the free end of the main telescopic tube body 100 on the vascular stent;
s9, stopping extracorporeal circulation after the operation is completed, and recovering the autologous circulation of the patient.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that the present invention is not limited thereto, and that the invention is not limited thereto, but is intended to be limited thereto, when the technical content disclosed above is utilized to make a little change or modification into equivalent embodiments of equivalent changes, but the technical content of the invention is not deviated from, any simple modification, equivalent changes and modification of the above embodiments are all within the scope of the technical solution of the invention.
Claims (10)
1. The vascular stent conveying system is characterized by comprising a vascular stent and a conveying device, wherein the vascular stent comprises a telescopic pipe, a main body pipe connected with the front end of the telescopic pipe and a plurality of branch pipes connected to one side of the telescopic pipe;
the conveying device comprises a handle assembly, a main body bending adjusting assembly, a main body releasing assembly, a branch bending adjusting assembly, a branch releasing assembly and an outer sheath assembly;
the handle assembly comprises a holding handle, a supporting rod and a guide head which are sequentially connected, and the holding handle is arranged in a hollow manner; the outer sheath component is sleeved on the periphery of the supporting rod and is positioned between the holding handle and the guide head, and the holding handle is hollow;
the main body bending adjusting assembly is used for adjusting bending of the supporting rod;
The main body release component is used for compressing the vascular stent on the supporting rod or releasing the vascular stent, and the vascular stent is pulled into the outer sheath component when the vascular stent is compressed by the main body release component;
the branch bending adjusting component is used for adjusting bending of the branch pipe of the vascular stent;
the branch release assembly is used for binding with the branch pipe of the vascular stent and compressing or releasing the branch pipe.
2. The vascular stent delivery system of claim 1, wherein the main body bending assembly comprises a main body bending steel cable and a main body bending knob, one end of the main body bending steel cable is connected with the main body bending knob, the other end of the main body bending steel cable penetrates through the inner cavity of the supporting rod to be connected with the head end of the supporting rod, and the main body bending knob is movably sleeved on the periphery of the holding handle.
3. The stent delivery system of claim 1, wherein the main body release assembly comprises a main body release guide wire and a main body release handle, one end of the main body release guide wire is connected with the main body release handle, the other end of the main body release guide wire penetrates through the holding handle and then extends to the supporting rod, the other end of the main body release guide wire is bound with the stent from the outer side of the stent and compresses the stent on the supporting rod, and the main body release handle is movably sleeved on the periphery of the holding handle.
4. The vascular stent delivery system of claim 1, wherein the branch bending adjustment assembly comprises a branch bending adjustment steel cable and a branch bending adjustment knob, one end of the branch bending adjustment steel cable is connected with the branch bending adjustment knob, the other end of the branch bending adjustment steel cable sequentially passes through the holding handle, the telescopic pipe and the branch pipe and is positioned in the branch pipe, and the branch bending adjustment knob is movably sleeved on the periphery of the holding handle.
5. The vascular stent delivery system of claim 1, wherein the branch release assembly comprises a branch release guide wire and a branch release handle, one end of the branch release guide wire is connected with the branch release handle, the other end of the branch release guide wire sequentially passes through the holding handle, the telescopic tube and the branch pipe and then is bound with the outer side of the branch pipe, and the branch release handle is movably sleeved on the periphery of the holding handle.
6. The vascular stent delivery system of claim 1, wherein the sheath assembly comprises a sheath tube and a sheath handle, the sheath handle is disposed at one end of the outer wall of the sheath tube, the sheath tube is sleeved on the outer periphery of the support rod, one end of the sheath tube is connected with the grip handle, and the other end of the sheath tube is connected with the introducer.
7. The stent delivery system of claim 6, wherein the outer sheath is a thin walled lumen structure.
8. The stent delivery system of claim 1, wherein the telescoping tube comprises a main telescoping tube body and a branch telescoping tube body, the branch telescoping tube body is connected to one side of the main telescoping tube body and is communicated with the main telescoping tube body, the main tube comprises a main body membrane and a plurality of main body metal rings, the branch tube comprises a branch membrane and a plurality of branch metal rings, one end of the main telescoping tube body is connected with the main body membrane, the plurality of main body metal rings are wound on the outer peripheral wall/inner peripheral wall of the main body membrane and the outer peripheral wall/inner peripheral wall of the main telescoping tube body at equal intervals along the length direction of the stent, the branch membrane is connected to the other side of the main telescoping tube body, and the branch metal rings are wound on the outer peripheral wall/inner peripheral wall of the branch membrane.
9. A vascular stent delivery system as defined in claim 8, wherein the main body membrane and the branch membrane are each configured in a tubular shape.
10. A stent delivery method based on the stent delivery system of any one of claims 1-9, comprising the steps of:
s1, after extracorporeal circulation is established, a small opening is cut in the ascending aorta or aortic arch of a patient and a purse is made, and a guide sheath with a sealing function is placed in the small opening;
s2, respectively guiding branch release guide wires in the branch pipes into branch blood vessels under the guidance of ultrasonic guidance/DSA;
S3, slowly pushing a conveying system with a vascular stent to be implanted into an expected lesion position through a guide sheath;
S4, removing the outer sheath assembly, and integrally releasing the blood vessel support in a contracted shape;
S5, slowly guiding the main body pipe and the main telescopic pipe body to enter corresponding blood vessels respectively through the main body bending adjusting assembly, and slowly guiding the branch pipe to enter the corresponding blood vessels through the branch bending adjusting assembly;
s6, releasing the main body pipe and the main body telescopic pipe through the main body release assembly, and sequentially releasing the branch pipes through the branch release assembly;
s7, withdrawing the conveying system, and simultaneously transferring the arterial perfusion tube of the extracorporeal circulation to a branch telescopic tube body on the vascular stent;
S8, blocking the main telescopic pipe body at the proximal end of the branch telescopic pipe body by using a vascular blocking clamp, and anastomosing the ascending aorta with the free end of the main telescopic pipe body on the vascular stent after traversing the ascending aorta;
s9, stopping extracorporeal circulation after the operation is completed, and recovering the autologous circulation of the patient.
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| CN202510749700.9A CN120514515A (en) | 2025-06-06 | 2025-06-06 | A vascular stent delivery system and a delivery method thereof |
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| CN202510749700.9A CN120514515A (en) | 2025-06-06 | 2025-06-06 | A vascular stent delivery system and a delivery method thereof |
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