CN114377273A

CN114377273A - Through radial artery access cerebrovascular intervention thimble assembly

Info

Publication number: CN114377273A
Application number: CN202210063592.6A
Authority: CN
Inventors: 胡义平; 张辉; 王晓丽
Original assignee: Nanyang Second General Hospital
Current assignee: Nanyang Second General Hospital
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-04-22

Abstract

The invention discloses a radial artery access cerebrovascular intervention cannula assembly, which comprises: one end of the sheath tube is fixedly connected with a sheath tube seat, and the other end of the sheath tube seat is provided with a gland and a connecting piece; the outer sleeve penetrates through the sheath tube and is connected with the sleeve seat; the inner catheter is wrapped in the outer sleeve and communicated with the catheter seat, and the inner wall of the inner catheter is connected with the guide wire; the guide wire comprises a protective sleeve, a core wire and an electromagnetic block, and two ends of the core wire are respectively connected with a guide wire joint and elasticity; the expansion tube is used for driving the sheath tube to enter a radial artery blood vessel. This through radial artery access cerebral vessels intervention thimble assembly utilizes core silk to connect power and electromagnetism piece, makes the circular telegram of electromagnetism piece produce magnetism, and adjacent electromagnetism piece extrudees the reinforcing wire under magnetic force, makes the slight increase of seal wire pipe diameter, strengthens the connectivity between seal wire and the interior pipe, has improved the cooperation effect.

Description

Through radial artery access cerebrovascular intervention thimble assembly

Technical Field

The invention relates to the technical field related to medical instruments, in particular to a radial artery access cerebrovascular interventional cannula assembly.

Background

As the whole brain angiography is used as the 'gold standard' for the diagnosis and differential diagnosis of cerebrovascular diseases, the puncture path of the whole brain angiography has femoral artery, radial artery and the like, along with the popularization and the popularization of the human intervention technology in the whole world, people find that the complications of the puncture path through the femoral artery are relatively more, and the 24-hour braking is needed after the operation, so that patients often feel greatly inconvenient, while the cerebrovascular angiography performed through the radial artery has the advantages of small injury, less complications, quick recovery, less pain and short hospitalization time.

Because the radial artery is narrower and the path of the cerebral vessels is tortuous by the approach of the radial artery, the ultra-smooth guide wire with smaller size is generally used in the prior art, the resistance of the guide wire when the guide wire passes through the blood vessel is reduced, and in order to ensure that the contrast agent smoothly enters the blood vessel, the smooth inner wall of the catheter can generate high flux, so that the matching effect of the catheter and the guide wire is poorer, the working efficiency is lower, the ultra-smooth guide wire greatly reduces the required pushing force and has very strong passing capability, but the high smoothness also has higher requirement on the operation capability of an operator, and the ultra-smooth guide wire is easy to push too fast to cause vasospasm in the intervention process.

Disclosure of Invention

The invention provides a cerebral vessel interventional cannula assembly through a radial artery access in order to make up for market blank.

The invention aims to provide a radial artery approach cerebrovascular intervention cannula assembly, which solves the problems that in the prior art proposed in the background art, a thin ultra-smooth guide wire is generally used, the resistance of the guide wire during passing through a blood vessel is reduced, high flux can be generated due to smooth inner wall of a catheter in order to enable a contrast agent to smoothly enter the blood vessel, the matching effect of the catheter and the guide wire is poor, the working efficiency is low, the required pushing force is greatly reduced by the ultra-smooth guide wire, the ultra-smooth guide wire has strong passing capacity, but the high smoothness has higher requirement on the operation capacity of an operator, and vasospasm is easily caused due to too fast pushing in the intervention process.

In order to achieve the purpose, the invention provides the following technical scheme: a transradial access cerebrovascular access cannula assembly comprising:

one end of the sheath tube is fixedly connected with a sheath tube seat, the other end of the sheath tube seat is provided with a gland and a connecting piece, and a copper tube is arranged in the gland;

the outer sleeve penetrates through the sheath tube, the outer sleeve is connected with the sleeve seat, and the other end of the outer sleeve is provided with a bent structure;

the inner catheter is wrapped in the outer sleeve and communicated with the catheter seat, and the inner wall of the inner catheter is connected with the guide wire;

the guide wire comprises a protective sleeve, a core wire and electromagnetic blocks, wherein two ends of the core wire are respectively connected with a guide wire joint and an elastic head, the electromagnetic blocks are arranged on the core wire at equal intervals, a reinforcing wire is connected between the electromagnetic blocks, and the reinforcing wire is abutted against the inner wall of the protective sleeve;

the expansion tube is used for driving the sheath tube to enter a radial artery blood vessel.

Furthermore, the connecting piece is arranged between the sheath tube seat and the gland, the side surface of the connecting piece is connected with a side tube, the other end of the side tube is provided with a tee joint, and the tee joint is communicated with the sheath tube through the side tube and the connecting piece.

Furthermore, the gland is of a double-layer structure, the copper pipe is clamped between the inner layer and the outer layer of the gland, the inner layer of the gland surrounds to form a communication port, and the communication port is communicated with the sheath pipe.

Furthermore, the length of the expansion pipe is greater than that of the sheath pipe, one end of the expansion pipe is of a conical structure, the other end of the expansion pipe is connected with a limiting seat, and the width of the limiting seat is greater than the diameter of the communication port.

Further, the outer sleeve, the inner catheter and the guide wire are sequentially nested from outside to inside, and the length of the outer sleeve is far greater than that of the sheath tube.

Furthermore, the material of one end of the inner conduit, which penetrates out of the outer sleeve, is softer than the material of one end of the inner conduit, which is connected with the conduit seat.

Furthermore, one end of the guide wire is fixedly connected with the guide wire connector, an active source and a controller are arranged in the guide wire connector, the power source is connected into the core wire, the core wire is wrapped in the protective sleeve, and the protective sleeve is made of flexible materials.

Furthermore, a plurality of groups of electromagnetic blocks are fixed on the core wire, and a circle of reinforcing wire is connected between every two adjacent electromagnetic blocks.

Further, the elastic head is of an arc-shaped structure, the elastic head is fixed in the inner cavity, the inner cavity is formed in the protective sleeve, and the outer side face of the protective sleeve is covered with a hydrophilic coating.

Compared with the prior art, the invention has the beneficial effects that: the through-radial-artery approach cerebral vessel intervention sleeve pipe assembly is reasonable in structure arrangement, a power supply and an electromagnetic block are connected through a core wire, the electromagnetic block is powered on to generate magnetism, adjacent electromagnetic blocks extrude reinforcing wires under the action of magnetic force, the reinforcing wires act on a protective sleeve, the diameter of a guide wire is slightly increased, the connectivity between the guide wire and an inner catheter is enhanced, the matching effect is improved, meanwhile, when the guide wire is conveyed, the electromagnetic blocks pass through a copper pipe in a gland, the copper pipe generates reaction force on the electromagnetic blocks, the buffering effect is achieved, and vasospasm caused by excessively fast conveying of the guide wire is avoided;

1. one end of the guide wire is connected with a guide wire connector, and a power supply and a controller are arranged in the connector, so that the on-off of current is controlled in the intervention process, and the guide wire can conveniently enter and exit;

2. the outer sleeve and the inner catheter with the bent structures are arranged, so that the supporting effect is enhanced, and the path of the radial artery approach cerebral vessels is met.

Drawings

FIG. 1 is a schematic front view of the structure of the present invention;

FIG. 2 is a schematic view of a sheath according to the present invention;

FIG. 3 is a schematic cross-sectional view of a gland of the present invention;

FIG. 4 is an enlarged partial cross-sectional view of FIG. 1 of the structure of the present invention;

FIG. 5 is an exploded view of the outer sleeve, inner catheter and guidewire of the present invention;

fig. 6 is a cross-sectional view of a guidewire constructed in accordance with the present invention.

In the figure: 1. a sheath tube; 2. an outer sleeve; 3. an inner conduit; 4. a guide wire; 5. an expansion tube; 11. a sheath seat; 12. a gland; 13. a connecting member; 14. a side tube; 15. a tee joint; 16. a copper pipe; 17. a communication port; 21. a cannula holder; 31. a catheter hub; 41. a guidewire junction; 42. a protective sleeve; 43. core filament; 44. reinforcing wires; 45. an electromagnetic block; 46. an inner cavity; 47. an elastic head; 51. a limiting seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows: referring to fig. 1-6, the present invention provides a technical solution: a transradial access cerebrovascular access cannula assembly comprising:

one end of the sheath tube 1 is fixedly connected with a sheath tube seat 11, the other end of the sheath tube seat 11 is provided with a gland 12 and a connecting piece 13, and a copper tube 16 is arranged inside the gland 12;

the outer sleeve 2 penetrates through the sheath tube 1, the outer sleeve 2 is connected with the sleeve seat 21, and the other end of the outer sleeve 2 is provided with a bent structure;

the inner catheter 3 is wrapped in the outer sleeve 2, the inner catheter 3 is communicated with the catheter seat 31, and the inner wall of the inner catheter 3 is connected with the guide wire 4;

the guide wire 4 comprises a protective sleeve 42, a core wire 43 and electromagnetic blocks 45, two ends of the core wire 43 are respectively connected with a guide wire joint 41 and an elastic head 47, the electromagnetic blocks 45 are installed on the core wire 43 at equal intervals, a reinforcing wire 44 is connected between the electromagnetic blocks 45, and the reinforcing wire 44 is abutted against the inner wall of the protective sleeve 42;

the expansion tube 5, the expansion tube 5 is used for driving the sheath tube 1 to enter the radial artery blood vessel.

When the radial artery access cerebral vessel intervention sleeve assembly is used, the dilating tube 5 is utilized to drive the sheath tube 1 to enter a radial artery from a puncture point, the sheath tube seat 11 is fixed at the outer side of the arm of a patient, the dilating tube 5 is pulled out through the limiting seat 51, the guide wire 4 is inserted into the inner catheter 3, the inner catheter 3 is inserted into the outer sleeve 2, the guide wire 4 is pushed inwards along the artery, the power supply is switched on, the electromagnetic block 45 generates magnetic force, when the electromagnetic block 45 passes through the position of the copper tube 16, the copper tube 16 generates reaction force to convey the guide wire 4 to generate resistance, the condition that the guide wire 4 is conveyed inwards too fast is avoided, the power is cut off after the position of the guide wire 4 is fixed, the outer sleeve 2 and the inner catheter 3 are pushed to enter the artery along the guide wire 4, when the port of the inner catheter 3 reaches a target vascular position, the guide wire 4 is withdrawn outwards, a contrast medium is injected into the inner catheter 3 for radiography, after the contrast medium is finished, the guide wire 4 is inserted into the inner catheter 3, the head end of the guide wire 4 slightly penetrates through the inner catheter 3, the power is switched on, the electromagnetic blocks 45 generate magnetic force, the adjacent electromagnetic blocks 45 extrude the reinforcing wire 44, the guide wire 4 is tightly attached to the inner catheter 3, and the guide wire 4 and the inner catheter 3 are prevented from being withdrawn together.

The second embodiment is as follows: as shown in fig. 1 and 2, a connecting member 13 is disposed between the sheath tube seat 11 and the gland 12, a side tube 14 is connected to a side surface of the connecting member 13, a tee 15 is installed at the other end of the side tube 14, the tee 15 is communicated with the sheath tube 1 through the side tube 14 and the connecting member 13, and the tee 15 facilitates the drug delivery into the artery to relieve vasospasm.

The third concrete implementation mode: in this embodiment, as shown in fig. 4, the gland 12 has a double-layer structure, a copper pipe 16 is sandwiched between the inner layer and the outer layer of the gland 12, the inner layer of the gland 12 surrounds to form a communication port 17, the communication port 17 is communicated with the sheath pipe 1, the position of the gland 12 is fixed, the guide wire 4 passes through the gland 12 when entering and exiting the blood vessel, and the electromagnetic block 45 in the guide wire 4 is matched with the copper pipe 16 in the gland 12 to prevent the guide wire 4 from being conveyed too fast, reduce the operation difficulty, and avoid the interaction between the guide wire 4 and the blood vessel.

The fourth concrete implementation mode: the present embodiment is further limited to the first embodiment, the length of the expansion tube 5 is greater than the length of the sheath tube 1, one end of the expansion tube 5 is in a conical structure, the other end of the expansion tube 5 is connected with the limiting seat 51, the width of the limiting seat 51 is greater than the diameter of the communication port 17, and the conical end of the expansion tube 5 conveniently enters the puncture point.

The fifth concrete implementation mode: as shown in fig. 1, 4 and 5, the outer sleeve 2, the inner catheter 3 and the guide wire 4 are sequentially nested from outside to inside, and the length of the outer sleeve 2 is much longer than that of the sheath 1.

The sixth specific implementation mode: in this embodiment, as a further limitation of the first embodiment, the end of the inner catheter 3 extending out of the outer cannula 2 is made of a material softer than the end of the inner catheter 3 connected to the catheter hub 31, so that the inner catheter 3 can enter the target blood vessel.

The seventh embodiment: the embodiment is further limited by the first embodiment, one end of the guide wire 4 is fixedly connected with the guide wire connector 41, the active and controller are arranged in the guide wire connector 41, the power supply is connected with the core wire 43, the core wire 43 is wrapped in the protective sleeve 42, the protective sleeve 42 is made of flexible materials, and the protective sleeve 42 and the elastic head 47 are utilized to reduce the damage of the guide wire 4 to the blood vessel.

The specific implementation mode is eight: as shown in fig. 6, a plurality of groups of electromagnet blocks 45 are fixed on the core wire 43, and a circle of reinforcing wire 44 is connected between two adjacent electromagnet blocks 45, the reinforcing wire 44 not only has a supporting effect, but also the reinforcing wire 44 is deformed under the action of the electromagnet blocks 45, so that the diameter of the guide wire 4 is slightly increased, and the connection between the guide wire 4 and the inner catheter 3 is tighter.

The specific implementation method nine: as shown in fig. 6, the elastic head 47 is in an arc-shaped structure, the elastic head 47 is fixed in the inner cavity 46, the inner cavity 46 is formed inside the protective sleeve 42, the outer side surface of the protective sleeve 42 is covered with a hydrophilic coating, and the coating enables the guide wire 4 to have high smoothness, reduces friction between the blood vessel and the guide wire 4, and facilitates the guide wire 4 to pass through.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A transradial access cerebrovascular access cannula assembly, comprising:

one end of the sheath tube (1) is fixedly connected with a sheath tube seat (11), the other end of the sheath tube seat (11) is provided with a gland (12) and a connecting piece (13), and a copper tube (16) is arranged in the gland (12);

the outer sleeve (2) penetrates through the sheath tube (1), the outer sleeve (2) is connected with the sleeve seat (21), and the other end of the outer sleeve (2) is provided with a bent structure;

the inner catheter (3) is wrapped in the outer sleeve (2), the inner catheter (3) is communicated with the catheter seat (31), and the inner wall of the inner catheter (3) is connected with the guide wire (4);

the guide wire (4) comprises a protective sleeve (42), a core wire (43) and electromagnetic blocks (45), two ends of the core wire (43) are respectively connected with a guide wire joint (41) and an elastic head (47), the electromagnetic blocks (45) are installed on the core wire (43) at equal intervals, reinforcing wires (44) are connected between the electromagnetic blocks (45), and the reinforcing wires (44) are abutted to the inner wall of the protective sleeve (42);

the dilating tube (5) is used for driving the sheath tube (1) to enter a radial artery blood vessel.

2. A transradial access cerebral vascular access cannula assembly as in claim 1, wherein: the sheath tube seat (11) with be provided with between gland (12) connecting piece (13), the side of connecting piece (13) is connected with side pipe (14), just tee bend (15) are installed to the other end of side pipe (14), tee bend (15) pass through side pipe (14) with connecting piece (13) intercommunication sheath pipe (1).

3. A transradial access cerebral vascular access cannula assembly as in claim 1, wherein: the gland (12) is of a double-layer structure, the copper pipe (16) is clamped between the inner layer and the outer layer of the gland (12), the inner layer of the gland (12) surrounds to form a communication port (17), and the communication port (17) is communicated with the sheath pipe (1).

4. A transradial access cerebral vascular access cannula assembly as in claim 1, wherein: the length of expansion pipe (5) is greater than the length of sheath pipe (1), the one end of expansion pipe (5) is the toper structure, spacing seat (51) is connected to the other end of expansion pipe (5), the width of spacing seat (51) is greater than the diameter of intercommunication mouth (17).

5. A transradial access cerebral vascular access cannula assembly as in claim 1, wherein: the outer sleeve (2), the inner catheter (3) and the guide wire (4) are sequentially nested from outside to inside, and the length of the outer sleeve (2) is far greater than that of the sheath (1).

6. A transradial access cerebral vascular access cannula assembly as in claim 1, wherein: the material of one end of the inner conduit (3) penetrating through the outer sleeve (2) is softer than the material of one end of the inner conduit (3) connected with the conduit seat (31).

7. A transradial access cerebral vascular access cannula assembly as in claim 1, wherein: one end of the guide wire (4) is fixedly connected with the guide wire joint (41), an active source and a controller are arranged in the guide wire joint (41), the power source is connected into the core wire (43), the core wire (43) is wrapped in the protective sleeve (42), and the protective sleeve (42) is made of flexible materials.

8. The transradial access cerebrovascular access cannula assembly of claim 7, wherein: a plurality of groups of electromagnetic blocks (45) are fixed on the core wire (43), and a circle of reinforcing wire (44) is connected between every two adjacent electromagnetic blocks (45).

9. The transradial access cerebrovascular access cannula assembly of claim 7, wherein: elasticity head (47) are the arc structure, elasticity head (47) are fixed in inner chamber (46), the inside of protective sheath (42) is formed with inner chamber (46), the lateral surface of protective sheath (42) coats and is stamped hydrophilic coating.