CN111282134B

CN111282134B - Flexible reinforced neurovascular catheter structure

Info

Publication number: CN111282134B
Application number: CN202010196633.XA
Authority: CN
Inventors: 张凌云
Original assignee: Nanjing Puweisen Medical Technology Co ltd
Current assignee: Nanjing Puweisen Medical Technology Co ltd
Priority date: 2020-03-19
Filing date: 2020-03-19
Publication date: 2022-09-16
Anticipated expiration: 2040-03-19
Also published as: CN111282134A

Abstract

The invention belongs to the technical field of neurovascular catheters, and particularly relates to a flexibly-enhanced neurovascular catheter structure which is long and comprises an outer tube body and an inner tube body, wherein the inner tube body is inserted into the outer tube body, one end of the inner tube body is positioned outside the outer tube body, the outer tube body and the inner tube body are both made of flexible reinforced tubes, one end of the inner tube body, which is connected with the inner tube body, inside the outer tube body is provided with a first limiting retaining shoulder, a limiting retaining ring is sleeved on the outer wall of the inner tube body, which is positioned at one end of an inner cavity of the outer tube body, and through the split design between the outer tube body and the inner tube body, the occupied space is small, so that the contraction and insertion effects are convenient, and the inner tube body can be avoided due to the matching effect of the first limiting retaining shoulder and the limiting retaining ring; the outer pipe body and the inner pipe body are both made of flexible reinforced pipes, so that the flexibility is good, and the situations of pipeline creases and pipeline closure are not easy to occur.

Description

Flexible reinforced neurovascular catheter structure

Technical Field

The invention relates to the technical field of neurovascular catheters, in particular to a neurovascular catheter structure with enhanced flexibility.

Background

The neurovascular unit has a neuron-glial cell-vascular structure, and includes neurons, astrocytes, microglia, vascular endothelial cells, perivascular cells, basement membrane, and extracellular matrix. In recent years, along with the deep research of neuroscience, neurovascular unit (NVU) receives more and more attention.

The neurovascular unit maintains the normal physiological function of neurons and repair of damaged neurons. The concept is proposed to treat nerve cell damage caused by different causes as a tissue damage process in which all cellular and matrix components of the brain are involved.

Approximately 700,000 patients suffer from a stroke annually. Cerebral stroke is a syndrome characterized by an acute onset of neurologic deficit lasting at least 24 hours, reflecting focal involvement of the central nervous system and being the result of cerebral circulatory disorders. Its incidence increases with age. Risk factors for cerebral stroke include systolic or diastolic hypertension, hypercholesterolemia, smoking, alcohol abuse, and oral contraceptives.

Usually need adopt neural intervention treatment, current pipe pliability is not good, buckles and causes the condition of pipeline closure even crease easily, is difficult to cause the damage to the pipe easily like this, influences the normal clear of treatment.

Disclosure of Invention

The invention aims to provide a neurovascular catheter structure with enhanced flexibility, which aims to solve the problems that the existing catheter in the background art has poor flexibility, is easy to cause pipeline closure and even crease during bending, is not easy to damage the catheter and influences the normal operation of treatment.

In order to achieve the purpose, the invention provides the following technical scheme: a flexible reinforced neurovascular catheter structure is in a long strip shape and comprises an outer tube and an inner tube, wherein the inner tube is inserted into the outer tube, one end of the inner tube is positioned outside the outer tube, the outer tube and the inner tube are both made of flexible reinforced tubes, a first limiting retaining shoulder is arranged at one end, connected with the inner tube, inside the outer tube, a limiting retaining ring is sleeved on the outer wall of the inner tube positioned at one end of an inner cavity of the outer tube, a second limiting retaining shoulder is arranged at one end, away from the outer tube, of the inner cavity of the inner tube, and a through hole is formed in the middle of the inner cavity of the inner tube, away from one end of the outer tube, and positioned at the middle of the second limiting retaining shoulder;

the outer pipe body and the inner pipe body respectively comprise an outer pipe layer, an inner pipe layer and a flexible reinforcing layer, the flexible reinforcing layer is coated on the outer wall of the inner pipe layer, the flexible reinforcing layer is embedded between the outer pipe layer and the inner pipe layer, the flexible reinforcing layer is a winding coil, and the winding coil is a copper metal wire winding coil.

Preferably, the outer wall of one end of the outer pipe body, which is in contact with the inner pipe body, is arc-surface-shaped, one end of the inner pipe body, which is positioned outside the outer pipe body, is arc-surface-shaped, and the arc surface of the end part of the outer pipe body is in contact with the arc surface of the end part of the inner pipe body to form a hemispherical surface.

Preferably, the total length of the combination of the outer and inner tubes is 70-120 cm.

Preferably, a rigid reinforcing handle is arranged on the outer wall of one end of the outer pipe body, which is far away from the inner pipe body.

Preferably, the diameter of the inner wall of the outer tube body is the same as that of the outer wall of the limiting retainer ring.

Compared with the prior art, the invention has the beneficial effects that:

1) through the split design between the outer pipe body and the inner pipe body, the occupied space is small, the contraction and imbedding actions are convenient, and the inner pipe body can be avoided through the matching action of the first limiting retaining shoulder and the limiting retaining ring;

2) the outer pipe body and the inner pipe body are both made of flexible reinforced pipes, so that the flexibility is good, and the situations of pipeline creases and pipeline closure are not easy to occur.

Drawings

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

FIG. 2 is a schematic cross-sectional view of the joint between the outer and inner tubes according to the present invention;

fig. 3 is a schematic cross-sectional view of the inner tube body of the present invention.

In the figure: the pipe comprises an outer pipe body 1, an inner pipe body 2, a rigid reinforcing handle 3, a first limiting retaining shoulder 4, a limiting retaining ring 5, a second limiting retaining shoulder 6 and a through hole 7.

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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Example (b):

referring to fig. 1-3, the present invention provides a technical solution: a flexible enhanced neurovascular catheter structure which is in a long strip shape and comprises an outer tube body 1 and an inner tube body 2, wherein the inner tube body 2 is inserted into the outer tube body 1;

the inner tube body 2 can move in the outer tube body 1, so that the total length of the inner tube body 2 and the outer tube body 1 is prolonged or shortened, the adjustment effect is realized, the insertion into a blood vessel of a patient is facilitated, and the pain is reduced;

one end of the inner tube 2 is positioned outside the outer tube 1, the outer tube 1 and the inner tube 2 are both made of flexible reinforced tubes, a first limiting retaining shoulder 4 is arranged at one end of the inner tube 1 connected with the inner tube 2, and a limiting retaining ring 5 is sleeved on the outer wall of the inner tube 2 positioned at one end of the inner cavity of the outer tube 1;

the first limit retaining shoulder 4 has a limiting function on the limit retaining ring 5, so that the inner pipe body 2 cannot be separated from the outer pipe body 1;

the one end that the outer body 1 was kept away from to interior body 2 inner chamber is provided with the spacing fender shoulder 6 of second, the one end that outer body 1 was kept away from to interior body 2 inner chamber just is located the middle part that the spacing fender shoulder 6 of second and has seted up through-hole 7.

The outer tube 1 and the inner tube 2 are mainly made of PE material, which is a thermoplastic resin prepared by polymerizing ethylene. In industry, copolymers of ethylene with small amounts of alpha-olefins are also included. The polyethylene is odorless and nontoxic, feels like wax, has excellent low-temperature resistance (the lowest use temperature can reach-100 to-70 ℃), has good chemical stability, and can resist corrosion of most of acid and alkali (cannot resist acid with oxidation property). Is insoluble in common solvents at room temperature, has low water absorption and excellent electrical insulation.

Polyethylene has excellent chemical stability and resists corrosion of various chemical substances such as hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, amines, sodium hydroxide, potassium hydroxide and the like at room temperature, but nitric acid and sulfuric acid have strong destructive effect on polyethylene.

Furthermore, the outer wall of one end of the outer pipe body 1, which is in contact with the inner pipe body 2, is arc-surface-shaped, one end of the inner pipe body 2, which is positioned outside the outer pipe body 1, is arc-surface-shaped, and the arc surface of the end part of the outer pipe body 1 is in contact with the arc surface of the end part of the inner pipe body 2 to form a hemispherical surface;

one end parts of the outer tube body 1 and the inner tube body 2 are arc-surface-shaped, so that the injury to a human body is reduced, a semi-spherical surface shape can be formed between the end parts of the outer tube body 1 and the inner tube body 2, the integrity is better, and the injury to the human body is reduced;

further, the total length of the combination of the outer tube 1 and the inner tube 2 is 70-120cm, which can be adjusted, and the size can be selected according to the use requirement, so that the combination is suitable for different use environments.

Further, outer body 1 all includes outer pipe layer, interior pipe layer and flexible enhancement layer with interior pipe body 2, and through the setting of three-layer, structural toughness is better, is difficult to the breakage, does not influence normal use.

Furthermore, the outer flexible reinforced layer is coated on the outer wall of the inner pipe layer, the flexible reinforced layer is embedded between the outer pipe layer and the inner pipe layer, the outer pipe layer and the inner pipe layer clamp the outer flexible reinforced layer in a coating mode, the outer flexible reinforced layer is protected, and the toughness reinforcing effect is not affected.

Furthermore, the flexible reinforcing layer is a winding coil which is made of copper metal wires, so that the flexible reinforcing layer has good toughness and can be quickly restored to the original shape after deformation.

Further, the outer pipe body 1 is provided with a rigid reinforcing handle 3 on the outer wall of one end far away from the inner pipe body 2, and the rigid reinforcing handle 3 is convenient to hold the outer pipe body 1 and the inner pipe body 2.

Further, the inner wall diameter of the outer pipe body 1 is the same as the outer wall diameter of the limiting retainer ring 5, so that the outer pipe body 1 and the inner pipe body 2 are not easy to shake.

The working principle is as follows: the inner tube body 2 can move inside the outer tube body 1, so that the total length between the outer tube body 1 and the inner tube body 2 can be adjusted, when the inner tube body is inserted into a human body, the inner tube body 2 is pre-collected into the outer tube body 1 until the outer tube body 1 is inserted into the human body, and the inner tube body 2 is output, so that the pain of a patient is reduced;

through the arrangement of the limiting retainer ring 5 and the limiting cooperation effect of the first limiting retainer shoulder 4, the inner pipe body 2 cannot be separated from the outer pipe body 1;

through the setting of through-hole 7, can make things convenient for output instrument (like bolt ware etc.).

While there have been shown and described the fundamental principles and essential features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

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. The utility model provides a neurovascular catheter structure of flexibility reinforcing, this neurovascular catheter structure of flexibility reinforcing is rectangular form, its characterized in that: the pipe joint comprises an outer pipe body (1) and an inner pipe body (2), wherein the inner pipe body (2) is inserted into the outer pipe body (1), one end of the inner pipe body (2) is positioned outside the outer pipe body (1), the outer pipe body (1) and the inner pipe body (2) are both made of flexible reinforced pipes, one end, connected with the inner pipe body (2), inside the outer pipe body (1) is provided with a first limiting retaining shoulder (4), the inner pipe body (2) is positioned on the outer wall of one end of the inner cavity of the outer pipe body (1) and sleeved with a limiting retaining ring (5), one end, far away from the outer pipe body (1), of the inner cavity of the inner pipe body (2) is provided with a second limiting retaining shoulder (6), one end, far away from the outer pipe body (1), of the inner cavity of the inner pipe body (2) is provided with a through hole (7) in the middle part of the second limiting retaining shoulder (6), the diameter of the through hole (7) is smaller than that of the inner cavity of the inner pipe body (2), and the outer pipe body (1) and the outer pipe body (2) are in an arc surface shape, the inner pipe body (2) is located at one end outside the outer pipe body (1) and is arc-surface-shaped, the arc surface of the end portion of the outer pipe body (1) is in contact with the arc surface of the end portion of the inner pipe body (2) to form a hemispherical surface, and the inner cavity of the end portion of the inner pipe body (2) located outside the outer pipe body (1) is conical.

2. An enhanced flexibility neurovascular catheter structure as in claim 1, wherein: the outer pipe body (1) is arc-surface-shaped with the outer wall of one end of the inner pipe body (2) in contact, one end of the inner pipe body (2) positioned outside the outer pipe body (1) is arc-surface-shaped, and a semi-sphere is formed after the cambered surface of the end part of the outer pipe body (1) is in contact with the cambered surface of the end part of the inner pipe body (2).

3. An enhanced flexibility neurovascular catheter structure as in claim 1, wherein: the total length of the combination of the outer pipe body (1) and the inner pipe body (2) is 70-120 cm.

4. An enhanced flexibility neurovascular catheter structure as in claim 1, wherein: the outer pipe body (1) and the inner pipe body (2) comprise an outer pipe layer, an inner pipe layer and a flexible reinforcing layer.

5. An enhanced flexibility neurovascular catheter structure as in claim 4, wherein: the flexible reinforcing layer is coated on the outer wall of the inner pipe layer and embedded between the outer pipe layer and the inner pipe layer.

6. An enhanced flexibility neurovascular catheter structure as in claim 4, wherein: the flexible reinforcing layer is a winding coil which is a copper metal wire winding coil.

7. An enhanced flexibility neurovascular catheter structure as in claim 1, wherein: and a rigid reinforcing handle (3) is arranged on the outer wall of one end of the outer pipe body (1) far away from the inner pipe body (2).

8. An enhanced flexibility neurovascular catheter structure as in claim 1, wherein: the diameter of the inner wall of the outer tube body (1) is the same as that of the outer wall of the limiting retainer ring (5).