CN112516434B

CN112516434B - Anesthesia catheter

Info

Publication number: CN112516434B
Application number: CN202011368959.2A
Authority: CN
Inventors: 兰天星; 卢言京; 李朝东; 焦连成; 兰天太; 姚西芳; 刘翠翠
Original assignee: Linyi Xinghua Medical Equipment Co ltd
Current assignee: Linyi Xinghua Medical Equipment Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2022-04-22
Anticipated expiration: 2040-11-30
Also published as: CN112516434A

Abstract

The application discloses an anesthetic tube, which comprises a tube body, wherein the tube body is provided with a tube wall, a drug channel is surrounded by the tube wall, the anesthetic tube further comprises a metal wire, the metal wire is fixedly connected in the tube wall, and the metal wire is linear and extends along the length direction of the tube body; the tensile strength of the wire is less than the tensile strength of the catheter body. The wire is the linear type, and the tensile strength of wire is less than the tensile strength of pipe body, make the in-process of taking out the pipe in the pulling, if anesthesia pipe is blocked by human skeleton or ties in vivo, and make when the resistance is great, if still use great power pulling anesthesia pipe, the wire can compare in the pipe body fracture of taking place earlier, medical personnel can obtain great strength feedback this moment, experience the cracked sense of falling space of wire promptly, medical personnel alright with stop to extract the action, in time adjust the patient position in order to take out anesthesia pipe, perhaps suspend the process of taking out temporarily, wait for better opportunity, avoid the pipe fracture.

Description

Anesthesia catheter

Technical Field

The application relates to the technical field of medical equipment, in particular to an anesthesia catheter.

Background

The anesthetic tube is usually made of high polymer materials such as plastics, although the breaking force is high, the breaking elongation is high, a long thinning process is performed before the anesthetic tube is pulled to be taken out, the anesthetic tube can be thinned from an original state (such as the outer diameter of 1.0mm) only by a small force in the process of pulling to be taken out, the anesthetic tube is not broken until the stretched length reaches more than one time of the original length, therefore, when the anesthetic tube is clamped by human bones or tied up in a human body, the anesthetic tube is not easy to be found in the process of pulling the anesthetic tube until the anesthetic tube is pulled to be broken, and the broken part is remained in the human body and is difficult to be taken out.

In the prior art, a spiral steel wire is arranged in the anesthesia catheter to improve the bending resistance of the anesthesia catheter. However, when the steel wire arranged in a spiral shape is pulled along the length direction of the steel wire, a large resistance is generated, so that in the process of pulling and taking out the anesthetic tube, medical staff always feel the large resistance and are more difficult to perceive whether the anesthetic tube is clamped or knotted, and therefore, misoperation is easy to occur, for example, the anesthetic tube is broken due to excessive force, and the anesthetic tube is remained in a human body and is difficult to take out.

Disclosure of Invention

The application provides an anesthesia catheter to solve the problem that current anesthesia catheter is easy to be broken and remains in the human body.

The technical scheme adopted by the application is as follows:

an anesthetic tube comprises a tube body, wherein the tube body is provided with a tube wall, a drug channel is enclosed by the tube wall, the anesthetic tube further comprises a metal wire, the metal wire is fixedly connected in the tube wall, and the metal wire is linear and extends along the length direction of the tube body; the tensile strength of the wire is less than the tensile strength of the catheter body.

Furthermore, the metal wire and the catheter body are integrally formed in a high-pressure co-extrusion mode.

Furthermore, the pipe wall is circumferentially provided with a plurality of medicine outlets communicated with the medicine channel and the outside of the catheter body, and the medicine outlets and the metal wires are arranged in a staggered manner.

Further, the diameter of the metal wire is 0.05-0.2 mm.

Furthermore, the catheter body is provided with a medicine inlet end for medicine to flow in and a medicine outlet end for medicine to flow out, the anesthetic catheter further comprises a softening portion coaxially arranged with the catheter body, the hardness of the softening portion is smaller than that of the catheter body, and one end of the softening portion is fixedly connected with the medicine outlet end.

Further, the length of the softening part is 3-10 mm.

Furthermore, the metal wire extends into the softening part and is fixedly connected with the softening part.

Further, the softening portion is of a solid structure, and the metal wire is welded inside the softening portion.

Furthermore, one end of the softening part, which is far away from the catheter body, is arc-shaped, and the surface of the softening part is smooth.

Furthermore, the metal wires are uniformly distributed along the circumferential direction of the catheter body.

Due to the adoption of the technical scheme, the beneficial effects obtained by the application are as follows:

1. fixedly connected with in the pipe wall the wire has improved the intensity of catheter body prevents this body of pipe is scratched or breaks by the metal syringe needle to when transportation or accomodating, anesthesia catheter twines for annular usually, the existence of wire makes anesthesia catheter can when using under the rigid action of wire, expand fast to straight state, make things convenient for medical personnel will anesthesia catheter implants internally.

In addition, the metal wire is linear, and the tensile strength of the metal wire is smaller than that of the catheter body, so that in the process of pulling and taking out the anesthetic catheter, if the anesthetic catheter is clamped by a human skeleton or knotted in a human body, and the pulling resistance is large, if medical personnel still use large force to pull the anesthetic catheter, the metal wire can be broken compared with the catheter body, at the moment, the medical personnel can obtain large force feedback, namely feel the falling empty feeling of the broken metal wire, the medical personnel can stop pulling out the anesthetic catheter, adjust the body position of a patient in time to take out the anesthetic catheter, or temporarily suspend the taking-out process of the anesthetic catheter, wait for a better time, and avoid the breakage of the anesthetic catheter.

2. As a preferred embodiment of the present application, the diameter of the wire is 0.05-0.2 mm. The diameter of the metal wire is between 0.05mm and 0.2mm, so that the metal wire is as thin as possible on the premise of ensuring that the metal wire has a better supporting effect on the catheter body, and when the resistance of the anesthetic catheter is increased in the pulling process, the metal wire can be rapidly broken, so that medical personnel can rapidly and timely know the state of the anesthetic catheter.

3. As a preferred embodiment of the present application, the catheter body has a medicine inlet end for inflow of the medicine and a medicine outlet end for outflow of the medicine, the anesthetic catheter further includes a softening portion coaxially disposed with the catheter body, the hardness of the softening portion is smaller than that of the catheter body, and one end of the softening portion is fixedly connected with the medicine outlet end. In the use, the softening portion is implanted in the human body, and because the material of softening portion is softer, consequently at the in-process of implanting, the softening portion can take place elastic deformation according to the complicated space in the human body, changes the direction by oneself, will anesthesia pipe leads to the resistance clearance to reach wounded position department smoothly. In addition, the hardness of the softening part is less than that of the catheter body, so that the fracture resistance of the softening part is higher than that of the catheter body, and the softening part can bear larger pulling force without fracture when the anesthetic catheter is pulled out.

4. As a preferred embodiment of the present application, the wire extends into the softened section and is fixedly connected to the softened section. The anti-fracture capability of the metal wire is far higher than that of the softening portion, the anti-fracture capability of the softening portion is further improved due to the existence of the metal wire, the resilience of the softening portion can be accelerated by the toughness of the metal wire, the softening portion is enabled to be coaxial with the catheter body all the time, the anesthetic catheter is enabled to be controlled more easily, and the operation difficulty is reduced.

In addition, the metal wire is fixedly connected with the softening part, so that the positions of the metal wire and the softening part can be kept fixed, the metal wire is prevented from moving in the softening part, and medical staff cannot control the moving direction of the softening part easily.

5. In a preferred embodiment of the present application, an end of the softened portion, which is away from the catheter body, is arc-shaped, and a surface of the softened portion is smooth. One end of the softening part is in a circular arc shape, so that the softening part is in softer contact with human bones, tissues and the like, the surface of the softening part is smooth, the friction force between the softening part and the inside of a human body is reduced, and the damage of the softening part to the human bones, tissues and the like is further reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a cross-sectional view of the anesthesia catheter in an axial direction according to one embodiment of the present application;

FIG. 2 is a radial cross-sectional view of the anesthesia catheter in accordance with one embodiment of the present application;

FIG. 3 is a radial cross-sectional view of the catheter body in accordance with one embodiment of the present application.

Wherein:

1 a catheter body; 11 a pipe wall; 12 a drug channel; 13 a medicine inlet end; 14, a medicine discharging end; 15 a medicine outlet;

2 a softening part;

3 a wire.

Detailed Description

In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the positional or orientational relationship shown in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

As shown in fig. 1 to 3, an anesthetic tube includes a tube body 1, the tube body 1 has a tube wall 11, the tube wall 11 encloses a drug channel, the anesthetic tube further includes a metal wire 3, the metal wire 3 is fixedly connected to the inside of the tube wall 11, and the metal wire 3 is linear and extends along the length direction of the tube body 1; the tensile strength of the wire 3 is less than the tensile strength of the catheter body 1.

The material of the catheter body 1 is not particularly limited in the present invention, and may be made of a polymer material such as plastic or TPU.

The general anesthesia catheter is made of high polymer materials such as plastics, the anesthesia catheter needs to be introduced through a metal needle tube when being implanted into a body, when the anesthesia catheter is used, the wall of the anesthesia catheter is often scratched by the needle point of the metal needle tube, the breaking force of the general high polymer anesthesia catheter is more than 20N, and after the catheter is slightly scratched, the breaking force is reduced to be less than 5N, so that the catheter is easy to break.

This application is through 11 internal fixed connection of pipe wall wire 3 makes catheter body 1's breaking force surpasses 35N, greatly increased catheter body 1's intensity has effectively avoided catheter body 1 breaks at the in-process that uses.

In addition, since the length of the anesthetic tube is usually more than 80cm, and the anesthetic tube is generally wound around a circular ring shape when stored or transported, the anesthetic tube needs to be wound several times and unfolded into a linear shape before use. When the traditional anesthetic tube is wound for too long, slight plastic deformation can occur, so that the unfolding speed is slow, and the use by a doctor is extremely inconvenient. The utility model provides an anesthesia catheter is in be fixed with in the pipe wall 11 wire 3 under the toughness of wire 3 acts on, wire 3 can drive catheter body 1 expandes fast, makes catheter body 1 resumes to straight state, makes things convenient for medical personnel to use, has improved and has used experience.

Compare in the mode of steel wire spiral setting, this application wire 3 is the linear type, makes wire 3 is following 1 length direction's of pipe body tensile strength is less, just wire 3 with 11 fixed connection of pipe wall, when medical personnel's pulling catheter body 1 will when the anesthesia catheter takes out, wire 3 with catheter body 1's atress direction is unanimous and the size is the same, if the anesthesia catheter is blocked or is tied up in the human skeleton, and medical personnel's pulling this moment catheter body 1 receives great resistance, catheter body 1 with wire 3 receives great tensile force. Since the tensile strength of the metal wire 3 is less than that of the catheter body 1, and the metal wire 3 is made of a metal material, the elongation at break is smaller than that of the catheter body 1, and therefore, the metal wire 3 is broken first under the same stress. Stimulate this moment medical personnel of catheter body 1 can experience obvious falling empty and feel, obtain great strength feedback to learn anesthesia catheter is blocked, and medical personnel of being convenient for in time adjust the patient position with the convenience will anesthesia catheter takes out, perhaps suspends the process of taking out temporarily, waits for better opportunity, avoids continuing the pulling catheter body 1 leads to the fracture.

It should be noted that, in the present application, a connection manner of the metal wire 3 and the catheter body 1 is not particularly limited, and as a preferred embodiment of the present application, the metal wire 3 is integrally formed with the catheter body 1 by a high-pressure co-extrusion manner. By adopting a high-pressure co-extrusion process, the metal wire 3 and the catheter body 1 are more simply and conveniently assembled, the manufacturing difficulty is reduced, the production rate is improved, and the strength, the rigidity and other properties of the anesthesia catheter can be ensured.

Of course, the wire 3 may also be fixedly connected to the catheter body 1 by other means, such as welding, and the like, and is not limited herein.

The utility model provides a intercommunication medicine passageway 12 and the outside medicine mouth 15 of going out of pipe body 1 has still been seted up to pipe body 1, it needs to explain that this application is right the position that sets up of medicine mouth 15 does not specifically limit, and it can be one of following embodiments:

the first implementation mode comprises the following steps: in the present embodiment, as shown in fig. 3, the plurality of drug outlets 15 are provided in the tube wall 11 and arranged along the circumferential direction of the catheter body 1, so that the drug can flow out from the outer periphery of the catheter body 1 to the affected part uniformly, thereby improving the anesthetic effect.

Further, go out medicine mouth 15 with metal wire 3 dislocation arrangement prevents metal wire 3 causes the hindrance to the flow of medicine to and avoid the medicine with metal wire 3 reacts, and is right metal wire 3's intensity causes the influence.

The second embodiment: in this embodiment, the drug outlet 15 is provided at one end of the catheter body 1, and the axis of the drug outlet 15 coincides with the axis of the drug channel 12, so that the drug flows out along the length direction of the catheter body 1 and directly flows to the affected part, thereby avoiding the drug channel 12 from being bent, reducing the flow rate of the drug, and reducing the injection efficiency.

As a preferred embodiment of the present application, the diameter of the wire 3 is 0.05-0.2 mm.

In practical application, the external diameter of catheter body 1 is about 1mm usually, consequently the diameter of wire 3 is 0.05-0.2mm, can be in the assurance right catheter body 1 has better support, and effectively improves under the prerequisite of catheter body 1 intensity, make wire 3 is thin as far as possible, so that anesthesia catheter receives when great resistance in length direction, wire 3 can break fast to make medical personnel's quick timely perception the state of anesthesia catheter play medicine end, to timely judgement and change is carried out to anesthesia catheter's the mode of taking out, prevents to continue to use great power pulling catheter body, leads to catheter body breaks, remains and is difficult to take out in the human body.

If the diameter of the metal wire 3 is too small, the rigidity, toughness and the like of the metal wire 3 are too small, so that the catheter body 1 cannot be well supported, the catheter body 1 is easily crushed in the transportation process, the strength of the catheter body 1 cannot be effectively improved by the metal wire 3, and the catheter body is easily broken. In addition, the tensile strength of the wire 3 is low, and the wire may be broken by a small force, so that the state of the anesthetic tube cannot be accurately reflected.

If the diameter of the metal wire 3 is too large, the rigidity, toughness and the like of the metal wire 3 are too large, when the anesthetic tube is stored or transported, the anesthetic tube cannot be wound to a smaller size, the occupied space of the anesthetic tube is increased, and when the anesthetic tube is unfolded, the resilience of the anesthetic tube is large due to the fact that the toughness of the metal wire 3 is too large, and the anesthetic tube is not easy to control. In addition, the diameter of the metal wire 3 is too large, so that the thickness of the tube wall 11 is increased, and on the premise that the outer diameter of the anesthesia catheter is fixed, the volume of the drug channel 12 is compressed, so that the drug flowing speed is reduced, and the anesthesia efficiency is reduced.

Moreover, the metal wire 3 is too thick, the tensile strength of the metal wire is improved, the metal wire is difficult to break, medical personnel cannot timely know the state of the drug outlet end of the anesthetic tube when the anesthetic tube is clamped, and the use experience is reduced.

As a preferred embodiment of the present application, as shown in fig. 1, the catheter body 1 has a drug inlet end 13 for inflow of the drug and a drug outlet end 14 for outflow of the drug, the anesthetic catheter further includes a softening portion 2 coaxially disposed with the catheter body 1, the hardness of the softening portion 2 is smaller than that of the catheter body 1, and one end of the softening portion 2 is fixedly connected to the drug outlet end 14.

The setting of softening portion 2 makes the one end that anesthesia pipe stretched into the human body has elasticity more, softening portion 2 can take place elastic deformation according to the complicated structure in the human body, and the redirecting by oneself will anesthesia pipe leads to the resistance clearance to reach wounded position department smoothly, accurately. When the anesthetic tube is pulled out, the material of the softening part 2 is soft, the anti-fracture capability is stronger, and the fracture of the softening part is prevented from being remained in a human body.

The material of the softening part 2 is not particularly limited, and may be a structure made of a polymer material such as silicone rubber, TPU, TPE, etc., as long as the hardness thereof is less than that of the catheter body 1.

It should be noted that the length of the softening portion 2 is not specifically limited in the present application, and as a preferred embodiment, the length of the softening portion 2 is 3 to 10 mm.

When the anesthesia catheter is used, a part with the front end of 3-10mm is usually inserted into an epidural space, and the length of the softening part 2 is set to be 3-10mm, so that the softening part 2 can be ensured to be in contact with bones, tissues and the like of a human body when the anesthesia catheter is inserted, and the injury to the human body is reduced.

The length of the softening part 2 is 3-10mm, so that the easy operability of the anesthesia catheter can be improved while the injury to a human body is avoided, the labor force of medical personnel is reduced, and the operation efficiency is improved.

Of course, the softening portion 2 may be provided in other length dimensions as needed, and is not particularly limited herein.

Further, as shown in fig. 1, the metal wire 3 extends into the softened portion 2 and is fixedly connected with the softened portion 2.

The metal wire 3 is made of a metal material, and has a higher strength than the softened portion 2, so that the fracture resistance of the softened portion 2 is further improved, and the spring back of the softened portion 2 is assisted to be returned to a coaxial state of the catheter body 1.

It should be noted that, this application does not specifically limit the fixed connection mode of the metal wire 3 and the softening portion 2, and preferably, the metal wire 3 is welded inside the softening portion 2, so that the metal wire 3 and the softening portion 2 are more easily connected, and the connection is more firm and stable, and the metal wire 3 can be effectively prevented from moving, which causes the medical staff to be difficult to control the direction and position of the softening portion 2.

Of course, the metal wire 3 may also be fixedly connected to the softened portion 2 by other means, such as gluing, etc., which is not limited herein.

In the present embodiment, the structure of the softening portion 2 is not particularly limited, and may be one of the following embodiments:

example 1: in this embodiment, the softening portion 2 is a hollow structure to reduce the weight of the softening portion 2, reduce the compression of the softening portion 2 on the tissue in the human body, and avoid causing secondary damage to the patient.

Example 2: in the present embodiment, as shown in fig. 1, the softened portion 2 is a solid structure to increase the strength of the softened portion 2, help the softened portion 2 to rebound to a position coaxial with the catheter body 1, and prevent the softened portion 2 from being broken due to an excessively large bending angle.

Furthermore, as shown in fig. 1, one end of the softening portion 2 away from the catheter body 1 is arc-shaped, and the surface of the softening portion 2 is smooth.

One end of the softening part 2 is in a circular arc shape, so that the softening part 2 is in softer contact with human bones, tissues and the like, the surface of the softening part 2 is smooth, the friction force between the softening part and the inside of a human body is reduced, and the damage of the softening part to the human bones, tissues and the like is further reduced.

As a preferred embodiment of the present application, as shown in fig. 1 to 3, the wires 3 are plural and uniformly distributed along the circumferential direction of the catheter body 1.

Many the existence of wire 3 has improved greatly anesthesia catheter's intensity prevents anesthesia catheter from breaking, and wire 3 to catheter body 1's all directions can both play better supporting role, help anesthesia catheter's resilience. The metal wires 3 are uniformly distributed, so that the stress of the catheter body 1 is more uniform when the catheter body is stretched, the stress concentration on one side caused by uneven stress is prevented, and the possibility of fracture is increased.

Of course, many wire 3 also can the diameter be different from each other, so that wire 3 breaks respectively when receiving different pulling forces, gives medical personnel more strength signals for the transmission, makes the doctor right the state of anesthesia catheter head judges more accurately, so that in time make the reply. For example, the wire 3 with a smaller diameter breaks when it is under a smaller pulling force, and after the medical staff feels the force feedback, the end of the anesthetic catheter is observed and analyzed, and the catheter body 1 can be pulled continuously to take out the anesthetic catheter. When the diameter is great wire 3 receives during great pulling force fracture, then suggestion medical personnel if continue the pulling catheter body 1, then can the fracture, medical personnel alright in time adjust patient's position this moment, perhaps suspend the better opportunity of process of taking out waiting temporarily, avoid anesthesia catheter fracture.

Where not mentioned in this application, can be accomplished using or referencing existing technology.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. An anesthesia catheter, which comprises a catheter body, wherein the catheter body is provided with a catheter wall, and the catheter wall encloses a drug channel,

the anesthetic tube further comprises a metal wire, the metal wire is fixedly connected in the tube wall, and the metal wire is linear and extends along the length direction of the tube body; the tensile strength of the wire is less than the tensile strength of the catheter body; the utility model discloses a anesthesia catheter, including catheter body, softening portion, wire, medicine feed end, softening portion, the pipe body has the medicine feed end that supplies the medicine inflow to and the play medicine end that supplies the medicine outflow, anesthesia catheter still include with the coaxial softening portion that sets up of catheter body, the hardness of softening portion is less than the hardness of catheter body, the one end of softening portion with play medicine end fixed connection, the length of softening portion is 3-10mm, the wire stretch into in the softening portion, and with softening portion fixed connection.

2. The anesthetic tube of claim 1,

the metal wire and the catheter body are integrally formed in a high-pressure co-extrusion mode.

3. The anesthetic tube of claim 2,

the medicine outlet is communicated with the medicine channel and the medicine outlet outside the catheter body, and the medicine outlet and the metal wires are arranged in a staggered mode.

4. The anesthetic tube of claim 1,

the diameter of the metal wire is 0.05-0.2 mm.

5. The anesthetic tube of claim 1,

the softening portion is of a solid structure, and the metal wire is welded inside the softening portion.

6. The anesthetic tube of claim 1,

the softening portion is far away from one end of the catheter body and is arc-shaped, and the surface of the softening portion is smooth.

7. The anesthesia catheter of any of claims 1-6, wherein said wire is a plurality of wires and is uniformly distributed along the circumference of said catheter body.