CN116115861A

CN116115861A - Central venous catheter

Info

Publication number: CN116115861A
Application number: CN202310042213.XA
Authority: CN
Inventors: 姜小波; 程宇; 杨金亮
Original assignee: Foshan Special Medical Catheter Co ltd
Current assignee: Foshan Special Medical Catheter Co ltd
Priority date: 2023-01-12
Filing date: 2023-01-12
Publication date: 2023-05-16

Abstract

The invention discloses a central venous catheter which comprises a catheter body, a temperature measuring assembly and an infusion tube. The catheter body is provided with a temperature measuring channel and at least one infusion channel. The temperature measuring assembly comprises a temperature probe and a wire connected with the temperature probe, the temperature probe is arranged in the temperature measuring channel and is close to the first end of the catheter body, and the wire is led out through the temperature measuring channel. Wherein, offer the play liquid side opening with infusion passageway intercommunication on the outer wall of pipe body, and go out the distance between the first end of liquid side opening and pipe body and be greater than the distance between temperature probe and the first end of pipe body. The number of the infusion tubes is the same as that of the infusion channels, and one end of each infusion tube is fixed on the second end of the catheter body and is communicated with the infusion channels one by one. The invention provides a temperature-measuring central venous catheter, which realizes liquid infusion and can accurately monitor the body temperature in real time.

Description

Central venous catheter

Technical Field

The invention relates to the technical field of medical instruments, in particular to a central venous catheter.

Background

The central venous catheter (CVC, central Venous Catheter) is a catheter which is arranged to the central vein through the internal jugular vein, subclavian vein or femoral vein, is used for providing short-term vein treatment for patients, can greatly reduce the pain brought to the patients by frequent venipuncture, avoids the influence and damage of the stimulatory drugs on the veins, has long retention time and low complication occurrence rate.

Currently, CVC catheters can be divided into two types, one type is a silicone central venous catheter manufactured by integrally forming a silicone material through a heating and curing process; the other type is a polyurethane central venous catheter which is manufactured by integrally forming polyurethane materials after hot melting and cooling.

The central venous catheter is commonly used in various operations and intensive care, monitors central venous pressure of patients, infuses medicines and nutrition and the like, and is an intravascular catheter with mature technology and wide application. Intensive care patients sometimes experience hyperthermia or hypothermia due to surgical, traumatic, infectious, etc. factors. Complications caused by hypothermia have been demonstrated, including increased incidence of post-operative wound infection and cardiac adverse events, perioperative coagulation dysfunction, chills, and the like. Hyperthermia is less frequently compared to hypothermia, but is often associated with some malignant events, such as malignant hyperthermia or sepsis. The body temperature is accurately and continuously monitored, so that the body temperature change of a patient can be known at the first time, and a basis is provided for rapid judgment of the state of an illness and timely diagnosis and treatment. However, the current central venous catheter does not have a temperature measurement function, and the central venous catheter capable of detecting the body temperature in real time while infusing the liquid is urgently needed to be developed in the market.

Disclosure of Invention

The invention mainly aims to provide a central venous catheter which aims at realizing real-time detection of body temperature while infusing liquid.

To achieve the above object, the present invention provides a central venous catheter comprising:

the catheter body is provided with a first end and a second end which are opposite, and a temperature measuring channel and at least one infusion channel are formed in the catheter body;

the temperature measuring assembly comprises a temperature probe and a wire connected with the temperature probe, the temperature probe is arranged in the temperature measuring channel and is close to the first end of the catheter body, and the wire is led out through the temperature measuring channel;

the outer wall of the catheter body is provided with a liquid outlet side hole communicated with the infusion channel, and the distance between the liquid outlet side hole and the first end of the catheter body is larger than that between the temperature probe and the first end of the catheter body; and

and the number of the infusion pipes is the same as that of the infusion channels, and one end of each infusion pipe is fixed on the second end of the catheter body and is communicated with the infusion channels one by one.

Optionally, the temperature measuring assembly further includes a wire pipe, one end of which is fixed on the second end of the catheter body and is communicated with the temperature measuring channel, so as to wrap the wire.

Optionally, the central venous catheter further comprises a first connector and a second connector, wherein the first connector is fixed at one end of the infusion tube away from the catheter body and is used for externally connecting a liquid supply device or an infusion bag, and the second connector is fixed at one end of the wire away from the catheter body and is used for externally connecting monitoring equipment.

Optionally, the number of the liquid outlet side holes is the same as the number of the infusion channels, and the liquid outlet side holes are arranged in one-to-one correspondence with the infusion channels.

Optionally, each infusion channel is provided with two or more liquid outlet side holes correspondingly.

Optionally, the temperature probe is adhesively fixed in the temperature measurement channel.

Optionally, the temperature probe is a thermistor type temperature probe.

Optionally, an opening communicating with one of the infusion channels is provided in the center of the end face of the first end of the catheter body for the passage of a guide wire.

Optionally, the first end of the catheter body is conical.

Optionally, the thermometric channel and the infusion channel are both circular or square.

In the technical scheme of the invention, the central venous catheter comprises a catheter body, a temperature measuring assembly and an infusion tube. The catheter body is provided with a temperature measuring channel and at least one infusion channel. The temperature measuring assembly comprises a temperature probe and a wire connected with the temperature probe, the temperature probe is arranged in the temperature measuring channel and is close to the first end of the catheter body, and the wire is led out through the temperature measuring channel. Wherein, offer the play liquid side opening with infusion passageway intercommunication on the outer wall of pipe body, and go out the distance between the first end of liquid side opening and pipe body and be greater than the distance between temperature probe and the first end of pipe body. The number of the infusion tubes is the same as that of the infusion channels, and one end of each infusion tube is fixed on the second end of the catheter body and is communicated with the infusion channels one by one. Thus, the infusion liquid is realized, and the body temperature can be accurately monitored in real time.

It can be understood that, because the liquid outlet side hole communicated with the infusion channel is formed in the outer wall of the catheter body, and the distance between the liquid outlet side hole and the first end of the catheter body is greater than the distance between the temperature probe and the first end of the catheter body, infusion liquid can flow out through the liquid outlet side hole, the influence on temperature monitoring caused by the flowing of liquid medicine through the temperature probe is avoided, and the accuracy of body temperature monitoring is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a central venous catheter according to an embodiment of the present invention;

FIG. 2 is a radial cross-sectional view of the middle portion of the catheter body in one embodiment of the central venous catheter of the invention;

FIG. 3 is a schematic view of another embodiment of a central venous catheter of the present invention;

fig. 4 is a radial cross-sectional view of the middle of a catheter body in another embodiment of a central venous catheter of the invention.

Reference numerals illustrate:

10. a catheter body; 20. a temperature measuring assembly; 30. an infusion tube; 10a, a temperature measuring channel; 10b, infusion channel; 10c, a liquid outlet side hole; 21. a temperature probe; 22. a wiring tube; 301. a first connector; 201. and a second connector.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. 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 be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a central venous catheter.

Referring to fig. 1-4, in some embodiments of the present invention, the central venous catheter includes a catheter body 10, a temperature measurement assembly 20, and an infusion tube 30. The catheter body 10 is provided with a temperature measuring channel 10a and at least one infusion channel 10b. The temperature measuring assembly 20 comprises a temperature probe 21 and a wire connected with the temperature probe 21, wherein the temperature probe 21 is arranged in the temperature measuring channel 10a and is close to the first end of the catheter body 10, and the wire is led out through the temperature measuring channel 10 a. Wherein, a liquid outlet side hole 10c communicated with the infusion channel 10b is arranged on the outer wall of the catheter body 10, and the distance between the liquid outlet side hole 10c and the first end of the catheter body 10 is larger than the distance between the temperature probe 21 and the first end of the catheter body 10. The infusion tubes 30 are the same in number as the infusion channels 10b, and one end of the infusion tube 30 is fixed to the second end of the catheter body 10 and communicates one-to-one with the infusion channels 10b.

The temperature measuring channel 10a and the infusion channel 10b may be circular, square, or the like, and are not limited herein. To facilitate the procedure, in this embodiment, the first end of the catheter body 10 is conically shaped. It should be noted that the first end of the catheter body 10 mentioned above and below is a tip (distal end), and the second end of the catheter body 10 is a tail (proximal end).

In this embodiment, the catheter body 10 may be made of silica gel, and the infusion tube 30 may be made of thermoplastic, but is not limited thereto.

In this embodiment, the temperature probe 21 may be a thermistor type temperature probe, which may be adhered and fixed in the temperature measuring channel 10a by glue, and the type and the fixing manner of the temperature probe 21 are not limited.

It should be noted that, as shown in fig. 2 and 4, the infusion channel 10b in the central venous catheter may include a main infusion channel, and one, two or more side infusion channels may be further provided, which is not limited herein.

According to the invention, the catheter body 10 is provided with the temperature measuring channel 10a and at least one infusion channel 10b, the temperature measuring component 20 comprises the temperature probe 21 and wires, the temperature probe 21 is arranged in the temperature measuring channel 10a and is arranged close to the first end of the catheter body 10, the wires of the temperature probe 21 are led out through the temperature measuring channel 10a, the outer wall of the catheter body 10 is provided with the liquid outlet side hole 10c communicated with the infusion channel 10b, the distance between the liquid outlet side hole 10c and the first end of the catheter body 10 is larger than the distance between the temperature probe 21 and the first end of the catheter body 10, the number of the infusion tubes 30 and the number of the infusion channels 10b are the same, and one end of each infusion tube 30 is fixed on the second end of the catheter body 10 and is communicated with one to one with each infusion channel 10b, so that liquid infusion is realized, and meanwhile, the body temperature can be accurately monitored in real time.

It can be understood that, since the outer wall of the catheter body 10 is provided with the liquid outlet side hole 10c communicated with the infusion channel 10b, and the distance between the liquid outlet side hole 10c and the first end of the catheter body 10 is greater than the distance between the temperature probe 21 and the first end of the catheter body 10, the infusion liquid can flow out through the liquid outlet side hole 10c, thereby avoiding the influence on temperature monitoring caused by the flowing of the liquid medicine through the temperature probe 21, and greatly improving the accuracy of the temperature monitoring.

To further enhance the ease of administration, referring to fig. 1 and 3, in this embodiment, the center of the end face of the first end of the catheter body 10 is provided with an opening communicating with an infusion channel 10b for the passage of a guidewire.

When the normal temperature liquid medicine enters the blood vessel through the infusion channel 10b, the liquid medicine preferentially enters the blood vessel through the liquid outlet side hole 10c, and does not enter the blood vessel from the tip opening, so that the temperature measured by the temperature probe 21 is not affected by the normal temperature liquid in the infusion channel 10b to reduce the temperature, when the normal temperature liquid enters the blood vessel from the liquid outlet side hole 10c, the human body has a regulating function because the flow speed of the normal temperature liquid is slower, the normal temperature liquid entering the blood vessel does not affect the blood temperature in the blood vessel, and the blood temperature in the blood vessel does not fluctuate, so that the normal temperature liquid flowing out from the liquid outlet side hole 10c does not affect the measurement temperature of the temperature probe 21.

When the catheter body 10 has a plurality of infusion channels 10b, the liquid outlet side hole 10c should be arranged in front of the bonding position of the temperature probe 21 to prevent the temperature of the temperature probe 21 from being affected by the normal temperature liquid flowing through the side cavity.

To protect the wires of the temperature probe 21 to increase the service life of the central venous catheter, referring to fig. 1 and 3, in some embodiments, the temperature measurement assembly 20 further includes a wire tube 22, one end of the wire tube 22 being secured to the second end of the catheter body 10 and communicating with the temperature measurement channel 10a to encase the wires.

In this embodiment, the wiring tube 22 may be made of transparent or non-transparent soft plastic material, which is not limited herein. The outer diameter of the catheter body 10 may be larger than the outer diameters of the infusion tube 30 and the wire tube 22, and the tube diameter of the wire tube 22 may be designed according to the thickness of the connection wire of the temperature probe 21, which is not limited herein.

Referring to fig. 1 and 3, in an embodiment, the number of the liquid outlet side holes 10c is the same as that of the infusion channels 10b, and the liquid outlet side holes 10c are arranged in one-to-one correspondence with the infusion channels 10b. Thus, the production, processing and manufacturing can be facilitated.

Of course, in other embodiments, two or more side holes 10c may be provided for each infusion channel 10b to allow the infused liquid medicine to flow out in a dispersed manner.

In addition, in some embodiments, as shown in fig. 1 and 3, the central venous catheter may further include a first connector 301 and a second connector 201, wherein the first connector 301 is fixed to an end of the infusion tube 30 away from the catheter body 10 and is used for externally connecting a liquid supply device or an infusion bag, and the second connector 201 is fixed to an end of the running tube 22 away from the catheter body 10 and is used for externally connecting a monitoring device. Therefore, the liquid supply device or the infusion bag can be conveniently connected, the temperature monitoring equipment and the like can be conveniently connected, and the convenience of operation is effectively improved.

Wherein, the first connector 301 may be a luer connector, and the second connector 201 may be a wire connector, which is not limited herein.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A central venous catheter, comprising:

2. The central venous catheter of claim 1, wherein the temperature measurement assembly further comprises a wire conduit having one end secured to the second end of the catheter body and in communication with the temperature measurement channel for encasing the lead.

3. The central venous catheter of claim 1 or 2, further comprising a first connector secured to an end of the infusion tube remote from the catheter body for externally connecting a fluid supply or infusion bag, and a second connector secured to an end of the lead remote from the catheter body for externally connecting a monitoring device.

4. The central venous catheter of claim 1, wherein the number of fluid outlet side holes is the same as the number of infusion channels, and the fluid outlet side holes are arranged in a one-to-one correspondence with the infusion channels.

5. The central venous catheter of claim 1, wherein each of the infusion channels is provided with two or more of the fluid outlet side holes.

6. The central venous catheter of claim 1, wherein the temperature probe is adhesively secured within the thermometric channel.

7. The central venous catheter of claim 1, wherein the temperature probe is a thermistor type temperature probe.

8. The central venous catheter of claim 1, wherein the end face center of the first end of the catheter body is provided with an opening in communication with one of the infusion channels for passage of a guidewire.

9. The central venous catheter according to claim 8, wherein the catheter body has a conical shape at a first end.

10. The central venous catheter of claim 1, wherein the thermometric channel and the infusion channel are both circular or square.