WO2020154933A1

WO2020154933A1 - Medicinal oxygen cannula

Info

Publication number: WO2020154933A1
Application number: PCT/CN2019/073800
Authority: WO
Inventors: 刘�英; 李爽; 胡万宁; 刘浩源; 郑瑞云; 郑淏元
Original assignee: 唐山哈船科技有限公司; 华北理工大学
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2020-08-06
Also published as: AU2019100778A4

Abstract

A medicinal oxygen cannula, comprising a cannula body (1), a transition cannula (2), and two nasal prongs (3). The cannula body (1) is connected to the transition cannula (2); the two nasal prongs (3) are radially communicated with the transition cannula (2); the inner wall of connecting parts of the nasal prongs (3) and the transition cannula (2) is of a smooth transition arc structure. The structure of the inner wall of the connecting parts of the transition cannula (2) and the nasal prongs (3) is improved, so that an airflow flowing through cannot generate a turbulent flow, and the probability of noise is reduced. By increasing the inner diameters of the transition cannula (2) and the nasal prongs (3), the airflow velocity is reduced, and noise generated when pressurized air flows through is further avoided. In addition, an air permeable filler (21) is additionally provided in the transition cannula (2), so that the purpose of reducing the air velocity is also achieved.

Description

Medical oxygen tube

Technical field

The invention relates to the technical field of medical equipment, in particular to a medical oxygen tube.

Background technique

Medical oxygen refers to the use of cryogenic separation to separate oxygen in the atmosphere to supply oxygen for medical treatment of patients. Generally, the bottled medical oxygen is sent to various medical places. The national standard for the purity of bottled medical oxygen is ≥99.5%, and there are strict limits on the carbon dioxide content, carbon monoxide content, pH, gaseous oxide, etc., and most of the bottled medical oxygen is With pressure, it is directly delivered to the patient's nasal cavity through a tube.

The existing pipe is made of transparent plastic material, with two outlets directly facing the nostrils, which is convenient for the patient to breathe; but because the pipe is usually small in inner diameter, it is easy to generate noise when conveying compressed air, which will affect the patients in the ward . If the oxygen flow is reduced, although the noise can be reduced, it cannot meet the patient's oxygen requirements.

In addition, after opening the oxygen supply valve to the patient who needs oxygen, oxygen will be continuously provided to the patient. This oxygen supply will continue until the doctor confirms that no more oxygen is needed. But in fact, in this oxygen supply process, the patient does not always have to wear oxygen supply equipment, or more specifically, when the patient exhales, the oxygen supply is wasteful and cannot be absorbed by the patient, resulting in a waste of resources.

Although a valve is used to close the oxygen supply pipeline during the oxygen supply process, if the patient does not use it temporarily, the oxygen supply switch next to him can be turned off; however, there is no way to save wasted oxygen supply during exhalation. This kind of waste is not too much for an individual, but it is very huge in combination with the oxygen supply of all patients. Therefore, in order to save resources, it is necessary to develop a medical oxygen equipment that can avoid waste.

Summary of the invention

Aiming at the shortcomings of the prior art, the present invention proposes a medical oxygen tube, which does not generate noise under the condition of normal oxygen supply to the patient and reduces the influence.

In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions: a medical oxygen tube, comprising a tube body, a transition tube and two nasal insertion tubes, the tube body is connected to the transition tube, and the transition tube radially communicates with the two nasal insertion tubes , The inner wall of the connection between the nose insertion tube and the transition tube is a smooth transition arc structure.

Further, the inner diameter of the transition tube and the nasal insertion tube are both larger than the inner diameter of the tube.

Further, a gas-permeable filler is provided in the transition pipe.

Further, the porosity of the air-permeable filler is 63% to 83%.

Further, a temperature sensor is provided at the front end of the nose tube.

Further, a temperature control valve is provided on the pipe body, and the temperature control valve is connected to the temperature sensor via a controller.

Further, the nasal insertion tube and the transition tube are integrally injection molded.

Further, the tube body and the transition tube are movably sealed and inserted.

Further, the inner diameter of the transition pipe is 10-12 mm.

Compared with the prior art, the present invention has the following advantages: the structure of the inner wall at the junction of the transition tube and the nasal insertion tube is improved, so that the airflow passing by does not appear turbulent, and the probability of noise is reduced; combined with increasing the transition tube And the inner diameter of the nose tube, reduce the airflow speed of the pressure gas, and further prevent noise when the pressure gas flows. In addition, adding air-permeable fillers in the transition tube can also achieve the purpose of reducing the airflow velocity.

A temperature sensor is installed at the front end of the nasal tube, which can detect the temperature of the patient's exhaled airflow, which can not only detect the patient's body temperature, but also adjust the temperature control valve on the tube according to the sensor, avoiding the traditional uninterrupted air supply process The resulting waste situation; due to the high temperature of the exhaled airflow, the temperature control valve is closed in time according to the information measured by the temperature sensor, thereby avoiding the waste of oxygen delivery when the patient exhales.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on the structure shown in these drawings.

Figure 1 is a schematic diagram of the structure of the medical oxygen tube of the present invention;

Figure 2 is a partial enlarged view of the transition tube and the nasal tube;

Icon mark:

1-tube body, 2-transition tube, 21-permeable filler, 3-nasal tube, 31-temperature sensor, 4-temperature control valve.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain that it is in a specific posture (as shown in the drawings). If the specific posture changes, the relative positional relationship, movement, etc. of the various components will also change accordingly.

In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions conflicts or cannot be achieved, it should be considered that such a combination of technical solutions does not exist. , Is not within the protection scope of the present invention.

As shown in Figure 1, a medical oxygen tube includes a tube body 1, a transition tube 2 and two nasal insertion tubes 3. The tube body 1 is connected to the transition tube 2, and the transition tube 2 is connected to the two nasal insertion tubes 3 in the radial direction. The inner wall of the connection between the nose insertion tube 3 and the transition tube 2 is a smooth transition arc structure.

In the traditional medical oxygen tube, the inner wall of the junction between the transition tube 2 and the nasal insertion tube 3 is right-angled. When the pressure oxygen sent in passes here, turbulence is prone to occur, causing local airflow velocity to be too fast and sound. By improving the inner wall structure of the joint, this product is a smooth transition arc structure, where the airflow is not prone to turbulence, and the whole is in a laminar flow state, which reduces the occurrence of noise.

Furthermore, the inner diameters of the transition tube 2 and the nose insertion tube 3 are both larger than the inner diameter of the tube body 1. Increase the inner diameter of the transition tube 2 and the nasal insertion tube 3, especially larger than the inner diameter of the tube body 1, so that when the air flow enters the transition tube 2 from the tube body 1 to the nasal tube, the cross section is enlarged and the overall flow rate is reduced. The smooth transition arc structure at the junction of the tube 2 and the nose tube 3 greatly reduces the probability of noise generated by the airflow.

The inner diameter of the traditional oxygen tube is 6-10mm. In this product, the inner diameter of the tube body 1 maintains the traditional size, while the inner diameters of the transition tube 2 and the nasal tube 3 are enlarged to 10-12mm. In this way, the cross-sectional area of the transition tube 2 relative to the tube body 1 can be expanded up to 4 times, and the speed of the airflow entering the transition tube 2 is reduced instantaneously, and it enters the nasal tube 3 quite slowly without noise.

Since the inner diameter of the transition pipe 2 is larger than the inner diameter of the pipe body 1, the cross-section of the airflow will instantly expand when it enters the transition pipe 2, which is likely to cause local instability and turbulence in the airflow. Therefore, a gas-permeable filler 21 is added to the transition pipe 2. It is used to buffer the instability of the airflow caused by the abrupt cross-sectional area, and to ensure the smooth diffusion of the airflow through the filler 21.

Preferably, the air-permeable filler 21 has a porosity of 63% to 83%, such as a solid filler such as activated carbon with a large pore size. The filling of the air-permeable filler may be partial filling, as shown in FIG. 2, or the entire transition tube 2 may be filled.

The transition pipe 2 is filled with air-permeable substances. Due to the relatively large porosity of the filling, these substances themselves have a stabilizing effect on the airflow, and at the same time, they can also filter the airflow to filter out some impurities or harmful substances.

The traditional oxygen delivery process is continuous delivery, that is, after opening the valve, the bottled oxygen will be delivered to the outlet of the nasal tube 3, no matter what the patient is in, such as exhaling or temporarily pulling out the nasal tube 3, this will inevitably lead to delivery Oxygen does not work, causing waste.

This product is equipped with a temperature sensor 31 on the nasal tube 3, which uses the difference between the exhaled temperature and the temperature of the supplied oxygen. The exhaled temperature is generally body temperature. As long as the temperature of the exhaled gas is sensed, or the temperature of the supplied oxygen is higher, The oxygen delivery device can be controlled to suspend the gas supply. Of course, for those who temporarily pull out the nasal tube 3, it is clearer when to suspend the gas supply.

The temperature sensor 31 is not only to provide the function of when to stop the air supply, but also to monitor the patient's body temperature.

For the temperature information detected by the temperature sensor 31, it can be connected to the oxygen pipeline control valve through the controller through a wired method, and the temperature change range is set in the controller, and the corresponding relationship with the control valve switch; this kind of technology is used in electronic control equipment The middle is a common operation, so I will add one by one here.

Preferably, this product adopts a temperature control valve 4 provided on the pipe body 1, and the temperature control valve 4 is connected to the temperature sensor via a controller. The temperature control valve 4 is an electric type, and based on a set temperature range, the valve is automatically switched on and off according to temperature changes.

Since the pipe body 1 of the oxygen pipe is usually connected with both ends of the transition pipe 2, the position of the main pipe body is selected at the position where the temperature control valve 4 is set, which will not affect the normal use of the patient, but can also be used well. To switch function.

Through the combination of the temperature sensor 31 and the thermostat 4, the oxygen delivery can be selectively turned on or off, such as supplying air when the patient inhales, and pauses when exhaling, saving oxygen supply.

In order to ensure the stability of the oxygen delivery of this product, it is especially important for the smooth connection of the transition tube 2 and the nasal tube 3. Therefore, in the production, the two are injection molded at one time. The inner wall of the connection is smooth and the airflow stability is good, and it is difficult to produce noise.

The tube body 1 and the transition tube 2 are plugged in, especially the movable sealing plug. In this way, the integrated structure of the transition tube 2 and the nasal insertion tube 3, because the nasal insertion tube 3 is in contact with the patient, after the routine oxygen delivery is completed, The associated tube body 1, the transition tube 2 and the nasal insertion tube 3 are treated as medical waste. In this product, the tube body 1 and the transition tube 2 are inserted, and the transition tube 2 is made longer than the traditional structure to avoid the tube body 1. In contact with the patient, only the integrated transition tube 2 and the nose tube 3 are used as consumables, and the tube body 1 itself is a general-purpose material that can be used multiple times, avoiding the situation of discarding after one-time use. At the same time, medical waste is reduced and resources are saved.

In addition, in terms of production, breathable fillers can be added to the transition tube 1 as needed. The tube body 1 and the transition tube 2 are connected by plugging, and the addition of the breathable filler will not be affected by the tube body 1, so it is convenient to manufacture easy.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also Should be regarded as the protection scope of the present invention.

Claims

A medical oxygen tube includes a tube body, a transition tube, and two nasal insertion tubes. The tube body is connected to the transition tube. The transition tube communicates with the two nasal insertion tubes in the radial direction, and is characterized in that: the nasal insertion tube and the The inner wall of the junction of the transition pipe is a smooth transition arc structure.
The medical oxygen tube according to claim 1, wherein the inner diameter of the transition tube and the nasal insertion tube are both larger than the inner diameter of the tube.
3. The medical oxygen tube according to claim 2, wherein the transition tube is provided with a gas-permeable filler.
The medical oxygen tube according to claim 3, wherein the porosity of the gas-permeable filler is 63% to 83%.
The medical oxygen tube according to claim 1, wherein a temperature sensor is provided at the front end of the nasal tube.
5. The medical oxygen tube according to claim 5, wherein a temperature control valve is provided on the tube body, and the temperature control valve is connected to the temperature sensor via a controller.
The medical oxygen tube according to claim 1, wherein the nasal insertion tube and the transition tube are integrally injection molded.
The medical oxygen tube according to claim 1, wherein the tube body and the transition tube are movably sealed and inserted.
The medical oxygen tube according to claim 2, wherein the inner diameter of the transition tube is 10-12 mm.