Breathing loop capable of preventing liquid from flowing back

Abstract

The utility model relates to a breathing circuit capable of preventing liquid from flowing back, which comprises a pipeline and an accessory, and an extensible elastic swing component is arranged on the inner wall of the pipeline close to a patient; the extensible elastic swing assembly comprises an elastic piece and a movable ball body. One side of the elastic sheet is connected with the inner wall of the pipeline, and the other side of the elastic sheet is connected with the movable ball body; a limiting groove pipe is further arranged in the pipeline, the movable ball is limited in the limiting groove pipe, and the axial direction of the limiting groove pipe is parallel to the axial direction of the pipeline. Compared with the prior art, the extensible elastic swing assembly is arranged at the end, close to a patient, in the pipeline, the extensible elastic swing assembly can automatically adjust airflow resistance when liquid flows back, an alarm system of the breathing machine is triggered, and therefore medical workers are reminded to treat accumulated humidified water or sputum or secretions in time, and the breathing machine is convenient to use. And serious adverse events are avoided.

Description

Technical Field

[0001] The utility model relates to a breathing circuit, in particular to a breathing circuit capable of preventing liquid backflow. Background Art

[0002] In the medical field, especially for patients who rely on invasive respiratory support, airway humidification is a crucial link. Airway humidification not only keeps the respiratory tract moist and reduces the viscosity of secretions, but also helps patients expel sputum more effectively, thereby reducing the risk of lung complications. However, in existing ventilator circuit designs, the use of humidifiers often causes humidified water to accumulate at the lowest point of the breathing circuit, especially at the patient end. This accumulation not only causes humidified water to flow back, increasing the risk of patients inhaling contaminated air, but can also cause ventilator-associated pulmonary infection (VAP). In severe cases, it may even lead to a sharp deterioration of the patient's respiratory function and increase mortality.

[0003] Furthermore, if sputum is sprayed into the breathing circuit due to the patient's coughing reaction and is not promptly addressed, it can also increase the risk of reflux. In some cases, an excessive volume of the water cup in the breathing circuit can also cause humidified water or secretions to flow back into the patient's respiratory tract, further exacerbating the patient's condition.

[0004] Although some measures have been taken in existing ventilator circuit designs to reduce the risk of fluid backflow, such as the use of water cups and one-way valves, these measures are often unable to completely prevent the problem of fluid backflow. Therefore, developing a breathing circuit system that can effectively prevent fluid backflow is of great significance for improving patient safety and treatment outcomes. Utility Model Content

[0005] The purpose of the present invention is to provide a breathing circuit that prevents liquid backflow in order to overcome the defects of the above-mentioned prior art. By arranging a stretchable elastic swinging component at one end of the pipeline close to the patient, the component can automatically adjust the airflow resistance when the liquid backflows, triggering the alarm system of the ventilator, thereby reminding medical staff to deal with the accumulated humidified water, sputum or secretions in time to avoid the occurrence of serious adverse events. It not only improves the safety of patients, but also helps to reduce the workload of medical staff and improve medical efficiency.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] The utility model provides a breathing circuit for preventing liquid backflow, comprising a pipeline and accessories, wherein an extendable elastic swing component is provided at the inner wall of the pipeline close to the patient;

[0008] The stretchable elastic swing component includes an elastic sheet and a movable sphere;

[0009] One side of the elastic sheet is connected to the inner wall of the pipeline, and the other side of the elastic sheet is connected to the movable ball;

[0010] The pipeline is further provided with a limiting groove tube, the movable ball is limited in the limiting groove tube, and the axial direction of the limiting groove tube is parallel to the axial direction of the pipeline;

[0011] When liquid backflow occurs in the pipeline, the liquid pushes the movable ball to move along the axial direction of the limiting groove tube, and causes the elastic sheet to stretch and open, thereby increasing the air flow resistance in the pipeline. The state of increased air flow resistance is captured by the air flow sensor installed on the pipeline.

[0012] Furthermore, the diameter of the movable sphere is 1 / 10 to 1 / 4 of the inner diameter of the pipeline.

[0013] Furthermore, a connecting line is provided between the elastic sheet and the movable sphere.

[0014] Furthermore, a limiting slot is provided on the limiting slot tube along its length direction, and the connecting line passes through the limiting slot.

[0015] Furthermore, the limiting groove tube is cylindrical or polygonal, the limiting groove opening is opened on the upper surface of the limiting groove tube, and the limiting groove tube is fixedly or detachably connected to the pipeline.

[0016] Furthermore, when the elastic sheet is stretched and opened, the area of ​​the elastic sheet is 1.2 times to 2.0 times that of the natural state.

[0017] Furthermore, the cross section of the elastic sheet is a broken line shape.

[0018] Furthermore, the elastic sheet is made of metal material or non-metal material.

[0019] Furthermore, the movable sphere is made of metal or non-metal material;

[0020] The limiting groove tube is made of metal or non-metal material.

[0021] Furthermore, the connecting wire is made of metal material or non-metal material.

[0022] Compared with the existing technology, the utility model has the following technical advantages:

[0023] 1) By incorporating a stretchable, elastic swinging component into the breathing circuit, the problem of liquid backflow is effectively prevented. This design, when liquid backflow is detected, uses a movable ball to push the elastic plate open, increasing airflow resistance and triggering the ventilator's alarm system. This mechanism not only improves patient safety by avoiding the risk of inhaling contaminated air caused by liquid backflow, but also reduces the risk of ventilator-associated pulmonary infection (VAP) that can occur, significantly reducing patient mortality.

[0024] 2) The design of this utility model allows medical staff to promptly monitor the accumulation of humidified water, sputum, or secretions in the respiratory circuit through the ventilator's alarm and take appropriate measures. This timely feedback mechanism not only improves medical efficiency but also reduces the workload of medical staff, allowing them to more effectively monitor and respond to patients' needs. Furthermore, by reducing sputum crust formation and lung infection rates, this utility model helps maintain normal respiratory function, improving patient comfort and therapeutic effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the partial structure of the breathing circuit for preventing liquid backflow in the present invention.

[0026] In the figure: 1. pipeline, 2. elastic sheet, 3. movable sphere, 4. limiting groove pipe. DETAILED DESCRIPTION

[0027] The following is a detailed description of the present invention with reference to the accompanying drawings and specific embodiments. Any features such as component models, material names, connection structures, control methods, algorithms, etc. not explicitly described in this technical solution are considered to be common technical features disclosed in the prior art.

[0028] Example 1

[0029] This embodiment provides a breathing circuit that prevents liquid backflow. Figure 1 , including a pipeline 1 and accessories, wherein a stretchable elastic swinging component is provided at the inner wall of the pipeline 1 close to the patient; the stretchable elastic swinging component includes an elastic sheet 2 and a movable ball 3; one side of the elastic sheet 2 is connected to the inner wall of the pipeline 1, and the other side of the elastic sheet 2 is connected to the movable ball 3.

[0030] A limiting groove tube 4 is also provided in the pipeline 1, and the movable ball 3 is limited in the limiting groove tube 4, and the axial direction of the limiting groove tube 4 is parallel to the axial direction of the pipeline 1; when liquid backflow occurs in the pipeline 1, the liquid pushes the movable ball 3 to move along the axial direction of the limiting groove tube 4, and causes the elastic sheet 2 to stretch and open, so that the airflow resistance of the pipeline 1 increases, and the state of increased airflow resistance is obtained by the airflow sensor provided on the pipeline 1.

[0031] The diameter of the movable sphere 3 is 1 / 10 to 1 / 4 of the inner diameter of the pipeline 1 .

[0032] A connecting line is provided between the elastic sheet 2 and the movable sphere 3. The limiting slot 4 has a limiting slot along its length, through which the connecting line passes. The limiting slot 4 is cylindrical or polygonal, with the limiting slot defined on its upper surface. When the elastic sheet 2 is extended, its area is 1.2 to 2.0 times that of its natural state. The cross-section of the elastic sheet 2 is a broken line.

[0033] In terms of specific material selection, the elastic sheet 2 is made of metal or non-metal. The movable ball 3 is made of metal or non-metal. The limiting groove tube 4 is made of metal or non-metal. The connecting wire is made of metal or non-metal.

[0034] The working principle of this utility model is as follows:

[0035] Liquid Backflow Prevention Mechanism: In this breathing circuit, an expandable, elastic, swinging assembly is installed on the inner wall of the tube 1 near the patient. This assembly consists of an elastic sheet 2 and a movable sphere 3. One side of the elastic sheet 2 is connected to the inner wall of the tube 1, and the other side is connected to the movable sphere 3. When liquid backflow occurs in the tube 1, the liquid pushes the movable sphere 3 along the axial direction of the limiting groove 4, causing the elastic sheet 2 to expand and open, thereby increasing airflow resistance.

[0036] Airflow resistance change monitoring: As elastic sheet 2 stretches and opens, changes in airflow resistance are detected by an airflow sensor on pipe 1, triggering the ventilator's alarm system. This design promptly alerts medical staff when fluid backflow is detected, improving patient safety.

[0037] Structure and Dimension Design: The diameter of movable sphere 3 is designed to be 1 / 10 to 1 / 4 of the inner diameter of pipe 1. This size ratio ensures that movable sphere 3 can effectively respond to liquid backflow and push elastic sheet 2 to expand. When elastic sheet 2 is stretched and opened, its area can reach 1.2 to 2.0 times its natural state. This design allows elastic sheet 2 sufficient space to expand and increase airflow resistance.

[0038] The connecting wire passes through the limiting slot opened on the limiting slot tube 4. Such a structural design enables the connecting wire to stably connect the elastic piece 2 and the movable ball 3, thereby ensuring the reliability of the swing assembly.

[0039] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A breathing circuit for preventing liquid backflow, comprising a pipeline (1) and accessories, characterized in that: The inner wall of the pipeline (1) close to the patient is provided with an extendable elastic swing component; The stretchable elastic swing component comprises an elastic sheet (2) and a movable sphere (3); One side of the elastic sheet (2) is connected to the inner wall of the pipeline (1), and the other side of the elastic sheet (2) is connected to the movable ball (3); A limiting groove tube (4) is further provided in the pipeline (1), and the movable sphere (3) is limited in the limiting groove tube (4), and the axial direction of the limiting groove tube (4) is parallel to the axial direction of the pipeline (1); When liquid backflow occurs in the pipeline (1), the liquid pushes the movable ball (3) to move along the axial direction of the limiting groove tube (4), and causes the elastic sheet (2) to stretch and open, thereby increasing the airflow resistance of the pipeline (1). The state of increased airflow resistance is captured by the airflow sensor provided on the pipeline (1).

2. A breathing circuit for preventing liquid backflow according to claim 1, characterized in that: The diameter of the movable sphere (3) is 1 / 10 to 1 / 4 of the inner diameter of the pipeline (1).

3. A breathing circuit for preventing liquid backflow according to claim 2, characterized in that: A connecting line is provided between the elastic sheet (2) and the movable sphere (3).

4. A breathing circuit for preventing liquid backflow according to claim 3, characterized in that: The limiting slot tube (4) is provided with a limiting slot along its length direction, and the connecting line passes through the limiting slot.

5. A breathing circuit for preventing liquid backflow according to claim 4, characterized in that: The limiting groove tube (4) is cylindrical or polygonal, and the limiting groove opening is opened on the upper surface of the limiting groove tube (4).

6. The breathing circuit for preventing liquid backflow according to claim 1, characterized in that: When the elastic sheet (2) is stretched and opened, the area of ​​the elastic sheet (2) is 1.2 to 2.0 times that of the natural state.

7. The breathing circuit for preventing liquid backflow according to claim 1, characterized in that: The cross section of the elastic sheet (2) is a broken line shape.

8. The breathing circuit for preventing liquid backflow according to claim 1, characterized in that: The elastic sheet (2) is made of metal material or non-metal material.

9. The breathing circuit for preventing liquid backflow according to claim 1, characterized in that: The movable sphere (3) is made of metal or non-metal material; The limiting groove tube (4) is made of metal or non-metal material.

10. The breathing circuit for preventing liquid backflow according to claim 3, characterized in that: The connecting wire is made of metal or non-metal material.

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