Pressure-adjustable double-cavity airway suction tube

Abstract

The utility model discloses a pressure-adjustable double-cavity airway suction tube, relates to the field of medical instruments, provides a double-cavity airway suction tube capable of adjusting pressure in a suction cavity, and comprises an airway suction tube which comprises a suction cavity used for sucking secretions in an airway and a pressure adjusting cavity used for adjusting negative pressure in the airway. The suction cavity is connected with the pressure adjusting cavity; the upper portion of the pressure adjusting cavity is connected with a plug matched with the inner diameter of the pressure adjusting cavity. Lower respiratory tract negative pressure generated by the suction cavity in the negative pressure suction process can be adjusted by supplementing air through the pressure adjusting cavity, and the damage to airway mucous membrane caused by overlarge negative pressure and the risk of pulmonary alveolus collapse after excessive air in pulmonary alveolus is sucked can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to an adjustable pressure double - cavity airway suction tube. Background Art

[0002] Airway suction is most commonly used in patients with endotracheal intubation or tracheotomy, or those who are unable to cough up excessive secretions in the airway. Airway suction is widely used in the treatment of critically ill patients. When performing airway suction, the airway suction tube is inserted into the airway through the endotracheal tube or tracheotomy tube, and then negative pressure is turned on to suck outwards, which can remove respiratory secretions, keep the respiratory tract unobstructed, and improve pulmonary ventilation.

[0003] The existing airway suction tubes are single - cavity tubes without an effective external air supply path. When the negative pressure is too high or the suction time is too long, first, a large amount of gas in the lungs is quickly sucked out, which is likely to cause hypoxemia, airway mucosal bleeding, increased intracranial pressure, alveolar collapse, and even atelectasis, affecting the patient's treatment experience and prognosis; second, the air pressure in the lungs after suction decreases or even forms a "negative pressure" environment, which is not conducive to the outward discharge of airway secretions and affects the clearance effect of airway secretions.

[0004] A sputum suction tube device for sucking airways in different directions with the publication (announcement) number of (CN 212308538 U). In the utility model, the pipeline part is formed by the sputum suction tube and the oxygen supply tube being attached to each other. The oxygen supply tube transports oxygen into the airway to avoid hypoxemia caused by a decrease in the amount of gas supplied to the peripheral lung tissue during sputum suction by the patient; the control head is sleeved on the surface of the oxygen supply tube and can rotate relative to the oxygen supply tube. It can be understood that during sputum suction, by rotating the control head, the sputum suction tube connected to the control head rotates in the airway, that is, the sputum suction tube can perform 360° all - around sputum suction in the airway, and can suck the secretions in all directions of the entire artificial airway and respiratory tract, greatly reducing the sputum suction time and eliminating the blind spots that cannot be sucked.

[0005] However, the sputum suction tube and the oxygen supply tube in this application are only attached to each other and are not connected. Moreover, the end of the oxygen supply tube in this application is open. During sputum suction, it may cause the end of the oxygen supply tube to be blocked by sputum, thus failing to achieve the purpose of transporting oxygen into the airway, and further unable to avoid the damage to the airway mucosa caused by excessive negative pressure. Summary of the Invention

[0006] Aiming at the above - mentioned problems, the utility model aims to provide an adjustable pressure double - cavity airway suction tube. By setting the suction tube in the form of a double - cavity structure of a suction cavity and a pressure - regulating cavity, and connecting the suction cavity and the pressure - regulating cavity, and setting the end of the pressure - regulating cavity as a closed end, it can effectively avoid the damage to the airway mucosa caused by excessive negative pressure and the risk of alveolar collapse after excessive air in the alveoli is sucked out.

[0007] The main idea of the technical solution adopted by the present utility model: The existing suction tube is set as a single tube without an effective external air supply passage. When the negative pressure is too large or the suction time is too long, first, a large amount of gas in the lungs will be quickly and massively sucked out, easily causing hypoxemia, airway mucosal bleeding, increased intracranial pressure, alveolar collapse, and even atelectasis, etc., affecting the patient's treatment experience and prognosis; second, the air pressure in the lungs after suction decreases or even forms a "negative pressure" environment, which is not conducive to the outward discharge of airway secretions and affects the clearance effect of airway secretions. To solve the above problems, in this application, the suction tube is designed in a double-chamber form, one of which is a suction chamber for sucking airway secretions, and the other is a pressure regulation chamber for regulating the negative pressure in the airway. And the suction chamber and the pressure regulation chamber are connected to each other, which can effectively avoid the damage to the airway mucosa caused by excessive negative pressure and the risk of alveolar collapse after excessive air in the alveoli is sucked out.

[0008] To achieve the above object, the technical solution adopted by the present utility model is as follows:

[0009] An adjustable-pressure double-chamber airway suction tube, including an airway suction tube, characterized in that:

[0010] The airway suction tube includes a suction chamber for sucking airway secretions and a pressure regulation chamber for regulating the negative pressure in the airway, and the suction chamber and the pressure regulation chamber are connected;

[0011] A plug adapted to its inner diameter is connected above the pressure regulation chamber;

[0012] The end of the pressure regulation chamber is a closed end.

[0013] Further, the suction chamber and the pressure regulation chamber are connected and a pressure regulation channel is provided near the end for facilitating direct entry of external gas into the suction chamber.

[0014] Further, a plurality of suction channels for sucking airway secretions are provided on one side of the suction chamber.

[0015] Further, the end of the suction chamber is an open end.

[0016] The beneficial effects of the present utility model are: Compared with the prior art, the improvement of the present utility model lies in that by setting the suction tube as a double chamber, the double chamber includes a suction chamber capable of sucking airway secretions and a pressure regulation chamber for regulating the negative pressure in the airway, so that the negative pressure in the lower respiratory tract generated during the negative pressure suction process of the suction chamber can be adjusted by supplementing air through the pressure regulation chamber, which can effectively avoid the damage to the airway mucosa caused by excessive negative pressure and the risk of alveolar collapse after excessive air in the alveoli is sucked out. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the airway suction tube of the present utility model.

[0018] Figure 2 This is a perspective view of the gas and secretion flow directions of the airway suction tube of the present utility model.

[0019] Figure 3 This is a cross-sectional view of the overall structure of the airway suction tube of the present utility model.

[0020] Wherein: 1. Suction cavity, 2. Pressure regulation cavity, 3. Suction channel, 4. Pressure regulation channel, 5. Plug. Specific embodiments

[0021] In order to enable those of ordinary skill in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] The existing suction tube is a single-tube setting without an effective external air supply passage. When the negative pressure is too large or the suction time is too long, first, a large amount of gas in the lungs will be quickly and massively sucked out, which is likely to cause hypoxemia, airway mucosal bleeding, increased intracranial pressure, alveolar collapse, and even atelectasis, affecting the patient's treatment experience and prognosis; second, the pressure of the gas in the lungs after suction decreases or even forms a "negative pressure" environment, which is not conducive to the outward discharge of airway secretions and affects the clearance effect of airway secretions. To solve the above problems, the present application discloses an adjustable-pressure double-chamber airway suction tube, and the specific structure can be referred to Figures 1 - 3 and the written description part of the present application.

[0023] An adjustable-pressure double-chamber airway suction tube includes an airway suction tube. The appearance of the airway suction tube is a circular pipe with a length of 50 mm. The outer diameter of the suction tube is set to 12F and 14F according to different models. Inside the airway suction tube, there are a suction cavity 1 for sucking airway secretions and a pressure regulation cavity 2 for regulating the negative pressure in the airway. One side of the suction cavity 1 and one side of the pressure regulation cavity 2 inside the airway suction tube are adhesively connected. As Figure 1 shown, the heads of the suction cavity 1 and the pressure regulation cavity 2 start to separate after protruding from the airway suction tube, forming two independent inlets, and a pressure regulation channel 4 for facilitating the direct entry of external gas into the suction cavity 1 is provided near the end where the two are connected.

[0024] The suction cavity 1 can be connected to a negative pressure suction device to aspirate airway secretions; the pressure regulation cavity 2 is provided with a plug 5. After opening the plug 5, it can communicate with the atmosphere, and external air can be supplemented through the pressure regulation cavity 2 to adjust the negative pressure in the suction cavity 1 and the airway, which can effectively avoid the damage to the airway mucosa caused by excessive negative pressure and the risk of alveolar collapse after excessive air in the alveoli is aspirated. The gas flow direction is as Figure 2 and 3As shown by the arrow direction in the pressure regulation chamber 2, by opening the plug 5, air enters the interior of the pressure regulation chamber from the upper end of the pressure regulation chamber. When the air flows to the pressure regulation channel 4, it enters the suction chamber 1 through the pressure regulation channel 4. The flow directions of the airway secretions and the airway gas are as shown in Figure 2 and 3 As shown by the arrow direction in the suction chamber 1 in. When the suction chamber 1 and the pressure regulation chamber 2 are inserted into the airway and suction is performed, both the airway secretions and the airway gas enter the interior of the suction chamber 1 through the suction channel 3 on the other side of the suction chamber 1 and the opening at the end of the suction chamber 1, and then are discharged out of the body through the suction chamber 1.

[0025] More specifically, a plug 5 adapted to its inner diameter is connected above the pressure regulation chamber 2. The plug 5 and the pressure regulation chamber 2 are connected by a lace, and the end of the pressure regulation chamber 2 is a closed end. Under normal circumstances, the plug 5 needs to be plugged above the pressure regulation chamber 2. At this time, due to the combined action of the plug 5 and the closed end, the negative pressure in the suction chamber 1 and the pressure regulation chamber 2 remains in the initial state; when the suction chamber 1 is connected to a negative pressure suction device for negative pressure suction, if it is seen that the sputum fills the suction chamber 1 and is drawn outwards, the plug 5 is kept plugged on the pressure regulation chamber 2; if the sputum does not fill the suction tube 1 or no sputum is drawn out, it indicates that the gas in the lungs is being rapidly pumped outwards by the negative pressure suction device. At this time, the plug 5 needs to be removed to allow air to enter the interior of the pressure regulation chamber 2 from the exposed end opening of the pressure regulation chamber 2. The pressure regulation channel 4 of the pressure regulation chamber 2 facilitates the direct entry of external gas into the suction chamber 1, which is convenient for promoting the airway secretions to be discharged outwards more smoothly through the suction chamber 1, and for adjusting the negative pressure in the suction chamber 1 to avoid excessive negative pressure in the suction chamber 1 causing damage to the airway mucosa and a large amount of rapid extraction of the gas in the lungs through the suction chamber 1 resulting in hypoxemia and alveolar collapse, etc.

[0026] It should be noted that two suction channels 3 for sucking airway secretions are provided on the other side of the suction chamber 1, and the end of the suction chamber 1 is an open end. That is to say, the suction chamber 1 is not only provided with two suction channels 3 for sucking airway secretions, but also the airway secretions can be sucked through the open end at the end of the suction chamber 1. And in order to increase the area of the opening at the end of the suction chamber 1 and prevent blockage during the suction of secretions. In this application, the opening at the end of the suction chamber is designed as a 45-degree ramp opening, and the opening direction is on the same side as the pressure regulation chamber, and the end of the pressure regulation chamber is a closed end. For the specific structure, reference can be made to Figure 2 .

[0027] It should also be noted that the materials used for the suction chamber 1 and the pressure regulation chamber 2 in this application are both transparent PVC materials, which is convenient for observing the internal situation of the cavity.

[0028] Embodiment

[0029] When using the adjustable pressure double - lumen airway suction tube of the present application to aspirate airway secretions (commonly known as "sputum suction"), first connect the suction device. After the preparation work is completed, select a suction tube of appropriate size, insert the suction tube into the artificial airway, rotate the suction tube to aspirate the airway secretions. Note that the suction tube should not stay in the trachea for too long to avoid affecting breathing.

[0030] When the suction tube is inserted into the artificial airway, since the suction tube of the present application is a double - lumen design, both the suction cavity 1 and the pressure - regulating cavity 2 of the present application will enter the trachea. At this time, the plug 5 needs to be plugged above the pressure - regulating cavity 2. Due to the combined action of the plug 5 and the closed end, the negative pressure in the suction cavity 1 and the pressure - regulating cavity 2 remains in the initial state. When the suction cavity 1 is connected to the negative - pressure suction device to aspirate airway secretions, if it is seen that the sputum fills the suction cavity 1 and is drawn outwards, then keep the plug 5 plugged on the pressure - regulating cavity 2. If the sputum does not fill the suction cavity 1 or no sputum is drawn out, to avoid the rapid extraction of air in the lungs through the suction cavity 1, which may cause excessive negative pressure in the lungs, at this time, remove the plug 5, so that air enters the interior of the pressure - regulating cavity 2 from the exposed - end opening of the pressure - regulating cavity 2. The pressure - regulating channel 4 of the pressure - regulating cavity 2 facilitates the direct entry of external gas into the suction cavity 1, which is convenient for pushing the airway secretions to be discharged more smoothly through the suction cavity 1, and adjusts the negative pressure in the suction cavity 1 to avoid damage to the airway mucosa caused by excessive negative pressure in the suction cavity 1.

[0031] The adjustable pressure double - lumen airway suction tube of the present application is a disposable medical consumable. After aspirating the secretions, remove the suction tube from the artificial airway and discard it into the infectious medical waste collection container for centralized treatment as medical waste.

[0032] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above - mentioned embodiments. What is described in the above - mentioned embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure-adjustable double-lumen airway suction tube, comprising an airway suction tube, characterized in that: The airway suction tube comprises a suction chamber (1) for sucking secretions from the airway and a pressure regulating chamber (2) for regulating negative pressure in the airway, wherein the suction chamber (1) and the pressure regulating chamber (2) are connected; A plug (5) matching the inner diameter of the pressure regulating chamber (2) is connected to the top of the pressure regulating chamber (2); The end of the pressure regulating chamber (2) is a closed end; The suction chamber (1) and the pressure regulating chamber (2) are connected, and a pressure regulating channel (4) is provided near the end to facilitate external gas to directly enter the suction chamber.

2. The pressure-adjustable double-lumen airway suction tube according to claim 1, characterized in that: A plurality of suction channels (3) for sucking secretions from the airway are provided on one side of the suction chamber (1).

3. The pressure-adjustable double-lumen airway suction tube according to claim 2, characterized in that: The end of the suction chamber (1) is an open end.

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