Emergency device for air leakage of artificial airway airbag

Abstract

The utility model discloses an emergency device for air leakage of an air bag of an artificial airway. The emergency device comprises an air guide tube, a first tee joint, a second tee joint, a pressure detector and a pressure relief piece, wherein the air guide tube is used for being connected with the air bag outside the artificial airway; the first tee joint and the second tee joint are arranged on the air guide tube; according to the emergency device, air can be continuously supplied to the air bag, the pressure of the air bag is 25-30 cm H2O, and part of patients who are seriously ill and are not suitable for immediately replacing the artificial airway can be temporarily prevented from being replaced; meanwhile, part of patients can safely pass through the time period from air leakage of the air bag to replacement of the artificial airway. The device is easy to understand in principle, simple to operate and reliable in clinical application, treatment risks are not increased, and other complications caused when artificial airways of some patients are replaced can be avoided; according to the utility model, all consumables are disposable sterile consumables which are commonly used in hospitals, so that the consumption is small and the price is low; the comprehensive groove oxygen source is used for continuously supplying oxygen and supplementing air, manual air inflation is not needed, and the workload of medical staff can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to an emergency device for air leakage in an artificial airway cuff. Background Technology

[0002] Invasive ventilation is one of the most important measures to maintain the lives of critically ill patients. Endotracheal intubation and tracheotomy to establish an artificial airway, and the integrity of the artificial airway, are crucial prerequisites for successful invasive ventilation. The artificial airway cuff is the most vulnerable part and therefore the most susceptible to damage. Any leakage can significantly impact respiratory support and resuscitation in critically ill patients. In actual clinical practice, the probability of artificial airway cuff leakage is not high, but it does occasionally occur. For patients with good intubation conditions and stable conditions, the endotracheal tube is usually replaced immediately. However, for some patients whose endotracheal tubes cannot be replaced immediately, how to ensure the continued normal use of an artificial airway with a leaking cuff, so that the patient's respiratory support is not interrupted due to airway replacement and the risks associated with reintubation is a pressing issue that needs to be addressed. Utility Model Content

[0003] The purpose of this invention is to provide an emergency device for airway cuff leakage, which addresses the issue of temporarily avoiding replacement for patients who are not suitable for immediate replacement of their artificial airway; and how to allow some patients to safely pass through the period from cuff leakage to artificial airway replacement.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model provides an emergency device for air leakage of an artificial airway airbag, including an air guide tube for connecting to the external airway airbag of the artificial airway, a first three-way valve and a second three-way valve disposed on the air guide tube, a pressure detector connected to the upper branch of the first three-way valve, and a pressure relief component connected to the upper branch of the second three-way valve.

[0006] The other end of the air duct is connected to an oxygen source.

[0007] Furthermore, an internal tube communicating with the airway airbag is provided within the artificial airway.

[0008] Furthermore, the main pipe of the first three-way valve is connected to the internal tube via a male Luer connector, and an indicator airbag is provided on the internal tube and located outside the artificial airway.

[0009] Furthermore, the second three-way valve is connected to the other end of the main pipe of the first three-way valve through the first connecting pipe; the other end of the second three-way valve is connected to an oxygen flow meter and a dry oxygen source through the second connecting pipe.

[0010] Furthermore, the pressure relief component includes a heparin cap and a syringe needle.

[0011] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0012] The emergency device in this invention can continuously replenish the airbag and maintain the airbag pressure at 25-30 cmH2O, which can temporarily avoid the need for replacement of artificial airways for some patients whose condition is critical and who are not suitable for immediate replacement; at the same time, it can allow some patients to safely get through the period from airbag leakage to replacement of artificial airways.

[0013] The principle of this invention is easy to understand, simple to operate, and reliable in clinical application. It does not increase treatment risks and can avoid other complications caused by replacing artificial airways in some patients. The pressure provided by this device is adjustable and constant, which can prevent medical VAP caused by excessively low pressure in the cuff or aggravated cuff damage caused by excessively high pressure, as well as secondary damage such as tracheal mucosal ischemia and necrosis. The consumables of this invention are all commonly used disposable sterile consumables in hospitals, with low usage and low price. It uses a combined oxygen tank for continuous oxygen supply and replenishment, eliminating the need for manual inflation and reducing the workload of medical staff. Although it uses a combined oxygen tank for continuous oxygen supply, the oxygen consumption is extremely low, avoiding excessive oxygen waste. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the main structure of the emergency device for air leakage of the artificial airway airbag of this utility model.

[0016] Explanation of reference numerals in the attached figures:

[0017] 100. Artificial airway; 101. Airway cuff; 102. Internal tube; 103. Indicator cuff.

[0018] 200, First tee; 201, First connecting pipe.

[0019] 300. Pressure detector.

[0020] 400, Second tee; 401, Second connecting pipe.

[0021] 500, Heparin Cap.

[0022] 600. Oxygen flow meter. Detailed Implementation

[0023] like Figure 1As shown, this embodiment discloses an emergency device for air leakage of an artificial airway cuff, including an air guide tube for connecting to the external airway cuff 101 of the artificial airway 100, a first three-way valve 200 and a second three-way valve 400 installed on the air guide tube, a pressure detector 300 connected to the upper branch pipe of the first three-way valve 200, and a pressure relief component connected to the upper branch pipe of the second three-way valve 400; wherein the other end of the air guide tube is connected to an oxygen source.

[0024] In this embodiment, the pressure detector 300, specifically an airbag pressure gauge, is used to monitor the pressure of the airway airbag 101 in real time. The pressure detector 300 detects the pressure inside the airway tube, and its pressure value is equivalent to the pressure of the airway airbag 101. By fine-tuning the oxygen flow meter flow rate and combining it with a three-way valve and pressure relief device, the pressure of the airway airbag 101 can be maintained at 25-30 cmH2O.

[0025] In specific implementation, in the prior art, an internal tube 102 connected to the airway airbag 101 is installed in the artificial airway 1; an indicator airbag 103 is installed on the internal tube 102.

[0026] The air delivery tube includes a first connecting tube 201 and a second connecting tube 401; wherein the first connecting tube 201 is a pressure extension tube; and the second connecting tube 401 is a regular infusion extension tube.

[0027] The second three-way valve 400 is connected to the other end of the main pipe of the first three-way valve 200 through the first connecting pipe 201; the other end of the second three-way valve 400 is connected to an oxygen flow meter 600 and a dry oxygen source through the second connecting pipe 401.

[0028] In this embodiment, because the second three-way connector 400 is designed with a steel needle, and a pressure extension tube with a length of approximately 155cm is used between the two three-way connectors, the second three-way connector 400 can be properly fixed in a position away from the patient's bed unit, avoiding the risks to the patient posed by the steel needle. Specifically, the second three-way connector 400 can also be a closed Y-type indwelling needle as an alternative; in use, both the first connecting tube 201 and the second connecting tube 401 are pressure extension tubes.

[0029] In use, the dry oxygen source is connected to the oxygen flow meter 600. The outlet of the oxygen flow meter 600 supplies air to the built-in tube through the air guide tube, thereby ensuring the internal air pressure of the airway bladder 101 and overcoming the problem of poor sealing of the artificial airway 1 caused by local leakage of the airway bladder 101. In addition, the oxygen flow meter 600 is used to measure the flow rate of oxygen per unit volume in the gas.

[0030] In this embodiment, the pressure relief component includes a heparin cap 500 and a syringe needle, thereby achieving pressure relief regulation within the airway by means of the heparin cap 500 and the syringe needle, specifically a 1ml syringe needle.

[0031] Safety test of continuous pressure controlled gas supply device:

[0032] Before clinical application of the device, the cuff pressure was measured when the oxygen flow rate was 0.1 L / min. The pressure was measured by connecting a cuff pressure gauge to the side port of the first three-way valve 200, and the pressure was 29 cmH2O. We simulated 20 cases of artificial airway cuff leakage (by puncturing three holes at different locations on the cuff with a 4.5 gauge needle). The results showed that the pressure inside the cuff was approximately 26 cmH2O, and the pressure value remained constant with a constant flow rate.

[0033] Indications and usage of continuous pressure controlled gas supply devices:

[0034] In clinical practice, when patients repeatedly experience a decrease in tidal volume and low-pressure alarms on the ventilator during respiratory support therapy, and other factors have been ruled out and it has been confirmed that the leak is in an unobservable part of the airway, and the patient cannot have their artificial airway replaced temporarily due to their condition, the above-mentioned continuous pressure-controlled ventilation device can be connected. The oxygen flow rate can be adjusted according to the degree of leakage in the cuff. As long as the pressure of the first three-way 200 side branch (i.e., the cuff pressure) is maintained at 25-30 cmH2O, it is sufficient.

[0035] Clinical applications of continuous pressure-controlled gas supply devices:

[0036] Between March 2019 and March 2024, the Intensive Care Unit of our institution admitted 737 critically ill patients requiring invasive respiratory support. Among them, 15 patients had airway leaks, including 6 cases with observable external leaks. In August 2023, one case involved a cuff inflation cable accidentally cut during oral care, which was corrected using an indwelling intravenous catheter. Nine cases had unobservable airway leaks. In 6 of these cases, the artificial airway was immediately replaced. Three of these were critically ill patients whose conditions prevented immediate airway replacement; in these cases, a continuous pressure-controlled ventilation (CPV) device was immediately connected, with satisfactory results. This not only maintained the cuff pressure within the normal range, ensuring continuous mechanical ventilation, but also minimized treatment risks.

[0037] Meanwhile, it was surprisingly discovered that the oxygen flow rate of the three patients was different from that used in the preclinical safety test of the device. The flow rate setting was far lower than 0.1L / min. It was even impossible to determine whether the oxygen flow rate was open by observing the float. Only when the pressure relief device was placed in water could a continuous stream of tiny bubbles be observed to overflow from the needle. By finely adjusting the oxygen flow rate, the pressure of the air bladder could be maintained at 25-30cmH2O.

[0038] When using the device to maintain normal cuff pressure: If the leak is under the cuff, patients whose conditions are critical and require immediate replacement of the artificial airway have high ventilator support parameters and high airway support pressure, resulting in a smaller pressure difference between the inside and outside of the cuff and thus reducing the leakage rate. If the leak is at the point where the cuff contacts the airway mucosa, the leak is reduced because the cuff is always under pressure and the leaking area adheres tightly to the mucosa. If the leak is on top of the cuff, the small amount of secretions that cannot be completely cleared from the cuff increases resistance to the leak, thus reducing the leakage rate. It should also be considered that the degree of damage to the cuff within the airway is less than the degree of artificial damage to the cuff during the experiment, leading to a significant difference in leakage rates.

[0039] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An emergency device for airway airbag leakage, characterized in that: It includes an air tube for connecting an external airway cuff (101) to an artificial airway (100), a first three-way valve (200) and a second three-way valve (400) disposed on the air tube, a pressure detector (300) connected to a branch pipe of the first three-way valve (200), and a pressure relief component connected to a branch pipe of the second three-way valve (400); The other end of the air duct is connected to an oxygen source.

2. The emergency device for air leakage of the artificial airway airbag according to claim 1, characterized in that: An internal tube (102) communicating with the airway airbag (101) is provided inside the artificial airway (100), and an indicator airbag (103) is provided on the internal tube (102) and located outside the artificial airway (100).

3. The emergency device for air leakage of the artificial airway airbag according to claim 2, characterized in that: The main pipe of the first three-way connector (200) is connected to the indicator airbag (103) via a male Luer connector.

4. The emergency device for air leakage of the artificial airway airbag according to claim 3, characterized in that: The second three-way valve (400) is connected to the other end of the main pipe of the first three-way valve (200) through the first connecting pipe (201); the other end of the second three-way valve (400) is connected to an oxygen flow meter (600) and a dry oxygen source through the second connecting pipe (401).

5. The emergency device for air leakage of the artificial airway airbag according to claim 4, characterized in that: The pressure relief components include a heparin cap (500) and a syringe needle.

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