Venturi mask is a kind of Venturi device, which is an oxygen mask made according to Venturi effect. Its principle is that low pressure will be generated near the high-speed flowing fluid, which will lead to adsorption, so the Venturi oxygen mask can provide higher oxygen flow and accurate oxygen concentration. Compared with ordinary oxygen mask, Venturi mask has many advantages, but it needs to be monitored in real time under high oxygen flow to avoid airway mucosa dryness. The used oxygen mask belongs to infectious waste and needs to be disposed of properly. Let's take a look at the Venturi mask. 1. What is a Venturi mask?

Venturi mask refers to an oxygen therapy device that uses Venturi principle to mix a certain flow of air with oxygen to form a high-speed airflow and then deliver it to patients. As a large-flow oxygen supply system, Venturi mask can provide up to 50% oxygen concentration, and the oxygen flow rate is above 40L/min. It has the characteristics of large flow rate and accurate oxygen concentration, and is widely used in clinic.

The principle of Venturi mask is that when a certain flow of oxygen passes through a nozzle with a small cross-sectional area, the flow speed increases to form a high-speed airflow, which generates a certain negative pressure and then gets involved in the surrounding air, and finally forms a large flow of air-oxygen mixed airflow. According to its principle, the inhaled oxygen concentration is related to the nozzle diameter, inlet diameter and oxygen flow rate, so the Venturi mask can realize different oxygen concentrations by adjusting these parameters.

2. What are the advantages and disadvantages of Venturi oxygen mask compared with ordinary mask?

Compared with ordinary masks, the biggest advantage of Venturi oxygen mask is that it can provide higher flow rate and higher oxygen concentration accuracy. On the one hand, when the provided flow rate is higher than the peak inspiratory flow rate of the patient, the patient will not inhale the surrounding air, thus ensuring the stable and accurate control of oxygen concentration. On the other hand, a large flow of gas can have a certain scouring effect on the gas exhaled by patients to prevent repeated breathing.

However, the disadvantage of Venturi oxygen mask is also obvious, that is, a large flow of air may cause airway mucosa dryness, so we should pay attention to monitoring the patient's condition in real time when using it.

3. What kind of waste does the used oxygen mask belong to?

The oxygen mask used by patients belongs to infectious waste.

According to the Classified Catalogue of Medical Wastes, infectious wastes are characterized by carrying pathogenic microorganisms and causing the spread of infectious diseases. Articles contaminated by patients' blood, body fluid zd and excreta belong to infectious wastes, including cotton balls, cotton swabs, drainage cotton strips, gauze and other dressings. Disposable sanitary articles, disposable medical articles and disposable medical devices; Waste clothes; Other articles contaminated by the patient's blood, body fluids and excreta.

The oxygen mask used by patients belongs to disposable medical devices and is regarded as disposable infectious waste, which needs to be treated to avoid cross-infection.