When it comes to breathing filters, I believe all of us should have a certain understanding. In fact, the breathing filter is a filter used in the breathing circuit: it has the functions of different degrees of biofiltration heating and reducing the production of purified water, preventing the collapse of the small airways and atelectasis, and can reduce the suffocation Suction circuit microbial contamination, reduce nosocomial infection.

Clinical application: The application of artificial nose during general anesthesia and mechanical ventilation can reduce postoperative pulmonary infection and avoid cross infection. The use of artificial nose can also reduce the utilization rate of pulmonary complications in critically ill patients with breathing machine, and patients with postoperative tracheotomy should also use artificial nose, which is better for humidifying and warming inhaled gas and reducing pulmonary complications. role! Function: It can simulate the function of the nose, collect and retain the heat and water vapor in the exhaled gas. When inhaling, the gas is brought into the airway through the artificial nose, which is warm and humidified, so as to ensure that the airway obtains effective and appropriate moisture. At the same time, it has a certain filtering effect on bacteria, which can reduce the risk of the pipeline being contaminated by bacteria. After the establishment of an artificial airway (tracheal intubation or tracheotomy), the normal respiratory tract is lost due to the diversion of the respiratory tract. The function of regulating the temperature and humidity of the inhaled gas, directly inhaling the unheated and humidified gas, can cause the bronchial secretions to be thick, the sputum is not easy to cough up, aggravate the blockage of the respiratory tract, and cause lung infection. The incidence of tracheal blockage is 14%-45%, and other blockages are mainly due to excessive water loss! Insufficient airway humidification, dry airway mucosa, ciliary dyskinesia, and formation of phlegm scab and phlegm plug.

The principle of artificial nose operation: after the artificial airway is established, connect the artificial nose to the catheter port. The artificial nose should not be placed for too long, and it should not exceed 2 days for patients with good environment and less serious lung infection, otherwise it should be replaced within 24 hours. , If the inner core is polluted by sputum and blocked the throat, replace it at any time. When replacing, the principle of aseptic operation is strictly enforced, and the movements are gentle. The artificial nose cannot be reused, because once it has been cleaned and disinfected, the inner (lithium oxide) sponge will lose its warmth and humidity. Chemical effect, so after use, according to the principle of disposable items.

The use of closed suction tube and artificial nose: the outer end of the artificial airway is connected to a closed suction tube with a T-shaped opening, and the other end of the T-shaped is connected to the artificial nose. It can be sucked out in time. Second, the artificial nose is located at a high position and should not be adhered by sputum, which not only avoids inadvertent contamination by open sputum suction operation, prevents medical staff from being contaminated, but also reduces exogenous infection of patients, thereby reducing lung infection and pulmonary infection. Delay the occurrence of lung infection. For some diseases transmitted through the respiratory tract, artificial nose can prevent the patient's exhaled gas from spreading to the surrounding environment when using a ventilator or a sputum suction system, and will not transmit the virus to ICU medical staff and other patients. , has a good protective effect.