Patients with severe snoring and obstructive sleep apnea syndrome need to use non-invasive ventilator for a long time, or some patients have not reached the level of severe obstructive sleep apnea, but there are cardiovascular and cerebrovascular diseases such as hypertension in combination, they also need to use non-invasive ventilator for a long time in order to achieve the ideal treatment effect. So what do you need to pay attention to in the process of use? (1) Install the filter membrane. A dust filter membrane should always be installed when the machine is working. Patients who are allergic to tobacco-generated smoke or other particles can use an ultra-clean filter membrane, and never insert a wet filter membrane into the ventilator. (2) Before using the ventilator, you should consult your doctor about your therapeutic pressure, adjust the pressure level suitable for you, and contact your doctor promptly if you are uncomfortable during the wearing process. (3) If you use a nasal mask with a leaky port, you can directly connect the nasal mask to the tubing; if you use a nasal mask without a leaky port, you need to connect the nasal mask to the tubing with a separate leaky connector, paying attention to the direction of the connection of the leaky port, which should ensure that the leaking gas is away from the patient. Avoid the exhaled air blowing on the head and face, causing discomfort. Please do not block the air leakage port while the ventilator is working. Check frequently to prevent the air vent from being blocked. If using a mask that can cover the nose and mouth at the same time, the mask must have a safety valve to prevent the patient from suffocating in case of power failure. (4) The respirator needs to be cleaned regularly after long-term use. To prevent electric shock, the ventilator should be disconnected and then cleaned. Never place the machine in various liquid environments. Just as wearing glasses for the first time can be uncomfortable, it is possible to feel uncomfortable when wearing a non-invasive ventilator for the first time. The most common discomfort is a bit of stuffiness. This is because a certain amount of air pressure is generated into the airway as the ventilator operates. When inhaling, the pressure pushes the gas into the lungs, making it easier to inhale, but when exhaling, the pressure prevents the gas from exiting the body, making it feel a bit stuffy. Usually, this feeling of breathlessness will disappear after a few days. If you feel stuffy all the time, it is recommended that you go to the hospital to have the pressure titrated again and to check for any other combined cardiopulmonary disorders. Most patients with sleep apnea syndrome have dry mouth before treatment, which is related to open-mouth breathing during long periods of time, and patients sometimes have dry oropharynx during ventilator treatment, which may be related to air leakage through the mouth. A jaw brace or nasal mask can be tried. A more effective method is to add a heated humidifier to humidify and warm the inhaled gas. Some patients may experience nasal congestion after wearing the ventilator, which can be treated with nasal spray (normal saline) nasal moistening spray and topical nasal hormone first, and then use the ventilator after the symptoms are relieved. The process of using the ventilator may cause local pressure on the face or have allergic symptoms. This is manifested by contact between the mask and the skin as redness, swelling, itching, or even blisters and skin breakdown. Please check whether the size of the mask you choose is appropriate; whether the headband is fixed too tight; and also check whether your skin has an allergic reaction to a certain mask material, otherwise you should change to a mask of other material in time.