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Prolonged exposure to relatively low levels of nitrogen (II) oxide may cause persistent headaches and nausea. [18] Like chlorine gas poisoning, symptoms usually resolve themselves upon removal from further nitrogen dioxide exposure, unless there had been an episode of severe acute poisoning. [19] Treatment and management vary with symptoms.
Acute harm due to NO 2 exposure is rare. 100–200 ppm can cause mild irritation of the nose and throat, 250–500 ppm can cause edema, leading to bronchitis or pneumonia, and levels above 1000 ppm can cause death due to asphyxiation from fluid in the lungs. There are often no symptoms at the time of exposure other than transient cough, fatigue ...
The role for eNO in other conditions is even less well established compared to asthma. Since asthma can be a cause of chronic coughing (it may even be the sole manifestation, such as in cough-variant asthma), studies have looked at whether eNO can be used in the diagnosis of chronic cough. [18] [19] [20] [21]
Although the cause of this type of asthma is specific to allergens, the symptoms (wheezing, coughing and difficulty breathing) are no different than other types of asthma, so the treatment is ...
There is strong evidence that NO x respiratory exposure can trigger and exacerbate existing asthma symptoms, and may even lead to the development of asthma over longer periods of time. It has also been associated with heart disease, diabetes, birth outcomes, and all-cause mortality, but these nonrespiratory effects are less well-established. [29]
The most common signs and symptoms of an asthma attack include coughing, shortness of breath, feeling winded, a tightening in the chest, and a wheezing that makes a high-pitched whistling sound ...
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