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Very severe acute asthma (termed "near-fatal" as there is an immediate risk to life) is characterised by a peak flow of less than 33% predicted, oxygen saturations below 92% or cyanosis (blue discoloration, usually of the lips), absence of audible breath sounds over the chest ("silent chest" : wheezing is not heard because there is not enough ...
Chest congestion is usually caused by excess mucus in the airways, says Meilan King Han, M.D., M.S., professor of medicine and chief of the Division of Pulmonary and Critical Care at the ...
The classic symptoms are shortness of breath, wheezing, and chest tightness. [20] The wheezing is most often when breathing out. [109] While these are the primary symptoms of asthma, [110] some people present primarily with coughing, and in severe cases, air motion may be significantly impaired such that no wheezing is heard. [108]
Brittle asthma is a type of asthma distinguishable from other forms by recurrent, severe attacks. [ 1 ] [ 2 ] [ 3 ] There are two subtypes divided by symptoms: Type 1 and Type 2, [ 4 ] depending on the stability of the patient's maximum speed of expiration, or peak expiratory flow rate (PEFR).
Asthma triggers are factors or stimuli that provoke the exacerbation of asthma symptoms or increase the degree of airflow disruption, which can lead to an asthma attack. [1] An asthma attack is characterized by an obstruction of the airway , hypersecretion of mucus and bronchoconstriction due to the contraction of smooth muscles around the ...
So, if you have chills along with other common Covid symptoms, such as a sore throat, runny nose, nausea and vomiting, fatigue, cough, or diarrhea, it’s worth taking a Covid test, says Dr ...
The mechanisms behind allergic asthma—i.e., asthma resulting from an immune response to inhaled allergens—are the best understood of the causal factors. In both people with asthma and people who are free of the disease, inhaled allergens that find their way to the inner airways are ingested by a type of cell known as antigen-presenting ...
Asthma is a common condition and affects over 300 million people around the world. [3] Asthma causes recurring episodes of wheezing, breathlessness, chest tightness, and coughing, particularly at night or in the early morning. [4] Exercise-induced asthma is common in asthmatics, especially after participation in outdoor activities in cold weather.
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