What is difficulty breathing?

We sometimes encounter patients subjective feel insufficient gas, chest to chest or breathing difficulty, objective observation of patients with tachypnea, respiratory mobility increased, open mouth breathing, nasal Alar incitement, phenomena such as orthopnea, a condition known as dyspnea, commonly known as \"shortness\".

Respiratory difficulties, it is easy to see the respiratory muscles and respiratory secondary muscle took part in the respiratory movement. In this case, only when people work, strenuous exercise, or emotional circumstances appear, called enhanced breathing on the physiological. Pathological cases of respiratory difficulties, common in all types of hypoxia and metabolism of patients with hyperthyroidism (such as high fever, hyperthyroidism), acidosis (such as diabetes, uremia) and central nervous system dysfunction (such as encephalitis, cerebral Vasospasm, intracranial pressure high), and so on, these patients even in slight physical activity or quiet State, also have significant difficulty in breathing.

Breathing difficulty is the basic principle of exaltation of the respiratory center. Why Central overstimulation of breathing occurs it? mainly because of the blood oxygen partial pressure reduced, blood pH is decreased partial pressure of carbon dioxide rise, excitement, caused by direct or reflected respiratory Central overstimulation. Encephalitis, when elevated intracranial pressure, due to inflammation and mechanical stimuli directly excited respiratory Central may also cause breathing difficulties.