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Bronchial hyperresponsiveness (or other combinations with airway or hyperreactivity, BH used as a general abbreviation) [1] is a state characterised by easily triggered bronchospasm (contraction of the bronchioles or small airways).
The tone of respiratory muscle is believed to be modulated by muscle spindles via a reflex arc involving the spinal cord. Drugs can greatly influence the rate of respiration. Opioids and anesthetics tend to depress ventilation, by decreasing the normal response to raised carbon dioxide levels in the arterial blood.
Symptoms include chest tightness, rapidly progressive dyspnea (shortness of breath), dry cough, use of accessory respiratory muscles, fast and/or labored breathing, and extreme wheezing. It is a life-threatening episode of airway obstruction and is considered a medical emergency. Complications include cardiac and/or respiratory arrest.
Respiratory arrest is a serious medical condition caused by apnea or respiratory dysfunction severe enough that it will not sustain the body (such as agonal breathing). Prolonged apnea refers to a patient who has stopped breathing for a long period of time.
Peripheral chemoreceptors (carotid and aortic bodies) and central chemoreceptors (medullary neurons) primarily function to regulate respiratory activity. This is an important mechanism for maintaining arterial blood pO2, pCO2 , and pH within appropriate physiological ranges.
Rocha says that at the clinic he sees first contact outpatients for people who come for wellness visits such as physicals and also for short visits due to illness, whether for respiratory tract ...
This results in a raised Alveolar-arterial (A-a) gradient which is responsive to supplemental oxygen. In conditions with right to left shunts, there are also ventilation perfusion defects with high A-a gradients. Hypoxemia is difficult to correct with supplemental oxygen and is associated with a widened A-a gradient.
Respiratory illnesses on rise. The Illinois Department of Public Health has announced that the state’s overall respiratory illness level has moved up from Low to Moderate, meaning that ...
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