pathophysiology5 Respiratory system: Asthma Asthma: Characterized by periodic episodes of severe but reversible bronchiole obstruction due to hyperresponsive airways. Problem: occurs in upper airway - obstruction to the airflow of decrease alveolar ventilation. 1) Bronchoconstriction 2) Inflammation of bronchiole mucosa - Edema 3) Excess mucous production-clogs airway Two Types: 1. Extrinsic Asthma (inflammatory) Could by hypersensitivity.. 2020. 12. 8. Respiratory System: Atelectasis Atelectasis Collapse or incomplete expansion of a lung or a portion of a lung, leading to decreased gas exchange and hypoxia Can be caused by: airway obstruction compression of the lung â surfactant à difficulty expanding the lung When the alveoli do not have air, they collapse and shrivel up ~ natural recoil of lung tissue Ventilation and perfusion are affected à impaired oxygenation Signs and .. 2020. 12. 3. Respiratory system: Aspiration Aspiration Aspiration: the passage of food, fluid, or other foreign material into the trachea or lungs Usually, the cough reflex removes material from the upper tract, and passage into the lower tract is prevented by the vocal cords and epiglottis Complete obstruction of the upper tract inhibits the ability to speak or cough; blockage of the trachea is life-threatening due to inadequate oxygenat.. 2020. 12. 3. Left & Right-sided Heart Failure Etiology of Left-sided CHF · Left ventricular failure can result from: 1) Volume overload: Occurs with regurgitant mitral or aortic valves, and high-output states such as anemia & hyperthyroidism 2) Pressure overload: occurs with hypertension & aortic stenosis 3) Loss of muscle mass: examples include left ventricular MI & inflammatory diseases like lupus 4) Loss of contractility: Can occur as a .. 2020. 11. 21. 이전 1 2 다음 반응형
