Why does severe angioedema, characterized by rapid swelling, potentially cause airway obstruction during anaphylaxis?

💡 Explanation

Histamine release from mast cells during anaphylaxis causes increased vascular permeability within the laryngeal mucosa, because this mechanism results in fluid extravasation and rapid tissue swelling. Therefore, airway obstruction occurs, rather than vasodilation caused by the complement cascade or direct bronchodilation by epinephrine.

• Which outcome occurs during the inflammatory phase after rotator cuff tendon microtears?
• If osteocytes within bone experience reduced mechanical loading due to prolonged bed rest, which consequence follows concerning bone density?
• Why does autoimmune demyelination in nervous tissue lead to slower action potential propagation?
• Why does prolonged stress impair the effectiveness of influenza vaccines?
• Why does increased venous pressure in leg veins, such as in varicose veins, often lead to edema in the ankles?
• Which outcome occurs with tibia overload during gait?