Acute Exacerbation of Asthma

Acute asthma exacerbation is an acute worsening of airway inflammation and bronchoconstriction, leading to airflow obstruction, air trapping, increased work of breathing, hypoxaemia, and possible ventilatory failure. In this video, we simplify acute asthma from the basics, linking the pathophysiology to the clinical signs, severity classification, investigations, and emergency management. We also explain why a “normal” or rising PaCO₂ in severe asthma is a dangerous sign of fatigue and impending respiratory failure. We will cover: Definition of acute asthma exacerbation Triggers and airway inflammation Bronchoconstriction, mucus plugging, and air trapping Dynamic hyperinflation and increased work of breathing Moderate, acute severe, life-threatening, and near-fatal asthma PEF, SpO₂, respiratory rate, pulse, and speech assessment Why silent chest is a critical warning sign When to check ABG and chest X-ray Differentiating severe asthma from other causes of acute breathlessness Initial treatment with oxygen, salbutamol, ipratropium, corticosteroids, and IV magnesium Key discharge criteria and follow-up after an asthma attack NICE NG244 signposts acute asthma management to the BTS/SIGN acute asthma recommendations, including objective severity assessment, oxygen targeting, bronchodilators, systemic steroids, escalation for life-threatening features, and safe discharge planning. ([NICE][1]) This video is designed for medical students, MRCP candidates, junior doctors, and anyone trying to understand acute asthma exacerbation in a simple, clinically relevant way. Disclaimer: This video is for educational purposes only and is not a substitute for professional medical advice or specialist clinical guidance. #AcuteAsthma #RespiratoryMedicine #MRCP #MedicalEducation #MRCPology acute asthma exacerbation, acute asthma explained, acute asthma MRCP, severe asthma, life threatening asthma, near fatal asthma, asthma attack, bronchoconstriction, airway inflammation, mucus plugging, dynamic hyperinflation, air trapping, hypoxaemia, hypercapnia, normal PaCO2 severe asthma, silent chest, pulsus paradoxus, wheeze, shortness of breath, respiratory failure, salbutamol, ipratropium, corticosteroids, IV magnesium sulphate, asthma ABG, asthma PEF, asthma SpO2, COPD exacerbation, anaphylaxis, pneumonia, pneumothorax, pulmonary embolism, respiratory medicine, MRCP revision, medical students, internal medicine, clinical medicine