Resp: Respiratory Failure: Free MSRA Podcast

🫁FREE MSRA PODCAST –Respiratory FailureA complete,high-yield guide to understanding and revising one of the most criticalrespiratory emergencies: respiratory failure. 🧠Key Learning Points📌Definition• Respiratory failure = Failure of the lungs toperform effective gas exchange• Two main types: — Type 1 (Hypoxaemic): ↓ PaO₂ < 8kPa, normal/low PaCO₂ — Type 2 (Hypercapnic): ↑ PaCO₂ > 6kPa, oftenwith ↓ PaO₂• Acute, chronic,and acute-on-chronic presentations 📌CausesType 1: • Pneumonia • Pulmonary oedema • ARDS • PE • Asthma • Pulmonaryfibrosis • Pneumothorax • COPD (hypoxaemicpresentation) • Cyanoticcongenital heart disease • Kyphoscoliosis,obesityType 2: • COPD (hypercapnicpresentation) • Severe asthma • Neuromusculardisorders (e.g. MND, MG) • CNS depression(e.g. opioid overdose) • Obesityhypoventilation • Hypothyroidism • Chest wall trauma 📌Risk Factors• Advanced age• Pre-existinglung/heart disease• Obesity• Smoking• Immunosuppression• Sedatives/opioids• Environmentalpollutants• Prolongedventilation 📌PathophysiologyType 1:• V/Q mismatch, shunting → hypoxaemiaType 2:• Alveolar hypoventilation → CO₂ retention → respiratory acidosis 📌Symptoms• Dyspnoea• Tachypnoea• Cyanosis• Confusion orreduced GCS• Tachycardia• Signs of rightheart strain or cor pulmonale in chronic cases 📌Diagnosis🧪Arterial Blood Gas(ABG): • Confirmshypoxaemia/hypercapnia🩻Imaging: • CXR or CT chest →identify pneumonia, oedema, pneumothorax, PE🩸 Bloods: • FBC, U&Es,LFTs, TFTs, CRP, troponin, CK🫀 ECG + Echo: • Cardiac causes🧪 Other: • Spirometry (ifstable), V/Q scan, right heart cath in complex cases • BAL or biopsy ifdiagnosis unclear • Microbiology:sputum/blood cultures 📌Management• Treat underlying cause: e.g. antibiotics forpneumonia, diuretics for fluid overload• Oxygen therapy: Aim SaO₂ > 90%, PaO₂ ≥ 8 kPa – Use caution in chronic CO₂ retainers (COPD) – risk ofworsening hypercapnia• Ventilation: — Non-invasive ventilation (NIV) for COPD,cardiogenic pulmonary oedema — Intubation + mechanical ventilation if severe — ECMO in refractory cases• Monitor closely: ABGs, signs of deterioration• Supportive care: Fluids, nutrition, DVTprophylaxis 📌Prognosis• Depends on cause,severity, and response to treatment• Early recognition and management are key• Chronic cases mayneed long-term oxygen or home NIV• Mortality higherin ICU settings and those with organ failure 📌Complications• ARDS•Ventilator-associated pneumonia (VAP)• Barotrauma (e.g.pneumothorax)• Cor pulmonale(right heart failure)• Acute kidneyinjury• Stress ulcers, GIbleed• Electrolyte andacid-base disturbances• Malnutrition• Sepsis• Death 📎More RespiratoryFailure MSRA Resources:📝 Revision Notes: https://www.passthemsra.com/topic/respiratory-failure-revision-notes/🧠 Flashcards: https://www.passthemsra.com/topic/respiratory-failure-flashcards/💬 Accordion Q&A Notes: https://www.passthemsra.com/topic/respiratory-failure-accordion-qa-notes/🚀 Rapid Quiz: https://www.passthemsra.com/topic/respiratory-failure-rapid-quiz/🎓 Respiratory Course: https://www.passthemsra.com/courses/respiratory-for-the-msra/ Hashtags#MSRA#RespiratoryFailure #MSRARevision #RespiratoryMSRA #Hypoxaemia #Hypercapnia#ABG #MSRAFlashcards #NICEGuidelines #MedicalEducation #MSRAOnlineRevision#PassTheMSRA