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Asthma Exacerbation (Early Phase Pathophysiology (Hypoxemia, Respiratory…
Asthma Exacerbation
Epidemiology
1.7 million ER visits
3,518 deaths
Early Phase Pathophysiology
Hypoxemia
Respiratory alkalosis
Activation of immune response
Clinical Presentation
Moderate
Worsening symptoms
PFM rate 35%-50%
Severe
Accessory breathing muscles
Apprehension
Air hunger
Inability to complete sentences
Inability to lie flat
Diaphoresis
Tachycardia, tachypnea
Obtundation
Cyanosis
Absence of wheezing
Silent chest
PFM rate < 35%
Mild
Chest tightness
Coughing
Wheezing
Increasing dyspnea
PFM rate 50%-79%
Treatment
Moderate
Oxygen
Oral corticosteroid
SABA via MDI or neb
Severe
Intubation and ventilation
Emergency stabalization medications
Mild
SABA via MDI
Late Phase Pathophysiology
Hypercapnia
Respiratory acidosis
Reactivation of immune response
Diagnosis
PFM rate
Arterial blood gas levels