7 results
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
Wall Elasticity (flail ... chest) • Low ... , Interstitial Lung ... UnremarkableLab #AA ... Hypoxia #hypoxemia #differential
Pulmonary Renal Syndrome

Definition: Diffuse alveolar hemorrhage + Glomerulonephritis
Presentation (Pulmonary and renal manifestations can occur weeks apart):
: Diffuse alveolar ... allopurinol), Infection ... high resolution chest ... , biopsy By Tess ... #differential #
Lung Abscess - Diagnosis and Management Summary

Lung Abscess Etiology:
 • Necrosis of lung parenchyma by a
polymicrobial infection ... Aeruginosa - Strep ... Abscess Differential ... #Abscess #pulmonary ... #differential #
Pulmonary Renal Syndromes - OnePager Summary
Autoimmune ANCA vasculitis (AAV): GPA (granulomatous with polyangiitis), EGPA (eosinophilic granulomatosis
Other tests: • CT chest ... confirm DAH, r/o infection ... leading to diffuse alveolar ... sparing of the lung ... #differential #
Lung Infections in HIV - Differential Diagnosis Framework

Disease by CD4 Count:
Any CD4 Count:
 • Mycobacterium tuberculosis,
Lung Infections ... in HIV - Differential ... phagocytic function of alveolar ... #AIDS #pulmonary ... #differential #
Differential Diagnosis of Respiratory Acid-Base Disorders
Alkalosis
A. Central nervous system stimulation: Pain, Anxiety, psychosis, Fever, Cerebrovascular accident,
Differential Diagnosis ... receptors: Hemothorax, Flail ... chest, Cardiac ... sedatives), Stroke, Infection ... syndrome, Barotrauma
Amiodarone Induced Lung Toxicity Summary

Who?
• 5% of patients
• Dose ≥ 400 mg per day

How?  Possible
acute respiratory distress ... syndrome) is rare ... Pleuritic chest ... macrophages in alveolar ... failure - Infectious