CBC
Chemistry
LDH elevation - sensitive but not specific
ABG
CD4 count
CXR - bat wing appearance (bilat interstitial infiltrates)
A-a gradient
P(A-a)O2 = 150 – (PaCO2/0.8) – PaO2 at sea level on RA (normal is <10 in young, healthy patients)
Increased in PCP pneumonia secondary to decreased diffusion thru thick aveoli
P(A-a)O2 = 150 – (PaCO2/0.8) – PaO2 at sea level on RA (normal is <10 in young, healthy patients)
Increased in PCP pneumonia secondary to decreased diffusion thru thick aveoli
Imaging
CXR
Normal in 25% of cases
Diffuse, interstitial infiltrates
CT Chest
Sn 100%, Sp 89%
May see ground glass infiltrative pattern
CXR
Normal in 25% of cases
Diffuse, interstitial infiltrates
CT Chest
Sn 100%, Sp 89%
May see ground glass infiltrative pattern
Normal in 25% of cases
Diffuse, interstitial infiltrates
Sn 100%, Sp 89%
May see ground glass infiltrative pattern
Pneumocystis jirovecii pneumonia
Pulmonary
Tuberculosis
Airway obstruction
CMV pneumonia
Anaphylaxis
Histoplasmosis
Angioedema