24 results
Causes of Polycythemia (Erythrocytosis) - Differential Diagnosis Algorithm
Relative - Normal RBC Mass / Decreased Plasma Volume
Relative - Normal ... Positive - Low/Normal ... Saturation 90%, Abnormal ... carboxyhemoglobin, Abnormal ... Heart Disease Abnormal
Pulmonary Function Tests (PFTs) - Interpretation Algorithm
 • Normal
 • Pulmonary Hypertension, Anemia, Carboxyhemoglobinemia
 • Chest
Interpretation Algorithm ... • Normal • ... Carboxyhemoglobinemia • Chest ... • Interstitial Lung ... Interpretation #Algorithm
Pulmonary Pathology and Associated Lung Ultrasound Findings
Pneumothorax:
 - No lung sliding/barcode sign
 - Lung point (hard
sliding/barcode sign ... bilateral B-lines - Normal ... unilateral B-lines - Normal ... #differential # ... diagnosis #signs
Chronic Cough - Differential Diagnosis Algorithm
Red Flags:
 • Fever, night sweats, chills (infection)
 • Weight loss,
Chronic Cough - Differential ... Diagnosis Algorithm ... in cough) • Abnormal ... lymadenopathy, clubbing, chest ... exam, etc) • Abnormal
Hypercalcemia - Differential Diagnosis Algorithm
Elevated PTH (High or normal):
 • Primary Hyperparathyroidism
 • Familial Hypocalciuric Hypercalcemia
Low
Hypercalcemia - Differential ... Diagnosis Algorithm ... Elevated PTH (High or normal ... Solid Tumors: Lung ... renal, Bladder, Breast
Mosaic attenuation
The term 'mosaic attenuation' is used to describe density differences between affected and non-affected lung
which part is abnormal ... process adjacent to normal ... lung - Normal lung ... #CTChest #MosaicAttenuation ... #Attenuation #Differential
Head Cheese Sign on Chest CT
 • Juxtaposition of distinct radiographic areas of low, normal and
Head Cheese Sign ... distinct radiographic areas ... of low, normal ... #Head #Cheese #Sign ... #CT #Lung #Pulmonary
Shock - Differential Diagnosis Algorithm
Warm Extremities
 - Distributive Shock - Low JVP
Shock - Differential ... Diagnosis Algorithm ... Shock - Bibasilar Lung ... Obstructive Shock - Normal ... Sounds • Pulmonary
Hypoxemia Differential Diagnosis Algorithm by A-a Gradient

Normal A-a Gradient:
 • ↓ Atmospheric pressure
 • Hypoventilation: CNS
Hypoxemia Differential ... Diagnosis Algorithm ... A-a Gradient Normal ... neuromuscular disease, ↓ chest ... #pulmonary #Aa
Approach to the A-a Gradient
A-a gradient = PAO2 - PaO2
A-a gradient = [FiO2 x (Patm -
/0.8)] - PaO2 Normal ... A-a gradient to normal ... Embolism, Obstructive Lung ... , Interstitial Lung ... Hypoxia #hypoxemia #differential