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clinical radiology diagnosis radiologyassistant table pulmonary cxr differential covid19 criticalcare pocus coronavirus cardiology management sarscov2 groundglass pattern lung respiratory ultrasound
Approach to the A-a Gradient A-a gradient = PAO2 - PaO2 A-a gradient = [FiO2 x (Patm -
A-a gradient = PAO2 ... - PaO2 A-a gradient ... /0.8)] - PaO2 Normal ... Weakness, Loss of Chest ... Elasticity (flail chest
ABG vs VBG: Arterial vs Venous Blood Gases ABG PROS: Tells you exactly what the arterial environment looks
looks like (pH, PaCO2 ... #Correlation #Comparison ... #pH #pCO2 #Diagnosis
Hypoxemia vs Hypoxia Hypoxemia - Partial pressure of arterial oxygen (PaO2) is below normal Hypoxia - Insufficient oxygen
arterial oxygen (PaO2 ... compensate for low PaO2 ... differential #diagnosis #comparison
PLACO Mnemonic - Approach to Acid-Base Disorders P - Determine the pH L - Labs: PCO2 & HCO3 A
Approach to Acid-Base ... pH L - Labs: PCO2 ... AcidBase #Acid #Base
Acid Base Disorders Worksheet Step 1: Gather the necessary data (Na+, CI-, HCO3-, PH, pCO2). Preferably, all
Acid Base Disorders ... CI-, HCO3-, PH, pCO2 ... 3: Look at the pCO2 ... . 3a: If pCO2 ... joshsteinbergMD #Acid #Base
Acid-Base Disorders - Differential Diagnosis Algorithm Acidemia (pH < 7.35) • Metabolic Acidosis (HCO3 < 24mmol/L) CO2
Acid-Base Disorders ... Respiratory Acidosis (pCO2 ... Respiratory Alkalosis (pCO2
Acid Base Compensation - Directions - If all three variables (pH, HCO2, pCO2) move in the
Acid Base Compensation ... variables (pH, HCO2, pCO2
Platypnea-Orthodeoxia Syndrome on Physical Exam The case of a patient with a diagnosis of cirrhosis and platypnea-orthodeoxia
Physical Exam The case ... there is a drop in SaO2 ... to 90% (and in paO2
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 Oxygen Saturation - Measurement Techniques and Limitations • Sp02 - Cutaneous pulse oximeter • SaO2 Calculated
pulse oximeter • SaO2 ... ABG device • SaO2 ... pulmonary #diagnosis #comparison
Berlin Criteria for Acute Respiratory Distress Syndrome (ARDS) - Respiratory symptoms must have begun within one
be present on a chest ... inspired oxygen (PaO2 ... - 200 mm Hg < PaO2 ... - 100 mm Hg < PaO2 ... H2O - Severe - PaO2
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