Ace Your First Aid for the USMLE Step 1 2020 Classes and Exams with Picmonic: #1 Visual Mnemonic Study Tool for Medical (MD/DO) Students

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First Aid for the USMLE Step 1 2020 Medical (MD/DO) School Study Aid


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Alveolar Gas Equation
Equation
Partial Pressure of Alveolar Oxygen (PAO2)
Partial Pressure of Oxygen in the Inspired Air (PIO2)
PIO2 Normally Approximated = 150 mmHg
Arterial Partial Pressure of CO2 (PaCO2)
Respiratory Quotient (R)
R Normally Approximated = 0.8
PAO2 = PIO2 - (PaCO2/R)
1 min
A-a Gradient
Partial pressure of alveolar oxygen (PAO2)
Partial Pressure of Arterial O2 (PaO2)
Normal 10 to 15 mmHg
Hypoxemia with an Abnormal A-a Gradient
Diffusion problem
Shunting (Low V/Q)
Dead space (high V/Q)
1 min

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