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12 Cards in this Set
- Front
- Back
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What is the normal pH range?
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7.35 to 7.45
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What is the formula for calculating the A-a gradient? What is its significance?
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150 - (PaO2 + PaCO x 1.25)
A wide A-a gradient ie >15 indicates lung disease |
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What is the A-a gradient measuring?
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The difference between O2 concentration in the alveoli and arteries
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If the pH is acidic and PaCO2 is high, what is the disorder?
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Primary respiratory
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What PaO2 is indicative of hypoxaemia?
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80mmHg
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What is compensated metabolic acidosis indicative of?
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Sepsis
Lactic Acidosis from pneumonia Diabetic acidosis |
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What is UNcompensated metabolic alkalosis indicative of?
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Vomittin
Diuretic therapy |
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Why is metablic alkalosis rarely compensated?
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Because an increase in CO2 is rarely tolerated
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What is Respiratory alkalosis indicative of?
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Hyperventilation
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Why is Respiratory alkalosis rarely compensated?
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Doesn't go on long enough for kidneys to compensate
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How can there be combined respiratory and metabolic acidosis?
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Shock combined with lung disease
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How can Hyperventilation or a lack of steady state skew the results?
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In acute hyperventilation PaCO2 will be reduced
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