RESPIRATORY
CHRONIC OBSTRUCTIVE PULMONARY DISEASE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Metabolic acidosis, uncompensated
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Respiratory alkalosis, uncompensated
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Respiratory acidosis, uncompensated
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Metabolic acidosis, partially compensated
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Detailed explanation-1: -If pH is normal but closer to the acidotic end, and both PaCO2 and HCO3 are elevated, the kidneys have compensated for a respiratory problem. If the pH is normal, but closer to the alkalotic end of the normal range, and both PaCO2 and HCO3 are elevated, the lungs have compensated for a metabolic problem (see Table 3).
Detailed explanation-2: -Normal arterial blood gas values include pH 7.35 to 7.45, pCO2 35 to 45, HCO3-22 to 26.
Detailed explanation-3: -The normal range of pCO2 is 35 – 45 mmHg (with some variation for chronic CO2 retainers-think COPD). The HCO3 (bicarb) on an ABG is a calculated value. Therefore, the reported serum bicarb value should be factored In to the interpretation. That being said, a normal range for HCO3 is 22-26 mEq/L.
Detailed explanation-4: -When reviewing ABGs, respiratory alkalosis is identified when pH levels are above 7.45 and the PaCO2 level is below 35. With respiratory alkalosis, notice that as the PaCO2 level decreases, the pH level increases.