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Questions and Answers
Which of the following indicates partially compensated respiratory alkalosis?
Which of the following indicates partially compensated respiratory alkalosis?
- PH ↓ PaCo2 ↓ HCO3 ↓
- PH ↑ PaCo2 ↑ HCO3 ↑ (correct)
- PH ↑ PaCo2 ↓ HCO3 ↓
- PH ↓ PaCo2 ↑ HCO3 ↑
In compensated respiratory alkalosis, what is the status of PaCo2 and HCO3?
In compensated respiratory alkalosis, what is the status of PaCo2 and HCO3?
- PaCo2 abnormal, HCO3 normal
- PaCo2 normal, HCO3 abnormal (correct)
- Both abnormal
- Both normal
What are the ABG interpretations for PH: 7.50, PaCO2: 31, HCO3: 25?
What are the ABG interpretations for PH: 7.50, PaCO2: 31, HCO3: 25?
- PH: Normal, PaCo2: Abnormal (Respiratory alkalosis), HCO3: Abnormal (Metabolic acidosis)
- PH: Abnormal (Alkalosis), PaCo2: Normal, HCO3: Abnormal (Metabolic acidosis)
- PH: Abnormal (Alkalosis), PaCo2: Abnormal (Respiratory alkalosis), HCO3: Normal (correct)
- PH: Abnormal (Alkalosis), PaCo2: Abnormal (Respiratory alkalosis), HCO3: Abnormal (Metabolic acidosis)
What does a PH of 7.47, PaCO2 of 33, and HCO3 of 20 indicate?
What does a PH of 7.47, PaCO2 of 33, and HCO3 of 20 indicate?
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What does a combination of respiratory and metabolic alkalosis indicate in ABG interpretation?
What does a combination of respiratory and metabolic alkalosis indicate in ABG interpretation?
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Study Notes
ABG Interpretation Elements
- ABG Interpretation consists of four essential elements: pH, PaCO2, HCO3, and PaO2
- Normal ranges for each element:
- pH: 7.35-7.45
- PaCO2: 35-45 mmHg
- HCO3: 22-26 mEq/L
- PaO2: 80-100 mmHg
- Sao2: 95-99%
Interpretation of ABG Results
- Increased pH value:
- Indicates alkalemia or alkalosis
- Can be due to respiratory acidosis or metabolic alkalosis
- Decreased pH value:
- Indicates acidemia or acidosis
- Can be due to respiratory alkalosis or metabolic acidosis
Oxygen Therapy and Hypoxemia
- Oxygen therapy is indicated for hypoxemic patients
- Degree of hypoxemia:
- Mild: PaO2 < 80 mmHg
- Moderate: PaO2 < 70 mmHg
- Severe: PaO2 < 60 mmHg
Case Study Example
- Given values: pH 7.41, PaCO2 30, HCO3 18
- Interpretation:
- pH: Normal
- PaCO2: Abnormal (indicating respiratory alkalosis)
- HCO3: Abnormal (indicating metabolic acidosis)
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