HESI Med Surg Hematological system
HESI Med Surg Hematological system ( 54 Questions)
Metabolic acidosis is characterized by a low pH (<7.35) and a low bicarbonate level (<22 mEq/L) The given arterial blood gas (ABG) values indicate a pH of 7.48 (which is alkalotic), a PaCO2 of 38 (within the normal range of 35-45 mm Hg), and an HCO3- of 30 (which is elevated) These values indicate metabolic alkalosis, not metabolic acidosis.
Metabolic alkalosis is characterized by a high pH (>7.45) and an elevated bicarbonate level (>26 mEq/L) The given ABG values indicate a pH of 7.48 (which is alkalotic) and an elevated HCO3- of 30, indicating metabolic alkalosis. This condition can result from excessive loss of acids (e.g., vomiting) or excessive intake of bicarbonate or alkali substances.
Respiratory acidosis is characterized by a low pH (<7.35) and a high PaCO2 (>45 mm Hg) The given ABG values indicate a normal pH of 7.48 and a PaCO2 of 38 (within the normal range), ruling out respiratory acidosis.
Respiratory alkalosis is characterized by a high pH (>7.45) and a low PaCO2 (<35 mm Hg) The given ABG values indicate a pH of 7.48 (which is alkalotic) and a PaCO2 of 38 (within the normal range), ruling out respiratory alkalosis.
Choice A rationale:
Metabolic acidosis is characterized by a low pH (<7.35) and a low bicarbonate level (<22 mEq/L) The given arterial blood gas (ABG) values indicate a pH of 7.48 (which is alkalotic), a PaCO2 of 38 (within the normal range of 35-45 mm Hg), and an HCO3- of 30 (which is elevated) These values indicate metabolic alkalosis, not metabolic acidosis.
Choice B rationale:
Metabolic alkalosis is characterized by a high pH (>7.45) and an elevated bicarbonate level (>26 mEq/L) The given ABG values indicate a pH of 7.48 (which is alkalotic) and an elevated HCO3- of 30, indicating metabolic alkalosis. This condition can result from excessive loss of acids (e.g., vomiting) or excessive intake of bicarbonate or alkali substances.
Choice C rationale:
Respiratory acidosis is characterized by a low pH (<7.35) and a high PaCO2 (>45 mm Hg) The given ABG values indicate a normal pH of 7.48 and a PaCO2 of 38 (within the normal range), ruling out respiratory acidosis.
Choice D rationale:
Respiratory alkalosis is characterized by a high pH (>7.45) and a low PaCO2 (<35 mm Hg) The given ABG values indicate a pH of 7.48 (which is alkalotic) and a PaCO2 of 38 (within the normal range), ruling out respiratory alkalosis.