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Question: pulmonary heart disease in patients with chronic respiratory failure, blood gas analysis results: pH7.188, PaCO275mmHg, PaO250mmHg, HCO3-.27.6mmol / L, BE-5mmol / L, the acid-base imbalance typeC. respiratory acidosis metabolic acidosis
D. Metabolic alkalosis
E. respiratory acidosis with metabolic alkalosis
Do not understand, please explain?BE (base excess): [base excess] under standard conditions (blood temperature of 38 , oxygen saturati00%, PaCO2 40mmHg), with acid or base titration of whole blood samples to pH 7.4 when the acid or base used volume. Titration with acid, said base excess (BE), titration with alkali, said base deficit (-BE).
Normal: 0 3 mmol / L
Significance: The indicator reflects the metabolic factors. Positive value indicates the base excess negative value indicates the base deficit.
Acidosis: HCO3-/H2CO3 ratio <20 / 1, PH value decreased or lower than the normal limit of 7.3 Alkalosis: HCO3-/H2CO3 r 20 / 1, PH value is rising or higher than the upper limit of normal 7.4 Simple
Metabolic acidosis: HCO3-down due to plasma acidosis caused.
Metabolic alkalosis: Due to an increase in plasma HCO3-caused by alkalosis.
Respiratory acidosis: an increase in the PH value for H2CO3 down.
Respiratory alkalosis: the PH value decreased due to increased H2CO Medical


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Condition analysis:
Acidosis: Department of Endocrinology, disease, the blood and tissue accumulation of acidic substances, and its essence is increased blood hydrogen ion concentration, PH value decreased.
Suggestion:
Metabolic acidosis is characterized by a plasma [HCO-] primary reduction, pH decreasing.
Respiratory acidosis is characterized by a plasma [H2CO3] concentration, pH decreasing.
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