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If the body experiences one of these derangements, the body will try to compensate by inducing an opposite process (e.g. induced respiratory alkalosis for a primary metabolic acidosis). [ 7 ] Respiratory compensation is one of three major processes the body uses to react to derangements in acid-base status (above or below pH 7.4).
The amount of respiratory compensation in metabolic acidosis can be estimated using Winters' formula. [2] Hyperventilation due to the compensation for metabolic acidosis persists for 24 to 48 hours after correction of the acidosis, and can lead to respiratory alkalosis. [3] This compensation process can occur within minutes. [4]
Metabolic alkalosis is an acid-base disorder in which the pH of tissue is elevated beyond the normal range (7.35–7.45). This is the result of decreased hydrogen ion concentration, leading to increased bicarbonate ( HCO − 3 ), or alternatively a direct result of increased bicarbonate concentrations.
metabolic acidosis, or respiratory alkalosis with renal compensation if too low (less than −2 mEq/L) Blood pH is determined by both a metabolic component, measured by base excess, and a respiratory component, measured by PaCO 2 (partial pressure of carbon dioxide). Often a disturbance in one triggers a partial compensation in the other.
Respiratory alkalosis is very rarely life-threatening, though pH level should not be 7.5 or greater. The aim in treatment is to detect the underlying cause. When PaCO2 is adjusted rapidly in individuals with chronic respiratory alkalosis, metabolic acidosis may occur. [3]
Compensatory mechanism for metabolic alkalosis involve slowed breathing by the lungs to increase serum carbon dioxide, [2] a condition leaning toward respiratory acidosis. As respiratory acidosis often accompanies the compensation for metabolic alkalosis, and vice versa, a delicate balance is created between these two conditions.
It can also occur as a compensatory response to chronic metabolic alkalosis. [citation needed] One key to distinguish between respiratory and metabolic acidosis is that in respiratory acidosis, the CO 2 is increased while the bicarbonate is either normal (uncompensated) or increased (compensated). Compensation occurs if respiratory acidosis is ...
The base excess is used for the assessment of the metabolic component of acid-base disorders, and indicates whether the person has metabolic acidosis or metabolic alkalosis. Contrasted with the bicarbonate levels, the base excess is a calculated value intended to completely isolate the non-respiratory portion of the pH change. [16]