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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.
As kidney function declines, the tubules lose the ability to excrete excess acid, and this results in buffering of acid using serum bicarbonate, as well as bone and muscle stores. [12] There are many causes of acute metabolic acidosis, and thus it is helpful to group them by the presence or absence of a normal anion gap. [13] Increased anion gap
Accordingly, measurement of base excess is defined, under a standardized pressure of carbon dioxide, by titrating back to a standardized blood pH of 7.40. The predominant base contributing to base excess is bicarbonate. Thus, a deviation of serum bicarbonate from the reference range is ordinarily mirrored by a deviation in base excess.
A high anion gap indicates increased concentrations of unmeasured anions by proxy. Elevated concentrations of unmeasured anions like lactate, beta-hydroxybutyrate, acetoacetate, PO 3− 4, and SO 2− 4, which rise with disease or intoxication, cause loss of HCO − 3 due to bicarbonate's activity as a buffer (without a concurrent increase in ...
In chronic respiratory acidosis, the PaCO 2 is elevated above the upper limit of the reference range, with a normal blood pH (7.35 to 7.45) or near-normal pH secondary to renal compensation and an elevated serum bicarbonate (HCO 3 − >30 mEq/L). [citation needed]
High anion gap metabolic acidosis is a form of metabolic acidosis characterized by a high anion gap (a medical value based on the concentrations of ions in a patient's serum). Metabolic acidosis occurs when the body produces too much acid , or when the kidneys are not removing enough acid from the body.
Outside the United States, blood tests made up of the majority of the same biochemical tests are called urea and electrolytes (U&E or "U and Es"), or urea, electrolytes, creatinine (UEC or EUC or CUE), and are often referred to as 'kidney function tests' as they also include a calculated estimated glomerular filtration rate. The BMP provides ...
Bicarbonate concentration is also further regulated by renal compensation, the process by which the kidneys regulate the concentration of bicarbonate ions by secreting H + ions into the urine while, at the same time, reabsorbing HCO − 3 ions into the blood plasma, or vice versa, depending on whether the plasma pH is falling or rising ...