Final answer:
In the shock phase of a burn, patients typically experience metabolic acidosis due to lactic acid build-up from tissue hypoperfusion and fluid and electrolyte losses.
Step-by-step explanation:
The acid-base disorder seen in the shock phase of a burn is typically metabolic acidosis. This results from increased production of lactic acid due to tissue hypoperfusion and a decrease in the level or function of buffering agents. With severe burns, significant fluid and electrolyte losses occur, leading to hypovolemia, which can further exacerbate metabolic acidosis. Treatment generally involves intravenous fluids to address hypovolemia and correct electrolyte imbalances, along with the monitoring of acid-base status and the administration of bicarbonate if necessary to correct severe acidosis. It's important to manage acidosis properly as it can have deleterious effects on various body systems, including depressing myocardial function and reducing the efficacy of hemoglobin to transport oxygen.