Final answer:
The fluid mobilization or diuretic phase of a burn typically starts 48 to 72 hours after the initial burn injury and can last for several days. During this phase, diuresis peaks about 1 hour after it begins, which usually occurs 30 minutes after fluid ingestion, and normal urine production is reestablished after about 3 hours. The kidneys and ADH play significant roles in managing fluid levels during this phase.
Step-by-step explanation:
The fluid mobilization or diuretic phase of a burn refers to the time period after the initial burn injury when the retained fluid starts mobilizing and the body begins to return to its normal fluid balance. This phase involves increased urine output as the body excretes the excess fluid accumulated during the resuscitation phase.
In general, diuresis begins approximately 30 minutes after ingesting a large amount of fluid and peaks after about 1 hour. The kidneys play a vital role during this phase, as they adjust to the changing fluid levels and work to normalize urine production. Usually, normal urine production is reestablished after about 3 hours.
However, in the context of burn injuries, the diuretic phase can vary based on the severity of the burns, the patient's overall health, and the effectiveness of the initial resuscitation. It typically starts 48 to 72 hours after injury and can last for several days. The kidneys must work efficiently during this time to balance electrolytes and manage the fluid mobilization. The role of antidiuretic hormone (ADH) is also crucial as it regulates the retention and excretion of water by the kidneys.