Final answer:
In the context of significant dehydration for an otherwise healthy patient, the likely findings on a urinalysis and CBC would be increased urine SG and increased PCV, reflecting the body's conservation of water and the concentration of blood components due to reduced hydration.
Step-by-step explanation:
With significant dehydration in an otherwise healthy patient, the changes likely to appear on a urinalysis and Complete Blood Count (CBC) are Increased urine specific gravity (SG) and increased Packed Cell Volume (PCV). Dehydration leads to hemoconcentration due to decreased blood volume, which results in an increase of blood components such as hematocrit, reflected in a higher PCV. Urine specific gravity is a measure of urine concentration, and as the body tries to conserve water, the urine becomes more concentrated, leading to increased urine SG.
Conditions such as vomiting, diarrhea, or any other factors that lead to fluid loss without proper replacement can cause dehydration. When dehydrated, blood urea levels may seem elevated due to reduced blood volume and decreased glomerular filtration rate resulting from low blood pressure. Intracellular dehydration can lead to intracellular edema, impairing urine function and causing uremia in severe cases.