Final answer:
A BUN level of 22 mg/dl in a 7-year-old child can indicate dehydration, renal failure, and proteinuria.
Step-by-step explanation:
A BUN (blood urea nitrogen) level of 22 mg/dl in a 7-year-old child can indicate several things. Select all that apply from the given options.
a. Dehydration: Dehydration can cause hemoconcentration, leading to an increase in blood urea levels.
b. Renal failure: Renal failure may also result in elevated BUN levels.
c. Proteinuria: Proteinuria, which is the presence of protein in the urine, can be a sign of kidney disorders.
d. Overhydration: Overhydration is not typically associated with an elevated BUN level.