11-28-2007, 03:13 PM
A 5-year-old boy is brought to the emergency department 30 minutes
after he fainted at home after standing up from a sitting position.
His symptoms began 3 days ago with diarrhea and vomiting. He has had
no urine output for 18 hours. He is alert but quiet. His temperature
is 37.5 C (99.5 F), blood pressure is 75/45 mm Hg, pulse is 120/min,
and respirations are 28/min. Examination shows dry lips and tenting of
the skin. There is no abdominal tenderness. Bowel sounds are
hyperactive. The remainder of the examination shows no abnormalities.
His capillary refill time is 5 seconds. Intravenous bolus doses of
0.9% saline are administered. Bladder catheterization yields 5 mL of
urine. Urinalysis is most likely to show which of the following?
A
) Blood
B
) Erythrocyte casts
C
) Hyaline casts
D
) Leukocyte casts
E
) Oxalate crystals
after he fainted at home after standing up from a sitting position.
His symptoms began 3 days ago with diarrhea and vomiting. He has had
no urine output for 18 hours. He is alert but quiet. His temperature
is 37.5 C (99.5 F), blood pressure is 75/45 mm Hg, pulse is 120/min,
and respirations are 28/min. Examination shows dry lips and tenting of
the skin. There is no abdominal tenderness. Bowel sounds are
hyperactive. The remainder of the examination shows no abnormalities.
His capillary refill time is 5 seconds. Intravenous bolus doses of
0.9% saline are administered. Bladder catheterization yields 5 mL of
urine. Urinalysis is most likely to show which of the following?
A
) Blood
B
) Erythrocyte casts
C
) Hyaline casts
D
) Leukocyte casts
E
) Oxalate crystals