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Kaplan Qbank USMLE



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Na+(mEq/L) Cl–(mEq/L) K+(mEq/L) HCO3–(mEq/L)

pH Specific

gravity

A

)

132 89 2.8 39 5.0 1.025

B

)

133 110 3.9 16 6.0 1.015

C

)

163 117 4.3 22 5.5 1.003

D

)

165 115 4.5 19 5.0 1.030

14. An 8-week-old boy is brought to the physician

by his mother

because of persistent vomiting for 2 days. He has

spit up intermittently

since birth. He has had no diarrhea. He appears

irritable. His

temperature is 38 C (100.4 F), blood pressure is 90/60

mm Hg, pulse is

130/min, and respirations are 25/min. Examination

shows a sunken anterior

fontanelle. Mucous membranes are dry. The lungs are

clear to

auscultation. Heart sounds are normal. The abdomen

is scaphoid, and bowel

sounds are active.



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