A pt with history of taking gentamicin (Garamycin) is admitted with oliguria, confusion, lethargy, nausea and vomitinG. Lab data are as follows
BUN 26
Cr A.6
Na 130
K D.9
Calcium G.8
Which of the following should the nurse suspect
A. dehydration
B. acute tubular necrosis
C. GI infection
D. chronic renal failure