The nurse preparing a patient for an ultrasound of the gallbladder the following morning will:
A) Initiate NPO status after midnight
B) Administer the contrast agent orally 10 to 12 hours before the study
C) Administer the radioactive agent intravenously the evening before the study
D) Encourage the intake of 64 oz of water 8 hours before the study
Ans: A
Feedback: An ultrasound of the gallbladder is most accurate if the patient fasts overnight, so that the gallbladder is distended. Contrast and radioactive agents are not used when performing ultrasonography of the gallbladder, as an ultrasound is based on reflected sound waves.
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