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Which exams require a restriction of the patient's diet?

  1. UGI only

  2. UGI and abdominal survey

  3. UGI and IVP

  4. Abdominal survey and IVP

The correct answer is: UGI and abdominal survey

The correct answer indicates that both an upper gastrointestinal (UGI) series and an abdominal survey require a restriction of the patient's diet. For the UGI series, patients are typically instructed to fast for several hours before the exam, usually overnight, to ensure that the stomach is empty. This fasting helps improve the quality of the images obtained during the procedure, allowing for better visualization of the structures being evaluated. Similarly, an abdominal survey may require dietary restrictions to reduce the presence of food and gas in the gastrointestinal tract, which can obscure the images and potentially lead to misinterpretation of the results. By ensuring that the patient has followed dietary restrictions, the clarity and diagnostic utility of the imaging studies can be enhanced. The other options either list exams that do not typically require dietary restrictions or omit one of the relevant exams. For instance, while intravenous pyelography (IVP) may involve some preparatory instructions regarding hydration and possible dietary modifications, it is not as strict as the preparations required for the UGI or abdominal surveys.