Question

structural abnormalities of the esophagus can be diagnosed by the following test: a lower gi series. b barium swallow. c barium enema. d colonoscopy. e nasogastric intubation.

Explanation:

To diagnose structural abnormalities of the esophagus, we analyze each option:

• Option A (lower GI series) focuses on the lower gastrointestinal tract (like colon, rectum), not the esophagus.
• Option B (barium swallow) involves swallowing a barium - containing liquid, which coats the esophagus. X - rays are then taken to visualize the esophagus's structure, making it suitable for diagnosing esophageal structural issues.
• Option C (barium enema) is used for examining the colon and rectum (lower GI) by introducing barium into the rectum, so it's not for the esophagus.
• Option D (colonoscopy) is a procedure to examine the colon and rectum, not the esophagus.
• Option E (nasogastric intubation) is mainly for administering nutrients/medications or removing gastric contents, not for diagnosing esophageal structure.

Answer:

B. barium swallow.