Question 1 · Medium
For a stool sample for occult blood, the patient should avoid for about three days before the test:
- ARice and white bread
- BClear fruit juice
- CPlain drinking water
- DRed meat and aspirin
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Answer: D · Red meat and aspirin
Red meat, some vegetables and drugs such as aspirin and iron can give false results in guaiac occult blood tests. The patient follows the diet advice for the test used. Rice, bread and water do not interfere.
- A: Rice and bread do not affect the test.
- B: Clear juice does not cause false results.
- C: Water does not interfere.