If you're collecting a sample for a patient for laboratory testing, make sure to consider some factors that may possibly alter his/her results. Depending on the procedure requested, these factors may include:
- Incorrect pretest diet
- Current drug therapy
- Type of illness
- Dehydration
- Position or activity at time of specimen collection
- Postprandial status (ie, time patient last ate)
- Time of day
- Pregnancy
- Level of patient knowledge and understanding of testing process
- Stress
- Nonadherence or noncompliance with instructions and pretest preparation
- Undisclosed drug or alcohol use
- Age and gender
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