Published: 17 Sep 2024

Influence of External Factors on Blood Test Results

External factors can influence the accuracy of blood test results. For example:

* Sample Handling: Excessive handling or dropping of the sample can cause erythrocyte (red blood cell) breakage, potentially leading to falsely elevated calcium levels.

False Results Due to External Factors

False results can occur due to external factors such as:

* Drugs and Supplements: Birth control pills and estrogen can alter thyroid test results.
* Food and Beverages: Certain foods and beverages can affect test results, such as fasting before a glucose tolerance test.
* Stress: Stress can release hormones that influence blood test results.

Interpretation of Blood Test Results

When reviewing blood test results, it is important to:

* Discuss them with a healthcare professional to ensure accurate interpretation.
* Understand that false results can occur and may require repeat testing.

Complete Blood Count (CBC)

The CBC is a common blood test that provides information about red blood cells, white blood cells, and platelets. It is used to:

* Assess nutritional status
* Screen for diseases (e.g., anemia, leukemia)
* Determine overall health status

Normal Ranges for CBC:

* Hemoglobin (Hgb):
* Men: 13.0 to 17.0 g/dL
* Women: 11.5 to 15.5 g/dL
* Hematocrit (Hct):
* Men: 40 to 55 percent
* Women: 36 to 48 percent
* Platelet count:
* Adults: 150,000 to 400,000/mL
* White blood cell count:
* Adults: 5,000 to 10,000/mL