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What Is a Blood Test?


A blood test is a kind of a laboratory test that comprises various other evaluations done on a sample of blood. This sample of blood is collected from the veins of the patient to analyze and verify the symptoms shown by him or her for a particular medical condition.

When Is a Blood Test Recommended?

A blood test is recommended when there is a certain disease, infection, or abnormality experienced by the patient.
However, the reasons to recommend a blood test are not restricted to this. The other reasons can be:
- General assessment of the health of the person.
- To confirm the effective functioning of internal organs like the liver and kidneys.
- Testing the status for some genetic conditions

Preparing for a Blood Test

Conducting a blood test is not a lengthy procedure and can be completed within a few minutes. There can be certain instructions depending on the type of the blood test that need to be followed before the blood sample is collected. The healthcare professional may instruct for the following:
- A fasting duration of 12 hours
- No intake of certain medication

If instructed for any of these, it should be followed as they may affect the result of the blood test and the reading may not be accurate.

Understanding the Blood Test Results
Once the blood sample is collected, it is sent to the labs to be checked depending on the requirements.
These results are sent back to the hospital or the doctor who would explain the results and advise the corresponding medication or care to be taken based on the results of the test.
For instance, a high level of cholesterol can indicate serious health problems; the doctor is likely to advise medications to avoid problems like heart attack or strokes.

Likewise, for sensitive tests like the HIV that can be unnerving for the patient to deal with, a counselling session may be held to describe the result of such tests.

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