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Why blood test ?

Many diseases cannot be diagnosed and identified immediately. There are some operation tests needed, for example, blood test and urinalysis. Then the doctor will use both results to diagnose and plan the medical treatment. They also will be used in annual health check.

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There are some frequently asked questions why you have to test blood and urine as well as how to prepare yourself before getting the tests. Let’s start with blood test;

– How to prepare yourself before testing blood? You should get enough sleep at least 6-8 hours. Do not exercise too much and do not drink any alcohol beverage. Some medicines are not allowed to take. You can have your meals normally. Except, you are getting blood sugar and cholesterol test. You must have fasting at least 8-12 hours before testing blood. Only drinking water is allowed.

– How many cc of blood will be taken for the test? Total blood volume in human body is about 5,000 cc. The amount of blood will be used only 8-10 cc, approximately 0.2% of your total blood.

– How long does it take to know the result? For Complete Blood Count (CBC), Blood Urea Nitrogen (BUN), Creatinine (Cr), Serum Glutamic-Oxaloacetic Transaminase (SGOT), Serum Glutamate Pyruvate Transaminase (SGPT), Liver Function Test, Fasting Blood Sugar (FBS), Cholesterol and etc., the test will take about 1-3 hours to get the result. For Blood Culture or some special result will take about a day.


Urinalysis can also tell your health situation, not only blood test. For example, Renal Stone, Renal Failure and etc. The best time for testing or getting the urine for the test is in the morning after you wake up because the urine will have high intensity with many sediments. The right process should be letting the urine go for few seconds to reduce cell contamination from Urethra. Women are having a period should not test the urine because erythrocyte or red blood cell may come out with the urine which causes the incorrect diagnosis.

Here are only some reasons of blood and urine testing.When you know about your health, not only the doctor can help you plan the medical treatment in time but also you can live your life healthily away from any disease. You see how they are important. Let’s have the tests! See you next issue.

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