Can time of day affect blood test results?

Blood tests have certain requirements and precautions for patients to get more accurate results: Blood tests should be performed in the morning. For tests that measure blood sugar, blood fats, liver and kidney function tests, patients need to fast for 8-12 hours before to get the most accurate results.

vinmec.com - Health check: Should blood tests be done in the afternoon? | Vinmec

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This is an automatically translated article.

Whether the blood test results are accurate or not depends on many factors and requires the person being tested to comply with the regulations of the test. In particular, blood testing in the afternoon or morning is also very important.

1. Can I do a blood test in the afternoon?

Normally, in the morning, the body is relatively stable, all internal organs have not eliminated waste products and the blood does not contain many impurities. On the other hand, our body in the afternoon will go through a series of activities and activities in the morning. Furthermore, the blood test usually requires fasting for a period of 8 to 12 hours beforehand. Thus, the patient cannot fast all morning through noon to do the test in the afternoon. Therefore, for the most accurate results, it is best to perform the blood test in the morning rather than in the afternoon. However, with some tests that don't require pre-fasting, patients can have a normal afternoon test.

2. What should not be done before a blood test?

2.1. Do not eat before a blood test Most tests give accurate results only if the operator has not eaten anything for 8-12 hours before taking the sample. Usually to meet this requirement, they are told to fast after waking up and not to eat late the night before. Because after eating, nutrients will be converted into glucose, leading to increased blood sugar, affecting blood test results. However, in reality, not all blood tests force the patient to fast. For diseases that require blood sugar measurement, it is best for patients to fast before taking blood, such as diabetes, cardiovascular disease, and need to check cholesterol levels, HDL levels in the blood and some diseases. other. As for some diseases where blood tests are used to analyze other indicators such as HIV disease, hyperthyroidism, dementia in the elderly, etc., it is not necessary for the patient to fast. 2.2. Limiting the use of stimulants Although patients should not eat before the blood test, it is not recommended to fast. On the other hand, it is best to avoid using stimulant drinks, such as alcohol, beer, tea, coffee. Stimulant-containing agents should also not be used, such as tobacco, pipe tobacco. This will help diagnose the disease more accurately. 2.3. Avoid taking certain medications Taking certain medications before a blood test will affect the results, especially drugs that affect the concentration of substances in the blood. So, if you are being treated for a certain disease, the patient needs to inform the doctor about this and should bring a prescription to use for the doctor to consider further.

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3. Notes when performing a blood test

Blood tests have certain requirements and precautions for patients to get more accurate results: Blood tests should be performed in the morning. For tests that measure blood sugar, blood fats, liver and kidney function tests, patients need to fast for 8-12 hours before to get the most accurate results. Do not drink soft drinks, milk, juice and avoid stimulants such as alcohol, beer, caffeine for 12 hours before the blood test. Keep psychological comfort, avoid stress, stress, do not stay up at night. Follow the instructions of the medical staff, completely and accurately fill in your information. Should choose to conduct testing at medical facilities and hospitals with high expertise, modern equipment.

4. General health check-up packages at Vinmec

As the leading healthcare address in Vietnam, Vinmec International General Hospital always deploys General Health Checkup Packages suitable for each age, gender and individual needs of customers with policy reasonable price. The difference that the general health check-up packages at Vinmec bring is the ability to screen and apply advanced medical technology to promptly detect diseases that are increasing in popularity and are considered the most common causes. The leading causes of death in Vietnam today, such as: stroke, cancer, respiratory disease, diabetes, especially common diseases such as hypertension, dyslipidemia... In addition, Vinmec owns a system of modern equipment and optimal facilities, helping to best support diagnosis for customers such as PET/CT, MRI, CT 640, international standard laboratory system. In fact, the most advanced ultrasound machine system in the world,... Patient's examination results will be returned to their home. After receiving the results of the general health examination, if you detect diseases that require intensive examination and treatment, you can use services from other specialties at the Hospital with quality treatment and services. outstanding customer service. Please dial for more information or register for an appointment HERE. Download MyVinmec app to make appointments faster and to manage your bookings easily.

vinmec.com - Health check: Should blood tests be done in the afternoon? | Vinmec

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