Why should you have an empty stomach for blood collection during physical examination, and don t hav

The fasting examination is generally to check liver and kidney function and blood routine; Hepatitis does not need to be fasted for testing, so hepatitis can be detected even if you donate blood without fasting.

There are many contributing factors that can be avoided by taking blood on an empty stomach. The most important thing is that liver function and blood sugar have a great impact. However, the detection of hepatitis indicators, i.e., hepatitis A, B, C, D, and E, has no effect on fasting.

So if you're just going to test for hepatitis virus markers, it doesn't matter if you're on an empty stomach or not. If you want to test liver function and kidney function, you must fast.

Let me tell you about it.

When donating blood for free, blood is mainly drawn to check whether there are some infectious diseases, such as hepatitis and HIV, etc., and eating will not affect the accuracy of the laboratory test, so you can eat.

In addition to the above-mentioned infectious diseases, the usual physical examination also includes blood sugar and liver function tests. After eating, it can cause a significant increase in blood sugar and an increase in transaminases in liver function. So can't eat.

Fasting is a way to check blood sugar.

If you do not test on an empty stomach, it will affect the normal examination results, and you can not confirm the occurrence and development of the disease, so you need to be under the guidance of medical staff, with relevant auxiliary examination items, if it is a simple blood routine or trace elements, you generally do not need to fast, mainly for some blood sugar, blood viscosity or other indicators of liver and kidney function to check these items need to be fasted to test the doctor's advice and guidance.

No, donors should not donate blood on an empty stomach.

If you fasting for a long time, you will have low blood sugar, and if your brain blood sugar ** is insufficient when you take blood, you will often have more serious blood donation reactions, such as sweating, discomfort, and even syncope.

In such a situation, in this case, blood collection will generally be stopped, drink some sugar water, lie down for a while, and soon recover.

Blood donation is a very meaningful thing, and we can often see blood donation vehicles on the side of the road in life, and this is also to encourage everyone to donate blood for free, so do you need to donate blood on an empty stomach? Do I have to be fasting to donate blood? Many people don't know this question, so here is an answer to the question of whether you have to have an empty stomach to donate blood.

1. Blood donation requires fasting

Blood should be drawn on an empty stomach, and the same is true for blood donations.

Truth: No, an empty stomach is dangerous.

Explanation: Blood donation is different from biochemical tests done in hospitals and does not require fasting. Conversely, if you donate blood on an empty stomach, the glucose content in your blood is low.

It is likely to cause dizziness and other adverse blood sugar reactions. In order to ensure that blood donors are in a good physiological state when donating blood, and at the same time avoid the phenomenon of excessive plasma fat content caused by a large amount of supplementation, blood donors can maintain a light diet and adequate sleep the day before blood donation.

2. High cholesterol can donate blood

People with high cholesterol can donate blood.

According to the provisions of the "Blood Donor Health Examination to Wait" (GB18467-2011): patients with circulatory diseases, such as various heart diseases, hypertension, hypotension, atherosclerosis of the limbs, thrombophlebitis, etc. If high cholesterol does not cause diseases such as atherosclerosis, you can donate blood, but you need to explain to your doctor that your cholesterol is high before donating blood.

Even if the blood containing cholesterol is collected, the red blood cells isolated after the test can still be used, and there is no cholesterol in the red blood cells, and the cholesterol is in the plasma.

3. You can't donate blood if you have certain diseases

If the high cholesterol is severe and accompanied by other medical conditions, such as cardiovascular and cerebrovascular diseases, diabetes, or other organic diseases, blood donation is not allowed.