Can I drink water when measuring fasting blood sugar?

In outpatient clinics, we often meet diabetic patients who arrive in a hurry near noon and say, "Doctor, please check my fasting blood sugar. I haven't eaten or drank." In this way, even if you check, it won't be considered true fasting. blood sugar. Why is this?

The best fasting required for medical examination is 12-14 hours. One thing to note here is that fasting for fasting blood test means not eating food, but you can drink water. In addition, if you have high blood pressure and other diseases, you can also take antihypertensive drugs.

If the fasting time exceeds 14 hours, the body's physiological and metabolic activities will often change due to excessive hunger. Blood sugar is the body's main source of energy. Just like a car needs gasoline, the body cannot move without blood sugar. To maintain the body's blood sugar at a stable level, one is to rely on our three meals a day, and the other is that when we do not eat for a long time, in order to prevent the occurrence of hypoglycemia, the liver will release the sugar stored in the liver into the blood, causing The sugar level in the blood has increased to a certain extent, so the blood sugar level at this time is not a true fasting blood sugar. Therefore, it is best to measure fasting blood sugar in the morning as soon as the doctor comes to work, and do not stay hungry for too long.

If it is a 2-hour post-meal blood glucose test, the 2-hour period starts with the first bite of the meal and the blood is drawn after 2 hours. Many patients often think that they start looking at the watch after eating. The post-meal blood sugar will gradually decrease as time goes by. Therefore, if the time calculation is wrong, the real post-meal blood sugar result will not be obtained.

Second question: In addition to fasting and postprandial blood sugar, what else should be measured?

Some diabetic patients come to the hospital on time, just to prescribe and take medicine, and do not monitor their blood sugar regularly; there are also many patients who also measure their blood sugar, but only monitor their fasting blood sugar, thinking that once their fasting blood sugar is controlled, they will be fine. These practices are obviously incorrect.

Everyone's blood sugar level is not static throughout the day. It is like a wave, with ups and downs, highs and lows. Generally, blood sugar levels are relatively low on an empty stomach, before meals, and before going to bed, while blood sugar levels are relatively high after three meals. Therefore, to understand the situation of blood sugar, you should understand "all-day" blood sugar and monitor blood sugar at different times.

In addition, diabetic patients should also check an "average blood sugar", which can tell you the blood sugar control situation in the past 2-3 months, and this "average blood sugar" is also very convenient to check, and blood can be drawn at any time, regardless of time or time. Not affected by eating. This "average blood sugar" is also called "glycated hemoglobin" by doctors. If financial conditions permit, diabetic patients can check it every 3 months.

Question 3: Do I need special treatment before testing blood sugar?

Many patients often have this idea. If they have to check their blood sugar the next day, they especially hope that the test results will be normal. Therefore, they pay great attention to their meals and control them strictly. They try to eat as little as possible or even not at all. Or they know that exercise can lower blood sugar, so they usually do not eat at all. Exercise, it's time to test your blood sugar, so do some exercise. Some patients eat extravagantly to see how high their blood sugar can reach.

These practices are actually similar to "cheating". In a sense, this blood can be regarded as wasted and useless.

Therefore, it is recommended that diabetic patients should eat and move as usual before drawing blood, and follow the routine before drawing blood for examination, and do not "cheat". Only in this way can the real you be reflected, and only in this way can you prevent your blood from flowing in vain and get the real blood sugar results, detect the situation in time, and make timely adjustments.

Question 4: Do I need to stop taking medication before going to the hospital for a blood sugar test?

This "hidden rule" is mentioned separately, which shows that it is very important. Because many diabetic patients will deliberately stop taking their usual anti-diabetic drugs or insulin when checking their blood sugar, especially after a meal. It would be a grave mistake to do so.

When checking blood sugar, you must continue to take medication according to the usual medication method to understand the "real" blood sugar control situation under medication, so that you can determine whether the current hypoglycemic drugs or insulin need to be adjusted based on blood sugar.