#春日生活打卡季#
In fact, whether fasting is required for physical examination blood draw is determined according to the examination items.
Tests that require fasting
Liver and kidney function tests require fasting.
Fasting blood glucose test and fasting C-peptide, insulin, generally speaking, blood glucose monitoring is most meaningful fasting blood glucose and two hours after meals, so if you want to test fasting blood sugar, be sure to fast.
Blood lipid test, eating may affect the test results, so the blood lipid test also needs to be fasted.
Electrolyte and hormone levels may also be affected by diet and need to be fasted.
Fasting is also required for tumor markers, four items of hypertension, and bone metabolism markers.
Items that do not require an empty stomach
Fasting is not required because eating has no effect on the test results, such as routine blood tests, infectious diseases, and blood clotting.
In addition, if there are special requirements for the time node, such as a blood test two hours after a meal, then the time of eating the first bite of the meal should be strictly recorded, and the blood draw should be pushed back two hours.
How can I ensure the accuracy of the test?
The requirement of fasting is always misunderstood by patients, and clinical oolongs abound because of this.
The most exaggerated thing is that the doctor said that tomorrow the operation is fasting and not allowed to eat, and as a result, everyone will be pushed to the operating table, and then forced to answer: "I didn't eat, it doesn't matter if I ate a biscuit, I didn't eat." ”
So, when and to what extent should you fast?
1. Fasting time: It is generally recommended not to eat for 8-12 hours before the blood draw to ensure accurate test results.
2. Restriction of water intake: It is best to avoid drinking water before the blood is drawn. For some specific tests (e.g., blood glucose, blood lipids, etc.), drinking water may cause inaccurate results. If you are really thirsty, you can rinse your mouth with water.
3. Try to avoid strenuous exercise before the examination so as not to affect the examination results.
4. Rest in time the night before the examination, do not stay up late, staying up late will also affect the results of the liver function and other examinations.
5. The day before the test, you should pay attention to a light diet, do not eat too greasy food, and do not drink a lot of alcohol. Try not to drink alcohol for three days before the test.
6. In order to prevent hypoglycemia on an empty stomach, you can prepare sugar cubes in advance in case you need them.