How to donate blood for sugar? Blood sugar What does a blood test show
Blood sugar concentration is an important indicator of human health. The body itself regulates the level of glucose using insulin, which is secreted by the pancreas. If a person often changes the sugar content in the blood, then this can lead to diseases and metabolic disorders.
By the way, an increased or decreased indicator may indicate the occurrence of pathological processes in the body (for example, injuries, stress, infections, and especially hormonal disorders). That is why it is important to control the level of glucose, but not everyone knows how to donate blood for sugar and what should be the preparation for this test.
Causes and symptoms of increased blood sugar
Not always deviation from the norm is hazardous to health.Elevated blood sugar is not always considered a pathology and is almost asymptomatic if such leaps are temporary.
However, a regular or chronic increase in the level of glucose entails a whole range of serious complications: impaired renal function, neurological damage to the retina, cardiovascular disorders, changes in metabolic processes. If blood sugar rises, the reasons for this may be very different. Glucose circulates in the human body and serves as the main source of energy. Digestion and breakdown of carbohydrate-containing products in its simplest form produces glucose, therefore, its level in the body increases after eating them. Some drugs, diseases, lack of exercise, and so on can also affect the increase in blood sugar levels.
Signs that may indicate elevated sugar include the following:
- frequent hunger, gluttony;
- frequent bouts of thirst;
- polyuria (increase in urine volume);
- deterioration of visual acuity;
- increased fatigue, drowsiness;
- sharp weight loss;
- poor wound healing;
- feeling of dry mouth;
- itching of the skin;
- erectile disfunction;
- cardiac arrhythmia;
- convulsions, coma.
Blood Sugar Rate
The level of glucose, as a rule, in the morning (before the first meal) is lowered and is called post-level. The normal indicator can vary from 4.4 to 6.0 mmol / l, and 5.5 mmol / l is considered to be the average. During the day, this value may vary slightly, but generally remains within the normal range. To determine this amount, a person needs to take a blood test on an empty stomach.
After eating for an hour, this figure rises by a few millimoles. Indicators outside the normal range can be an indicator of human health. Maintaining a high level is called hyperglycemia, low - hypoglycemia. Persistent hyperglycemia indicates the development of diabetes.
How to test for sugar
A clinical blood test is needed to control glucose levels. But how to donate blood for sugar, they know not all. There are two types of tests to measure this indicator: using a blood glucose meter and a blood test from a finger or vein.The advantage of the first method is its accessibility at home (you need to purchase a device and regularly monitor your performance). The second is carried out in the laboratory and is considered more accurate and reliable.
However, before donating blood for sugar, you should know some rules:
- before the analysis does not need to adhere to any special diet;
- analysis pass on an empty stomach, on the eve should not overeat;
- The results may be inaccurate if the person is sick (cold, indisposition);
- The state of pregnancy can cause strong deviations of results from the norm.
The results obtained with the help of a glucometer at home make it possible to understand what the blood test shows, and also allow you to observe how various foods, physical activity or the presence of diabetes affect the sugar level. This method is especially important for diabetics who can control and manage the disease daily.
For the second method, it is necessary to take blood samples from a vein and conduct laboratory analysis of the sample for blood sugar. If the rate is high,then, in order to exclude latent diabetes, a person will need to pass additional tests - an oral glucose tolerance test and the determination of glycosylated hemoglobin in the blood. The essence of the first test is to measure the concentration of sugar on an empty stomach. Then the person takes the glucose solution and the test is repeated after an hour, a half and two hours. The second test allows you to determine if there has been an increase in human blood sugar over the past 3 months.
What raises blood sugar
Often, to reduce the level of glucose in the blood, people resort to certain products, which in fact only exacerbate the pathological process. These foods include artificial sweeteners. Studies show that substances such as saccharin, aspartame, sucralose and others that are part of sugar substitutes can alter the microflora in the human intestine and provoke undesirable changes in the body, such as an increase in glucose and the risk of developing diabetes. Therefore, before donating blood for sugar, and indeed, to preserve health, one should abandon such products.
What lowers blood sugar
An excessive decrease in the concentration of glucose in the blood is also a pathological phenomenon and entails negative consequences for the body. The following factors contribute to its reduction:
- poor nutrition, prolonged malnutrition, hunger strike;
- alcohol poisoning;
- diseases of the digestive system;
- metabolic disorders;
- intoxication of the body;
- An overdose of insulin in diabetes and so on.