Often, adults need to be screened in clinics, a blood test is part of the process. When assessing the blood composition, the doctor can confirm the preliminary diagnosis or change it. Can I smoke before giving a blood test? How big is the influence of nicotine?
- Influence of cigarettes
- General requirements
- Biochemical analysis
- Analysis for sugar
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Influence of cigarettes
Each specialist is aware of the situation with tobacco - smoking is prohibited before blood collection. Can I smoke before giving blood on an empty stomach? When smoking on an empty stomach, the results of the analysis will be distorted. The smoker has elevated levels of catecholamines and cortisol in the serum.
How does the involvement of these hormones affect the analysis? Often this leads to a decrease in eosinophils and an increase in monocytes in the blood. Harmful dependence increases the number of erythrocytes and lowers the level of leukocytes.
General requirements
Before donating blood from the vein or from the finger, the rules are as follows:
- Blood is taken away on an empty stomach, food is forbidden for 8-10 hours, it is allowed to drink purified water.
- Do not stress yourself with sports, it is recommended to avoid stress.
- It is forbidden to drink alcohol, including beer.
- It is forbidden to smoke before the analysis.
If the analysis is not scheduled for the morning, it is not worthwhile for a long time to limit yourself to eating. In this case, you can easily have breakfast 3 hours before the procedure.
Important! The ban on smoking acts like a normal analysis, conducted in the morning.
When donating blood for donation, you should stop smoking within a few hours. About the use of tea and coffee, in preparation for delivery they must be deleted. With this, according to most of the doctors surveyed, even if the drinks are consumed without sugar, they activate the same processes in the body as food intake. When indicating the delivery of blood on an empty stomach, tea and coffee must be excluded.
Before conducting an HIV test, the recommendations do not differ from the general blood test. 8 hours before the test do not eat, do not smoke and do not drink alcohol.
Unloading the body 24 hours before the test is given. You should give up fatty or heavy food. Remove sweets if you have a habit of drinking coffee with sugar.
Before donating blood from the vein, stop smoking the day before the procedure. Experts assure that these components will have a detrimental effect on the result of the tests. Before donating blood, you need to rest for a couple of minutes, because physical stress also affects the whole list of indicators.
How much can I start eating? After the procedure, you can have a snack, do not smoke for 2 hours. Especially, when collecting blood from a vein in considerable quantities. Snack, you can dilute the snack with a cup of tea or coffee with sugar, it helps to restore strength.
Biochemical analysis
The results directly depend on the preparation for them. Before analyzing biochemistry, you need to refrain from sports and emotional upheavals. During the day, alcohol and especially tobacco are banned. You can not suck lollipops, chew gum. An analysis is given after 12 hours of fasting - this is the main requirement. Dinner the day before it will have no later than 18:00. If there is an urgent need to take an analysis, the fasting time is reduced to 4 hours.
Analysis for sugar
Features of the analysis:
- When you pass a blood test for sugar, you need an 8-hour break in taking food, only drinking water is allowed from drinking. Alcohol and sweet water are forbidden.
- Before taking the test for the content of sugar, smoking is strictly prohibited.
- In the morning, you can not brush your teeth with sugar-containing paste.
- Be careful with taking medications. If there are exacerbations of chronic diseases, report the problem to the doctor.
- The results of the analysis may be distorted during the course of infectious diseases.
- A few days before the event, you do not need to abuse smoking or alcohol, it is long withdrawn from the body, it will have a bad effect on the results.
- Sports will have to be postponed for several days.
Important! Smoking negatively affects the delivery of absolutely any blood test, the substances that make up the cigarettes, violate the physiological processes of the body.
Smoking before testing can lead to incorrect results. Before you take the test you need to try at least within 12-24 hours to refrain from smoking.
