A blood test is a frequently prescribed procedure to identify a specific medical condition in a person. All experts are unanimous that it is possible to smoke before taking the tests.
Nicotine affects the biochemical parameters of the blood. An alkaloid can contribute to the specialist's misinterpretation of the test results.
Impact on blood count
Before conducting a study, the doctor warns the patient why it is necessary to observe the prohibitions regarding preparation for it. Whether smoking affects a blood test is independent of the type, brand and composition of the cigarettes. Nicotine significantly changes the structure of the biomaterial. The consequence of its use could be the receipt of incorrect information. This also applies to marijuana and any other type of smoking weed. Their use can be a reason for referring a patient for examination to a narcologist. Hookah smoke also distorts the results.
A bad habit has the following effect on human biomaterial indicators:
- modifies the cell karyotype;
- leads to a change in the properties of platelets;
- increases the cholesterol value;
- regulates the ratio of hormones;
- converts biochemical substrates;
- produces false hemoglobin levels;
- increases the concentration of cortisol and catecholamines.
Tobacco smoke in the latter case causes a rapid decrease in the biological fluid of eosinophils with neutrophils. There are deviations in the overall performance.
Due to the release of catecholamines, a spasm of the arterioles occurs, which leads to a deterioration in blood flow. The liquid itself becomes more viscous, which slightly complicates the withdrawal process from the patient.
Due to nicotine, the oxygen supply to internal organs is reduced. As a result of the combination of hemoglobin and carbon monoxide, a new substance appears. It cannot deliver oxygen to the tissues.
Oxyhemoglobin causes its severe deficiency. Oxygen starvation causes a person to feel unwell.
Attention!A smoker's lymphocyte count increases within one hour of using nicotine. A high concentration of these elements, when carried out correctly, is an indicator of the development of inflammation in the body. Smoking leads the doctor to receive a false health result.
A person who is used to smoking a pack of cigarettes a day artificially increases the level of hemoglobin. The study may not reveal that the patient has very low protein value and existing iron deficiency anemia.
Results of donating finger blood
This procedure must be performed on an empty stomach. The doctor forbids smoking before delivering the biomaterial from the finger. If the patient has used nicotine, in the first 30 minutes he has an increase in the level of catecholamines. The level of cortisol in the fluid also increases significantly.
With changes, a decrease in the value of eosinophils is observed. At the same time, the concentration of neutrophils increases. The result is a distortion of the studio image.
Do not smoke for at least one hour before taking the biomaterial from a finger. Doctors have calculated how many hours before the procedure starts smoking is allowed. You can do this in 4 hours, but it's best to abstain for 12 hours or a day.
Analysis of biomaterial from a vein
This type of study, with adequate preparation, allows you to identify the largest number of pathologies in a patient. Blood from a vein is taken for general, immunological and biochemical analyzes.
The specialist prohibits smoking before the procedure. Nicotine tends to change the structure of the blood. Due to the action of alkaloids and tobacco smoke, oxygen deficiency occurs, a breakdown occurs in the bloodstream. The result is a distortion of the data obtained on the liquid.
Venous blood is considered the most informative biomaterial. Its fence is made to confirm or deny the presence of the following diseases:
- viral infections;
- liver and kidney diseases;
- cancerous tumors;
- violations in the digestive tract;
- disruption of the body's hormonal activity.
Blood is donated from a vein if HIV is suspected. Smoking is prohibited 4 hours before the procedure.
Biomaterial is also taken from a vein to detect hepatitis. The patient is required to give up tobacco three days before the study. If syphilis is detected, it is also necessary to avoid smoking for several days before the analysis.
In addition, the patient must donate blood on an empty stomach. He is forbidden to eat food 12 hours before the study.
Donation of blood for glucose and smoking
Research is needed to identify a person with diabetes. Doctors do not recommend smoking at least one hour before the procedure. Nicotine itself does not have a significant effect on glucose levels, but the alkaloid affects other parameters of the biomaterial. In fact, it is not recommended to smoke 12 hours or days before the sugar test.
Research of biomaterials for hormones
An alkaloid can adversely affect hormones and glandular function in the body. Quitting smoking is necessary before any such research.
It is necessary to avoid a bad habit for 3 days before determining the level of testosterone in men, since the property of nicotine is known to reduce its production by the testicles.
When performing an analysis for hCG, the female body must stop smoking at least 2 hours before the test. This hormone is an indicator of the onset of pregnancy. A woman is recommended, after confirmation, to completely give up the bad habit.
Nicotine can interfere with the thyroid hormone test. It is highly susceptible to tobacco.
It is necessary not to smoke for three days before taking fluids to examine thyroid function.
Especially important!A bad habit causes thrombocytopenia to develop in a person. The disease is characterized by a bleeding disorder. Internal bleeding may occur. This pathology is also dangerous with a high probability of the formation of clots (thrombi) in the vessels, which pose a threat to life.
How does it affect the donation?
Nicotine modifies not only the cellular structure, but also the plasma structure of the blood. A person who decides to become a donor undergoes a special study. Before the analysis, he must avoid alcohol for two days. It is important to stop smoking a few hours before the start of the study, as nicotine significantly alters the biochemistry of the plasma.
Habits and urinalysis
Experts unequivocally answer the question of whether smoking is allowed before passing a urine test. They don't recommend using nicotine at least an hour before urinating to attract body fluid. Tobacco and its components affect the composition of urine. Also, if a person has smoked a narcotic herb, the analysis will reveal its presence in the urine.
Therefore, doctors strongly discourage patients from using nicotine before subjecting a biomaterial for analysis, as tobacco smoke can have a significant effect on its composition.
Cigarettes greatly affect the human hormonal background, and smoking immediately before the study can significantly distort the picture of its results and lead to misdiagnosis.