A blood test is a frequently prescribed procedure to identify a specific medical condition in a person. All the experts are unanimous as to whether it is possible to smoke before taking the tests.
Nicotine affects the biochemical parameters of the blood. An alkaloid can contribute to the specialist misinterpreting test results.
Impact on blood counts
Before conducting a study, the doctor advises the patient why it is necessary to observe the prohibitions regarding preparation. Whether smoking affects a blood test does not depend on the type, brand and composition of cigarettes. Nicotine significantly changes the structure of the biomaterial. The consequence of its use may be the receipt of erroneous information. This also applies to marijuana and any other type of smoking weed. Its use may be a reason to refer a patient to a narcologist for examination. Smoking hookah also distorts the results.
A bad habit has the following effect on human biomaterial indicators:
- modifies the cellular karyotype;
- leads to a change in platelet properties;
- increases the cholesterol value;
- adjusts the ratio of hormones;
- converts biochemical substrates;
- generates false hemoglobin levels;
- increases the concentration of cortisol and catecholamines.
Smoking 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 arterioles occurs, leading to impaired blood flow. The liquid itself becomes more viscous, slightly complicating the process of taking it from the patient.
Due to nicotine, oxygen supply to internal organs is reduced. As a result of the combination of hemoglobin and carbon monoxide, a new substance appears. It cannot provide oxygen to the tissues.
Oxyhemoglobin causes its acute shortage. Lack of oxygen makes a person feel bad.
Attention!A smoker's lymphocyte count increases one hour after using nicotine. A high concentration of these elements, when done correctly, is an indicator of the development of inflammation in the body. Smoking causes the doctor to receive a false health result.
A person who is used to smoking a pack of cigarettes a day artificially increases the hemoglobin level. The study may not reveal that the patient has a really low protein value and an existing iron deficiency anemia.
Finger blood donation results
This procedure should be done on an empty stomach. The doctor prohibits smoking before handing over the finger biomaterial. If the patient has used nicotine, then already in the first 30 minutes he has an increased catecholamine index. 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 an hour before taking biomaterial from a finger. Doctors have calculated how many hours before the start of the procedure smoking is allowed. You can do this in 4 hours, but it is better to abstain for 12 hours or a day.
Single vein biomaterial analysis
This type of study, with adequate preparation, allows to identify the greatest number of pathologies in a patient. Blood is drawn from a vein for general, immunological, and biochemical analysis.
The specialist prohibits smoking before the procedure. Nicotine tends to change the structure of the blood. Due to the action of the alkaloid and tobacco smoke, oxygen starvation occurs, a failure in blood flow occurs. The result is a distortion of the data obtained on the liquid.
Venous blood is considered the most informative biomaterial. Your fence is made to confirm or deny the presence of the following diseases:
- viral infections;
- liver and kidney pathologies;
- cancerous tumors;
- violations in the digestive tract;
- disruptions in 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 removed from a vein to detect hepatitis. The patient is required to stop smoking three days before the study. If syphilis is detected, it is also necessary to avoid smoking for several days before the test.
In addition, the patient must donate blood on an empty stomach. You are prohibited from eating food 12 hours before the study.
Blood donation for glucose and smoking
Research is needed to identify a person with diabetes. Doctors do not recommend smoking for at least an 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, smoking 12 hours or days before the sugar test is not recommended.
Biomaterial research for hormones
An alkaloid can negatively affect hormones and glandular function in the body. It is necessary to stop smoking before any such investigation.
It is necessary to avoid a bad habit for 3 days before determining the level of testosterone in men, since it is known that the property of nicotine reduces its production in the testicles.
When testing for hCG, the female body should stop smoking at least 2 hours before testing. This hormone is an indicator of the onset of pregnancy. A woman is advised, upon confirmation, to completely give up the bad habit.
Nicotine can interfere with thyroid hormone tests. She is very susceptible to tobacco.
It is necessary not to smoke for three days before drinking fluids to test thyroid function.
Especially important!A bad habit causes the development of thrombocytopenia in a person. The disease is characterized by a bleeding disorder. It can result in internal bleeding. This pathology is also dangerous with a high probability of the formation of clots (thrombi) in the vessels, which represents a threat to life.
How does the donation affect?
Nicotine changes not only the cell structure, but also the plasma structure of the blood. A person who decides to become a donor undergoes a special study. Before the analysis, you should avoid alcohol for two days. It is important to stop smoking a few hours before the start of the study, since nicotine significantly alters the plasma biochemistry.
Urine and habit analysis
Experts unambiguously answer the question of whether smoking is allowed before passing the urine test. They do not recommend using nicotine at least an hour before urinating to extract bodily fluids. Tobacco and its components affect the composition of urine. Also, if a person smoked any narcotic herb, the analysis will reveal its presence in the urine.
Therefore, doctors strongly advise against patients using nicotine before submitting a biomaterial for testing, as tobacco smoking can have a significant effect on its composition.
Cigarettes markedly affect the human hormonal background, and smoking immediately before the study can significantly distort the picture of your results and lead to a misdiagnosis.