A blood test is a frequently prescribed procedure for identifying a specific medical condition in a person. All experts agree on whether smoking is allowed before the tests.
Nicotine influences the biochemical parameters of the blood. An alkaloid can help the specialist misinterpret test results.
Influence on the blood count
Before carrying out the study, the doctor warns the patient why the prohibitions must be observed in preparation for it. Whether smoking affects a blood test does not depend on the type, brand and composition of the cigarettes. Nicotine changes the structure of the biomaterial significantly. The consequence of its use can be the receipt of incorrect information. This also applies to marijuana and any other type of smoke herb. Their use can be a reason to refer a patient to a narcologist for examination. Smoking water pipes also skews results.
A bad habit has the following effects on the indicators of human biomaterial:
- changes the cell karyotype;
- leads to a change in the properties of platelets;
- increases the cholesterol level;
- adjusts the hormone ratio;
- converts biochemical substrates;
- leads to incorrect hemoglobin levels;
- increases the concentration of cortisol and catecholamines.
Smoking tobacco in the latter case leads to 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 makes the process of removal from the patient slightly more difficult.
Due to nicotine, the oxygen supply to the internal organs is reduced. The combination of hemoglobin and carbon monoxide creates a new substance. It cannot oxygenate tissues.
Oxyhemoglobin provokes its acute deficiency. Lack of oxygen makes a person feel uncomfortable.
Attention!A smoker's lymphocyte count increases within an hour of using nicotine. A high concentration of these elements, if carried out correctly, is an indicator of the development of inflammation in the body. Smoking causes the doctor to get a false health result.
A person who is used to smoking a pack of cigarettes a day artificially increases hemoglobin levels. The study may not show that the patient has really low protein levels and pre-existing iron deficiency anemia.
Results of the finger blood donation
This process must be performed on an empty stomach. The doctor forbids smoking before the biomaterial is handed over by the finger. If the patient has consumed nicotine, he has an increased catecholamine index already in the first 30 minutes. The cortisol level in the fluid also increases significantly.
With changes, a decreased level of eosinophils is observed. At the same time, the concentration of neutrophils increases. The result is a distortion of the picture of the study.
Do not smoke for at least an hour before removing biomaterial from a finger. Doctors have calculated how many hours you can smoke before starting the procedure. You can do this in 4 hours, but it is better to abstain for 12 hours or a day.
Analysis of biomaterial from a vein
This type of study, with proper preparation, allows you to identify the greatest number of pathologies in a patient. Blood is drawn from a vein for general, immunological, and biochemical analysis.
The specialist forbids smoking before the procedure. Nicotine tends to change the structure of the blood. Due to the action of the alkaloid and tobacco smoke, a lack of oxygen occurs, a failure in blood flow. The result is a distortion of the data obtained on the liquid.
Venous blood is considered the most informative biomaterial. Your fence is designed to confirm or deny the presence of the following diseases:
- virus infections;
- liver and kidney diseases;
- cancerous tumors;
- injuries in the digestive tract;
- Disorders of the hormonal activity of the body.
If HIV is suspected, blood is donated from a vein. Smoking is prohibited 4 hours before the procedure.
Biomaterial from a vein is also taken to detect hepatitis. The patient must give up tobacco for three days prior to the study. If syphilis is detected, smoking must be avoided for several days before analysis.
In addition, the patient should donate blood on an empty stomach. He is not allowed to eat anything 12 hours before his studies.
Blood donation for glucose and smoking
Research is needed to identify a person with diabetes. Doctors recommend not to smoke for at least an hour before the procedure. Nicotine itself does not have a significant effect on glucose levels, but the alkaloid does affect other parameters of the biomaterial. In fact, it is not recommended to smoke 12 hours or a day before a sugar test.
Research into biomaterial for hormones
An alkaloid can negatively affect hormones and the function of the glands in the body. Smoking cessation is required prior to such examinations.
Avoiding a bad habit is required for 3 days before measuring testosterone levels in men, as the property of nicotine is known to decrease production by the testes.
When testing 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, after confirmation, is recommended to completely give up the bad habit.
Nicotine can interfere with thyroid hormone tests. She is very vulnerable to tobacco.
It is necessary not to smoke for three days before ingesting fluids to test thyroid function.
Particularly important!A bad habit leads a person to develop thrombocytopenia. The disease is characterized by a bleeding disorder. Internal bleeding may occur. This pathology is also dangerous, since there is a high probability that clots (thrombi) will form in the vessels, which are a threat to life.
How does it affect the donation?
Nicotine not only changes the cell, but also the plasma structure of the blood. A person who chooses to become a donor undergoes a special study. Before the analysis, he must abstain from alcohol for two days. It is important to stop smoking a few hours before starting the study as nicotine changes plasma biochemistry significantly.
Habit and urinalysis
Experts clearly 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 draw body fluids. Tobacco and its components affect the composition of urine. In addition, if a person has smoked a narcotic herb, the analysis shows that it is present in the urine.
Therefore, doctors strongly advise patients not to use nicotine before submitting a biomaterial for analysis, as smoking tobacco can have a significant impact on its composition.
Cigarettes noticeably affect a person's hormonal background, and smoking just before the study can significantly skew the picture of the results and lead to an incorrect diagnosis.