A blood test is a procedure often prescribed to identify a specific medical condition in a person. All experts are unanimous about whether it is possible to smoke before taking tests.
Nicotine affects the biochemical parameters of the blood. An alkaloid can contribute to specialist misinterpretation of test results.
Influence on blood count
Before conducting a study, the doctor warns the patient why it is necessary to comply with the prohibitions regarding preparing for it. Whether smoking affects a blood test does not depend on the type, brand and composition of the cigarettes. Nicotine significantly changes the structure of the biomaterial. The consequence of using it can be getting the wrong information. This also applies to marijuana and any other type of smoking herb. Their use may be a reason for referring a patient for examination to a narcologist. Hookah smoking also distorts the results.
A bad habit has the following effect on human biomaterial indicators:
- modifies cell karyotype;
- leads to a change in platelet properties;
- increases cholesterol value;
- regulates the ratio of hormones;
- converts biochemical substrates;
- makes false hemoglobin levels;
- increases the concentration of cortisol and catecholamines.
Smoking in the latter case provokes a rapid decrease in the biological fluid of eosinophils with neutrophils. There are deviations in overall performance.
Due to the release of catecholamines, arterioles spasm occurs, which leads to deterioration of blood flow. The fluid itself becomes thicker, which slightly complicates the process of its uptake by the patient.
Due to nicotine, the oxygen supply to the internal organs is reduced. As a result of the combination of hemoglobin and carbon monoxide, a new substance appears. Cannot provide oxygen to tissues.
Oxyhemoglobin provokes its acute absence. Oxygen starvation makes a person feel unwell.
Attention!A smoker's lymphocyte count increases within one hour of nicotine use. A high concentration of these elements, when performed properly, is an indicator of the development of inflammation in the body. Smoking leads 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 could not reveal that the patient has a really low protein value and existing iron deficiency anemia.
Results of finger blood donation
This procedure should be done on an empty stomach. The doctor stops smoking before handing over the biomaterial from the finger. 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 the changes, a reduced value of eosinophils is observed. At the same time, the concentration of neutrophils increases. The result is a distortion of the study view.
Do not smoke for at least one hour before taking the biomaterial from your 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.
Analysis of biomaterial by vein
This type of study, with proper preparation, allows you to identify the largest number of pathologies in a patient. Blood from a vein is taken for general, immunological and biochemical tests.
The specialist stops 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 fluid.
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 pathologies;
- carcinogenic tumors;
- disorders of the digestive tract;
- disruption in the hormonal activity of the body.
Blood is donated intravenously if HIV is suspected. Smoking is prohibited 4 hours before the procedure.
Biomaterial is also taken intravenously to detect hepatitis. The patient is asked to quit smoking three days before the study. If syphilis is detected, it is also necessary to avoid smoking for a few days before the test.
Furthermore, the patient must donate blood on an empty stomach. He is forbidden to eat 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 at least one hour before the procedure. Nicotine itself does not have a significant effect on glucose levels, but the alkaloid affects other biomaterial indicators. In fact, it is not recommended to smoke 12 hours or days before the sugar test.
Search for biomaterials for hormones
An alkaloid can negatively affect the body's hormones and glandular function. Smoking cessation is required before any such study.
Avoiding a bad habit is required for 3 days before testosterone levels in men are determined, as it is known that the property of nicotine reduces its production by the testicles.
When doing a hCG test, the female body should 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 give up the bad habit completely.
Nicotine can interfere with thyroid hormone testing. She is very exposed to tobacco.
it is necessary not to smoke for three days before taking the juice to examine thyroid function.
Especially important!A bad habit provokes the development of thrombocytopenia in a person. The disease is characterized by a bleeding disorder. Internal bleeding may result. This pathology is also dangerous with a high probability of formation of clots (thrombi) in the vessels, posing a threat to life.
How does it affect donation?
Nicotine changes 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 needs to avoid alcohol for two days. Importers It is important to quit smoking a few hours before the start of the study, as nicotine significantly alters plasma biochemistry.
Habit and urine analysis
Experts undoubtedly answer the question of whether smoking is allowed before passing a urine test. They do not recommend using nicotine at least one hour before urination in order to absorb body fluid. Tobacco and its components affect the composition of urine. Moreover, if a person smokes any narcotic drug, then the analysis will reveal its presence in the urine.
Thus, doctors strongly discourage patients from using nicotine before submitting a biomaterial for analysis, as smoking can have a significant effect on its composition.
Cigarettes significantly affect a person's hormonal background, and smoking immediately before the study can significantly distort the picture of its results and lead to a misdiagnosis.