Blood test in men, women and children: norm and deviation in general clinical, biochemical, immunological, hormonal and serological

Types of blood tests
General clinical blood test
Metrics collected
Decoding the results: norm and deviation
When to take it
Blood chemistry
Metrics collected
Decoding the results: norm and deviation
When to take it
Immunological blood test
Metrics collected
Decoding the results: norm and deviation
When to take it
Hormonal blood test
Metrics collected
Decoding the results: norm and deviation
When to take it
Serological blood test
Serological blood test methods
What is the result of a serological blood test?
When to take it
How and where to get a blood test

Blood is taken for analysis in order to determine the state of the body and its functionality, identify organ diseases, hormonal imbalances, lack of vitamins and nutrients, find out about the presence of viruses and infections, inflammatory processes and other diseases. Blood is also taken to monitor the progress of pregnancy and to identify its group and Rh factor.

Types of blood tests

There are 5 main types of blood tests:

General clinical blood test
, which is carried out as part of a general clinical examination of the patient. Allows you to assess your overall health and identify a number of problems that will require further diagnosis.
A biochemical blood test
allows you to analyze the functioning of internal organs, metabolism, metabolism and the body’s need for trace elements and vitamins;
Immunological blood test
- detects viral, infectious, oncological and allergic diseases;
A hormonal blood test
allows you to determine the level of hormones and draw conclusions about the correct functioning of the thyroid gland, pituitary gland, adrenal glands, genital organs and others.
A serological blood test
shows the stage of the infectious process.

Each test examines a number of blood parameters in a laboratory setting. Depending on the purpose of the study, the maximum number of parameters or a small part that is important for identifying violations is studied. Based on the results of the analysis, the patient receives a table with blood parameters and their values, which are then deciphered by the doctor, prescribe additional tests and make a diagnosis.

In addition, there are other tests, for example, blood type and Rh factor. This information is important for serious illnesses such as blood transfusions and organ transplants.

How to treat leukocytosis?

Treatment can be prescribed only after the exact cause of this phenomenon has been established, for example, physiological leukocytosis is considered to be the norm. As soon as the causative agent of the infection is detected, the following drugs may be prescribed to the small patient:

Antiviral agents that effectively fight viruses.
In severe cases, antibiotics may be prescribed, but they are taken only as prescribed by a doctor.
Chemotherapy drugs that are aimed at maintaining the immune system.

Sometimes, when leukocytosis is detected in children and the blood has a viscous consistency, leukapheresis is prescribed, during which the blood is purified.

General clinical blood test

It is carried out as part of a general clinical examination of the patient and allows you to learn about the condition of the blood and the body as a whole. The main indicators of this analysis are: hemoglobin, the number of leukocytes (white blood cells), erythrocytes (red blood cells) and platelets (nuclear-free plates of blood responsible for clotting).

Due date and how to prepare

A general blood test is taken in the morning on an empty stomach, often from a finger, less often from a vein. You should not drink or eat 4 hours before the test.

Metrics collected

Now a general blood test is carried out on automatic hematological analyzers, which can simultaneously determine values from 5 to 24 parameters.

The main indicators collected are:

Hemoglobin (HGB - hemoglobin)
- the main component that is involved in the transfer of oxygen in the blood from the lungs to organs and tissues, and carbon dioxide back to the lungs, is the blood pigment of red blood cells.
Red blood cells (RBC - red blood cells)
are red blood cells that carry oxygen in the blood to organs and tissues.
Leukocytes (WBC - white blood cells)
are white blood cells produced in the bone marrow that carry out immune control and protect the body from foreign cells.
Thrombocytes (PLT - platelets)
are nuclear-free platelets of blood responsible for clotting.
Lymphocytes (LYM - lymphocyte)
are cells of the immune system that respond to viruses and microbes.
Monocytes (MON - monocyte)
are large cells of the immune system.
Hematocrit (HCT - hematocrit)
is the volume of red blood cells in the blood.
Blood color index (BI)
, demonstrating the concentration of hemoglobin in red blood cells.
Erythrocyte sedimentation rate
, which, if deviated from the norm, may indicate a pathological condition of the body.
Various erythrocyte, leukocyte and platelet indices
.

Decoding the results: norm and deviation

The normal values of the blood parameters studied in each laboratory are different and depend on the gender, age and condition of the patient. Only a doctor can make a correct interpretation of the blood test results and make a diagnosis, taking into account all aspects of the patient’s health. Below are frequently examined blood parameters, their normal values, and what a deviation from the norm may indicate in the general case, and not in the specific case. To obtain an individual interpretation and diagnosis, you should consult a doctor.

Hemoglobin (HGB - hemoglobin)

Normal hemoglobin level in blood:

Men:

from 12 to 15 years: 120 - 160 g/l;
from 15 to 18 years: 117 - 166 g/l;
from 18 to 45 years: 132 - 173 g/l;
from 45 to 65 years: 131 - 172 g/l;
over 65 years old: 126 - 174 g/l.

Women:

from 12 to 15 years: 115 - 150 g/l;
from 15 to 18 years: 117 - 153 g/l;
from 18 to 45 years: 117 - 155 g/l;
from 45 to 65 years: 117 - 160 g/l;
over 65 years old: 120 - 161 g/l.

Children:

up to 2 weeks: 134 - 198 g/l;
from 2 to 4.3 weeks: 107 - 171 g/l;
from 4.3 to 8.6 weeks: 94 - 130 g/l;
from 8.6 weeks to 4 months: 103 - 141 g/l;
at 4 to 6 months: 111 - 141 g/l;
from 6 to 9 months: 114 - 140 g/l;
from 9 to 1 year: 113 - 141 g/l;
from 1 year to 5 years: 100 - 140 g/l;
from 5 years to 10 years: 115 - 145 g/l;
from 10 to 12 years: 120 - 150 g/l;

Deviation of hemoglobin in the blood from the norm may indicate:

when decreasing by:

overhydration - increased water content in the body due to impaired water-salt metabolism;
anemia - disruption of the oxygen transport function in the body and the development of hypoxia.

when increasing by:

dehydration - loss of water in the body;
polycythemia vera - increased blood viscosity and decreased blood flow;
excessive smoking.

Red blood cells (RBC - red blood cells)

Norm of red blood cells in the blood:

Men:

from 12 - 18 years: 4.5 - 5.3 * 10^12/l;
over 18 years old: 4.0 - 5.0 * 10^12/l.

Women:

from 12 - 18 years: 4.1 - 5.1 * 10^12/l;
over 18 years old: 3.5 - 4.7 * 10^12/l.

Children:

newborn: 3.9 - 5.5 * 10^12/l;
from 1 to 3 days: 4.0 - 6.6 * 10^12/l;
in 1 week: 3.9 - 6.3 * 10^12/l;
in week 2: 3.6 - 6.2 * 10^12/l;
at 1 month: 3.0 - 5.4 * 10^12/l;
in the 2nd month: 2.7 - 4.9 * 10^12/l;
from 3 to 6 months: 3.1 - 4.5 * 10^12/l;
from 6 months to 2 years: 3.7 - 5.3 * 10^12/l;
from 2 to 6 years: 3.9 - 5.3 * 10^12/l;
from 6 to 12 years: 4.0 - 5.2 * 10^12/l.

Normal erythrocyte indices:

MCV
: 80 - 95 fl - average erythrocyte volume;
MCH
: 27 - 31 pg - average hemoglobin content in an individual red blood cell;
MCHC
: 320 - 360 g/l - average hemoglobin concentration in the erythrocyte mass;
RDW
: 11.5% - 14.5% - red blood cell distribution width;
RDW-SD
: 37 - 54 fl - deviation of the distribution of red blood cells by volume;
RDW-CV
: 11.5 - 14.5% (adults), 14.9 - 18.7% (children up to 6 months) and 11.6 - 14.8% (children over 6 months) - deviation of red blood cell size from averages;
P-LCR
: 13 - 43% - large platelet ratio;
ESR
: 10 mm/hour (men), 15 mm/hour (women) - erythrocyte sedimentation rate, deviation of which from the norm may indicate a pathological or inflammatory process in the body.

Deviation of red blood cells from the norm may indicate:

when decreasing by:

anemia;
blood loss;
pregnancy;
overhydration;
decrease in the intensity of red blood cell formation in the bone marrow;
therapy with diuretics;
accelerated destruction of red blood cells.

when increasing by:

burn;
diarrhea;
hydrocele of the renal pelvis;
true polycythemia;
Cushing's syndrome;
neoplasms;
steroid use;
the effect of corticosteroids;
taking diuretics.

Leukocytes (WBC - white blood cells)

Norm of leukocytes in the blood:

Men and women:

from 16 years and older: 4.0 - 9.0 * 10^9/l.

Children:

up to 1 year: 6.0 - 17.5 * 10^9/l;
from 1 year to 2 years: 6.0 - 17.0 * 10^9/l;
from 2 to 4 years: 5.5 - 15.5 * 10^9/l;
from 4 to 6 years: 5.0 - 14.5 * 10^9/l;
from 6 to 10 years: 4.5 - 13.5 * 10^9/l;
from 10 to 16 years: 4.5 - 13.0 * 10^9/l.

Norm of leukocyte indices:

LYM% (LY%)
: 25 - 40% - relative content of lymphocytes;
LYM# (LY#)
: 1.2 - 3.0 * 10^9/l (1.2-3.0 x 10^3/μl) - absolute lymphocyte content;
MXD% (MID%)
: 5 - 10% - the relative content of a mixture of monocytes, eosinophils and basophils;
MXD# (MID#)
: 0.2 - 0.8 * 10^9/l - absolute content of a mixture of monocytes, eosinophils and basophils;
NEUT% (NE%)
: 40% - 75% - relative content of neutrophils;
NEUT# (NE#)
: 2 - 7.5 * 10^9/l - absolute content of neutrophils;
MON% (MO%)
: 4 - 11% - relative content of monocytes;
MON# (MO#)
: 0.1 - 0.6 * 10^9 cells/l - absolute content of monocytes;
EO%
: 1 - 5% - relative content of eosinophils;
EO#
: 0.4 * 109/l - absolute eosinophil content;
BA%
: less than 1% - relative content of basophils;
BA#
: 0 - 0.08 * 10^9/l - absolute content of basophils;
IMM%
: 1 - 5% - relative content of immature granulocytes;
IMM#
: 1.2 - 6.8 * 10^9/l - absolute content of immature granulocytes;
ATL%
: less than 5% - the relative content of atypical lymphocytes;
ATL#
: 0.06 - 0.15 * 10^9/l - absolute content of atypical lymphocytes;
GR% (GRAN%)
: 47 - 72% - relative content of granulocytes;
GR# (GRAN#)
: 1.2 - 6.8 * 10^9/l (1.2 - 6.8 * 10^3/μl) - absolute granulocyte content.

Deviation of leukocytes in the blood from the norm may indicate:

when decreasing by:

typhus;
viral diseases;
bone marrow diseases and damage;
anaphylactic shock;
leukemia;
viral diseases;
radiation sickness;
Addison-Biermer disease;
collagenosis;
myelodysplastic syndromes;
hypersplenism;
myelofibrosis;
plasmacytoma;
taking certain antibiotics and anti-inflammatory drugs;
anemia.

when increasing by:

the presence of inflammatory processes in the body;
sepsis;
purulent processes;
tissue injuries;
myocardial infarction;
infectious diseases;
the presence of malignant neoplasms;
last trimester of pregnancy;
period of feeding the baby with breast milk;
great physical activity.

Thrombocytes (PLT - platelets)

Normal platelet count in blood:

Men, women and children:

all ages - 180 - 320 * 10^9 cells/l.

Normal platelet indices:

MPV (mean platelet volume): 7 - 10 fL - average platelet volume;
PDW: 9 - 16% - width of platelet distribution by volume;
PCT (platelet crit): 0.108 - 0.282% - the proportion of blood volume occupied by platelets.

Deviation of platelets in the blood from the norm may indicate:

when decreasing by:

bronchial asthma;
malaria;
thrombocytopenia;
malignant neoplasm;
Sumter's syndrome.

when increasing by:

essential thrombocythemia

Lymphocytes (LYM - lymphocyte)

Norm of lymphocytes in the blood:

Men and women:

from 16 years and older: 20 - 40%.

Children:

newborns: 15 - 35%;
up to 2 weeks: 22 - 55%;
from 2 weeks to 1 year: 45 - 70%;
from 1 year to 2 years: 37 - 60%;
from 2 to 5 years: 33 - 55%;
from 6 to 7 years: 30 - 50%;
from 8 to 9 years: 30 - 50%;
from 9 to 11 years: 30 - 46%;
from 12 to 15 years: 30 - 45%.

Deviation of lymphocytes in the blood from the norm may indicate:

when decreasing by:

autoimmune diseases;
diseases of the nervous system;
HIV infection;
side effects from taking medications.

when increasing by:

viral diseases;
bacterial infections;
fungal diseases;
toxoplasmosis;
tuberculosis;
whooping cough;
vasculitis;
malignant neoplasms;
initial stage of HIV;
excess carbohydrates in the body compared to fats and proteins;
thyroid diseases;
starvation.

Monocytes (MON - monocyte)

Norm of monocytes in the blood:

Men and women:

from 16 years and older: 3 - 9%.

Children:

newborns: 3 - 12%;
up to 2 weeks: 5 - 15%;
from 2 weeks to 1 year: 4 - 10%;
from 1 year to 2 years: 3 - 10%;
from 2 to 5 years: 3 - 9%;
from 6 to 7 years: 3 - 9%;
from 8 to 9 years: 3 - 9%;
from 9 to 11 years: 3 - 9%;
from 12 to 15 years: 3 - 9%.

Deviation of monocytes in the blood from the norm may indicate:

when decreasing by:

use of immunosuppressants;
hereditary diseases.

when increasing by:

stress;
diabetes;
atherosclerosis;
bacterial infections;
malignant neoplasms;
sepsis;
collagenosis;
sarcoidosis

Hematocrit (HCT - hematocrit)

Hematocrit norm:

Men:

from 12 to 15 years: 35 - 45%;
from 15 to 18 years: 37 - 48%;
from 18 to 45 years old: 42 - 50%;
from 45 to 65 years: 39 - 50%;
over 65 years old: 37 - 51%.

Women:

from 12 to 15 years: 34 - 44%;
from 15 to 18 years: 34 - 44%;
from 18 to 45 years old: 38 - 47%;
from 45 to 65 years: 35 - 47%;
over 65 years old: 35 - 47%.

Children:

up to 2 weeks: 41 - 65%;
from 2 to 4.3 weeks: 33 - 55%;
from 4.3 to 8.6 weeks: 28 - 42%;
from 8.6 weeks to 4 months: 32 - 44%;
from 4 to 6 months: 31 - 41%;
from 6 to 9 months: 32 - 40%;
from 9 to 12 months: 33 - 41%;
from 1 year to 3 years: 32 - 40%;
from 3 to 6 years: 32 - 42%;
from 6 to 9 years: 33 - 41%;
from 9 to 12 years: 34 - 43%.

A hematocrit deviation from the norm may indicate:

when decreasing by:

pregnancy;
anemia;
children's age;
hypoproteinemia;
overhydration.

when increasing by:

true polycythemia;
hypoxia;
kidney hydronephrosis;
kidney neoplasm;
polycystic kidney disease;
peritonitis;
burn disease;
leukemia;
dehydration.

Blood color index (BC)

Normal blood color index:

Men, women and children:

all ages: 0.9 - 1.1.

A deviation of the blood color indicator from the norm may indicate:

when decreasing by:

anemia;
purulent infections;
cirrhosis of the liver;
tuberculosis;
Iron-deficiency anemia;
iron-saturated hypochromia;
malignant neoplasms;
thalassemia;
microcytosis.

when increasing by:

lack of vitamin B12;
lack of folic acid;
dysbacteriosis;
chronic pancreatitis;
stomach diseases;
diseases of the small intestine;
cirrhosis of the liver;
long-term treatment with glucose-lowering drugs;
long-term treatment with anti-tuberculosis drugs;
poor nutrition.

When to take it

A general clinical blood test must be taken:

As prescribed by a doctor;
As a preventative measure to assess general health;
As part of routine medical examinations and examinations.

Platelets

Platelets are also red blood cells. They look like small plates. Their main purpose is normal blood clotting.

Platelets in test results indicate:

tr.;
PLT;
platelets.

Table No. 6: platelet norms in children

There are:

Thrombocytopenia - when platelets in the blood are less than normal;
Thrombocytosis - if more than normal.

Let's decipher the results:

Clinical blood analysis: from light microscope to hematological analyzers

In modern laboratories, platelet indices are also determined.

Blood chemistry

A laboratory blood test that gives an idea of the condition of internal organs and their functionality. Allows you to evaluate metabolism and find out about the lack of microelements in the body.

Due date and how to prepare

A biochemical blood test is taken in the morning on an empty stomach from a vein. You should not eat 12 hours before the test. You can only drink clean water, but drinks, including tea, coffee and any others, are not allowed. 24 hours before the test you must give up alcohol, smoking and physical activity.

Metrics collected

Glucose
- blood sugar level;
Urea
is a parameter important for assessing kidney function;
Cholesterol
is an element that determines the risk of cardiovascular diseases;
LDL cholesterol
is an element that determines the risk of cardiovascular disease;
HDL cholesterol
is an element that determines the risk of cardiovascular disease;
Residual blood nitrogen
is a parameter important for assessing kidney function;
Atherogenicity coefficient (Ka)
- shows the risk of developing atherosclerosis;
Total bilirubin
is an indicator that may indicate the presence of jaundice;
Total protein
is an indicator that allows you to evaluate liver function;
AST (AST)
is an indicator that allows you to evaluate the work of the heart;
AlAt (ALT)
is an indicator that allows you to evaluate liver function;
Lipase
is an indicator that allows you to evaluate the functioning of the pancreas;
Amylase
is an indicator that allows you to evaluate the functioning of the pancreas;
Gamma-GTP
is an indicator that allows you to evaluate liver function;
Antistreptolysin-O
is an indicator that is used in the diagnosis of rheumatism;
Rheumatic factor
is an indicator that is used in the diagnosis of autoimmune diseases;
CRP (C-reactive protein)
is an indicator that can indicate inflammation in the body;
Alkaline phosphatase
is an indicator of many different diseases and health problems;
Albumin
is a protein that performs many functions in the body;
General lipids
are fats that perform structural and regulatory functions in the body;
Triglycerides
are fats that perform structural and energy functions in the body;
Phospholipids
- an indicator that assesses the metabolism of fats in the body, indicating liver and kidney diseases, and indirectly diabetes mellitus;
Protein fractions
are indicators that may indicate inflammatory processes, infectious and other diseases in the body;
Calcium
is an important element for the nervous and cardiovascular systems;
Potassium
is an element that normalizes heart rhythm and regulates water balance;
Sodium
is an element that regulates the volume of extracellular fluid;
Chlorine
is an element that regulates the acid-base balance of the blood;
Iron
is an element important for binding, transporting and transmitting oxygen throughout the body.

: Can lead to disruption of various body functions.

When to take it

A biochemical blood test must be taken:

As prescribed by a doctor;
As part of routine medical examinations and examinations;
To assess the functioning of internal organs and the functionality of the body;
To determine the need for microelements;
For information about metabolism;
After suffering from infectious or somatic diseases.

Immunological blood test

A laboratory blood test that examines blood serum obtained by centrifugation. The presence and level of antibodies are detected in the serum to determine infectious diseases, allergies, parasitic infestations, autoimmune diseases, immunodeficiency states of the body and neoplasms. An immunological blood test detects infections such as syphilis, chlamydia, mycoplasma, ureaplasma, trichomonas, gonorrhea, herpes, HIV, AIDS, measles, hepatitis, cytomegalovirus, mumps, toxoplasmosis, rubella, coronaviruses, COVID-19 and many others.

Due date and how to prepare

An immunological blood test is taken in the morning on an empty stomach from a vein. You should not eat 12 hours before the test. Avoid alcoholic drinks for 3 days. Avoid solariums and x-rays for 2 days. Don't stress in 1 day. No smoking for 1 hour. You should not do the test during menstruation.

Metrics collected

General indicators of immunological blood test:

Subpopulations of lymphocytes
are different types of white blood cells that recognize various foreign structures, altered body cells and produce antibodies to destroy them. The indicators of this group give a general idea of the state of immunity.
Immunoglobulins
- various types of antibodies, the purpose of which is to destroy infections and toxins. The presence of certain antibodies in the blood indicates the infections they are fighting against. Main types of immunoglobulins:
M (IgM)
- responsible for the body’s primary defense reaction;
G (IgG)
- responsible for the main fight against infections that have entered the body;
E (IgE)
and
D (IgD)
- responsible for the fight against parasites and allergens.

Decoding the results: norm and deviation

Lymphocyte subpopulations

Norm of lymphocyte subpopulation for adults:

T-lymphocytes (CD3+)
: 0.8 - 2.2 * 10^9/l (60 - 80%);
Ratio CD3+CD4+ / CD3+CD8+
: 1,0 — 2,5;
NK cells (CD3-CD16/56+)
: 6 — 20%;
% activated T-cytotoxic lymphocytes (CD3+CD8+HLA-DR+)
: 3 — 19%;
T-cytotoxic lymphocytes (CD3+CD8+)
: 0.3 - 0.9 * 10^9/l;
CD3+CD4+CD8+
: less than 3%;
% activated T helper cells (CD3+CD4+HLA-DR+)
: 2 — 9%;
T-helpers (CD3+CD4+)
: 0.5 - 1.4 * 10^9/l;
% activated T lymphocytes (CD3+HLA-DR+)
: 3 — 10%;
CD3+CD4-CD8
: less than 7%;
T-cytotoxic lymphocytes (CD3+CD8+)
: 19 — 35%;
% cytolytic T lymphocytes (CD3+CD16/56+)
: 0 — 10%;
B lymphocytes (CD19+)
: 7 — 19%;
NK cells (CD3-CD16/56+)
: 0.1 - 0.4 * 10^9/l;
B-lymphocytes (CD19+)
: 0.1 - 0.4 * 10^9/l;
T helper cells (CD3+CD4+)
: 33 — 52%.

An abnormal lymphocyte subpopulation may indicate:

autoimmune diseases;
viral infections;
bacterial infections;
neoplasms;
poisoning;
radioactive exposure;
other health problems.

Immunoglobulin A (IgA)

Norm:

0.6-4.5 g/l.

Deviation of A (IgA) from the norm may indicate:

when decreasing by:

toxic poisoning;
cirrhosis of the liver;
radiation sickness.

when increasing by:

arthritis;
inflammatory processes in the liver.
multiple myeloma;
glomerulonephritis;
skin diseases;
diseases of the digestive system;
respiratory tract diseases.

Immunoglobulin M (IgM)

Norm:

0.25 - 2.5 g/l.

Deviation of M (IgM) from the norm may indicate:

when decreasing by:

poisoning;
immunosuppressants in the body;
radiation sickness.

when increasing by:

viral or bacterial infections;
parasites;
autoimmune processes.

Immunoglobulin G (IgG)

Norm:

5.4 - 18.22 g/l.

Deviation of G (IgG) from the norm may indicate:

when decreasing by:

poisoning;
cirrhosis of the liver;
immunosuppressants;
radiation sickness.

when increasing by:

viral diseases;
bacterial diseases;
fungal diseases;
poisoning by toxins.

Immunoglobulin E (IgE) and D (IgD)

Norm:

E (IgE)
: 0 - 100 IU/ml;
D (IgD)
: 0 to 0.07 g/l.

Deviation of E (IgE) and D (IgD) from the norm may indicate:

when decreasing by:

immunodeficiency;
immunosuppressants.

when increasing by:

parasites;
allergies.

When to take it

An immunological blood test must be taken:

As prescribed by a doctor;
If you suspect a viral or bacteriological infection in the body;
If you suspect an allergy;
If neoplasms are suspected;
If a fungal infection is suspected;
If parasites are suspected.

What is the leukocyte formula and what indicators are studied in it?

Leukocytes are white blood cells that participate in the process of protecting the body from pathogenic factors and microorganisms. There are several types of leukocytes. The number of blood cells changes as a person grows older and as their health changes. The leukocyte formula (leukogram) is the ratio of various white blood particles to their total number in percentage terms.

Types of leukocytes:

Group	Species, subspecies	Description and functions
Granulocytes	Neutrophils	Segmented	Kills viruses and bacteria	They form the basis of the body's defense.
Rod	Formed if segmented cells cannot cope with a bacterial infection.
Myelocytes	Appear only in cases of severe illness.
Eosinophils	They protect against parasites, respond to allergies, oncology, and autoimmune problems.
Basophils	Prevents the spread of bacteria and toxins.
Agranulocytes	Lymphocytes	Participate in the production of antibodies and are responsible for the formation of immunity.
Monocytes	They destroy harmful elements and cleanse the blood of dying cells.

READ ALSO: Why are monocytes and eosinophils in a child’s blood elevated?

Laboratory blood test to determine the concentration of leukocytes

A change in one of the indicators (types of white cells) of the leukocyte formula indicates the activation of pathological processes or disruption of the body systems. In this case, it is possible to increase the number of one type of leukocyte and decrease the content of another. Only a comprehensive analysis of the elements shows a reliable picture of a person’s health status.

Hormonal blood test

A laboratory blood test, which is carried out to study the functioning of the endocrine system and identify diseases of the thyroid gland, pituitary gland, adrenal glands, genital organs and others.

Due date and how to prepare

A hormonal blood test is taken in the morning on an empty stomach from a vein. 1 day before the test you need to give up smoking, alcohol and physical activity. 7 days before this test, you must stop taking hormonal medications. In women, blood is taken for hormonal analysis on days 5-7 of the cycle, counting from the first day of menstruation.

Metrics collected

Thyroid hormones:

T3 (triiodothyronine);
T4 (thyroxine);
Antibodies to thyroglobulin (AT-TG).

Sex hormones:

Testosterone (male sex hormone);
Estrogens (female sex hormones).

Pituitary hormones:

TSH (thyroid stimulating hormone);
FSH (follicle stimulating hormone);
LH (luteinizing hormone);
Prolactin;
ACTH (adrenocorticotropic hormone).

Adrenal hormones:

DEA-s (dehydroepiandrosterone sulfate);
Aldosterone;
Cortisol.

When planning pregnancy:

FSH (follicle stimulating hormone)
- responsible for the growth of the egg;
LH (luteinizing hormone)
- ensures completion of egg maturation;
Prolactin
- stimulates milk production after childbirth;
Estradiol
- affects all female genital organs;
Progesterone (pregnancy signaling hormone)
- produced after the egg matures and is important for the proper course of pregnancy;
DEA-sulfate (DEA-s or DEAS)
.

Decoding the results: norm and deviation

Thyroid hormones

Thyroid hormone levels:

T3 (triiodothyronine)
: 2.6 - 5.7 pmol/l;
T4 (thyroxine)
: 0.7-1.48 ng/dl;
Antibodies to thyroglobulin (AT-TG)
: 0-4.11 U/ml.

Abnormalities in thyroid hormones may indicate:

thyroid diseases;
autoimmune diseases.

Sex hormones

Normal sex hormones:

Testosterone (male sex hormone)
: 4.94 - 32.01 nmol/l (men), 0.38 - 1.97 nmol/l (women);
Estrogens (female sex hormones): progesterone
: 1st phase of the menstrual cycle - 1.0 - 2.2 nM/l; 2nd phase of the menstrual cycle - 23.0 - 30.0 nM/l; for postmenopause - 1.0 - 1.8 nM/l;
estradiol
: 1st phase of the menstrual cycle - 198 - 284 pM/l: 2nd phase of the menstrual cycle - 439 - 570 pM/l; for postmenopause - 51 - 133 pM/l.

Deviations from the norm of sex hormones may indicate:

diseases of the genital organs;
adrenal neoplasms;
cirrhosis of the liver.

Pituitary hormones

Norm of pituitary hormones:

TSH (thyroid-stimulating hormone)
: 0.4-4.0 mU/l;
FSH (follicle-stimulating hormone)
: 1.37 - 13.58 mU/ml (men), 0.57 - 8.77 mU/ml (women);
LH (luteinizing hormone)
: 1.26 - 10.05 mU/ml (men), 0.61 to 56.6 mU/ml (women);
Prolactin
: 2.58 - 18.12 ng/ml (men), 1.2 - 29.93 ng/ml (women);
ACTH (adrenocorticotropic hormone)
: 9-52 pg/ml.

Deviations from the norm of pituitary hormones may indicate:

pituitary diseases;
dysfunction of the thyroid gland;
stress;
pregnancy and breastfeeding;
other conditions.

Adrenal hormones

Normal levels of adrenal hormones:

DEA-s (dehydroepiandrosterone sulfate)
: 3591-11907 nmol/l (men), 810-8991 nmol/l (women);
Aldosterone
: 35 - 350 pg/ml;
Cortisol
: 3.7-19.4 mcg/dl.

Abnormalities in adrenal hormones may indicate:

adrenal gland diseases;
stress;
hunger;
other conditions.

Hormones when planning pregnancy

Normal hormone levels when planning pregnancy:

FSH (follicle-stimulating hormone)
: 0.57 – 8.77 mU/ml;
LH (luteinizing hormone)
: 1 - 96.0 mIU/ml;
Prolactin
: 64 - 395 mIU/l;
Estradiol
: 57 - 426 ng/l;
Progesterone (pregnancy signaling hormone)
: 0.2 to 1.5 ng/ml;
DEA-sulfate (DEA-s or DEAS)
: 810-8991 nmol/l (women).

Deviations from normal hormones when planning pregnancy may indicate:

pregnancy;
diseases of the genital organs;
other diseases.

When to take it

You need to take a hormonal blood test:

when prescribed by a doctor;
when planning pregnancy;
to control the course of pregnancy;
if you suspect hormonal disorders;
with unreasonable weight gain;
with an enlarged thyroid gland.

Modern methods of treatment

Treatment is necessary in situations where leukocytes in the urine are a sign of pathology.
Most often it is a urinary tract infection caused by bacteria. In this case, antibiotics, plenty of fluid intake, uroseptics and anti-inflammatory drugs, and diet are indicated. If certain developmental defects are detected, operations may be performed to restore the integrity of the urinary tract.

If leukocytes appear against the background of salts or crystals in the urine (nephropathy), a diet and correction of the pH (acidity) of urine through medications and fluid intake are indicated.

Serological blood test

A laboratory blood test that involves the interaction of antibodies and antigens. It is carried out to identify infectious diseases and the stage of the infectious process.

Due date and how to prepare

A hormonal blood test is taken in the morning on an empty stomach from a vein.

Serological blood test methods

To confirm the diagnosis, an antigen corresponding to the suspected disease is added to the blood serum, and if there is a reaction, then there are antibodies to the disease and the patient is sick.
To determine the type of infection, antibodies of the expected type are added to the serum, and if there is a reaction, then there is an infection in the blood that corresponds to the added antibodies.

What is the result of a serological blood test?

The analysis provides an answer to whether there is a suspected infection in the human body.

When to take it

when prescribed by a doctor;
if you suspect a certain infection;
to prescribe the correct treatment.

What to do with low or high leukocytes in children?

If the analysis shows that the child’s white blood cell level is not normal, the first step is to donate blood again. If the result is confirmed, a full examination is necessary to determine the cause of this condition. Treatment will depend on the diagnosis. If the reason is decreased body tone, nervous or physical exhaustion, it is necessary to change your lifestyle so that the leukocytes return to normal. In some cases, medications may be required. If the cause of leukocytosis is a disease, you need to get rid of it. In each specific case, individual treatment will be prescribed.