Determination of disease by a blood test

Determination of disease by a blood test

| |  Clinical Pathology

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Blood tests are the most informative methods of laboratory diagnosis of many diseases. They are used in virtually all areas of medicine. In addition, experts recommend periodically blood tests to identify the diseases at an early stage, which will allow as soon as possible to begin treatment and avoid serious complications. For a diagnosis of some disease the blood tests are used most often and when you need a blood test for the disease.

1. Common (clinical) blood test is used for the diagnosis of many diseases. With its help the doctor determines the pathology of the hematopoietic system, the presence of inflammatory and infectious processes in the body, the development of allergic reactions.

Diagnosis of any disease is based on the deviation of the main indicators of the general analysis of blood from the norm. The most common deviations of indicators that can be used in a clinical blood test to identify the disease:

  • Reduction of hemoglobin in the blood is almost always is the main symptom of anemia. In turn, anemia is usually caused by deficiency of iron, folic acid, vitamin B12. Also lowered hemoglobin can be at malignant diseases of the hematopoietic system (leukemia). Increased content of hemoglobin in the blood in diabetes mellitus, diabetes insipidus, cardiac and pulmonary insufficiency.
  • Increased white blood cells in the blood indicates the development of quite serious diseases. Primarily, it pyo-inflammatory processes, rheumatic exacerbations, malignant tumors of different localizations. Decrease in white blood cells in the blood there is in diseases of infectious and viral diseases, rheumatism, some types of leukemia.
  • An important indicator is the general analysis of blood the number of platelets. Its increase often is a sign of a development of inflammatory processes of many types of anemia, cancer diseases. Reduced levels of thrombocytes in the blood also indicates the development of pathological processes in the body, such as - hemophilia, bacterial and viral infections, renal vein thrombosis.
  • ESR (erythrocyte sedimentation rate) - an indicator that determined in each analysis. Increasing of this indicator may indicate the presence of inflammation in the body, autoimmune disorders, malignant diseases, intoxications.

2. Biochemical analysis of blood reveals liver disease, kidney disease, disorders of water and salt balance, the development of acute inflammation, rheumatic process, lack of vitamins and minerals in the body. Consider the basic indicators of the biochemical analysis of blood, and what diseases can be diagnosed using them.

  • Total protein. Its increasing in the blood cause the diseases - acute and chronic infections, rheumatic and rheumatoid arthritis, malignancies. Reducing the value of this indicator may indicate the development of liver disease, bowel, pancreas, certain cancers.
  • The content of amylase enzyme in the blood is used in the diagnosis of many diseases. Thus, elevated levels of amylase can be at an acute and chronic pancreatitis, cysts and tumors of the pancreas, cholecystitis, diabetes. Reduction of this enzyme may indicate the development of hepatitis, pancreatic insufficiency.
  • At determination of cholesterol in the biochemical analysis of blood can detect the kidney disease, liver and blood vessels. Cholesterol increases in atherosclerosis, myocardial infarction, coronary heart disease, the pathology of the liver, kidneys and hypothyroidism. Lowering cholesterol levels can be a sign of hyperthyroidism, thalassemia, acute infections, chronic lung diseases.
  • Important diagnostic value in the blood chemistry has a determination of bilirubin. Its increase may be indicative of liver pathologies acute and chronic flow, gallstones, as well as deficiency of vitamin B12 in the body.
  • In determining of renal pathology, skeletal muscle is used biochemical analysis on creatinine. There are an increase of this indicator blood tests for diseases of the thyroid gland (hyperthyroidism), radiation sickness, dehydration.
  • In the diagnosis of disorders of renal excretory function (glomerulonephritis, renal tuberculosis, pyelonephritis) determine the content of urea in the blood. Increased urea can be a symptom of disorders of urine outflow, malignancies, heart failure, acute myocardial infarction, bowel obstruction.
  • Is often defined an indicator of blood biochemistry is the iron content. Its decline may indicate on the development of many pathologies - anemia, chronic and acute infections, diseases of the digestive system, tumor processes. But also the high content of iron in the blood should alert the clinician. This state can be in hemochromatosis, some types of anemia, liver disease, nephritis, acute leukemia.

Blood tests in the diagnosis of the most common diseases

Quite often, the doctor sends the patient's to blood test for the disease of the endocrine system, particularly for sugar (glucose). This study is carried out not only under certain symptoms, but also in the complex of regular examinations of the organism. Diabetes frequently occurs in the early stages oligosymptomatic or asymptomatic, so periodic blood research for glucose is important in the early diagnosis.

Frequent studies of blood are the analyzes on a following groups of hormones:

  • pituitary hormones;
  • thyroid hormones;
  • pancreatic hormones;
  • adrenal hormones;
  • sexual hormones.

Reduction or decrease in the content in the blood of any of the hormones indicates the development of pathological processes in humans.

Quite often to patients prescribed blood tests for diseases, sexually transmitted diseases. These infectious diseases include gonococcal and chlamydial infection, syphilis, chancroid, HIV, HPV infection, trichomoniasis, inguinal infection.

In the diagnosis of blood diseases occupy an important place. However, most often to clarify the diagnosis the doctor prescribes additional inspections. Therefore, to the patient not necessary to interpret the results of its analysis independently.

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