What is a biochemical blood analysis and why is it needed?
A biochemical blood analysis is a laboratory test that allows for the assessment of internal organ function, metabolism, and the detection of various pathologies at early stages. It provides valuable information about the concentration of various substances in the blood, such as proteins, enzymes, glucose, lipids, electrolytes, and metabolic products. The results of this analysis help doctors make an accurate diagnosis, monitor the effectiveness of treatment, and evaluate the patient's overall health status.
Key indicators of biochemical analysis and their significance
A standard biochemical analysis includes a number of key indicators, each of which reflects a specific aspect of the body's functioning. Let's consider the most important ones:
- Indicators of carbohydrate metabolism:
- Glucose: The main source of energy for cells. An elevated level may indicate prediabetes or type 2 diabetes mellitus, which is characterized by insulin resistance and beta-cell dysfunction [7].
- Glycated hemoglobin (HbA1c): Reflects the average blood glucose level over the past 2-3 months. It is used for the diagnosis and monitoring of diabetes mellitus [7].
- C-peptide: Allows for the assessment of endogenous insulin production by the pancreas [7].
- Lipid profile:
- Total cholesterol, LDL (bad cholesterol), HDL (good cholesterol), triglycerides: These indicators are important for assessing the risk of developing atherosclerosis and cardiovascular diseases. Lipid profile abnormalities are often observed in patients with prediabetes and type 2 diabetes mellitus [7].
- Indicators of kidney function:
- Urea and creatinine: Products of protein metabolism that are excreted by the kidneys. Their elevated levels may indicate impaired kidney function [7].
- Indicators of liver function:
The liver plays a central role in metabolism, detoxification, and the synthesis of many important substances. Although specific diagnostic liver markers were not described in detail in all provided sources, it is well known that the following indicators are used to assess its condition:
- Alanine aminotransferase (ALT) and Aspartate aminotransferase (AST): Enzymes that are contained in large quantities in liver cells. Their increase in the blood often indicates hepatocyte damage.
- Alkaline phosphatase (ALP) and Gamma-glutamyl transferase (GGT): May indicate problems with the bile ducts or other liver diseases.
- Bilirubin (total, direct, indirect): A product of hemoglobin breakdown. An increase in its level may indicate impaired liver or bile duct function.
- Indicators of protein metabolism:
- Total protein and albumin: Reflect the synthetic function of the liver and the state of protein metabolism in the body. Changes may indicate liver or kidney diseases, nutritional deficiencies, or inflammatory processes.
- Erythrocyte parameters:
- Hemoglobin and hematocrit: Hemoglobin is the protein that carries oxygen, and hematocrit is the percentage of the total blood volume occupied by red blood cells. These indicators are critical for diagnosing anemia or polycythemia, as well as for assessing the general state of erythrocytes [4].
Specific biomarkers: new horizons in diagnostics
In addition to standard indicators, modern medicine actively uses and researches more specific biomarkers that help in the diagnosis and monitoring of specific diseases:
- Cardiovascular markers:
- NT-proBNP (N-terminal pro-B-type natriuretic peptide), high-sensitivity troponin T (hs-TnT), GDF-15 (growth differentiation factor 15), high-sensitivity C-reactive protein (hs-CRP), and cystatin-C: These markers may be weakly correlated with clinical signs of heart failure, such as edema, jugular venous distension, and orthopnea [1].
- Brain natriuretic peptide (BNP) and troponin I: Used to assess myocardial damage [6].
- Amino acids: Certain amino acids, such as phenylalanine, tyrosine, glycine, alanine, histidine, glutamine, as well as branched-chain amino acids (BCAAs, including valine, isoleucine, and leucine), may be associated with 28-day mortality in ST-elevation myocardial infarction [2].
- Galectin-3: Associated with fibrosis and atrial remodeling, which may indicate a risk of developing atrial fibrillation [6].
- Inflammation markers:
- High-sensitivity C-reactive protein (hs-CRP): Is a general marker of inflammation in the body and may be associated with cardiovascular diseases [1].
- Markers for migraine diagnosis:
- Calcitonin gene-related peptide (CGRP) and pituitary adenylate cyclase-activating polypeptide (PACAP): Are being investigated as potential biomarkers for more accurate and differential diagnosis of migraine [3].
- Thyroid markers:
Although blood tests for hormones (TSH, T3, T4) are traditionally used to assess thyroid function, research shows the potential for using salivary biomarkers for non-invasive diagnosis and monitoring of thyroid diseases [5].
- Molecular markers in diabetes:
- MicroRNA (e.g., miRNA-126 and miRNA-132): Are being investigated as potential molecular markers to improve risk stratification in patients with prediabetes and type 2 diabetes mellitus [7].
Preparation for the analysis and interpretation of results
To obtain the most accurate results from a biochemical blood analysis, it is important to follow preparation rules. This usually includes fasting for 8-12 hours before the blood draw, avoiding alcohol and intense physical exertion for 24 hours prior to the test. You should also inform your doctor about all medications you are taking.
The interpretation of biochemical analysis results is a complex process that requires deep medical knowledge. Deviations from the norm can be caused by a multitude of reasons, from temporary physiological changes to serious diseases. Only a qualified doctor can correctly evaluate all indicators in combination, taking into account the patient's medical history, symptoms, and the results of other examinations. Self-diagnosis and self-treatment based on test results can be dangerous to your health.
Sources
- [1] Biomarkers in outpatient heart failure management; Are they correlated to and do they influence clinical judgment? https://pubmed.ncbi.nlm.nih.gov/24338787/
- [2] Plasma amino acid concentrations at admission and 28-day mortality in ST-elevation myocardial infarction. https://pubmed.ncbi.nlm.nih.gov/42163366/
- [3] A Review of the Biochemical Diagnostic Biomarkers in Migraine: New Perspectives in Diagnostics. https://pubmed.ncbi.nlm.nih.gov/41496770/
- [4] Hemoglobin/hematocrit and other erythrocyte parameters. https://pubmed.ncbi.nlm.nih.gov/3512242/
- [5] Salivary Biomarkers for Diagnosis and Monitoring of Thyroid Diseases: A Systematic Review of Current Evidence. https://pubmed.ncbi.nlm.nih.gov/42318276/
- [6] Blood biomarkers and atrial remodeling in patients at risk of atrial fibrillation. https://pubmed.ncbi.nlm.nih.gov/42256339/
- [7] Biochemical and Molecular Markers Among Prediabetic and Type 2 Diabetes Mellitus Patients. https://pubmed.ncbi.nlm.nih.gov/42502734/
Disclaimer: The information presented in this article is for reference purposes only and cannot replace professional consultation, diagnosis, or treatment provided by a qualified medical professional. Always consult a doctor for medical assistance and recommendations based on your individual health condition.