The significance of biochemical monitoring in clinical practice
Performing a general therapeutic biochemical blood test is a strict recommendation for all patients. This type of laboratory diagnostic is performed both before initiating treatment and directly during therapy. The main objective of such monitoring is to assess the body's baseline parameters, among which urea and creatinine play a crucial role.
As part of the initial patient evaluation and subsequent follow-up, a biochemical blood test serves two key clinical purposes:
- Exclusion of comorbid conditions that may affect patient management tactics.
- Timely detection and exclusion of potential complications arising during therapy.
In addition to creatinine and urea, the mandatory list of parameters for baseline monitoring always includes total protein, albumin, total bilirubin, and key electrolytes—potassium and sodium.
Mandatory parameters of a biochemical blood test
When performing a general therapeutic biochemical blood test, the laboratory evaluates a wide range of parameters. Depending on the clinical situation (initial evaluation or follow-up), the list of mandatory parameters includes:
- Creatinine and urea, as well as uric acid.
- Total protein and albumin, as well as C-reactive protein (CRP).
- Glucose.
- Sodium, potassium, and total calcium.
- Total bilirubin.
- Thyroid-stimulating hormone (TSH).
- Alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), alkaline phosphatase (ALP), and gamma-glutamyl transferase (GGT).
All these parameters are studied together to ensure maximum safety of the ongoing therapy and to obtain a complete picture of health status.
Diagnostic specifics when renal neoplasms are suspected
A specific diagnostic laboratory algorithm is provided for patients with suspected malignant renal neoplasms. In this clinical situation, there is a clear recommendation to perform a comprehensive blood assessment consisting of two main stages for all patients.
The first stage is a complete blood count (CBC). Within this framework, the mandatory parameters evaluated are:
- Total hemoglobin;
- Leukocytes;
- Neutrophils;
- Platelets;
- Erythrocyte sedimentation rate (ESR).
The second stage is a general therapeutic biochemical blood test. When oncological renal pathology is suspected, attention shifts to a strictly defined set of markers. This mandatory panel includes creatinine and urea, as well as total protein, albumin, total bilirubin, potassium, and total calcium.
Interrelation of parameters in laboratory panels
Within diagnostic panels, urea and creatinine are routinely evaluated alongside other biochemical markers. During laboratory diagnostics, the physician analyzes them in combination with uric acid, total protein, and albumin.
Bilirubin, glucose, and electrolyte levels (sodium, potassium) are also included in the mandatory comparison list. For a comprehensive assessment of the condition, enzyme activities are studied in parallel: ALT, AST, alkaline phosphatase, and GGT. All these parameters together ensure complete biochemical monitoring at all stages of patient management, from initial evaluation to follow-up.
To memorize the baseline biochemical panel, use the rule «BEMP»: Proteins (total protein, albumin), Electrolytes (potassium, sodium, calcium), Metabolites (urea, creatinine, glucose), Enzymes (ALT, AST, LDH, ALP).
Class and exam questions
Who is ordered a urea and creatinine test, and when?
According to guidelines, a general therapeutic biochemical blood test evaluating urea and creatinine is performed for all patients before and during therapy, as well as during initial evaluation and follow-up.
Why is biochemical monitoring necessary during follow-up?
The main goal of follow-up monitoring is the timely exclusion of comorbid conditions and potential complications that may arise during patient treatment.
What blood parameters must be checked when a renal neoplasm is suspected?
All patients with such suspected conditions are recommended to undergo a complete blood count (hemoglobin, leukocytes, neutrophils, platelets, ESR) and a biochemical test including creatinine, urea, total protein, albumin, bilirubin, potassium, and calcium.
Which enzymes are included in the mandatory biochemical test along with creatinine?
The mandatory parameters of the general therapeutic test include enzymes such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), alkaline phosphatase (ALP), and gamma-glutamyl transferase (GGT).
What else to study on this topic
- Complete blood count (CBC): hemoglobin, leukocytes, neutrophils, platelets, and ESR.
- The role of enzymes in biochemical testing: ALT, AST, LDH, alkaline phosphatase, and GGT.
- Electrolyte balance: the significance of sodium, potassium, and total calcium during initial evaluation.
- Protein metabolism: total protein, albumin, and C-reactive protein (CRP) as markers of inflammation.
- Pigment metabolism and hormonal status: total bilirubin and thyroid-stimulating hormone (TSH).
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