Core Principles of Therapy
Combating excessive fluid accumulation in the body relies on three main principles. Each addresses specific tasks within the therapeutic framework:
- Etiotropic principle — aims to eliminate the underlying cause of the disease and the conditions contributing to edema formation.
- Pathogenetic principle — aims to block the initiating and subsequent links of the pathological development mechanism.
- Symptomatic principle — serves to eliminate severe symptoms, reactions, and processes that worsen the patient's condition.
Etiotropic Approach
The main objective of this approach is to remove the root cause of the disorder. Without this, any attempts to get rid of fluid accumulation will yield only temporary results.
Examples of Implementation:
- Specific treatment for heart failure.
- Therapy for primary renal diseases.
- Treatment of liver pathologies.
- Detoxification therapy.
Pathogenetic Directions
Pathogenetic therapy targets the mechanisms of edematous fluid formation. Physicians act on several physiological and physical factors simultaneously:
- Normalization of hydrostatic pressure: lowering pressure in the venous bed to reduce fluid filtration from the blood.
- Restoration of oncotic force: correction of plasma protein composition to reliably retain water within the vessels.
- Elimination of the osmotic factor: regulation of electrolyte balance and overall tissue osmolarity.
- Protection of microvessels: strengthening vessel walls to prevent protein and water leakage into the interstitium.
- Combating lymphatic insufficiency: restoring full lymphatic drainage.
Symptomatic Care
When the patient's condition is critical or symptoms pose an immediate threat to life, symptomatic treatment is initiated. Its goal is to alleviate severe manifestations of the disease.
Basic methods:
- Reducing the severity of hypoxia during the development of pulmonary edema.
- Mechanical removal of ascitic fluid in severe heart failure or portal hypertension.
- Aspiration of accumulated fluid from joint cavities in pronounced arthritis.
Briefly: answers to topical questions
Which drug classes are used to normalize hydrostatic pressure in edema?
To normalize effective hydrostatic pressure in edema, therapy aims to lower pressure in the venous bed in order to reduce fluid filtration.
Based on the provided sources, the following groups are indicated to reduce preload, i.e., decrease venous blood return to the heart:
- Venous vasodilators.
- Diuretics.
Which specific drugs achieve the restoration of plasma oncotic force?
To restore the effective oncotic suction force of plasma and retain fluid within the vascular bed, human albumin preparations are directly indicated in the sources.
In the absence of a response to baseline ascites therapy, intravenous administration of human albumin preparations is indicated to correct oncotic pressure.
What procedure is used to mechanically remove ascitic fluid in portal hypertension?
Mechanical removal of ascitic fluid in portal hypertension is performed using therapeutic paracentesis (laparocentesis).
This manipulation is a controlled removal of peritoneal transudate (peritoneal drainage). Laparocentesis is indicated for tense ascites and aims to eliminate complication symptoms, improve renal perfusion, relieve the patient's general condition, and reduce dyspnea.
Which medications are used to protect microvessels and reduce their permeability?
To protect microvessels and reduce the permeability of their walls, medications from the groups of angioprotectors and microcirculation correctors are used.
Such drugs include:
- Etamsylate — accelerates thromboplastin formation, normalizes vascular wall permeability, and improves microcirculation.
- Rutoside — used to normalize vascular wall permeability.
- Ascorbic acid — used to normalize vascular wall permeability.
Angioprotectors reduce vascular wall permeability, normalize metabolic processes in the vessel wall, improve microcirculation, and reduce tissue edema.
E-P-S: Etiotropic (cause) -> Pathogenetic (mechanism) -> Symptomatic (manifestations).
Class and exam questions
How many main principles are distinguished in edema treatment?
Three main principles are distinguished: etiotropic, pathogenetic, and symptomatic.
What is the main goal of etiotropic therapy?
The primary goal is the complete elimination of the cause and conditions contributing to the onset of edema.
What does the normalization of hydrostatic pressure involve according to pathogenesis?
It consists of lowering the pressure in the venous bed to reduce fluid filtration.
What else to study on this topic
- Mechanisms of changes in effective oncotic pressure during hypoproteinemia
- The role of the lymphatic system in interstitial space drainage
- The influence of electrolyte balance on the osmotic factor of edema
- Methods of mechanical fluid removal in ascites and arthritis
- Pathophysiological aspects of acute hypoxia in pulmonary edema
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