Log in
Pathophysiology · Chapter 20. Extreme and Terminal States

Therapy of Extreme States

Extreme states (ES) are critical, life-threatening situations in which adaptation mechanisms are depleted. Therapy for such conditions requires an immediate reaction and a clear understanding of emergency care algorithms. All therapeutic interventions are strictly based on four core principles: etiotropic, pathogenetic, sanogenetic, and symptomatic. Only simultaneous action on the cause, mechanisms of development, defense mechanisms, and distressing manifestations can save the patient's life.

Etiotropic principleAims at completely stopping or reducing the intensity of the causes of the extreme state.
Pathogenetic principleEnsures the blocking of key links in pathogenesis and the breaking of vicious circles of the disease.
Sanogenetic principleConsists in the potent activation of adaptive mechanisms: defense, compensation, and restitution.
Specific therapyIn extreme states caused by poisoning, the administration of antidotes is mandatory.
4 min readFor medical studentsUpdated 09/24/2026
Material prepared by WhiteCoat Pro editorial team based on platform study guidesReviewed by medical editor: Aulov A. A., general practitioner · 09/24/2026

Etiotropic therapy: elimination of the root cause

Any extreme state is triggered by a specific trigger. The etiotropic principle of treatment sets as its main goal the complete cessation or, if that is impossible, the maximum reduction in the strength and scale of the causes that caused this catastrophe.

Therapy should aim at eliminating two groups of factors:

  • Exogenous (external) factors. These include environmental influences, trauma, infections, or chemicals that disrupt homeostasis from the outside.
  • Endogenous (internal) factors. These are pathological processes within the body itself, such as massive hemorrhages or the release of toxic tissue breakdown products.

Without reliable elimination of the cause, all other therapeutic measures will be only temporary.

Pathogenetic treatment: breaking vicious circles

While etiotropic therapy fights the cause, pathogenetic treatment targets the mechanisms of pathology development. Its main goal is to block key links in the pathogenesis of the extreme state. The choice of specific methods always depends on the type of emergency condition.

The most important task of this stage is to implement measures to break the vicious circles of the disease — situations where the consequence of the pathological process itself becomes the cause of its further aggravation.

The main goals of pathogenetic therapy include:

  • Elimination of circulatory disorders.
  • Restoration of adequate external respiration.
  • Elimination of hypoxia, as well as ion and fluid imbalance.
  • Normalization of blood gas composition and acid-base balance (ABB).
  • Elimination of organ and tissue function insufficiency.
  • Administration of antidotes (specific blocking of poisons in poisoning).
Test your knowledge on this topicTasks from the "Pathophysiology" course bank — instant answers and explanations.

Sanogenetic therapy: mobilization of reserves

The human body possesses powerful resources for survival. The goal of sanogenetic therapy is to activate and potentiate the patient's own adaptive mechanisms. These include reactions of defense, compensation, adaptation, and restitution of damaged structures and functions.

Effective sanogenetic support is provided by:

  • Direct stimulation of the functions of vital organs and tissues (primarily the heart, lungs, kidneys, and liver).
  • Activation of repair processes and natural detoxification systems.
  • Elimination of excess oxygen and lipid radicals, which are massively formed in critical conditions.
  • Potentiation of plastic reactions necessary for the restoration of cellular structures.

Symptomatic treatment: relief of distressing manifestations

The essence of symptomatic treatment in extreme states is the elimination of unpleasant, distressing symptoms and sensations. At first glance, they may seem secondary, but in reality, they greatly aggravate the patient's condition and exhaust their nervous system.

Main targets of symptomatic therapy:

  • Intense headache.
  • Excruciating sense of impending death.
  • Causalgia — extremely intense, burning pain occurring upon damage to nerve structures.
  • Dangerous vascular reactions: hypotensive (critical drop in pressure) or hypertensive (sharp pressure spikes) episodes.

Briefly: answers to topical questions

What examples of vicious circles exist in shock or other extreme states?

In extreme states, various vicious circles (Circulus vitiosus) arise, which potentiate disorders. Key examples include:

  • Blood flow disturbance — pooling of blood in vessels reduces venous return and cardiac output, leading to an even greater drop in circulating blood volume.
  • Heat stroke — temperature elevation increases neuromuscular excitability, causes convulsions, and enhances thermogenesis, leading to a further rise in temperature.
  • Sepsis — the concentration of toxins impairs the detoxifying function of the liver, progressing intoxication.
  • Shock — metabolic acidosis and vasoactive metabolites aggravate microvascular paresis, promoting the formation of microthrombi.
  • Ventricular arrhythmia — a painful shock discharge increases sympathetic tone, provoking repeated episodes of arrhythmia.

What specific antidotes are used in organophosphate poisoning as part of pathogenetic therapy?

In organophosphate poisoning as part of specific antidote therapy, drugs aimed at enzyme reactivation are used. The following are used as antidotes:

  • Cholinesterase reactivators — restore the activity of suppressed enzymes in poisoning.

Additionally, it is noted that the mechanism of action of organophosphates is opposite to the effects of atropine, which serves as an example of pharmacological antagonism to acetylcholine.

How to memorize

For quick memorization of the four principles of extreme state therapy, use the "EPSS" rule: Etiotropic (remove the cause), Pathogenetic (break vicious circles), Sanogenetic (stimulate defense), Symptomatic (relieve suffering).

Class and exam questions

What is the fundamental difference between pathogenetic and sanogenetic therapy?

Pathogenetic therapy aims to suppress and block the mechanisms of disease development (e.g., breaking vicious circles). Sanogenetic therapy, conversely, stimulates and potentiates the body's own defense, compensatory, and regenerative forces.

Why is it so crucial to combat the fear of death in extreme conditions?

The fear of death is an extremely distressing symptom that triggers a powerful stress response. This leads to exhaustion of the nervous system, inadequate vascular reactions, and aggravates the patient's overall extreme condition.

What specific adaptive mechanisms are activated during sanogenetic treatment?

Sanogenetic therapy aims to activate four main groups of mechanisms: defense reactions, compensation of lost functions, adaptation to new conditions, and restitution of damaged structures.

Something unclear? Ask the AIThe AI tutor has reviewed the material on "Therapy of Extreme States" and will explain it in simple terms.

What else to study on this topic

  • Mechanisms of vicious circle formation in various types of shock
  • Pathophysiology of hypoxia and methods for normalizing blood gas composition
  • The role of oxygen and lipid radicals in cell membrane damage
  • Acid-base balance (ABB) disorders and principles of their correction
  • Mechanisms of causalgia development and modern approaches to pain management

Master the entire topic in the "Pathophysiology" course

This is a summary. The course covers everything tested in classes and exams.

  • Complete study guide on "Therapy of Extreme States" and another 4,913 pages of the subject
  • Assignments and quizzes after every topic — just like in a colloquium
  • AI tutor answers questions on the topic anytime
  • 135 video lessons on the subject

Other topics in "Chapter 20. Extreme and Terminal States"

The entire section "Chapter 20. Extreme and Terminal States"

Free video lessons: pathophysiologyShort lessons with lecture notes — no registration required.

Watch lessons

Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.