Emergencies: Altered Level of Consciousness — Emergency Medicine
Emergency · Clinical Specialties
How it begins
An exhaustive and rigorous analysis of the pathophysiological mechanisms, semiology, multimodal diagnostic approach and critical intervention strategies for the patient with acute impairment of the alert level in the emergency department.
What it covers
- Alteration of the Level of Consciousness
- Anatomy and Physiology of Consciousness
- · The Ascending Reticular Activating System (SARA)
- · Neurotransmission Systems Alert Regulators
- · The Cerebral Cortex and Functional Connectivity Networks
- Definitions and Semiological Classification
- · Qualitative States of Consciousness
- · Clinical Syndromes of Dissociation of Consciousness
- Epidemiology and Initial Approach in Emergencies
- · Global Etiological Distribution
- Pathophysiology of Diffuse Brain Dysfunction and ICH
- · The Monro-Kellie Doctrine
- · Autoregulation and Cerebral Perfusion Pressure (CPP)
- · Types of Cerebral Edema
- Structural Commas vs. Metabolic
- · Mechanisms of Brain Herniation
- · Diffuse Axonal Damage (DAD)
- · Pathophysiology of Metabolic and Toxic Coma
- Ion Channels and Neurotransmission in Coma
- · The Excitotoxic Glutamate Cascade
- · GABAergic hyperstimulation and Neurosteroids
- · The Mitochondrial Energy Failure Hypothesis
- Clinical Evaluation and Severity Scales
- · The Glasgow Coma Scale (GCS) and its Course
- · The FOUR Scale (Full Outline of UnResponsiveness)
- · Respiratory Patterns and Their Injury Location Value
- Neurological Examination of Coma in the Emergency Room
- · 1. Detailed Pupillary Examination
- · 2. Examination of Brain Stem Reflexes
- · 3. Pathological Motor Responses (Postures)
- Etiological Diagnosis and Approach Algorithm
- · Universal Mnemonics: AEIOU-TIPS
- Complementary Tests and Neuroimaging
- · 1. Simple Cranial Computed Tomography (CT)
- · 2. Lumbar Puncture (LP) in Emergencies
- · 3. Electroencephalography (EEG) in Emergencies
- Initial and Life Support (ABCDE) in the Comatose Patient
- · The Golden Rule: Protect the Airway (GCS ≤ 8)
- · Control of Physiological Vital Signs (Avoid Secondary Damage)
- Surgical and Structural Management of Intracranial Hypertension
- · Urgent Medical Strategies for ICP Reduction
- · Indications for Emergency Neurosurgical Intervention
- Directed Treatment of Metabolic and Toxic Causes
- · 1. Severe Hepatic Encephalopathy (Grade III - IV)
- · 2. Uremic Encephalopathy and Cardiorenal Syndrome
- · 3. Diabetic Ketoacidosis (DKA) and Hyperosmolar State (HHS)
- · 4. Specific Antidotes in Acute Poisoning
- Brain Death and Coma Prognosis
- · Definition and Absolute Prerequisites
- · The Clinical Examination of Brain Death
- · Instrumental Confirmation Methods
The complete study guide is in the app
This page summarizes the outline. The full interactive study guide —with high-yield diagrams, clinical tables, and board review cases— can be read inside Epistemis, completely offline and ad-free.
- Subject
- Emergency
- Category
- Clinical Specialties
- Type
- Study Guide
- Sections
- 51
- Reviewed
- 2026-09-05