Unit 1489: Critical Care Medicine

1. Introduction to Critical Care Medicine

• Definition and scope
• Goals of critical care
• Unique challenges in managing critically ill patients
• Specialized interventions and multidisciplinary approach

2. Physiological Principles in Critical Care

2.1 Pathophysiology of Critical Illness

• Systemic inflammatory response
• Organ dysfunction and failure

2.2 Oxygen Delivery and Utilization

• Components of oxygen delivery (DO2)
• Oxygen consumption (VO2)
• Factors affecting oxygen delivery and extraction

2.3 Acid-Base Balance

• Principles of acid-base homeostasis
• Common acid-base disturbances in critical illness
• Interpretation of arterial blood gases

2.4 Hemodynamics

• Cardiac output and its determinants
• Vascular resistance and compliance
• Perfusion pressure and tissue oxygenation

2.5 Organ Dysfunction in Critical Care

• Respiratory, cardiovascular, renal, neurological, hepatic dysfunction

3. Monitoring and Diagnostic Tools in Critical Care

3.1 Hemodynamic Monitoring

• Invasive vs non-invasive methods
• Central venous pressure, arterial pressure, pulmonary artery catheter
• Advanced cardiac output monitoring techniques

3.2 Respiratory Monitoring

• Pulse oximetry, capnography
• Ventilator parameters and waveforms

3.3 Laboratory Tests

• Blood gases, lactate, biomarkers of organ injury
• Electrolytes and metabolic panels

3.4 Imaging Modalities

• Chest X-ray, ultrasound, CT scans
• Role and interpretation in critical care

4. Management of Respiratory Failure in Critical Care

4.1 Etiology and Assessment

• Types of respiratory failure (hypoxemic, hypercapnic)
• Clinical signs and diagnostic evaluation

4.2 Mechanical Ventilation Principles

• Indications and goals
• Modes of ventilation (volume control, pressure control, etc.)
• Ventilator settings and adjustments

4.3 Weaning from Mechanical Ventilation

• Criteria for weaning readiness
• Weaning protocols and spontaneous breathing trials

4.4 Complications of Respiratory Support

• Barotrauma, volutrauma, ventilator-associated pneumonia
• Strategies to minimize complications

5. Hemodynamic Management in Critical Care

5.1 Assessment of Hemodynamic Instability

• Recognition of shock states
• Monitoring parameters and interpretation

5.2 Fluid Resuscitation

• Types of fluids (crystalloids, colloids)
• Indications and goals
• Risks of over- and under-resuscitation

5.3 Vasopressor and Inotrope Therapy

• Common agents (norepinephrine, dopamine, dobutamine)
• Indications, mechanisms, and side effects

5.4 Optimizing Perfusion and Oxygen Delivery

• Balancing oxygen supply and demand
• Use of hemodynamic monitoring to guide therapy

6. Sepsis and Septic Shock Management

6.1 Early Recognition of Sepsis

• Clinical criteria and screening tools

6.2 Initial Resuscitation

• Fluid therapy
• Use of vasopressors

6.3 Antibiotic Therapy

• Timing and selection
• Source control

6.4 Advanced Management

• Corticosteroids
• Supportive care

6.5 Evidence-Based Guidelines

• Current Surviving Sepsis Campaign recommendations

7. Neurological Emergencies in Critical Care

7.1 Traumatic Brain Injury (TBI)

• Assessment and monitoring
• Neuroprotective strategies

7.2 Stroke

• Ischemic and hemorrhagic stroke management
• Critical care considerations

7.3 Seizures and Status Epilepticus

• Recognition and management
• Role of EEG monitoring

7.4 Altered Mental Status

• Differential diagnosis
• Diagnostic and monitoring approaches

8. Renal and Metabolic Support in Critical Care

8.1 Acute Kidney Injury (AKI)

• Causes and diagnosis
• Management principles

8.2 Electrolyte Disturbances

• Common imbalances (potassium, sodium, calcium, magnesium)
• Correction strategies

8.3 Acid-Base Disorders

• Metabolic acidosis/alkalosis
• Respiratory contributions

8.4 Renal Replacement Therapy (RRT)

• Indications and modalities
• Timing and complications

8.5 Nutritional Support

• Enteral vs parenteral nutrition
• Metabolic needs in critical illness

9. Ethical and End-of-Life Considerations in Critical Care

9.1 Ethical Dilemmas

• Beneficence, non-maleficence, autonomy
• Resource allocation

9.2 Communication Challenges

• Discussing prognosis with patients/families
• Delivering bad news

9.3 Decision-Making Processes

• Withholding and withdrawing life-sustaining treatments
• Advance directives and care planning

9.4 Palliative Care in the ICU

• Symptom management
• Support for patients and families