Sepsis Quiz

Understanding Sepsis: Key Concepts for Healthcare Professionals

Sepsis is a life-threatening organ dysfunction caused by a dysregulated host response to infection. Rapid identification and management are critical to improving patient outcomes. This guide covers essential knowledge for students and clinicians.

The Sepsis-3 Definition

The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3) redefined the condition. Key changes include:

• Sepsis is now defined as “life-threatening organ dysfunction caused by a dysregulated host response to infection.”
• Systemic Inflammatory Response Syndrome (SIRS) criteria are no longer central to the definition, as they lack specificity.
• Organ dysfunction is identified by an acute change in the total Sequential Organ Failure Assessment (SOFA) score of ≥2 points consequent to the infection.

Screening and Diagnosis: qSOFA and SOFA

For rapid bedside screening of patients with suspected infection outside of the ICU, the quick SOFA (qSOFA) score is recommended.

• Respiratory rate: ≥ 22/min
• Altered mentation: Glasgow Coma Scale < 15
• Systolic blood pressure: ≤ 100 mm Hg

A qSOFA score of ≥2 suggests a higher risk of poor outcomes. For patients who screen positive, a full SOFA score assessment is warranted to confirm organ dysfunction.

Defining Septic Shock

Septic shock is a subset of sepsis in which underlying circulatory and cellular/metabolic abnormalities are profound enough to substantially increase mortality. It is clinically identified by:

• Persistent hypotension requiring vasopressors to maintain a mean arterial pressure (MAP) of ≥65 mm Hg.
• A serum lactate level >2 mmol/L (18 mg/dL) despite adequate volume resuscitation.

The Hour-1 Bundle

The Surviving Sepsis Campaign recommends the “Hour-1 Bundle” of care for patients with sepsis and septic shock. The key elements to be initiated immediately are:

• Measure lactate level (and remeasure if initial lactate is elevated >2 mmol/L).
• Obtain blood cultures before administering antibiotics.
• Administer broad-spectrum antibiotics.
• Begin rapid administration of 30 mL/kg crystalloid for hypotension or lactate ≥4 mmol/L.
• Apply vasopressors if hypotensive during or after fluid resuscitation to maintain a MAP ≥65 mm Hg.

Source Control

Identifying and controlling the source of the infection is a cornerstone of sepsis management. This may involve draining an abscess, removing an infected catheter, or surgical debridement of infected tissue. This should be done as soon as medically and logistically practical after initial resuscitation.

Lactate as a Biomarker

Elevated serum lactate is a key indicator of tissue hypoperfusion. It is not only used for diagnosis but also for monitoring the response to resuscitation. A decreasing lactate level (“lactate clearance”) is a sign of improving perfusion and is associated with better outcomes.

This information is intended for educational review and does not substitute for clinical guidelines or professional medical advice.