Sepsis Recognition and Management

The Sepsis-3 consensus (2016) defines sepsis as:

Organ dysfunction is operationalized by an increase in the SOFA (Sequential Organ Failure Assessment) score of ≥ 2 points from baseline, reflecting acute organ failure in at least one system (respiratory, renal, hepatic, cardiovascular, neurological, hematologic).

Key conceptual shift from prior definitions: sepsis is not simply “infection plus SIRS criteria” — it is infection plus organ dysfunction. This reflects the life-threatening nature of the diagnosis.

Septic shock is a subset of sepsis defined by:

• Sepsis criteria met, PLUS
• Vasopressor requirement to maintain MAP ≥ 65 mmHg despite adequate fluid resuscitation, AND
• Serum lactate > 2 mmol/L (> 18 mg/dL)

Septic shock carries in-hospital mortality exceeding 40%. The combination of circulatory failure, cellular metabolic abnormalities, and ongoing organ dysfunction drives the high mortality rate.

Nurses are often the first to detect early sepsis — subtle changes that, in combination, form a pattern of concern:

• Vital sign changes: New fever or hypothermia, tachycardia, tachypnea, hypotension (often a late sign)
• Mental status: New confusion, agitation, or decreased responsiveness in any patient with a known or suspected infection source
• Skin and perfusion: Mottling, prolonged capillary refill, cold extremities, or paradoxically — warm/flushed skin in early sepsis
• Urine output: Oliguria (< 0.5 mL/kg/hr) suggesting renal hypoperfusion
• Elevated lactate: Lab indicator of tissue hypoperfusion even with normal or near-normal BP
• Clinical context: Any patient with a new infection source (pneumonia, UTI, wound, IV line) and the above changes warrants immediate evaluation

Trust the clinical picture. Sepsis can be present before lactate returns or BP drops — escalate early based on assessment findings.

Surviving Sepsis Campaign guidelines recommend a time-sensitive bundle approach. The 1-hour bundle emphasizes initiating all elements as quickly as possible after recognition:

1. Measure lactate. Repeat if initial lactate > 2 mmol/L to assess response. Elevated lactate identifies high-risk patients.
2. Obtain blood cultures before antibiotics. At least two sets from two different sites. Culture collection must not delay antibiotic administration by more than 45 minutes.
3. Administer broad-spectrum antibiotics. Within 1 hour of sepsis recognition. Antibiotic selection is provider-ordered based on suspected source.
4. IV fluid resuscitation. 30 mL/kg crystalloid for sepsis-induced hypoperfusion or septic shock. Reassess response with each fluid bolus.
5. Vasopressors if needed. For MAP < 65 mmHg despite initial fluid resuscitation. Norepinephrine is first-line vasopressor in septic shock.

Bundle elements are initiated concurrently, not sequentially. Time to antibiotics and source control are the two interventions most strongly associated with mortality reduction.

• Recognize and escalate immediately. Do not wait for all criteria to be met — if clinical concern exists, notify the provider now.
• Establish IV access. Two large-bore peripheral IVs or central access. Prepare for rapid fluid administration.
• Obtain specimens efficiently. Blood cultures (before antibiotics), CBC, BMP, lactate, urinalysis — anticipate provider orders and prepare to expedite labs.
• Administer ordered antibiotics promptly. Document administration time. Time to first antibiotic dose is a quality metric.
• Monitor response to fluids and vasopressors. Reassess BP, HR, mental status, UO, and lactate after each intervention.
• Target organ support. Manage respiratory failure (supplemental O₂ or mechanical ventilation as needed), monitor renal function, prevent additional organ dysfunction.
• Source control. Identify and eliminate the infection source — remove infected lines or catheters, notify provider about wound drainage or abscess for drainage consideration.