Immediate Resuscitation Targets for Sepsis and Septic Shock
Begin resuscitation immediately with at least 30 mL/kg of intravenous crystalloid within the first 3 hours for any patient with sepsis-induced hypoperfusion (hypotension or lactate ≥4 mmol/L), targeting a mean arterial pressure of 65 mmHg, and initiate norepinephrine as soon as MAP remains below this threshold despite adequate fluid loading. 1, 2
Initial Fluid Resuscitation (First 3 Hours)
Administer a minimum of 30 mL/kg of isotonic crystalloid (normal saline or balanced solution) within the first 3 hours—for a 70 kg adult, this equals approximately 2 liters given as rapid 500–1000 mL boluses over 5–10 minutes. 1, 2
Use crystalloids as first-line therapy; avoid hydroxyethyl starch formulations because they increase acute kidney injury and mortality. 2, 3
Continue fluid challenges while hemodynamic improvement is observed, guided by dynamic indices (pulse-pressure variation, stroke-volume variation) or static variables (arterial pressure, heart rate, urine output). 1, 2
Monitor for fluid overload by assessing jugular venous pressure, respiratory rate, and oxygen saturation; stop fluids when these signs appear to prevent worsening outcomes. 2
Hemodynamic Targets (First 6 Hours)
Mean Arterial Pressure
Target MAP ≥65 mmHg in most adults; this threshold maintains organ autoregulation and prevents pressure-dependent hypoperfusion. 1, 2
For patients with chronic hypertension, aim for MAP 70–85 mmHg because their autoregulatory curve is right-shifted and lower targets may be insufficient. 1, 2
Central Venous Pressure
- Maintain CVP 8–12 mmHg (or 12–15 mmHg if mechanically ventilated) to assess fluid responsiveness. 4, 2
Central Venous Oxygen Saturation
- Achieve ScvO₂ ≥70% (or mixed venous O₂ saturation ≥65%) to confirm adequate tissue oxygen delivery. 4, 2
Urine Output
Lactate Monitoring
Measure serum lactate immediately at sepsis recognition and repeat within 6 hours if initially elevated; use lactate normalization (<2 mmol/L) as a resuscitation endpoint. 1, 2
Target lactate clearance of ≥10% every 2 hours during the first 8 hours of resuscitation. 2
Clinical Perfusion Markers
- Assess capillary refill time (<2 seconds), skin temperature, peripheral pulses, and mental status as additional perfusion endpoints beyond numeric targets. 1, 2
Vasopressor Therapy
Norepinephrine – First-Line Agent
Initiate norepinephrine immediately when MAP remains <65 mmHg after the initial 30 mL/kg fluid bolus; do not delay vasopressors while pursuing excessive fluid resuscitation in severe hypotension. 1, 2
Start at 0.05–0.1 µg/kg/min (approximately 5–10 µg/min for a 70 kg adult) and titrate to maintain MAP ≥65 mmHg. 1, 2
Norepinephrine is superior to dopamine, with an 11% absolute mortality reduction and significantly fewer arrhythmias (53% reduction in supraventricular arrhythmias, 65% reduction in ventricular arrhythmias). 1
Peripheral administration is acceptable initially to avoid delays while central venous access is obtained. 2
Vasopressin – Second-Line Agent
Add vasopressin at a fixed dose of 0.03 units/min when norepinephrine reaches 0.1–0.25 µg/kg/min and MAP remains <65 mmHg. 1, 2
Never use vasopressin as monotherapy; it must always be combined with norepinephrine. 1, 2
Do not exceed 0.03–0.04 units/min except as salvage therapy; higher doses cause cardiac, digital, and splanchnic ischemia without additional hemodynamic benefit. 1, 2
Epinephrine – Third-Line Agent
- Add epinephrine starting at 0.05 µg/kg/min (titrating up to 0.3 µg/kg/min) when MAP cannot be achieved with norepinephrine plus vasopressin. 1, 2
Dobutamine – For Persistent Hypoperfusion
- Add dobutamine 2.5–20 µg/kg/min when MAP is adequate (≥65 mmHg) but signs of tissue hypoperfusion persist (elevated lactate, low urine output, altered mental status, cold extremities), especially when myocardial dysfunction is evident. 1, 2
Antimicrobial Therapy (First Hour)
Administer broad-spectrum intravenous antibiotics within 1 hour of sepsis recognition; each hour of delay decreases survival by approximately 7.6%. 2
Obtain at least two sets of blood cultures (aerobic and anaerobic) before starting antibiotics, but never delay antimicrobials more than 45 minutes to obtain cultures. 2
Cover gram-positive organisms (including MRSA when risk factors exist), gram-negative bacteria (including Pseudomonas in healthcare-associated infections), and anaerobes for intra-abdominal or aspiration sources. 2
Source Control (Within 12 Hours)
Identify or exclude a specific anatomic infection source requiring emergent intervention (abscess, infected device, bowel perforation) within 12 hours of shock onset. 2
Perform definitive source-control procedures (drainage, debridement, removal of infected devices) as soon as medically and logistically feasible; inadequate source control is independently associated with increased mortality. 2
Hemodynamic Monitoring
Place an arterial catheter for continuous blood-pressure monitoring as soon as practical after vasopressor initiation. 1, 2
Do not rely solely on MAP; continuously assess tissue-perfusion markers including serial lactate every 2–6 hours, urine output, mental status, skin perfusion, and capillary refill. 1, 2
Common Pitfalls to Avoid
Do not delay norepinephrine while pursuing aggressive fluid resuscitation in profound hypotension; early vasopressor use is appropriate when diastolic blood pressure is critically low. 1
Do not use dopamine as first-line therapy; it is strongly contraindicated (Grade 1A) due to higher mortality and arrhythmia rates compared with norepinephrine. 1, 2
Do not use low-dose dopamine for renal protection; this is strongly discouraged (Grade 1A) as it provides no benefit and delays appropriate therapy. 1
Do not use phenylephrine as first-line therapy except in three specific scenarios: norepinephrine-induced serious arrhythmias, documented high cardiac output with persistent hypotension, or salvage therapy after failure of all other agents. 1
Do not focus solely on MAP numbers; normal MAP can coexist with severe tissue hypoperfusion ("cold shock"). 2
Do not assume a universal MAP target of 65 mmHg; adjust upward for chronic hypertension and consider the patient's baseline blood pressure. 1, 2