SSC 2026 sepsis recognition and resuscitation: rapid infection-likelihood assessment, timely antimicrobials, individualized initial crystalloids, early norepinephrine, serial perfusion reassessment, and source control.
Sepsis is defined as life-threatening organ dysfunction caused by a dysregulated host response to infection. When accompanied by refractory cellular/metabolic abnormalities and profound vasodilation requiring vasopressors to maintain MAP ≥ 65 mmHg with serum lactate > 2.0 mmol/L despite fluid resuscitation, it is designated Septic Shock (hospital mortality > 40%). Bedside resuscitation should begin immediately, but SSC 2026 uses an infection-likelihood and shock-based timing framework rather than a universal 1-hour bundle for every patient.
Caution
Dangerous Diagnosis Not to Miss: Fulminant Septic Shock with rapid vasoplegic collapse, Purpura Fulminans / Sepsis-Induced DIC (microvascular digital and cutaneous necrosis), Necrotizing Fasciitis, and Concealed Abscess (retroperitoneal/intra-abdominal) requiring emergent surgical debridement.
Early sepsis without shock: confirm probability, treat fast, avoid reflex bundles
Sepsis care should be fast when probability is high, but possible sepsis without shock requires rapid diagnostic discrimination—not indiscriminate antibiotics and fixed-volume resuscitation.
SOFA Score (Sequential Organ Failure Assessment): Acute rise of ≥ 2 points in total SOFA score identifies sepsis-induced organ dysfunction across 6 organ systems:
Screening vs Diagnosis: Sepsis remains a clinical diagnosis. SSC 2026 recommends NEWS/NEWS2, MEWS, or SIRS over qSOFA when a single inpatient screening tool is used. qSOFA (altered mentation, RR >=22, SBP <=100) can identify higher-risk patients but should not be used alone to rule sepsis in or out.
Perfusion: Measure lactate when sepsis/septic shock is suspected and trend it when elevated; use capillary refill time as an adjunct. Do not give repeated fluids solely to normalize lactate.
Cultures: Obtain blood cultures as soon as possible and ideally before antimicrobials when doing so does not create a clinically important treatment delay.
Antimicrobials: Septic shock or probable/definite sepsis -> administer immediately, ideally within 1 hour. Possible sepsis without shock -> rapid diagnostic assessment; if infection concern persists, administer within 3 hours.
Initial Fluids: For sepsis-induced hypoperfusion/septic shock, SSC suggests at least 30 mL/kg IV crystalloid during the first 3 hours, with frequent reassessment and individualization. Balanced crystalloids are generally suggested over saline; use saline when sepsis coexists with traumatic brain injury.
Vasopressors: Norepinephrine is first line. In unstable shock it may be started concurrently with initial fluids; peripheral initiation is acceptable rather than delaying for central access. Initial MAP target is about 65 mmHg (SSC suggests 60–65 mmHg in adults >=65 years).
Pulmonary (50% of sepsis cases): Pneumonia, severe VAP, aspiration, empyema.
Abdominal (20–25%): Peritonitis, perforated diverticulum, cholangitis, acute cholecystitis, mesenteric ischemia, anastomotic leak, acute pancreatitis with infected necrosis.
Urinary Tract (10–15%): Urosepsis, pyelonephritis, obstructive stone with infected hydronephrosis.
Skin & Soft Tissue: Necrotizing fasciitis, severe cellulitis, infected decubitus ulcers, surgical site infection.
Catheter & Implanted Devices: Central line infection, prosthetic valve endocarditis, cardiac device infection.
Central Nervous System: Bacterial meningitis, brain abscess, ventriculitis.
Caution
Common Diagnostic Trap: Delaying norepinephrine until an arbitrary fluid volume is completed in a patient with unstable septic shock. SSC 2026 allows immediate concurrent vasopressor plus crystalloid resuscitation on a case-by-case basis and supports peripheral norepinephrine initiation rather than delaying for central access; continue frequent reassessment to avoid both under- and over-resuscitation.
Sepsis: Pathogenesis, immune dysregulation, and diagnostic criteria.
Septic Shock: SSC guidelines, vasopressor algorithms, and fluid stewardship.
Shock: Hemodynamic monitoring and microcirculatory perfusion endpoints.
Vasopressors & Inotropes: Receptor profiles, Vasopressin kinetics, and Angiotensin II.
DIC: Sepsis-induced coagulopathy (SIC) scoring and microvascular thrombosis.
Antimicrobial Stewardship: PK/PD beta-lactam optimization and de-escalation.
Evidence status
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From recognizing hypoperfusion and initial crystalloid bolus to dynamic fluid responsiveness assessment and vasopressor targets.
From first-line norepinephrine titration to multi-agent vasopressor escalation and inotrope selection.
From multi-vasopressor failure to rescue non-adrenergic agents and mechanical circulatory support.
From confirming true hypotension to recognizing shock and its likely category.
Life-threatening organ dysfunction caused by a dysregulated host response to infection — recognized by an acute rise in SOFA score, not by infection plus fever alone.
The subset of sepsis with profound circulatory and cellular/metabolic abnormality — clinically identified by a vasopressor requirement to maintain MAP ≥ 65 mmHg plus lactate > 2 mmol/L despite adequate fluid resuscitation.
Cellular dysoxia, DO2/VO2 physiology, the 4 shock phenotypes, dynamic fluid responsiveness (PLR/PPV) vs fluid tolerance (VExUS), and vasoactive pharmacology.
Tissue-factor-driven coagulation activation, antithrombin/protein C depletion, PAI-1-associated fibrinolytic suppression, ISTH 2025 DIC assessment, comparison with TTP/HUS/HIT, and targeted replacement.
Molecular resistance mechanisms (ESBL, AmpC, KPC, NDM, OXA-48, DTR-Pseudomonas, CRAB), the MERINO trial, and modern novel beta-lactamase inhibitor therapeutics.