What are the SSC Hour-1 bundle elements?

Within 1 hour: (1) measure lactate; (2) blood cultures before antibiotics; (3) broad-spectrum antibiotics; (4) 30 mL/kg crystalloid for hypotension or lactate ≥4 mmol/L; (5) vasopressors if hypotensive during/after fluids to target MAP ≥65 mmHg.

Does every 1-hour antibiotic delay worsen sepsis mortality?

Meta-analyses show each 1-hour delay in antibiotic administration increases sepsis mortality by 4-9%; 3-hour delay roughly doubles mortality risk; critically ill septic shock patients benefit most from ultra-early antibiotics; evidence is observational with some confounding.

What blood culture volumes are required for reliability?

2 sets (aerobic + anaerobic) per culture set; 8-10 mL per bottle (40-80 mL total for 2 sets); yield falls below 95% sensitivity with smaller volumes; skin decontamination with chlorhexidine essential; should NOT delay antibiotics >45 minutes.

What empirical antibiotic regimen covers sepsis of unknown source?

Unknown source, no recent antibiotics: pip-tazo + gentamicin OR carbapenem (for severe sepsis/immunocompromised); Gram-positive source suspected (SSTI, line infection): add vancomycin; intra-abdominal: metronidazole added; de-escalate at 48-72h when cultures available.

When should antibiotics be de-escalated in sepsis?

De-escalation within 48-72h when cultures positive (narrow spectrum); stop if cultures negative + clinical improvement at 48-72h (CRP falling, fever resolving, hemodynamically stable); PCT-guided de-escalation reduces antibiotic duration without increasing mortality.

Sepsis Hour-1 Bundle Compliance and Surviving Sepsis Calculator

Checks SSC Hour-1 bundle compliance (blood cultures, lactate, antibiotics, fluids, vasopressors), calculates antibiotic time-to-administration delay penalty, and guides empirical antibiotic selection by suspected source.

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Frequently Asked Questions

What are the SSC Hour-1 bundle elements?

Does every 1-hour antibiotic delay worsen sepsis mortality?

What blood culture volumes are required for reliability?

What empirical antibiotic regimen covers sepsis of unknown source?

When should antibiotics be de-escalated in sepsis?