Sepsis — Hour-1 Bundle & Nursing
Every hour of delayed antibiotic administration in sepsis increases mortality significantly. The Hour-1 Bundle exists because the clock starts at triage — not at the ICU door.
Core Concept
The Surviving Sepsis Campaign Hour-1 Bundle defines five interventions that must begin within one hour of sepsis recognition. First, measure a serum lactate level — if the initial value is greater than 2 mmol/L, remeasure within 2–4 hours to assess clearance. Second, obtain blood cultures before administering antibiotics, but never delay antibiotics to wait for cultures. Third, administer broad-spectrum IV antibiotics. Fourth, begin rapid IV crystalloid infusion — 30 mL/kg for hypotension or lactate ≥4 mmol/L. Normal saline or lactated Ringer's are first-line fluids. Fifth, if the client remains hypotensive during or after fluid resuscitation (MAP <65 mmHg), initiate vasopressors — norepinephrine is the first-line agent. The nurse's role is time-critical: document the exact time of sepsis recognition (time zero), ensure cultures are drawn from two sites, hang antibiotics rapidly, run the fluid bolus using a pressure bag or rapid infuser, and reassess perfusion markers — MAP, urine output (≥0.5 mL/kg/hr), capillary refill, and mental status. Lactate trending downward signals improving tissue perfusion; a rising or static lactate means the current plan is failing.
Watch Out For
Don't confuse the Hour-1 Bundle (intervention protocol) with sepsis screening criteria (recognition tools like qSOFA or SIRS) — screening identifies the problem, the bundle treats it. Students often think fluids must finish in one hour; the requirement is that they begin within one hour. Blood cultures must be drawn before antibiotics but must never delay antibiotic administration — if venous access is difficult, give antibiotics first.
Clinical Pearl
Cultures, then antibiotics, then fluids — but if cultures delay antibiotics by even minutes, skip ahead. Dead patients don't need culture results.
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