EM · Septic shock in the ED
Septic shock in the emergency department
Septic shock (Sepsis-3): vasopressors to keep MAP ≥65 mmHg plus lactate 2 mmol/L after adequate fluid — hospital mortality 40%. SSC 2021 timed recs: antimicrobials immediately, ideally within 1 h of recognition for possible shock; ≥30 mL/kg crystalloid within the first 3 h (suggestion); norepinephrine first-line to MAP 65 mmHg. Against qSOFA as a single screening tool. Seymour 3-hour bundle OR 1.04/h; fluids not associated.
Checked against its sources on 3 Sept 2026
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- Septic shock is defined by vasopressor-requiring hypotension with a lactate above 2 mmol/L despite adequate fluids — a high-mortality state
- After hypotension, effective antimicrobials in the first hour: 79.9% survival; each subsequent hour over 6 h averaged a 7.6% survival decrease (Kumar). Seymour: 3-hour bundle OR 1.04/h; fluid bolus timing not associated.
- A rising lactate despite resuscitation marks refractory septic shock and the need for escalation
- Fluid must be given with reassessment — the non-responsive patient needs vasopressors, not more crystalloid
- Source control is part of the bundle; an undrained focus will defeat any amount of resuscitation
- A new deterioration in an older patient — a fall, new confusion, or being generally unwell — is sepsis until the lactate proves otherwise
- A Glasgow Coma Scale of 8 or less in septic shock is an airway that must be protected; resuscitate first, then intubate
- A mean arterial pressure held at 65 only on a rising noradrenaline dose, with a static lactate, is not a stable patient — escalate to intensive care
Septic shock is the most severe form of a syndrome that begins with infection and ends, if unrecognised, in multi-organ failure and death. It is among the commonest causes of shock seen in the emergency department, it carries a substantial mortality, and it is one of the few emergencies in which minutes genuinely matter: the speed with which the resuscitation is begun and the antibiotics delivered changes the outcome. The Fellowship-level understanding of septic shock rests on the modern definitions, the pathophysiology of the dysregulated response, and the Surviving Sepsis Campaign 2021 timed recommendations (antimicrobials immediately, ideally within 1 h of recognition; at least 30 mL/kg crystalloid within the first 3 h of resuscitation). [1]
Definitions
Sepsis is defined as a life-threatening organ dysfunction caused by a dysregulated host response to infection, with organ dysfunction operationalised as an acute change in the Sequential Organ Failure Assessment (SOFA) score of two points or more.[2] Septic shock is the subset of sepsis with circulatory and cellular abnormalities substantial enough to markedly increase mortality, defined clinically as sepsis with persisting hypotension requiring vasopressors to maintain a mean arterial pressure of 65 mmHg or more, and a serum lactate above 2 mmol per litre, despite adequate volume resuscitation.[3] This is not a semantic refinement: the patient who meets this definition has a markedly higher mortality than the patient with sepsis alone, and the definition directs the intensity of the resuscitation. SSC 2021 recommends against using qSOFA compared with SIRS, NEWS, or MEWS as a single screening tool for sepsis or septic shock. In the derivation data cited in the guideline rationale, only 24% of infected patients had a qSOFA of 2 or 3, but these patients accounted for 70% of poor outcomes — so a low qSOFA does not exclude sepsis.[1]
References18ShowHide
- [1]Evans L, Rhodes A, Alhazzani W, et al. Surviving sepsis campaign: international guidelines for management of sepsis and septic shock 2021 Intensive Care Med, 2021.PMID 34599691
- [2]Singer M, Deutschman CS, Seymour CW, et al. The Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3) JAMA, 2016.PMID 26903338
- [3]Shankar-Hari M, Phillips GS, Levy ML, et al. Developing a New Definition and Assessing New Clinical Criteria for Septic Shock: For the Third International Consensus Definitions for Sepsis and Septic Shock (Sepsis-3) JAMA, 2016.PMID 26903336
- [4]Seymour CW, Gesten F, Prescott HC, et al. Time to Treatment and Mortality during Mandated Emergency Care for Sepsis N Engl J Med, 2017.PMID 28528569
- [5]Rivers E, Nguyen B, Havstad S, et al. Early goal-directed therapy in the treatment of severe sepsis and septic shock N Engl J Med, 2001.PMID 11794169
- [6]Asfar P, Meziani F, Hamel JF, et al. High versus low blood-pressure target in patients with septic shock N Engl J Med, 2014.PMID 24635770
- [7]Yealy DM, Kellum JA, Huang DT, et al. A randomized trial of protocol-based care for early septic shock N Engl J Med, 2014.PMID 24635773
- [8]Venkatesh B, Finfer S, Cohen J, et al. Adjunctive Glucocorticoid Therapy in Patients with Septic Shock N Engl J Med, 2018.PMID 29347874
- [9]Semler MW, Self WH, Wanderer JP, et al. Balanced Crystalloids versus Saline in Critically Ill Adults N Engl J Med, 2018.PMID 29485925
- [10]Peake SL, Delaney A, Bailey M, et al. Goal-directed resuscitation for patients with early septic shock N Engl J Med, 2014.PMID 25272316
- [11]Mouncey PR, Osborn TM, Power GS, et al. Trial of early, goal-directed resuscitation for septic shock N Engl J Med, 2015.PMID 25776532
- [12]Subbe CP, Kruger M, Rutherford P, Gemmel L. Validation of a modified Early Warning Score in medical admissions QJM, 2001.PMID 11588210
- [13]Cardenas-Garcia J, Schaub KF, Belchikov YG, et al. Safety of peripheral intravenous administration of vasoactive medication J Hosp Med, 2015.PMID 26014852
- [14]Jansen TC, van Bommel J, Schoonderbeek FJ, et al. Early lactate-guided therapy in intensive care unit patients: a multicenter, open-label, randomized controlled trial Am J Respir Crit Care Med, 2010.PMID 20463176
- [15]Kumar A, Roberts D, Wood KE, et al. Duration of hypotension before initiation of effective antimicrobial therapy is the critical determinant of survival in human septic shock Crit Care Med, 2006.PMID 16625125
- [16]Jones AE, Shapiro NI, Trzeciak S, et al. Lactate clearance vs central venous oxygen saturation as goals of early sepsis therapy: a randomized clinical trial JAMA, 2010.PMID 20179283
- [17]De Backer D, Biston P, Devriendt J, et al. Comparison of dopamine and norepinephrine in the treatment of shock N Engl J Med, 2010.PMID 20200382
- [18]Hernández G, Ospina-Tascón GA, Damiani LP, et al. Effect of a Resuscitation Strategy Targeting Peripheral Perfusion Status vs Serum Lactate Levels on 28-Day Mortality Among Patients With Septic Shock: The ANDROMEDA-SHOCK Randomized Clinical Trial JAMA, 2019.PMID 30772908