📖 Sepsis-3 Definitions (2016, Current Standard)
Life-threatening organ dysfunction caused by a dysregulated host response to infection. Operationalised by an acute change in total SOFA score ≥2 points (presumed baseline SOFA = 0 in absence of known prior organ dysfunction).
Subset of sepsis where underlying circulatory and cellular/metabolic abnormalities are profound enough to substantially increase mortality. Defined by: vasopressor requirement to maintain MAP ≥65 mmHg AND serum lactate >2 mmol/L in the absence of hypovolaemia. Hospital mortality >40%.
A pathologic process caused by invasion of normally sterile tissue, fluid, or body cavity by pathogenic micro-organisms. Does NOT require culture positivity — clinical diagnosis is accepted.
📊 SOFA Score — Full Components
Sequential Organ Failure Assessment (SOFA) quantifies organ dysfunction. Each system scored 0–4. Total score ≥2 with suspected infection = sepsis.
| System | Score 0 | Score 1 | Score 2 | Score 3 | Score 4 |
|---|---|---|---|---|---|
| Respiratory PaO₂/FiO₂ mmHg |
≥400 | 300–399 | 200–299 | <200 + vent support | <100 + vent support |
| Coagulation Platelets ×10³/µL |
≥150 | 100–149 | 50–99 | 20–49 | <20 |
| Liver Bilirubin µmol/L |
<20 | 20–32 | 33–101 | 102–204 | >204 |
| Cardiovascular MAP / vasopressors |
MAP ≥70 | MAP 60–69 | Dopa ≤5 or Dobu | Dopa >5 or NAdr/Adr ≤0.1 | Dopa >15 or NAdr/Adr >0.1 |
| CNS GCS |
15 | 13–14 | 10–12 | 6–9 | <6 |
| Renal Creatinine µmol/L or UO |
<110 | 110–170 | 171–299 | 300–440 or UO <0.5 mL/kg/hr | >440 or UO <0.2 mL/kg/hr |
⚡ qSOFA — Bedside Screening Tool
Quick SOFA (qSOFA) is a rapid bedside screening tool for patients outside ICU suspected of infection. Requires no laboratory results.
RR ≥ 22
breaths/min
Altered Mentation
GCS <15 / confusion
SBP ≤ 100
mmHg
📋 Surviving Sepsis Campaign 2021 — Key Updates
- Hour-1 Bundle replaced the previous 3-hour and 6-hour bundles — earlier action is now mandated
- Balanced crystalloids (Hartmann's / Lactated Ringer's) recommended over 0.9% NaCl for initial resuscitation
- Dynamic fluid responsiveness assessment preferred over static measures (CVP) to guide ongoing fluid therapy
- Noradrenaline remains first-line vasopressor; vasopressin or adrenaline added as second-line agents
- Hydrocortisone 200 mg/day recommended when noradrenaline ≥0.25 mcg/kg/min (ADRENAL trial evidence)
- Blood glucose target 7.8–10 mmol/L — avoid hypoglycaemia
- Early initiation of enteral nutrition within 24–48 hours if haemodynamically stable
- Procalcitonin-guided antibiotic de-escalation supported to reduce duration of therapy
- Stress ulcer prophylaxis only for patients with high-risk factors (not universally)
⚠️ Sepsis Mimics — Do Not Miss
⚡ Surviving Sepsis Campaign — Hour-1 Bundle
All five elements should be initiated within 60 minutes of sepsis/septic shock recognition.
Measure Lactate — Re-measure if Initial >2 mmol/L
Lactate is a marker of tissue hypoperfusion. Lactate ≥4 mmol/L mandates immediate 30 mL/kg fluid bolus regardless of blood pressure status.
- Point-of-care (POC) lactate testing preferred — result within 15 min
- Venous lactate acceptable if arterial not feasible (add 0.05–0.2 mmol/L correction)
- Re-measure every 2 hours until lactate <2 mmol/L (lactate clearance goal ≥10%/2hr)
- Document time of initial and repeat measurements
Blood Cultures ×2 Sets BEFORE Antibiotics
Obtain at least 2 sets of blood cultures (aerobic + anaerobic) from 2 separate peripheral venepuncture sites or 1 peripheral + 1 CVC (if CVC indwelling >48 hrs, pair with peripheral).
- Use ANTT (Aseptic Non-Touch Technique) — skin prep with 2% chlorhexidine/70% alcohol
- Allow drying time 30 seconds — do not fan or blow
- Inoculate 8–10 mL per bottle; fill anaerobic bottle first if using one syringe
- Do NOT delay antibiotics >45 min to obtain cultures — if unable, give antibiotics
- Label bottles correctly with date, time, site, set number
- Additional cultures: urine MC&S, sputum, wound swab, drain fluid as clinically indicated
Broad-Spectrum IV Antibiotics Within 1 Hour
Source-directed empirical therapy covering most likely pathogens. Each hour of delay in septic shock = approximately 7% increase in mortality.
- Follow local antibiogram and institution protocol — typically piperacillin-tazobactam or carbapenem ± vancomycin
- Prepare IV antibiotics as priority — flag urgency to pharmacy if required
- Ensure IV access is patent and adequate gauge (16–18G peripheral or CVC)
- Document exact time of first antibiotic dose
- Dose optimisation: consider extended infusion of beta-lactams (PK/PD targets)
- In suspected fungal sepsis (immunocompromised, prolonged ICU): add empirical antifungal
30 mL/kg IV Crystalloid for Hypotension or Lactate ≥4 mmol/L
Administer 30 mL/kg of balanced crystalloid (Hartmann's/Lactated Ringer's preferred over 0.9% NaCl) as rapidly as possible.
- Calculate dose: 70 kg patient = 2,100 mL — initiate within minutes
- Monitor: HR, BP, SpO₂, respiratory rate every 15 min during bolus
- Watch for fluid overload: rising RR, falling SpO₂, new crackles, increasing oedema
- After bolus, reassess fluid responsiveness before further fluid administration
- Use wide-bore cannula (16G or larger); warm fluids if available
- Document all fluid volumes on fluid balance chart
Vasopressors for MAP <65 mmHg Despite Fluid Resuscitation
Noradrenaline first-line. Initiate via central venous catheter (preferred) or large peripheral vein temporarily if CVC not immediately available.
- Target MAP ≥65 mmHg (higher target 70–75 in chronic hypertension)
- Titrate noradrenaline in small increments (0.05–0.1 mcg/kg/min) every 5–10 min
- Insert arterial line for continuous BP monitoring as soon as feasible
- Insert urinary catheter — target urine output ≥0.5 mL/kg/hr
- Document vasopressor dose, MAP, and HR every 15–30 min during initiation
- Prepare vasopressin or adrenaline as backup if noradrenaline dose escalating (>0.25 mcg/kg/min)
✅ Hour-1 Bundle Nursing Checklist
Track bundle completion for your current patient. Progress is saved locally.
💧 Crystalloid Selection
Composition closer to plasma. Avoids hyperchloraemic acidosis. Associated with lower rates of AKI and RRT requirement (SMART, SALT-ED trials).
High chloride load (154 mEq/L vs plasma 103 mEq/L). Large volumes cause hyperchloraemic metabolic acidosis, renal vasoconstriction, increased AKI risk. Reserve for specific indications (e.g., hypochloraemia, TBI).
📊 Fluid Responsiveness Assessment
After initial 30 mL/kg bolus, use dynamic measures to guide further fluid administration. Static measures (CVP, PAWP) are unreliable predictors of fluid responsiveness.
Passive Leg Raise (PLR) Test
Elevate legs to 45° while supine (auto-transfusion of ~250–300 mL). Measure CO or pulse pressure change over 1 minute. Reversible — no fluid given.
- Positive: CO increase ≥10% or PP increase ≥10% = likely fluid responsive
- Requires CO monitoring: oesophageal Doppler, arterial waveform analysis, or echo
- Not valid in: high intra-abdominal pressure, patients in upright position
Pulse Pressure Variation (PPV)
Variation in pulse pressure with mechanical ventilation breath cycle. PPV >13% = fluid responsive.
- Only valid in: fully mechanically ventilated, sinus rhythm, tidal volume ≥8 mL/kg, no spontaneous breaths
- Requires arterial line for continuous waveform analysis
- Not valid in arrhythmias, spontaneous breathing, low tidal volumes, or open chest
Mini Fluid Challenge (100–200 mL over 1 min)
Small volume challenge with immediate CO/PP response measurement. Safer than full 500 mL bolus for assessing responsiveness.
- 10% increase in CO = positive response → give further fluid
- Useful in patients with borderline fluid tolerance
⚠️ Signs of Fluid Overload — Monitor Closely
- Rising respiratory rate, falling SpO₂
- New or worsening bilateral crackles
- Increasing oxygen requirement
- Rising CVP (>12–15 cmH₂O)
- New or worsening pulmonary infiltrates on CXR
- Peripheral pitting oedema, facial/periorbital oedema
- Increasing intra-abdominal pressure (>20 mmHg)
- Worsening renal function
- Positive cumulative fluid balance >10% body weight
- Increasing vasopressor requirement despite fluids
💉 Vasopressor Guide
Noradrenaline (Norepinephrine) — FIRST LINE
Alpha-1 dominant vasopressor. Increases SVR with minimal chronotropy. Titrate to MAP ≥65 mmHg.
- Starting dose: 0.01–0.05 mcg/kg/min; max 0.5–1 mcg/kg/min (doses >0.25 consider adding hydrocortisone)
- Preferred via CVC; peripheral large vein acceptable short-term (ante-cubital or above)
- Monitor: MAP (arterial line), HR, peripheral perfusion, capillary refill
Vasopressin — SECOND LINE (add-on)
Fixed dose: 0.03–0.04 units/min. Non-catecholamine vasopressor. Adds to noradrenaline effect, may allow noradrenaline sparing.
- Do NOT titrate vasopressin dose — fixed-dose addition
- Evidence: VASST trial — benefit in less severe shock (noradrenaline 5–14 mcg/min)
- Avoid in: mesenteric ischaemia, severe CAD without monitoring
Adrenaline (Epinephrine) — THIRD LINE
Alpha + beta effects. Added when MAP target not achieved despite noradrenaline + vasopressin.
- Caution: increases lactate (via beta-2 stimulation of skeletal muscle) — can confound lactate monitoring
- Starting dose: 0.05–0.1 mcg/kg/min, titrate to response
🔍 Source Identification
Identifying and controlling the septic source is as important as antimicrobials. Consider all potential sources systematically.
Common Sources
- Urinary: UTI, pyelonephritis, obstructed ureter, urosepsis (especially in GCC — high incidence)
- Respiratory: Pneumonia (CAP, HAP, VAP), lung abscess, empyema
- Intra-abdominal: Appendicitis, cholangitis, peritonitis, ischaemic bowel, diverticular abscess
- Skin/Soft Tissue: Necrotising fasciitis, cellulitis, infected pressure injuries
- Line-related: CLABSI, infected port, contaminated TPN line
- Endocarditis: Consider in IVDU, prosthetic valves, persistent bacteraemia
- CNS: Meningitis, epidural abscess (especially post-procedure)
Nurse-Led Source Investigations
- Catheter specimen urine (CSU) — if urinary catheter in situ; mid-stream urine (MSU) if not
- Sputum culture — induced or spontaneous in intubated/non-intubated patients
- Wound swab using Levine technique (press and rotate 5-second swab)
- Drain fluid sample — label as drain site, volume, and character
- CVC tip culture (≥15 cm of tip) if removing catheter
- Stool culture — if diarrhoea, recent antibiotics (C. difficile)
- Skin inspection: sacrum, heels, groin folds, IV sites
🔧 Emergency Source Control — Nursing Preparation
Source control (drainage, debridement, device removal) should occur within 6–12 hours of identification. The least invasive approach first.
Abscess Drainage (Bedside or IR)
- IV access ×2 patent, fluid running, vasopressors available
- Sedation/analgesia prepared and checked (propofol, fentanyl, midazolam as ordered)
- Sterile dressing trolley, drain equipment, culture specimen containers ready
- Post-procedure: document drain character/volume hourly, send drain fluid for MC&S
Central Line Removal (CLABSI)
- Peripheral access established before removal — do not leave patient without IV access
- Cut 15 cm of CVC tip aseptically and send for culture (label: CVC tip — right/left side, date)
- New CVC insertion: document indication, site, bundle compliance (maximal barrier)
- Consider PICC or alternative if prolonged IV therapy needed
Emergency Laparotomy Preparation
- Pre-op bloods: FBC, U&E, LFT, coag, group and crossmatch, ABG, lactate
- Consent documented, marked surgical site if applicable
- Bowel prep if time allows; nil by mouth with timing documented
- Haemodynamic stabilisation: MAP ≥65, Hb ≥70 g/L, coagulopathy corrected
- Brief briefing with anaesthetic and surgical team on sepsis severity (SOFA score)
🦠 Antibiotic Stewardship in Sepsis
Initial (Empirical) Phase — 0–48 hrs
- Cover most likely pathogens for suspected source
- Gram-negatives: piperacillin-tazobactam, carbapenems (in high-resistance settings)
- MRSA risk: add vancomycin or linezolid
- Anaerobic cover: metronidazole or inherent in pip-tazo
- Antifungal (echinocandin) if risk factors present
De-escalation Phase — 48–72 hrs
- Review all culture results daily with medical team
- Narrow to narrowest spectrum agent with documented activity
- IV to oral switch when tolerating enteral and clinically improving
- Minimum effective duration: 5–7 days for most uncomplicated sources
- Procalcitonin trend guides cessation (fall ≥80% from peak)
Procalcitonin-Guided De-escalation
- PCT <0.5 ng/mL OR >80% fall from peak → consider discontinuing antibiotics
- PCT falling but >0.5 → continue, reassess in 24–48 hours
- PCT rising or plateau → review clinical picture, consider treatment failure, new source
- PCT less reliable in: immunocompromised, renal failure (impaired clearance)
🍄 Antifungal Therapy — When to Add
Empirical antifungal (echinocandin: caspofungin, micafungin, anidulafungin) should be considered in the following scenarios:
- Immunocompromised (haematological malignancy, solid organ transplant, prolonged steroids)
- Prolonged ICU stay (>5–7 days) with no improvement on antibacterials
- Total parenteral nutrition (TPN) in situ
- Multiple broad-spectrum antibiotic courses
- Recent abdominal surgery (recurrent perforation/anastomotic leak)
- Colonisation with Candida at ≥2 non-contiguous sites
- Positive Candida score or Candida risk score ≥3
- Persistent candidaemia — escalate to fluconazole if susceptible C. albicans
🩸 Sepsis-Induced Coagulopathy (SIC) / DIC
DIC occurs in up to 35% of septic shock. Activation of coagulation cascade leads to consumptive coagulopathy with both thrombosis and haemorrhage.
Monitoring Parameters
- Prothrombin time (PT) / INR — daily
- APTT — daily
- Fibrinogen — daily (fall <1.5 g/L = severe consumption)
- Platelet count — 6–12 hourly if rapidly falling
- D-dimer — markedly elevated in DIC
- FBC with film — schistocytes suggest TMA/DIC
Transfusion Thresholds (Restrictive Strategy)
- RBC: Hb <70 g/L (target 70–90); <80 if active coronary disease
- Platelets: <10 (prophylactic); <50 if active bleeding or invasive procedure
- FFP: Active bleeding + INR >1.5 / APTT >1.5× normal
- Cryoprecipitate: Fibrinogen <1.5 g/L + active bleeding
- Do NOT transfuse to normalise lab values alone — clinical context essential
💊 Corticosteroids in Septic Shock — ADRENAL Trial
Hydrocortisone 200 mg/day (50 mg IV q6h or 200 mg/24hr continuous infusion) when noradrenaline dose ≥0.25 mcg/kg/min persists after adequate resuscitation.
- ADRENAL trial (2018): hydrocortisone reduced duration of shock and ICU LOS; no 90-day mortality benefit
- APROCCHSS trial (2018): hydrocortisone + fludrocortisone reduced 90-day mortality (NNT ≈ 14)
- Monitor glucose closely — steroid-induced hyperglycaemia common; target 7.8–10 mmol/L
- Wean hydrocortisone when vasopressors weaning — do not abruptly stop
- Relative adrenal insufficiency: random cortisol <276 nmol/L or ACTH stimulation test response <250 nmol/L
🩺 Glucose Management
Avoids hypoglycaemia while preventing harm from hyperglycaemia. NICE-SUGAR trial: intensive control (4.5–6 mmol/L) increased mortality.
Monitoring Frequency
- Every 1–2 hours during insulin infusion initiation or dose change
- Every 2–4 hours when stable on established insulin infusion
- Every 4–6 hours for patients on enteral or parenteral nutrition without insulin infusion
- Point-of-care glucometer acceptable; arterial sample if haemodynamically unstable (peripheral capillary unreliable)
🫘 Renal Protection — AKI Prevention
- Maintain MAP ≥65 mmHg — renal perfusion pressure dependent on MAP in sepsis
- Avoid nephrotoxic drugs: NSAIDs, aminoglycosides (single daily dose if unavoidable + drug levels), iodinated contrast (if urgent imaging, ensure adequate hydration)
- Strict fluid balance — avoid both dehydration and fluid overload
- Hourly urine output monitoring via IDC — <0.3 mL/kg/hr for 6+ hours = AKI Stage 3
- Creatinine/eGFR trend monitoring — rise of ≥26.5 µmol/L in 48 hrs = AKI Stage 1
- Review and hold all nephrotoxic medications
Early RRT Criteria
- Refractory hyperkalaemia (K >6.5 mmol/L)
- Metabolic acidosis pH <7.1 refractory to treatment
- Volume overload unresponsive to diuretics with respiratory compromise
- Uraemic encephalopathy, pericarditis, or bleeding
- Creatinine >350–400 µmol/L with oligoanuria — consider early initiation
🛡️ Supportive Care Bundle
Stress Ulcer Prophylaxis
- PPI (pantoprazole 40 mg IV/oral) preferred over H2 blocker in ICU
- Indicate ONLY if high-risk: mechanical ventilation >48 hrs, coagulopathy, prior GI bleed, steroid use, renal replacement therapy
- Discontinue when risk factors resolve or patient fully enterally fed
- H2 blockers (ranitidine) may increase C. difficile risk — use PPI
VTE Prophylaxis
- LMWH (enoxaparin) preferred: weight-adjusted dose, renal dose adjustment if CrCl <30
- Mechanical (TED stockings + pneumatic compression) if anticoagulation contraindicated (active bleeding, thrombocytopaenia <50)
- Review daily — restart pharmacological prophylaxis as soon as safe
Early Enteral Nutrition
- Initiate within 24–48 hours if haemodynamically stable (MAP ≥65 on stable/weaning vasopressors)
- Start low rate (20–25 mL/hr), advance to goal rate over 24–48 hrs
- Monitor gastric residuals if high-risk of aspiration (GCS <8, supine position)
- Post-pyloric feeding if high aspiration risk or intolerance
- Avoid parenteral nutrition in first 7 days if enteral feasible
- Hold enteral nutrition during: prone positioning manoeuvres, active resuscitation with vasopressor escalation, paralytic ileus with vomiting
Sedation Strategy
- ABCDEF bundle: Awaken, Breathe, Choice of sedation, Delirium, Early mobility, Family
- Light sedation target (RASS 0 to -2) unless specific indications for deeper sedation
- Daily sedation holds — document SAT/SBT if mechanically ventilated
🌍 Sepsis in the GCC — Common Sources & Patterns
Leading Sepsis Sources in GCC ICUs
- Urinary tract: Highest incidence in GCC (high catheter use, diabetes prevalence, hot climate dehydration). ESBL E. coli and Klebsiella predominant organisms.
- Respiratory: VAP rates higher in several GCC centres; community-acquired pneumonia common; Mycobacterium TB must be excluded in migrants.
- Intra-abdominal: Perforated peptic ulcer, appendicitis, cholangitis — often late presentations in migrant populations.
- Line-related (CLABSI): High CVC utilisation in GCC ICUs; CLABSI rates improving with bundle implementation.
Community-Acquired Sepsis in Migrants
- Delayed healthcare-seeking — financial, language, insurance barriers common
- TB co-infection: always consider in patients from high-prevalence countries (South Asia, Sub-Saharan Africa). Sputum AFB, IGRA/Mantoux, CXR.
- Melioidosis in patients from Southeast Asia (Burkholderia pseudomallei — endemic Thailand, Malaysia)
- Enteric fever (Typhoid) — Salmonella typhi; blood cultures positive in 50–80% of cases
- Language barriers: use hospital interpreter services — never use family members for consent
🦠 Antibiotic Resistance in GCC
Antimicrobial resistance is a significant and growing concern across GCC healthcare systems, influencing empirical antibiotic selection.
🕌 Ramadan & Sepsis Recognition
- Patients may present late with dehydration masking early sepsis signs (compensated tachycardia)
- Pre-existing chronic diseases (diabetes, CKD) exacerbated — increased infection risk
- Fasting patients: serum lactate and creatinine may be mildly elevated at baseline
- Diabetic patients at risk of hypoglycaemia pre-dawn and hyperglycaemia post-iftar — more frequent BGL monitoring required
- Altered sleep cycles affect nursing assessment patterns — ensure adequate assessment frequency regardless of time of day
- Family presence higher during evening/night — utilise for history, medication reconciliation, discharge education with interpreter
🏥 GCC Sepsis Registries & Awareness Initiatives
👩⚕️ Sepsis Six — Nursing-Led Bundle
The UK Sepsis Trust "Sepsis Six" is a simplified nursing-executable bundle to be completed within 1 hour of sepsis recognition. Widely adopted in GCC nursing practice.
Give (3 actions)
- 🫁 High-flow oxygen — target SpO₂ ≥94% (88–92% if COPD/risk of hypercapnia)
- 💊 IV antibiotics — broad-spectrum per protocol, within 1 hour
- 💧 IV fluid challenge — 500 mL crystalloid stat (or weight-based 30 mL/kg)
Take (3 actions)
- 🩸 Blood cultures — ×2 sets before antibiotics (ANTT)
- 🧪 Lactate & bloods — FBC, U&E, CRP, blood gas, lactate
- 🚽 Urine output — catheterise, measure hourly, target ≥0.5 mL/kg/hr
GCC ICU Nurse Sepsis Competency Framework
- Recognition: qSOFA scoring, SOFA calculation, early warning system triggers (MEWS/NEWS)
- Technical: blood culture ANTT technique, vasopressor preparation and titration, arterial line management
- Assessment: fluid balance, urine output trending, haemodynamic monitoring interpretation
- Communication: structured handover (ISBAR) with sepsis-specific parameters, escalation protocols
- Documentation: bundle timing documentation, medication administration record for antibiotic timing
- Family communication: culturally sensitive explanation in Arabic/English/Urdu as required
✅ Sepsis Six Nursing Checklist
Track Sepsis Six completion. Progress is saved locally.