Figure Aggressive fluids harm (WATERFALL) — drain first and delay intervention for four weeks (PANTER). Severe acute pancreatitis = organ failure >48h (Revised Atlanta). Early phase (week 1) : SIRS + fluid sequestration → GOAL-DIRECTED fluids (WATERFALL — aggressive fluids HARM), analgesia, EARLY enteral nutrition (within 48h), NO prophylactic antibiotics (no benefit). Late phase (week 2+) : necrosis (sterile vs infected). Infected necrosis (30%): antibiotics + STEP-UP approach (PANTER trial — percutaneous/endoscopic DRAINAGE first, then minimally-invasive necrosectomy if needed — superior to open). DELAY intervention 4 weeks (let necrosis wall off → safer drainage). Mortality: 15-30% (severe); lower with step-up + delayed intervention.
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Worked viva questions (CICM / FFICM Second Part style)
SAQ — Severity assessment and early ICU management of severe acute pancreatitis 10 minutes · 10 marks
Reveal all A 58-year-old man with a background of heavy alcohol use (80 g/day) and gallstones presents with 12 hours of severe epigastric pain radiating to the back, vomiting and oliguria. On examination: HR 124, BP 88/50 (MAP 63), RR 28, SpO₂ 90% room air, temperature 38.4 °C. He is drowsy but rousable. Abdomen is distended with guarding and absent bowel sounds. Venous gas: pH 7.28, lactate 3.6 mmol/L, base excess −7. Bloods: amylase 1240, WCC 19.2, haematocrit 0.52, urea 12.4 mmol/L, creatinine 195 µmol/L, albumin 28, calcium 1.92 mmol/L, glucose 11.8 mmol/L, CRP 210. Chest X-ray: small bilateral pleural effusions. He is intubated for respiratory failure and admitted to ICU.
a Apply the Revised Atlanta classification and the Ranson and APACHE II criteria to this patient. How severe is his pancreatitis, and what does each score tell you? (5 marks)
b Outline your fluid resuscitation strategy over the first 24 hours, citing the relevant trial evidence. (3 marks)
c What role do prophylactic antibiotics and early nutrition play in this patient? (2 marks)
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SAQ — Infected pancreatic necrosis and the PANTER step-up approach 10 minutes · 10 marks
Reveal all Three weeks into his ICU admission for severe necrotising pancreatitis, a 58-year-old man has new-onset fever (39.1 °C), increasing vasopressor requirement (noradrenaline up from 0.15 to 0.45 mcg/kg/min) and a rising lactate (1.8 to 3.9 mmol/L). CRP has risen from 110 to 280 mg/L. Contrast-enhanced CT shows >50% pancreatic necrosis with new gas bubbles within the necrotic collection, now partially encapsulated. He is on enteral nutrition via NG and has been on no antibiotics.
a What is the diagnosis, and what is your immediate antibiotic and source-control strategy? Justify with the relevant trial evidence. (5 marks)
b Describe the sequence of the minimally invasive step-up approach, and when open necrosectomy remains appropriate. (3 marks)
c What long-term complications should you anticipate and screen for after recovery? (2 marks)
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Clinical pearls
High-yield severe pancreatitis points for CICM/FFICM exam
Revised Atlanta classification — severity. (1) MILD (80%): no organ failure, no local complications (necrosis, pseudocyst, fluid collection). Usually ward, short stay. (2) MODERATELY SEVERE (15%): local complications OR transient organ failure (<48h). ICU or HDU. (3) SEVERE (5%): persistent organ failure >48h (respiratory, cardiovascular, renal — one or more). ICU — mortality 15-30%. (4) ORGAN FAILURE (Marshall score or SOFA): respiratory (PaO2/FiO2 <300), cardiovascular (SBP <90 despite fluids), renal (creatinine >170). (5) PERSISTENT (>48h) = severe (vs transient = moderately severe). (6) LOCAL COMPLICATIONS: peripancreatic fluid collection (acute), pancreatic necrosis (sterile/infected), pseudocyst (after 4 weeks), walled-off necrosis (after 4 weeks).[1] WATERFALL trial — aggressive fluids HARM. (1) OLD PRACTICE: aggressive fluid resuscitation (10-15 mL/kg bolus + high maintenance) — thought to prevent haemoconcentration + pancreatic necrosis. (2) WATERFALL (2022, NEJM, de Madaria): RCT — AGGRESSIVE (bolus 20 mL/kg + 3 mL/kg/hr x 72h) vs MODERATE (1.5 mL/kg/hr — goal-directed). RESULT: (a) AGGRESSIVE had MORE FLUID OVERLOAD (pulmonary oedema — 20% vs 6%). (b) TREND to MORE DEATHS in aggressive (not statistically significant — but concerning). (c) NO BENEFIT of aggressive (no reduction in necrosis/severity). (3) CONCLUSION: GOAL-DIRECTED (not aggressive) — reassess frequently, stop when euvolaemic. (4) CLINICAL: 1.5 mL/kg/hr maintenance (Ringer's lactate) + small boluses (250 mL) if hypovolaemic + reassess q4-6h. Avoid 'panic bolusing' (causes overload).[4] Early enteral nutrition — the change from old practice. (1) OLD PRACTICE: 'NPO (bowel rest) + TPN' for pancreatitis — thought to reduce pancreatic stimulation -> reduce inflammation. (2) EVIDENCE (multiple RCTs + meta-analyses): EARLY ENTERAL NUTRITION (within 48h) is SUPERIOR: (a) REDUCES infected necrosis (maintains gut barrier -> less bacterial translocation). (b) REDUCES mortality. (c) REDUCES multi-organ failure. (d) Cheaper + fewer complications than TPN. (3) ROUTE: (a) ORAL: if tolerated (start when nausea resolves — low-fat solids). (b) NASOGASTRIC (NG): if vomiting or can't eat — NG feed tolerated (studies: NG as effective as NJ in most). (c) NASOJEJUNAL (NJ): historically preferred (bypass stomach -> 'less pancreatic stimulation') — but NO proven benefit over NG in trials (unless gastric outlet obstruction). (4) TIMING: within 48h of admission. (5) TPN: ONLY if enteral not tolerated (ileus, obstruction, prolonged). (6) NUTRITION: 25 kcal/kg/day (protein 1.5 g/kg/day).[2] Prophylactic antibiotics — NOT recommended (the change). (1) OLD PRACTICE: prophylactic antibiotics (carbapenem — penetrates pancreas) for all severe pancreatitis — thought to prevent infected necrosis. (2) EVIDENCE (meta-analyses, AGA 2018, IAP 2013): NO BENEFIT: (a) Does NOT reduce infected necrosis (no difference vs placebo). (b) Does NOT reduce mortality. (c) INCREASES antibiotic resistance + FUNGAL infection (Candida — from broad-spectrum). (d) INCREASES C. difficile. (3) CURRENT: DON'T give prophylactic antibiotics. (4) USE antibiotics ONLY if: (a) INFECTED NECROSIS (proven — gas on CT, positive culture, clinical sepsis). (b) CHOLANGITIS (biliary obstruction + infection — needs ERCP). (c) Other infection (pneumonia, line, UTI). (5) CHOICE for infected necrosis: CARBAPENEM (meropenem — penetrates necrosis well + broad Gram-negative/anaerobic cover) or QUINOLONE (ciprofloxacin) + METRONIDAZOLE. (6) ANTIFUNGAL: if Candida grows (common with prolonged broad-spectrum).[5] PANTER trial — step-up approach for infected necrosis. (1) PANTER (2010, NEJM): RCT — STEP-UP (percutaneous/endoscopic DRAINAGE first, then minimally invasive necrosectomy if needed) vs OPEN NECROSECTOMY. RESULT: (a) STEP-UP had FEWER major complications (fistula, bleeding — 40% vs 69%). (b) STEP-UP had FEWER deaths (19% vs 16% — trend). (c) 35% of step-up patients managed with DRAINAGE ALONE (no necrosectomy needed). (2) CONCLUSION: STEP-UP is PREFERRED — drain first, necrosectomy only if drainage insufficient. (3) WHY STEP-UP BETTER: (a) Less invasive (drainage via catheter/endoscope vs open surgery). (b) Less tissue trauma (smaller incisions, less bleeding). (c) Less physiological stress (open surgery in sick, inflamed patient -> high morbidity). (4) TENSION trial (2018): ENDOSCOPIC step-up vs SURGICAL (percutaneous) step-up -> endoscopic had FEWER fistulas + fewer interventions. (5) OPEN NECROSECTOMY: reserved for step-up failure (rare) or emergency (massive bleeding, perforation).[3] DELAY intervention 4 weeks — let necrosis wall off. (1) EARLY (<4 weeks) necrosis: POORLY DEMARCATED (liquid + solid components mixed with viable tissue) -> drainage/necrosectomy DIFFICULT + DANGEROUS (bleeding from viable tissue, incomplete removal). (2) LATE (>4 weeks) necrosis: becomes WALLED-OFF (encapsulated by fibrous capsule) -> separates from viable tissue -> drainage/necrosectomy SAFER (the wall contains the necrosis -> less spread -> easier to remove). (3) CLINICAL: (a) If patient SEPTIC from infected necrosis: drain ASAP (can't wait 4 weeks) — but use percutaneous/endoscopic (less invasive) + antibiotics. (b) If STABLE (not septic): WAIT 4 weeks -> then elective drainage (safer, better outcomes). (4) WHY DELAY IMPROVES OUTCOMES: (a) Less bleeding (wall separates from vessels). (b) More complete (wall contains). (c) Less fistula (wall prevents communication with bowel). (d) Better physiological state (patient recovered from acute inflammation). (5) THE BALANCE: septic -> drain now (don't wait despite risk); stable -> wait (better).[3] Gallstone pancreatitis + ERCP timing. (1) GALLSTONES = most common cause (40%). (2) ERCP (endoscopic retrograde cholangiopancreatography): removes CBD stone + sphincterotomy (prevents recurrence). (3) INDICATIONS for ERCP: (a) CHOLANGITIS (biliary obstruction + infection — fever, jaundice, RUQ pain — Charcot's triad) -> EMERGENCY ERCP (within 24-72h). (b) ONGOING BILIARY OBSTRUCTION (CBD stone confirmed — dilated CBD on imaging, rising bilirubin, not improving) -> URGENT ERCP. (4) NOT indicated (if stone PASSED — no obstruction): ERCP NOT needed (stone in stool) -> manage pancreatitis + cholecystectomy later. (5) MRCP/EUS first (non-invasive) to confirm CBD stone (if uncertain — avoid unnecessary ERCP). (6) CHOLECYSTECTOMY: (a) MILD pancreatitis: during SAME admission (prevent recurrence). (b) SEVERE pancreatitis: DELAYED (after recovery from acute inflammation — weeks) — operating in inflamed field is dangerous. (c) If necrosis: cholecystectomy after necrosis resolves (may be delayed months). (7) RECURRENCE: gallstone pancreatitis recurs 20-30% without cholecystectomy.[1] Hypertriglyceridaemia pancreatitis — special management. (1) SEVERE HYPERTRIGLYCERIDAEMIA (triglycerides >11 mmol/L) -> acute pancreatitis (mechanism: free fatty acids from chylomicron breakdown toxic to pancreatic acinar cells). (2) TYPES: genetic (familial chylomicronaemia — lipoprotein lipase deficiency), secondary (diabetes, alcohol, pregnancy, drugs — oestrogen, steroids, retinoic acid). (3) DIAGNOSIS: lipaemic serum (milky), triglycerides >11. (4) MANAGEMENT: (a) INSULIN/DEXTROSE infusion: activates lipoprotein lipase -> clears triglycerides (continuous IV insulin + glucose to maintain normoglycaemia). (b) PLASMAPHERESIS (therapeutic plasma exchange): removes triglycerides (if severe, refractory — especially in pregnancy). (c) AVOID: lipid-containing TPN (would worsen). (d) Long-term: FIBRATE (fenofibrate), omega-3 fatty acids, diet (low fat), diabetes control. (5) OUTCOME: similar to other causes (if triglycerides controlled).[2] Abdominal compartment syndrome in severe pancreatitis. (1) Severe pancreatitis -> massive FLUID SEQUESTRATION (retroperitoneum, bowel wall) + ILEUS -> ABDOMINAL DISTENSION -> raised INTRA-ABDOMINAL PRESSURE (IAP). (2) If IAP >20 mmHg + new organ failure (renal, respiratory) -> ABDOMINAL COMPARTMENT SYNDROME (ACS). (3) CONSEQUENCES: (a) Renal failure (IAP compresses renal veins -> reduced GFR). (b) Respiratory failure (diaphragm pushed up -> reduced tidal volume). (c) Intestinal ischaemia (mesenteric compression). (d) Cardiac (reduced venous return -> low cardiac output). (4) MANAGEMENT: (a) DECOMPRESS: nasogastric (decompress stomach), rectal tube, reduce fluid (diurese). (b) CHEMICAL: neuromuscular blockade (relax abdominal wall), sedation. (c) SURGICAL: decompressive laparotomy (open abdomen — last resort — if refractory). (d) MONITOR: bladder pressure (surrogate for IAP) in severe pancreatitis. (5) PREVENT: GOAL-DIRECTED fluids (avoid overload — WATERFALL), monitor IAP.[4] Predicting severity — Revised Atlanta + scoring. (1) CLINICAL: organ failure (Marshall/SOFA) at 48h -> severity. (2) APACHE II: ≥8 -> severe (complex — not bedside). (3) RANSON (old — 11 criteria — at admission + 48h — cumbersome). (4) BISAP (B — BUN >35, I — impaired mental status, S — SIRS, A — age >60, P — pleural effusion): score ≥3 -> severe (simple, bedside). (5) HARMLESS (Haemoconcentration, Arterial PO2, Renal function, Microbiology, Imaging, Nutrition, Age, Comorbidities, Enzymes, Severity, Sex) — Dutch scoring. (6) CT SEVERITY INDEX (Balthazar): grades necrosis (none, <30%, 30-50%, >50%) + inflammation (A-E) -> score 0-10. (7) REVISED ATLANTIC (2012): severity based on organ failure + local complications (the current standard — see above). (8) PRACTICE: use Revised Atlanta (clinical) + BISAP (bedside). APACHE/Ranson too complex for routine.[1] Organ failure management — the early killers. (1) RESPIRATORY (most common organ failure): (a) ARDS (capillary leak from SIRS) -> lung-protective ventilation (Vt 6 mL/kg, plateau <30, PEEP). (b) Proning if severe (PROSEVA). (c) Pleural effusion (common — 'reactive' — usually left-sided) -> drain if large/causing respiratory compromise. (2) CARDIOVASCULAR (shock): (a) Hypovolaemia (third space) + vasoplegia (SIRS) -> fluids (goal-directed) + vasopressors (noradrenaline). (b) Careful — fluid overload worsens pulmonary oedema + ACS. (3) RENAL (AKI): (a) Hypovolaemia + nephrotoxic mediators -> AKI. (b) Fluids (restore perfusion) -> if refractory -> RRT (CRRT if shocked). (4) These organ failures are the EARLY CAUSES of death (first week). Infected necrosis is the LATE cause (week 2-4).[5] Sterile vs infected necrosis — the diagnostic challenge. (1) STERILE (70%): (a) SIRS (from inflammation) — fever, raised WCC, raised CRP — but NO infection. (b) Can be hard to distinguish from infected (both have inflammatory signs). (2) INFECTED (30%): (a) GAS IN NECROSIS (on CT) — PATHOGNOMONIC for infected (bacteria produce gas). (b) CLINICAL DETERIORATION (worsening organ failure, sepsis) after initial improvement. (c) PERSISTENT fever despite no other source. (d) FINE NEEDLE ASPIRATION (FNA — culture necrosis) — definitive (if uncertain) — Gram stain + culture. (3) CT findings: (a) Necrosis: non-enhancing pancreatic tissue (after IV contrast — normally enhances; necrotic doesn't). (b) Gas: small bubbles in necrosis -> infected. (c) Walled-off: encapsulated (after 4 weeks). (4) MANAGEMENT difference: (a) Sterile -> conservative (no antibiotics, supportive). (b) Infected -> antibiotics + drainage (step-up). (5) OVER-TREATING sterile (antibiotics) -> resistance, fungal, C. diff (no benefit). (6) UNDER-TREATING infected (no antibiotics) -> sepsis, death.[3] Pseudocyst vs walled-off necrosis — distinguish. (1) PSEUDOCYST (after 4 weeks): (a) FLUID collection (encapsulated by fibrous wall). (b) NO solid component (liquid only). (c) From pancreatic duct disruption -> leak -> encapsulated fluid. (d) Management: observe (most resolve); drain if SYMPTOMATIC (pain, infection, gastric outlet obstruction) — endoscopic (cystgastrostomy) or surgical. (2) WALLED-OFF NECROSIS (after 4 weeks): (a) Encapsulated collection containing BOTH fluid AND SOLID necrotic tissue. (b) From necrotising pancreatitis -> necrosis becomes encapsulated. (c) Management: if symptomatic/infected -> drain (endoscopic — with necrosectomy for solid component) or percutaneous + VARD. (d) Harder to drain than pseudocyst (solid component needs removal). (3) DISTINGUISH on CT: (a) Pseudocyst: homogeneous fluid. (b) Walled-off necrosis: heterogeneous (fluid + solid). (4) CRITICAL: the management differs — pseudocyst drains easily (liquid); walled-off necrosis needs necrosectomy (solid).[6] Long-term sequelae + recurrence prevention. (1) ENDOCRINE: (a) Pancreatic endocrine failure (beta cells destroyed) -> DIABETES (type 3c — pancreatogenic). (b) May be transient (recovers) or permanent (extensive necrosis). (c) Monitor glucose; treat with insulin (may be insulin-resistant from sepsis/critical illness). (2) EXOCRINE: (a) Pancreatic exocrine failure (acinar cells destroyed) -> MALDIGESTION (steatorrhoea — oily stools, weight loss, fat-soluble vitamin deficiency). (b) PANCREATIC ENZYME REPLACEMENT (PERT — pancreatin/Creon — with meals) — lifelong if severe. (c) Monitor: faecal elastase (low = exocrine insufficiency). (3) RECURRENCE: (a) GALLSTONES: cholecystectomy (prevent recurrence). (b) ALCOHOL: cessation counselling (medications — acamprosate, naltrexone — reduce craving). (c) HYPERTRIGLYCERIDAEMIA: fibrate, omega-3, diet. (d) SMOKING: cessation (independent risk factor). (4) FOLLOW-UP: CT (resolution), endocrine (glucose, HbA1c), exocrine (faecal elastase, weight), recurrence prevention. (5) QUALITY OF LIFE: may be reduced (chronic pain, diabetes, maldigestion) — support.[5] PROPATRIA — probiotics CAUSED deaths (critical safety lesson). (1) RATIONALE: gut-barrier failure drives bacterial translocation -> infected necrosis; probiotics were theorised to restore barrier and prevent infection. (2) PROPATRIA (2008, Lancet, Besselink): RCT of multi-strain probiotic vs placebo in 296 patients with predicted severe pancreatitis. RESULT: (a) MORTALITY HIGHER with probiotics (16% vs 6% — RR 2.5). (b) 9 cases of BOWEL ISCHAEMIA in the probiotic arm (24 with organ failure) — NONE in placebo. (c) The harm was unsuspected and practice-changing. (3) CONCLUSION: PROBIOTICS are CONTRAINDICATED in predicted severe acute pancreatitis — do NOT give. (4) MECHANISM (probable): mucosal ischaemia in a low-flow, inflamed gut is worsened by live bacteria producing gas/fermentation -> distension -> mesenteric venous compression -> ischaemia. (5) EXAM POINT: when asked 'is there anything we can do to prevent infected necrosis pharmacologically?', the answer is NO — early enteral nutrition is the only gut-barrier intervention that works; probiotics are actively harmful.Ranson criteria — the 11 criteria (viva classic). (1) Scored twice — 5 AT ADMISSION + 6 at 48H. (2) ADMISSION (non-gallstone): age >55, WCC >16, glucose >11 mmol/L, AST >250, LDH >350. (3) AT 48H: haematocrit fall >10%, urea rise >1.8 mmol/L, calcium <2 mmol/L, PaO2 <8 kPa (60 mmHg), base deficit >4, fluid sequestration >6 L. (4) GALLSTONE variant swaps age (>70) and WCC (>18) and uses different 48h thresholds. (5) INTERPRETATION: 0–2 = 2% mortality; 3–4 = 15%; 5–6 = 40%; >6 = ~100%. (6) WEAKNESS: needs a full 48h — useless for ED triage; superseded for severity DETERMINATION by Revised Atlanta but still examined. (7) EXAM TIP: do not try to memorise all 11 — know that Ranson = 5-at-admission + 6-at-48h, requires 48h, and ≥3 = severe.BISAP + HAPS — bedside scoring (know both). (1) BISAP (5 items, within 24h): BUN >35 mg/dL (~8.9 mmol/L urea); Impaired mental status (GCS <15); SIRS (2+ of T, HR, RR, WCC); Age >60; Pleural effusion on imaging. (2) INTERPRETATION: 0–2 = low risk; ≥3 = severe (mortality ~5–20%, rising sharply with each point). (3) ADVANTAGE: entirely bedside, validated on a >18,000-patient US cohort, available within 24h (unlike Ranson's 48h). (4) HAPS (Harmless Acute Pancreatitis Score): 3 items — NO haemoconcentration (haematocrit normal), NO rebound/peritonitis, NO eating intolerance. All three ABSENT → very high negative predictive value for severe disease — i.e. identifies the MILD patient safe for discharge. (5) CLINICAL USE: HAPS = rule-OUT (who can go home); BISAP/Ranson/APACHE II = rule-IN severity (who needs ICU). (6) Viva answer: 'I use Revised Atlanta for severity determination, BISAP as a bedside early warning, and HAPS to identify mild disease for safe discharge.'CT Severity Index (Balthazar) — worked example. (1) Two components: INFLAMMATION grade (A = normal pancreas, B = pancreatic enlargement, C = peripancreatic inflammation, D = single fluid collection, E = two+ collections/gas) — A–C = 0, D = 1, E = 2 points. NECROSIS: none = 0, <30% = 2, 30–50% = 4, >50% = 6 points. (2) TOTAL = 0–10. INTERPRETATION: 0–3 mild mortality ~3%; 4–6 moderate ~6%; ≥7 severe mortality ~17%. (3) MODIFIED CTSI (Mortele 2004): peripancreatic inflammation 0–2 + necrosis 0/2/4/6 + extrapancreatic complications 0/2; correlates better with outcome than original. (4) TIMING: contrast CT should NOT be done in the first 48–72h — necrosis is under-developed and CT underestimates severity; repeat at 5–7 days if clinically needed. (5) NEPHROGENIC SYSTEMIC FIBROSIS and AKI: contrast risk — balance against information gained; withhold if eGFR low and clinical decision unchanged. (6) EXAM POINT: CTSI is ANATOMICAL — it grades necrosis, NOT organ failure — so a high CTSI does not by itself equal 'severe' (severity = organ failure by Revised Atlanta).Antibiotic penetration into the pancreas — the pharmacology. (1) The 'infected necrosis' antibiotic must achieve concentrations above MIC in PANCREATIC TISSUE/NECROSIS, not just serum. (2) TISSUE PENETRATION (Buchler/Bruno data): carbapenems (imipenem, meropenem) GOOD; quinolones (ciprofloxacin, ofloxacin) GOOD; metronidazole GOOD; third-gen cephalosporins MODERATE; piperacillin-tazobactam MODERATE–GOOD. (3) POOR penetration — AVOID as monotherapy: AMINOGLYCOSIDES (gentamicin, tobramycin) — do NOT reach therapeutic levels in pancreatic tissue; netilmicin borderline. (4) REGIMEN: monotherapy with carbapenem is first-line for infected necrosis; alternative = quinolone + metronidazole. (5) DURATION: 4–6 weeks (until source control + clinical/biochemical resolution) — short courses risk relapse, prolonged courses drive resistance/fungal superinfection (Candida). (6) ANTIFUNGAL: empirical antifungal NOT routine; add if CANDIDA isolated, prolonged broad-spectrum, or persistent fever with positive fungal markers. (7) EXAM TRAP: 'Why not gentamicin for infected pancreatic necrosis?' — Answer: aminoglycosides fail to penetrate pancreatic tissue and achieve sub-therapeutic levels; carbapenem is preferred.Disconnected pancreatic duct syndrome (DPDS). (1) DEFINITION: disruption of the main pancreatic duct with a viable segment of pancreatic parenchyma upstream that remains disconnected from the GI tract -> persistent pancreatic fistula, recurrent fluid collection, or walled-off necrosis that won't resolve. (2) MECHANISM: necrosis of the duct-bearing pancreatic neck/body -> the downstream tail stays alive but loses drainage. (3) DIAGNOSIS: MRCP (non-invasive); ERCP (definitive — shows duct cut-off); secretin-MRCP enhances sensitivity. (4) PRESENTATION in ICU: drain output that is AMYLASE-RICH and does not taper; recurrent peripancreatic collections after drain removal. (5) MANAGEMENT: (a) Conservative + nutrition (may close spontaneously if partial). (b) Endoscopic transpapillary stenting across the disruption (if reachable). (c) If distal duct disconnected: trans-enteric drainage of the disconnected segment (endoscopic cystgastrostomy) or surgical distal pancreatectomy once recovered. (6) WHY IT MATTERS: undiagnosed DPDS = recurrent pseudocyst, fistula, and readmission; recognise the high-amylase drain output early. (7) EXAM POINT: persistent high-output amylase-rich fluid after pancreatic drainage should prompt MRCP to evaluate for duct disruption/DPDS.Post-ERCP pancreatitis + prevention. (1) POST-ERCP PANCREATITIS is the commonest major ERCP complication (~3–10%, higher in sphincter of Oddi manometry). (2) RISK FACTORS: young age, female, normal bilirubin, prior post-ERCP pancreatitis, difficult cannulation, pancreatic duct injection, sphincter of Oddi dysfunction, ampullectomy, precut sphincterotomy. (3) PREVENTION (evidence-based): (a) RECTAL NON-STEROIDAL (100 mg diclofenac or indomethacin PR immediately before/after ERCP) — reduces incidence ~50% (Lancet 2012, EL RazTAW); (b) PROPHYLACTIC PANCREATIC DUCT STENT — reduces recurrence in high-risk patients (guideline-recommended for high-risk ERCP); (c) wire-guided cannulation, limiting pancreatic injection, aggressive IV hydration with lactated Ringer's (European RCT showed LR > NS). (d) Nitroglycerin sublingual and somatostatin — less consistent evidence. (4) HIGH-RISK PATIENT: pre-procedural rectal NSAID + attempt prophylactic pancreatic stent. (5) MANAGEMENT once it occurs: standard acute pancreatitis pathway (goal-directed fluids, early enteral nutrition, no prophylactic antibiotics). (6) EXAM POINT: RECTAL NSAID is the single best-evidenced, cheapest, most widely applicable preventive measure — know it. Red flags
Critical severe pancreatitis red flags
Severe = organ failure >48h (Revised Atlanta) — ICU.[8] WATERFALL : AGGRESSIVE fluids HARM -> goal-directed (1.5 mL/kg/hr, reassess q4-6h, stop at euvolaemia).[4] NO prophylactic antibiotics (Cochrane — no mortality/infected-necrosis benefit; raises resistance, fungal, C. diff).[5] EARLY enteral nutrition (within 48h) reduces infection/necrosis — do NOT 'rest the bowel'.[2] Infected necrosis : STEP-UP (PANTER) — drain first, necrosectomy only if drainage fails.[3] DELAY intervention ≥4 weeks (let necrosis wall off -> safer) — POINTER supports postponed source control in stable patients.[14] Gas in necrosis on CT = infected (pathognomonic — no FNA needed).[3] Cholangitis + gallstone pancreatitis -> EMERGENCY ERCP (within 24–72h).[1] Abdominal compartment syndrome — monitor IAP in severe pancreatitis; surgical decompression if refractory.[1] Severity thresholds for the viva : BISAP ≥3, Ranson ≥3 (at 48h), APACHE II ≥8, CTSI ≥7 — each flags severe disease.[9] HAPS (all 3 absent = haematocrit normal, no peritonitis, tolerating food) → rules OUT severity — safe discharge candidate.[12] PROPATRIA: probiotics are CONTRAINDICATED — increased mortality (16% vs 6%) and bowel ischaemia.[7] Antibiotic for infected necrosis must PENETRATE pancreas — carbapenem or quinolone+metronidazole; aminoglycosides FAIL.[15] Post-ERCP pancreatitis prevention : RECTAL diclofenac/indomethacin + prophylactic pancreatic duct stent in high-risk patients.[2] Persistent amylase-rich drain output after drainage -> suspect DISCONNECTED PANCREATIC DUCT (MRCP).[8] TENSION : endoscopic step-up preferred over surgical when collection abuts stomach/duodenum (fewer fistulae/interventions).[6] Prognosis
Severe acute pancreatitis evidence and outcomes Figure Exam overview — key physiology, red flags and first-hour management. Figure Stepwise ICU management: immediate priorities, disease-specific therapy, escalation. Figure Classification / severity framework used in written and viva answers. Densification notes for fellowship revision
This leaf is densified to the ICU fellowship gate standard (CICM / FFICM / EDIC): embedded SAQ practice, multi-figure visual scaffolding, examiner map alignment, and MCQ coverage of definition, mechanism, first-hour management, evidence, and traps.
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Revision checkpoint 1: restate definition, one number examiners expect, and one absolute do-not-miss action for severe-pancreatitis-fluid-necrosis-panter .
Revision checkpoint 2: restate pathophysiology in one sentence and the first investigation that changes management.
Revision checkpoint 3: restate first-hour management priorities in order.
Revision checkpoint 4: restate the key severity or risk score and how it alters disposition.
Revision checkpoint 5: restate one landmark trial or guideline and its practical bedside message.
Revision checkpoint 6: restate the most dangerous treatment trap.
Revision checkpoint 7: restate monitoring targets for the first 24 hours.
Revision checkpoint 8: restate escalation criteria (what forces source control, advanced support, or transfer).
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[8] References [1] Working Group IAP/APA Acute Pancreatitis Guidelines IAP/APA evidence-based guidelines for the management of acute pancreatitis. Pancreatology : official journal of the International Association of Pancreatology (IAP) ... [et al.] , 2013.PMID 24054878 [2] Tenner S, et al. American College of Gastroenterology guideline: management of acute pancreatitis. The American journal of gastroenterology , 2013.PMID 23896955 [3] van Santvoort HC, et al. A step-up approach or open necrosectomy for necrotizing pancreatitis. The New England journal of medicine , 2010.PMID 20410514 [4] de-Madaria E, et al. Aggressive or Moderate Fluid Resuscitation in Acute Pancreatitis. The New England journal of medicine , 2022.PMID 36103415 [5] Villatoro E, et al. Antibiotic therapy for prophylaxis against infection of pancreatic necrosis in acute pancreatitis. The Cochrane database of systematic reviews , 2010.PMID 20464721 [6] van Brunschot S, et al. Endoscopic or surgical step-up approach for infected necrotising pancreatitis: a multicentre randomised trial. Lancet (London, England) , 2018.PMID 29108721 [7] Besselink MG, et al. Probiotic prophylaxis in predicted severe acute pancreatitis: a randomised, double-blind, placebo-controlled trial. Lancet (London, England) , 2008.PMID 18279948 [8] Banks PA, et al. Classification of acute pancreatitis--2012: revision of the Atlanta classification and definitions by international consensus. Gut , 2013.PMID 23100216 [9] Papachristou GI, et al. Comparison of BISAP, Ranson's, APACHE-II, and CTSI scores in predicting organ failure, complications, and mortality in acute pancreatitis. The American journal of gastroenterology , 2010.PMID 19861954 [10] Balthazar EJ, et al. Acute pancreatitis: value of CT in establishing prognosis. Radiology , 1990.PMID 2296641 [11] Mortele KJ, et al. A modified CT severity index for evaluating acute pancreatitis: improved correlation with patient outcome. AJR. American journal of roentgenology , 2004.PMID 15505289 [12] Lankisch PG, et al. The harmless acute pancreatitis score: a clinical algorithm for rapid initial stratification of nonsevere disease. Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association , 2009.PMID 19245846 [13] Ranson JH, et al. Prognostic signs and the role of operative management in acute pancreatitis. Surgery, gynecology & obstetrics , 1974.PMID 4834279 [14] Van Veldhuisen CL, et al. Long-Term Outcome of Immediate Versus Postponed Intervention in Patients With Infected Necrotizing Pancreatitis (POINTER): Multicenter Randomized Trial. Annals of surgery , 2024.PMID 37450701 [15] Timmerhuis HC, et al. Overuse and Misuse of Antibiotics and the Clinical Consequence in Necrotizing Pancreatitis: An Observational Multicenter Study. Annals of surgery , 2023.PMID 36728517 
