Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.
Recognise persistent respiratory, cardiovascular or renal failure in acute pancreatitis, organise critical-care support, nutrition and complication surveillance, and avoid interventions that worsen early inflammatory injury.
Severe pancreatitis is a systemic critical illness, not simply a more painful form of pancreatic inflammation. Cytokine release, endothelial leak and vasodilatation reduce effective circulating volume, impair lungs and kidneys and can cause distributive shock. Local necrosis may be present, but the extent of necrosis and the degree of early organ failure are not identical. The revised severity definition uses persistent organ failure beyond forty-eight hours because this is strongly associated with mortality and complex recovery.
Care requires simultaneous organ support and restraint. Oxygenation may deteriorate through atelectasis, pleural effusions, aspiration, inflammatory lung injury, fluid overload or pulmonary embolism. Renal injury may reflect hypoperfusion, inflammation, abdominal pressure, sepsis or nephrotoxins. Hypotension needs repeated haemodynamic assessment, cautious fluid challenge when responsive and vasopressors in critical care when vasodilatation persists. A protocol that ignores the patient's heart, lungs and cumulative balance can convert attempted resuscitation into harm.
Gallstone, alcohol-related and other acute pancreatitis causes can trigger persistent organ failure; enzyme concentration does not predict which episode will progress.
Older age, obesity, cardiopulmonary or renal disease and frailty reduce physiological reserve during inflammatory capillary leak and fluid resuscitation.
Cholangitis, infected necrosis and abdominal compartment effects can superimpose sepsis or mechanical organ dysfunction on sterile early inflammation.
Pancreatic injury releases cytokines and activated enzymes, producing vasodilatation, endothelial dysfunction and widespread capillary permeability beyond the pancreas.
Third spacing reduces effective perfusion while pulmonary and tissue oedema impair oxygenation, renal filtration and abdominal organ flow.
Unresolved respiratory, cardiovascular or renal dysfunction defines severe disease and sustains a cycle of hypoxia, acidosis and further pancreatic necrosis.
Continuing hypoxaemia, rising oxygen or ventilatory requirement and inflammatory lung injury beyond forty-eight hours meets severe-disease physiology and needs critical-care support.
Hypotension, cool or mottled peripheries, delayed refill, increasing lactate or vasopressor requirement indicates shock requiring cause review and invasive-level reassessment.
Oliguria, creatinine rise, hyperkalaemia, acidosis or fluid intolerance can progress despite apparently adequate volume and should trigger nephrology or critical-care input.
Tense distension, worsening ventilation, oliguria and haemodynamic compromise suggest intra-abdominal hypertension or compartment syndrome and need urgent surgical-critical-care assessment.
New fever, shock, rising support or deterioration after a period of improvement raises infected necrosis, line infection, pneumonia, cholangitis or another acquired source.
Fever, jaundice, duct obstruction, positive cultures or focal infection may require drainage and antimicrobials beyond supportive pancreatitis care.
Free gas, vascular occlusion, pain out of proportion or non-enhancing bowel suggests another abdominal catastrophe requiring urgent source control.
ECG, echocardiography, lung imaging, urine findings and baseline function help separate comorbid decompensation from pancreatitis-driven organ injury.
Acute lung injury, vasodilatory shock and kidney injury often coexist and require early critical-care support rather than enzyme-guided monitoring.
Poor pancreatic perfusion produces devitalised tissue that may later become infected, causing recurrent sepsis and specialist drainage need.
Ileus, fluid collections and oedema can raise intra-abdominal pressure, while prolonged catabolism and feeding intolerance cause severe muscle loss.
Organ failure continuing beyond forty-eight hours distinguishes severe disease; transient failure is still clinically important and not mild.
Capillary leak does not mean every hypotensive episode is volume responsive, particularly after a large positive balance accumulates.
Non-enhancing pancreas can remain sterile; antibiotics are triggered by infection evidence, not by necrosis on CT alone.
When clinically possible, maturation of necrotic collections permits safer minimally invasive drainage and debridement than early open surgery.
Critical-illness neuropathy, pancreatic insufficiency, diabetes, pain and psychological trauma need coordinated follow-up after organ support ends.
Calling a high CRP or lipase value organ failure.
Continuing automatic fluid boluses despite pulmonary congestion and positive balance.
Giving carbapenem prophylaxis to sterile necrotising pancreatitis.
Starting parenteral nutrition before testing a feasible enteral strategy.
Operating early on stable necrosis merely because CT looks dramatic.
Missing haemorrhage or compartment syndrome while attributing every decline to inflammation.
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A patient with acute pancreatitis requires cardiovascular and respiratory organ support that continues for three days. Which description best matches the NICE severity definition?
National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.
Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes
Monitor rhythm, extremity and gut perfusion, extravasation and lactate; increasing requirement should intensify the search for bleeding, sepsis or inadequate source control.
Sterile inflammation commonly causes fever and CRP elevation; avoid prophylaxis, obtain cultures when possible and pair infected necrosis treatment with drainage planning.
Interrupted feeding, renal recovery and reduced glucagon reserve can precipitate hypoglycaemia; avoid overly tight targets and coordinate every nutrition change.