Educational draft · awaiting clinical reviewUse Rapid for revision, not patient-care decisions. Check current national and local guidance and the BNF or BNFC before acting.
2 min synopsisUK scopeSources checked 27 Aug 2026Clinical review pending
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Active catastrophic haemorrhage
A large bleed can cause airway obstruction, shock, panic and death within minutes. The first response must follow the previously agreed goal while ensuring no conscious patient is left alone.
Action: Call for help, stay with the person, use a calm voice, safe positioning and direct pressure when possible and cover visible blood with dark towels. Activate emergency major-haemorrhage care if rescue is intended; for a terminal comfort plan, give prescribed rapid midazolam by the authorised feasible route if distress persists and avoid separating reassurance from medicine delivery.
Synopsis
Identify people at credible risk of catastrophic bleeding, reduce preventable causes, agree resuscitative or comfort priorities, prepare teams and carers without causing avoidable alarm and respond with presence, haemostasis and rapid anxiolysis.
Catastrophic haemorrhage is rapid, life-threatening bleeding from tumour erosion, vessel fistula, ulceration, thrombocytopenia, coagulopathy or anticoagulant effect; risk must be individualised rather than assumed from diagnosis alone.
Sentinel bleeds, pulsatile tumour, threatened carotid or major vessel on imaging, recurrent haemoptysis or haematemesis and worsening thrombocytopenia demand urgent specialist review.
First-line prevention treats an achievable source: local pressure or dressing, radiotherapy, endoscopy, embolisation, surgery, antifibrinolytic or correction of anticoagulant and haematological factors as appropriate.
Key red flags
Any sentinel bleed from a tumour close to a major vessel warrants urgent review even if observations recover.
Catastrophic terminal event
Uncontrollable high-volume bleeding with rapid loss of consciousness may leave only minutes for presence, pressure and preplanned comfort treatment.
Investigation priorities
01
First-line bleeding history and source examinationFirst stepFirst line
Define site, volume, tempo, sentinel episodes, triggers, accessible pressure points, tumour anatomy and current antithrombotic treatment.
Management branches
Risk reductionTreat the source before catastrophe
Sentinel bleeding or anatomy indicates a credible major-haemorrhage risk and intervention may provide worthwhile benefit.
Escalate to the relevant oncology, surgery, endoscopy or interventional team and define source, vessel involvement, haemostatic defects and current antithrombotics.
Choose local care, radiotherapy, embolisation, covered stent, endoscopic therapy, surgery, reversal or component support according to mechanism and goal.
Key medicines
Pre-authorised midazolam for terminal bleeding panicA common specialist crisis prescription is midazolam 10 mg by intravenous, intramuscular or buccal route according to existing access and local palliative protocol, repeated only under the documented response plan.
Tranexamic acid for selected non-terminal bleedingUse a site-specific oral, topical or intravenous regimen only after thrombosis, renal function, haematuria and the intended haemostatic procedure have been reviewed under the local bleeding pathway.
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.