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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.

Haemoptysis

Respiratory · UK scope · Sources checked 27 Aug 2026 · Clinical review pending

RapidFull
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Escalate

Haemoptysis becomes life-threatening when bleeding threatens airway patency, ventilation or circulation, regardless of an imprecise reported volume. Sit the patient appropriately, call anaesthetic, respiratory, interventional-radiology and thoracic support early, correct physiological compromise and avoid leaving an actively bleeding patient unattended for diagnostic tests.

Synopsis

Confirm true lower-respiratory bleeding, protect the airway in life-threatening haemoptysis, and identify malignancy, infection, bronchiectasis, vascular disease and treatment-related bleeding through a severity-led investigation pathway.

  • First confirm the source: haemoptysis is coughed from below the larynx, while epistaxis, oral bleeding and haematemesis require different pathways.
  • Severity is physiological, not purely volumetric. Airway flooding, impaired gas exchange, haemodynamic instability or continuing brisk bleeding defines an emergency even when volume is uncertain.
  • Ask about lung-cancer risk, bronchiectasis, tuberculosis exposure, infection, pulmonary embolism, autoimmune disease, recent procedures and anticoagulant or antiplatelet treatment.
  • Unexplained haemoptysis in a person aged forty or over meets NICE criteria for a suspected lung-cancer pathway referral; an abnormal radiograph can trigger referral at any relevant age.
  • Chest radiography is a useful start in stable bleeding, but contrast-enhanced CT or CT angiography usually provides better localisation and cause assessment; CTPA is selected when embolism is the question.
  • Bronchoscopy is important for airway control, clot extraction, central lesions and persistent bleeding; it complements rather than automatically replaces CT.
  • Review anticoagulants, platelet inhibitors and coagulation abnormalities immediately, but do not assume treatment is the underlying cause until structural disease has been considered.
  • Bronchial arteries cause most severe haemoptysis; bronchial-artery embolisation is a key definitive treatment for ongoing or recurrent significant bleeding.

Key red flags

Life-threatening haemoptysis

Active bleeding with inability to clear blood, falling saturation, respiratory distress, reduced consciousness, hypotension or a rapidly filling airway requires simultaneous resuscitation and haemorrhage control. Reported millilitres should not delay escalation.

Malignancy pattern

Unexplained recurrent bleeding, weight loss, persistent cough, hoarseness, clubbing, lymphadenopathy or focal/recurrent radiographic change is concerning, especially with age over forty, smoking or asbestos exposure. Minor streaking can still be the presenting feature.

Pulmonary vascular pattern

Pleuritic pain, sudden breathlessness, syncope, hypoxaemia or thrombosis risk raises pulmonary embolism. Recurrent unexplained hypoxaemia, telangiectasia or family history may suggest pulmonary arteriovenous malformation.

Diffuse alveolar haemorrhage

Haemoptysis with diffuse infiltrates, falling haemoglobin, hypoxaemia and renal, skin or systemic inflammatory features raises pulmonary capillaritis or another alveolar-haemorrhage syndrome. Haemoptysis may be absent despite substantial alveolar bleeding.

Investigation priorities

01
ABCDE assessment, continuous oximetry and quantified bleeding trendFirst step

Determine whether haemoptysis is immediately threatening airway, ventilation or circulation.

Management branches

EmergencyLife-threatening active bleeding

Airway contamination, gas-exchange failure, haemodynamic compromise or continuing brisk haemoptysis.

  1. Activate major clinical support including anaesthesia, respiratory, interventional radiology and thoracic surgery; use high-flow suction, monitoring, large-bore access and blood preparation while protecting staff and patient.
  2. If the bleeding side is known, position that lung dependent where feasible to protect the other lung; provide oxygen and ventilation support, recognising that a large single-lumen airway may be required for suction and bronchoscopy.
  3. Withhold and reverse clinically significant anticoagulation according to the specific agent, timing, renal function and local major-bleeding protocol; correct major thrombocytopenia or coagulopathy with haematology input.
  4. Use urgent contrast CT/angiography if the patient can be transferred safely, or bronchoscopy when airway control cannot wait; proceed to bronchial-artery embolisation for a suitable ongoing systemic arterial source.
  5. Plan surgery only for selected uncontrolled bleeding or a surgically correctable lesion because emergency resection carries substantial risk.
StableNon-massive haemoptysis assessment

Blood-streaking or small-volume haemoptysis with stable airway, oxygenation and haemodynamics.

Key medicines

Agent-specific anticoagulant reversalUse the locally adopted major-bleeding protocol for the exact anticoagulant, last dose, renal function and bleeding severity; obtain urgent haematology advice.Reversal can increase thrombosis risk and is not a substitute for airway protection and source control. Conventional coagulation tests may not quantify direct oral anticoagulants reliably.
Antimicrobial therapy for a confirmed infective causeSelect agent, route and duration from the relevant pneumonia, bronchiectasis or tuberculosis guideline and current microbiology rather than treating haemoptysis empirically.Antibiotics do not exclude cancer or vascular disease. Obtain cultures when feasible, check allergy and renal function, and reassess persistent or recurrent bleeding.
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Sources and review status5 sources · checked 27 Aug 2026 · clinical review pending+
Sources

Sources and review status

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.

  • NICE NG12 suspected cancer guidanceAge-specific haemoptysis and abnormal-radiograph triggers for urgent lung-cancer assessment.
  • British Thoracic Society bronchiectasis guidelineHaemoptysis within bronchiectasis assessment, microbiology and specialist management.
  • NICE NG158 venous thromboembolic diseasesProbability-led investigation when pulmonary embolism is a plausible bleeding cause.
  • British Thoracic Society flexible bronchoscopy guidelineBronchoscopic safety and airway investigation; emergency practice remains locally protocolled.
  • NHS England timed lung-cancer diagnostic pathwayClosed-loop chest imaging and escalation towards CT within the English lung-cancer pathway.

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom
Confirm the source, examine nose, mouth and chest, establish cancer, infection, embolism and medicine risks, and obtain observations, blood count, coagulation/renal profile and chest radiograph.
  • Refer through the suspected-cancer pathway when NICE criteria are met; use CT despite a normal radiograph when risk, recurrence or unexplained bleeding warrants it.
  • Treat an established infection or bronchiectasis exacerbation using the relevant guideline and microbiology, while retaining a plan to exclude structural disease when bleeding is recurrent or disproportionate.
  • Give explicit return advice for increasing volume, breathlessness, dizziness or recurrent bleeding and assign ownership of imaging and specialist results.