Hemoptysis

See Also

Hemoptysis Causes

Definitions

Hemoptysis
1. Blood expectorated from the lung parenchyma or airways (trachea, Bronchi, Bronchioles)
Massive Hemoptysis
1. Functional diagnosis of critically ill patient with impaired airway or hemodynamic compromise
2. Older criteria included expectoration of >100 ml of blood per 24 hours (or 50 ml in a single cough)
  1. Various volume criteria have been used ranging from 100 to 600 ml per 24 hours
Life-Threatening Hemoptysis
1. Hemoptysis AND
2. Hemodynamic instability, abnormal gas exchange or need for urgent Resuscitation

Precautions

Even small volumes of bright red blood (not simply blood tinged Sputum) may herald Massive Hemoptysis
Evaluate carefully and consider early Endotracheal Intubation in high risk cases
Patients with Hemoptysis die of asphyxiation, not Hemorrhage

Epidemiology

Incidence: 1 in 1000 patients per year
Only 5-15% of hempotysis cases meet criteria for Massive Hemoptysis
1. Massive Hemoptysis is associated with a 50% mortality rate

Pathophysiology
Arterial Sources of Bleeding

See Hemoptysis Causes
Bronchial Artery (90%)
1. Bronchial arteries are the primary arterial supply of intrapulmonary arteries
2. Bronchial arteries anastomose with pulmonary arteries
3. Pulmonary artery impaired flow (e.g. Pulmonary Embolism) shunts blood through Bronchial arteries
  1. Bronchial arteries have thin walls and are subject to rupture, with bleeding into alveoli and Bronchi
Pulmonary Artery
1. Pseudoaneurysms form in pulmonary arteries when adjacent lung parenchyma is chronically inflamed
2. Chronic inflammation has many causes (e.g. Tb, cancer, Fungal Lung Infection, Lung Abscess)
Non-Bronchial Systemic Artery
1. Neovascularization and collateral circulation develops in response to chronic inflammation (see above)
2. Affected vessels anastomose with fragile pulmonary vessels, which on rupture cause Hemoptysis

History

See Hemoptysis Causes
Severity of Hemoptysis
1. Blood streaked Sputum
  1. Typically appropriate for outpatient evaluation
2. Gross Hemoptysis
  1. Exercise caution
  2. Even initially small volumes of Hemoptysis may progress to Massive Hemoptysis
Past medical history
1. Congestive Heart Failure
2. Valvular heart disease
3. Obstructive Lung Disease (e.g. COPD, Asthma, Bronchiectasis)
4. Pulmonary Embolism Risk Factors (e.g. surgery, immobilization, travel, Estrogens, Family History)
5. Cirrhosis or other Chronic Liver Disease
6. Renal disease
7. Personal or Family History of Bleeding Disorders (Coagulopathy, Thrombocytopenia)
8. History or exposure to Tuberculosis (e.g. international travel to endemic regions)
9. Cancer history
Medications and toxins
1. Anticoagulants (e.g. Warfarin, DOACs)
2. Antplatelet Medications (e.g. Aspirin, Clopidogrel)
3. Immunosuppression
4. Tobacco Abuse (Lung Cancer, COPD, Bronchiectasis)
5. Cocaine Inhalation
Cough
1. Obstructive Lung Disease (e.g. Bronchiectasis, COPD, Asthma)
2. Foreign Body Aspiration
3. Infection (Acute Bronchitis, Pneumonia, Tuberculosis)
Fever
1. Acute Bronchitis (most common cause)
2. Pneumonia
3. Lung Abscess
4. Tuberculosis
5. Pulmonary Embolism
6. Lung Cancer
7. Rheumatologic Disease
Trauma
1. Airway Trauma
2. Lung Contusion
3. Pulmonary Embolism
Weight loss
Travel or birth in endemic Tuberculosis regions
1. Tuberculosis (U.S. Immigrants have 4 fold higher risk)
Miscellaneous
1. Other sites of bleeding (e.g. Hematuria, melana, Epistaxis, Menorrhagia)

Exam

Complete Vital Signs
Examine for bleeding sources
1. Oropharyngeal lesions or bleeding
2. Epistaxis
3. External Trauma to head, neck or chest
4. Rectal exam for black stool (upper gastrointestinal Hemorrhage)
Examine for signs of Coagulopathy or other underlying Hemorrhage or inflammation risks
1. Petechiae or Purpura
2. Cirrhosis stigmata
3. Cachexia
4. Rheumatologic findings (e.g. synovitis, Cutaneous Signs of Rheumatic Disease)
Hemoptysis
1. Frothy Sputum with bright red blood, and alkaline pH
2. Contrast with Hematemesis (coffee grounds with acidic pH)
Findings suggestive of Massive Hemoptysis (respiratory or hemodynamic compromise)
1. Dyspnea
2. Tachypnea
3. Increased work of breathing
4. Wheezing
5. Cyanosis
6. Hypoxia
7. Altered Mental Status
8. Hypotension
9. Tachycardia

Labs

First-line studies
1. Complete Blood Count with Platelets and differential
2. ProTime (PT, INR)
3. Partial Thromboplastin Time (aPTT)
4. Blood Type and cross-match (in Massive Hemoptysis)
5. Comprehensive Metabolic Panel
6. Sputum Gram Stain and culture
  1. Consider acid-fast bacilli, Fungal Culture, cytology
Other studies to consider
1. D-Dimer
2. HIV Test
3. Brain Natriuretic Peptide (BNP)
4. Arterial Blood Gas or Venous Blood Gas
5. Quantiferon-TB (or PPD)
  1. Does not replace Sputum testing when acute symptoms are present
6. Electrocardiogram (EKG)
7. Acute phase reactants (e.g. C-RP, ESR)
8. Rheumatologic studies (e.g. ANCA, FANA, anticardiolipin, xGBM)
9. Spirometry or Pulmonary Function Tests
  1. Do not perform in acute Hemoptysis (consider once stabilized)

Imaging

Chest XRay
1. First-line in most cases
2. Test Sensitivity for identifying bleeding site: 33%-82% (and identifies cause in 35% of cases)
  1. Findings include Pneumonia, cavitary lesions, Lung Abscess, Lung Mass, alveolar Hemorrhage
  2. Lower sensitivity for Lung Cancer (misses up to 10% of Bronchogenic Carcinomas in Hemoptysis)
    1. Thirumaran (2009) Thorax 64(10): 854-6 [PubMed]
Chest CT with Contrast indications (typically perform as CTA, with PE timed contrast)
1. Test Sensitivity for detecting bleeding site
  1. Standard Chest CT: 70-88% (and identifies the cause in 60-77% of cases)
  2. Multidetector Chest CT: 100% for Bronchial arteries (62% for non-Bronchial arteries)
2. Identify source of Hemoptysis to direct Intervention Radiology or surgery (Massive Hemoptysis)
3. Mass lesion on Chest XRay
4. Lung Cancer risk factors (e.g. Tobacco Abuse)
5. Failed resolution of Pulmonary Infiltrate on Chest XRay
6. Suspected Pulmonary Embolism
7. Persistent symptoms despite negative Chest XRay
Bronchoscopy indications
1. Test Sensitivity for identifying bleeding site: 73-93% (and identifies cause in <8% of cases)
2. CT chest non-diagnostic
3. Mass lesion on Chest XRay
4. Recurrent Hemoptysis
Bronchial artery arteriography
1. Used in some cases when Intervention Radiology is planned for embolization
Echocardiogram
1. Consider (esp. early POCUS) in the evaluation of cardiovascular cause (e.g. CHF)
Consider other diagnostics if suspected Pseudohemoptysis
1. Upper Endoscopy
2. Nasopharyngoscopy

Differential Diagnosis

See Hemoptysis Causes
Distinguish from Pseudohemoptysis (e.g. upper respiratory or gastrointestinal source)
Hemoptysis is with no known cause (cryptogenic) in 20 to 50% of cases
Hemoptysis requiring acute emergent management is from Bronchial arteries in 90% of cases

Evaluation
Non-Massive Hemoptysis

See labs above
Step 1: Consider non-lower respiratory cause (Pseudohemoptysis)
1. Upper respiratory source (e.g. Sinusitis)
2. Upper Gastrointestinal Bleeding (Hematemesis)
  1. Coffee grounds with acidic pH
Step 2: Chest XRay
1. See imaging as above
2. Treat suspected causes based on initial findings
Step 3: CT Chest or CTA Chest Indications
1. Non-diagnostic history, exam, labs and chest x-ray
2. High suspicion for serious underlying cause (e.g. Pulmonary Embolism, Trauma, cancer)
Step 4: Bronchoscopy Indications
1. See imaging above

Management
Massive Hemoptysis

See ABC Management
Position patient with bleeding lung side down (if known source, e.g. Lung Lesion)
Patient alert, not hypoxic and able to clear their own airway
1. Supplemental Oxygen
2. Avoid BIPAP or other positive pressure that interferes with airway clearance of blood
3. Observe closely for decompensation
  1. Bronchial tree will completely fill with 150-200 cc of blood
Advanced Airway (patient decompensating, hypoxic)
1. Attempt awake intubation under Ketamine
  1. Allows for visualization of cords as patient coughs and clears airway
2. Large bore suction or suction via Endotracheal Tube attached to meconium aspirator
3. Place as large a bore Endotracheal Tube as possible (e.g. >7.5 up to 8.5)
4. Emergency Cricothyrotomy if unable to intubate
Imaging
1. Obtain portable Chest XRay
2. Obtain CT Chest or CTA Chest only when stable
Lung isolation
1. Best performed by bronchoscopy if skilled operator available (e.g. pulmonology, thoracic surgery)
2. Suspected source of Massive Hemorrhage is on the LEFT
  1. Pass the Endotracheal Tube into the right mainstem Bronchus (bleeding should stop)
3. Suspected source of Massive Hemorrhage is on the RIGHT
  1. Pull ET Tube back to glottis (but still below Vocal Cords)
  2. Pass bougie (or bronchoscope) through ET Tube and rotate bougie 90 degrees left
  3. Pass ET Tube over the bougie and assess bleeding and position (auscultation, Chest XRay)
Emergent Consultation
1. Pulmonology Consultation for bronchoscopy
  1. Endobronchial lesion
  2. Source unknown
2. Intervention Radiology for directed Bronchial artery embolization (Bronchial arteries are source in 90% of cases)
  1. Efficacy in control of Hemorrhage: >70%
  2. Indications
    1. Parenchymal bleeding identified
    2. Non-surgical candidate with vascular injury (e.g. Trauma)
    3. Refractory Hemorrhage despite bronchoscopy or thoracic surgery
  3. Recurrent bleeding risk
    1. Occurs in 10 to 58% of patients
    2. Median onset of rebleeding at 6-12 months (unlikely after 3 years)
    3. Rebleeding Risk Factors
      1. Aspergillosis
      2. Tuberculosis
      3. Cancer
      4. Severe Hemoptysis history
      5. Findings on bronchoscopy (blood clots or active bleeding)
3. Cardiothoracic surgery Consultation
  1. Indicated in Hemorrhage following Chest Trauma or vascular injury
  2. Surgical Complications include perioperative bleeding, asphyxia, Bronchopleural Fistula
  3. High mortality risk
    1. Not actively bleeding: 2 to 18% mortality
    2. Active Hemoptysis: 25 to 50% mortality
4. ECMO may be needed
Manage Coagulopathy
1. See Coagulation Bleeding Disorders
2. See Emergent Reversal of Anticoagulation
3. Consider Tranexamic Acid (TXA)
References
1. Swaminathan and Weingart in Herbert (2019) EM:Rap 19(3): 10-11

Management
Indications for ICU Admission or Tertiary Care Transfer

Lesions at the highest risk of bleeding (e.g. Aspergillus infection, pulmonary artery involved)
Respiratory distress or Hypoxia
1. Respiratory Rate >30 per minute
2. Oxygen Saturation <88% on room air
3. Requiring High Flow Oxygen at >8 L/min or Mechanical Ventilation
Hemodynamic instability
1. Hemoglobin < 8 g/dl or more than 2 g/dl drop from baseline
2. Disseminated Intravascular Coagulation (DIC) or other consumptive Coagulopathy
3. Hypotension requiring intervention (fluid bolus, transfusion, Vasopressors)
Massive Hemoptysis
1. Hemoptysis >200 ml per 24 hours OR
2. Hemoptysis >50 ml per 24 hours in a patient with COPD
Serious comorbidity
1. Previous pneumonectomy
2. Chronic Obstructive Pulmonary Disease (COPD)
3. Cystic Fibrosis
4. Ischemic Heart Disease
References
1. Fartoukh (2010) Rev Mal Respir 27(10): 1243-53 +PMID:21163400 [PubMed]

Management
Non-Massive Hemoptysis

See Evaluation above
Consider antibiotic course if symptoms or signs of lower respiratory infection
Consider Antitussive medications
Serially re-evaluate
Consider CT Chest
Consider pulmonology Consultation for bronchoscopy

Prognosis
Moderate to Severe Hemoptysis Mortality

Criteria
1. Score 1: Admit Chest XRay with involvement of 2 or more lung quadrants
2. Score 1: Chronic Alcoholism
3. Score 1: Pulmonary artery involvement
4. Score 2: Aspergillosis
5. Score 2: Malignancy
6. Score 2: Mechanical Ventilation required
Interpretation
1. Admit to ICU for score >2 (see other indications above)
2. Consider urgent Intervention Radiology for score >5
Mortality: In-Hospital
1. Total 0: Mortality 1%
2. Total 1: Mortality 2%
3. Total 2: Mortality 6%
4. Total 3: Mortality 16%
5. Total 4: Mortality 34%
6. Total 5: Mortality 58%
7. Total 6: Mortality 79%
8. Total 7: Mortality 91%
References
1. Fartoukh (2012) Respiration 83(2): 106-14 +PMID:22025193 [PubMed]

Prognosis
Mild Hemoptysis

Mortality: 0.3%
Recurrence in 19% of patients (73% rebleed in first 2 years)
Risks for recurrent bleeding
1. Aspergillosis
2. Nontuberculous Mycobacterium infection
3. Smoking
4. Findings on bronchoscopy (blood clots or active bleeding)
References
1. Choi (2018) Am J Emerg Med 36(7): 1160-5

References