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Home|What Is A Pulmonary Embolism?

What Is A Pulmonary Embolism?

A pulmonary embolism (PE) is a blockage in one of the pulmonary arteries in the lungs, typically caused by blood clots that travel to the lungs from the legs or other parts of the body (a condition known as deep vein thrombosis, or DVT). This blockage can restrict blood flow to the lung tissue, leading to various symptoms and potentially serious complications.

Sudden shortness of breath

Chest pain, which may feel like a heart attack

Coughing up blood

Rapid heart rate

Lightheadedness or fainting

What are the causes of PE?

Pulmonary embolism (PE) is primarily caused by blood clots that travel to the lungs from the veins in the legs or other parts of the body (deep vein thrombosis, or DVT). Here are some common causes and risk factors:

  1. Deep Vein Thrombosis (DVT): The most common source of PE, where blood clots form in the deep veins of the legs.

  2. Prolonged Immobility: Extended periods of sitting or lying down, such as during long flights or bed rest after surgery, can increase the risk of blood clots.

  3. Surgery: Certain surgical procedures, particularly those involving the legs, abdomen, or pelvis, can increase the risk of clot formation.

  4. Cancer: Some cancers and their treatments can increase the risk of clotting.

  5. Hormonal Factors: Hormone replacement therapy, birth control pills, or pregnancy can elevate the risk due to changes in blood clotting.

  6. Obesity: Excess body weight can contribute to the likelihood of developing DVT.

  7. Smoking: Tobacco use can damage blood vessels and increase clotting risk.

  8. Age: The risk of PE increases with age, particularly in individuals over 60.

  9. Genetic Conditions: Some people have inherited disorders that affect blood clotting, increasing their risk for DVT and PE.

  10. Chronic Diseases: Conditions such as heart disease, lung disease, and inflammatory bowel disease can increase the risk.

Preventive measures, such as staying active, using compression stockings, and following medical advice after surgeries, can help reduce the risk of pulmonary embolism.

How is a pulmonary embolism diagnosed?

A pulmonary embolism (PE) is diagnosed through a combination of clinical evaluation, imaging tests, and sometimes laboratory tests. Here are the common steps involved in the diagnosis:

1. Clinical Assessment: The vascular specialist will take a detailed medical history and perform a physical examination. Symptoms like sudden shortness of breath, chest pain, and coughing up blood are key indicators.

2. D-dimer Test: A blood test that measures the presence of D-dimer, a substance released when a blood clot dissolves. Elevated levels may suggest a clot, but they are not specific to PE.

3. Imaging Tests:

a. CT Pulmonary Angiography (CTPA): This is the most commonly used imaging test to confirm PE. It involves injecting a contrast dye into the blood vessels and taking detailed images of the lungs.

b. Ventilation-Perfusion (V/Q) Scan: This test uses radioactive material to examine airflow (ventilation) and blood flow (perfusion) in the lungs. It is used when CTPA is not suitable.

c. Ultrasound: Sometimes, an ultrasound of the legs is performed to check for deep vein thrombosis (DVT), which can lead to PE.

4. Chest X-ray: While not definitive for PE, it can help rule out other conditions and may show indirect signs of a clot.

5. Magnetic Resonance Imaging (MRI): Occasionally used in specific cases, especially in patients who cannot undergo CT scans.

6. Pulmonary Angiography: This is an invasive procedure and is less commonly used today but can definitively diagnose PE.

A combination of these tests helps in confirming the presence of a pulmonary embolism.

How is a PE treated?

The treatment of pulmonary embolism (PE) aims to prevent further clot formation, dissolve existing clots, and manage symptoms. The specific approach depends on the severity of the PE and the patient’s overall health. Here are the main treatment options:

  1. Anticoagulants (Blood Thinners):

    a. Heparin:     Often given intravenously or as a subcutaneous injection in the hospital to provide rapid anticoagulation.

    b. Warfarin: An oral anticoagulant used for long-term management, typically started after initial heparin therapy.

    c. Direct Oral Anticoagulants (DOACs): Medications like rivaroxaban, apixaban, and edoxaban, which can be used for both initial and long-term treatment.

  2. Thrombolytics (Clot Busters): These are used in more severe cases of PE where there is a significant risk of death or severe complications. Thrombolytics dissolve clots quickly and are typically administered in a hospital setting.

  3. Inferior Vena Cava (IVC) Filter: In patients who cannot take anticoagulants or have recurrent clots despite treatment, an IVC filter may be placed in the inferior vena cava to prevent clots from travelling to the lungs.

  4. Surgical Options:

    a. Embolectomy: In rare cases of massive PE, surgery may be performed to remove the clot directly from the pulmonary arteries. This is usually done as a keyhole procedure via the groin or neck veins and under X-ray guidance the clot is usually sucked out under local anaesthetic/sedation.

  5. Supportive Care: Oxygen therapy and respiratory support may be provided to manage symptoms and improve oxygenation.

  6. Long-term Management: Patients may need long-term anticoagulation therapy, especially if there is a high risk of recurrent clots. The duration of treatment varies based on individual risk factors but for first presentation is usually 3-6 months.

  7. Lifestyle Changes: Encouraging physical activity, maintaining a healthy weight, and avoiding prolonged immobility can help reduce the risk of future clots.

Prompt identification and treatment of PE are crucial to improve outcomes and reduce the risk of complications.

How do anticoagulants help in the treatment of PE?

Anticoagulants play a crucial role in the treatment of pulmonary embolism (PE) by preventing the formation of new blood clots and stopping the growth of existing ones. Here’s how they work:

  1. Inhibition of Coagulation Factors: Anticoagulants interfere with the body’s natural clotting process. They target specific proteins (coagulation factors) in the blood that are necessary for clot formation. By inhibiting these factors, anticoagulants help to prevent the clot from enlarging and reduce the risk of new clots forming.

  2. Prevention of Further Clot Formation: Once a PE occurs, the body is at increased risk for additional clots. Anticoagulants help to mitigate this risk by maintaining blood flow and reducing the likelihood of new clots forming in the veins, which could lead to further embolism.

  3. Facilitation of Natural Clot Breakdown: The body has a natural process for breaking down clots (fibrinolysis). By preventing new clot formation and allowing the body’s natural mechanisms to dissolve existing clots, anticoagulants can help decrease the size of the embolus over time

  4. Reduced Risk of Complications: By effectively managing the clotting process, anticoagulants can significantly lower the risk of serious complications associated with PE, such as chronic thromboembolic pulmonary hypertension (CTEPH) or recurrent embolism.

Anticoagulants are often used in conjunction with other treatments, such as thrombolytics in severe cases, to enhance the overall effectiveness of PE management. The choice of anticoagulant and the duration of treatment will depend on the specific circumstances of the patient, including the severity of the PE and any underlying health conditions.

The main indications for surgical intervention in cases of pulmonary embolism (PE) include:

  1. Massive Pulmonary Embolism: Surgical intervention is indicated when the embolism is massive and causes severe hemodynamic instability or cardiovascular collapse. This is a life-threatening situation requiring immediate action to restore blood flow.

  2. Failed Medical Therapy: If a patient does not respond to anticoagulant therapy or thrombolytics, and their condition deteriorates, surgery may be necessary. This is particularly relevant if the clot burden remains high despite treatment.

  3. Severe Hypotension or Shock: When a patient experiences significant drops in blood pressure or develops shock due to PE, surgical options may be warranted to quickly remove the clot and stabilize the patient.

  4. Chronic Thromboembolic Pulmonary Hypertension (CTEPH): In cases where chronic PE leads to persistent pulmonary hypertension, surgical procedures like pulmonary endarterectomy may be indicated to remove organized clots from the pulmonary arteries.

  5. Embolectomy: This surgical procedure involves the direct removal of the clot from the pulmonary arteries. It is typically considered for patients with massive PE or those who cannot receive thrombolytic therapy due to bleeding risks.

  6. Presence of Comorbid Conditions: In cases where other serious health conditions complicate the management of PE, surgical intervention may be necessary if other treatment options are insufficient.

The decision for surgical intervention is made on an individual basis, taking into account the patient’s overall health, specific circumstances of the PE, and the risks associated with surgery. A multidisciplinary approach is often employed to determine the most appropriate treatment strategy.

The prognosis of pulmonary embolism (PE) varies widely depending on several factors, including the severity of the embolism, the presence of underlying health conditions, the timeliness of diagnosis and treatment, and the patient’s overall health. Here are key points regarding the prognosis:

1. Severity of PE:

a. Massive PE: Patients with massive PE, which causes significant hemodynamic instability, have a higher risk of mortality. The prognosis can be poor without immediate intervention.

b. Submassive PE: Patients with submassive PE may have a better prognosis, but they still require careful monitoring and management.

2. Timeliness of Treatment: Early diagnosis and prompt treatment significantly improve outcomes. Patients who receive appropriate anticoagulation or thrombolytic therapy quickly tend to have better prognosis.

3. Underlying Health Conditions: The presence of comorbidities, such as heart disease, lung disease, obesity, or cancer, can negatively impact prognosis. Patients with multiple health issues may experience worse outcomes.

4. Recurrence Risk: After an initial PE, patients are at risk for recurrence, especially if they have risk factors for thrombosis. Long-term anticoagulation may be necessary to reduce this risk.

5. Long-term Complications: Some patients may develop chronic thromboembolic pulmonary hypertension (CTEPH) as a long-term complication of PE. This condition can lead to persistent pulmonary hypertension and may require surgical intervention.

6. Mortality Rates: The overall mortality rate for PE varies, with estimates ranging from 2% to 30%, depending on the severity and the patient’s condition. Massive PE has a higher mortality risk, while subsegmental PE often has a better prognosis.

7. Quality of Life: Many patients recover well after treatment for PE, especially with appropriate management. However, some may experience lingering symptoms or anxiety related to their diagnosis.

In summary, while the prognosis for pulmonary embolism can be serious, especially in severe cases, timely intervention and management can significantly improve outcomes. Regular follow-up and addressing risk factors are essential for long-term recovery and prevention of recurrence.

Fibroids shrinkage after UFE

Varicose veins screening package (single leg)

  • Consultation & Review – assess history, risk factors, life style, symptoms
  • Examination – to check distribution and anatomy plus to assess skin problem
  • Ultrasound reflux scan – to check for venous insufficiency (two legs add $450 + GST)
  • $588 + GST

Spider veins screening package (single leg)

  • Consultation & Review – assess history, risk factors, life style, symptoms
  • Examination – to check distribution and anatomy plus to assess skin problem
  • 1 session laser treatment – (additional session $450 + GST)
  • $588 + GST

Varicose veins and spider veins package (single leg)

  • Consultation & Review – assess history, risk factors, life style, symptoms
  • Examination – to check distribution and anatomy plus to assess skin problem
  • Ultrasound reflux scan – to check for venous insufficiency (two legs add $450 + GST)
  • 1 session spider vein laser treatment (additional session 450 + GST)
  • $988 + GST (two legs – add $400 + GST)

Diabetic foot screening (basic)

  • Consultation & Review – assess history, risk factors, life style, symptoms
  • Examination – to check circulation, biomechanics of foot arch, sensory loss
  • Ankle brachial pressure index (lab) – to check blood flow in legs
  • Blood test – to check average sugar levels in 3 months
  • $388 + GST

Diabetic foot screening (extensive)

  • Consultation & Review – assess history, risk factors, life style, symptoms
  • Examination – to check circulation, biomechanics of foot arch, sensory loss
  • Ankle brachial pressure index (lab) – to check blood flow in legs
  • Blood test – to check average sugar levels in 3 months
  • Single leg arterial duplex – to identify specific artery problem (additional leg scan $400 + GST)
  • X-ray one foot – to check bone infection
  • $888 + GST

Cardiovascular screening (normal)

  • Consultation & Review – assess history, risk factors, life style, symptoms
  • Examination – full cardiovascular examination including the heart and limb arteries
  • Ankle brachial pressure index (lab) – this is a marker for longevity and cardiovascular health
  • Blood tests (lipids) – to check all the types of cholesterol
  • Carotid scan – to identify block artery to the brain hence stroke
  • Echocardiogram – to identify heart muscle function
  • $1098 + GST

Cardiovascular screening (comprehensive)

  • Consultation & Review – assess history, risk factors, life style, symptoms
  • Examination – full cardiovascular examination including the heart and limb arteries
  • Ankle brachial pressure index (lab) – this is a marker for longevity and cardiovascular health
  • Blood tests (lipids) – to check all the types of cholesterol
  • Carotid scan – to identify block artery to the brain hence stroke
  • CT coronary Angiogram plus calcium score – gold standard to identify block heart arteries
  • $2098 + GST