Deep Vein Thrombosis
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Deep Vein Thrombosis (DVT) in Melbourne
Deep vein thrombosis (DVT) occurs when a blood clot forms in a deep vein, most commonly in the leg. Symptoms may include swelling, pain, tenderness, warmth or skin discolouration, although some people have no obvious symptoms.
DVT can be serious because part of the clot may travel to the lungs and cause a pulmonary embolism. Suspected DVT requires immediate medical assessment and should not wait for a routine vein clinic appointment.
If you experience chest pain, sudden breathlessness, coughing up blood, fainting or collapse, call 000 immediately for emergency assistance.
This page explains the symptoms, causes, diagnosis, treatment and possible complications of DVT to help patients understand when urgent medical care is needed.
Understanding Deep Vein Thrombosis
Deep vein thrombosis occurs when a clot develops within the deep venous system. It differs from superficial vein thrombosis, which involves a clot in a vein closer to the skin’s surface.
Although these are different conditions, some superficial clots may extend into the deep venous system or occur alongside DVT. Clinical assessment and appropriate investigations are important when symptoms suggest a blood clot.
DVT can occur with or without visible varicose veins. Risk depends on several factors, including recent surgery, prolonged immobility, pregnancy, certain medical conditions and a personal history of blood clots.
Deep vein thrombosis differs from varicose veins, which affect superficial veins and may be associated with venous reflux. Having visible varicose veins does not necessarily mean a person has DVT.
What Causes Deep Vein Thrombosis
DVT can develop when blood flow in the deep veins slows, a blood vessel is injured or the blood becomes more likely to clot.
Factors that may increase the risk include:
Recent surgery, injury or hospitalisation
Prolonged immobility or bed rest
Long-distance travel involving extended periods of sitting
Previous DVT or pulmonary embolism
Pregnancy and the period after childbirth
Oestrogen-containing medicines, including some contraceptives and hormone therapies
Certain cancers and medical conditions
Inherited or acquired blood-clotting disorders
Increasing age, excess body weight and smoking
Not everyone with these risk factors develops DVT, and some people experience DVT without an obvious trigger.
What Are the Symptoms of Deep Vein Thrombosis?
DVT symptoms may develop suddenly or gradually. Common signs include:
Swelling in one leg, particularly around the calf or thigh
Pain, aching or tenderness in the affected leg
Warmth around the painful or swollen area
Redness or changes in skin colour
Increased discomfort when standing or walking
Some people have no noticeable symptoms. DVT cannot be reliably diagnosed or ruled out from symptoms alone.
When to Seek Immediate Medical Assessment
Seek medical assessment immediately if you develop new one-sided leg swelling, unexplained calf pain, warmth or redness, particularly if you have recently undergone surgery, travelled for a long period or have other clotting risk factors.
Do not wait for a routine vein clinic appointment.
When to Call 000
Call 000 immediately if you experience:
Sudden shortness of breath
Chest pain
Coughing up blood
Fainting or collapse
These may be signs of a pulmonary embolism, which requires emergency medical care.
How Is Deep Vein Thrombosis Diagnosed?
A clinician assesses possible DVT by reviewing symptoms, medical history, risk factors and physical findings.
Investigations may include:
D-dimer blood test: This measures a substance associated with blood clot breakdown. The result is interpreted alongside clinical risk assessment and cannot independently confirm or exclude DVT in every situation.
Compression duplex ultrasound: This is commonly used to examine the deep veins and assess whether a blood clot is present.
Additional imaging: Further tests may be recommended in selected circumstances when ultrasound findings are inconclusive or a clot is suspected in veins that are more difficult to assess.
The appropriate diagnostic pathway depends on individual circumstances. If DVT is suspected, investigations should be arranged promptly through an appropriate medical service.
Learn more about vascular ultrasound and mapping and its role in assessing blood flow and venous conditions.
How Is Deep Vein Thrombosis Treated?
Treatment for confirmed DVT depends on the location and extent of the clot, the person’s medical history, bleeding risk and other clinical factors.
Anticoagulant medicines are commonly used to help prevent a clot from growing and reduce the risk of further blood clots. The type of medication and duration of treatment are determined by the treating clinician.
In selected cases, specialised treatments such as thrombolysis or clot-removal procedures may be considered. These are not routine treatments for every patient with DVT.
Compression stockings may be recommended for some patients to manage symptoms, but they are not a substitute for anticoagulant treatment when it is indicated.
Patients should follow the treatment and follow-up plan provided by their medical team. Do not start, stop or change prescribed anticoagulant medicines without medical advice.
What Are the Possible Complications of DVT?
One of the most serious complications of DVT is pulmonary embolism, which occurs when part of a blood clot travels to the lungs.
Some people may also develop post-thrombotic syndrome after DVT. This can cause ongoing leg swelling, discomfort, skin discolouration and, in more severe cases, venous leg ulcers.
The likelihood of complications varies according to individual risk factors and the circumstances of the clot. Timely diagnosis, appropriate treatment and follow-up are important.
How Is Deep Vein Thrombosis Managed, and Can the Risk Be Reduced?
Managing deep vein thrombosis (DVT) involves appropriate medical treatment, follow-up care and assessment of individual risk factors. Treatment may include anticoagulant medication and other interventions where clinically indicated.
Although not all cases of DVT can be prevented, certain measures may help reduce the risk:
Stay physically active: Regular movement helps support circulation, particularly during extended periods of sitting.
Avoid prolonged immobility: Take movement breaks during long journeys or periods of extended sitting.
Follow medical advice: People at increased risk of blood clots may require prescribed preventive medication or other measures.
Manage relevant risk factors: Smoking cessation, weight management and appropriate management of underlying medical conditions may help reduce risk.
These measures do not guarantee prevention and are not substitutes for medical treatment.
Suspected DVT requires immediate medical assessment. If chest pain, sudden breathlessness, coughing up blood, fainting or collapse occurs, call 000 immediately.
DVT Patient Resources and Support
People diagnosed with deep vein thrombosis may need ongoing medical follow-up, advice about anticoagulant medicines and information about reducing their individual risk of further blood clots.
For independent Australian medical information, visit Healthdirect Australia — Deep Vein Thrombosis.
Follow the treatment and review schedule provided by your medical team. Do not stop or change prescribed anticoagulant medicines without medical advice.
DVT Information and Vein Care in Melbourne
Deep vein thrombosis requires timely medical assessment and an appropriate treatment plan.
If you suspect a blood clot, seek immediate medical assessment rather than waiting for a routine Vein Care appointment. If you develop chest pain, sudden breathlessness, coughing up blood or collapse, call 000.
For non-urgent concerns about varicose veins, chronic venous symptoms or follow-up vein assessment, Vein Care provides information and appointments at its Melbourne clinic locations.
Frequently Asked Questions
The first signs of deep vein thrombosis (DVT) may include swelling, pain, tenderness, warmth or redness in one leg, particularly around the calf or thigh. Symptoms may develop suddenly or gradually, and some people experience no noticeable symptoms.
If you develop unexplained one-sided leg swelling or pain, seek immediate medical assessment rather than waiting for a routine vein clinic appointment.
A clinician assesses suspected DVT by reviewing symptoms, medical history, risk factors and physical findings.
Compression duplex ultrasound is commonly used to examine the deep veins and check for blood clots. A D-dimer blood test may also be used as part of the diagnostic process, depending on the patient's clinical risk.
A D-dimer result cannot independently confirm or rule out DVT in every situation. Further imaging may be required when clinically indicated.
Deep vein thrombosis occurs when a blood clot forms in a deep vein, usually in the leg. It can be serious because part of the clot may travel to the lungs and cause a pulmonary embolism.
Superficial vein thrombosis occurs in veins closer to the skin's surface and may cause localised pain, redness, tenderness or a firm area along the affected vein.
Although these conditions are different, superficial vein thrombosis can sometimes extend into deeper veins or occur alongside DVT. Medical assessment may be required to determine the extent of the clot and appropriate management.
Treatment for DVT commonly involves anticoagulant medicines, also called blood thinners. These medicines help prevent existing clots from growing and reduce the risk of additional blood clots.
Treatment depends on the location and extent of the clot, medical history, bleeding risk and other individual factors. In selected cases, specialised procedures may be considered.
DVT treatment should be managed through an appropriate medical service. Routine varicose vein procedures are not substitutes for acute DVT treatment.
Not every case of DVT can be prevented, but certain measures may help reduce the risk.
Regular movement, avoiding prolonged immobility, maintaining a healthy weight and following medical advice may be beneficial. During long journeys, taking movement breaks and moving the legs regularly may help support circulation.
People at higher risk, including those recovering from surgery or with a previous history of blood clots, may require clinician-prescribed preventive measures.
These steps do not guarantee prevention, and suspected DVT requires immediate medical assessment.
Call 000 immediately if you experience sudden breathlessness, chest pain, coughing up blood, fainting or collapse.
These symptoms may indicate a pulmonary embolism, a potentially life-threatening complication of deep vein thrombosis.
Do not wait for a routine appointment or attempt to manage these symptoms at home.
If you develop unexplained swelling, pain, warmth or redness in one leg without these emergency symptoms, seek immediate medical assessment for possible DVT.
