Thrombectomy & Thrombolysis

The aim is to clear an abnormal clot and restore circulation before irreversible damage occurs. In arterial occlusion this protects the limb or organ; in major venous thrombosis it relieves obstruction; in dialysis access it preserves the patient's lifeline for treatment. Because these are frequently emergencies, the decision often balances the danger of the clot against the risks of intervention within hours rather than weeks.

Mechanical thrombectomy

A catheter device aspirates, fragments or extracts the clot. It can restore flow quickly and may reduce the dose of clot-dissolving medication required.

Surgical thrombectomy or embolectomy

Clot is removed through a small incision in the artery or vein. The surgeon can also repair a narrowing, an aneurysm or a blocked bypass graft at the same operation.

When treatment is used

• Acute limb ischaemia: treated with thrombectomy, thrombolysis, angioplasty, stenting or bypass; urgency depends on the severity of sensory and motor changes.
• Extensive DVT: selected patients with severe iliofemoral DVT may benefit from clot removal to relieve symptoms and reduce obstruction; anticoagulation remains essential.
• Dialysis access thrombosis: a clotted fistula or graft is treated by thrombectomy combined with fistuloplasty of the narrowing that caused it to fail.

Bleeding risk is a key selection factor. Thrombolysis is unsuitable for some patients, including those with recent surgery, active bleeding or previous intracranial haemorrhage.

Assessment is often urgent and covers symptom duration, limb or organ viability, bleeding history, current medications and imaging. How quickly flow must be restored drives the choice of technique. Tell the team about every blood thinner and supplement you take; in an emergency there is little time to adjust them, so accuracy matters.

Catheter-directed thrombolysis

A catheter positioned within the clot delivers thrombolytic medication over several hours. Repeat imaging tracks progress and identifies any underlying narrowing that needs treatment.

Mechanical thrombectomy extracts clot through a catheter or a small open incision. The two approaches are often combined, and angioplasty, stenting or bypass may be added to correct the underlying cause found once the clot is cleared. Anaesthesia depends on the technique and the patient's condition.

Patients are monitored closely for bleeding, recurrent thrombosis and reperfusion effects after flow is restored. Anticoagulant or antiplatelet medication is usually required, and follow-up concentrates on the underlying cause, vessel patency and preventing another clot. Further imaging confirms that the treated vessel remains open.

• Major bleeding, including intracranial haemorrhage with thrombolysis
• Embolisation of clot fragments
• Vessel injury
• Kidney injury from contrast
• Compartment syndrome after reperfusion
• Recurrent thrombosis
• Failure to salvage threatened tissue despite treatment

These risks are always weighed against the substantial danger of leaving the clot untreated.

Not every blood clot requires removal. Anticoagulation alone may be appropriate when tissue is not threatened and the body can safely stabilise and remodel the clot. Open surgery, bypass or another reconstructive procedure may be preferred when the blockage is extensive, the anatomy is unsuitable for catheter treatment or a durable correction of underlying disease is needed.

The decision between thrombectomy, thrombolysis and surgery depends on the clot's location, age and cause, the urgency of restoring flow and the patient's bleeding risk. Thrombolysis works over time and may not be suitable when the limb or organ is immediately threatened, while mechanical clot removal may still need to be combined with angioplasty, stenting or surgical repair.

Recurrence is possible if an underlying narrowing, aneurysm, heart rhythm problem or clotting tendency remains. Follow-up therefore focuses on both the treated vessel and the cause of the event. Patients should understand the medication plan, the surveillance schedule and the symptoms that would indicate recurrent blockage, bleeding or another emergency.

Yarra Vascular Surgeons offers mechanical, catheter-directed and open clot-removal techniques, supported by angioplasty, stenting and surgical reconstruction where required, with treatment tailored to clot age, location, tissue threat and bleeding risk.

Thrombectomy and thrombolysis are time-sensitive treatments. If you have sudden severe limb pain, coldness or loss of movement, call Triple Zero (000). For non-emergency assessment of clotting problems, grafts or dialysis access, contact our rooms.