DVT Thrombolysis & Thrombectomy

What are thrombolysis and thrombectomy?

Most deep vein thrombosis is treated with anticoagulation — blood thinners — and that remains the foundation. But blood thinners stop clot growing; they do not remove it. For extensive clot in the iliofemoral veins (pelvis and thigh), catheter-based techniques can clear it directly: thrombolysis infuses a clot-dissolving medicine through a catheter positioned inside the clot, and mechanical thrombectomy physically extracts it. The two are often combined in one sitting.

Who it may suit

Clot removal is considered for severe iliofemoral DVT with marked swelling and pain — especially in younger, active patients presenting early — and urgently for the rare limb-threatening form (phlegmasia). The rationale is the aftermath: extensive clot that organises in the vein can leave permanent obstruction and valve damage, the post-thrombotic syndrome of chronic swelling, heaviness and skin change. Clearing clot early aims to reduce that risk in selected patients; the evidence supports careful selection rather than routine use, and I am direct about that distinction.

What the procedure involves

• Performed through a small puncture, usually behind the knee, under local anaesthesia with sedation
• Clot is dissolved, extracted or both, under X-ray guidance
• An underlying iliac vein narrowing uncovered by the clot clearance — common on the left side — may need venoplasty and stenting at the same sitting to stop the clot re-forming
• Anticoagulation continues afterwards as it would for any DVT

What to expect afterwards

Swelling usually improves quickly once flow is restored. Bleeding is the principal risk of any thrombolytic medicine, which is why patient selection screens for it; re-thrombosis, and the standard risks of venous intervention, are uncommon but recognised. Compression stockings and early walking are part of recovery.

Is it right for me?

Timing is everything — these techniques work best on fresh clot, within the first days to two weeks. If you have a swollen, painful leg and a confirmed or suspected DVT, assessment should be prompt; the scan and the treatment window are both time-sensitive.