Mechanical Thrombectomy
Learn about Mechanical Thrombectomy for acute ischaemic stroke in Singapore, including how clot retrieval works, who may benefit and what to expect from specialist neurointerventional care provided by Dr. Manish Taneja at the Supreme Vascular and Interventional Clinic.
Mechanical Thrombectomy for Stroke in Singapore
Minimally Invasive Clot Removal for Selected Acute Ischaemic Strokes
A mechanical thrombectomy is a minimally invasive procedure used to remove a blood clot blocking a major artery in the brain during selected acute ischaemic strokes.
An ischaemic stroke occurs when a blood vessel supplying the brain becomes blocked, reducing blood flow and oxygen to brain tissue. Rapid assessment and treatment are critical because prolonged interruption of blood flow can result in permanent brain injury.
During mechanical thrombectomy, a specialist guides a thin catheter through the blood vessels to the blocked artery and uses specialised devices to remove the clot and restore blood flow to the brain.
At the Supreme Vascular and Interventional Clinic, neurointerventional care is led by Dr. Manish Taneja, a dual-trained neurointerventional and peripheral vascular intervention specialist with expertise in minimally invasive treatments affecting both the brain and body.
Our approach extends beyond the procedure itself. Where appropriate, patients benefit from specialist assessment, detailed imaging review, treatment planning and ongoing follow-up as part of a continuum of care under one roof with our specialized clinic in Singapore.
If you or someone around you develops sudden facial drooping, arm weakness, speech difficulty or other possible stroke symptoms, seek emergency medical attention immediately. Mechanical thrombectomy is an emergency hospital treatment and is not something that should be delayed while arranging a clinic appointment.
Treatment Overview
| Treatment Type | Minimally invasive endovascular procedure |
|---|---|
| Also Known As | endovascular thrombectomy, clot retrieval, percutaneous mechanical thrombectomy, endovascular thrombectomy, catheter-based clot removal |
| Used for | Selected acute ischaemic strokes caused by a major blood vessel blockage |
| Specialty | Neurointervention |
| Treatment goal | Remove the blood clot and restore blood flow to the brain |
| How it works | A catheter is guided to the blocked artery and a specialised device removes the clot |
| Procedure Access | Catheter inserted through the wrist or groin |
| Anaesthesia | Depends on the individual patient and clinical circumstances |
| Timing | Treatment is time-sensitive and depends on clinical assessment and imaging |
| Follow-Up | Stroke monitoring, medical management and rehabilitation may be required |
| Performed By | Dr Manish Taneja, dual-trained neurointerventional and peripheral vascular intervention specialist |
What Is Mechanical Thrombectomy?
Mechanical thrombectomy is an endovascular procedure used to remove a blood clot from a blocked artery supplying the brain.
It is primarily used for selected patients with acute ischaemic stroke caused by a large-vessel blockage. Whether thrombectomy is appropriate depends on factors including the patient's symptoms, the location of the blockage, the extent of established brain injury and the results of brain and blood vessel imaging.
The procedure is performed by guiding a catheter through the blood vessels to the site of the blockage. A specialised device is then used to capture and remove the clot, allowing blood to flow through the previously blocked artery.
Mechanical thrombectomy is different from treatment for haemorrhagic stroke, where bleeding occurs within or around the brain rather than a blood clot blocking an artery.
How Does Mechanical Thrombectomy Work?
Removing the Blood Clot and Restoring Blood Flow
Mechanical thrombectomy begins with rapid assessment and brain imaging to determine whether the stroke is caused by a blood vessel blockage and whether the patient may benefit from endovascular treatment. CT or MRI and vascular imaging may be used to assess the location and extent of the stroke and blood vessel blockage.
Once mechanical thrombectomy is considered appropriate, a thin catheter is guided through the blood vessels towards the blocked artery in the brain.
A specialised clot-retrieval device, such as a stent retriever, may be used to engage and remove the clot, while aspiration techniques may also be used to help remove the blockage.
Once the clot has been removed, blood flow through the affected artery is assessed using imaging to determine whether circulation has been successfully restored.
The aim is to restore blood flow as quickly and safely as possible, helping preserve brain tissue that may still be recoverable.
It is important to remember: One key difference is unlike medicines that dissolve blood clots, mechanical thrombectomy physically removes the clot from the blocked brain artery using minimally invasive endovascular techniques.
When Might Mechanical Thrombectomy Be Recommended?
Mechanical thrombectomy may be considered for selected patients experiencing an acute ischaemic stroke caused by a blockage in a major artery supplying the brain.
Treatment decisions depend on several factors, including:
- The type of stroke
- The location of the blocked blood vessel
- The severity and pattern of neurological symptoms
- Brain and blood vessel imaging
- The amount of brain tissue that may still be salvageable
- When the patient was last known to be well
- The patient's overall medical condition
Mechanical thrombectomy is a leading treatment for large vessel occlusion (LVO) and medium vessel occlusion (MVO) strokes. It is a minimally invasive procedure widely used and very effective to remove blood clots and restore blood flow to the brain in order to treat ischemic strokes. Not every patient with an ischaemic stroke will be suitable for mechanical thrombectomy.
Because stroke treatment is time-sensitive, patients with suspected stroke should receive emergency assessment immediately.
Mechanical Thrombectomy for Selected Peripheral Arterial Occlusions
Mechanical thrombectomy may also be considered in selected patients with an acute blockage of a peripheral artery caused by blood clot. This can occur in patients with underlying peripheral arterial disease (PAD), particularly when an acute clot develops within or on top of a diseased artery and causes a sudden reduction in blood flow.
Using a catheter-based approach, specialised devices can be used to remove the clot and help restore blood flow to the affected limb. Depending on the underlying arterial disease, additional treatment such as angioplasty or stenting may also be considered.
Mechanical thrombectomy is not a routine treatment for all patients with peripheral arterial disease. The appropriate approach depends on whether the blockage is caused by acute clot, underlying arterial narrowing or a combination of both.
Mechanical Thrombectomy for Selected Cases of Cerebral Venous Thrombosis
Mechanical thrombectomy is most commonly associated with the treatment of acute ischaemic stroke, where a catheter-based procedure is used to remove a blood clot blocking an artery in the brain.
In selected and severe cases of cerebral venous thrombosis (CVT), catheter-based clot removal may also be considered. This may be relevant when a patient has significant or worsening symptoms despite appropriate medical treatment, although most patients with CVT are managed primarily with anticoagulant medication.
The technique and treatment approach for cerebral venous thrombosis differ from those used for arterial stroke. The decision to consider mechanical thrombectomy or another catheter-based intervention depends on the location and extent of the clot, the patient's clinical condition and the presence of complications.
Why Is Rapid Assessment So Important?
Every Minute Matters in Acute Stroke
When a major brain artery becomes blocked, part of the brain may be deprived of oxygen and nutrients.
Rapid assessment helps doctors determine:
- Whether the symptoms are caused by a stroke.
- Whether the stroke is ischaemic or haemorrhagic.
- Where the blood vessel blockage is located.
- How much brain tissue may still be recoverable.
- Whether mechanical thrombectomy or another treatment may be appropriate.
Brain imaging is an important part of this decision-making process, with CT or MRI used to identify the stroke and vascular imaging used to assess blood vessel involvement.
Mechanical Thrombectomy vs Clot-Dissolving Medication
Understanding Treatment Options for Acute Ischaemic Stroke
For some patients with acute ischaemic stroke, medication may be used to dissolve a blood clot, while mechanical thrombectomy physically removes a clot from a blocked brain artery.
In selected patients with a major blood vessel blockage, mechanical thrombectomy may be considered when imaging and clinical assessment indicate that removing the clot could restore blood flow and help preserve brain tissue.
Depending on the patient's circumstances, clot-dissolving medication and mechanical thrombectomy may sometimes be used together rather than as alternatives.
The appropriate treatment depends on factors including the type and location of the blockage, timing, brain imaging, medical history and overall clinical condition.
Why Might Mechanical Thrombectomy Be Recommended?
Treating Selected Large-Vessel Strokes
Mechanical thrombectomy is primarily considered when an acute ischaemic stroke is caused by a blockage in a major blood vessel supplying the brain.
Your treating team will assess:
- The location of the blocked artery
- The severity of your neurological symptoms
- Brain and blood vessel imaging
- The amount of potentially recoverable brain tissue
- When you were last known to be well
- Your overall medical condition
The decision to perform thrombectomy is made urgently because restoring blood flow as quickly as possible can be critical in acute stroke.
Potential Benefits of Mechanical Thrombectomy
Restoring Blood Flow to the Brain
For appropriately selected patients, mechanical thrombectomy can rapidly remove a major blood vessel blockage and restore blood flow to areas of the brain affected by the stroke. Mechanical Thrombectomy is a relatively safe and effective procedure.
Potential benefits may include:
Rapid Clot Removal
The procedure physically removes the blood clot rather than relying solely on medication to dissolve it.
Restored Blood Flow
Removing the blockage can reopen the affected artery and restore circulation to the brain.
Minimally Invasive Treatment
Thrombectomy is far less invasive. The clot can be treated through the blood vessels using catheter-based techniques rather than open brain surgery. Thombectomy is straightforward and recovery is pretty quick.
Reduce Several Risks
Thrombectomy can reduce the risk of severe disability, loss of limbs, and death.
Potentially Better Functional Outcomes
For appropriately selected patients, timely thrombectomy can improve the chance of functional recovery following certain large-vessel ischaemic strokes.
Limit Damage
Thrombectomy can limit damage and loss of bodily functions by restoring blood flow as quickly as possible.
Important Reminder: Every stroke is different. Whether mechanical thrombectomy is appropriate depends on urgent clinical assessment, brain imaging, blood vessel findings and the patient's individual circumstances.
What Are the Potential Risks and Limitations?
Understanding the Risks of Stroke Treatment
Mechanical thrombectomy is an advanced emergency procedure, but like all medical procedures it carries potential risks.
Potential risks may include:
- Bleeding or bruising at the catheter access site
- Blood vessel injury
- Reaction to contrast dye
- Incomplete removal or recurrence of the blood clot
The risks and potential benefits depend on the severity and location of the stroke, the patient's medical condition and the findings on brain and blood vessel imaging.
The stroke itself may also cause significant neurological injury, which is why rapid assessment and treatment are essential.
Your Mechanical Thrombectomy Treatment Journey
| Step | Stage | Description |
|---|---|---|
| 1 | Emergency Stroke Assessment | Your symptoms and neurological condition are assessed urgently by the stroke team. |
| 2 | Brain and Blood Vessel Imaging | Imaging identifies the type, location and severity of the stroke. |
| 3 | Treatment Decision | Your medical team determines whether mechanical thrombectomy is appropriate. |
| 4 | Clot Removal Procedure | A catheter and specialised device are used to remove the blood clot. |
| 5 | Blood Flow Assessment | Imaging confirms whether blood flow has been successfully restored. |
| 6 | Stroke Recovery & Monitoring | Your recovery is monitored with appropriate medical care and rehabilitation support. |
| 7 | Ongoing Follow-Up | Follow-up care addresses recovery, stroke prevention and your longer-term health. |
Recovery After Mechanical Thrombectomy
What Happens After the Clot Is Removed?
After mechanical thrombectomy, you will be closely monitored to assess your neurological condition, blood pressure and recovery.
Your hospital team may monitor:
- Neurological function and stroke symptoms
- Blood pressure and heart rate
- The catheter access site
- Brain imaging where clinically required
- Any complications following treatment
Recovery varies considerably between patients and depends on the severity and location of the stroke, the extent of brain injury and how quickly blood flow was restored.
Some patients may experience significant improvement after blood flow is restored, while others may require longer-term rehabilitation.
Rehabilitation and Recovery
Depending on your needs, rehabilitation may include:
- Physiotherapy
- Occupational therapy
- Speech and language therapy
- Swallowing assessment
- Support with returning to everyday activities
Your recovery plan will be tailored to your neurological condition and individual needs.
Follow-Up and Stroke Prevention
Ongoing medical care is important after stroke to reduce the risk of another event and address underlying risk factors. Follow-up may include medication management, cardiovascular assessment, lifestyle recommendations, rehabilitation and further specialist review where appropriate.
Follow-up appointments typically include reviewing brain imaging, identifying the underlying cause of the stroke, discussing medications, monitoring recovery and developing a personalised long-term prevention plan. Patients and families also have the opportunity to ask questions and better understand recovery expectations.
It is important to remember: Recovery from stroke is individual. Mechanical thrombectomy can restore blood flow, but the extent of neurological recovery depends on the individual stroke and the brain tissue affected.
Why Choose the Supreme Vascular and Interventional Clinic for Neurointerventional Care?
Specialist Brain-to-Body Vascular Expertise
Mechanical thrombectomy requires specialised knowledge of the brain's blood vessels, advanced imaging and precise endovascular techniques.
At the Supreme Vascular and Interventional Clinic, neurointerventional care is led by Dr Manish Taneja, a dual-trained neurointerventional and peripheral vascular intervention specialist with extensive experience in catheter-based vascular procedures.
Brain-to-Body Expertise
Dr Taneja's expertise spans vascular conditions affecting both the brain and the rest of the body, providing a broader understanding of vascular disease and minimally invasive treatment.
Specialist-Led Care
Your assessment, imaging review and treatment planning are guided by a specialist with dedicated expertise in neurointerventional procedures.
Minimally Invasive Techniques
Mechanical thrombectomy removes the blood clot through the blood vessels using specialised catheters and devices, without open brain surgery.
Advanced Image-Guided Treatment
Detailed brain and blood vessel imaging helps guide treatment decisions and precise catheter-based intervention.
Continuum of Care
Where appropriate, our specialized clinic provides continuity from specialist assessment and treatment planning through follow-up care, supporting patients throughout their vascular treatment journey.
For suspected acute stroke, emergency hospital assessment should always take priority. Mechanical thrombectomy is a time-sensitive treatment and should not be delayed.
Frequently Asked Questions About Mechanical Thrombectomy
Who may be suitable for mechanical thrombectomy?
Mechanical thrombectomy may be considered for selected patients with an acute ischaemic stroke caused by a major blood vessel blockage. Eligibility depends on clinical assessment, brain and blood vessel imaging, timing and the patient's overall condition.
Patients with large vessel occlusions (LVOs) and medium vessel occlusions (MVOs) and individuals who arrive within a certain window of time after stroke onset qualify for thrombectomy.
How quickly does mechanical thrombectomy need to be performed?
Mechanical thrombectomy is time-sensitive, and patients should receive urgent assessment as soon as stroke symptoms develop. The appropriate treatment window depends on individual clinical and imaging findings.
When a stroke is diagnosed within 4.5 hours of onset of symptoms, the main treatment is intravenous thrombolysis “clot-busting” medication such as tissue plasminogen activator (tPA). However, studies show this only works to dissolve the clot in about 1 out of 3 patients.
Mechanical thrombectomy was introduced as a treatment to physically remove the clot in patients who don’t respond to thrombolysis drugs alone. It has been a revolutionary advancement, demonstrating superior outcomes compared to medication by itself.
It can be initiated (groin or wrist area puncture) within 6-24 hours of time last known well. The sooner the better.
Is mechanical thrombectomy the same as clot-busting medication?
No. Clot-busting medication works by dissolving a blood clot, while mechanical thrombectomy uses specialised endovascular devices to physically remove the clot. In some patients, both treatments may be used.
Does mechanical thrombectomy require open brain surgery?
No. Mechanical thrombectomy is performed through the blood vessels using a catheter and specialised clot-removal devices, without opening the skull.
How is it determined whether thrombectomy is appropriate?
Doctors assess the patient's neurological symptoms, timing, brain imaging and blood vessel imaging to determine whether a major artery is blocked and whether thrombectomy may benefit the patient.
What happens after mechanical thrombectomy?
Patients are closely monitored following treatment, with neurological assessment and other medical care as required. Recovery may include rehabilitation depending on the effects of the stroke.
Can someone fully recover after mechanical thrombectomy?
Recovery varies between individuals and depends on several factors. During recovery, it’s essential to partake in ongoing stroke prevention measures. Individuals will need to monitor blood pressure to make sure it’s stable.
Mechanical Thrombectomy is a relatively safe and effective procedure. While it is straightforward and recovery is pretty quick, recovery time will depend on the patient’s particular situation. Some patients improve significantly, while others require longer-term rehabilitation. Recovery involves physical and occupational therapy to regain strength and skills impacted by the stroke.
Is mechanical thrombectomy used for haemorrhagic stroke?
No. Mechanical thrombectomy is used for selected acute ischaemic strokes caused by blood vessel blockage. Haemorrhagic stroke involves bleeding in or around the brain and requires a different treatment approach.
Where is mechanical thrombectomy performed?
Mechanical thrombectomy is an emergency hospital procedure requiring specialised stroke and neurointerventional facilities. Patients with suspected stroke should seek emergency medical attention immediately.
Specialist Neurointerventional Assessment in Singapore
Mechanical thrombectomy is an emergency treatment and suspected stroke requires immediate hospital assessment. For patients requiring specialist neurointerventional evaluation or follow-up, Dr. Manish Taneja provides expertise in minimally invasive treatments affecting the brain and wider vascular system.
At the Supreme Vascular and Interventional Clinic, our approach combines specialist assessment, advanced imaging, personalised treatment planning and continuity of care across the vascular treatment journey.
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