DAVF Embolisation
Learn about DAVF embolisation in Singapore, a minimally invasive treatment for selected dural arteriovenous fistulas provided by Dr. Manish Taneja at the Supreme Vascular and Interventional Clinic. Understand how it works, risks, recovery and specialist care
DAVF Embolisation in Singapore
Minimally Invasive Treatment for Selected Dural Arteriovenous Fistulas
DAVF embolisation is a minimally invasive neurointerventional procedure used to treat selected patients with a dural arteriovenous fistula (DAVF).
A DAVF is an abnormal connection between arteries and veins within the dura, the protective covering surrounding the brain and spinal cord. Unlike a typical brain AVM, a DAVF is an abnormal connection that develops within the dural vascular system. Depending on its location and blood flow pattern, a DAVF may cause symptoms such as headaches, pulsatile tinnitus, visual symptoms, neurological problems or, in some cases, bleeding within or around the brain.
During DAVF embolisation, a specialist guides a thin catheter through the blood vessels to the abnormal connection. Specialised embolic material is then delivered to selected vessels to block the abnormal blood flow.
At the Supreme Vascular and Interventional Clinic, neurointerventional treatment is led by Dr. Manish Taneja, a dual-trained neurointerventional and peripheral vascular intervention specialist.
With expertise spanning the brain and body, our specialized clinic provides specialist-led vascular and neurointerventional assessment, minimally invasive treatment and continuity of care under one roof.
Treatment Overview
| Treatment Type | Minimally invasive endovascular procedure |
|---|---|
| Also Known As | Dural arteriovenous fistula embolization, dural AV fistula embolisation |
| Used for | Selected dural arteriovenous fistulas |
| Specialty | Neurointerventional treatment |
| Treatment goal | Block or significantly reduce abnormal blood flow through the DAVF |
| How it works | A catheter delivers specialised embolic material to selected vessels forming the abnormal connection |
| Procedure Access | Catheter inserted through the wrist or groin |
| Anaesthesia | Depends on the individual procedure and clinical circumstances |
| Follow-Up | Neurological review and vascular imaging may be recommended |
| Performed By | Dr Manish Taneja, dual-trained neurointerventional and peripheral vascular intervention specialist |
What Is a Dural Arteriovenous Fistula?
A dural arteriovenous fistula (DAVF) is an abnormal connection between arteries and veins located within the dura, the protective covering surrounding the brain and spinal cord.
Normally, arteries and veins are connected through a network of smaller blood vessels that regulates blood flow.
With a DAVF, abnormal connections develop between arteries and veins within the dural vascular system. The effect of a DAVF depends on where it is located and how blood drains from the abnormal connection.
Some DAVFs may cause relatively mild symptoms, while others can create abnormal venous pressure or drainage patterns that increase the risk of neurological complications or bleeding.
Detailed brain and blood vessel imaging is therefore important when assessing a suspected DAVF.
What Is DAVF Embolisation?
DAVF embolisation is a catheter-based treatment that blocks or significantly reduces abnormal blood flow through a dural arteriovenous fistula. A thin catheter is guided through the blood vessels towards the DAVF using detailed imaging.
Specialised embolic material is then delivered through the catheter to selected vessels forming the abnormal connection. The goal is to close the abnormal connection and restore a more normal pattern of blood flow.
Depending on the DAVF's location and vascular anatomy, treatment may be performed from the arterial side, venous side or through a combination of approaches.
Some DAVFs can be treated successfully with embolisation alone, while others may require additional treatment.
How Does DAVF Embolisation Work?
Closing the Abnormal Vascular Connection
Before treatment, detailed imaging is used to map the DAVF, identify its feeding arteries and understand how blood drains from the abnormal connection. During the procedure, a thin catheter is carefully inserted (in the groin or wrist) and guided through the blood vessels towards the DAVF. Specialised embolic material (glue or coils) is delivered through the catheter to the targeted abnormal vessels.
The embolic material blocks the abnormal connection and reduces or stops the pathological blood flow. Detailed angiographic imaging is used to assess the DAVF during treatment and confirm the result.
The catheter is removed once the planned treatment has been completed. DAVF embolisation targets an abnormal connection within the dural vascular system, with the aim of stopping abnormal blood flow between arteries and veins.
DAVF vs Brain AVM
DAVF vs Brain AVM
Although both conditions can be treated using endovascular techniques, their anatomy and treatment strategies are different.
| DAVF | Brain AVM |
|---|---|
| Abnormal connection involving vessels within the dura | Abnormal network of vessels within or around the brain |
| Usually involves abnormal connections between dural arteries and veins | Typically involves abnormal connections between arteries and veins through an AVM nidus |
| Treatment focuses on disconnecting or closing the abnormal fistulous connection | Treatment may target the AVM's abnormal vascular network |
| Embolisation is commonly an important treatment approach | Embolisation may be used alone or alongside surgery or radiosurgery |
| Symptoms and risk depend on venous drainage patterns | Risk depends on AVM anatomy, location and vascular characteristics |
When Might DAVF Embolisation Be Recommended?
DAVF embolisation may be considered when a DAVF has been identified and its vascular anatomy indicates that endovascular treatment is appropriate.
Your specialist will consider:
- The location of the DAVF
- The arteries supplying the fistula
- The pattern of venous drainage
- Whether there is abnormal venous pressure
- Your symptoms
- Whether the DAVF has caused bleeding
- The risk associated with its drainage pattern
- Your overall health
- Whether embolisation alone is appropriate
Not every DAVF has the same level of risk. Some may be monitored in selected circumstances, while others require treatment because their venous drainage pattern creates a greater risk of neurological complications or bleeding.
A detailed vascular assessment is therefore essential before deciding on treatment.
Potential Benefits of DAVF Embolisation
Minimally Invasive Treatment of an Abnormal Vascular Connection
For appropriately selected patients, DAVF embolisation may provide several potential benefits.
Minimally Invasive Approach
Treatment is performed through the blood vessels using specialised catheters rather than open surgery.
Targets the Abnormal Connection
Embolisation allows the specialist to directly target the vessels forming the DAVF.
Can Stop Abnormal Blood Flow
Successful embolisation can close the abnormal connection and restore a more normal blood flow pattern.
DAVF-Related Symptoms Relief
Closing the abnormal connection may improve symptoms caused by the DAVF, depending on the underlying condition.
May Reduce Future Risk
For DAVFs with higher-risk venous drainage patterns, successful treatment may reduce the risk associated with the abnormal connection.
It is important to remember: Every DAVF is different. The potential benefits of embolisation depend on its location, vascular anatomy, venous drainage and individual clinical circumstances.
The Borden classification simplifies DAVFs into three types based on the venous drainage:
- Type I: Drainage into a dural venous sinus or meningeal vein with normal, forward (anterograde) flow. These are usually considered benign, having a low risk of hemorrhage.
- Type II: Drainage into a dural venous sinus with retrograde flow into subarachnoid veins (cortical venous reflux or CVD). This poses a higher risk of neurological events like hemorrhaging.
- Type III: Direct drainage into subarachnoid veins, often through an isolated dural sinus segment. This poses the highest risk of hemorrhage and neurological symptoms due to venous hypertension.
What Are the Potential Risks and Limitations?
Understanding the Risks of DAVF Embolisation
DAVF embolisation is a specialised neurointerventional procedure and carries potential risks.
Potential risks may include:
- Blood vessel injury
- Changes in venous drainage
- Reaction to contrast dye
- Bleeding or bruising at the catheter access site
- Incomplete closure of the DAVF
- Need for additional treatment
The risks depend on the location of the DAVF, its arterial supply, venous drainage and the technique required for treatment.
Your specialist will discuss the potential benefits, risks and alternative treatment options before recommending embolisation.
Recovery After DAVF Embolisation
What Can You Expect After Treatment?
Following DAVF embolisation, you will be monitored to assess your neurological condition and recovery. Most patients are discharged within 24–48 hours. Patients should keep in mind that possible temporary symptoms can include mild headache, fatigue, or nausea.
Depending on the complexity of treatment, monitoring may include neurological assessment, blood pressure monitoring and follow-up brain or vascular imaging.
Your recovery depends on:
- The location of the DAVF
- The complexity of the vascular anatomy
- The extent of treatment performed
- Whether the DAVF previously caused bleeding
- Your neurological condition
- Whether additional treatment is required
Your specialist will provide personalised advice regarding activity, medications, follow-up appointments and further imaging.
Follow-up imaging (DSA or MRA) is recommended to confirm that the abnormal connection has been successfully closed and to monitor for recurrence. With timely treatment, the long-term outlook is excellent, and many patients return to full activity.
Your DAVF Embolisation Treatment Journey
| Step | Stage | Description |
|---|---|---|
| 1 | Specialist Neurovascular Assessment | Review your symptoms, medical history and previous brain and vascular imaging. |
| 2 | Detailed DAVF Imaging | Map the abnormal connection, feeding arteries and venous drainage pattern. |
| 3 | Individualised Treatment Planning | Determine the safest and most appropriate endovascular treatment approach. |
| 4 | Catheter-Based Embolisation | Guide a catheter to the DAVF and deliver specialised embolic material. |
| 5 | Blood Flow Assessment | Use angiographic imaging to confirm whether abnormal blood flow has been stopped. |
| 6 | Recovery & Monitoring | Monitor your neurological condition and recovery following treatment. |
| 7 | Follow-Up & Further Imaging | Continue specialist review and imaging to confirm the treatment result. |
Why Choose the Supreme Vascular and Interventional Clinic for DAVF Embolisation?
Specialist Brain-to-Body Vascular Expertise Under One Roof
DAVF treatment requires detailed understanding of complex brain and dural vascular anatomy, together with precise neurointerventional techniques.
At the Supreme Vascular and Interventional Clinic, care is led by Dr. Manish Taneja, a dual-trained neurointerventional and peripheral vascular intervention specialist.
Neurointerventional Expertise
Specialist knowledge of the blood vessels surrounding and supplying the brain supports detailed DAVF assessment and treatment planning.
Brain-to-Body Vascular Perspective
Dr. Manish Taneja's expertise spans neurointerventional and peripheral vascular procedures, providing a broader understanding of vascular disease.
Minimally Invasive Treatment
Where appropriate, DAVF embolisation allows the abnormal vascular connection to be treated through the blood vessels rather than open surgery.
Advanced Imaging
Detailed angiographic imaging is essential for understanding the DAVF's arterial supply and venous drainage.
Continuum of Care
From specialist assessment and treatment planning through follow-up and further imaging, the Supreme Vascular and Interventional Clinic provides continuity of specialist care under one roof.
Frequently Asked Questions
Is a DAVF the same as a brain AVM?
No. A DAVF is an abnormal fistulous connection involving the dural vascular system, while a brain AVM is an abnormal network of blood vessels within or around the brain.
What symptoms can a DAVF cause?
Symptoms vary depending on the DAVF's location and venous drainage and may include pulsatile tinnitus, headaches, visual symptoms, seizures or other neurological problems.
How is a DAVF diagnosed?
DAVFs are assessed using brain and blood vessel imaging. Cerebral angiography is particularly important for defining the fistula's feeding arteries and venous drainage.
Can a DAVF be treated without open surgery?
Yes. Many selected DAVFs can be treated using minimally invasive endovascular embolisation, although the appropriate treatment depends on the DAVF's anatomy.
What happens after DAVF embolisation?
Patients are monitored following treatment and may undergo follow-up imaging to confirm that the abnormal vascular connection has been successfully closed.
Can a DAVF come back after embolisation?
Residual or recurrent abnormal connections can occur in some cases, which is why specialist follow-up and appropriate imaging are important after treatment.
Specialist Assessment for DAVF Embolisation in Singapore
A dural arteriovenous fistula requires detailed assessment of its arterial supply and venous drainage before treatment decisions can be made. At the Supreme Vascular and Interventional Clinic, Dr. Manish Taneja provides specialist neurointerventional assessment, advanced vascular imaging review and personalised treatment planning for patients with DAVFs and other vascular conditions.
With expertise spanning the brain and body, our specialized clinic provides minimally invasive vascular and neurointerventional care with continuity under one roof. If you have been diagnosed with a DAVF, referred for embolisation or are seeking a specialist second opinion, our team can help you understand your condition and the treatment options available.
- AVM Embolisation
- Endovascular Embolisation
- Intracranial Stenting
- Image-Guided Vascular Treatment
- Cerebral Angiography
- Brain AVM
- Intracranial Dural AV Fistula
- Spinal Dural Arteriovenous Fistula
- Intracranial Vascular Malformations
