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Endovenous Thermal Ablation

Endovenous thermal ablation is a minimally invasive procedure used to treat varicose veins. It involves the application of heat energy, either through laser or radiofrequency, to seal off the affected veins. This treatment method helps improve blood flow and alleviate symptoms associated with varicose veins. 


We offer endovenous thermal ablation as a safe and reliable treatment for patients with varicose veins. Contact us today to schedule a consultation and receive a tailored treatment plan for the best possible outcome.

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What You Should Know About Endovenous Thermal Ablation

What Is Endovenous Thermal Ablation?

Endovenous thermal ablation is a minimally invasive procedure used to treat varicose veins


During the procedure, a thin catheter is inserted into the affected vein using an ultrasound device. The catheter delivers thermal energy, either in the form of laser or radiofrequency, to heat and close off the vein. This causes the vein to collapse and eventually be reabsorbed by the body, leading to improved blood flow and a reduction in symptoms. 


Endovenous thermal ablation effectively treats varicose veins and offers a faster recovery than traditional surgical methods.


What Are The Different Types Of Endovenous Thermal Ablation?

There are two main types of endovenous thermal ablation used to treat varicose veins:

  • Radiofrequency 

  • Laser


These techniques generate heat to seal the affected vein and improve blood flow. The choice between laser and radiofrequency ablation depends on individual factors and our doctor’s recommendation.


Why Is Endovenous Thermal Ablation Needed?

Endovenous thermal ablation is needed to address the underlying causes and symptoms of varicose veins. Varicose veins occur when the valves within the veins become weak or damaged, leading to improper blood flow and pooling. This can result in discomfort, pain, swelling, and cosmetic concerns. 


Endovenous thermal ablation provides an effective solution by closing off the diseased vein, allowing the body to reroute blood through healthier veins. By targeting the source of the problem, this procedure not only alleviates symptoms but also helps prevent complications such as ulcers and blood clots.


What Are The Possible Risks And Complications?

While endovenous thermal ablation is generally safe and well-tolerated, there are potential risks and complications associated with the procedure.


These complications may include: 


Serious complications are rare when the procedure is performed by a skilled and experienced vascular surgeon. It is important for patients to discuss their medical history and any concerns with Dr Desmond Ooi before undergoing endovenous thermal ablation.



Before undergoing endovenous thermal ablation, a pre-procedure evaluation is typically conducted to ensure the patient's suitability for the treatment. This evaluation often involves an assessment of the venous system using ultrasound imaging. The ultrasound helps to identify the location and extent of the affected veins, allowing Dr Desmond Ooi to plan the procedure accordingly. 


In addition, patients may be advised to discontinue certain medications before the procedure.


What Happens During The Endovenous Thermal Ablation Procedure?

During the endovenous thermal ablation procedure, several steps are involved. 


  1. Local anaesthetic is administered.

  2. The affected vein is identified through ultrasound. 

  3. A small incision is made in the leg.

  4. A catheter is inserted through the incision and guided to the affected vein. 

  5. A specialised tool is guided through the catheter to generate laser or radiofrequency waves.

  6. A numbing fluid is injected around the vein.

  7. The affected vein is sealed off.

  8. A bandage is placed over the incision.


After undergoing endovenous thermal  ablation, there are several important post-procedure instructions to follow. 


These include: 

  • Elevating the leg when sitting down to promote blood circulation 

  • Wearing compression socks to aid in healing 

  • Keeping the incision clean and dry 

  • Remaining active with regular walking to promote blood flow 


By adhering to these instructions, patients can optimise their healing and achieve the best possible outcomes from the endovenous thermal ablation procedure.

Will My Blood Flow Normally After The Procedure?

Blood flow will return to normal after endovenous thermal ablation. The body will reabsorb the treated veins, and blood will flow through healthy veins. In fact, endovenous thermal ablation can improve blood flow by reducing the amount of blood that pools in the affected veins.

What Is Recovery Like After The Procedure?

Patients can generally expect to return to work within a week or so, depending on their individual healing progress. While exercise is encouraged, it is recommended to start with simple activities such as walking and gradually increase intensity, taking it easy during the first week. 


Some individuals may experience a pulling sensation in the thigh area, but this is typically temporary and should diminish within a couple of weeks.

  • Can medication and compression stockings treat varicose veins?
    Medication and compression stockings may help with mild symptoms but it doesnot treat the root cause of varicose veins. The most effective treatments are through surgery and minimally invasive procedures.
  • Can I get my varicose veins treated if I am diabetic?
    Diabetic patients can get their varicose veins treated using minimally invasive techniques that leave minimal wounds that heal well.
  • How long is the stay in hospital after varicose vein treatment?
    Varicose vein treatments are usually done as a day surgery. Patients will be discharged after the procedure.
  • How soon can I return to work after treatment?
    While Dr Ooi provides his patients with a 2 week medical certificate, some patients may be able to return to work within 4-5 days.
  • Can I exercise after varicose vein treatment?
    Low-impact exercises like walking are allowed after treatment, but patients should avoid strenuous exercises for at least a week.
  • Where does my blood flow once the damaged veins are removed?
    The blood in the affected veins will reroute into your healthier veins and flow normally after varicose vein treatment.
  • Will my insurance cover varicose vein treatments?
    Depending on the severity and symptoms of your varicose veins, your treatment can be insurance claimable. Contact our clinic to find out more information on your out-of-pocket fees.

Dr Desmond Ooi: Endovenous Thermal Ablation in Singapore

Dr Desmond Ooi offers endovenous thermal ablation treatment in Singapore to patients suffering from varicose veins. Dr Desmond Ooi has extensive knowledge and training in treating varicose veins and other venous disorders.


Dr Ooi and his team of healthcare professionals are committed to providing personalised care and support to each patient, ensuring their needs and concerns are addressed throughout the treatment process. Make an appointment with Dr Desmond Ooi for your varicose vein treatment.

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