CLaCS vs. Conventional Sclerotherapy: 2026 Updates in Varicose Vein Treatment
CLaCS (Cryo-Laser and Cryo-Sclerotherapy) and conventional sclerotherapy are both effective treatments for varicose veins and spider veins. This 2026 update explores the distinctions between these methods, highlighting recent advancements and guiding patients in Belo Horizonte toward informed decisions. Understanding their differences is key to selecting the most suitable approach for venous health.
Medically Reviewed by Dr. Rafael Costa
What is CLaCS and how does it differ from Conventional Sclerotherapy?
CLaCS combines transdermal laser with cryogen cooling and sclerosing injections, offering enhanced precision and comfort. Conventional sclerotherapy primarily uses direct injections of a sclerosant solution into the affected veins. The combination therapy targets veins more effectively while minimizing discomfort and skin damage.
CLaCS represents an advanced approach to treating small to medium-sized varicose veins and spider veins. It integrates three modalities: a transdermal laser to heat and damage the vein wall, simultaneous cryogen cooling to protect the skin and reduce pain, and a subsequent injection of a sclerosing agent (sclerotherapy) into the treated vessel. This synergy aims for superior vein closure and reduced side effects. Conventional sclerotherapy, on the other hand, involves injecting a liquid or foam sclerosant directly into the vein, causing it to scar and close. While effective, CLaCS's multi-modal approach, especially with cryo-cooling, often improves patient comfort and treatment efficacy, particularly for superficial veins. Dr. Rafael Costa, with his extensive experience at SoulClin in Belo Horizonte, frequently uses advanced techniques like CLaCS to optimize patient outcomes.
CLaCS vs. Conventional Sclerotherapy: Key Differences
| Feature | CLaCS (Cryo-Laser and Cryo-Sclerotherapy) | Conventional Sclerotherapy (Liquid/Foam) | | :------------------ | :----------------------------------------------------------------------- | :------------------------------------------------------------------- | | Mechanism | Combines transdermal laser, cryo-cooling, and sclerosant injection | Direct injection of sclerosant (liquid or foam) | | Target Veins | Spider veins, reticular veins, small varicose veins | Spider veins, reticular veins, small to medium varicose veins | | Pain Management | Cryo-cooling significantly reduces pain during laser and injection | Local anesthetic sometimes used; sclerosant can cause mild burning | | Skin Protection | Cryo-cooling protects skin from laser heat, reducing burns/pigmentation | Less direct skin protection; temporary pigmentation more common | | Precision | Enhanced by laser targeting and often augmented reality guidance | Relies on visual assessment and/or ultrasound guidance | | Sessions | Often requires fewer sessions for similar results due to combined effect | May require more sessions depending on vein size and extent | | Recovery | Similar to conventional, rapid with compression; minimal downtime | Similar to CLaCS, rapid with compression; minimal downtime |
What are the latest considerations for CLaCS treatment in 2026?
Recent updates in 2026 emphasize CLaCS's role in precise targeting of reticular and spider veins, leveraging enhanced imaging and cooling technologies. Its combination of laser and cryo-sclerotherapy is increasingly favored for aesthetic outcomes and patient comfort, particularly for complex superficial networks.
In 2026, the application of CLaCS benefits from refined protocols and improved equipment, enhancing its precision. The use of augmented reality vein finders during the procedure allows for more accurate targeting of underlying feeder veins, which are often invisible to the naked eye. This improved visualization, coupled with advanced cryo-cooling systems, ensures better skin protection and reduced discomfort during the laser application. The synergistic effect of laser and cryo-sclerotherapy is proving highly effective for patients seeking both functional and aesthetic improvements for their spider veins and reticular veins. Dr. Rafael Costa incorporates these technological advantages at SoulClin to deliver tailored treatment plans, building on more than 15,000 procedures performed. For a deeper dive into this technology, consider reading our The Definitive Guide to CLaCS: Advanced Spider Vein Removal.
How has conventional sclerotherapy evolved by 2026?
By 2026, conventional sclerotherapy continues to be a cornerstone treatment, with refined techniques in foam preparation and ultrasound guidance improving its efficacy and safety. Polidocanol remains a primary sclerosant, with ongoing research focusing on optimal concentrations and volumes for various vein sizes.
Conventional sclerotherapy, a long-standing treatment for varicose veins and telangiectasias, has seen continuous refinement. In 2026, the focus is on optimizing foam sclerotherapy, where the sclerosant is mixed with air to create a foam. This foam displaces blood, allowing for better contact with the vein wall and enhanced efficacy, particularly for larger reticular veins or smaller varicose veins. Ultrasound guidance is routinely employed to ensure precise injection into deeper veins, minimizing risks and improving outcomes, as supported by current European Society for Vascular Surgery (ESVS) guidelines. The choice between liquid and foam, and the concentration of the sclerosant, is meticulously tailored to each patient's specific venous anatomy and disease severity. Dr. Rafael Costa's practice in Belo Horizonte emphasizes these evidence-based adaptations.
What are the potential risks and side effects of these treatments?
Both CLaCS and conventional sclerotherapy carry minimal risks, including temporary skin discoloration, swelling, or bruising at the injection site. Serious complications like allergic reactions or skin ulceration are rare. Patient selection and adherence to post-procedure care significantly reduce potential adverse effects.
While generally safe, both CLaCS and conventional sclerotherapy can have temporary side effects. Common occurrences include mild discomfort, bruising, swelling, and temporary pigmentation (hyperpigmentation) along the treated vein, which usually fades over weeks or months. For CLaCS, superficial skin burns are rare due to cryo-cooling. With conventional sclerotherapy, temporary tenderness or a lumpy feeling in the treated vein is possible. Serious complications, such as allergic reactions, skin ulceration, or superficial thrombophlebitis, are very uncommon but require prompt medical attention. A thorough pre-procedure evaluation by a vascular specialist like Dr. Rafael Costa at SoulClin helps identify and mitigate individual risks. Understanding What are varicose veins and how to treat them can provide further context on venous health.
What does recovery look like after CLaCS or conventional sclerotherapy?
Recovery from both CLaCS and conventional sclerotherapy is typically rapid, allowing patients to resume most normal activities immediately. Compression stockings are often recommended for a period to aid healing and optimize results. Strenuous exercise is usually avoided for a few days post-treatment.
Patients generally experience a quick recovery following both CLaCS and conventional sclerotherapy. There is usually no downtime, and most individuals can walk and perform light activities immediately after the procedure. Compression therapy, often involving graduated compression stockings, is a critical component of post-treatment care. These stockings help reduce swelling, prevent blood pooling, and promote efficient vein closure. Dr. Rafael Costa advises patients to avoid prolonged standing or sitting and to engage in regular walking. Strenuous exercise, hot baths, saunas, and direct sun exposure on treated areas are typically restricted for a short period to ensure optimal healing and reduce the risk of complications.
When should one consider CLaCS or conventional sclerotherapy?
Patients should consider CLaCS or conventional sclerotherapy when experiencing symptomatic spider veins, reticular veins, or small varicose veins causing discomfort or cosmetic concern. A vascular specialist evaluates the venous system to determine the underlying cause and recommend the most appropriate, individualized treatment plan.
The decision to pursue CLaCS or conventional sclerotherapy is best made after a comprehensive consultation with a vascular surgeon. These treatments are particularly suitable for patients with telangiectasias (spider veins), reticular veins, or smaller varicose veins that are not due to significant underlying saphenous vein reflux (which might require treatments like Endolaser). Symptoms such as aching, itching, burning, or cosmetic dissatisfaction are common indicators. Dr. Rafael Costa at SoulClin in Belo Horizonte performs a detailed clinical examination and often uses vascular ultrasound to assess the venous system, ensuring that the chosen treatment effectively addresses the patient's specific condition and goals, aligning with the latest guidelines from the European Society for Vascular Surgery (ESVS).
Frequently Asked Questions
Is CLaCS more effective than conventional sclerotherapy?
CLaCS offers enhanced precision and combined action, often leading to fewer sessions for certain types of veins compared to conventional sclerotherapy alone. Its multi-modal approach with laser and cryo-cooling can improve outcomes for spider and reticular veins, particularly concerning aesthetic results and patient comfort during treatment.
How many CLaCS sessions are typically needed?
The number of CLaCS sessions varies based on the extent and type of veins being treated. While some patients may achieve satisfactory results in one or two sessions, others with more widespread or complex venous networks might require additional treatments. A personalized plan is developed during consultation.
Can CLaCS treat large varicose veins?
CLaCS is primarily designed for spider veins, reticular veins, and small varicose veins. Larger varicose veins, especially those involving saphenous vein reflux, typically require other treatments like Endovenous Laser Ablation (EVLA) or foam sclerotherapy. A vascular specialist will determine the most suitable approach.
Is conventional sclerotherapy still relevant in 2026?
Yes, conventional sclerotherapy remains a highly relevant and effective treatment for various venous conditions in 2026. With advancements in foam preparation and ultrasound guidance, it continues to be a cornerstone therapy, particularly for spider veins, reticular veins, and certain varicose veins, often chosen for its versatility.
What is the main advantage of cryo-cooling in CLaCS?
The main advantage of cryo-cooling in CLaCS is its ability to protect the skin from the laser's heat, significantly reducing pain and discomfort during the procedure. This also minimizes the risk of temporary skin pigmentation or burns, allowing for more aggressive and effective laser parameters to be used.
Are there any specific preparations before CLaCS or sclerotherapy?
Patients are typically advised to avoid certain medications like aspirin or anti-inflammatory drugs that can increase bruising, and to moisturize their legs in the days leading up to the procedure. Discussing all medications and medical history with Dr. Rafael Costa ensures proper preparation and safety.
How long do the results of CLaCS and sclerotherapy last?
The treated veins are permanently closed and absorbed by the body. However, new spider veins or varicose veins can develop over time due to genetic predisposition or lifestyle factors. Periodic follow-ups and maintenance treatments may be recommended to sustain long-term aesthetic and functional results.
Can CLaCS and sclerotherapy be performed on all skin types?
Both treatments can be performed on various skin types, but CLaCS, with its controlled laser and cryo-cooling, often offers advantages for darker skin tones by minimizing the risk of post-inflammatory hyperpigmentation. A thorough skin assessment is always conducted to ensure the safest and most effective treatment parameters.
Is CLaCS covered by health insurance?
Coverage for CLaCS, like many aesthetic vascular treatments, can vary by insurance provider and the medical necessity of the procedure. While some functional aspects might be covered, purely cosmetic treatments are often not. Patients should consult their insurance provider and the clinic for detailed information.
What is the role of ultrasound in these treatments?
Ultrasound plays a crucial role, especially in conventional foam sclerotherapy, for mapping the venous system, identifying feeder veins, and guiding injections into deeper or less visible vessels. For CLaCS, it helps confirm the absence of significant underlying reflux and can assist in pre-treatment planning for optimal targeting.
