A one-day clinical workshop on sclerosing injection technique for telangiectasias and reticular veins, including sclerosant selection, foam preparation and compression protocol.
In a sclerotherapy training course that emphasizes clinical judgment, the practitioner must first assess the patient's venous anatomy, symptom burden, and cosmetic goals. The decision to treat a telangiectasia, a reticular vein, or a larger varicose conduit rests on accurate measurement of vessel calibre and on whether underlying venous insufficiency has been ruled out. When a patient presents with recurrent varicosities or signs of reflux, a duplex ultrasound should precede any cosmetic injection, because treating isolated telangiectasias without addressing the hemodynamic driver may lead to rapid recurrence.
Matching sclerosant type and concentration to vessel calibre is a core skill taught in sclerotherapy training. Telangiectasias, typically under 1 mm, respond to low-concentration solutions such as 0.5% polidocanol or 0.1% sodium tetradecyl sulfate. Reticular veins, ranging from 1 to 3 mm, require higher concentrations, often 1% polidocanol or 0.3% sodium tetradecyl sulfate. The clinician must avoid using a concentration that exceeds the vessel's tolerance, as this raises the risk of ulceration. The choice between the two detergent agents is guided by their pharmacologic profile rather than brand loyalty.
The decision to use foam or liquid sclerosant follows the same principle of vessel size. Foam, prepared with the Tessari method by passing one part sclerosant and four parts gas between two syringes joined by a three-way stopcock, displaces blood and provides a larger contact surface, making it suitable for vessels greater than 2 mm. Liquid injection remains preferred for fine telangiectasias where precise placement is essential. Understanding that foam stability declines after a few minutes informs the timing of injection, and the practitioner must monitor for foam migration that could compromise adjacent structures.
Injection technique demands attention to needle gauge, typically 30-gauge for fine vessels and 27-gauge for larger veins, and to a shallow angle of entry that follows the vessel, close to parallel with the skin rather than steeply into it. The practitioner injects a small volume, often 0.05-0.1 mL per site, and watches for immediate blanching. Recognition of extravasation, evidenced by swelling or loss of the characteristic white column, requires immediate cessation of injection and gentle compression. Early identification of complications such as telangiectatic matting, post-inflammatory hyperpigmentation, or skin necrosis allows prompt intervention, ranging from topical steroids to wound care and, in severe cases, referral for surgical debridement.
Accepted contraindications include known hypersensitivity to the sclerosant, acute deep vein thrombosis or pulmonary embolism, active local infection, prolonged immobility, and pregnancy. For foam specifically, a known right-to-left shunt warrants caution. When reflux is suspected, a duplex assessment confirms the presence and extent of venous insufficiency, guiding whether sclerotherapy alone is appropriate or whether adjunctive procedures are needed. Post-procedure compression, with duration set by the treating clinician and commonly running from several days to a few weeks, improve vein closure and reduce bruising; patient adherence directly influences aesthetic outcome. A live-patient training day offers tactile feedback, real-time decision making, and the chance to manage unexpected events, whereas sclerotherapy training online can demonstrate theory, video of technique, and case discussion, but cannot replace the sensory cues gained from hands-on injection.
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How do I decide whether to use foam or liquid sclerosant for a given vessel?
The choice depends on vessel diameter and blood flow. Foam displaces blood and creates a larger contact surface, making it useful for vessels larger than about 2 mm where liquid may be washed away quickly. Liquid sclerosant provides precise placement and is preferred for fine telangiectasias under 1 mm. Consider the patient's tolerance for compression and the risk of foam migration; if the area is close to arterial structures, liquid may be safer. Review duplex data to confirm calibre before selecting the formulation.
What concentration of polidocanol is appropriate for a 0.8 mm telangiectasia?
For telangiectasias under 1 mm, a low concentration of polidocanol, typically 0.5% (5 mg/mL), is recommended. This concentration provides sufficient endothelial damage while minimizing the risk of ulceration or hyperpigmentation. The injection volume should be limited to 0.05-0.1 mL per site to avoid over-dosing. Adjust the concentration only if the vessel appears larger than expected on duplex or if the patient has a history of poor response to lower concentrations.
When should I order a duplex ultrasound before performing sclerotherapy?
A duplex ultrasound is indicated whenever there is clinical suspicion of venous reflux, when the patient reports symptoms of chronic venous disease, or when the distribution of veins suggests a deeper conduit may be contributing to the appearance. The study confirms vessel calibre, identifies incompetent perforators, and helps differentiate isolated telangiectasias from those fed by a refluxing source. Because scope of practice varies by licensing board, clinicians should verify that performing or interpreting duplex studies aligns with their own regulatory authority before ordering.
How can I recognize and manage an intra-arterial injection emergency?
Suspect intra-arterial injection if the patient experiences immediate intense pain, blanching that spreads beyond the injection site, or a sudden loss of pulse in the distal limb. Stop the injection immediately, keep the needle in place, and apply gentle pressure. Call for emergency assistance, initiate high-flow oxygen, and consider intra-arterial vasodilator therapy if within the scope of practice. Document the event thoroughly and arrange urgent vascular evaluation. Early recognition and rapid response are critical to prevent tissue loss.
What steps should I take if I see early signs of skin necrosis after injection?
Early necrosis may appear as a painful, dusky area with loss of skin integrity within 24-48 hours. Discontinue any further injections in the area, keep the wound clean, and apply a non-adherent dressing. Initiate topical antibiotic ointment to prevent secondary infection and consider a low-dose oral analgesic for pain control. If the lesion progresses, refer the patient promptly to a wound-care specialist or surgeon for debridement. Document the concentration and volume used, as this information guides future treatment adjustments.
What are the key differences between an online sclerotherapy training module and a live-patient hands-on session?
Online sclerotherapy training can convey theory, demonstrate video of injection technique, and provide case discussions that reinforce decision-making. It allows review at the learner's own pace but cannot reproduce tactile feedback, the feel of tissue resistance, or the visual cues of real-time extravasation. A live-patient session offers the opportunity to practice needle placement, adjust angle based on patient anatomy, and respond instantly to complications such as unexpected bleeding or pain. The hands-on experience builds muscle memory that is essential for safe, effective injection.
Which needle gauge is recommended for treating reticular veins versus telangiectasias?
For reticular veins measuring 1-3 mm, a 27-gauge needle provides sufficient lumen to deliver the required volume while maintaining control. For fine telangiectasias under 1 mm, a finer 30-gauge needle is preferred to minimize tissue trauma and allow precise placement of a very small volume. The needle should be beveled and inserted at a shallow angle to follow the vessel's course, reducing the risk of perforation or extravasation.
How does patient compliance with compression garments affect the final result?
Compression garments promote vein closure by reducing venous pressure and limiting re-expansion of treated vessels. Consistent wear for the period the clinician specifies improves the durability of the aesthetic outcome and reduces bruising. Non-compliance can lead to early recanalization, residual varicosities, and a higher likelihood of post-procedural hyperpigmentation. Educate patients on proper garment fit, duration of wear, and the impact of adherence on both safety and visual results.
